고체전해질형 연료전지용 전해질로 사용되는 8㏖% YSZ(Y₂O₃ stabilized zirconia)의 소결조건을 변화시켜 이온전도도를 측정하였다. 그 결과 소결조건이 1400℃, 10시간이었을 때 가장 높은 값인 10^(-1)S.㎝^(-1)를 나타내었다. 또한 산소극재료로서 La_(1-)Sr_xMnO₃(0≤X≤1)를 고상반응법으로 제조하여 과전압, 전자전도도, 전해질인 YSZ와의 계면저항 등을 살펴보았다. 그 결과 La에 대한 Sr의 치환량이 50㏖%일 때 가장 우수한 특성을 나타내었다.

Solid oxide electrolytes of 8㏖% YSZ(Y₂O₃ stabilized zirconia) were prepared at various sintering conditions and their ionic conductivities were measured. The highest ionic conductivity of 10^(-1)S.㎝^(-1) was obtained when the sintering temperature was 1400℃ and the sintering time was 10hr. Also the cathode material, La_(1-x)Sr_xMnO₃, was prepared by solid state reaction method and the overpotential, electrical conductivity, and charge transfer resistance between cathode material and YSZ electrolyte were studied. It was found that the optimum doping content of Sr for La was 50㏖%.