DKDP晶体生长亚稳区的影响因素  

INFLUENCE FACTORS ON METASTABLE ZONE IN DKDP CRYSTAL GROWTH

作　　者：常新安[1] 臧和贵[1] 陈学安[1] 陈丹[1] 杨鹏[1] 涂衡[1] 王金淑[1] 周美玲[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100022

出　　处：《硅酸盐学报》2007年第8期1070-1076,共7页Journal of The Chinese Ceramic Society

基　　金：北京市自然科学基金(2032005);北京市委组织部优秀人才专项培养基金资助项目

摘　　要：从热力学和动力学角度研究与分析了磷酸二氘钾[K(D1-xHx)2PO4,DKDP]晶体生长体系稳定性的主要影响因素,包括氘含量、溶液纯度、饱和温度、晶转(或搅拌)速度、过热温度与时间、生长均匀性、晶体受力情况、籽晶尺寸等。提出采用高纯原料、超细过滤(孔径为0.15μm)、高出饱和点10℃过热20h,以及优质点状籽晶均匀生长等措施,可拓宽DKDP晶体生长亚稳区,从而提高晶体生长起始温度达50℃以上,在溶液过饱和度较大的条件下可实现DKDP晶体全方位快速生长。The main influencing factors of the stability of growth system of tetragonal potassium dideuterium phosphate （DKDP） crystal, such as the deuterium content in solution, the purity of the solution, saturation temperature, rotative velocity of crystal, the superheating temperature and period, the homogeneity of growth, the stress on the crystal from outside and the size of the seed crystal, have been studied and analyzed from the viewpoint of thermodynamics and kinetics. It is indicated that the metastable zone of tetragonal DKDP crystal growth can be widened and the starting temperature of crystal growth can be raised to 50 ℃ by using high purity raw materials, super fineness filtering （bore diameter 0.15 μm） and superheating at 10 ℃ higher than the saturation point for 20 h, so the rapid growth of DKDP crystal in all directions can be realized at the conditions of lower acidity and higher supersaturability.

关 键 词：磷酸二氘钾晶体 溶液法晶体生长 溶液稳定性 生长亚稳区 快速生长 

分 类 号：O781[理学—晶体学]