Method for preparing coatings with high broadband absorptivity at terahertz waveband

A technology of terahertz and absorption rate, which is applied in coatings, devices for coating liquid on the surface, special surfaces, etc., can solve the problems of long thermal equilibrium time, fragility, harsh growth conditions, etc., and achieve short thermal equilibrium time and high absorption rate High, simple processing and preparation effect

Active Publication Date: 2013-07-10
NAT INST OF METROLOGY CHINA
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Problems solved by technology

However, they only give the measurement results at 0.76THz frequency, THz radiation metrology at other frequencies is still unresolved
In addition, the complex preparation process of carbon nanotubes, harsh growth conditions, long thermal equilibrium time and fragility have limited the application of this material.

Method used

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  • Method for preparing coatings with high broadband absorptivity at terahertz waveband
  • Method for preparing coatings with high broadband absorptivity at terahertz waveband

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Embodiment Construction

[0020] see figure 1 As shown, the present invention provides a method for preparing a coating with broadband high absorption rate in the terahertz band, comprising the steps of:

[0021] Step 1: Take silicon carbide particles and black paint, wherein the proportion of silicon carbide particles is 5%-30%, and the proportion of black paint is 70%-95%. The diameter of the silicon carbide particles is 1 μm to 1000 μm, and the silicon carbide particles include colorless silicon carbide particles, black silicon carbide particles or green silicon carbide particles, or a combination thereof; the black paint coating includes 3M black Lacquer paint, carbon nano powder black paint, EPC-2200 black paint, Chemglaze black paint or Martin Black black paint, or combinations thereof;

[0022] Step 2: Mix the silicon carbide particles and the black paint, and stir evenly; wherein a curing agent or a thermal conductivity auxiliary material is added to the mixed silicon carbide particles and the...

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Abstract

Disclosed is a method for preparing coatings with high broadband absorptivity at terahertz waveband. The method comprises the steps of step one, taking silicon carbide particles and black paint; step two, mixing the silicon carbide particles with the black paint; step three, spraying the mixed silicon carbide particles and the black paint on the surface of a substrate material; and step four, drying the substrate material with the mixed silicon carbide particles and the black paint sprayed to complete preparation. The coating material is simple to prepare, high in absorptivity and broad in absorption band, complete absorption of electromagnetic radiation broadband with the frequency higher than 0.05 THz (corresponding wavelength shorter than 6mm) is achieved through mixing of the silicon carbide particles with the black paint, and the coating can be used for absolute measurement of terahertz waveband radiation intensity and invisibility of targets in the terahertz waveband.

Description

technical field [0001] The invention relates to the technical field of new materials and instruments and meters, and is a material with a high absorption rate in the far-infrared and terahertz bands and a target surface material for a terahertz radiometer detector, especially a material with a broadband ( A method for preparing a coating with a high absorptivity (the absorptivity can be as high as 99.9%) covers a frequency band above 0.05 THz and corresponds to a wavelength of less than 6 mm. Background technique [0002] Terahertz refers to electromagnetic radiation with a frequency of 0.1-10THz, which is located in the band gap between optical infrared and electromagnetic millimeter waves on the electromagnetic spectrum. For a long time, due to the lack of effective generation and measurement technology, terahertz has become the last window in the electromagnetic spectrum that humans have yet to understand. With the development of optical and electronic technologies, vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/06
Inventor 邓玉强孙青于靖
Owner NAT INST OF METROLOGY CHINA
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