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用测量固体电解质电池电动势（ＥＭＦ）的方法，测试了Ｓｍ－Ｂａ－Ｃｕ－Ｏ体系主要化合物的标准Ｇｉｂｂｓ生成自由能；结果发现，稀土复合氧化物Ｓｍ_（１＋ｘ）Ｂａ_（２－ｘ）Ｃｕ_３Ｏ_ｙ，随着固溶度ｘ增加，化合物稳定性下降ＤＴＡ实验支持这一结论。
The standard Gibbs free energy of the main compounds of the Sm-Ba-Cu-O system was tested by measuring the electromotive force (EMF) of the solid electrolyte. The results showed that the rare earth complex oxides Sm 1+ x Ba 2-x Cu 3Oy, As the solubility x increased, the stability of the compound decreased DTA experiments support this conclusion.