公开(公告)号：US20140011055A1

公开(公告)日：2014-01-09

申请号：US14022554

申请日：2013-09-10

Applicant: FUJIFILM Corporation

Inventor： Hiroyuki SUZUKI ,  Nobuo YAMAZAKI

IPC: G11B5/712

CPC classification number: G11B5/712 ,  B82Y30/00 ,  C01G49/0018 ,  C01G49/0036 ,  C01P2006/12 ,  C01P2006/42 ,  C04B35/2683 ,  C04B35/6262 ,  C04B35/62665 ,  C04B35/62813 ,  C04B2235/3215 ,  C04B2235/3218 ,  C04B2235/3251 ,  C04B2235/3274 ,  C04B2235/3275 ,  C04B2235/3284 ,  C04B2235/3409 ,  C04B2235/5409 ,  C04B2235/5454 ,  C04B2235/767 ,  G11B5/70678 ,  G11B5/714 ,  H01F1/0315 ,  H01F1/11 ,  Y10T428/2982

Abstract: An aspect of the present invention relates to a method of manufacturing a hexagonal ferrite magnetic particle comprising melting an Al-containing starting material mixture to prepare a melt and quenching the melt to obtain an amorphous material; subjecting the amorphous material to heat treatment to cause a hexagonal ferrite magnetic particle to precipitate in a product obtained by the heat treatment; collecting a hexagonal ferrite magnetic particle by subjecting the product to treatment with an acid and washing, wherein the hexagonal ferrite magnetic particle collected has a particle size ranging from 15 to 30 nm, comprises 0.6 to 8.0 weight percent of Al, based on Al2O3 conversion, relative to a total weight of the particle, and Al adheres to a surface of the hexagonal ferrite magnetic particle.

Abstract translation: 本发明的一个方面涉及一种制造六方晶系铁氧体磁性颗粒的方法，包括熔化含Al原料混合物以制备熔体并淬火熔体以获得无定形材料; 使无定形材料进行热处理，使六方晶系铁氧体磁性颗粒在通过热处理获得的产品中沉淀; 收集六方晶系铁氧体磁性颗粒，通过酸处理和洗涤进行处理，其中收集的六方晶系铁氧体磁性颗粒具有15至30nm的粒度，包含基于Al 2 O 3转化率的0.6至8.0重量％的Al， 相对于颗粒的总重量，Al附着到六方晶系铁氧体磁性颗粒的表面。

公开(公告)号：US20130256584A1

公开(公告)日：2013-10-03

申请号：US13839619

申请日：2013-03-15

Applicant: FUJIFILM CORPORATION

Inventor： Nobuo YAMAZAKI ,  Hiroyuki SUZUKI

IPC: H01F1/01

CPC classification number: H01F1/01 ,  C01G49/0036 ,  C01P2004/04 ,  C01P2006/42 ,  C04B35/2683 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3251 ,  C04B2235/3284 ,  C04B2235/421 ,  C04B2235/442 ,  C04B2235/767 ,  H01F1/11

Abstract: An aspect of the present invention relates to a method of manufacturing hexagonal strontium ferrite magnetic powder, which comprises melting a starting material mixture which has a composition, as a composition converted into an oxide, lying within a region enclosed by the following four points: (a) SrO=48.0 mol %, Fe2O3=17.2 mol %, B2O3=34.8 mol %; (b) SrO=55.9 mol %, Fe2O3=17.7 mol %, B2O3=26.4 mol %; (c) SrO=41.7 mol %, Fe2O3=40.9 mol %, B2O3=17.4 mol %; (d) SrO=36.7 mol %, Fe2O3=40.1 mol %, B2O3=23.2 mol %; in a ternary diagram with SrO, Fe2O3, which may include an Fe substitution element, and B2O3 as apexes, to provide a melt, and quenching the melt to obtain a solidified product; and heat treating the solidified product to precipitate hexagonal strontium ferrite magnetic particles within the solidified product.

Abstract translation: 本发明的一个方面涉及一种制造六方锶铁氧体磁粉的方法，该方法包括将具有组成的原料混合物熔化成转化为氧化物的组合物，该组合物位于由以下四点包围的区域内：（ a）SrO = 48.0mol％，Fe 2 O 3 = 17.2mol％，B 2 O 3 = 34.8mol％; （b）SrO = 55.9mol％，Fe2O3 = 17.7mol％，B2O3 = 26.4mol％; （c）SrO = 41.7摩尔％，Fe2O3 = 40.9摩尔％，B2O3 = 17.4摩尔％ （d）SrO = 36.7mol％，Fe2O3 = 40.1mol％，B2O3 = 23.2mol％; 具有可包括Fe取代元素和B 2 O 3作为顶点的SrO，Fe 2 O 3的三元图，以提供熔体，并淬火熔体以获得固化产物; 对固化物进行热处理，使固体成分中的六方锶铁氧体磁性粒子析出。