Phase relations in the system PbS-PbSe-PbTe
Phase relations in the system PbS-PbSe-PbTe
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DOI：
10.1180/minmag.1994.058.393.04
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发表时间：
1994-12
影响因子：
2.7
通讯作者：
H. Liu;L. L. Chang-L.
中科院分区：
文献类型：
--
作者：
H. Liu;L. L. Chang-L.
在1150 ~ 300°C温度范围内研究了PbS-PbSe-PbTe体系的相关系。沿着PbS-PbSe连接处存在完整的固溶体系列，而沿PbSe-PbTe和PbS-PbTe连接处分别在低于350°C和805°C下存在可熔性间隙。这两个能隙都延伸到三元系中，PbS和PbTe之间的差距的范围随着温度和Se含量的增加而减小。利用Ganguly和Saxena（1987）的亚规则混合模型，导出了PbX的混合能学和活度组成关系。相互作用参数的温度依赖性分别为5057.6 − 1.7T、9605.2 − 4.4T、3933.2 − 3.1T（T < 500°C）、6410.3 − 6.35T（T < 500°C）、1649 − 0.26T、1594.6 − 0.2T和12906.3 − 17.3T。通过相互作用参数的计算，得到了PbS-PbSe连接处的一个沿着临界温度为100°C，表明PbS-PbSe系发生了分离。在这项研究中建立的固溶体范围与自然发生的相关性。
Abstract Phase relations in the system PbS-PbSe-PbTe were investigated in the temperature range between 1150 and 300°C. There is a complete solid solution series along the join PbS-PbSe, whereas miscibility gaps exist below ∼ 350°C and 805°C along joins PbSe-PbTe and PbS-PbTe, respectively. Both gaps extend into the ternary system, and the range of the gap between PbS and PbTe reduces in size with temperature as well as Se-content. By using the subregular model of mixing (Ganguly and Saxena, 1987), mixing energetics and activity composition relations of PbX were derived. The temperature-dependence of the interaction parameters was calculated to be 5057.6 − 1.7T, 9605.2 − 4.4T, 3933.2 − 3.1T (T < 500°C), 6410.3 − 6.35T (T < 500°C) 1649 − 0.26T, 1594.6 − 0.2T, and 12906.3 − 17.3T for WWSte, WTeS, WSeTe, WTeSe, WSSe, WSeS, and WSSeTe, respectively. A critical temperature along the join PbS-PbSe at ∼ 100°C was obtained from interaction parameter calculation, which suggests the separation of the PbS-PbSe series. Correlation of solid-solution ranges established in this study with natural occurrences was made.