Thermistor ceramic with negative temperature coefficient based on Zn7Sb2O12:: An inverse spinel-type phase

被引：52

作者：

Nobre, MAL ^{[1
]}

Lanfredi, S ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

来源：

APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 03期

关键词：

D O I：

10.1063/1.1494101

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The electric properties of the semiconductor ceramic Zn7Sb2O12 were investigated by impedance spectroscopy. The grain resistance exhibits a thermistor behavior with negative temperature coefficient. Two regions on the resistance curve were identified. Each region shows a different thermistor characteristic parameter (beta), which is equal to 3170 and 3845 degreesC, at measurement temperatures up to 350 degreesC and above 450 degreesC, respectively. The temperature coefficient of the resistance (alpha) was derived being equal to -2.59x10(-2) degreesC(-1) and -1.89x10(-2) degreesC(-1), at 350 and 450 degreesC, respectively. The anomalous behavior of the resistance is further evidence of phase transition phenomenon. (C) 2002 American Institute of Physics.

引用

页码：451 / 453

页数：3

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