Dielectric and impedance measurements on (1−x)Ba(Fe1/2Ta1/2)O3-xBa(Zn1/3Ta2/3)O3 ceramics |
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| Authors: | Thanatep Phatungthane Gobwute Rujijanagul Kamonpan Pengpat Sukum Eitssayeam Tawee Tunkasiri Luiz F Cotica Ruyan Guo Amar S Bhalla |
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| Institution: | 1. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;2. Department of Physics, State University of Maringá, Maringá 87020-900, Brazil;3. Department of Electrical and Computer Engineering, University of Texas at San Antonio, TX 78249, USA |
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| Abstract: | In this work, ((1−x)Ba(Fe1/2Ta1/2)O3-xBa(Zn1/3Ta2/3)O3), ((1−x)BFT-xBZT) ceramics with x = 0.00–0.12 were synthesized by the solid–state reaction method. X-ray diffraction data revealed that both the powders and ceramics were of a pure-phase cubic perovskite structure. All ceramics showed large dielectric constants. For the x = 0.12 sample, a very high dielectric constant (>20,600) was observed. A lowering in the dielectric loss compared to pure BFT ceramics was observed with the BZT addition. The impedance measurements indicated that BZT has a strong effect on the bulk grain and grain boundary resistance of BFT ceramics. These results are in agreement with the measured dielectric properties. Based on dielectric and impedance results, (1−x)BFT-xBZT ceramics could be of great interest for high performance dielectric materials applications due their giant dielectric constant behavior. |
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| Keywords: | BaFe1/2Ta1/2O3 Ceramics Perovskite Giant dielectric constant Impedance spectroscopy |
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