Dielectric relaxation in (Ba0.7Ca0.3)TiO3-Ba(Zr0.2Ti0.8)O3 ceramics

被引：1
|
作者：
Ju, S. G. [1 ]
Tang, X. G. [1 ]
Wu, J. B. [1 ]
Jiang, Y. P. [1 ]
Liu, Q. X. [1 ]
机构：
[1] Guangdong Univ Technol, Guangzhou Higher Educ Mega Ctr, Sch Phys & Optoelect Engn, Guangzhou 510006, Guangdong, Peoples R China
来源：
APPLICATIONS OF ENGINEERING MATERIALS, PTS 1-4 | 2011年 / 287-290卷
关键词：
Ceramics; (Ba; Ca)TiO3; Ba(Zr; Ti)O-3; Dielectric properties; Relaxation; Polar nanoregions; THIN-FILMS; PHASE-TRANSITION; BEHAVIOR;
D O I：
10.4028/www.scientific.net/AMR.287-290.503
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, effect of low sintering temperature and time on the new lead-free perovskite (Ba0.7Ca0.3)TiO3-Ba(Zr0.2Ti0.8)O-3 (BCZT) solid solution ceramics have been investigated. X-ray diffraction (XRD) was used to understand the phase transition of the BCZT during heating. The Curie temperature decreased nonlinearly 43 K in BCZT ceramics. Diffuse phase transitions were observed in BCZT ceramics and the Curie-Weiss exponent (CWE) was nearly 2. The dielectric permittivity versus temperature characteristics and the gamma in the modified Curie-Weiss law, as a function of the dc bias field was obtained for BCZT ceramics. The fitting of parameters (T(m)vs.f) have close agreement with the data of Vogel-Fulcher's relationship.
引用
收藏
页码：503 / 508
页数：6
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