氧化锌压敏陶瓷中氧化锌晶粒极性生长现象的研究

无机材料学报

氧化锌压敏陶瓷中氧化锌晶粒极性生长现象的研究

何忠伟¹; 许业文^1,3; 徐政¹; 孙丹峰²

1. 同济大学材料科学与工程学院, 上海 200092; 2。苏州中普电子有限公司，苏州 215011; 3。总装备部工程兵科研一所，无锡 214035

收稿日期:2004-09-06 修回日期:2004-10-10 出版日期:2005-09-20 网络出版日期:2005-09-20

Polar Growth Phenomenon in ZnO Varistor

HE Zhong-Wei¹; XU Ye-Wen^1,3; XU Zheng¹; SUN Dan-Feng²

1.Department of Material Science & Engineering; Tongji University; Shanghai 200092, China; Suzhou Sinotronix Electronics Co.; Ltd; Suzhou 215011, China; 3. The First Engineers Scientific Research Institute of the General Armaments Department; Wuxi 214035, China

Received:2004-09-06 Revised:2004-10-10 Published:2005-09-20 Online:2005-09-20

摘要/Abstract

摘要：

发现了ZnO压敏陶瓷中的锥状或柱状“突起物”现象.通过能谱发现“突起物”的物质构成是ZnO,而且是ZnO晶粒生长形成的实体,并非气体在ZnO中形成的气泡.进一步论证了这种现象是ZnO极性生长造成的,并从内因和外因两个方面进行了分析.内因是ZnO的极性晶格结构和结晶形态,外因是ZnO压敏陶瓷中Bi₂O₃液相提供了极性生长得以显现的物化环境,并且通过单独添加Bi₂O₃的97mol%ZnO+3mol%Bi₂O₃配方和100mol%纯ZnO配方制备样品进行对比实验,验证了Bi₂O₃的作用.

关键词: 氧化锌压敏陶瓷, 突起物, 极性生长, 晶格结构, 氧化铋液相

Abstract: The protuberance phenomenon in shape of conic or cylinder was discovered for the first time. It was found by EDS that the protuberance is entity formed by ZnO, not the air bubble. And it was proved that the polar growth of ZnO leads to the protuberance phenomenon. The detailed reasons were probed from internal and external courses. The internal course is the polar structure and morphology of ZnO crystal. The external course is the physical and chemical environment made by Bi₂O₃ liquid phase, and this conclusion was proved by the comparisons of the samples which fabricated by 97mol%ZnO+3mol%Bi₂O₃ (in mole) compound and 100mol% (in mole) ZnO compound.

Key words: ZnO varistor, protuberance, polar growth, crystal structure, Bi2O3 liquid phase

中图分类号:

TM283

何忠伟,许业文,徐政,孙丹峰. 氧化锌压敏陶瓷中氧化锌晶粒极性生长现象的研究[J]. 无机材料学报.

HE Zhong-Wei,XU Ye-Wen,XU Zheng,SUN Dan-Feng. Polar Growth Phenomenon in ZnO Varistor[J]. Journal of Inorganic Materials.

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