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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 3. Отображено 3.
06-04-2011 дата публикации

Electromagnetic shielding waterborne paint and preparation method thereof

Номер: CN0102002294A
Автор: Mao Qianjin, Li Taoan, Cui Suping, Nie Zuoren, Wang Ziming, Lan Mingzhang, Wang Yali, Shen Wenting
Принадлежит:

The invention discloses an electromagnetic shielding waterborne paint and a preparation method thereof, which belong to the field of electromagnetic shielding paints. The paint consists of the following components in percentage by weight: 30 to 50 percent of emulsion, 10 to 30 percent of flaky metal powder, 0.5 to 2 percent of dispersant, 0.2 to 1 percent of wetting agent, 0.5 to 3 percent of leveling agent, 0.5 to 1.5 percent of antifoaming agent and 25 to 40 percent of water. The preparation method comprises the following steps of: stirring and dissolving the dispersant, the wetting agent and a part of antifoaming agent in deionized water; mixing the flaky metal powder in solution and stirring at a high speed; adding the emulsion into the mixture, stirring and mixing; and adding the leveling agent and the remaining antifoaming agent into the mixture and stirring. The paint of the invention can achieve the shielding efficiency of between 60 and 85 dB in the frequency range of between 100 ...

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Номер записи: 1
15-06-2011 дата публикации

Gas washing and recovering device for preparing macromonomers of poly carboxylic acid water reducing agent

Номер: CN0102091508A
Автор: ZIMING WANG, FUYING ZHENG, YING XU, HUIQUN LI, HAO WU, TAOAN LI, XIAO LIU, SUPING CUI, MINGZHANG LAN, YALI WANG, QIANJIN MAO, WANG ZIMING, ZHENG FUYING, XU YING, LI HUIQUN, WU HAO, LI TAOAN, LIU XIAO, CUI SUPING, LAN MINGZHANG, WANG YALI, MAO QIANJIN
Принадлежит:

The invention discloses a gas washing and recovering device for preparing macromonomers of a poly carboxylic acid water reducing agent and relates to the field of a gas washing device for synthetic resin. The device comprises a mixed gas inlet pipe, a coil pipe (which is formed by winding a pipeline into a circle), a water inlet pipe, an emptying pipe, a charging hopper, a grating and a ceramic ball or a glass ball. The mixed gas inlet pipe enters from the top of the recovering device and is connected with the coil pipe at the bottom of the recovering device. The coil pipe is provided with small holes with different sizes at equal distances. The diameters of the small holes are gradually increased from a gas inlet end to a far end. The small holes are positioned at the lower part of the coil pipe. The grating positioned above the coil pipe is provided with the ceramic ball or the glass ball. Gas is uniformly exhausted from the coil pipe. After the gas is in sufficient contact with a solvent ...

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Номер записи: 2
08-06-2011 дата публикации

Ferrite gypsum-based microwave-absorbing composite material and preparation method thereof

Номер: CN0102086114A
Автор: SUPING CUI, WENTING SHEN, ZUOREN NIE, QIANJIN MAO, MINGZHANG LAN, ZIMING WANG, YALI WANG, TAOAN LI, CUI SUPING, SHEN WENTING, NIE ZUOREN, MAO QIANJIN, LAN MINGZHANG, WANG ZIMING, WANG YALI, LI TAOAN
Принадлежит:

The invention discloses a ferrite gypsum-based microwave-absorbing composite material and a preparation method thereof, belonging to the field of building materials. The microwave-absorbing composite material comprises dry materials and water, wherein the dry materials comprise 80-90 percent by weight of gypsum and 10-20 percent by weight of ferrite, and the weight ratio of the water to the dry materials, i.e. the water-cement ratio, is 0.5-0.6 to 1. The preparation method comprises the following steps of: drily and uniformly stirring the dry materials, adding water to mix uniformly, pouring into a steel die, vibrating and forming; and then, conserving and drying. The material provided by the invention has favorable microwave-absorbing performance, mechanical performance and simple and practical production process.

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Номер записи: 3