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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >The characteristics of chemical vapour transport and mutual separation for the scandium, yttrium and lanthanum mediated by the corresponding gaseous rare earth chloride complexes
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The characteristics of chemical vapour transport and mutual separation for the scandium, yttrium and lanthanum mediated by the corresponding gaseous rare earth chloride complexes

机译：相应的气态稀土氯化物络合物介导的,、钇和镧的化学蒸气传输和相互分离的特征

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摘要

The mutual separation characteristics of rare earths Sc, Y and La from the binary systems R2O3-R'O-2(3) (R: rare earths; R not equal R'=Sc, Y, La) by the chemical vapour transport (CVT) process mediated via RAlnCl3+3n or RKCl4 vapour complex under various different slopes of temperature gradient were investigated. More than 90% of ScCl3 with high purity (98.7% and 94.1%) was obtained from the binary systems Sc2O3-R2O3 (R=Y, La) by only one circle of CVT process under a low temperature gradient. The different CVT characteristics for ScCl3 from other rare earth chlorides RCl3 (R=Y, La) and large separation factors for the binary systems Sc2O3-R2O3 (R=Y, La) were discussed based on the difference in the ionic structure, electronic configuration between Sc and Y or La, and the different volatility of their pure chloride compounds. (C) 1998 Elsevier Science S.A. [References: 35]
机译：稀土Sc，Y和La与二元体系R2O3-R'O-2（3）的相互分离特性（R：稀土; R不等于R'= Sc，Y，La）通过化学气相转移（研究了在各种不同的温度梯度斜率下通过RAlnCl3 + 3n或RKCl4蒸气络合物介导的CVT过程。二元系统Sc2O3-R2O3（R = Y，La）在低温梯度下仅通过一轮CVT加工就获得了90％以上的高纯度ScCl3（98.7％和94.1％）。基于离子结构，电子构型的差异，讨论了ScCl3与其他稀土氯化物RCl3（R = Y，La）不同的CVT特性以及二元体系Sc2O3-R2O3（R = Y，La）的大分离因子在Sc和Y或La之间，以及它们的纯氯化物的挥发性不同。 （C）1998 Elsevier Science S.A. [参考：35]

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