Influence of Grain Boundary on the Electrical Properties of <TEX>$WO_3$</TEX>-doped <TEX>$SrTiO_3$</TEX>

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J. Korean Ceram. Soc. > Volume 33(1); 1996 > Article

Journal of the Korean Ceramic Society 1996;33(1): 35.

$WO_3$를 첨가한 $SrTiO_3$의 전기적 성질에 미치는 결정립계의 영향

유인규, 김윤호, 김효태¹, 변재동¹

한국과학기술연구원 세라믹스연구부
¹고려대학교 재료공학과

Influence of Grain Boundary on the Electrical Properties of $WO_3$-doped $SrTiO_3$

ABSTRACT

The influence of grain boundary on the electrical properties of WO3-doped SrTiO3 ceramics has been investi-gated. From the result resistivity and capacitance of grains and boundaries were obtained by employing impedance spectrocopy. And the temperature dependance of capacitance of WO3-doped SrTiO3. was influenced directly by the variation of grain boundary capacitance. It was also found by impedance spectroscopy that the dispersion frequency characteristics showed discernibly that the resistivity of the specimen varied with WO3 content.

Key words: Grain boundary, $SrTiO_3$, Complex impedance, Electrical properties