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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 2. Отображено 2.
02-06-2023 дата публикации

Cleaning method of nano-silver

Номер: CN116197394A
Автор: MA JIN, LIU FEIQUAN
Принадлежит:

The invention relates to a nano-silver cleaning method. The nano-silver cleaning method comprises the following steps: cleaning a nano-silver solution; hydroxyethyl cellulose is added into the cleaned nano-silver solution; the method comprises the following steps: performing ultrasonic dispersion on a nano-silver solution containing hydroxyethyl cellulose, and gradually adding a water-soluble organic solvent into the nano-silver solution during ultrasonic dispersion until nano-silver is separated out; and removing supernate to obtain the nano-silver particles. The cleaned nano-silver particles can be placed in a freeze dryer to be dried and then serve as a solid phase to be stored for standby application. According to the method for cleaning the nano-silver, the difficulty that the PVP and the nano-silver are difficult to purify and separate is overcome. And long-time ceramic membrane cleaning treatment is not needed, so that the energy consumption in the cleaning process is reduced, and ...

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Номер записи: 1
04-04-2023 дата публикации

Silver-plated copper powder and preparation method thereof

Номер: CN115889767A
Автор: SUN YA, LIU FEIQUAN, FAN XIAO
Принадлежит:

The invention discloses silver-plated copper powder and a preparation method thereof.The preparation method comprises the steps that firstly, a dispersing agent and a reducing agent are added into a copper ion solution for reduction preparation of copper powder, the dispersing agent is used for controlling the morphology of the prepared copper powder, the purpose of adjusting the pH is to control the reduction rate, and then the morphology and the particle size of the prepared copper powder are controlled; the purpose of adding the reducing agent is to reduce copper ions to obtain copper powder. The prepared copper powder is directly cleaned and dispersed, the copper powder is prevented from being oxidized, and the surface treatment process of the copper powder can be omitted. A complexing agent and a silver-ammonia solution are added into a copper dispersion liquid, an alcoholic solution is directly used as a reducing agent, the silver-ammonia solution can be reduced through a hydrothermal ...

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Номер записи: 2