Phase Structure and Electrical Conduction of CaTi_(1−x)Sc_(x)O_(3−δ) Ceramics  

作　　者：ZHANG Qi-Long LIU Yang YANG Hui 张启龙;刘杨;杨辉(Department of Materials Science and Engineering,Zhejiang University,Hangzhou 310027;Department of Materials Science and Engineering,University of Sheffield,Mappin Street,Sheffield,S13JD,UK)

机构地区：[1]Department of Materials Science and Engineering,Zhejiang University,Hangzhou 310027 [2]Department of Materials Science and Engineering,University of Sheffield,Mappin Street,Sheffield,S13JD,UK

出　　处：《Chinese Physics Letters》2013年第1期212-214,共3页中国物理快报（英文版）

基　　金：Supported by the Ministry of Science and Technology of China through the National Key Technology Support Program(No 2009BAG12A07).

摘　　要：The electrical conduction of CaTi_(1−x)Sc_(x)O_(3−δ) ceramics is investigated by ac impedance spectra.A complete solid solution is formed,in which Sc(x≤0.17)substitutes for a Ti-site with the creation of oxygen vacancies.The samples of x≤0.1 contain two main resistances,the bulk resistance R1 and the grain boundary resistance R2.However,only R_(1) and a low-frequency'spike'representing charge build-up at the blocking metal electrodes are obtained for x≥0.15.CaTiO_(3) ceramics doped with Sc exhibits a relativly high electrical conductivity.With increasing x,bothσ_(1) and σ_(2) of CaTi_(1−x)Sc_(x)O_(3−δ) increase first,reach a maximum value at x=0.05,and then decrease to x≥0.1.

关 键 词：CERAMICS RESISTANCE 

分 类 号：TQ1[化学工程]