Выращивание и физические свойства монокристаллов CaSrBaF6
Аннотация
Методом Бриджмена–Стокбаргера выращены кристаллы тройного фторида CaF2–SrF2–BaF2
в области составов, близких к CaSrBaF6. Диаметр кристаллов 10–12 мм, длина 50–60 мм. Кристалл CaSrBaF6 является новым оптическим материалом, прозрачным в среднем ИК-, видимом, и УФ-диапазоне. Неравномерность распределения компонентов по длине кристалла не превышает 10 %. Край полосы поглощения в ИК области составляет 14.3 мкм, оптическое поглощение на длине волны 200 нм не превышает 18 % (менее 0.2 см–1). Коэффициенты преломления для длин волн 633, 969, 1539 нм составили 1.4527, 1.4488, 1.4458 соответственно. Кристалл плавится в интервале температур 1150–1210 о С. Состав CaSrBaF6 является подходящей матрицей для легирования редкоземельными ионами для получения функциональных монокристаллических и керамических материалов видимого и ИК-диапазонов.
Скачивания
Литература
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