Patent ID: 6468440
Filing Date: 2002-10-22
Classification: H01F

Abstract:
A magnet powder comprising a composition expressed by:general formula:(R1xR2yBzT100âˆ’Xâˆ’Yâˆ’Z)100âˆ’QNQ wherein R1 is at least one kind of element selected from rare earth elements, R2 is at least one kind of element selected from Zr, Hf and Sc, T is at least one kind of element selected from Fe and Co, and X, Y, Z and Q are numbers satisfying 2 atomic %&lE;X, 0.01 atomic %&lE;Y, 4&lE;X+Y&lE;20 atomic %, 0&lE;Z&lE;10 atomic %, and 0.1&lE;Q&lE;20 atomic %, respectively, and having a TbCu7 crystal phase as a principal phase; wherein an amount of a fine particle having a maximum diameter of 22 &mgr;m or less in the magnet powder is 20% by weight or less.