Title:
MnZn-BASED FERRITE
Document Type and Number:
WIPO Patent Application WO/2022/014217
Kind Code:
A1
Abstract:
Provided is an MnZn-based ferrite having both: excellent mechanical characteristics in which the fracture toughness value of a flat plate-like core measured in conformity to JIS R1607 is not less than 1.00 MPa•m1/2; and excellent magnetic characteristics in which the value of an initial permeability, at 23°C and at 100 kHz, of a toroidal core produced in the same condition is not less than 4000. This MnZn-based ferrite comprises a basic component, a sub-component, and unavoidable impurities. In the unavoidable impurities, the respective contained amounts of P, B, Na, Mg, Al, and K are limited to less than 10 mass ppm of P, less than 10 mass ppm of B, less than 200 mass ppm of Na, less than 200 mass ppm of Mg, less than 250 mass ppm of Al, and less than 100 mass ppm of K.
Inventors:
YOSHIDA HIROFUMI (JP)
NAKAMURA YUKIKO (JP)
HIRATANI TATSUHIKO (JP)
TAGAWA TETSUYA (JP)
NAKAMURA YUKIKO (JP)
HIRATANI TATSUHIKO (JP)
TAGAWA TETSUYA (JP)
Application Number:
PCT/JP2021/022196
Publication Date:
January 20, 2022
Filing Date:
June 10, 2021
Export Citation:
Assignee:
JFE CHEMICAL CORP (JP)
JFE STEEL CORP (JP)
JFE STEEL CORP (JP)
International Classes:
C04B35/38; C01G49/00; C01G51/00; H01F1/34
Domestic Patent References:
| WO2018189967A1 | 2018-10-18 | |||
| WO2009093756A1 | 2009-07-30 | |||
| WO2010087514A1 | 2010-08-05 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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