Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1979-05-08
1981-04-28
Rutledge, L. Dewayne
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
148 3157, 148101, 148103, 252 6254, C04B 3504
Patent
active
042643619
ABSTRACT:
This invention relates to a heat-resistant composite magnet comprising 2 to 30% by weight of an organic-inorganic compound binder containing boron and silicon and 70 to 98% by weight of the powder of one or more permanent magnets.
This invention further relates to a method for producing a heat-resistant composite magnet, which comprises the steps of (a) adding the powder of one or more permanent magnets to a solution of an organic-inorganic compound binder containing boron and silicon dissolved in an organic solvent; (b) evaporating said solvent; (c) molding the resultant permanent magnet powder covered with said binder under a pressure of 0.1 to 5 tons/cm.sup.2 in the presence or in the absence of a magnetic field of 12,000-5,000 oersted, the molded product being heated at 200.degree.-450.degree. C. during the molding or after the molding; and (d) cooling the molded product.
This invention still further relates to a method for producing a heat-resistant composite magnet, which comprises the steps of (a) molding the powder of one or more permanent magnet at room temperature under a pressure of 0.1 to 5 tons/cm.sup.2 in the presence or in the absence of a magnetic field of 12,000-5,000 oersteds; (b) dipping the molded product in a solution of an organic-inorganic compound binder containing boron and silicon; (c) drying the dipped product; (d) heating the dried product at 200.degree.-450.degree. C.; and (e) cooling the heated product.
REFERENCES:
patent: 2601212 (1952-06-01), Polydoroff
patent: 2744040 (1966-05-01), Altmann
patent: 4146671 (1979-03-01), Fujiyama et al.
Chemistry and Technology of Silicones, Walter Noll 1968, Academic Press I, pp. 332-338.
Hamano Masaaki
Hasegawa Yoshio
Kamino Kimiyuki
Yajima Seishi
Yamane Takehiro
Mitsubishi Seiko Kabushiki Kaisha
Rutledge L. Dewayne
Sheehan John P.
The Foundation: The Research Institute for Special Inorganic Mat
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