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The Crystalline and Dielectric Properties of 0.38(Bi1−xLax)ScO3-0.62PbTiO3 Ferroelectric Ceramics

Published online by Cambridge University Press:  01 February 2011

Yi Chen ,
Dejun Lan ,
Qiang Chen ,
Zhuo Xu ,
Xi Yue ,
Dingquan Xiao  and
Jianguo Zhu
Yi Chen
Affiliation:
[email protected], Sichuan University, College of Materials Science & Engineering, China, People's Republic of
Dejun Lan
Affiliation:
[email protected], Sichuan University, College of Materials Science & Engineering, China, People's Republic of
Qiang Chen
Affiliation:
[email protected], Sichuan University, College of Materials Science & Engineering, China, People's Republic of
Zhuo Xu
Affiliation:
[email protected], Xi'an Jiaotong University, Electronic Materials Research Laboratory, China, People's Republic of
Xi Yue
Affiliation:
[email protected], Sichuan University, College of Materials Science & Engineering, China, People's Republic of
Dingquan Xiao
Affiliation:
[email protected], Sichuan University, College of Materials Science & Engineering, China, People's Republic of
Jianguo Zhu
Affiliation:
[email protected], Sichuan University, College of Materials Science & Engineering, China, People's Republic of
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Abstract

To investigate the effects of partially substitution of lanthanum for bismuth in the BiScO3-PbTiO3 (BSPT) ceramics, the 0.38(Bi1−xLax)ScO3-0.62PbTiO3 (BLSPTx) ceramics were prepared by using conventional solid state process. It was found that the partial replacement of lanthanum for bismuth do not affects the crystalline structure of the BSPT ceramics. With increasing of the lanthanum content, the grains of BLSPTx ceramics grown much bigger than those of BSPT ceramics when BLSPTx and BSPT ceramics were sintered at the same temperature. The temperature dependence of dielectric permittivity of BLSPTx ceramics shows that the Curie temperature (Tc ) shifts toward lower temperature with the increasing of lanthanum content, and the BLSPTx samples for x=0.02 show the highest value of the dielectric constant at T c.

Keywords

ferroelectricdielectric propertiescrystallographic structure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 888: Symposium V – Materials and Devices for Smart Systems II , 2005 , 0888-V09-09
Copyright
Copyright © Materials Research Society 2006

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