Preparation method of high-dispersion micron-sized silver powder for electrical contact

The invention belongs to the field of preparation of silver powder for electrical alloy, and particularly relates to a preparation method of high-dispersion micron-sized silver powder for an electrical contact, which comprises the following steps: (1) dissolving silver nitrate crystals in water to p...

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Bibliographic Details
Main Authors LIN YINGTAO, DAI LINTAO, XIA ZONGBIN, ZHOU KEWU, WANG DAWU
Format Patent
LanguageChinese
English
Published 22.07.2022
Subjects
BASIC ELECTRIC ELEMENTS
CASTING
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
PERFORMING OPERATIONS
POWDER METALLURGY
RELAYS
SELECTORS
TRANSPORTING
WORKING METALLIC POWDER
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Summary:The invention belongs to the field of preparation of silver powder for electrical alloy, and particularly relates to a preparation method of high-dispersion micron-sized silver powder for an electrical contact, which comprises the following steps: (1) dissolving silver nitrate crystals in water to prepare a silver nitrate solution; (2) adding ammonia water into the silver nitrate solution to prepare a silver-ammonia solution A; (3) dissolving a reducing agent and a dispersing agent in water to prepare a solution B; (4) deionized water is added into a reaction container, the silver-ammonia solution A and the solution B are simultaneously added into the reaction container at a certain flow rate under the stirring state, and silver powder is prepared through reaction; (5) cleaning the silver powder prepared in the step (4), and then performing ultraviolet irradiation for a certain time while stirring; and (6) washing the silver powder, filtering and drying to obtain a finished product. The method provided by the
Bibliography:Application Number: CN202210254041