Are There Any Alternatives for Rare-Earth Permanent Magnets? |
M.F. de Campos
Federal Fluminense University (UFF), Av. dos Trabalhadores 420 Volta Redonda RJ, 27255-125 Brazil |
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Iron-based rare-earth permanent magnets are in high demand due to a large number of their applications, including electric cars and cell phones. Alternatives to rare-earth permanent magnets are discussed. Hard ferrites appear to be the simplest option for the replacement of rare-earth magnets due to their easy processing and low cost. The possibilities of replacing NdPrFeB magnets are discussed on the basis of the Bethe-Slater curve. Instead of developing alternatives to rare-earth magnets, research should focus on cheap production of Nd and Pr. |
DOI:10.12693/APhysPolA.146.26 topics: permanent magnets, ferrite magnets, rare-earth magnets, Bethe-Slater curve |