Anisotropic Ferro- and Dielectric Properties of TexturedBi4Ti3O12 Ceramics Prepared by the Solid-State Reaction Based on Multiple Calcination

Advances in Materials Science and Engineering

Research Article

Xiaobing Chen¹  Hui Sun¹  Wei Wang¹  XiangyuMao¹ 

[1] College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China, yzu.edu.cn

Others  :  1266463
DOI  :  10.1155/2010/398590

 received in 2010-07-03, accepted in 2010-10-13,  发布年份 2010

【 摘 要 】

The grain-oriented Bi4Ti3O12 (BIT) samples were prepared by the solid-state reaction method with a multicalcination process. The grain-oriented BIT samples exhibit anisotropic structural, ferroelectric, piezoelectric, and dielectric properties. The remanent polarization (2Pr) and the piezoelectric constant (d33) of a/b- and c-direction BIT ceramics are 49.5 μC cm−2, 22.2 pC N−1 and 6.7 μC cm−2 6.9 pC N−1, respectively. The dielectric anomalies of samples are observed around 157 K and 232 K. The dielectric anomalies at around 157 K are related to oxygen vacancies. The activation energy of the dielectric relaxation of this anomaly is estimated to be 1.36 eV. Another dielectric anomaly at around 232 K is related to polarizable domains and the viscous motion of domain walls.

【 授权许可】

CC BY   
Copyright © 2010 XiangyuMao et al. 2010

【 图 表 】

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