航天器用低太阳吸收比无机热控涂层制备及性能研究

Preparation and Performance Study of Inorganic Thermal Control Coatings for Spacecraft with Low Solar Absorption Ratio

航天技术的发展和深空探测的需要,对热控涂层的光热性能和空间环境稳定性提出了更加苛刻的要求。为此,文章设计内核为Zn 2SiO 4、外壳为具有可见光波段高透过性SiO 2的核壳结构颜料,并将其制备成热控涂层。试验结果表明:涂层T-Zn 2SiO 4@SiO 2的太阳吸收比为0.09,具有超低吸收特性。在此基础上,文章系统性表征了涂层在真空-紫外辐照后太阳吸收比和内部缺陷的变化,初步解析了紫外辐照后光学性能演化机理,可为研制低太阳吸收比、高稳定性新型热控材料提供新思路。

The development of space technology and the needs for deep space exploration have put forward more stringent requirements on the photothermal performance and space environment stability of paint-based thermal control coatings.For this reason,the core-shell structure pigment with Zn 2SiO 4 as the inner core and SiO 2 as the outer shell with high transmittance in visible wavelength are designed,and it is prepared as a thermal control coating.The test results indicate that the solar absorption ratio of coa￣ting T-Zn 2SiO 4@SiO 2 is 0.09,which has ultra-low absorption characteristics.On this basis,the changes in solar absorption ratio and internal defects of the coating after vacuum-ultraviolet irradiation are systematically characterized,and the evolution mechanism of optical properties after ultraviolet irradiation is preliminarily analyzed,which can provide a new idea for the development of a new type of thermal control material with low solar absorption ratio and high stability.