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使用以稳定的ZrO2为电解质的高温固体电解质电池电动势方法测量了Ni3Ga非整比金属间化合物1073至1273K均相范围内Ga的活度，计算了偏摩尔焓和偏摩尔摘等热力学性质．考虑4种点缺陷，即分别在2个亚晶格上的反结构原子和空位共存于该Ll2型化合物中，各缺陷生成自由能为可调参数：Ef（Aβ）＝0．60eV，Ef（Bα）＝0．60eV，EfV（α）＝1．5eV，EfV（β）＝2．0eV，用统计热力学方法推导了Ni3Ga非整比化合物均相范围内缺陷浓度及其与温度和成分的关系，得到1123K时整比处的无序参数a’＝0．0009．
The activity of Ga in the homogeneous range of 1073 to 1273K of Ni3Ga non-integral intermetallic compounds was measured by the high-temperature solid electrolyte cell electromotive force method with stable ZrO2 as electrolyte. The thermodynamic properties of partial molar enthalpy and partial molar absorption were calculated. Considering four kinds of point defects, ie, the anti-structure atoms and vacancies coexist in the Ll2 type compound on two sublattices, the free energy of each defect is an adjustable parameter: Ef (Aβ) = 0.60 eV, Ef Bα) = 0.60eV, EfV (α) = 1.5eV and EfV (β) = 2.0eV. The relationship between the concentration of Ni3Ga non-integral compounds in homogeneous phase and its temperature and composition was deduced by statistical thermodynamics , Get the integer ratio at 1123K disorder parameter a ’= 0.0009.