Patent ID: 6383406
Filing Date: 2002-05-07
Classification: H01F

Abstract:
A method for producing a magnetically anisotropic magnetic material, the method comprising the steps of:a. synthesizing metal amides; b. aminolyzing, polymerizing and condensing said metal amides to produce polymerized metal amides precursor; and c. heating said polymerized metal amides precursor at a temperature within the range of 500Â° C. to 700Â° C. in an inert or reduced atmosphere for a period of time between 1 to 5 hours to produce magnetic powder having a main phase of formula: R&khgr;(Fe1âˆ’&dgr;M&dgr;)yN&agr;C&bgr;â€ƒwherein R is at least one element selected from Nd, Pr, La, Ce, Th, Dy, Ho, Er, Eu, Sm, Gd, Pm, Tm, Yb, Lu, and Y; M is at least one element selected from Ti, V, Cr, Mn, Fe, Co, Ni, Zr, Nb, Mo, Hf, Ta, W, B, Al, Si, P, Ga, Ge, and As; &khgr; is 0.1-8.5; y is 14-19; &dgr; is 0-0.95; &agr; is 0.05-4; and &bgr; is 0-4.