标题：Dielectric Behavior of Barium Titanate/Carbon Fibers Composites
作者：Zhong Yang.Wang;Xin Yan.Li;Run Hua.Fan;Pei Tao.Xie
作者机构：Shandong University;Shandong University;Shangdong university;Shandong University;Shandong University;Shandong University;Shandon
来源：Materials Science Forum
关键词：AC Conductivity,Dielectric Property,Barium Titanate,Carbon Fiber
摘要：Conductor–insulator composites have been extensive researched for high dielectric constant. Most of them concentrated on metal polymers or metal ceramics. Barium titanate–carbon fibers composites were prepared by using a solid state reaction process with carbon fibers contents ranging from7 vol% to 23 vol%. Due to the high-aspect-ratio of carbon fiber, it was easy to produce a conducting network at much lower volume fraction. FESEM images illustrated that the carbon fibers influenced the densification and microstructure of the ceramics. Besides, addition of carbon fibers led to increase in dielectric permittivity, also had effects on the dielectric loss and ac conductivity. The dielectric and conductivity properties as a function of carbon fibers volume fraction were explained by the percolation theory.