稀土掺杂钨酸钆钾激光晶体生长  

GROWTH OF POTASSIUM GADOLINIUM TUNGSTATE LASER CRYSTAL DOPED WITH RARE EARTH IONS

作　　者：王宇明[1] 刘文莉[2] 张礼杰[1] 李建利[1] 万玉春[1] 雷鸣[1] 刘景和[1] 

机构地区：[1]长春理工大学材料与化工学院,长春130022 [2]中国兵器科学研究院,北京100101

出　　处：《硅酸盐学报》2005年第12期1468-1471,共4页Journal of The Chinese Ceramic Society

基　　金：总装预研项目(41312040801)资助项目。~~

摘　　要：以K_2W_2O_7为助溶剂,在钨酸钆钾[KGd(WO_4)_2,KGW]晶体中分别掺入稀土元素离子Nd^(3+),Yb^(3+),Er^(3+)和Er^(3+)+Yb^(3+),用顶部籽晶提拉法分别生长出Nd∶KGW,Yb∶KGW,Er∶KGW和Er∶Yb∶KGW4种激光晶体。获得最佳的生长工艺参数是:转速为10~15r/min,拉速为1~2mm/d,降温速率为0.05~0.1℃/h,生长周期为10~15d。经X射线分析确定4种晶体均为β相。利用热重差热分析确定了晶体的熔点和相转变温度,结果表明:Nd∶KGW,Yb∶KGW,Er∶KGW和Er∶Yb∶KGW4种晶体的熔点分别为1085,1086,1080℃和1079℃;相转变温度分别为1023,1021,1021℃和1024℃。分析了晶体产生缺陷的原因。Nd ： KGd（WO4）2（Nd ： KGW）, Yb ： KGW, Er ： KGW and Er ： Yb ： KGW laser crystals were grown by the top seeded solution growth method using K2W2O7 as the flux and doping the rare earth ions of Nd^3＋ , Yb^3＋ , Er^3＋ and Er^3＋ ＋Yb^3＋ into KGd（WO4）2 crystal. The optimum technology parameters obtained are the rotational speed of 10-15 r/rain, lifting speed of 1-2 mm/d, drop in temperature with 0.05-0. 1 ℃/h and the growth period of 10-15 d, X-ray diffraction analysis indi- cates that the crystals grown are β-phase. The melting points and transition temperatures of these crystals were determined by thermogravimetric - differential thermal analysis. The results show that the melting points of the crystals are 1 085, 1 086, 1 080 ℃ and 1 079 ℃, and the phase transition temperatures are 1 023, 1 021, 1 021 ℃ and 1 024 ℃ for Nd ： KGW, Yb ： KGW, Er ： KGW and Er ： Yb ： KGW respectively. The reason for causing crystal defect was analyzed.

关 键 词：稀土离子 钨酸钆钾晶体 晶体生K 顶部籽晶溶液提拉法 

分 类 号：O78[理学—晶体学]