Nd∶NaBi(WO_4)_2晶体生长  

GROWTH OF Nd DOPED NaBi(WO_4)_2 CRYSTAL

作　　者：刘景和[1] 易里成容[1] 孙晶[1] 王英伟[1] 李建立[1] 张亮[1] 于亚勤[2] 

机构地区：[1]长春光学精密机械学院材料化工分院,长春130022 [2]中国科学院长春应用化学研究所,长春130022

出　　处：《硅酸盐学报》2003年第2期165-168,共4页Journal of The Chinese Ceramic Society

基　　金：吉林省科技厅科技发展计划资助项目(吉科 19990 5 19-2号吉科 2 0 0 10 65 9-4 )

摘　　要：采用Czochralski法生长出尺寸为 8mm× 2 0mm的掺钕的钨酸铋钠 [分子式 :Nd∶NaBi(WO4) 2 ,简称 :Nd∶NBW ]激光晶体 ,研究了生长工艺参数对Nd∶NBW晶体结构完整性的影响 ,确定了最佳的生长工艺参数 :轴向温度梯度为 0 .7～ 1℃ /mm ,生长速率 0 .2～ 0 .5mm/h ,晶体转速 1～ 4r/min。并利用了X射线衍射确定了Nd∶NBW晶体属于四方晶系 ,I41 /a空间群 ,其晶格常数为a =0 .5 2 75nm ,c=1.14 93nm。通过TG -DTA分析了Nd∶NBW晶体的相关物理、化学性质 ,确定了其熔点为 936.2℃ ,并与纯的钨酸铋钠晶体 (分子式 :NaBi(WO4) 2 ,简称 :NBW)The laser crystal Nd∶NaBi(WO 4) 2 (for short: Nd∶NBW) with 8mm in diameter and 20 mm in length was grown by Czochralski method. The rational technical parameters were designed in the crystal growth process, which are: the axial temperature gradient of 0.7-1 ℃/mm in solid_liquid interface, the pulling speed 0.2-0.5 mm/h and the rotating rate 1-4r/min. The structure and letter parameters of the Nd∶NBW crystal were determined by X_ray diffraction. The Nd∶NBW single crystal belongs to square system with the space group of I4 1/a , the lattice parameters are a =0.527 5 nm, c =1.149 3 nm. The result of TG-DTA analysis indicate that melting point of Nd∶NBW crystal is 936.2 ℃,and it have better thermal stability. The comparison research between NaBi(WO 4) 2 (for short: NBW) crystal and Nd∶NBW crystal are performed.

关 键 词：Nd:NaBi(WO4)2 掺钕钨酸饿钠晶体 提拉法 晶体生长 激光晶体 

分 类 号：O782.5[理学—晶体学]