Abstract

The thermal expansion and thermal conductivity of In₂S₃ and AgIn₅S₈ single-crystal compounds and (In₂S₃)_x(AgIn₅S₈)_{1 – x} alloys grown by the Bridgman method are studied. It is established that the thermal-expansion coefficient linearly varies under changes in the composition parameter x and the thermal conductivity has a minimum for the equimolar composition. From experimental data on the thermal-expansion coefficient, the Debye temperature and the root-mean-square (rms) dynamic displacements of atoms are calculated. It is shown that, as the content of Ag atoms in the alloys is increased, the Debye temperature increases and the rms dynamic displacements of atoms in the crystal lattice decrease.

中文翻译：

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（In 2 S 3）x（AgIn 5 S 8）1 – x合金的热膨胀系数和导热系数

摘要

研究了用Bridgman方法生长的In ₂ S ₃和AgIn ₅ S ₈单晶化合物以及（In ₂ S ₃）_x（AgIn ₅ S ₈）_{1- x}合金的热膨胀和热导率。可以确定，热膨胀系数随组成参数x的变化而线性变化。对于等摩尔组成，导热系数最小。根据有关热膨胀系数的实验数据，计算了德拜温度和原子的均方根（rms）动态位移。结果表明，随着合金中Ag原子含量的增加，德拜温度升高，晶格中原子的均方根动态位移减小。