| Nd2O3对氧化锌压敏阀片晶粒尺寸的影响 |
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| 引用本文： | 严群,陈家钊,唐俊,涂铭旌.Nd2O3对氧化锌压敏阀片晶粒尺寸的影响[J].稀土,2004,25(2):41-42. |
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| 作者姓名： | 严群 陈家钊 唐俊 涂铭旌 |
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| 作者单位： | 四川大学,材料科学与工程学院,四川,成都,610065 |
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| 摘 要： | 研究微量Nd2O3添加剂对氧化锌压敏阀片的微观组织结构和成分分布的影响,从理论上探讨了Nd2O3影响氧化锌压敏阀片晶粒尺寸的机理。研究结果表明,Nd2O3加入到氧化锌压敏阀片中,Nd与原料中的Zn、Sb、O元素以及Na、Al等杂质形成了新相并分布在ZnO的晶界处,阻碍了ZnO晶界的迁移,从而抑制了ZnO晶粒的长大,使晶粒细小均匀。Nd2O3掺杂的氧化锌压敏阀片具有较为理想的综合电性能。
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| 关 键 词： | 氧化锌压敏阀片 Nd2O3 晶粒 |
| 文章编号： | 1004-0277(2004)02-0041-03 |
| 修稿时间： | 2003年5月6日 |
Effect of Nd2O3 on Grain Size of ZnO Varistor |
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| YAN Qun,CHEN Jia-zhao,TANG Jun,TU Ming-jing.Effect of Nd2O3 on Grain Size of ZnO Varistor[J].Chinese Rare Earths,2004,25(2):41-42. |
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| Authors: | YAN Qun CHEN Jia-zhao TANG Jun TU Ming-jing |
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| Abstract: | The ZnO varistor containing Nd_2O_3 exhibits excellent electrical properties.The effect of Nd_2O_3 on microstructure and composition distribution of ZnO varistor was studied, and a theoretical analysis of the mechanism of the effect of Nd_2O_3 on grain size of ZnO varistor was made. The results show that that a small amount of additive (Nd_2O_3) exists at ZnO grain boundary in the form of a new compound and hinders the movement of grain boundary, which decreases the size of ZnO grain and makes the grain size and distribution more homogeneous, and as a result,Nd_2O_3 improves the electrical properties of the varistor greatly. |
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| Keywords: | ZnO varistor Nd_2O_3 grain size |
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