Bonded magnet, magnet roll, ferrite powder used therefor and method for producing same

文件类型：PDF文档
文件大小：88K
A ferrite powder for bonded magnets having a magnetoplumbite-type crystal structure, said ferrite powder for bonded magnets having a basic composition represented by the following general formula (A1-xRx)O•n[(Fe1-yMy)2O3] by atomic ratio, wherein A is Sr and/or Ba; R is at least one of the rare earth elements including Y, La being indispensable; M is at least one of the elements Co, Mn, Ni and Zn; and x, y and n are numbers meeting the following conditions 0.01 ≤ x ≤ 0.4, 0.005 ≤ y ≤ 0.04, and 5 ≤ n ≤ 6. Said powder is produced by preparing a ferrite composition having said basic composition by calcination, pulverising or milling the resultant ferrite composition, and heat-treating the pulverised ferrite powder.