Issue 24, 2004
From the journal:

Journal of Materials Chemistry

Lanthanum modified bismuth titanate prepared by a hydrolysis method

Yanmei Kan,a   Xihai Jin,a   Guojun Zhang,a   Peiling Wang,*a   Yi-Bing Chengb  and  Dongsheng Yana  

* Corresponding authors

a The State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, P. R. China
E-mail: plwang@sunm.shcnc.ac.cn
Fax: +86-21-52413122
Tel: +86-21-52412324

b School of Physics and Materials Engineering, Monash University, Clayton, Victoria, Australia

Abstract

La-modified bismuth titanate ceramics with compositions of Bi4−xLaxTi3O12 (x = 0, 0.2, 0.5, 0.75) were fabricated using powders prepared by a hydrolysis method. It was found that the partial substitution of lanthanum for bismuth in the Bi4Ti3O12 lattice significantly influenced the crystallization behavior, IR characteristics, and sinterability of the powder, as well as the microstructure and the dielectric properties of the sintered ceramics. The formation of the Bi2Ti2O7 intermediate phase during the powder crystallization process was suppressed, and the IR bands corresponding to Ti–O stretching vibrations were shifted to higher wavenumbers in La-modified bismuth titanate. With an increase in the doping level of lanthanum, the sintering temperature was steadily elevated, while the grain growth speed was reduced; and the dielectric property measurement indicated a continuous decrease in the Curie temperature and dielectric loss.

Graphical abstract: Lanthanum modified bismuth titanate prepared by a hydrolysis method

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Article information

DOI
https://doi.org/10.1039/B408149H
Article type
Paper
Submitted
28 May 2004
Accepted
06 Aug 2004
First published
04 Oct 2004

J. Mater. Chem., 2004,14, 3566-3570

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Lanthanum modified bismuth titanate prepared by a hydrolysis method

Y. Kan, X. Jin, G. Zhang, P. Wang, Y. Cheng and D. Yan, J. Mater. Chem., 2004, 14, 3566 DOI: 10.1039/B408149H

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