Purification of neodymium and lanthanum by electron beam floating zone melting

Kouji Mimura, Minoru Isshiki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Removal of non-metallic and metallic impurities from neodymium and lanthanum has been examined by the electron beam floating zone melting (EBFXM) technique in a high vacuum. The carbon and sulfur contents are found to be reduced by their redistribution caused by the zone pass, while the reduction of oxygen and nitrogen contents are scarcely observed for neodymium. Metallic impurities having vapor pressures higher than neodymium and lanthanum, such as calcium and magnesium, can be removed through the vaporization. On the other hand, iron, silicon and copper can be redistributed during zone passes. The residual resistivity ratios of neodymium and lanthanum increase after the EBFZM as a result of the reduction of respective impurities.

Original languageEnglish
Title of host publicationFirst International Conference on Processing Materials for Properties
PublisherPubl by Minerals, Metals & Materials Soc (TMS)
Pages897-900
Number of pages4
ISBN (Print)0873392566
Publication statusPublished - 1993 Dec 1
EventProceedings of the 1st International Conference on Processing Materials for Properties - Honolulu, HI, USA
Duration: 1993 Nov 71993 Nov 10

Publication series

NameFirst International Conference on Processing Materials for Properties

Other

OtherProceedings of the 1st International Conference on Processing Materials for Properties
CityHonolulu, HI, USA
Period93/11/793/11/10

ASJC Scopus subject areas

  • Engineering(all)

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