| 摘要 |
<p>Disclosed are a permanent magnet and a manufacturing method for the permanent magnet in which the activity of a calcined body activated by calcination is reduced. An organometallic compound solution, to which an organometallic compound represented by the formula M-(OR)x has been added, is added to a fine powder of a pulverized neodymium magnet, and the organometallic compound is uniformly deposited on the surface of the neodymium magnet grains. Afterwards, the dried magnet grains undergo calcination in hydrogen by being retained in a hydrogen atmosphere for several hours at 200?-900?. Furthermore, the pulverulent calcined body calcined in the hydrogen undergoes hydrogenation by being retained in a vacuum atmosphere for several hours at 200?-600?. Afterwards, a permanent magnet is manufactured by powder compacting and then sintering the pulverulent calcined body. (In the formula, M is Dy or Tb. R is a substituent group comprising a hydrocarbon, and can be a straight chain or a branched chain. x is an arbitrary integer.)</p> |
