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METHOD FOR PRODUCTION OF COPPER ULTRAFINE POWDER AND METHOD FOR PRODUCTION OF CONDUCTIVE COMPOSITIONS BASED ON COPPER ULTRAFINE POWDER
METHOD FOR PRODUCTION OF COPPER ULTRAFINE POWDER AND METHOD FOR PRODUCTION OF CONDUCTIVE COMPOSITIONS BASED ON COPPER ULTRAFINE POWDER
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机译:铜超细粉的生产方法和导电组合物的生产方法
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FIELD: powdery metallurgy of nonferrous metals. SUBSTANCE: method includes mixing of pentahydrate of copper sulfate with water-glycerin mixture in which water amounts to 2.5-5.0% of mixture volume; heating holding up to complete dissolving of components; subsequent elevation temperature and reduction to ultrafine copper with addition of catalytic quantities of organic acid; separation of copper ultrafine powder; washing with alcohol or aqueous solution of hydroquinone; treatment with alcohol or pentane solution of stearic acid; drying and storage. The method for production of conductive compositions based on copper ultrafine powder is realized by mixing of copper ultrafine powder with soluble phenol-formaldehyde resin or organic binder and with I-naphthol, ascorbic or formic acid or with mixture of glycerin with I-naphthol as stabilizer with the following amount of components, wt.%: ultrafine copper:resin:stabilizer = 100:25:(1-5). EFFECT: higher resistance to oxidation of copper ultrafine powder, simplified method of production, and also reduced specific resistance of compositions based on copper ultrafine powder with soluble phenol-formaldehyde resin and promoted further stabilization of compositions in time. 11 cl, 3 tbl
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