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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 287-290Dielectric Relaxation in (Ba0.7Ca...

Dielectric Relaxation in (Ba_0.7Ca _0.3)TiO₃-Ba(Zr_0.2Ti _0.8)O₃ Ceramics

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Abstract:

In this work, effect of low sintering temperature and time on the new lead-free perovskite (Ba_0.7Ca_0.3)TiO₃-Ba(Zr_0.2Ti_0.8)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 (T_m vs. f ) have close agreement with the data of Vogel-Fulcher’s relationship.

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Periodical:

Advanced Materials Research (Volumes 287-290)

Pages:

503-508

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.287-290.503

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Online since:

July 2011

Authors:

Shao Gong Ju, Xin Gui Tang, Jun Bo Wu, Yan Ping Jiang, Qiu Xiang Liu

Keywords:

Ba(Zr,Ti)O₃, Ceramic, Dielectric Property, Polar Nanoregions, Relaxation

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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