Synthesis and Dielectric Properties of Submicron CaTiO_3 Powders by Mechanical Ball-milling Method  

作　　者：王焕平 

机构地区：[1]College of Materials Science and Engineering,China Jiliang University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2007年第B12期837-840,共4页武汉理工大学学报（材料科学英文版）

基　　金：Supported by Zhejiang Province Key Science and Technical Program (No.2006C11119)

摘　　要：The synthesis and dielectric properties of calcium titanate （CaTiO3） submicron powder synthesized by mechanical ball-milling method have been investigated in this paper. With the ball-milling time increased, the size of CaTiO3 particles decreased from micron to submicron, and a great deal of nanoparticles （50-100 nm） occurred. The CaTiO3 ceramics made from submicron powders achieved compact structure at the sintering temperature of 1 250℃, and had good dielectric properties： εr=171, Q×f= 4 361 GHz, τf =＋782 ppm/＋C, IR=6.5×10^12Ω, which was a similar result compared with the CaTiO3 ceramics made from nanoparticles by sol-gel method.The synthesis and dielectric properties of calcium titanate （CaTiO3） submicron powder synthesized by mechanical ball-milling method have been investigated in this paper. With the ball-milling time increased, the size of CaTiO3 particles decreased from micron to submicron, and a great deal of nanoparticles （50-100 nm） occurred. The CaTiO3 ceramics made from submicron powders achieved compact structure at the sintering temperature of 1 250℃, and had good dielectric properties： εr=171, Q×f= 4 361 GHz, τf =＋782 ppm/＋C, IR=6.5×10^12Ω, which was a similar result compared with the CaTiO3 ceramics made from nanoparticles by sol-gel method.

关 键 词：CATIO3 submicron powder dielectric properties 

分 类 号：TB383.3[一般工业技术—材料科学与工程]