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US 4,472,369 AGranted
Process for producing ferrites
AssigneeJapan Metals & Chemicals Co., Ltd.
InventorsKoichi Kambe, Tsugunori Honda, Toshio Toyota, Mitsuharu Tominaga, Koichi Yoshioka
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Abstract
Ferrite having a uniform degree of oxidation is produced at a higher rate of ferrite forming reaction by pelletizing a mixture of iron oxide and ferromanganese powders and calcining the mixture at a temperature of 900.degree. C. or higher. Zinc oxide, magnesium oxide and/or nickel oxide may be further added to the mixture, as required.
Claims2
A process for producing ferrites comprising the steps of:
- preparing a mixture of iron oxide powder and ferromanganese powder;
- pelletizing the resultant mixture;
- and
- calcining the resultant pellet at a temperature of 900.degree. C. or higher to oxidize the pellet.
1 more element
A process for producing ferrites comprising the steps of:
- preparing a mixture of iron oxide powder, ferromanganese powder and at least one component selected from the group consisting of zinc oxide powder, magnesium oxide powder and nickel oxide powder;
- pelletizing the resultant mixture;
- and
- calcining the resultant pellet at a temperature of 900.degree. C. or higher to oxidize the pellet.
1 more element
Dependencies are inferred from the claim text.