| 摘要 |
PURPOSE:To obtain a resin-bonded magnet preventive of deteriorating by oxidation during the manufacturing process as well as during the use, by utilizing an anticorrosive intermetallic compound magnetic powder and a synthetic resin which is a bonding agent as the main components, and impregnating the air gap part of a porous molded object formed by hardening and setting the bonding agent after compression molding with a synthetic resin. CONSTITUTION:A title device is expressed by R-Fe-B (R is Nd and/or Pr, or substance obtained by replacing part of those by one or more rare earth elements), and which is mainly composed of an anticorrosive intermetallic compound magnetic powder having as the main components a rare earth metals having its surface covered with phosphate and a transition metal, and of a synthetic resin which is a bonding agent. And after compression molding, the air gap part and the surface of a porous molded object formed by hardening and setting the bonding agent are impregnated and covered with a synthetic resin. As the synthetic resin as the bonding agent, a phnolic resin or other thermosetting resins, and further, polyamide or other thermoplastic resins can be listed as examples. With this, the occurrence of rust and the deterioration by oxidation are prevented, whereby the reduction of the magnetic characteristics due to oxidation can be avoided. |
