Journal ArticleDOI
The preparation and some properties of pure misch metal
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In this paper, mixed rare earth oxides derived from bastnasite and monazite ores were purified with respect to non-rare-earth metallic impurities and the molecular weight of the misch metal was determined both directly and by calculation from the chemical composition.Abstract:
Mixed rare earth oxides derived from bastnasite and monazite ores were purified with respect to non-rare-earth metallic impurities. The purified oxide was first converted to the fluoride which was then reduced by calcium to the metal (misch metal). The various misch metals were analyzed for impurities and for the percentage of each rare earth element present. The molecular weight of the misch metal was determined both directly and by calculation from the chemical composition. The melting point, transition temperature and lattice parameters were determined for each batch of metal and compared with values calculated from the respective properties of the pure metals and the percentage of each metal present. The hardness is about the same as those found for the high purity individual metals, while the values of the resistance ratio R 300k R 4.2k were one or two orders of magnitude smaller than those reported for the individual pure metals.read more
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Extractive Metallurgy of Rare Earths
C. K. Gupta,N. Krishnamurthy +1 more
TL;DR: A comprehensive review of the extractive metallurgy of rare earths can be found in this article, where the topics covered are: world rare earth resources and production; ore processing and separation of individual rare earth elements; reduction, refining, and ultrapurification of rare Earth elements; methods for rare earth materials analysis; and a selection of the numerous rare earth applications.
Journal ArticleDOI
Rare Earths and the Balance Problem: How to Deal with Changing Markets?
TL;DR: In this paper, the authors present an overview of the trends in the applications for different rare-earth elements and show that the demand for REEs for use in magnets, catalysts, and alloys is still increasing, while the application of REEs in polishing agents, glass, and ceramics are stable.
Book ChapterDOI
Chapter 54 Intra rare earth binary alloys: Phase relationships, lattice parameters and systematics
TL;DR: In this paper, phase relationships, lattice parameters and systematics of intra rare earth binary alloys are discussed, including a generalized phase diagram as a function of pressure, thermodynamic data, and pertinent references.
Journal ArticleDOI
The Al−Re (Aluminum-Rare earth) systems
References
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Rare earth alloys
TL;DR: In this article, the physical and mechanical properties of rare earth alloys and various metals alloyed with rare earths were studied, and phase diagrams were constructed and analytical data were given for Mg- Nd, Mg Y, mg- Gd, Al Nd and Al Y alloys.
Journal ArticleDOI
The lattice parameters of La, Ce, Pr, Nd, Sm, Eu and Yb
B. J. Beaudry,P. E. Palmer +1 more
TL;DR: In this paper, the lattice parameters of high-purity metals in the form of small-grained wires were determined and the effect of sample preparation on these metals was discussed.
Journal ArticleDOI
The ErY, TbHo, TbEr, DyHo, DyEr and HoEr phase systems
TL;DR: In this article, it was shown that when the atomic number of the components are two or more apart, there may be a very slight negative deviation from linearity which reaches a maximum at the composition where the b.c.d. first starts to form from the melt.
Journal ArticleDOI
Electrical resistivity and magnetic susceptibility of β-cerium from 2 to 300 K
P Burgardt,K.A. Gschneidner,D. C. Koskenmaki,D.K. Finnemore,J. O. Moorman,S Legvold,C. Stassis,T.A. Vyrostek +7 more
TL;DR: In this paper, the electrical resistivity and magnetic susceptibility of allotropically pure and two-phase samples were measured from 2 to 300 K and the results showed that the electrical resistance remains unusually large, g 50 \ensuremath{\mu}\ensureMath{\Omega}cm down to 40 K and below this temperature it drops an order of magnitude.