Effect of <TEX>$M_2O_3$</TEX> on the Sinterbility and Electrical Conductivity of <TEX>$ZrO_2(Y_2O_3)$</TEX> System (I): Ceramics of the:<TEX>$ZrO_2-Y_2O_3-Bi_2O_3$</TEX> System

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J. Korean Ceram. Soc. > Volume 23(3); 1986 > Article

Journal of the Korean Ceramic Society 1986;23(3): 87.

$ZrO_2(Y_2O_3)$ 계 세라믹스의 소결성과 전기전도도에 대한 $M_2O_3$의 영향 (I):$ZrO_2-Y_2O_3-Bi_2O_3$계 세라믹스

오영제, 정형진, 이희수¹

한국과학기술원 무기재료연구실
¹연세대학교 요업공학과

Effect of $M_2O_3$ on the Sinterbility and Electrical Conductivity of $ZrO_2(Y_2O_3)$ System (I): Ceramics of the:$ZrO_2-Y_2O_3-Bi_2O_3$ System

ABSTRACT

Yttria-bismuth-stabilized zirconia was investigated with respect to the amount of $Bi_2O_3$ addition in the ran-ge of 0.5~5mol% to the base composition of $(ZrO_2)_{0.92}(Y_2O_3)_{0.08}.Bismuth was introduced into the ma-terial with $Bi_2O_3-SiO_2$ glasses in order to reduce the evaporation of components. The sinterbility evaporation of components phase formation and microstructure were evaluated depending on the amount of $Bi_2O_3-SiO_2$ glass addition. Two probe A. C conductivity measurement was subjected to all the specimens and the result was discussed on the possible substitution of $Bi^{3+}$ for $Zr^{4+}$ and interistial $Si^{4+}$ in the fluorite structure of zirconia crystal there-upon the possible change in the capability of oxygen transference within the material. It was found that the addition of $Bi_2O_3$ could improve the sinterbility of material very much while not so much.oxygen sensing material suitable for relative low temperature firing.