Ferrite compositions for use in a microwave oven

Details Ferrite compositions for use in a microwave oven Ferrite compositions for use in a microwave oven

1997-06-02

2000-06-20

Koslow, C. Melissa

Compositions

Magnetic

Iron-oxygen compound containing

252 6262, 252 626, 252 6263, 252 6264, 219730, 219759, C04B 3526, H05B 680

Patent

active

060774541

ABSTRACT:
A ferrite composition is created by adding a high Curie temperature ferrite, such as lithium ferrite, to a soft magnetic ferrite, such as magnesium manganese zinc ferrite. The composition is used in a microwave oven dish or laminate wrap to crisp or brown food by maintaining the food at a desired temperature during microwave operation. The high Curie temperature ferrite is preferably selected from the group consisting of lithium ferrite, nickel ferrite, copper ferrite, magnesium ferrite, strontium ferrite, barium ferrite, manganese ferrite, strontium zinc ferrite, barium zinc ferrite, and mixtures thereof. Additionally, the preferred process of making the new ferrite composition for use in microwave browning dishes includes the low-cost method of sintering raw materials in an air atmosphere. A browning plate including the ferrite compositions, and a microwave oven suitable for use with the browning plate are also disclosed.

REFERENCES:
patent: 4362917 (1982-12-01), Freedman et al.
patent: 4454403 (1984-06-01), Teich et al.
patent: 5523549 (1996-06-01), Tenzer
patent: 5665819 (1997-09-01), Tenzer

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