Hot spot in La-doped BaTiO3 ceramic rod

被引：8
|
作者：
Sunatori, H [1 ]
Okamoto, T [1 ]
Takata, M [1 ]
机构：
[1] Nagaoka Univ Technol, Dept Elect Engn, Nagoya, Niigata 9402188, Japan
来源：
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2003年 / 111卷 / 03期
关键词：
La-doped BaTiO3; PTCR; current-voltage characteristic; temperature distribution; constant current;
D O I：
10.2109/jcersj.111.217
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The current-voltage characteristic and the temperature distribution of the BaTiO3 ceramic rod were investigated. When a certain voltage was applied to the rod, the current through the rod abruptly decreased, and the temperature distribution markedly changed resulting in the appearance of a hot spot where the temperature was higher than that of the rest of the rod. With increasing voltage after the appearance of the hot spot, the current remained constant and the temperature and size of the hot spot increased. The results have shown that the hot spot regulates the current through the rod by changing its temperature, which may lead to new applications of BaTiO3.
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页码：217 / 218
页数：2
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