Doping Effect of Alkali Ions on the Microstructural and Electrical Properties of ZnO-Pr6O11-based Varistor Ceramics
The microstructural and electrical properties of ZnO-Pr6O11-based ceramics fabricated with 97.5mol% ZnO + 0.5mol% Pr6O11 + 1.0mol% Co3O4 + 0.5mol% Cr2O3 + 0.5mol% MNO3 (M =Li,Na,K,or Rb) were investigated.Scanning electron microscopy analysis revealed that the doping of alkali ions would inhibit the growth of ZnO grains in the as-prepared ZnO-Pr6O11-based ceramics,The addition of K+ ion showed the strongest effect.Through the analysis of electric field vs current density characteristics,it was found that the doping of Li+ into ZnO-Pr6O11-based ceramics would change the varistor into ohmic resistor,but the addition of Na+,K+ or Rb+ could improve the nonlinearity of the varistors,in which the addition of K+ resulted in the strongest improving effect.
ZnO varistor Pr6O11 Alkali ion Doping Electrical properties
Zhijian Peng Feng Jiang Hai Feng Xiuli Fu
School of Engineering and Technology,China University of Geosciences,Beijing 100083,China School of Science,Beijing University of Posts and Telecommunications,Beijing 100876,China
国际会议
景德镇
英文
213-218
2012-10-15（万方平台首次上网日期，不代表论文的发表时间）