化学气相传输法分离二元混合稀土氧化物  

Separation Characteristics of Binary Mixed Rare Earth Oxides Using Chemical Vapor Transport Process

作　　者：何鹏[1] 苍大强[1] 宗燕兵[1] 孙艳辉[2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]河北理工学院冶金系,河北唐山063009

出　　处：《稀土》2005年第1期53-56,共4页Chinese Rare Earths

摘　　要：以KCl为络合物配体,研究与Y2O3离子半径十分接近的Dy2O3、Ho2O3和Er2O3的分离特性以及重稀土氧化物Ho2O3-Er2O3、Er2O3-Tm2O3、Tm2O3-Yb2O3及Yb2O3-Lu2O3之间的分离特性。实验结果表明,分离后主要沉积位置在中温和低温区。不同温度区域的最大分离系数分别为,SFY/Dy=11.49,SFY/Ho=15.28,SFY/Er=6.37。说明Y-Dy、Y-Ho及Y-Er控制一定的温度梯度完全可以达到分离目的。SFHo/Er=1.40,SFEr/Tm=2.21,SFTm/Yb=1.38,SFYb/Lu=4.33,高于传统的湿法分离系数。The separation characteristics of binary oxides mixture Y_2O_3-Dy_2O_3 ,Y_2O_3- Ho_2O_3,Y_2O_3-Er_2O_3 and Ho_2O_3-Er_2O_3,Er_2O_3-Tm_2O_3,Tm_2O_3-Yb_2O_3, Yb_2O_3-Lu_2O_3 transport reaction have been investigated using a stepwise chlorination-chemical vapor.The result shows that the main deposition temperature of the chlorides is low and mid.The largest separation factor value for Y_2O_3-Dy_2O_3 ,Y_2O_3- Ho_2O_3,Y_2O_3-Er_2O_3,which expressed as atomic ratio for the resulting chlorides,are SF_(Y/Dy)=11.49,SF_(Y/Ho)=15.28,SF_(Y/Er)=6.37.The largest separation factor value for Ho_2O_3-Er_2O_3,Er_2O_3-Tm_2O_3,Tm_2O_3-Yb_2O_3,Yb_2O_3-Lu_2O_3 are SF_(Ho/Er)=1.40,SF_(Er/Tm)=2.21,SF_(Tm/Yb)=1.38,SF_(Yb/Lu)=4.33, which are much higher than of the conventional wet process.

关 键 词：稀土 化学气相传输 稀土氧化物 稀土分离 

分 类 号：TQ028.8[化学工程]