采用碘定量滴定和X射线能谱分析对钙钛矿氧化物Sm1-xSrxCoC3-δ (x=0.2,0.3,0.5,0.7,0.8)体系进行了非化学计量氧含量的测定.研究表明,两种测试结果变化趋势一致,各有优劣.采用直流四探针法研究了氧空位浓度与导电性能的关系,结果表明,随着Sr掺量的增加,Sm1-xSrxCoO3-δ氧空位浓度增加,在x=0.5时导电性最佳,原因是氧空位浓度过高会导致空位团簇,减少有效空位,影响电子-离子的传导.
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