| 摘要 |
There is disclosed a novel dry process for the production of hexagonal-system ferrite having the formula: MOxnFe2O3, wherein n represents a real number of 5.1-5.8 and M represents at least one metallic element selected from the group consisting of Ba, Sr and Pb. The ferrite is baked in the presence of the mixed additive comprising X-agent selected from the group consisting of KCl, NaCl and LiCl; and Y-agent selected from the group consisting of KBO2, NaBO2 and LiBO2 and/or the group consisting of K2CO3, Na2CO3 and Li2CO3. After baking, the mixed additive is completely removed from the resulting ferrite by washing or by a wet-process disintegrating treatment. By changing the mixing ratio of said X-agent to said Y-agent, ferrite crystals having various characteristic properties can be obtained.
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