ZnO导电陶瓷的微观结构与导电机理  

The Microstructure and Conductive Mechanism of ZnO Conductive Ceramics

作　　者：石康源[1] 张绪礼[1] 王筱珍[1] 汤清华[1] 陈秀珍 

机构地区：[1]华中理工大学固体电子学系

出　　处：《功能材料》1996年第1期61-63,共3页Journal of Functional Materials

基　　金：国家自然科学基金

摘　　要：本文探讨了ＺｎＯ导电陶瓷的微观结构与导电机理。发现其具有不同于ＺｎＯ压敏电阻和ＺｎＯ线性电阻的特殊的微观结构。该导电陶瓷是由大的并带有针状的晶粒及小的粒状晶粒组成。针状晶粒体积较大（１５～２０μｍ），它们在烧结体内相互连接，形成一个连续的整体而贯穿烧结体始终。本文还介绍了该导电陶瓷的特点。该导电陶瓷室温电阻率可达到０．０６８Ωｃｍ，室温下就能导电，工作时无需预热。The microstructure and conductive mechanism of ZnO conductive.ceramics are discussed in this paper.It is found that the microstructure of the ceramics is different from that of ZnO varistors and ZnO linear resistors.It is composed of large needle grains and small granular grains.The large grains(15～20μm)connect with each other to form a continuous notwork and pass through the whole ceramics.The resistivity at room temperature of the ceramics can be as low as 0.068Ω·cm,so that the ceramics can be conductive at room temperature without preheat during operation.

关 键 词：导电陶瓷 微观结构 导电机理 氧化锌 

分 类 号：TM28[一般工业技术—材料科学与工程]