2016-3-27 · 1 James Hedrick, "Rare Earths," from Mineral Commodity Summaries, U.S. Bureau of Mines, January 1995, pp. 134-135. 2 U.S. Environmental Protection Agency, Technical Background Document, Development of the Cost, Economic ,and Small Business Impacts Arising from …
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2016-10-24 · and had the composition of (14–14.5) at% TRE (Total Rare Earth)-Co-B-M-bal. Fe (M˛=˛ Cu, Al, Ga, Zr). The rare-earth elements contained in the alloys were Nd and Pr, and the amount of others was negligibly small. The raw alloys were coarsely pulverized by a hydrogen grinding method followed by ˜ne pulverization by a jet mill-Online Consulting
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2018-11-9 · grinding. This process thus did not provide any distinct advantages over conventional processing techniques. Plasma spheroidization and plasma annealing currently yields particles having reduced coercivities. This, however, does not exclude these powders as starting materials for powder metallurgical processing of rare earth-cobalt magnets,Online Consulting
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2019-2-19 · the ball mill discharge point to replace a trommel screen. It consists of a barrel or “blind trommel” that is mechanically attached to the trunnion or discharge of a ball mill. The barrel rotates around a fixed assembly of ferrite and rare earth magnets positioned on the outside of the barrel.Online Consulting
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We have measured the contamination of samples of granite, quartz porphyry, greenstone and dolerite after grinding them in steel and cemented carbide grinding mills. The steel mill contaminated the granite with Fe. The cemented carbide mill contaminated all samples with W and Co, and the granite and quartz porphyry with Ta.Online Consulting
Site Occupancy Of Rare
A systematic study on the site occupancy of rare-earth cations in Ba-rich and Ti-rich BaTiO3 ﬁred in reducing atmosphere is performed. The corresponding lattice relaxation is used as an indicator of site occupancy and, to a lesser extent, defect structures.Online Consulting
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