Diffuse phase transition and dielectric tunability of Ba(ZryTi1-y)O-3 relaxor ferroelectric ceramics

Chew, Khian Hooi and Chan, H.L.W. and Tang, X.G. (2004) Diffuse phase transition and dielectric tunability of Ba(ZryTi1-y)O-3 relaxor ferroelectric ceramics. Acta Materialia, 52 (17). pp. 5177-5183. ISSN 1359-6454, DOI https://doi.org/10.1016/j.actamat.2004.07.028.

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Barium zirconate titanate Ba(ZryTi1-y)O-3 (BZT, y = 0.2, 0.25, 0.30, 0.35) ceramics have been prepared by a sol-gel process. The temperature dependence of dielectric permittivity of the ceramics has been investigated. The results show that the phase transition temperature T-C (or T-m) is suppressed with increasing Zr content. The degree of diffuseness of the phase transition is more pronounced for higher Zr content, implying the existence of a composition-induced diffuse phase transition of the ceramics with 0.20 less than or equal to y less than or equal to 0.35. For BZT ceramics with y > 0.25, a relaxor ferroelectric characteristic is observed. High turtability and figure of merit are obtained in BZT compositions investigated, which imply that these ceramics are promising materials for tunable capacitor applications. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Item Type: Article
Additional Information: Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Bzt ceramic, Diffuse phase transition, Relaxor behavior, Electric field, Tunability, Thin-films, Behavior, Viscosity, Defects
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: Miss Malisa Diana
Date Deposited: 29 Jul 2013 02:38
Last Modified: 27 Aug 2019 07:34
URI: http://eprints.um.edu.my/id/eprint/8211

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