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KMID : 1059519950390100806
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Journal of the Korean Chemical Society
1995 Volume.39 No. 10 p.806 ~ p.811
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Electrical Properties of (Ba,Sr)1-xYxTiO3 with Variation of Yttrium Content
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Noh Tae-Yong
Sung Hyun-Je
Kim Seung-Won
Lee Chul
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Abstract
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The electrical properties for (Ba,Sr)1-xYxTiO3(x=0.001∼0.009, BSYT) with a positive temperature coefficient of resistivity(PTCR) effect were investigated. The BSYT powder was prepared by oxalate coprecipitation method. It was found that the large PTCR effect was appeared up to 0.3 mol% and decreased above 0.5 mol% of the yttrium concentration. The plot of temperature vs. 1/εm(T) above Curie temperature(Tc) was agreed with Curie-Weiss law. The potential barrier calculated from measured resistivity and dielectric constant of specimens was high up to 0.3 mol% and reduced above 0.5 mol% of yttrium concentration as the curve of PTCR effect.
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KEYWORD
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