Interval percolation and ceramic-metal composite

被引：7
|
作者：
Cheng, Yonghong [1 ]
Wu, Kai [1 ]
Chen, Xiaolin [1 ]
Chen, Yu [1 ]
Meng, Yongpeng
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 25期
关键词：
D O I：
10.1063/1.2825281
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The mixture of the BaTiO3 ceramic powder and silver ink was baked, and the bulk property of positive temperature coefficient (PTC) of BaTiO3 was recovered in the composite. An interval percolation model was put forward to describe this composite. Monte-Carlo simulation confirmed that the bulk property can be surely recovered in a cubic network if the fraction of conductive sites is in the range of 0.101-0.311. Moreover, experimental works indicated that the percolation threshold decreased with the increase of the size of ceramic particles, and the PTC bulk property appeared more obviously at higher electrical field.
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页数：3
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