希土類ボンド磁石の現状と将来

概要

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Bonded rare-earth magnets, which are produced by binding rare-earth magnetic powder with resin, are now widely used in various kinds of small sized electric equipment such as watches, cameras, computer periferals, headphone stereos, and video tape recorders. These magnets not only have advantages related to their magnetic properties, shape flexibility and reliability, but also can be manufactured with relative low cost. Because of these reasons, production amount of the rare-earth bonded magnets has grown rapidly in the last decade. In 1991, thier recorded production was 32 times as high as in 1981. Now much research concerning these materials are actively being conducted. Several kinds of new materials have been found and new process technologies developed. In the future, further improvement in magnetic properties and cost reduction would lead to the large application of these magnets.
社団法人粉体粉末冶金協会の論文