对恒温热处理后的 NaCl-CaCl_2样品进行差热分析、室温和高温 X 射线粉末照相,并对恒温热处理快速淬火后样品进行了 X 射线衍射结构分析。实验证明了 NaCl-CaCl_2二元体系不存在包晶反应所形成的化合物4NaCl·CaCl_2,属共晶体系,共...对恒温热处理后的 NaCl-CaCl_2样品进行差热分析、室温和高温 X 射线粉末照相,并对恒温热处理快速淬火后样品进行了 X 射线衍射结构分析。实验证明了 NaCl-CaCl_2二元体系不存在包晶反应所形成的化合物4NaCl·CaCl_2,属共晶体系,共晶温度为773K,共晶组成为49mol%NaCl、5lmol%CaCl_2;在 NaCl 一侧有固溶体存在;在共晶温度处的固溶度约为18mol%CaCl_2。该二元系的实验测定结果与理论计算结果吻合也很好。展开更多
The approach recently proposed by Liu and Qu was extended to correlate excess enthalpies of highly asymmetric binary systems.In this approach,FRKS equation of state was used, and Lij（T,x）function was applied in plac...The approach recently proposed by Liu and Qu was extended to correlate excess enthalpies of highly asymmetric binary systems.In this approach,FRKS equation of state was used, and Lij（T,x）function was applied in place of single value of the binary interaction parameter Lij.Twenty four binary systems,including benzene -(C11～C17)lakane,benzene -methyl naphthalene,xylene-（C3～C8）al-cohol,l-Hepetanol-（C6～C9）alkane,methanol,ethanol-chlorobenzene,were selected to do the test.For most of these binary systems, no equation of state method has been found accurate.The results obtained show that this method can improve significantly the correlation of excess enthalpies for highly asymmetric binary systems.The calculated excess enthalpies for most of the selected systems are in good agreement with experimental data.展开更多
Melting temperatures have been measured and the solid-liquid phase diagrams constructed for 1-hexanol＋o-xylene, 1-hexallol＋m-xylene and 1-hexanol＋p-xylene. They are simple eutectic systems. Excess mole Gibbs free e...Melting temperatures have been measured and the solid-liquid phase diagrams constructed for 1-hexanol＋o-xylene, 1-hexallol＋m-xylene and 1-hexanol＋p-xylene. They are simple eutectic systems. Excess mole Gibbs free energies were calculated at 298.15K, showing larger positive deviations from ideal-solution behavior. The largest values of GEm are 711、 650 and 800 J·mol-1 for {o-C6H4(CH3)2＋C6H13OH}、 {m-C6H4(CH3)2 ＋ C6H13OH} and {p-C6H4(CH3)2＋C6H13OH} respectively.展开更多
文摘对恒温热处理后的 NaCl-CaCl_2样品进行差热分析、室温和高温 X 射线粉末照相,并对恒温热处理快速淬火后样品进行了 X 射线衍射结构分析。实验证明了 NaCl-CaCl_2二元体系不存在包晶反应所形成的化合物4NaCl·CaCl_2,属共晶体系,共晶温度为773K,共晶组成为49mol%NaCl、5lmol%CaCl_2;在 NaCl 一侧有固溶体存在;在共晶温度处的固溶度约为18mol%CaCl_2。该二元系的实验测定结果与理论计算结果吻合也很好。
文摘The approach recently proposed by Liu and Qu was extended to correlate excess enthalpies of highly asymmetric binary systems.In this approach,FRKS equation of state was used, and Lij（T,x）function was applied in place of single value of the binary interaction parameter Lij.Twenty four binary systems,including benzene -(C11～C17)lakane,benzene -methyl naphthalene,xylene-（C3～C8）al-cohol,l-Hepetanol-（C6～C9）alkane,methanol,ethanol-chlorobenzene,were selected to do the test.For most of these binary systems, no equation of state method has been found accurate.The results obtained show that this method can improve significantly the correlation of excess enthalpies for highly asymmetric binary systems.The calculated excess enthalpies for most of the selected systems are in good agreement with experimental data.
文摘Melting temperatures have been measured and the solid-liquid phase diagrams constructed for 1-hexanol＋o-xylene, 1-hexallol＋m-xylene and 1-hexanol＋p-xylene. They are simple eutectic systems. Excess mole Gibbs free energies were calculated at 298.15K, showing larger positive deviations from ideal-solution behavior. The largest values of GEm are 711、 650 and 800 J·mol-1 for {o-C6H4(CH3)2＋C6H13OH}、 {m-C6H4(CH3)2 ＋ C6H13OH} and {p-C6H4(CH3)2＋C6H13OH} respectively.
