Полуэмпирическое описание закономерности изменения теплопроводности монокристаллов на примере концентрационной серии твердых растворов Ba1–xLaxF2+x
DOI:
https://doi.org/10.17308/kcmf.2026.28/13561Ключевые слова:
дифторид бария, лантан, твердый раствор, кластеры дефектов, теплопроводность, полуэмпирическая модельАннотация
Цель работы: Исследование теплопроводности монокристаллов твердого раствора Ba1–xLaxF2+x и полуэмпирическое описание закономерности изменения теплопроводности в зависимости от содержания лантана.
Экспериментальная часть: В интервале температур 50–300 К экспериментальным методом продольного теплового потока определена теплопроводность монокристаллических образцов с содержанием лантана от х = 0.001 до х = 0.30.
Выводы: Выявлена монотонная концентрационная зависимость теплопроводности для твердого раствора Ba1–xLaxF2+x. Для аппроксимации экспериментальных значений теплопроводности предложено полуэмпирическое выражение
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