Preparation method of silver coated copper powder for electronic slurry
A technology of silver-coated copper powder and electronic paste, applied in the direction of coating, etc., can solve the problems of complex process steps, complex raw material components, easy deposition of silver layer, etc., and achieve simple process steps, high oxidation resistance, and raw material composition simple effect
Inactive Publication Date: 2012-01-25
NINGBO GUANGBO NEW NANOMATERIALS STOCK
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The invention provides a preparation method of silver coated copper powder for electronic slurry, which comprises the following operation steps of: (1) adding a certain mass of copper powder raw materials into a reaction container, adding acid solution, carrying out ultrasonic stirring for 5 to 15 min, filtering materials, and collecting filter residue; (2) weighing a proper amount of complexing agents, adding the complexing agents into deionized water, then, adding copper powder after acid washing, carrying out stirring dispersion, and obtaining reducing liquid; (3) weighing a proper amount of silver nitrate, adding the silver nitrate into the deionized water, adding ammonia water, stirring the solution until the solution is transparent, and obtaining silver-ammonia solution; (4) adding the silver-ammonia solution into the reducing liquid for taking reaction under the dispersion stirring of an ultrasonic dispersing device; and (5) filtering the solution after the reaction, washing the filter residue by the deionized water and/or absolute ethyl alcohol, carrying out vacuum drying, and obtaining the product of the silver coated copper powder for the electronic slurry. The preparation method has the advantages that the raw material ingredients are simple, the technical steps are simple, the preparation method can be used for large-scale production, and in addition, a silver layer can not be deposited on the surface of the reaction container.
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