Samarium oxide produced by precipitation stripping usually results in high surface area, plate-like particle morphology, as opposed to the lower surface area, rod morphology of traditionally produced samarium oxide. In this study, Sm<sub>2</sub>Co<sub>17</sub> magnets were dissolved in nitric acid, and samarium ions were preferentially extracted from transition metals with mono-2-ethylhexyl-(2-ethylhexyl) phosphonic acid (MEHEHP) in a hydrocarbon diluent. Samarium oxalate was directly precipitated from the loaded organic phase with a saturated aqueous solution of oxalic acid. The samarium oxalate was then roasted to produce samarium oxide, and the particle morphology was observed using SEM. This study attempts to control the particle morphology of samarium oxide by altering the oxalic acid stripping solution, and changing the oxalate roasting times and temperatures.

Morphological control of samarium oxide particles produced via precipitation stripping

251st National Meeting (2016)

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