Ni-Zn type ferrite

Details Ni-Zn type ferrite Ni-Zn type ferrite

1997-11-19

1999-03-02

Bonner, Melissa

Compositions

Magnetic

Iron-oxygen compound containing

252 6262, C04B 3530

Patent

active

058766189

ABSTRACT:
A Ni--Zn type ferrite has the composition represented by the general formula: Ni.sub.X Zn.sub.1-X Fe.sub.2-Y-Z Mn.sub.Y Zr.sub.Z O.sub.4 (0.55.ltoreq.X.ltoreq.0.80, 0.001.ltoreq.Y.ltoreq.0.20, 0.001.ltoreq.Z.ltoreq.0.04). The Ni--Zn type ferrite is formed with the step described below. A raw powder is first mixed for 64 hours and then fired at 850.degree. C. in an oxygen atmosphere for two hours. Next, the fired powder is crushed and then the crushed powder is again mixed. Then, a binder is added to the resulting powder, which is then press-formed under a pressure of 2.5 ton/cm.sup.2, and the press-formed powder is sintered at 1350.degree. C. for 5 hours in an oxygen atmosphere.

REFERENCES:
patent: 4521323 (1985-06-01), Hirota et al.
patent: 4808327 (1989-02-01), Rousset et al.
patent: 5089159 (1992-02-01), Tchernev

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