Title:
Ni-BASED FERRITE AND COIL PART USING THE SAME
Document Type and Number:
Japanese Patent JP2020152603
Kind Code:
A
Abstract:
To provide a Ni-based ferrite having a small coercive force Hc, a large initial magnetic permeability μi, and a large magnetic flux density at a predetermined applied magnetic field, and a coil part using the same.SOLUTION: The Ni-based ferrite has the initial magnetic permeability μi of 600 or more at 20°C, the coercive force Hc of less than 50 A/m, and the magnetic flux density B4k of 360 mT or more at the applied magnetic field of 4 kA/m, and a chemical composition of the Ni-based ferrite is expressed as Fe2O3 of 45.5 mol% or more and 47.0 mol% or less, ZnO of 28.0 mol% or more and 30.0 mol% or less, CuO of 7.5 mol% or more and 9.0 mol% or less, MnO of 1.2 mol% or more and 4.2 mol% or less, and NiO as balance, and, a total amount of Fe2O3 and MnO is more than 48.2 mol% and less than 49.8 mol%.SELECTED DRAWING: Figure 1
Inventors:
TANAKA SATOSHI
KOYUHARA TOKUKAZU
KOYUHARA TOKUKAZU
Application Number:
JP2019051780A
Publication Date:
September 24, 2020
Filing Date:
March 19, 2019
Export Citation:
Assignee:
HITACHI METALS LTD
International Classes:
C04B35/30; C01G49/00; C01G53/00; H01F1/34; H01F17/04
Domestic Patent References:
| JP2014169194A | 2014-09-18 | |||
| JP2006193343A | 2006-07-27 | |||
| JPH01212234A | 1989-08-25 | |||
| JP2006282437A | 2006-10-19 | |||
| JP2015043459A | 2015-03-05 | |||
| JP2006151743A | 2006-06-15 |
Foreign References:
| CN1587193A | 2005-03-02 |