| 摘要 |
PROBLEM TO BE SOLVED: To provide a plastic magnet composition which is capable of producing a high magnetic force in a high-temperature environment and contains Nd-Fe-B powder, ferrite magnetic powder, and resin material. SOLUTION: Nd-Fe-B powder 2 and ferrite magnetic powder 3 are mixed into resin material 4 for the formation of plastic magnet composition. Nd-Fe-B powder 2 is 100 to 400 μm in grain diameter, and Nd-Fe-B powder is nearly 1 μm in average grain diameter. The weight ratio of Nd-Fe-B powder 2 to ferrite magnetic powder 3 is set at 30:70 to 70:30. Furthermore, the weight ratio of the sum of Nd-Fe-B powder 2 and ferrite magnetic powder 3 to resin material 4 is set at 90:10 to 80:20. A plastic magnet 1 formed of the above composition has a structure in which Nd-Fe-B powder 2 is surrounded with ferrite magnetic powder 3 and resin material 4. |
