一种空间高稳定高反射辐射散热涂料、涂层及其制备方法
By designing a combination of base and top coatings and using materials such as zinc titanate, indium tin oxide, gallium oxide, and barium sulfate, the reflectivity and radiation resistance of the coating were improved. This solved the problem of insufficient performance of existing thermal control coatings in medium and high orbit spacecraft, and achieved long-term stability and high reflectivity under harsh radiation environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING SATELLITE MFG FACTORY
- Filing Date
- 2024-10-23
- Publication Date
- 2026-07-17
AI Technical Summary
Existing low-absorption, high-emission thermal control coatings cannot meet the performance requirements of harsh radiation environments in medium- and high-orbit spacecraft, especially given their high solar absorption and sensitivity to optical defects caused by ionizing radiation, thus failing to meet the high precision and long lifespan requirements of modern spacecraft.
The coating employs a combination of a base coat and a top coat. The base coat consists of zinc titanate, indium tin oxide, and potassium silicate aqueous solution, while the top coat consists of gallium oxide, barium sulfate, and potassium silicate aqueous solution. By using fillers of different particle sizes, the reflectivity and radiation resistance of the coating are improved, ensuring the stability of the coating in high-radiation environments.
The coating achieves long-term stability and high reflectivity in high-radiation environments, with a solar absorptivity of less than 0.09 and a hemispherical emissivity between 0.90 and 0.92. It can withstand 5000 ESH vacuum-ultraviolet irradiation and electron irradiation with minimal performance changes and is suitable for various spacecraft substrates.