Phase Diagram of Pseudo-binary System LiF-CaAlF5

Abstract

Abstract: The phase equilibrium in pseudo-binary system LiF-CaAlF₅ was studied by means of thermal analysis (DTA) and X-ray diffraction (XRD). A congruent melting compound LiCaAlF₆ with melting point of 814℃ produces at the composition of LiF:CaAlF₅=1:1. There exist two eutectic systems from LiF to LiCaAlF₆ and from LiCaAlF₆ to CaAlF₅ with eutectic temperatures of 705℃ and 781℃ respectively. According to the proposed phase diagram, fluoride laser crystal Cr³⁺:LiCaAlF₆ was grown by Bridgman method.

Key words: LiF-CaAlF₅, phase equilibrium, crystal growth

CLC Number:

O658

CHEN Hong-Bing,FAN Shi-Ji. Phase Diagram of Pseudo-binary System LiF-CaAlF₅[J]. Journal of Inorganic Materials.

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Phase Diagram of Pseudo-binary System LiF-CaAlF₅

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