Rare earth metals, such as metallic neodymium and metallic didymium (metallic praseodymium-neodymium), are used for rare earth magnets, mainly neodymium-iron-boron magnet.
The results show that rare earth elements can efficiently improve the structures of the Chromvanadizing layer, the rate of growth and properties of diffusion layer.
This review summaries the application of ion exchangers in the separation and determination of alkali metals, alkali-earth metals, noble metals, rare earth elements and actinoid.