Revista Egitania Sciencia - Volume 8 | ARTICLE

Title: PERMANENT MAGNET MATERIALS

Author: Ângela P. Ferreira (apf@ipb.pt) e Artur F. Costa (acosta@fe.up.pt)

Publication: Revista Egitania Sciencia - Volume 8

Abstract:
Permanent magnet materials play an important role in a wide range of industrial and consumer products. The recent development of rare-earth magnets and their vulgarization have introduced thoughtful changes in electromagnetic and electronic devices with consequences on performance, size and configuration as well as reducing the cost of final products in a way that was not foreseeable just 30 years ago. The broadening of these materials has also stimulated the development of new products and markets. This paper consists in a review of the main aspects related to the permanent magnet materials: a historical evolution perspective is presented as also a basic understanding of the theory of magnetism. The manufacturing technologies and the major classes of commercial permanent magnets close the discussion.

Keywords: permanent magnets, alnicos, ferrites, rare-earth




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