BaTiO3-(Bi1/2K1/2)TiO3体系制备半导体陶瓷及其表征

2007 Sixteenth IEEE International Symposium on the Applications of Ferroelectrics Pub Date : 2007-05-27 DOI:10.1109/ISAF.2007.4393413

H. Harinaka, Hideaki Takeda, Takashi Nishida, Kiyoshi Uchiyama, T. Shiosaki

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摘要

钛酸钡(BaTiO3)基固溶陶瓷BaTiO3-(Bi1/2K1/2)TiO3 (BBKT100x)是一种无铅正电阻率(PTC)电阻材料的候选材料。随着x的增加，BBKTIOOx陶瓷的最高介电常数(Tm)单调增加，当x>0.0时，BBKTIOOx陶瓷的Tm值高于BaTiO3(=130℃)。热释电系数峰值温度(Tp)表明，BBKT100x陶瓷的铁电性在Tm处消失。还原后的BBKT5陶瓷具有PTC特性和半导体特性。

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Fabrication and Characterization of Semiconductive Ceramics using BaTiO3-(Bi1/2K1/2)TiO3 System

As a candidate of a lead-free positive temperature coefficient of resistivitiy (PTC) themistor material, barium titanate (BaTiO₃) -based solid-solution ceramics, BaTiO₃-(Bi_1/2K_1/2)TiO₃ (BBKT100x), have been synthesized by the conventional ceramic fabrication technique. The maximum temperature of the dielectric constant (T_m) of the BBKTIOOx ceramics monotonously increased with the increasing amount of x. The Tm values of the BBKTIOOx ceramics with x>0.0 were higher than that of BaTiO₃ (=130degC). The peak temperature (T_p) of the pyroelectric coefficient showed that the ferroelectricity of the BBKT100x ceramics disappeared at Tm. The reduced BBKT5 ceramics show PTC characteristics as well as a semiconductivity.

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2007 Sixteenth IEEE International Symposium on the Applications of Ferroelectrics

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