Optimization of parameters for tape casting of yttria stabilized zirconia (YSZ8) by Taguchi design for electrolyte solid oxide fuel cell
Subject Areas : journal of New Materialsسارا paydar 1 , M.H Shariat 2 , سیروس Javadpou 3
1 - دانشجو دکتری، دانشکده مهندسی، بخش مهندسی مواد
2 - استاد، دانشگاه شیراز، دانشکده مهندسی، بخش مهندسی مواد
3 - استاد، دانشگاه شیراز، دانشکده مهندسی، بخش مهندسی مواد
Keywords: Electrolyte, Tape Casting, Density, Taguchi Design,
Abstract :
In the present study, optimization parameters for the tape casting is studied to produce a Yttria-stabilized zirconia (YSZ8) thick films for using as solid electrolytes in solid oxide fuel cell (SOFC). Taguchi designed experimental procedure was used to consider the characteristics of the slurry, such as the percentage of solid phase, binder and the ratio of plasticizers to the binder. The results indicated that the percentage of solid-phase have the greatest influence on the slurry viscosity and green density. Therefore the slurry containing the maximum possible solid-phase with the proper percentage of binder and plasticizers which provides an acceptable viscosity, can be selected as the proper slurry. This slurry is used to produce a relatively dense tape which sintered at 1450°C for 2 h. The density of sintered tape was 97% of theoretical density. The ionic conductivity of the sintered sample was determined with impedance measurement in temperature range of 300 to 800oC. The measured conductivities were 1.088×10-5 Ω-1.cm-1 at 300oC and 2.27×10-2Ω-1.cm-1 at 800oC.
1- R. V. Wandekar, B. N. Wani, and S. R. Bharadwaj, “Crystal structure, electrical conductivity, thermal expansion and compatibility studies of Co-substituted lanthanum strontium manganite system,” Solid State Sci., vol. 11, no. 1, pp. 240–250, 2009.
2- T. Baquero, J. Escobar, J. Frade, and D. Hotza, “Aqueous tape casting of micro and nano YSZ for SOFC electrolytes,” Ceram. Int., vol. 39, no. 7, pp. 8279–8285, 2013.
3- B. Steele, “Fuel-cell technology: Running on natural gas,” Nature, vol. 400, no. August, pp. 619–621, 1999.
4- S. Ramanathan and M. B. Kakade, “Aqueous slurry processing of monolithic films for SOFC – YSZ, LSM and YSZ–NiO systems,” Int. J. Hydrogen Energy, vol. 36, no. 22, pp. 14956–14962, 2011.
5- M. Liu, D. Dong, R. Peng, J. Gao, J. Diwu, X. Liu, and G. Meng, “YSZ-based SOFC with modified electrode/electrolyte interfaces for operating at temperature lower than 650 °C,” J. Power Sources, vol. 180, no. 1, pp. 215–220, 2008.
6- M. Liu, Z. Liu, M. Liu, and L. Nie, “Fabrication and characterization of functionally-graded LSCF cathodes by tape casting,” Int. J. Hydrogen Energy, vol. 38, no. 2, pp. 1082–1087, 2013.
7- a. Kumar, P. S. Devi, and H. S. Maiti, “Effect of metal ion concentration on synthesis and properties of La0.84Sr0.16MnO3 cathode material,” J. Power Sources, vol. 161, no. 1, pp. 79–86, 2006.
8- G. J. Li, Z. R. Sun, H. Zhao, C. H. Chen, and R. M. Ren, “Effect of temperature on the porosity, microstructure, and properties of porous La0.8Sr0.2MnO3 cathode materials,” Ceram. Int., vol. 33, no. 8, pp. 1503–1507, 2007.
9- D. Hotza and P. Greil, “Review: aqueous tape casting of ceramic powders,” Mater. Sci. Eng. A, vol. 202, no. 1–2, pp. 206–217, 1995.
10- M. P. Albano and L. B. Garrido, “Aqueous tape casting of yttria stabilized zirconia,” Mater. Sci. Eng. A-Structural Mater. Prop. Microstruct. Process., vol. 420, no. 1–2, pp. 171–178, 2006.
11- L. H. Luo, A. I. Y. Tok, and F. Y. C. Boey, “Aqueous tape casting of 10mol%-Gd2O3-doped CeO2 nano-particles,” Mater. Sci. Eng. A, vol. 429, no. 1–2, pp. 266–271, 2006.
12- J. Gurauskis, C. Baudín, and a. J. Sánchez-Herencia, “Tape casting of Y-TZP with low binder content,” Ceram. Int., vol. 33, no. 6, pp. 1099–1103, 2007.
13- K. Do Kim, D. W. Choi, Y.-H. Choa, and H. T. Kim, “Optimization of parameters for the synthesis of zinc oxide nanoparticles by Taguchi robust design method,” Colloids Surfaces A Physicochem. Eng. Asp., vol. 311, pp. 170–173, 2007.
14- ر. معمارزاده، س. جوادپور و ف. پناهی، " بهینه سازی عوامل موثر بر اندازه نانو ذرات اکسید قلع به روش تاگوچی"، مجله مواد نوین، جلد 2، شماره 3، ص 11-20، بهار 1391.
15- M. Ghatee, M.H. Shariat, J.T.S. Irvine, “Investigation of electrical and mechanical properties of 3YSZ/8YSZ composite electrolytes,” Solid State Ionics, vol. 180, pp. 57–62, 2009.
_||_
