Title:
Mn-Zn FERRITE HIGH IN MAGNETIC PERMEABILITY
Document Type and Number:
Japanese Patent JP3653625
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To increase average crystal grain size while suppressing increase in the variation of crystal grain size or abnormal growth of grains, and to obtain high magnetic permeability of Mn-Zn ferrite while suppressing residual stress.
SOLUTION: This ferrite essentially consists of 52.0 to 53.5 mol% Fe2O3, 24.5 to 26.5 mol% MnO and the balance ZnO and contains as a subcomponent, 0.001 to 0.080 mass % MoO3, one or two of PbO and In2O3 by 0.005 to 0.080 mass%, and if desired, either or both of 0.005 to 0.200 mass% CaO and 0.005 to 0.050 mass% SiO2. The ferrite has 35 to 50 μm average crystal grain size and ≤4.0×106N/m2 residual stress.
Inventors:
Osamu Kobayashi
Honda Koji
Shunji Kawasaki
Honda Koji
Shunji Kawasaki
Application Number:
JP19172999A
Publication Date:
June 02, 2005
Filing Date:
July 06, 1999
Export Citation:
Assignee:
Minebea Co., Ltd.
International Classes:
C01G49/00; C04B35/38; H01F1/34; (IPC1-7): C04B35/38; H01F1/34
Domestic Patent References:
| JP4321522A | ||||
| JP5074623A | ||||
| JP5067513A | ||||
| JP6349626A | ||||
| JP61280602A | ||||
| JP58045159A | ||||
| JP8337466A |
Attorney, Agent or Firm:
Calyx
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