Title:
MAGNETIC CORE AND MANUFACTURING METHOD THEREFOR, AND ON-VEHICLE COMPONENT
Document Type and Number:
Japanese Patent JP2016197720
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a magnetic core suitable for high frequency application, and to provide a manufacturing method therefor.SOLUTION: In a magnetic core including a layered body of an Fe-based nano crystal alloy ribbon, and a resin contained in the layered body, when heating test is performed by raising the temperature, in the atmosphere, from room temperature to 160°C in 20 minutes, and after holding that temperature for 500 hours, lowering the temperature to room temperature by air-cooling, the drop rate of impedance relative permeability μat frequency 100 kHz is less than 5%, before and after the heating test. A manufacturing method for magnetic core includes a step of making a layered body of an Fe-based nano crystal alloy ribbon, a first heat treatment step of precipitating a nano crystal, a second heat treatment step of holding the temperature less than the nano crystallization start temperature in an atmosphere of more oxidative than the atmosphere in the first heat treatment step, and a step of impregnating with resin.SELECTED DRAWING: Figure 1
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Inventors:
MORITSUGU NAKAO
YOSHIDA TAKASHI
HAGIWARA KAZUHIRO
YOSHIDA TAKASHI
HAGIWARA KAZUHIRO
Application Number:
JP2016068443A
Publication Date:
November 24, 2016
Filing Date:
March 30, 2016
Export Citation:
Assignee:
HITACHI METALS LTD
International Classes:
H01F3/04; B22D11/06; C21D6/00; C21D9/00; H01F17/04; H01F27/24; H01F41/02
Domestic Patent References:
| JP2007103404A | 2007-04-19 | |||
| JPS5943882A | 1984-03-12 | |||
| JPH02236259A | 1990-09-19 | |||
| JP2004176167A | 2004-06-24 | |||
| JPS61250162A | 1986-11-07 |
Attorney, Agent or Firm:
Seiji Okuda
Osamu Kita
Michi Kajitani
Osamu Kita
Michi Kajitani