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Open Access Article
1 - Mixing rules and equation of effective permittivity of the medium having spherical inclusions in two different orientations of their basal planes for THz radiation emission
Tamanna Punia Hitendra Malik -
Open Access Article
2 - Dielectric, electro-optical and spectroscopic properties of silver doped zinc oxide-ferroelectric liquid crystal composite system
Kaushlendra Agrahari Sanjeev Trivedi Ram Awasthi Vivek Nautiyal Rakesh Sonker Rajiv Manohar -
Open Access Article
3 - Study of an argon dielectric barrier discharge reactor with atmospheric pressure for material treatment
Maryam Hosseinpour Akbar Zendehnam -
Open Access Article
4 - Investigation of Electromagnetic Properties and Microwave Absorption of Z-Type HexFerrite with Zinc Substitution
zinat mirzaei mohammad jazirehpour ahmad poorbafraniIn this research, the effect of different substitution quantities of zinc cations on electromagnetic and microwave absorption properties of Z-type barium hexaferrite with chemical composition of Ba3Co2-xZnxFe24O41 (x=0, 1.2, 1.3, 1.4, 1.5, 2) generated by high energy mi MoreIn this research, the effect of different substitution quantities of zinc cations on electromagnetic and microwave absorption properties of Z-type barium hexaferrite with chemical composition of Ba3Co2-xZnxFe24O41 (x=0, 1.2, 1.3, 1.4, 1.5, 2) generated by high energy milling method was studied. X-ray diffraction (XRD) method was used to verify the formation of Z type Ba-hexaferrite phase in the synthesis conditions. Magnetization properties of different compositions were studied by alternative gradient force magnetometery (AGFM). X-ray diffraction (XRD) method was used to confirm the formation of Z-type Ba-hexaferrite phase. The investigations by AGFM showed that the amount of magnetization increased by substituting the desired composition. So that the amount of magnetization (67 emu/g) for an unsubstituted sample will reach its maximum (84 emu/g) for the sample with composition of . In addition, complex permeability and permittivity coefficients of the samples were studied by vector network analyzer (VNA). Using the measured coefficients, reflection loss curves were plotted. The results of the reflection loss (RL) plots showed that, on average, the maximum absorption bandwidth occurred among the samples at a frequency range of 4-8 GHz. The best absorption (the most negative reflectance loss) was observed at -47 dB and at a frequency of 7 GHz for the sample with an index of substitution of x=1.3. Manuscript profile -
Open Access Article
5 - The Effect of Gd Cation Substitution on the Structural and Electromagnetic Properties of Z-Type Barium Hexaferrite
Mohammad Jazirehpour Ahmad Poorbafrani Zinat MirzaeiThe effect of gadolonium cation substitution on the structural and electromagnetic properties of Z-type barium hexaferrite was investigated in this study. This group of compounds is known as Ba3Co2-xGdxFe24O41, and it was created using the energetic milling approach wit MoreThe effect of gadolonium cation substitution on the structural and electromagnetic properties of Z-type barium hexaferrite was investigated in this study. This group of compounds is known as Ba3Co2-xGdxFe24O41, and it was created using the energetic milling approach with substitution values of 0, 0.1, 0.3, 0.5, 0.8, 0.1, and 1.2. X-ray diffraction (XRD) analyses and scanning electron microscopy (SEM) photos of Ba3Co1.6Gd0.4Fe24O41 samples were obtained to investigate the phase formation temperature and the effect of particle size on the properties of this compound. A network vector analyzer was used to assess the real and imaginary components of the samples' electrical permittivity (ε) and magnetic permeability (μ) in order to evaluate their electromagnetic properties (VNA). Using these coefficients, reflection loss diagrams of the compounds were created in the frequency range of 1-18 GHz. By examining the samples in terms of maximum absorption intensity and bandwidth at the same time, the samples with Gd substitution with x = 0.5 in the frequency bands S and C1, the sample with x = 0.3 in the band C2, the sample with x = 0.3 in the X band, the sample with x = 0.1 in the X band, and the sample with x = 1.2 in the Ku band were chosen as the optimal samples (S: 1-2 GHz, C1: 2-4 GHz, C2: 4-8 GHz, X: 8-12 GHz, Ku: 12-18 GHz). Manuscript profile