Dielectric Relaxation in (Ba0.7Ca 0.3)TiO3-Ba(Zr0.2Ti 0.8)O3 Ceramics

Abstract:

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In this work, effect of low sintering temperature and time on the new lead-free perovskite (Ba0.7Ca0.3)TiO3-Ba(Zr0.2Ti0.8)O3 (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 γ in the modified Curie-Weiss law, as a function of the dc bias field was obtained for BCZT ceramics. The fitting of parameters (Tm vs. f ) have close agreement with the data of Vogel-Fulcher’s relationship.

Info:

Periodical:

Advanced Materials Research (Volumes 287-290)

Edited by:

Jinglong Bu, Pengcheng Wang, Liqun Ai, Xiaoming Sang, Yungang Li

Pages:

503-508

DOI:

10.4028/www.scientific.net/AMR.287-290.503

Citation:

S. G. Ju et al., "Dielectric Relaxation in (Ba0.7Ca 0.3)TiO3-Ba(Zr0.2Ti 0.8)O3 Ceramics", Advanced Materials Research, Vols. 287-290, pp. 503-508, 2011

Online since:

July 2011

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$35.00

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