Bi_2O_3气相热扩散及其工艺条件对SrTiO_3基多功能陶瓷性能的影响

The Effect of Vapor Phase Diffusion with Bi 2O 3 and Diffusion Conditions on the Electrical Properties of SrTiO 3 based Multi function Ceramics

研究了Ｂｉ２Ｏ３气相扩散及其热扩散工艺条件对半导化ＳｒＴｉＯ３基陶瓷的介电性能（ε）、介电损耗（Ｄ）、非线性系数（α）及电阻率（ρ）的影响，用ＳＥＭ和ＥＰＡ对微观结构进行了观察和分析，结果显示Ｂｉ２Ｏ３主要集中在晶界附近．用ＳｒＴｉＯ３气相扩散法成功地获得了εａｐｐ＞５００００，Ｄ＜０．０１，α＞６．０，ρ＞５×１０１０Ω·ｃｍ的ＳｒＴｉＯ３基多功能陶瓷．

It was studied that the effect of vapor phase diffusion with Bi 2O 3 on electrical properties of SrTiO 3 based Multi function Ceramics.The relationship between electrical properties,such as dielectric constant (ε),dielectric loss (D),non linear coefficient (α) and electric resistivity (ρ),and diffusion conditions was discussed.Microstructure was investigated by SEM.The distributions of element was examined by EPA.The results show that Bi 2O 3 deposit most at grain boundary.The prepared ceramics have good electrical properties (ε>50000,D<0.01,α>6.0,ρ>5×10 10 Ω·cm).