Radiation-proof thermal control coating and manufacturing method thereof

A thermal control coating and radiation protection technology, which is applied to radiation-absorbing coatings, coatings, and radiation protection devices for aerospace vehicles.

Inactive Publication Date: 2017-05-17
BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the Zn atoms in ZnO can effectively hinder electrons and protons, due to their large atomic number, a large amount of bremsstrahlung is unavoidable.

Method used

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  • Radiation-proof thermal control coating and manufacturing method thereof
  • Radiation-proof thermal control coating and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 ZrO2 bottom layer, ZnO middle layer, BN surface coating

[0028] After mixing the zirconia particles and the silicone resin binder according to the weight ratio of 1:2, spray on the Al 2 o 3 On the substrate, spray the thickness of 0.1mm, and cure for 12 hours; then mix zinc oxide particles and silicone resin adhesive according to the weight ratio of 1:2, spray on the substrate, spray the thickness of 0.1mm, and cure for 16 hours; finally nitrogen After the boron oxide particles and the silicone resin adhesive are uniform according to the weight ratio of 1:2, they are sprayed on the substrate with a spray thickness of 0.1mm, and after curing for 24 hours, the coating is completed.

[0029] After measurement, the measured solar absorption ratio αs is about 0.152, and the thermal emissivity ε is about 0.886, which is equivalent to ZnO white paint and S781 white paint. Using Casino electron incident simulation software to calculate, under the same surface d...

Embodiment 2

[0030] Example 2 BaO bottom layer, ZnO middle layer, BN surface coating

[0031] After mixing the barium oxide particles and the silicone resin binder according to the weight ratio of 1:4, spray on the SiO 2 On the substrate, spray the thickness of 0.3mm, and cure for 16 hours; then mix zinc oxide particles and silicone resin adhesive according to the weight ratio of 1:4, spray on the substrate, spray the thickness of 0.3mm, and cure for 20 hours; finally nitrogen After the boron oxide particles and the silicone resin adhesive are uniform according to the weight ratio of 1:4, they are sprayed on the substrate with a spray thickness of 0.05mm, and after curing for 24 hours, the coating is completed.

[0032] After measurement, the measured solar absorption ratio αs is about 0.150, and the thermal emissivity ε is about 0.891, which is equivalent to ZnO white paint and S781 white paint. Using Casino electron incident simulation software to calculate, under the same surface den...

Embodiment 3

[0033] Example 3 Bi 2 O 3 Bottom layer, TiO 2 Intermediate layer, BN surface coating

[0034] After mixing the bismuth oxide particles and the silicone resin binder according to the weight ratio of 2:1, spray on the SiO 2 On the substrate, spray coating with a thickness of 0.5mm, and cure for 16 hours; then mix titanium oxide particles and silicone resin binder uniformly according to the weight ratio of 1:2, spray on the substrate, spray with a thickness of 0.5mm, and cure for 20 hours; finally nitrogen After the boron oxide particles and the silicone resin adhesive are uniform according to the weight ratio of 1:2, they are sprayed on the substrate with a spray thickness of 0.3mm, and after curing for 24 hours, the coating is completed.

[0035] After measurement, the measured solar absorption ratio αs is about 0.155, and the thermal emissivity ε is about 0.881, which is equivalent to ZnO white paint and S781 white paint. Using Casino electron incident simulation so...

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Abstract

The invention discloses a radiation-proof thermal control coating. A low-atomic-number material is utilized as a surface coating of the thermal control coating, a medium-atomic-number material is utilized as an intermediate coating of the thermal control coating, and a high-atomic-number material is utilized as a bottom coating of the thermal control coating. Compared with a ZnO coating, the coating disclosed by the invention has the advantages that the radiation protection capability is improved by over 10%, the solar absorption ratio alpha s of the coating is about 0.152 and the thermal emissivity epsilon is about 0.886 and is equivalent to that of a ZnO white paint under the same surface density.

Description

technical field [0001] The invention belongs to the technical field of spacecraft space environment engineering and thermal control. Specifically, the invention relates to a radiation-proof thermal control coating and a manufacturing method thereof. Background technique [0002] The ionizing total dose effect produced by the space radiation environment is the main reason for the damage of single machines and devices on the star. The total dose of space ionizing radiation mainly comes from radiation belt electron radiation, solar high-energy proton radiation, and bremsstrahlung produced during electron radiation. [0003] In theory, any material has the function of radiation protection, as long as the thickness of the material is sufficient, the radiation can be completely shielded. But for satellites, this infinitely increased defense method is not feasible. If the existing materials on the satellite can be used to improve it and improve its protection against the space ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D7/12C09D5/32B64G1/54
Inventor 刘宇明沈自才李蔓赵春晴张凯
Owner BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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