Yb掺杂(Ba,Sr)TiO_3系PTCR材料的研究Ⅱ.耐压特性

Investigation on Yb-Doped (Ba,Sr)TiO_3 PTCR Materials Ⅱ. Withstand Voltage Properties

本文建立了ＰＴＣＲ 材料的晶界、晶粒微观模型，采用单晶粒的耐压强度表征ＰＴＣＲ 材料的耐压性能。并进一步对Ｙｂ 掺杂的（Ｂａ ，Ｓｒ）ＴｉＯ３ 材料的耐压强度进行了研究。发现Ｙｂ 二次掺杂降低材料的耐压性能，Ｍｎ 二次掺杂提高材料的耐压性能。

A model of grain and grain boundary of PTCR materials was established in this paper.The withstand voltage of a single grain was induced to indicate the withstand voltage properties of grain boundary.The withstand voltage properties of Yb-doped (Ba,Sr)TiO 3 was investigated also.Yb doped after calcination reduces the withstand voltage property,Mn doped after calcination increases the withstand property.