Title:
CLOSED MAGNETIC CIRCUIT MAGNETIC CORE AND METHOD FOR MANUFACTURING THE SAME
Document Type and Number:
WIPO Patent Application WO/2007/119412
Kind Code:
A1
Abstract:
This invention provides a closed magnetic circuit magnetic core formed of a nanocrystal
alloy having high saturated magnetic field and high space factor, and a method
for manufacturing the same. An amorphous alloy material having a composition
represented by Fe100-a-b-cMaSibBc
(atomic%) is wound to prepare a wound magnetic core. While applying a pressure
of not less than 5 MPa and not more than 500 MPa to the circumferential side face
of the wound magnetic core, the wound magnetic core is heat treated for nanocrystallization
to manufacture a closed magnetic circuit magnetic core having a saturated magnetic
field of not less than 200 A/m and a space factor of not less than 80%. The closed
magnetic circuit magnetic core is preferably in a wound magnetic core form.
Inventors:
YOSHIZAWA, Yoshihito (546-1, Kokusaiji Fukaya-sh, Saitama 33, 3660033, JP)
吉沢 克仁 (〒33 埼玉県深谷市国済寺５４６－１ Saitama, 3660033, JP)
吉沢 克仁 (〒33 埼玉県深谷市国済寺５４６－１ Saitama, 3660033, JP)
Application Number:
JP2007/055468
Publication Date:
October 25, 2007
Filing Date:
March 19, 2007
Export Citation:
Assignee:
HITACHI METALS, LTD. (1-2-1, Shibaura Minato-k, Tokyo 14, 1058614, JP)
日立金属株式会社 (〒14 東京都港区芝浦一丁目２番１号 Tokyo, 1058614, JP)
YOSHIZAWA, Yoshihito (546-1, Kokusaiji Fukaya-sh, Saitama 33, 3660033, JP)
日立金属株式会社 (〒14 東京都港区芝浦一丁目２番１号 Tokyo, 1058614, JP)
YOSHIZAWA, Yoshihito (546-1, Kokusaiji Fukaya-sh, Saitama 33, 3660033, JP)
International Classes:
H01F3/04; C22C38/00; H01F1/14; H01F27/25; H01F41/02; H01F3/00; C22C38/00; H01F1/12; H01F27/25; H01F41/02
Attorney, Agent or Firm:
HORI, Shiroyuki et al. (1F Shoyu-kaikan Bldg, 3-3-1 Kasumigaseki, Chiyoda-k, Tokyo 13, 1000013, JP)