Rare-earth metals like neodymium have very high magnetic anisotropy ... iron oxide can be mixed with ammonium nitrate in a planetary ball mill; after a few days of milling at 600 rpm, the ...
These rare earth magnets contain neodymium and other rare earth elements, which are sourced using unsustainable and environmentally toxic mining practices. Niron’s Clean Earth Magnet ...
It said the "neodymium or 'super strong' rare-earth ... But when accidentally swallowed, the small magnetic ball bearings are forced together in the intestines or bowels, squeezing the tissue ...
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