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Sintering and Dielectric Properties of SrTiO3-based Ceramics

Published online by Cambridge University Press:  21 March 2012

Juan Li ,
Dengren Jin ,
Lixin Zhou  and
Jinrong Cheng
Juan Li
Affiliation:
School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, People’s Republic of China. State Key Lab of Silicon Materials, Zhejiang University, Hangzhou, 310027, People’s Republic of China.
Dengren Jin
Affiliation:
School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, People’s Republic of China. State Key Lab of Silicon Materials, Zhejiang University, Hangzhou, 310027, People’s Republic of China.
Lixin Zhou
Affiliation:
School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, People’s Republic of China. State Key Lab of Silicon Materials, Zhejiang University, Hangzhou, 310027, People’s Republic of China.
Jinrong Cheng
Affiliation:
School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, People’s Republic of China.
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Abstract

High dielectric tunability, low dielectric loss tangent and appropriate level of dielectric constant are the basic requirements for applications as electrically tunable dielectric microwave devices. In our experiments, the SrTiO3 green compacts made of the powder mixtures with various particle sizes were infiltrated with a BaTiO3 precursor solution and sintered at different temperatures between 1280 and 1350 ºC for 2 hours and 1350 ºC for 6 hours. The sintering, microstructural and dielectric properties were investigated. Results showed that the relative density of SrTiO3 ceramics could reached 93% when sintered at 1280 ºC for 2 hours. When sintered for 6 hours at 1350 °C, the room temperature dielectric constant of SrTiO3 reaches 900 at a frequency of 1MHz. It has only weak temperature dependence between 100 and 500K. The reason of the low sintering temperature for the dense SrTiO3 ceramics and the effects of sintering scheme on the dielectric properties from 100 K to 500 K are discussed in this paper.

Keywords

dielectric propertiesmicrostructureceramic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1397: Symposium P – Ferroelectric and Multiferroic Materials , 2012 , mrsf11-1397-p13-42
Copyright
Copyright © Materials Research Society 2012

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