A kind of preparation method of electromagnetic wave shielding composite material

A composite material and electromagnetic wave technology, which is applied in the field of preparation of electromagnetic wave shielding composite materials, can solve problems such as unfavorable filling of composite shielding materials by metal fibers, and achieve the effects of strong operability, high electrical conductivity and simple preparation process.

Active Publication Date: 2014-10-22
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, too long or too short metal fibers are not conducive to the preparation of filled composite shielding materials with high electromagnetic shielding effectiveness

Method used

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  • A kind of preparation method of electromagnetic wave shielding composite material
  • A kind of preparation method of electromagnetic wave shielding composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 and figure 2 As shown, the preparation method of the electromagnetic wave shielding composite material of this embodiment includes the following steps:

[0030] Step 1. Etching 9 transverse grooves and 9 longitudinal grooves equidistantly on the surface of the ceramic plate 1 by using a dry etching process, the 9 transverse grooves and 9 longitudinal grooves are interlaced to form a network groove 2 , the groove depth of the mesh groove 2 is 90 μm;

[0031] Step 2: Use a stretcher to stretch the metal fiber 3 with a diameter of 8 μm to the designed length, and then place the stretched metal fiber 3 in the mesh groove 2, each transverse groove and each longitudinal groove 10 metal fibers 3 are placed inside; the metal fibers 3 are stainless steel fibers;

[0032] Step 3. Put the ceramic plate 1 with the metal fiber 3 placed in the step 2 into a vacuum sintering furnace, and the vacuum degree is 1×10 -3 Pa, the temperature is sintering under the cond...

Embodiment 2

[0037] Such as figure 1 and figure 2 As shown, the preparation method of the electromagnetic wave shielding composite material of this embodiment includes the following steps:

[0038] Step 1. Etching 5 transverse grooves and 5 longitudinal grooves equidistantly on the surface of the ceramic plate 1 by using a dry etching process, the 5 transverse grooves and 5 longitudinal grooves are interlaced to form a network groove 2 , the groove depth of the mesh groove 2 is 200 μm;

[0039]Step 2: Use a stretcher to stretch the metal fiber 3 with a diameter of 100 μm to the designed length, and then place the stretched metal fiber 3 in the mesh groove 2, each transverse groove and each longitudinal groove Two metal fibers 3 are placed inside; the metal fibers 3 are stainless steel fibers;

[0040] Step 3. Put the ceramic plate 1 with the metal fiber 3 placed in the step 2 into a vacuum sintering furnace, and the vacuum degree is 1×10 -2 Pa, the temperature is sintering under the c...

Embodiment 3

[0045] Such as figure 1 with figure 2 As shown, the preparation method of the electromagnetic wave shielding composite material of this embodiment includes the following steps:

[0046] Step 1. Etch 12 transverse grooves and 12 longitudinal grooves equidistantly on the surface of the ceramic plate 1 by using a wet etching process, and the 12 transverse grooves and 12 longitudinal grooves are interlaced to form a mesh groove 2 , the groove depth of the mesh groove 2 is 10 μm;

[0047] Step 2: Use a stretcher to stretch the metal fiber 3 with a diameter of 8 μm to the designed length, and then place the stretched metal fiber 3 in the mesh groove 2, each transverse groove and each longitudinal groove One metal fiber 3 is placed inside; the metal fiber 3 is aluminum fiber;

[0048] Step 3. Put the ceramic plate 1 with the metal fiber 3 placed in the step 2 into a vacuum sintering furnace, and the vacuum degree is 1×10 -3 Pa, the temperature is sintered under the condition of ...

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Abstract

The invention provides a preparation method of electromagnetic wave shielding composites. The method comprises the following steps of: firstly, etching a net-shaped groove in the surface of a ceramic plate; secondly, putting metal fibers into the net-shaped groove; thirdly, vacuum-sintering the metal fibers in the net-shaped groove to obtain a metal fiber net; fourthly, preparing an epoxy resin and a curing agent into a polymer solution; and fifthly, injecting the polymer solution into a mold, standing until the polymer solution is cured into a viscous gel, inserting the metal fiber net into the viscous gel, and then continuously standing until the polymer solution is cured completely so as to obtain the electromagnetic wave shielding composites. The preparation method of electromagnetic wave shielding composites is simple in preparation process, novel and reasonable in design, low in input cost, and strong in operability; and the prepared electromagnetic wave shielding composites are composed of the metal fiber net and a polymer, wherein the metal fiber net is preferably combined with the polymer, and sintering nodes are formed in the metal fiber net so that the electromagnetic wave shielding composites have excellent electromagnetic shielding properties.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave shielding materials, and in particular relates to a preparation method of electromagnetic wave shielding composite materials. Background technique [0002] Electromagnetic pollution has become the fourth largest environmental pollution after air pollution, water pollution and noise pollution, and has been identified by the United Nations as one of the pollution that must be controlled. At present, there are three main measures to control electromagnetic pollution: eliminating radiation sources, controlling transmission routes and protecting receptors. There are certain difficulties in the implementation of the first two measures, but the protection of recipients is the most important and most effective measure. Electromagnetic wave shielding material is one of the most effective measures to protect the receiver, so it has received extensive attention. [0003] At present, electromag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C39/02B29C39/10B29C39/22B29B11/00
Inventor 王建忠汤慧萍朱纪磊敖庆波支浩马军
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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