采用固相反应法合成中温固体氧化物燃料电池阴极材料La1-xMxCoO3(M=Ca,Mg,Sr,x=0.2,0.4,0.6),用四探针法测试了样品在不同温度下的直流电导率和不同频率下的交流电导率.结果显示样品的直流电导率随温度的升高而增大,其电输运性能符合小极化子导电机制,具有较高的离子和电子电导率.而交流电导率的测试反映出电导是由晶界导电过程向晶粒导电过程变化的.热重分析测试表明随着温度和掺杂浓度的增加氧空位增加,氧含量减少.
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