抄録
The sinterability, electric conductivity, expansion coefficient and chemical stability were examined for the perovskite-type oxides which are expressed as (La1-XAX)1-ZMO3-δ (A=Sr, Ca, M=Mn, Co, Cr). The sinterability depended on the A site composition X and the deficiency Z. The electric conductivity and the thermal expansion coefficient also depended strongly on the composition of the oxides. The electric conductivity was sensitive to the amount of Sr-substitution and the Co to Mn ratio and high conductivity could be attained without accompanying thermal expansion coefficient mismatch with YSZ. The chemical reaction between the perovskite-type oxides and YSZ resulted in the formation of La2Zr2O7 and SrZrO3 depending on the composition.
