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采用溶胶-凝胶方法合成系列新型氧化物Ce6-xSmxMoO15-δ(0≤x≤1.2).通过TG-DTA,XRD和XPS等手段对氧化物结构进行了表征.结果表明,氧化物的最低成相温度为400℃,具有立方莹石结构.Sm的掺杂可增加氧离子空位浓度,改善母体电导率.阻抗谱表明,采用溶胶-凝胶法合成固体电解质可减少或消除其晶界电阻.800℃时,Ce5.2Sm0.8MoO15-δ的电导率高达6.67×10-3S/cm.
A series of novel oxides Ce6-xSmxMoO15-δ (0≤x≤1.2) were synthesized by the sol-gel method.The structures of the oxides were characterized by TG-DTA, XRD and XPS.The results showed that the lowest The phase temperature is 400 ℃, with a cubic fluorite structure.Sm doping can increase the vacancy concentration of oxygen ions to improve the matrix conductivity.The impedance spectra show that the sol-gel synthesis of solid electrolyte can reduce or eliminate the grain boundary resistance. At 800 ℃, the conductivity of Ce5.2Sm0.8MoO15-δ is as high as 6.67 × 10-3S / cm.