Permanent magnet

Abstract

Abstract PURPOSE:To obtain a magnetically anisotropic sintered permanent magnet improved in its temp. characteristic, by preparing an alloy containing the specified amounts of Fe, B, rare earth elements and Co. CONSTITUTION:An alloy comprising, by atomic percentage, 8-30% R (wherein R is at least one of rare earth elements including Y), 2-28% B, Co <=50% (except 0%), and the balance Fe and inevitable impurities is prepared. As said rare earth elements R, one or more of Nd, Pr, La, Y, etc. are used. As B, pure B or ferroboron is used. The permanent magnet formed out of said alloy exhibits magnetic properties such as coercive force Hc >=1 KOe and residual magnetic flux density Br >=4 KG, and its maximum energy product (BH)max is similar to or more than that of hard ferrite (- about 4 MGOe).

Inventors

• 👤 Masato Sagawa
• 👤 眞人 佐川
• 👤 Setsuo Fujimura
• 👤 藤村　節夫
• 👤 Yutaka Matsuura
• 👤 裕 松浦

Bibliographic Details