【摘要】 以K₂W₂O₇为助溶剂,在钨酸钆钾[KGd（WO₄）₂,KGW]晶体中分别掺入稀土元素离子Nd³⁺,Yb³⁺,Er³⁺和Er³⁺+Yb³⁺,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10¹5r/min,拉速为1²mm/d,降温速率为0.05⁰.1℃/h,生长周期为10¹5d。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。更多还原

【Abstract】 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/min, 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 indicates that the crystals grown are βphase. The melting points and transition temperatures of these crystals were determined by thermogravimetricdifferential 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.更多还原