%0 Journal Article
%T Effect of Cu Content on Dielectric Properties of BaTiO3/Cu CompositeCeramics
%A PUYong-Ping
%A XU Ning
%A WANG Bo
%A WU Hai-Dong
%A CHEN Kai
%J 无机材料学报
%D 2010
%I Science Press
%R 10.3724/sp.j.1077.2011.00175
%X The BaTiO3/Cu composite ceramics doped with Cuin the content range of 0―30 wt% were prepared by the solid―state reaction. Themicrostructure, percolation threshold and dielectric properties of ceramicswere investigated. The results show that the resistivity of BaTiO3/Cucomposite ceramic increases with Cu content decreasing and the relationshipbetween them has a non―linear downward trend at the percolation threshold ( x=25wt%), then the composite isgradually changing from insulator into conductor. The value of εr of BaTiO3/Cucomposites is raised with the increase of Cu content, and the maximal value is about9000 at 1 kHz at room temperature as Cu content of 30wt%. The dielectric lossof BaTiO3/Cu composites increases with the increasing Cu doping, butthen decreased with the increasing frequency, which is due to the reducing ofthe amount of space charge. The temperature coefficient is less than 5% in the temperaturerange from 25  to 115   , and the dielectric constant is provided with hightemperature stability.
%K BaTiO3/Cucompositespercolation theory dielectric properties
%U http://www.jim.org.cn/fileup/PDF/20110213.pdf