Fabrication and Electrical Characteristics of SrZr<TEX>$_{0.95}$</TEX>M<TEX>$_{0.05}$</TEX>O<TEX>$_3$</TEX>-<TEX>$delta$</TEX> and BaZr<TEX>$_{0.95}$</TEX>O<TEX>$_3$</TEX>-<TEX>$delta$</TEX>(M=Ga, Y)

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J. Korean Ceram. Soc. > Volume 36(7); 1999 > Article

Journal of the Korean Ceramic Society 1999;36(7): 679.

SrZr$_{0.95}$M$_{0.05}$O$_3$-$delta$ 및 BaZr$_{0.95}$O$_3$-$delta$(M=Ga, Y) 의 제조와 전기적 특성

편영미, 유광수

서울시립대학교 재료공학과

Fabrication and Electrical Characteristics of SrZr$_{0.95}$M$_{0.05}$O$_3$-$delta$ and BaZr$_{0.95}$O$_3$-$delta$(M=Ga, Y)

ABSTRACT

Specimens of SrZr0.95Ga0.05O3-$delta$, SrZr0.95Y0.05O3-$delta$, BaZr0.95Ga0.05O3-$delta$ and BaZr0.95Y0.05O3-$delta$ were fabricated by a solid-state reaction method and subsequent sintering at 150$0^{circ}C$ to 1$600^{circ}C$ The microstructures and electrical characteristics of the specimens were studied. Only BaZr0.95Ga0.05O3-$delta$ showed dense microstructure and had typical impedance spectra at various temperature. Its electrical conductivity by impedance analysis was 2.7$times$10-3$Omega$-1.cm-1 at 90$0^{circ}C$ in air. The BaZr0.95Ga0.05O3-$delta$ exhibited lower grain rsistance in wet atmosphere than in dry atmosphere and the reduction of resistance is due to the proton conduction.

Key words: Proton conductor, Impedance Spectroscopy, Electrical conductivity