无机材料学报

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ZnO压敏陶瓷的微波烧结

康雪雅; 常爱民; 韩英; 王天雕; 陶明德; 涂铭旌+   

  1. 中国科学院新疆物理所; 乌鲁木齐 830011; +四川联合大学材料工程系; 成都610065
  • 收稿日期:1997-09-17 修回日期:1997-11-10 出版日期:1998-10-20 网络出版日期:1998-10-20

Microwave Sintering of ZnO Varistor Ceramics

KANG Xue-Ya; CHANG Ai-Min; HAN Ying; WANG Tian-Diao; TAO Ming-De; TU Ming-Jin+   

  1. Xinjiang Institute of Physics; Chinese Academy of Sciences Urumuqi 850011 China; +Department of Materials Engineering; Sichuan Unite University Chengdu 610065 China
  • Received:1997-09-17 Revised:1997-11-10 Published:1998-10-20 Online:1998-10-20

摘要: 对用纳米粉体制备的ZnO压敏生坯进行了微波烧结,通过XRD、SEM分析和电性能测试,与普通烧结比较,微波烧结可使ZnO压敏材料快速成瓷,显著缩短烧结时间;在相同晶粒尺寸下,微波烧结温度更低,瓷体更致密;并能获得较好电性能.微波烧结为ZnO压敏陶瓷材料制备提供了一条新的、高效节能的途径.

关键词: 微波烧结, ZnO压敏陶瓷, 显微结构, 电性能

Abstract: ZnO nanopowders prepared by the Sol-Gel method were sintered by microwave. The microstructure of the material was analysed by XRD and SEM. The I-V properties
of varistor were measured by a stabilized dc power source. Compared with the conventional sintering, microwave sintering promptes grain growth and shortenes sintering time.
When grain sizes are the same, the temperature of microwave sintering can be lower than that of conventional sinering. Microwave sintering has the ability to enhance the density of
ZnO varistor ceramic and to obtain good electric propertises. Hence, microwave sintering is a newly effective method for processing ZnO varistor ceramic.

Key words: microwave sintering, ZnO varistor, microstructure, electric properties

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