双掺离子在KTNNP晶体生长中的协同效应研究

Study on Cooperation Effect of Dopant Ions in Growth of KTNNP Crystals

本文采用高温溶液法生长了不同掺质浓度的较大尺寸掺Nd3+ 和Nb5+ KTP(KTNNP)晶体 ,以X射线单晶衍射仪测定了所生长晶体的晶胞参数 ,以等离子发射光谱 (ICP AES)法系统测定了晶体中的掺质浓度。实验结果显示 ,掺Nd3+ 和Nb5+ 后 ,KTP晶体生长习性和形态发生了很大的变化 ,而且体系中Nd3+ 的分配系数明显增大 ,并随Nb5+ 浓度的增大而增大 ,从而体现了Nb5+ 对Nd3+ 的协同效应。另外 ,掺质后 ,晶体的单胞体积一般略有增大 ,但未呈现出规律性。

The Nd 3+ and Nb 5+ doped KTP(KTNNP) crystals with different dopant concentrations have been grown in high temperature solutions.The lattice parameter of the crystals have been determined by X ray diffractometer,and the concentrations of the dopants in the crystals have been measured systematically by ICP AES.The result of the experiments shows that the growth habit and the morphology of KTP crystal have changed greatly and the distribution coefficient of Nd 3+ has increased obviously after the doping of Nd 3+ and Nb 5+ in the crystal growth system,the latter incarnates the cooperation effect of Nb 5+ on Nd 3+ .Otherwise,the volume of the crystal unit cell increase slightly with no regularity after doping.