专利名称：OXIDE MAGNETIC MATERIAL, FERRITE
wingatePARTICLE, SINTERED MAGNET, BONDED
blueiceMAGNET, MAGNETIC RECORDING MEDIUM
AND MOTORjtag
发明人：TAGUCHI, HITOSHI,IIDA,
KAZUMASA,MASUZAWA,
船期英语KIYOYUKI,MINACHI, YOSHIHIKO
commercialisation>健怡可乐
申请号：EP98905643
申请日：19980225
公开号：EP0905718A4
英文话剧剧本
公开日：
植树节英文
20001129
专利内容由知识产权出版社提供
摘要：There are provided a ferrite magnet having a high residual magnetic flux density and a high coersive force, that have not been accomplished by conventional hexagonal system ferrite magnets, by realizing a hexagonal system ferrite having a high saturation magnetization and a high magnetic anisotropy, a ferrite magnet having extremely excellent characteristics of the coersive force, and a coersive force which does not much drop particularly in a low temperature range, a ferrite magnet produced using relatively coar ferrite particles having a grain size of above 1µm and having a high residual magnetic flux density and a high coersive force, and a magnetic recording medium having a
high residual magnetic flux density and being thermally stable. Ferrite particles, a sintered magnet, a bonded magnet, a magnetic recording medium, etc., are constituted by using an oxide magnetic material comprising an oxide magnetic material which contains a ferrite having a hexagonal system structure as the main pha and having a composition
comprising 1 to 13 at% of A, 0.05 to 10 at% of R, 80 to 95 at% of Fe and 0.1 to 5 at% of M bad on the total of the metal elements of A, R, Fe and M to where A is at least one kind of elements lected from the group of Sr, Ba, Ca and Pb and esntially including Sr, R is at least one kind of elements lected from rare earth elements (inclusive of Y) and Bi and esntially including La and M is Co alone, or both Co and Zn.
bulletproof>onex申请人：TDK CORPORATION
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