无机材料学报

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共沉淀法制备掺杂氧化锌压敏陶瓷粉料热力学分析

彭忠东; 杨建红; 邹忠; 刘业翔; 李自强+   

  1. 中南工业大学冶金系, 长沙 410083; +四川联合大学西区化工系, 成都 610065
  • 收稿日期:1998-11-02 修回日期:1998-12-14 出版日期:1999-10-20 网络出版日期:1999-10-20

Thermodynamic Analysis on Preparing Doped Zinc Oxide Varistor Ceramic powders by Coprecipitation Process

PENG Zhong-Dong; YANG Jian-Hong; ZHOU Zhong; LIU Ye-Xiang, Li Zi-Qiang+   

  1. Department of Metallurgy; Central South University of Technology Changsha 410083 China; +Department of Chemical Engineering; Si Chuan Union University Chengdu 610065 China
  • Received:1998-11-02 Revised:1998-12-14 Published:1999-10-20 Online:1999-10-20

摘要: 本文通过对Me(Zn2+;Cr,Mn2+;Sb3+,Bi3+,Co2+)-NH-CO2--HO体系进行热力学分析的基础上,获得了Me-NH-CO2-O体系中的lg[T-pH关系图,得到了用NHHCO和NH·HO作沉淀剂,用共沉淀法制备掺杂氧化锌压敏陶瓷粉料时,最佳共沉淀pH为7.0左右.

关键词: 热力学分析, 共沉淀, 氧化锌, 压敏陶瓷

Abstract: Based on the thermodynamic analysis of Men+ (Zn2+, Cr3+ , Mn2+, Sb3+, Bi3+, Co2+)-NH3CO2---H2O systems, the curves about lg[M]T-pH of Mn+-NH3-CO32--H2O systems were obtained.It shows that the optimal pH is 7.0 to prepare doped zinc oxide varistor ceramic powders bycoprecipitation process, and the precipitants are NH4HCO3 and NH3.H2O.

Key words: thermodynamic analysis, coprecipitation, zinc oxide, varistor ceramics

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