A comparative study of mutual separation characteristics for binary mixed oxides Y2O3-Ln2O3 (Ln=Sc, La, Nd and Sm) using stepwise chlorination-chemical vapor transport reaction mediated by vapor complexes LnAlnCl3n+3

被引：13

作者：

Sun, YH ^{[1
]}

Zhang, LQ

Wang, ZC

Guo, L

机构：

[1] Hebei Inst Technol, Dept Met, Tangshan 063009, Hebei, Peoples R China

[2] NE Univ, Dept Chem, Shenyang 110006, Peoples R China

[3] Chinese Acad Sci, Inst Appl Ecol, Shenyang 110015, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 306卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

separation; stepwise chlorination-chemical vapor transport reaction; binary oxide mixtures Y2O3-Ln(2)O(3) (Ln=Sc; La; Nd and Sm); rare earth vapor complexes; LnAl(n)Cl(3n+3); vapour deposition; thermodynamic properties;

D O I：

10.1016/S0925-8388(00)00770-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Mutual separation characteristics for binary oxide mixtures Sc2O3-Y2O3, Y2O3-La2O3, Y2O3-Nd2O3 and Y2O3-Sm2O3 using a stepwise chlorination-chemical vapor transport (SC-CVT) reaction have been investigated. The total transported yields of the chlorides produced from the oxide mixtures is in the order of YCl3>NdCl3>SmCl3>LaCl3>ScCl3, the main deposition temperature of the chlorides is in the increasing order of ScCl3<YCl(3)approximate to SmCl3<NdCl3<LaCl3, and the largest separation factor values of 29.9 for Y:Sc, 84.5 for Y:La, 9.09 for Nd:Y and 2.46 for Sm:Y were observed, respectively. The results were discussed on the difference of Sc and Y on the one side and lanthanides (La, Nd and Sm) elements on the other hand. Furthermore, the selective chlorination characteristics of binary oxide mixtures were studied compared with that of the pure rare earth oxide. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：146 / 150

页数：5

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