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Electromagnetic wave absorbing material, preparation method, application, coating and block material

A technology for absorbing materials and electromagnetic waves, which is applied to electromagnetic wave absorbing materials, coatings and blocks, preparation methods, and application fields, and can solve problems such as multiple reflections of electromagnetic waves

Active Publication Date: 2020-07-31
NANJING STAR HIDDEN TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide an improved electromagnetic wave absorbing material for the p...

Method used

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  • Electromagnetic wave absorbing material, preparation method, application, coating and block material
  • Electromagnetic wave absorbing material, preparation method, application, coating and block material
  • Electromagnetic wave absorbing material, preparation method, application, coating and block material

Examples

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preparation example Construction

[0081] The present application also provides a preparation method of an electromagnetic wave absorbing material, comprising the following steps:

[0082] S1. Provide a wave-absorbing film array. The wave-absorbing film array is formed by arranging a plurality of wave-absorbing films along a predetermined axis. There is a predetermined interval between two adjacent wave-absorbing films, and the predetermined interval is smaller than the wavelength of the incident electromagnetic wave; The preset interval here is the same as the definition of the preset interval mentioned above, and will not be repeated here;

[0083] S2. Obtain the first inclination angles of the electromagnetic waves incident on each absorbing film relative to the preset axis, namely figure 1 The inclination angles β1, β2, etc. shown;

[0084] S3. Set each second inclination angle of each absorbing film relative to the preset axis according to the first inclination angles to absorb electromagnetic waves;

[00...

Embodiment 1

[0091] Refer to the following Figure 2 to Figure 4 The electromagnetic wave absorbing material 100 of Example 1 of the present application will be described. figure 2 A schematic structural view of the electromagnetic wave absorbing material 100 of Example 1 is shown.

[0092] Such as figure 2 As shown, the electromagnetic wave absorbing material 100 includes a base 20 and a wave-absorbing film array 10 disposed inside the base 20 . The electromagnetic wave incident medium is air (relative permittivity is 1), and the material of the substrate 20 is also air. The dotted line indicates the normal line of the incident surface of the substrate 20. The absorbing films in the absorbing film array 10 all have a thickness of 100 μm and a square resistance of 100 μm. For an ITO film (tin-doped indium oxide film) with a value of 185Ω, the thickness of the absorbing film array 10 (that is, the thickness in the direction perpendicular to the preset axis AX) is 30mm, and the preset in...

Embodiment 2

[0096] Refer to the following Figure 5 to Figure 6 The electromagnetic wave absorbing material 100 of Example 2 of the present application will be described. In this embodiment, for the sake of brevity, descriptions that are the same as or similar to those in Embodiment 1 will be omitted. Figure 5 A schematic structural view of the electromagnetic wave absorbing material 100 of Example 2 is shown.

[0097] Such as figure 2 As shown, the electromagnetic wave absorbing material 100 includes a base body 20 and a wave-absorbing film array 10 inside the base body 20 . The electromagnetic wave emitting surface of the base body 20 is contacted with a metal plate substrate 30 , and the metal plate substrate 30 can be used to reflect electromagnetic waves. Since the configurations of the base body 20 and the absorbing film array 10 are the same as those in Embodiment 1, details will not be repeated here.

[0098] When the electromagnetic wave is a parallel incident transverse mag...

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Abstract

The invention provides an electromagnetic wave absorbing material, a preparation method, application, a coating and a block material. The electromagnetic wave absorbing material comprises a wave absorbing thin film array, the wave absorbing thin film array is formed by arranging a plurality of wave absorbing thin films along a preset axis, a preset interval is formed between every two adjacent wave absorbing thin films, and the preset interval is smaller than the wavelength of incident electromagnetic waves; and each wave-absorbing film in the wave-absorbing film array is obliquely arranged relative to the preset axis within a preset angle range so as to absorb electromagnetic waves. The electromagnetic wave absorbing material can absorb electromagnetic waves more fully while weakening oreliminating reflection of the electromagnetic waves, and meets corresponding engineering application requirements.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave absorption, in particular to an electromagnetic wave absorption material, a preparation method, an application, a coating and a block material. Background technique [0002] The research on electromagnetic wave absorption has always been a hot spot in the field of electromagnetic waves. The perfect absorber of electromagnetic waves is very important in both engineering applications and national defense and military. [0003] However, the impedance of traditional electromagnetic wave absorbing materials cannot directly match the impedance of air, so while absorbing electromagnetic waves, they also reflect more electromagnetic waves, which cannot better meet the corresponding engineering application requirements. Contents of the invention [0004] Based on this, it is necessary to provide an improved electromagnetic wave absorbing material for the problem that traditional electromagne...

Claims

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Application Information

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IPC IPC(8): H01Q17/00H05K9/00
CPCH01Q17/00H05K9/0081
Inventor 罗杰褚宏晨赖耘
Owner NANJING STAR HIDDEN TECH DEV CO LTD
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