The work is devoted to the study of temperature dependences of thermal conductivity (T = 300–770 K) of polycrystallic samples of solid solutions based on gadolinium and dysprosium sulfides of the compositions: γ-Gd_xDy_1−xS_1.49 (x = 0.1, 0.2, 0.3, 0.4). It has been found that the morphological features of samples, namely, the specific surface area of crystallites, which causes a change in the number of deformation centers, determines the value of the thermal conductivity of γ-Gd_xDy_1−xS_1.49 solid solutions. The presence of an abnormal decrease in thermal conductivity for the composition of x = 0.2 has been established. When the temperature increases to 770 K, this anomaly decreases slightly. The minimum value of the thermal conductivity coefficient of 0.68 ± 0.03 W/(m·K) is reached for the composition under consideration at 770 K.

这项工作致力于研究基于and和硫化of组成的固溶多晶样品的热导率（T = 300–770 K）的温度依赖性：γ- Gd _x Dy _{1- x} S _1.49（x = 0.1、0.2、0.3、0.4）。已经发现，样品的形态学特征，即，晶体的比表面积，这导致变形中心的数目的改变，确定的γ的Gd的热传导率的值_X的Dy _{1- X}小号_1.49固溶体。对于x＝ 0.2的组成，已经确定存在导热率的异常降低。当温度升高到770 K时，此异常会略有减少。对于所考虑的组合物，在770 K时，导热系数的最小值达到0.68±0.03 W /（m·K）。