A kind of preparation method of carbon-based wave-absorbing material prepared by aluminosilicate polymer

A technology of aluminosilicate and wave-absorbing materials, which is applied in the field of wave-absorbing materials, can solve the problems of complex preparation process, high cost, and high density, and achieve the effects of simple preparation and molding process, reduced subsequent processing, and wide sources

Active Publication Date: 2018-07-06
智合(深圳)新材科技有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to use aluminosilicate polymers to prepare carbon-based wave-absorbing materials, and solve the problems of existing powder-type wave-absorbing materials with high density, low absorption rate per unit thickness, high cost, difficult molding, and complicated preparation process

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  • A kind of preparation method of carbon-based wave-absorbing material prepared by aluminosilicate polymer

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Embodiment Construction

[0021] The present invention will be further described below through the drawings and specific embodiments, but it does not mean to limit the protection scope of the present invention.

[0022] Using metakaolin, carbon materials and alkali excitation solution to synthesize aluminosilicate polymer, and then curing at low temperature to obtain wave-absorbing material, the specific steps are as follows:

[0023] a) Activation of kaolin: put kaolin in an alumina crucible, calcined in a muffle furnace, set the calcining temperature to 800°C, the heating rate to 5°C / min, and the calcining time to 2h to achieve dehydroxylation of the kaolin, and into metakaolin.

[0024] b) Preparation of mixed powder: at room temperature, the metakaolin obtained in step a) was mixed with a carbon material by ball milling for 24 hours, wherein the molar ratio of metakaolin to graphite was 1:12 to obtain a mixed powder.

[0025] c) Preparation of alkali excitation solution: mix potassium hydroxide wi...

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Abstract

The invention discloses a carbon-based wave absorbing material prepared from aluminosilicate polymer and a preparation method of the carbon-based wave absorbing material. The carbon-based wave absorbing material is formed by using metakaolin, a carbon material and an alkali activating solution to synthesize the aluminosilicate polymer and curing, wherein a mole ratio of metakaolin and the carbon material is 1:(3-24), and a mole ratio of silicon and aluminum in the aluminosilicate polymer is (1-2):1. The preparation method includes: activating kaolin; preparing mixed powder; preparing the alkali activating solution; preparing the aluminosilicate polymer; curing for forming. The preparation method is simple in process, capable of realizing direct forming of complex or large parts at low temperature and wide in application range. The carbon-based wave absorbing material is low in cost and high in unit thickness absorptivity and meets requirements on thinness, lightness, width and strength.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, in particular to a carbon-based wave-absorbing material prepared from an aluminosilicate polymer and a preparation method thereof. Background technique [0002] With the rapid development of electronic technology, the electromagnetic radiation in people's lives is increasing. At the same time, in order to meet the needs of modern warfare, microwave-absorbing materials will be widely used in weapons. The research on materials with microwave-absorbing capabilities is very important for military and civilian purposes great practical value. According to the different absorption mechanisms of electromagnetic waves, wave-absorbing materials can be mainly divided into two categories: electric loss type and magnetic loss type. The former, such as nano-conductive graphite powder, conductive polymer, silicon carbide fiber, carbon nanotube, etc., is mainly characterized by a high tangent a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 何培刚苑景坤贾德昌付帅杨治华段小明王胜金周玉
Owner 智合(深圳)新材科技有限公司
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