T. Itakura, R. Sasai, H. Itoh
Feb 9, 2006
Citations
1
Influential Citations
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Journal
Journal of Alloys and Compounds
Abstract
Abstract The hydrothermal treatment of used Nd–Fe–B sintered permanent magnet was investigated in order to recover the rare-earth resources efficiently. Commercially available Ni-coated Nd 2 Fe 14 B sintered magnet was hydrothermally treated under the optimum conditions at 110 °C for 6 h in the mixed aqueous solution of hydrochloric acid (3.0 mol/dm 3 ) and oxalic acid (0.2 mol/dm 3 ). As a result, more than 99% of Nd metal contained in the magnet was collected as solid precipitate of Nd 2 (C 2 O 4 ) 3 · x H 2 O with the purity as high as 99.8%.