Dielectric and impedance measurements on (1-x)Ba(Fe1/2Ta1/2) O3-xBa(Zn1/3Ta2/3)O3 ceramics

• Main Authors: Phatungthane,T., Rujijanagul,G., Pengpat,K., Eitssayeam,S., Tunkasiri,T., Cótica,L.F., Guo,R., Bhalla,A.S.
• Format: Article
• Published: Elsevier 2015
• Subjects: Physics and Astronomy (all); Materials Science (all)
• Online Access: http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84909641072&origin=inward; http://cmuir.cmu.ac.th/handle/6653943832/38798
• Institution: Chiang Mai University

© 2014 Elsevier B.V. All rights reserved. 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.