MISC

1998年1月30日

Mutual separation characteristics for the yttrium and lanthanides with chemical vapor transport process mediated by metal chloride gaseous complexes

Journal of Alloys and Compounds
  • Tetsuya Ozaki
  • ,
  • Jianzhuang Jiang
  • ,
  • Kuniaki Murase
  • ,
  • Ken-Ichi Machida
  • ,
  • Gin-Ya Adachi

265
1-2
開始ページ
125
終了ページ
131
記述言語
英語
掲載種別
DOI
10.1016/S0925-8388(97)00302-2
出版者・発行元
Elsevier BV

The chemical vapor transport (CVT) efficiency for pure yttrium chloride YCl3 mediated via RA1nCl3+3n vapor complex was measured and compared with those of lanthanoid chloride LnCl3 (Ln=Dy, Ho, Er), in which these four kinds of rare earth ion R(III), especially Ho, Y and Er, have very similar ionic radius values. Mutual separation of the binary systems YCl3-LnCl3 and Y2O3-Ln2O3 (Ln=Dy, Ho, Er) was conducted by the CVT process via the gaseous complexes RKCl4. The "unexpected" CVT experimental results, both expressed as the lowest CVT efficiency and the lowest gaseous complex stability for YCl3 with respect to the ionic radius of Y(III) compared with those of LnCl3 (Ln=Dy, Ho, Er), were observed and discussed on the basis of the difference in the ionic structure and electronic configuration of Y(III) with those of Ln(III) (Ln=Dy, Ho, Er). Further, the improved separation factor of βEr/Y (1.52) and βDy/Y (1-35) were obtained by optimizing both the temperature gradient and the flow rate of the carrier gases for these systems. © 1998 Elsevier Science S.A.

リンク情報
DOI
https://doi.org/10.1016/S0925-8388(97)00302-2
ID情報
  • DOI : 10.1016/S0925-8388(97)00302-2
  • ISSN : 0925-8388
  • SCOPUS ID : 0031648405

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