The phase diagrams of the quasibinary systems (Pb, Ge)Te and (Ge, Sn)Te
The phase diagrams of the quasibinary systems (Pb, Ge)Te and (Ge, Sn)Te
复制标题
准二元体系 (Pb, Ge)Te 和 (Ge, Sn)Te 的相图
DOI：
10.1016/s0925-8388(00)01172-5
复制
发表时间：
2000
影响因子：
6.2
通讯作者：
V. Leute
中科院分区：
文献类型：
--
作者：
L. Yashina;V. Leute
用Gibbs能量函数计算了两个准二元体系（Pb1−kGek）Te和（Ge1−kSnk）Te的相图。这些函数中使用的依赖于浓度和温度的相互作用参数是通过调整计算的平衡曲线来确定的。从相互作用参数也可以计算出相互扩散的热力学因子。利用这一热力学因素和实验确定的（Pb1−kGek）Te中Ge和Pb的相互扩散系数对组分的依赖关系，将讨论示踪剂扩散系数对组分的依赖关系。此外，通过使用团簇模型，确定了团簇局部排列的变化作为摩尔分数k的函数，并将用于解释两个系统热力学行为的差异。
The phase diagrams of the two quasibinary systems (Pb1−kGek)Te and (Ge1−kSnk)Te were calculated from Gibbs energy functions. The concentration and temperature dependent interaction parameters used in these functions were determined by adjusting the calculated equilibrium curves to data taken from the literature. From the interaction parameters also the thermodynamic factor for interdiffusion could be calculated. Using this thermodynamic factor and the experimentally determined composition dependence of the interdiffusion coefficient of Ge and Pb in (Pb1−kGek)Te the dependence of the tracer diffusion coefficients on composition will be discussed. Moreover, by use of a cluster model, the variation of the local arrangement of clusters as a function of the mole fraction k was determined and will be used to explain differences in the thermodynamic behaviour of the two systems.