Mn-Zn ferrite containing less than 50 mol % Fe 2 O 3

Details Mn-Zn ferrite containing less than 50 mol % Fe 2 O 3 Mn-Zn ferrite containing less than 50 mol % Fe 2 O 3

2006-01-10

2006-01-10

Koslow, C. Melissa (Department: 1755)

Compositions

Magnetic

Iron-oxygen compound containing

C252S062590, C252S062600, C252S062630

Reexamination Certificate

active

06984338

ABSTRACT:
An Mn—Zn ferrite includes base components of 44.0 to 49.8 mol % Fe2O3, 4.0 to 26.5 mol % ZnO, 0.8 mol % or less Mn2O3, and the remainder consisting of MnO, and contains 0.20 (0.20 excluded) to 1.00 mass % CaO as additive. Since the Mn—Zn ferrite contains less than 50.0 mol % Fe2O3and a limited amount (0.8 mol % or less) of Mn2O3, an abnormal grain growth does not occur even if CaO content is more than 0.20 mass %, and a high electrical resistance can be gained thereby realizing an excellent soft magnetism in a high frequency band such as 1 MHz.

REFERENCES:
patent: 6077453 (2000-06-01), Saita et al.
patent: 6547984 (2003-04-01), Kobayashi et al.
patent: 07-230909 (1995-08-01), None
patent: 10-208926 (1998-08-01), None

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