Influence of doped Ag⁺ on multifunction characteristics in SrTiO₃ ceramics

来源期刊：中国有色金属学报(英文版)2000年第1期

论文作者：徐庆 陈文 袁润章

文章页码：69 - 72

Key words：SrTiO₃ ceramics; capacitor-varistor multifunction; Ag⁺ doping

Abstract: SrTiO₃ capacitor-varistor multifunction ceramics is fabricated by a single-sintering process. The research is carried out, mainly aimed at the influence of the doped Ag⁺ on multifunction characteristics in SrTiO₃ ceramics and its mechanism. The results show that the density of grain-boundary acceptor state increases effectively due to the fact that Sr²⁺ on grain surface is substituted by doped Ag distributing at grain-boundary in form of Ag⁺ during the course of oxidizing annealing, which is proposed to be the fundamental reason for understanding the significant difference of both the dielectric properties and varistor properties in SrTiO₃ ceramics samples with various Ag⁺ contents.