Mn-Zn ferrite, transformer magnetic core and transformer

Details Mn-Zn ferrite, transformer magnetic core and transformer Mn-Zn ferrite, transformer magnetic core and transformer

2005-06-14

2005-06-14

Koslow, C. Melissa (Department: 1755)

Compositions

Magnetic

Iron-oxygen compound containing

C252S062590, C252S062630, C336S233000, C336S221000

Reexamination Certificate

active

06905629

ABSTRACT:
An Mn—Zn ferrite wherein 0 to 5000 ppm of a Co oxide in a Co3O4conversion is contained in a basic component constituted by Fe2O3: 51.5 to 57.0 mol % and ZnO: 0 to 15 mol % (note that 0 is not included) wherein the rest is substantially constituted by MnO; and a value α in a formula (1) below in said ferrite satisfies α≧0.93.in-line-formulae description="In-line Formulae" end="lead"?α=((Fe2+−Mn3+−Co3+)×(4.29×A+1.91×B+2.19×C+2.01×D))/((A−B−C−D)×100)  formula (1).in-line-formulae description="In-line Formulae" end="tail"?Note that in the formula (1), (Fe2+−Mn3+−Co3+): [wt %], A: Fe2O3[mol %], B: MnO [mol %], C: ZnO [mol %] and D: CoO [mol %]. According to the present invention, a highly reliable Mn—Zn ferrite used as a magnetic core of a power supply transformer, etc. of a switching power supply, etc., having a small core loss in a wide temperature range, furthermore, exhibiting a little deterioration of core loss characteristics under a high temperature (in a high temperature storage test) and having excellent magnetic stability, a transformer magnetic core and a transformer can be provided.

REFERENCES:
patent: 5846448 (1998-12-01), Yasuhara et al.
patent: 6077453 (2000-06-01), Saita et al.
patent: B2 61-11892 (1986-04-01), None
patent: B2 61-43291 (1986-09-01), None
patent: B2 4-33755 (1992-06-01), None
patent: B2 5-21859 (1993-03-01), None
patent: A 6-290925 (1994-10-01), None
patent: A 6-310320 (1994-11-01), None
patent: A 8-191011 (1996-07-01), None
patent: A 9-2866 (1997-01-01), None
patent: A 9-134815 (1997-05-01), None
patent: A 2001-80952 (2001-03-01), None
patent: 2001-80952 (2001-03-01), None
patent: A 2001-220146 (2001-08-01), None
patent: A 2002-231520 (2002-08-01), None
patent: 2002-231520 (2002-08-01), None

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