K_2Al_2B_2O_7-NaF体系的热分析研究  

Investigation on the KABO-NaF System with a DTA Method

作　　者：张承乾[1] 程秀风[2] 王继扬[2] 陈创天[1] 

机构地区：[1]中国科学院理化技术研究所北京人工晶体研究发展中心,北京100080 [2]山东大学晶体材料国家重点实验室,济南250100

出　　处：《人工晶体学报》2003年第5期433-437,共5页Journal of Synthetic Crystals

基　　金："十五"863计划项目(2002AA311040)

摘　　要：用热分析的方法研究了KABO-NaF体系的物相关系,提出了KABO-NaF体系的赝二元相图。KABO和NaF可以形成低共熔体系,D KABO含量约30％时低共烙温度约为79℃。KABO在体系中的摩尔百分含量为30％～40％之间为KABO结晶区。KABO-NaF体系在500℃左右发生一个放热过程,675℃左右有一个复杂的吸热相变过程。The phase relation of KABO-NaF system was investigated with a differential thermal analysis (DTA) method. The quasibinary diagram of NaF-KABO was proposed. KABO and NaF can form a eutectic system at a 30% proportion of KABO in the system. The eutectic temperature point is about 790℃. KABO can be crystallized in NaF flux at the mole ratio of 30-40% . Exothermic changes at 500℃ and endothermic changes at 675℃ are observed respectively in the NaF-KABO system.

关 键 词：K2Al2B2O7-NaF体系 热分析 差热分析 相图 晶体生长 硼酸铝钾 助溶剂法 

分 类 号：TN244[电子电信—物理电子学] O78[理学—晶体学]