掺锌铌酸锂（LiNbO3：Zn）晶体的物性测量

本文配制了系列掺锌铌酸锂多晶料，测量了掺锌铌酸锂的熔化温度及居里温度随掺锌量的变化。用熔融提拉法生长了不同掺锌量的铌酸锂单晶。研究了锌在晶体中的分凝、晶体的抗光折变能力和倍频转换效率。实验结果表明：（１）在铌酸锂晶体中，随掺锌量的增加，ＬｉＮｂＯ３：Ｚｎ的熔化温度呈下降趋势，而居里温度线性上升。（２）在掺锌铌酸锂晶体中，调节锌的掺杂量，可以找到分凝系数近于１的掺锌浓度。（３）当掺锌量大于７ｍｏ１％时，ＬｉＮｂＯ３：Ｚｎ晶体与ＬｉＮｂＯ３：Ｍｇ具有同样的抗光折变能力，前者的倍频转换效率比后者稍大。

MEASUREMENT OF PHYSICAL PROPERTIES IN ZINC-DOPED LITHIUM NIOBATE (LiNbO_3:Zn)

This paper synthesized a series of zinc-doped lithium niobate polycrystals,and measured the melting temperature and Curie temperature of LiNbO3:Zn versus the zinc concentration. Single crystals of LiNbO3:Zn were grown by Czochralski,and the distribution of Zn in LiNbO3: Zn,the ability to withstand photorefraction and the second harmonic generation(SHG) efficiency were measured.The results show that:(1) the melting temperature decreases with increase of Zn concentration,while the Curie temperature increases linearly.(2)through changing the Zn content,a concentration of Zn, whose distribution coefficient equals l be found.(3) LiNbO3:Zn(>7mol%)has the same ability to resist photorefraction as LiNbO3:Mg(>4. 6mol%), and the second harmonic generation efficiency of the former is slightly higher than that of the latter.