Abstract

The solubility of CaF₂ in different chloride and chloride‒fluoride melts has been studied in order to choose appropriate fluxes for crystallization of epitaxial fluorite layers. It is shown that the advantages of the 0.6NaCl–0.4NaF composition over the well-known CaCl₂–CaF₂ flux are the high thermal stability, lower (by half) temperature gradient of solubility, and possibility for reducing the growth temperature by 100°С. Seed crystallization of fluorite in the CaF₂–(0.6NaCl–0.4NaF) flux has been performed both using the temperature reduction method and under the temperature gradient conditions.

中文翻译：

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搜索用于外延萤石层结晶的助熔剂

摘要

研究了CaF ₂在不同的氯化物和氯化物氟化物熔体中的溶解度，以便为外延萤石层的结晶选择合适的助熔剂。结果表明，与已知的CaCl ₂ -CaF ₂助熔剂相比，0.6NaCl–0.4NaF成分的优势在于高的热稳定性，较低的溶解度温度梯度（降低一半）以及将生长温度降低100℃的可能性°С。在CaF ₂ –（0.6NaCl–0.4NaF）助熔剂中萤石的晶种已经使用降温方法和在温度梯度条件下进行了。