Epoxy resin composite wave-absorbing material and preparation method thereof

A composite absorbing material and epoxy resin technology, applied in the field of electromagnetic absorbing materials, can solve the problems of narrow absorbing frequency band, low absorbing efficiency, etc. Effect
CN102504495BInactive Publication Date: 2013-04-10BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2013-04-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an epoxy resin composite wave-absorbing material and a preparation method thereof, belonging to the field of electromagnetic wave-absorbing materials. The wave-absorbing material comprises 100 parts by weight of epoxy resin, 50-100 parts by weight of a curing agent, 3-10 parts by weight of a magnetic filling material, 2-6 parts by weight of a semiconductor filling materialand 2-5 parts by weight of a conductive filling material. The preparation method comprises the following steps of: after adding the magnetic filling material, the semiconductor filling material and the conductive filling material into the heated and thinned epoxy resin, uniformly mixing, and curing by adding the curing agent. According to the invention, the semiconductor filling material is composited with the magnetic filling material and the conductive filling material to form the electromagnetic wave-absorbing material to be used, so that the wave-absorbing efficiency of the electromagnetic wave-absorbing material is increased, furthermore, the wave-absorbing frequency band can be effectively broadened.
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Description

technical field

[0001] The invention relates to an epoxy resin composite wave-absorbing material and a preparation method thereof, belonging to the field of electromagnetic wave-absorbing materials. Background technique

[0002] In the era of rapid development of electronics, electrical appliances, communications and information industries, electromagnetic wave interference has become a special environmental pollution. Absorbing materials can reduce or weaken electromagnetic interference, so the research and application of absorbing materials are becoming more and more important. According to the transmission line theory, by improving the conductivity and magnetic permeability of the absorbing material, the impedance of the absorbing material matches the impedance of the free space, and the electromagnetic wave can be greatly incident on the absorbing material and absorbed by attenuation. The absorbing material converts the incident electromagnetic wave into heat energy or ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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