SrTiO_3双功能陶瓷的施主掺杂研究  

DONOR DOPING BEHAVIOR IN SrTiO_3 CAPACITOR-VARISTOR CERAMICS SINTERED IN STRONGLY REDUCING ATMOSPHERE

作　　者：李建英[1] 李盛涛[1] 庄严[2] 

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室 [2]广州通信研究所

出　　处：《材料研究学报》2000年第2期193-197,共5页Chinese Journal of Materials Research

摘　　要：研究了２５％Ｎ_２＋７５％Ｈ_２（体积分数）强还原烧结气氛下施主添加剂 Ｎｂ_２Ｏ_ ５、Ｌａ_２Ｏ_３对ＳｒＴｉＯ３双功能陶瓷半导化的作用规律，结果表明随着添加量的增大， Ｎｂ_２Ｏ_５掺杂试样的表观电阻率单调下降，而 Ｌａ_２Ｏ_３掺杂试样的表观电阻率呈“ Ｕ”形曲线．研究了在 Ｌａ_２Ｏ_３高、低两种添加量下，烧结温度对半导化的作用规律，实验结果表明随着烧结温度的升高，高掺杂试样的表观电阻率逐渐上升，而低掺杂试样逐渐下降．在ＸＲＤ、ＩＲ、ＰＡＴ等现代测试手段分析的基础上。The effects of Nb_2O_5 and La_2O_3 donor additions in SrTiO_3 double function ceramics sintered in strongly reducing atmosphere were experimentally studied. It was shown that with an increase of addition, the apparent resistivity of Nb_2O_5-doped sample decreased monotonically and that of La_2O_3-doped samples showed a U-type curve. The efFect of sintering temperature on semiconducting under the conditions of high and low La_2O_3 additions was also studied. It was shown that with an increase of sintering temperature, the apparent resistivity of high-doped samples increased while that of low-doped samples decreased. The experimental results have been explained on the basis of XRD. IR and PAT results.

关 键 词：SrTiO3陶瓷 施主掺杂 半导化 

分 类 号：TM283[一般工业技术—材料科学与工程] TN304.82[电气工程—电工理论与新技术]