Properties of yttrium-doped barium titanate ceramics with positive temperature coefficient of resistivity and a novel method to evaluate the depletion layer width

2019 ◽  
Vol 45 (5) ◽  
pp. 6119-6124 ◽  
Author(s):  
Jianqiao Liu ◽  
Guohua Jin ◽  
Yuzhen Chen ◽  
Weiting Xue
Keyword(s):  
Barium Titanate ◽  
Temperature Coefficient ◽  
Positive Temperature Coefficient ◽  
Depletion Layer ◽  
Positive Temperature ◽  
Layer Width ◽  
Novel Method ◽  
Temperature Coefficient Of Resistivity ◽  
Doped Barium Titanate ◽  
Titanate Ceramics

Electrical breakdown of the positive temperature coefficient of resistivity barium titanate ceramics

1996 ◽  
Vol 11 (8) ◽  
pp. 2002-2008 ◽  
Author(s):  
Duk-Hee Kim ◽  
Woo-Sik Um ◽  
Ho-Gi Kim
Keyword(s):  
Barium Titanate ◽  
Temperature Coefficient ◽  
Applied Voltage ◽  
Electrical Breakdown ◽  
Positive Temperature Coefficient ◽  
Positive Temperature ◽  
Three Samples ◽  
Barium Titanate Ceramic ◽  
Temperature Coefficient Of Resistivity ◽  
Titanate Ceramics

Positive temperature coefficient of resistivity barium titanate ceramic is a semiconductor at room temperature, so it is self-heated under certain applied voltage, and then changes into an insulator. The electrical breakdown has been investigated with the resistance-temperature characteristics of the three samples which have different compositions. The grain size effect on the breakdown voltage also is discussed. As the applied voltage increased, the electrical breakdown was initiated when the specimen interior was heated above the temperature corresponding to the maximum resistance on the resistance-temperature curves by joule heat.

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