Abstract

For the first time, the results of investigations of ion transport phenomena in high-temperature modifications of single-crystalline copper selenide are presented depending on the temperature and the composition within the homogeneity region as well as the effect of the degree of perfection of single-crystalline samples on the ion transfer. It is found that the activation energy estimated from the temperature dependences of the ionic conductivity for perfect single crystals is significantly higher than in polycrystalline samples and increases with a deviation from stoichiometry. For single crystals, lower values of ionic conductivity are observed. The ionic conductivity in the temperature range of 573–723 K is 1.5–2 times higher for polycrystalline samples than for single crystals.

中文翻译：

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硒化铜中的离子电导率

摘要

第一次，根据温度和均匀区域内的组成以及单晶完美化程度的影响，提出了单晶硒化铜高温改性中离子迁移现象的研究结果。结晶样品上的离子转移。已经发现，从理想的单晶的离子电导率的温度依赖性估计的活化能明显高于多晶样品中的活化能，并且随着化学计量的偏离而增加。对于单晶，观察到较低的离子电导率值。多晶样品在573–723 K的温度范围内的离子电导率是单晶的1.5–2倍。