钛酸钡陶瓷正温度系数传感器的晶界电阻率

1997 IEEE Hong Kong Proceedings Electron Devices Meeting Pub Date : 1997-08-30 DOI:10.1109/HKEDM.1997.642354

H. Wong, P. Han, M. Poon, Y.Y. Chen, X.R. Zheng

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引用次数: 1

摘要

利用市售的BaTiO/ sub3 /粉末和不同的添加剂(Y, Mn, Nb, AST)制备了几种正温度系数电阻器(PTCR)。我们发现不同的添加剂会导致不同的晶粒尺寸、晶粒表面和孔隙率。然而，这些样品的温度相关电阻率没有显著差异。提出了一个新的模型来解释这种差异和PTCR的三段特征。

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Grain-boundary resistivity in barium titanate ceramic positive temperature coefficient sensors

Several positive temperature coefficient resistors (PTCR's) are prepared using commercially available BaTiO/sub 3/ powders with different additives (Y, Mn, Nb, AST). We found that the different additives will result in different grain sizes, grain surface and porosity. However, the temperature-dependent resistivities of these samples do not have significant difference. A new model is proposed to explain this discrepancy and the three-segment characteristics in the PTCR.

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来源期刊

1997 IEEE Hong Kong Proceedings Electron Devices Meeting

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