EXPERIMENTAL EVALUATION OF THE ACCEPTOR-STATES COMPENSATION IN POSITIVE-TEMPERATURE-COEFFICIENT-TYPE BARIUM-TITANATE

被引：45
|
作者：
HUYBRECHTS, B
ISHIZAKI, K
TAKATA, M
机构：
[1] Nagaoka University of Technology, Nagaoka, Niigata
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1992年 / 75卷 / 03期
关键词：
D O I：
10.1111/j.1151-2916.1992.tb07867.x
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：
Experimental evidence shows that the acceptor-state levels in Sb-doped positive-temperature-coefficient-type BaTiO3 are compensated up to a critical acceptor-state density. Using the slope of the natural logarithm of the resistivity with respect to 1/T, instead of maximum resistivity as a measure for the acceptor-state density, it is possible to estimate this critical value. The value obtained (4.2 x 10(17) m-2) is believed to be the first reported estimate based on experimental data. It is in good agreement with the estimate of 6 x 10(17) m-2 (first reported by Jonker) obtained from the spontaneous polarization of BaTiO3. This shows that the ferroelectric behavior of BaTiO3 is indeed a feasible explanation for the low resistivity below the Curie point, as proposed by Jonker.
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页码：722 / 724
页数：3
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