首页> 中文期刊> 《中南大学学报》 >Comparative characteristics of yttrium oxide and yttrium nitric acid doping in ZnO varistor ceramics

Comparative characteristics of yttrium oxide and yttrium nitric acid doping in ZnO varistor ceramics

         

摘要

The effect of different molar ratios of Y2O3 and Y(NO3)3 on the microstructure and electrical response of ZnO-Bi2O3-based varistor ceramics sintered at 1 000 °C was investigated, and the mechanism by which this doping improves the electrical characteristics of ZnO-Bi2O3-based varistor ceramics was discussed. With increasing amounts of Y(NO3)3 or Y2O3 in the starting composition, Y2O3, Sb2O4 and Y-containing Bi-rich phase form, and the average grain size significantly decreases. The average grain size significantly decreases as the contents of rare earth compounds of Y(NO3)3 or Y2O3 increase. The maximum value of the nonlinear coefficient is found at 0.16% Y(NO3)3 or 0.02% Y2O3 (molar fraction) doped varistor ceramics, and there is an increase of 122% or 35% compared with the varistor ceramics without Y(NO3)3 or Y2O3. The threshold voltage VT of Y(NO3)3 and Y2O3 reaches at 1 460 V/mm and 1 035 V/mm, respectively. The results also show that varistor sample doped with Y(NO3)3 has a remarkably more homogeneous and denser microstructure in comparison to the sample doped with Y2O3.

著录项

  • 来源
    《中南大学学报》 |2012年第8期|P.2094-2100|共7页
  • 作者单位

    ^pof;

    Materials;

    Science;

    and;

    Engineering,;

    Jiangsu;

    University,;

    Zhenjiang;

    222013,;

    China;

    ^pLaboratory;

    of;

    Semiconductor;

    Materials;

    Science,;

    Institute;

    of;

    Semiconductors,;

    Chinese;

    Academy;

    of;

    Sciences,;

    Beijing;

    100083,;

    China;

    ^pKey;

    Laboratory;

    of;

    Electrical;

    Insulation;

    and;

    Power;

    Equipment;

    (Xi'an;

    Jiaotong;

    University),;

    Xi'an;

    710049,;

    China;

    ^pEngineering;

    Research;

    Institute,;

    Jiangsu;

    University,;

    Changzhou;

    213000,;

    China;

    ^pKey;

    Laboratory;

    of;

    Inorganic;

    Synthesis;

    and;

    Preparative;

    Chemistry;

    (Jilin;

    University),;

    Changchun;

    130012,;

    China;

    ^pof;

    Chemistry,;

    Jilin;

    University,;

    Changchun;

    130012,;

    China;

  • 原文格式 PDF
  • 正文语种 CHI
  • 中图分类 TQ174.758;
  • 关键词

    压敏陶瓷; 电气特性; 酸掺杂; ZnO; 非线性电阻; 氧化钇; 平均晶粒尺寸; Y2O3;

相似文献

  • 中文文献
  • 外文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号