A series of experiments were performed to study the solid solubility of CaO in BaY₂O₄, and the observed results were then adopted to the present thermodynamic evaluation to derive a set of thermodynamic database for the BaO-CaO-YO_1.5 system. The database was constructed by the CALPHAD method where the binary parameters from the BaO-CaO and CaO-YO_1.5 systems were presently optimized, those from the BaO-YO_1.5 system were simulated by our previous assessments, and only limited amount of ternary parameters were introduced. All the model parameters were emanated from the Bragg-Williams approximation where the liquid and terminal solid-solution phases were treated by the one-sublattice model, and two ternary intermediate phases, named BCY (BaCa₂Y₆O₁₂) and BaY₂O₄, were described by the three-sublattice and two-sublattice models, respectively. Good agreement between the experimental data and the calculated results demonstrates that the present thermodynamic database is self-consistent and credible and able to be used to design novel refractory.

进行了一系列实验研究CaO在BaY ₂ O ₄中的固溶度，然后将观察到的结果用于当前的热力学评估，以得出BaO-CaO-YO _1.5系统的一组热力学数据库。该数据库是通过CALPHAD方法构建其中从二进制参数的BaO-CaO和CaO系YO _1.5系统被当前优化，那些来自的BaO-YO _1.5我们先前的评估对系统进行了模拟，仅引入了数量有限的三元参数。所有的模型参数由Bragg-Williams的近似，其中所述液体和终端固溶相由单亚晶格模型处理，以及两个三元中间相，命名为BCY（巴卡发出₂ ý ₆ ö ₁₂）和月桂₂ ö_图4分别由三子晶格模型和两子晶格模型描述。实验数据和计算结果之间的良好一致性表明，当前的热力学数据库是自洽的和可信的，能够用于设计新型耐火材料。