Electric heating – Microwave heating – Cookware
Patent
1994-05-25
1996-06-04
Leung, Philip H.
Electric heating
Microwave heating
Cookware
219759, 426107, 426243, 252 626, 99DIG14, H05B 680
Patent
active
055235492
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.
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Ceramic Powders, Inc.
Leung Philip H.
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