Microwave sintering of Ca0.6La0.2667TiO3 microwave dielectric ceramics

Jia-mao Li; Tai Qiu

doi:10.1007/s12613-012-0546-x

Volume 19 Issue 3

Mar. 2012

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文章导航 > 矿物冶金与材料学报（英文版） > 2012 > 19(3) : 245-251. > DOI: 10.1007/s12613-012-0546-x

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Jia-mao Li, and Tai Qiu, Microwave sintering of Ca_0.6La_0.2667TiO₃ microwave dielectric ceramics, Int. J. Miner. Metall. Mater., 19(2012), No. 3, pp.245-251. https://dx.doi.org/10.1007/s12613-012-0546-x

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Microwave sintering of Ca_0.6La_0.2667TiO₃ microwave dielectric ceramics

Jia-mao Li^1,2),
Tai Qiu^1), ,

College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China
School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan 243002, China

基金项目:

This work was financially supported by A Priority Academic Program Development of Jiangsu Higher Education Institutions.

通信作者:
Tai Qiu E-mail: qiutai@njut.edu.cn

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中文摘要

Ca_0.6La_0.2667TiO₃ ceramics were prepared by conventional and microwave sintering techniques and their sinterability, microstructure, and microwave dielectric properties were investigated in detail for comparison. Densified Ca_0.6La_0.2667TiO₃ ceramics were obtained by microwave sintering at 1350℃ for 30 min and by conventional sintering at 1450℃ for 4 h. An unusual phenomenon was found that some larger grains (grain size range:8-10 μm) inclined to assemble in one area but some smaller ones (grain size range:2-4 μm) inclined to gather in another area in the microwave sintered ceramics. The microwave dielectric properties of Ca_0.6La_0.2667TiO₃ ceramics prepared by microwave sintering at 1350℃ were as follows:dielectric constant (ɛ_r)=119.6, quality factor (Qf)=17858.5 GHz, and temperature coefficient of resonant frequency (τ_f)=155.5 ppm/℃. In contrast, the microwave dielectric properties of the ceramics prepared by conventional sintering at 1450℃ were ɛ_r=117.4, Qf=13375 GHz, and τ_f=217.2 ppm/℃.

关键词:

Microwave sintering of Ca_0.6La_0.2667TiO₃ microwave dielectric ceramics

Jia-mao Li^1,2),
Tai Qiu^1), ,

Author Affilications

College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China
School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan 243002, China

Funds:
This work was financially supported by A Priority Academic Program Development of Jiangsu Higher Education Institutions.
Received: 22 March 2011; Revised: 22 May 2011; Accepted: 23 May 2011;

Abstract:

Keywords:

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