Magnetic oxide and process for producing same

Details Magnetic oxide and process for producing same Magnetic oxide and process for producing same

H - Electricity

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F

H01F 1/36 (2006.01) G03G 9/083 (2006.01) G03G 9/107 (2006.01) G11B 5/706 (2006.01) H01F 1/11 (2006.01)

Patent

CA 2141857

A magnetic oxide obtained by mixing a given amount ranging from 0.20 to 76.0% by weight of at least one member selected from among Ca, Ti, Sn, Si and Mg magnetization control (regulation) materials with hematite, a mixture of hematite and magnetite, or magnetite as a starting material to obtain a mixed powder, adding 0.1 to 4.0% by weight of a liquid or powder substance having a carbon-to-carbon single or double bond to the mixed powder, stirring the mixture to obtain a substantially homogeneous mixture and sintering the obtained mixture in an inert gas at 550 to 1500°C, and a process for producing the same.

Des particules mélangées sont produites par mélange d'hématite, de magnétite, ou d'un mélange de celles-ci avec l'un des matériaux régulant la magnétisation, par exemple Ca, Ti, Sn, Si et Mg, dans une plage donnée de 0,20 à 76,0 % en poids. Aux particules mélangées est ajouté et mélangé uniformément 0,1 à 4,0 % en poids de fluide ou de substance granulaire possédant une liaison simple ou une liaison double d'atomes de carbone. Le mélange est ensuite calciné dans un gaz inerte à une température de 550 à 1 000 DEG C.

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