赝二元系LiF-CaAlF_5相图  

Phase Diagram of Pseudo-binary System LiF-CaAlF_5

作　　者：陈红兵[1] 范世骥[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《无机材料学报》2000年第3期397-402,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金!59672002

摘　　要：本文通过差热分析（DTA）和X射线粉末衍射（XRD）方法研究了赝二元系LiF-CaAlF5的相平衡关系．该赝二元系在LiF：CaAlF5=1：1处形成一致融熔化合物LiCaAlF6，其熔点为814℃，并分别在LiF～LiCaAlF6和LiCaAlF6～CaAlF5区域形成两个共晶体系，其共晶温度分别为705℃和781℃．根据体系的相图，采用坩埚下降法生长出氟化物激光晶体Cr3＋：LiCaAlF6．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.

关 键 词：晶体生长 赝二元系 相图 激光晶体 氟化物 

分 类 号：TN244.01[电子电信—物理电子学] O782.5[理学—晶体学]