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Processing and Properties of Ferroelectric Bi4-x La xTi3O12 Ceramics

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Abstract:

Bi4-xLaxTi3O12 (BLT, x=0, 0.75, 1, 2) ceramic powders were prepared with sol-gel and solid phase reaction processes, respectively. BLT powders were synthesized after decarbonization at 300°C for 1h followed by calcination at 800°C for 2h. The ceramics synthesized with cold isostatic pressing and sintering at 1150°C exhibit a perovskite-like structure. The influence of sintering parameters and La doping content on density, microstructure and dielectric properties of the BLT were discussed. With the increase of La doping content in Bi4-xLaxTi3O12, dielectric constant increases and dielectric loss gradually decreases. The dielectric constant and dielectric loss of Bi4-xLaxTi3O12 (x=2) are 132.7 and 0.012 at 100 KHz, respectively.

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Periodical:

Key Engineering Materials (Volumes 368-372)

Pages:

106-108

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.368-372.106

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Online since:

February 2008

Authors:

Wen Wang, Hua Ke, Deng Guo Zhang, De Chang Jia, Yu Zhou

Keywords:

Bi4-xLaxTi3O12, Dielectric Constant, La Doping, Microstructure

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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