Method of manufacturing ultrafine molybdenum powder or ultrafine tungsten powder surface clad metal copper

A technology of ultra-fine tungsten powder and ultra-fine molybdenum powder, which can be used in coating and other directions, can solve the problems of negative impact of electric vacuum performance, difficult to achieve, non-magnetic and other problems, and achieve the effect of uniform organization, simple preparation process and dense structure.
CN101428345AActive Publication Date: 2009-05-13GRIMAT ENG INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GRIMAT ENG INST CO LTD
Publication Date
2009-05-13

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Abstract

The invention relates to a preparation method for a metal copper covered on the surface of ultrafine molybdenum powder or ultrafine tungsten powder, which belongs to the field of new materials. The preparation method is characterized in that the method mainly adopts the ultrafine molybdenum powder or the ultrafine tungsten powder with the average particle diameter D50 not more than 1.3 Mum, which is mixed with Cu<2+> soluble salt solution under the continual stirring, polymeric surfactant of coordination group with N atom and O atom is added, one of hydrazine hydrate, sodium hydrosulfite or sodium hypophosphite is added as reducing agent, and an appropriate amount of alkali is dropwise added to adjust pH value in the period so that pH value of the reaction system is from 5.5 to 12.0; in addition, in the range of 20 to 95 DEG C, the reaction continues for 0.5 to 3 hours; the ultrafine molybdenum powder or the ultrafine tungsten powder is filtered through flushing by diluted NH4Cl or NH4NO3 solution, the powder is pulped by alcoholic solution with 0.2-3.0 percent of fatty acid, and the ultrafine molybdenum powder or the ultrafine tungsten powder is filtered again, the powder is heated and dried by H2, to prepare the ultrafine molybdenum powder or the ultrafine tungsten powder of the metal copper covered with the even surface. Through adjusting the proportion of soluble salt of the ultrafine molybdenum powder or the ultrafine tungsten powder and the copper, the ultrafine molybdenum powder or the ultrafine tungsten powder covered by metal copper with different composition proportions can be prepared to meet different demands.
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Description

Technical field

[0001] The invention relates to a preparation method for coating metal copper on the surface of ultrafine molybdenum powder or ultrafine tungsten powder, in particular to a preparation method for coating metal copper with nanometer thickness on the surface of ultrafine molybdenum powder or ultrafine tungsten powder, and belongs to a novel Material technology field. Background technique

[0002] Molybdenum copper material, like tungsten copper material, is a pseudoalloy composed of two immiscible metal phases in structure. Therefore, this material has the characteristics of both constituent metals and has good overall performance.

[0003] 1. High electrical and thermal conductivity

[0004] Molybdenum and tungsten are elements with good electrical and thermal conductivity in addition to high-conductivity metals such as gold, silver and copper. Therefore, tungsten-copper and molybdenum-copper materials that are further added with highly conductive and thermally con...

Claims

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