Invention Grant
US07879469B2 Ferrite magnet powder, sintered magnet, bond magnet, and magnetic recording medium
有权
铁氧体磁体粉末，烧结磁体，粘结磁体和磁记录介质
- Patent Title: Ferrite magnet powder, sintered magnet, bond magnet, and magnetic recording medium
- Patent Title (中): 铁氧体磁体粉末，烧结磁体，粘结磁体和磁记录介质
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Application No.: US10538485Application Date: 2004-02-05
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Publication No.: US07879469B2Publication Date: 2011-02-01
- Inventor: Yoshihiko Minachi , Noboru Ito
- Applicant: Yoshihiko Minachi , Noboru Ito
- Applicant Address: JP
- Assignee: TDK Corporation
- Current Assignee: TDK Corporation
- Current Assignee Address: JP
- Agency: Adli Law Group P.C.
- Agent Dariush G. Adli
- Priority: JP2003-047857 20030225
- International Application: PCT/JP2004/001207 WO 20040205
- International Announcement: WO2004/077458 WO 20040910
- Main IPC: G11B5/65
- IPC: G11B5/65
Abstract:
A ferrite magnet powder is represented by the composition formula AFe2+a(1-x)MaxFe3+bO27, wherein A represents at least one element selected from the group consisting of Sr, Ba, and Pb; and M represents at least one element selected from the group consisting of Zn, Co, Mn, and Ni, and wherein 0.05≦x≦0.80, 1.5≦a≦2.2, and 12≦b≦17. A high saturation magnetization 4πIs can be achieved by the partial substitution of the Fe2+ site of a W-type ferrite with an element M such as Zn within a certain range.
Public/Granted literature
- US20060172151A1 Ferrite magnet powder, sintered magnet, bond magnet, and magnetic recording medium Public/Granted day:2006-08-03
Information query
IPC分类:
