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Open Access Article
1 - Investigating the ability to predict human resource excellence through futures study skills in ceramic tile companies of Yazd province
Amirehsan Eshaghiyeh Hossien Eslami Hadi HematianBackground:Quality human resources are the most important resource of any company and leading industries,realizing this fact,have made an indescribable effort to make optimal use of this key resource to achieve their goals.Therefore,the present study was conducted with MoreBackground:Quality human resources are the most important resource of any company and leading industries,realizing this fact,have made an indescribable effort to make optimal use of this key resource to achieve their goals.Therefore,the present study was conducted with the ability to predict human resource excellence through futures study skills in ceramic tile companies of Yazd province. Method:This research is applied in terms of purpose and is from a descriptive-correlational type.The statistical population of this study is the managers and personnel of ceramic tile companies of Yazd province,whose number is 22,000people and using Krejcie and Morgan table,at least384people were selected as a statistical sample and 390 questionnaires were collected based on an available sampling process,distribution, and data. Data collection was done by the field method and the collection tool was a researcher-made questionnaire.In data analysis,the SPSS software was used to test the hypotheses and conceptual model of the research,and the SmartPLS was used for the validity and reliability of the questionnaire.Findings:The findings showed that the correlation coefficient between futures study skills and human resource excellence as well as other dimensions of futures study and human resource excellence is significant and future study skills have25.3%of the ability to predict the human resource excellence of ceramic tiles of Yazd province.Conclusion:The managers of ceramic tile companies can achieve human resource excellence based on the past work process to identify the current changes signals of possible situations that may occur in the future,as well as to shape the desired world of tomorrow. Manuscript profile -
Open Access Article
2 - In vitro bioactivity of silicophosphate glasses doped with ZnO, SrO or CuO
H. A. ElBatal A. A. El-Kheshen M. A. Marzouk N. A. Ghoneim F. H. ElBatal M. A. Ouis A. M. Fayad A. M. Abdelghany -
Open Access Article
3 - Study of sintering temperature on the structure of silicon carbide membrane
A. Sadighzadeh Sh. Mashayekhan B. Nedaie A. H. Ghorashi -
Open Access Article
4 - Enhancing the efficiency of modified polypropylene fumarate (PPF) membrane by graphene oxide / pluronic F68 additive for wastewater treatment of ceramic factories
ehsan ghorban nejad ali arasteh nodeh susan khosroyar mahmoodreza khadangiBackground and Objective: Due to the fact that the wastewater of ceramic factories have higher TDS and turbidity, Poly propylene fumarate (PPF) membranes seems to be suitable for the treatment of this type of wastewater due to their good mechanical performance, adjustab MoreBackground and Objective: Due to the fact that the wastewater of ceramic factories have higher TDS and turbidity, Poly propylene fumarate (PPF) membranes seems to be suitable for the treatment of this type of wastewater due to their good mechanical performance, adjustable biodegradability and easy production. However, the main disadvantage of the PPF in membrane separation related to hydrophobicity property of it which leads to a low membrane flux and is easily susceptible for fouling. Presence of oxygenated functional groups such as hydroxyl, epoxy, and carboxyl in GO causes the modified membranes have high effective flux and better antifouling property. One of main problem associated with preparation of membranes containing GO is possibly related to the more homogenous dispersion of GO into the polymer matrix. The presence of Pluronic F-68 can solve this problem. Material and Methodology: In this work, in order to improve the hydrophilic and morphological properties of PPF membrane, the graphene oxide that has been modified by Pluronic F-68 was added in to the membrane. These membranes were prepared with VIPS method. The effects of the modified additive concentrations and vapor exposure times on hydrophilicity and permeation flux of the PPF membranes in mentioned wastewater treatment were investigated. Findings: Increasing GO/Pluronic F-68 loading from 0 wt. % to 4 wt. %, the hydrophilicity level is increased and the contact angle is decreased by increasing the exposure time up to 30 min due to the high poros­ity of membranes than others. The modificated membranes by Pluronic F-68 /GO present higher pure water permeability in comparison with the neat PPF mem­brane. Discussion and Conclusion: These membranes have higher pure water permeability in comparison with the neat PPF mem­brane. The membrane modified with 4wt. % of GO/Pluronic F-68 (Exposure time of 20 min) has high ability in reduction of wastewater pollution indices in comparison with others. Manuscript profile -
Open Access Article
5 - Heat loss reduction using ceramic micro-particles in paint of the inner walls of a room with radiation cooling panel
Ghanbar Ali Sheikhzadeh Ali Akbar Azemati Armin SaraeiIntroduction and Aim Limited resources and the need for energy conservation have made the use of energy loss preventive thermal insulations, like the paints containing micro mineral particles, an economic option in different industries and buildings. The aim of the curr MoreIntroduction and Aim Limited resources and the need for energy conservation have made the use of energy loss preventive thermal insulations, like the paints containing micro mineral particles, an economic option in different industries and buildings. The aim of the current study is to investigate the effect of modern insulation, such as paints with ceramic micro-particle in internal walls of a room with radiative cooling panels, on energy consumption. Method In the present study, to investigate the flow field and temperature distribution in a room with a wall of radiation cooling, a three-dimensional cavity has been simulated with different boundary conditions. The effect of coating with a paint containing ceramic micro-particles, ordinary acrylic paints and no paint in different states of changing the boundary conditions, such as changes in wall temperature and absorption coefficient on a room with wall cooling radiation has been studied and the results were compared. Findings Using the computer code, the interior surface temperature is obtained for different boundary conditions and used as a boundary condition for simulation. In case of using wall radiative cooling panels, room temperature is in the comfort zone in all cases, and the lowest temperature occurs when using paints with ceramic micro-particles in the interior surfaces of the room. Discussion It was observed that the coating containing ceramic micro-particles acted as a thermal insulation and reduced energy consumption by about 22% . Manuscript profile -
Open Access Article
6 - Conversion of poisonous gases for samands car with dual fuel system to innocuous gases with (La,Ce)(Pd,Co,Fe,Mn)O٣ - perovskite catalysts and its comparison to imported catalyst of Iran Khodro
Arsia Khanfekr Kaveh Arzani Ali Nemati Morteza HossainiIn this project work on Prototype Production ofCatalyst Converter for samand automobiles’ dual fuelsystem. La (Fe,Co,Ce,Pd)O-3 perovskite catalyst withABO3 structure was prepared by the citrate routewithout use of Pt and Rh and only used Pd(2.64 g).Then deposited MoreIn this project work on Prototype Production ofCatalyst Converter for samand automobiles’ dual fuelsystem. La (Fe,Co,Ce,Pd)O-3 perovskite catalyst withABO3 structure was prepared by the citrate routewithout use of Pt and Rh and only used Pd(2.64 g).Then deposited on ceramic monoliths according to adip coating procedure. Then test catalyst on samandcar with XU7 motors model and measured the amountof emission with (AVL) test at Sapco Company.Compared the catalyst with imported catalysts of Irankhodro company with noble metals such as Pd, Ptand Rh by Euro III standards. In conclusion Perovskitecatalysts reduces emission better than importedcatalysts, with lower emission and price.Monolite of catalysts were characterized by specificsurface area measurements (BET), and X-raydiffraction (XRD) and X-ray fluorescence (XRF), andcoat characterized by scanning electron microscopy(SEM), LINE SCAN and MAP that illustrate interfacebetween coat and base. Manuscript profile -
Open Access Article
7 - Investigating the Research Conducted on Improving the Properties of Oxidation Resistance and Erosion of ZrB2/SiC Composites
K Kolahgar Azari A Alizadeh A Sayadi Kelemi -
Open Access Article
8 - Influence of Al2O3 Additive on Mechanical Properties of Wollastonite Glass-Ceramics
Monavvar Rahimi Babak Sadeghi Maryam Kargar Razi -
Open Access Article
9 - Simulation and Dynamic-Thermal Analysis of Ceramic Disc and Brake Pad for Optimization by Finite Element Method
Navvab Gholami Ahmad Afsari Seyed Mohammad Reza Nazemosadat Mohammad Javad AfsariThe braking system in cars is directly deals with the issue of safety, and as a result, it is essential to pay attention to this matter. One of the materials used to make disc and brake pads in disc brakes is a ceramic material. This research aims to simulate and analyz MoreThe braking system in cars is directly deals with the issue of safety, and as a result, it is essential to pay attention to this matter. One of the materials used to make disc and brake pads in disc brakes is a ceramic material. This research aims to simulate and analyze the dynamic-thermal ceramic brake disc during the braking operation using the finite element method. Currently, the conventional brake disc is used in the Peugeot 206 car (domestic production), which has low efficiency in terms of life, wear, etc. Therefore, in this research, considering the significant production of Peugeot 206 car in the country, the disc and brake pads of this car have been selected, which were first modeled by Catia software, and after transferring the model to Abacus software and defining the types of ceramics and Cast iron was analyzed by finite element method. Compared the results of the Peugeot 206 ceramic brake disc and pad analysis were with the results of the standard (cast iron) discs in this car. The results showed that the maximum von Mises stress in the ceramic disc was 260.7 MPa, while the maximum von Mises stress in the cast iron disc was 293.3 MPa. The amount of heat produced in the ceramic disc during the braking action in 4 seconds was almost 84% less than the cast iron disc in the same period. Also, the results showed that the ceramic disc has a higher safety factor (1.98) than the cast iron disc (1.45). Manuscript profile -
Open Access Article
10 - ANSYS Modeling for Bone Reconstruction by Using Hybrid Nano Bio Composite
J Sattar Kashan S Mahmood Ali -
Open Access Article
11 - Synthesis and Characterization of Carbon Ceramic Composite Based on Molecularly Imprinted Polymer for Selective Absorption of Cloxacillin Antibiotic from Milk
Vahid Mahmoudi Saeid JafariWith the emergence of the industrial age, the growing concern over environmental pollution has been to drug resistance in humans due to the use of antibiotics and their discharge in environment. The aim of this work was to synthesis of a carbon ceramic composite based o MoreWith the emergence of the industrial age, the growing concern over environmental pollution has been to drug resistance in humans due to the use of antibiotics and their discharge in environment. The aim of this work was to synthesis of a carbon ceramic composite based on molecular imprinted polymers (MIP) particles via non-covalent procedure as selective adsorbent for removal of Cloxacillin (CLO) antibiotic from aqueous and biological media (MILK). The effect of operational parameters includes pH (3-10), contact time (1-120 min), MIP (0.1 – 5.0 %wt) and adsorbent dosage (0.1- 2.0 g/L) was studied for optimization of CLO removal condition. The synthesized MIP particles and fabricated carbon composites were characterized using scanning electron microscopy and nitrogen absorption/desorption (BET). The results showed that the removal efficiency was highest in neutral conditions and increased as amount of MIP particles increased. The optimum conditions for removal of CLO (94%) were determined at pH = 6.5, 87 minutes as contact time and the 1.6 g/L carbon composite contain 3.1 % wt MIP. The performance of the synthesized composites was evaluated for Cloxacillin removal from the milk sample. The performance of the MIP particles for the Cloxacillin removal of milk samples supplied from livestock showed that these adsorbents can help to effectively reduce the residues of drug contamination in dairy samples. Manuscript profile -
Open Access Article
12 - Simulation of static and dynamic shear forces and vibrations for used milling ceramic tools
Parviz GhazviniyanShear tools with ceramic inserts are increasingly used in the machining of super alloys commonly used in the aerospace industry. Ceramic inserts produce higher cutting speeds due to higher thermal resistance compared to carbide inserts. But the success of this process i MoreShear tools with ceramic inserts are increasingly used in the machining of super alloys commonly used in the aerospace industry. Ceramic inserts produce higher cutting speeds due to higher thermal resistance compared to carbide inserts. But the success of this process is very sensitive to the correct choice of process parameters. In this study, analytical process models for attachment milling tools with round ceramic inserts are presented. These models can be used to determine shear parameters for optimal quality and maximum efficiency. First, the geometry of the implant shear margins was formulated under the effect of angles on the implants. An analytical shear force model was then developed. This allows the analysis of the effects of parameters on shear forces. A field time model has also been developed to analyze the dynamic shear forces and static limits for the milling process. After that, the models were implemented in the MATLAB GUI to facilitate the applications of the model in the industry. The shear correlation coefficients required to calculate the shear forces were identified from shear tests with Inconel718. Then the shear force model was validated with shear experiences. After obtaining the instrument model data through pulse test, the forces and dynamic shear vibrations were simulated by the time domain model. A series of simulations were performed to determine the static limits in some operating conditions using the time domain model and static edges were drawn for the tool under study. Manuscript profile -
Open Access Article
13 - A Preliminary Report on the Excavation in Late Neolithic Site of Maya Tepe; Buin Zahra, Qazvin
Mohammad Reza Rezaei Kallaj Hossein Davoudi Ebrahim SadeghiNowadays, constructive activities such as dam construction, villages and cities development and etc. are some of the main human factors in destroying many of archaeological sites. By the same token, during road construction in Buin Zahra- Sagz Abad, transit axis widenin MoreNowadays, constructive activities such as dam construction, villages and cities development and etc. are some of the main human factors in destroying many of archaeological sites. By the same token, during road construction in Buin Zahra- Sagz Abad, transit axis widening project in Qazvin province, southern parts of Maya tepe which have been located in road boundary would be destroyed. Therefore, urgent excavation of mentioned site was implanted in fall 1389 by an archaeological expert of cultural heritage organization of Qazvin city. Maya tepe is located in 5/5 km of the west of Buin Zahra City and in northern side of Buin Zahra- Sagz Abad axis and is an important site due to its particular location which is near to prehistoric sites of Qazvin plain such as Charbone, Zagheh, Ghabrestan and Sagz Abad. During the excavation in 10 trenches 2×2 meters and with preliminary researches about obtained results specially ceramic typology, within a semi-permanent settlement pattern, this site has a culture from late Neolithic I and early late Neolithic II (end of the first half of the sixth millennium BC), whose similar cultures in Qazvin plain have been identified in Charbone and Ebrahim Abad sites. In this paper, findings and results of an urgent excavation are presented and ultimately a comparative chronology of Maya Tepe is presented. Manuscript profile -
Open Access Article
14 - Late Bronze Age at Tepe Sagzabad in the Base of Pottery Evidence
Mohammad Hossein Azizi Kharanaghi Kamalaldin Niknami Nastaran MoradiThe Late Bronze age in Tepe Sagzabad without any relationship with previous pre-historic cultures in the region had been appeared suddenly in late second millennium BC. Handmade Monochrome and polychrome potteries (Uremia ware) is cultural indicator in this Period. Our MoreThe Late Bronze age in Tepe Sagzabad without any relationship with previous pre-historic cultures in the region had been appeared suddenly in late second millennium BC. Handmade Monochrome and polychrome potteries (Uremia ware) is cultural indicator in this Period. Our aimed to Trying Deportment of Archaeology, university of Tehran excavation in fall of 2009 at Tepe Sagzabad was recognition of cultural Layers of south part of this site and 3 different Trenches (6, 7 and 8) were dug. Trench 6 had different cultural Layers including: Iron Age I, Late Bronze age and Late Chalcolithic period. Between these Finds, Monochrome and polychrome potteries from Late Bronze age were remarkable. This Paper will focus on Typology, classification and introduces different kind of Late Bronze age pottery motif. Manuscript profile -
Open Access Article
15 - Preliminary Report on the Excavations at Site No. 11 of Talvar Dam Basin, Bijar, Kurdistan
Hamidreza Valipour Iman Mostafapour Reza Behdadfard Ghafour KakaWithin the irrigation of Talvar storage Dam, constructed on the river Talvar, a 30-kilometer-length lake would be created. Consequently, a large number of the archeological site would be flooded. Thus, it was necessary to perform some studies and discoveries around this MoreWithin the irrigation of Talvar storage Dam, constructed on the river Talvar, a 30-kilometer-length lake would be created. Consequently, a large number of the archeological site would be flooded. Thus, it was necessary to perform some studies and discoveries around this Basin. After recognizing and identifying the archeological sites, the discovering around the key areas and sites was started. Tel No. 11 was excavated with the basic aim of saving and achieving the archeological information. This site was excavated during one season through stratigraphy and in a horizontal way. In these excavations, some works of Chalcolithic and historical Parthian periods were obtained which paved the way for the possibility of performing some comparative studies as well as understanding cultural interactions in this area. With regards to the conducted comparisons, most of the cultural exchanges of Chalcolithic period in this area have been with Zanjan and Takestan regions. However, these infra-regional interactions with Dalma cultural areas in Central Zagros and NorthWest could be observed. The ceramics related to this area, in Parthian Period, reveal the features of Iran’s west region. Manuscript profile -
Open Access Article
16 - Developing an sensitive and selective method for determination of tetra- butyl benzoquinone in edible oils
H. Pourmadadkar N. Nasirizadeh S. Jafari M. DehghaniThe presence of trace amount of Tetra -butyl hydroquinone or its metabolite, Tetra -butyl benzoquinone (TBQ), may inhibit cell proliferation and cause biologic abnormalities due to the high prevalence of thiolate groups of proteins or cell walls. The aim of this study w MoreThe presence of trace amount of Tetra -butyl hydroquinone or its metabolite, Tetra -butyl benzoquinone (TBQ), may inhibit cell proliferation and cause biologic abnormalities due to the high prevalence of thiolate groups of proteins or cell walls. The aim of this study was to fabrication an electrochemical nanosensor based on molecular imprinted polymer to detection of TBQ in edible oil. This study was a methodologic study. The statistical population included edible oil samples containing TBQ. The effect of different factors such as amount of MIP and MWCNT for production of ceramic carbon electrodes as well as pH of preconcentration solution and the incubation time of the prepared nanosensor in the solution on the oxidation signal of TBQ was optimized by response surface methodology. Differential pulsed voltammetry has been used to determine the TBQ in oil samples. The Morphologies of MIP and prepared sensors were described by scanning electron microscopy. Optimal conditions for the separation and determination of TBQ in edible oil, including 10 mg of multiwall carbon nanotube, 30 mg of MIP for preparing a modified carbon ceramic electrode, and 8 minutes as incubation time in a 0.1 M phosphate buffer solution with pH 10 was obtained. The proposed method is capable of detecting TBQ in edible oil samples at a concentration range of 6 - 680 nM with a detection limit of 3.1 nM. Based on the results, the proposed sensor can be used as a suitable tool for determination of TBQ in edible oil samples in industries and laboratories. Manuscript profile -
Open Access Article
17 - Effect of Silicon Carbide and graphite additives on the pressureless Sintering mechanism and microstructural characteristics of Ultra-High Temperature ZrB2 Ceramics Composites
Mahdi Khoeini Mohammad Zakeri Ali Nemati Morteza Tamizifar Hamed Samadi -
Open Access Article
18 - Estimation of the mean grain size of mechanically induced Hydroxyapatite based bioceramics via artificial neural network
Mohammad Fahami Majid Abdellahi -
Open Access Article
19 - Immobilization of Glucose oxidase on Meso-porous Glass-ceramic with the Skeleton of CaTi4(PO¬4)6
Mojtaba Ahmadi Mohammad Rezvani Shabnam Shoa Bargh Mohammad Sadegh Shakeri Afzal Karimi -
Open Access Article
20 - Corrosion Properties of 70SiO2-15TiO2-15ZrO2 Ceramic Membrane
Maryam Shojaie Bahaabad Ehsan Taheri Nassaj Kavoos Falamaki Ali Zakeri -
Open Access Article
21 - Synthesis of nano-structured sphene and mechanical properties optimization of its scaffold via response surface methodology
Amirmostafa Amirjani Masoud Hafezi Ali Zamanian Mana Yasaee Noor Azuan Abu Osman -
Open Access Article
22 - Pore surface fractal dimension of sol-gel derived nanoporous SiO2-ZrO2 membrane
maryam shojaie bahaabad -
Open Access Article
23 - Investigation of the Factors Affecting on the Granulation of ZrB2 Nano-Particles Synthesized by Using Na Metal as Reductant
mehdi emamalizadeh Mohammad Mahdavi Arash Shokrolahi -
Open Access Article
24 - Delamination Detection in a Laminated Carbon Composite Plate Using Lamb Wave by Lead-Free Piezoceramic Transducers
Mohamad Hossein ataei Seyed Ali Hassanzadeh-Tabrizi Mahdi Rafiei Ahmad Monshi -
Open Access Article
25 - Design and Fabrication of Bone Scaffold Using Ceramic Composite Filament by 3D Printer
Hamideh Soleymani asl Fatemeh Kalantarzadeh Mina Alafzadeh Mojdeh Azizi Mahyar Soheily -
Open Access Article
26 - Fabrication and charge modification of ceramic membranes using copper Nanoparticles for desalination
Mohamad Mahdi Zerafat Majid Shokri Doodeji Omid Nejadian -
Open Access Article
27 - Survey and Evaluation of Merwinite (MW) as a New Nanobioceramic Powder
hassan gheisari -
Open Access Article
28 - Synthesis of forsterite as a novel nano powder ceramic materials
hassan gheisari dehsheikh -
Open Access Article
29 - Macro-and micromechanical modelling of HA-Elastin scaffold fabricated using freeze drying technique
Matin Mohammadzadeh Rad Saeed Saber-Samandari Mojtaba Sadighi Lobat Tayebi Mohammad Mohammadi Aghdam Amirsalar Khandan -
Open Access Article
30 - Macro-and micromechanical modelling of HA-Elastin scaffold fabricated using freeze drying technique
Matin Mohammadzadeh Rad Saeed Saber-Samandari Mojtaba Sadighi Lobat Tayebi Mohammad Mohammadi Aghdam Amirsalar Khandan -
Open Access Article
31 - Optimization of nitrate removal from aqueous solutions using clinoptilolite /CoFe2O4 by surface response methodology
Hassan Gheisari Ebrahim Karamian Ali Soheily -
Open Access Article
32 - Fabrication and Charge Modification of Ceramic Membranes Using Copper Nanoparticles for Desalination
Majid Shokri Doodeji Mohamad Mahdi Zerafat Omid Nejadian -
Open Access Article
33 - Synthesis and Characterization of forsterite nanopowder ceramic via mechanical activation
Hassan GHEISARI -
Open Access Article
34 - Peak Electric Load and Related Damages Reduction with the Use of Cooling Ceramics
A. SharifYazdi‎ J. Mirjalili‎ S. Salehi -
Open Access Article
35 - Application of Kansei engineering and data mining in the Thai ceramic manufacturing
Chaiwat Kittidecha Koichi Yamada -
Open Access Article
36 - Combined Porcelain Ceramic and Recycled Concrete Aggregates Used as Replacement for Coarse Aggregates in Concrete
Sayed Behzad Talaeitaba Maedeh Dehghani -
Open Access Article
37 - Evaluation of hot coating method to make the composite ceramic membran
شهرام قنبری پاکدهی الهام رحیمی کوروش شفیعیThe use of membrane has very specific role in the separation processes such as gas separation and dehydration of the azeotropic feed. The most important step in any membrane process is selection of the membrane material and its fabrication. The ceramic membrane has been MoreThe use of membrane has very specific role in the separation processes such as gas separation and dehydration of the azeotropic feed. The most important step in any membrane process is selection of the membrane material and its fabrication. The ceramic membrane has been more attracted due to sufficient strength, thermal, and chemical stabilities. The ceramic membrane is a composite membrane containing three layers. The first layer is a macroporous support, the second layer is a mesoporous support, and the third layer is silica with micropores which plays a key role in the separation process. Therefore, the quality and uniformity of the third layer is so important that increases directly the efficiency of the separation process. In this article, a method has been presented in which the defects of silica are reduced. In this method, known as hot-coating, the support was heated before all usual coating. Reduction in gaps or defects and increase in continuity or uniformity of the silica layer was observed from SEM analysis. On the other hand, comparing the results of gas permeability test through hot coating and usual coting revealed that the exit gas flow rate was reduced significantly in hot coating. According to reduction in thickness of the silica layer, the decrease in exit gas flux is attributed to increase in continuity and reduce in defects of the layer. So, the continuous or uniform silica layer is obtainable via hot coating through fewer coating steps than usual coating Manuscript profile -
Open Access Article
38 - Mythological Analysis of the Story of Bahram & Azadeh Based on Northrope Frye’s Theory of Mythos of Fall; The Case of Study: Enameled Ceramics of Ilkhanid Period
yaqub talebi Bahman namvar motlaghOne of the main approaches in contemporary literary criticism is the archetypal approach. Northrop Frye, The foremost theorist of archetypal criticism, argues that the mythological archetypes appear in a variety of literary texts and the corresponding genres for the fou MoreOne of the main approaches in contemporary literary criticism is the archetypal approach. Northrop Frye, The foremost theorist of archetypal criticism, argues that the mythological archetypes appear in a variety of literary texts and the corresponding genres for the four seasons are as follows: The mythos of spring: comedy; The mythos of summer: romance; The mythos of fall: tragedy; The mythos of winter: irony. Frye believes the tragedy focuses on a single hero who passes through the six phases - from innocence to falling - in his/her life and finally calm prevails in the atmosphere. The present article, by a descriptive and analytical approach, attempts to study the motifs of enameled ceramics of Ilkhanid period based on Northrope Frye’s theory of archetypal criticism. These motifs depict scenes from the story of Bahram & Azadeh (as narrated in Shāhnāmeh). The results show that the visual narrative of the story is based on the form of the mythos of fall and the genre of tragedy and convey a special political and social message to its audience. Manuscript profile -
Open Access Article
39 - Bio-remediation of sulfuric compounds from the ceramic wastewater using indigenous bacteria and Thiobacillus thioparus
Mahtab Taherian Fatemeh Ardestani Mehdi ParviniBackground & Objectives: Sulfide compounds of ceramic industries wastewater cause water pollution as well as plants and aquatic destruction. This study was aimed to evaluate sulfide compounds removal from ceramic industries wastewater by Thiobacillus thioparus MoreBackground & Objectives: Sulfide compounds of ceramic industries wastewater cause water pollution as well as plants and aquatic destruction. This study was aimed to evaluate sulfide compounds removal from ceramic industries wastewater by Thiobacillus thioparus and indigenous wastewater bacterial isolates. Materials & Methods: Indigenous bacterial strains were proliferated at pH of 7, the temperature of 25oC, agitation speed of 200 rpm and an aeration rate of 100 mL min-1 in a 2 L bioreactor for 15 consecutive cycles. Sulfide compounds removal function of T. thioparus and indigenous bacterial strains along with the effect of pH and initial sulfide concentrations were investigated. Results: The results showed a thiosulfate removal rate of 250 mg sulfide L-1 h-1, a thiosulfate conversion percentage of 100% and a thiosulfate oxidation time of 44 min following 8 consecutive cycles. The sulfide removal rate of T. thioparus and ceramic wastewater indigenous bacteria was obtained as 246.5 and 276.5 mg sulfide L-1 h-1, respectively. Sulfide removal rate by proliferated bacteria decreased from 250 at pH of 7 to 230 and 180 mg sulfide L-1 h-1 at pH of 8 and 9, respectively. Bacterial isolates had an acceptable function in sulfide concentration of 3000 mg L-1, as well. Sulfide removal ability of T. thioparus isolates was decreased by 2.5 and 4 folds, when pH changed from 7 to 8 and 9, respectively. This bacterial strain was not able to tolerate high sulfide concentrations. Conclusion: The results showed that bacteria isolated from ceramic industries wastewater have a higher capability of sulfide compounds removal as compared to T. thioparus isolates. Manuscript profile -
Open Access Article
40 - Investigation of Released Cadmium and Lead from Different Colors of Over Glaze Designs to Food Stuff in Different Conditions
H. Hashemi-Moghaddam -
Open Access Article
41 - Investigation on leakage and chemical interaction of BaO–SiO2–B2O3 based glass-ceramic sealants and AISI430 interconnect
laila RezazadehIn the present work, adhesion, leak rate and chemical compatibility of a series of borosilicate-based glasses, belong to ternary BaO–SiO2–B2O3 system, with AISI 430 alloys as interconnect were investigated for solid oxide fuel cell applications. Deformation MoreIn the present work, adhesion, leak rate and chemical compatibility of a series of borosilicate-based glasses, belong to ternary BaO–SiO2–B2O3 system, with AISI 430 alloys as interconnect were investigated for solid oxide fuel cell applications. Deformation behaviors of selected glasses at sealing temprature with time were characterized. Significant deformation was not appeared in the samples overtime at sealing temperature. In the next step, the leakage tests of AISI430/glass-ceramics couples were performed. Glass containing 32 % molar BaO (Ba32) had no gas leakage; a low leak rate of 10-7 to 10-8 Pam3s-1 was obtained for the glass with 37 % molar BaO (Ba37) and big leak of the system (10-3 to 10-4 Pam3s-1) for Ba42. Possible interfacial reactions between the as-received glass and cell ingredients and aging up to 100 h were also studied by scanning electron microscopy in conjunction with energy-dispersive X-ray spectroscopy and X-ray dot mapping. The results showed the Ba32 and Ba37 glasses coupled with AISI430 had fine adhesion, remained stable under these conditions and were compatible with the interconnect. So, the use of these glass-ceramics will be successful in joining the ceramic electrolytes to the metallic interconnect. Manuscript profile -
Open Access Article
42 - Investigation of the factors affecting the foam ability of SiO2-Al2O3-MgO-CaO glass
سوسن هاشمی نیاIn the present work, Foaming and crystallisation behaviors of compacted glass powders based on a diopside glass-ceramic composition were investigated through the sintering route. The foaming agent was 2wt.%SiC particles.The results indicated that the lack of foaming of MoreIn the present work, Foaming and crystallisation behaviors of compacted glass powders based on a diopside glass-ceramic composition were investigated through the sintering route. The foaming agent was 2wt.%SiC particles.The results indicated that the lack of foaming of the base glass was due to high softening point and crystallization tendency . Therefore the effect of PbO and B2O3 on the foaming ability of glasses was investigated. According to our finding, addition of PbO improved foaming ability ,via improving wettability of glass - SiC particles,increasing of optical basicity and widening the temperature interval between dilatometric softening point and the onset of crystallization temperature. The glass- SiC wetting angle was decreased from 85° for the lead-free glass to 55° for the glass that contains 15 wt.% PbO. While with addition of B2O3, foaming ability of base glass in spite of widened the temperature interval between the dilatometric softening point and the onset of crystallisation wasn’t improved. Manuscript profile -
Open Access Article
43 - Investigation of bonding mechanism and effects of brazing time on microstructure and bond strength of Ti6Al4V/Al2O3 Couple
محمد حسین مومن پور محمود فاضل نجف آبادیIn this study, using Ag-Cu brazing metal alloy, effects of brazing time on microstructure and strength of Al2O3 / Ti6Al4V joints were investigated. Therefore, ceramic/metal couple brazed by electrical furnace. Then, brazed specimens were examined by scanning electron mi MoreIn this study, using Ag-Cu brazing metal alloy, effects of brazing time on microstructure and strength of Al2O3 / Ti6Al4V joints were investigated. Therefore, ceramic/metal couple brazed by electrical furnace. Then, brazed specimens were examined by scanning electron microscope and x-ray diffraction tests. Several phases observed at the interface area and EDS analysis were recognized titanium, copper, silver, aluminum, vanadium and oxygen in this phases. With more study using x-ray diffraction patterns and phases diagrams some intermetallic compounds identified. This compounds were Ti-Cu intermetallices near to Ti6Al4V side and reactive layer of Cu2O +CuAlO2 near to Al2O3 ceramic side. Also, microstructural surveys revealed the narrow reaction layer and a little intermetallic compounds in specimen brazed for 10 minutes. With increasing brazing time, reaction layers grossed rapidly. This chemical variation made dimensional changes at metal/ceramic interface. Therefore, some crakes observed in specimen brazed for 25 minutes. Maximum of shear strength equal 295 Mpa measured in specimen brazed for 15 minutes. Manuscript profile -
Open Access Article
44 - Investigation on microstructure, mechanical properties and pressureless sintering behavior of ZrB2-SiCnano/micron composites
زینب نصیری مهری مشهدیIn the present paper, ZrB2-SiC was developed by pressureless sintering method and SiC powder at nano and micro-sized scale was used as reinforcement phase. In order to produce composite samples, the primary powders were milled and blended in planetary ball mill apparatu MoreIn the present paper, ZrB2-SiC was developed by pressureless sintering method and SiC powder at nano and micro-sized scale was used as reinforcement phase. In order to produce composite samples, the primary powders were milled and blended in planetary ball mill apparatus with rotational speed of 200rpm and then processed using hot pressing (70ᵒC and 70MPa), cold isostatic press (200MPa), Pyrolysis (1000ᵒC) and sintering (2150ᵒC). The values of relative density and porosity of samples were measured to evaluate the effect of presence of micro-sized SiC and SiC nano particles simultaneously on the pressureless sintering behavior of ZrB2-SiC. In order to compare the microstructure and mechanical properties of samples Scanning Electron microscopy (SEM), equipped with EDS spectroscopy, XRD analysis, hardness and toughness tests were used. The results show that as the volume percentage of nano SiC decreases to 15 vol.%, the hardness, toughness, relative density and shrinkage initially increase and then decrease. Manuscript profile -
Open Access Article
45 - Investigation of the Ways of Purification of Apatite Stone and Its using in the Ceramic Glazes
Davoud Ghahremani صاحبعلی منافی E. فرح بخش Fariborz ForohandehIn the current research, within purification of apatite stone of Bafg investigated its using in the formulation of white glaze of Single firing of fast fired Wall Tile (Monoporosa Tile). The results of the investigations done on the purificated apatite of Bafg determine MoreIn the current research, within purification of apatite stone of Bafg investigated its using in the formulation of white glaze of Single firing of fast fired Wall Tile (Monoporosa Tile). The results of the investigations done on the purificated apatite of Bafg determined that this matter showing good thermal stability under the temperature of 1400 degress centigerate and isn’t any unfavorabale element in its compositon for using in ceramic glaze formulations exception of iron. Nevereless the problem of low Thermal Expansion Coefficient of the white glazes of Monoporosa, The Dilatometry results of the glaze containing Apatite dictated higher Thermal Expansion Coefficient. The images of SEM showed both the safe adhering of glaze to engobe and increment of amount of insoluble fine particles of zircon in the base phase of glaze that with the safe results of colourimetry was the explanatory of increment of the whitness of current glaze. Also by considering the low price of this matter, it wills reduce the final price of glaze. Manuscript profile -
Open Access Article
46 - The Effect of Silicon Carbide Ceramic Nanoparticles on the Tribological Properties of SN500HVI Paraffinic Base Oil
Meisam Makkarian Elham AmeriThe effect of silicon carbide (SiC) nanoparticles on the tribological properties of the base oil was investigated by friction and wear tests. SiC nanoparticles were synthesized by sol-gel method and added to the base oil at various weight percentages of (0.25, 0.5, 1 an MoreThe effect of silicon carbide (SiC) nanoparticles on the tribological properties of the base oil was investigated by friction and wear tests. SiC nanoparticles were synthesized by sol-gel method and added to the base oil at various weight percentages of (0.25, 0.5, 1 and 5). To increase the stability of SiC nanoparticles in the base oil, the surface was modified using oleic acid. To characterize the morphology of SiC nanoparticles, the FT-IR, FESEM and XRD techniques were applied. This investigation was carried out in the base oil SN500HVI from Sepahan Oil Company, Iran. The friction and wear tests were performed on the mixture of SN500HVI/nanoparticles. The tribological properties of nanoparticles in base oil were investigated using pin on disc test according to ASTM G99 test method. Based on the results obtained by XRD, the average size of SiC was known to be less than 30 nm. The mixture of nanoparticles in base oil with concentrations of 0.25, 0.5 and 1 wt.% led to reduction of friction coefficient by 26%, 15%, and 4%, in comparison to pure base oil, respectively. This tribological behavior was due to adhesiveness of nanoparticles on involving surfaces. Furthermore, the topography of worn surfaces was analyzed using FESEM. The results illustrated that the nanoparticles can be an effective additives to improve the quality of lubricants in terms of reducing the friction and wear due to their proper physical properties such as suitable hardness, spherical shape and high specific surface area. Manuscript profile -
Open Access Article
47 - Investigation of rheological properties and stability of aqueous suspensions containing YSZ ceramic nanoparticles
Reza Pourshahsavari AMIRHOSSEIN YAGHTIN Navid HosseinabadiApplication of YSZ nanoceramic in liquid phase suspension as raw material in plasma coating process leads to thermal barrier coatings with more desirable properties. The key is to achieve a stable aqueous suspension containing these ceramic nanoparticles. In this resear MoreApplication of YSZ nanoceramic in liquid phase suspension as raw material in plasma coating process leads to thermal barrier coatings with more desirable properties. The key is to achieve a stable aqueous suspension containing these ceramic nanoparticles. In this research, the rheological properties and stability of YSZ nanoparticles in aqueous medium have been investigated. The type of dispersants added to the suspension and the chemical properties of the aqueous medium were studied as influential factors in the stability of the suspension containing by 30 weight percent. In order to characterize the properties, viscosity, zeta potential, NTU and TSI factor and sedimentation rate were performed and also the aging properties of different suspensions were studied over time. The results showed that the use of alpha terpineol dispersant with a concentration of 0.1 wt% in aqueous medium with a pH of 2.5 has led to an optimal suspension with optimum viscosity and stability conditions, defined as viscosities at 1.5 cp, zeta potential at 56 mV and Nephelometric turbidity units (NTU) 3680 were obtained. Microstructural study of the thermal barrier coating created by plasma spraying of the optimal suspension indicates the formation of a columnar structure that will have higher stability and strength properties in this type of coating. Manuscript profile -
Open Access Article
48 - Bubble absorption enhancement in water-based nanofluids using nickel oxide nanoparticles in the presence of surfactant
Danial Jafari Farsaani Elham AmeriTo solve the problems caused by the use of chemical solvents such as amine solutions and caustic solution, a single bubble adsorption tower was used to investigate the effect of water-based nanofluids with nickel oxide nanoparticles on the CO2 adsorption process. CO2 wa MoreTo solve the problems caused by the use of chemical solvents such as amine solutions and caustic solution, a single bubble adsorption tower was used to investigate the effect of water-based nanofluids with nickel oxide nanoparticles on the CO2 adsorption process. CO2 was introduced as single bubbles from the end of a column, and the mass transfer coefficients and adsorption rates were investigated. The results showed that nickel oxide nanoparticles are hydrophobic and the addition of surfactant to nanofluid increases the surface electric charge of nickel oxide nanoparticles and increases the surface polarity for gas absorption. In this way, carbon dioxide gas is absorbed on the surface of nanoparticles due to its very polar nature, and this phenomenon increased the amount of gas absorption in the nanofluid by 270% compared to the base fluid.The maximum mass transfer flux for adsorption of CO2 with nanofluids containing nickle oxide nanoparticles was observed in the weight fraction of nanoparticles of 0.1%. To investigate the effect of important parameters on the mass transfer process in a single bubble tower, the parameters of nanoparticle weight fraction, gas injection nozzle diameter, with different levels were investigated. Finally, an experimental relationship was presented to estimate the mass transfer coefficient of CO2 gas, which is a function of the flow regime and microscopic structure of nanoparticles. The results showed that the amount of computational error for the proposed model is less than 20% and this model can estimate the laboratory results with a suitable approximation. Manuscript profile -
Open Access Article
49 - Investigation of modern ceramics in bioelectrical engineering with proper thermal and mechanical properties
Sharif Heydari Ali Attaeyan Pegah Bitaraf Amir Mohammad Gholami Bahareh Kamyab Moghadas -
Open Access Article
50 - Investigating the Internal Structure of EFQM Excellence Model by Combined Approach Fuzzy Cognitive Mapping and Structural Equation Modeling in Ceramics and Tile Industries of Yazd
Seyed Heidar Mirfakhraddini davood endelib ardakani nasrin jamshidiIn today's competitive and complex world, it is absolutely essential to use a comprehensive and appropriate system such the EFQM excellence model in order to evaluate performance, identify strengths and weaknesses, and improve performance of organizations. Since no orga MoreIn today's competitive and complex world, it is absolutely essential to use a comprehensive and appropriate system such the EFQM excellence model in order to evaluate performance, identify strengths and weaknesses, and improve performance of organizations. Since no organization can reach its goals without paying attention to the relationship between components and the feedback, the purpose of this study is to quantitatively determine and confirm the feedback relationships and loops in EFQM model in ceramics and tile industries of Yazd. In this regard, a combination of two approaches is used fuzzy cognitive mapping and structural equation modeling. In the first step, 7 experts identify 22 relationships among 9 criteria of the EFQM model. In the second step, the accuracy of these relationships is tested by80 senior managers of ceramics and tile industries through two conceptual models. These models are formed based on two EFQM model principles namely the effect of enablers on the results and impact of the results on enablers in feedback, through learning, creativity, and innovation. Determination of the type and intensity of these relationships and quantitative verification helps managers to identify the strengths and weaknesses, introduce continuous improvement projects, and increase self-assessment scores in the above industries. Manuscript profile