Preparation and Properties of K2SiO3/BaSO4 Inorganic High-Temperature Resistant Thermal Control Coating

Yujie Chen

doi:10.6919/ICJE.202505_11(5).0006

Authors

Yujie Chen

DOI:

https://doi.org/10.6919/ICJE.202505_11(5).0006

Keywords:

Barium Sulfate; Potassium Silicate; Thermal Control Coating; High Temperature Resistance; Solar Absorption Ratio.

Abstract

In order to enhance the high-temperature-resistant performance of spacecraft in deep-space exploration, and at the same time to improve the spectral performance of inorganic thermal-control coatings, barium sulphate powder, which has a high reflectance in the whole UV/visible/near-infrared wavelength range, is used as a filler, and potassium silicate, which has a better space-resistant performance, is used as a binder, so as to research the effects of curing agent, pigment/base ratio, and thickness on the coating's thermal-control and high-temperature-resistant performance, and to prepare the inorganic The inorganic heat-controlled coatings were prepared. The experimental results show that the thermal control performance of the K2SiO3/BaSO4 coatings have excellent thermal control performance ( =0.12, =0.96), and the irradiation absorption ratio is as low as 0.125, and the appearance and spectral properties of the coating remain good after 300 ℃/24 h high-temperature test. The coating can meet the application requirements of high temperature resistance, high radiation heat dissipation and long life of future spacecraft.

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References

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