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US20080044679: Soft Magnetic Material, Powder Magnetic Core, Method for Manufacturing Soft Magnetic Material, and Method for Manufacturing Powder Magnetic Core

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Filing Information

Inventor(s) Toru Maeda · Kazuyuki Maeda · Yasushi Mochida · Koji Mimura ·
Assignee(s) SUMITOMO ELECTRIC INDUSTRIES, INC. ·
Correspondent OSHA LIANG L.L.P. ·
Application Number US11793984
Filing date 07/19/2006
PCT 371 date 06/25/2007
Publication date 02/21/2008
Predicted expiration date 07/19/2026
U.S. Classifications 428/546  · 427/127  · 419/38  · 252/62.51R  ·
International Classifications B22F312  · H01F124  · H01F4102  ·
Kind CodeA1
PCT Application Number WO20PCTJP0614263 - 07/19/2006
Foreign Priority JP2005274124 - 09/21/2005 ·
10 Claims, 4 Drawings


Abstract

A soft magnetic material includes a plurality of composite magnetic particles (40) each including a metal magnetic particle (10) and an insulation coating (20) covering the surface of the metal magnetic particle (10), wherein the insulation coating (20) contains Si (silicon), and 80% or more of Si contained in the insulation coating constitutes a silsesquioxane skeleton. Therefore, it is possible to effectively decrease a hysteresis loss while suppressing an increase in eddy-current loss.

Independent Claims | See all claims (10)

  1. 1. A soft magnetic material comprising a plurality of composite magnetic particles (40) each including a metal magnetic particle (10) and an insulation coating (20) covering the surface of the metal magnetic particle, wherein the insulation coating contains Si, and 80% or more of Si contained in the insulation coating constitutes a silsesquioxane skeleton.
  2. 7. A powder magnetic core comprising a plurality of composite magnetic particles (40) each including a metal magnetic particle (10) and an insulation coating (20) covering the surface of the metal magnetic particle, wherein the insulation coating contains Si, and 80% or more of Si contained in the insulation coating constitutes a silsesquioxane skeleton and a silica skeleton represented by (Si—Ox)n wherein x>1.5.
  3. 8. A method for manufacturing a soft magnetic material comprising a step of forming an insulation coating (20) on a metal magnetic particle (10), wherein 80% or more of Si contained in the insulation coating constitutes a silsesquioxane skeleton.

References Cited

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Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US7544417 Sumitomo Electric Industries, Ltd. Toru Maeda et al. Jun 2009
US8236420 Hgans AB (Publ) Bjrn Skrman et al. Aug 2012
US8647743 --

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