航天飞行器用高发射率红外辐射涂层的制备及性能研究  

Preparation and Properties of High-temperature Resistant Infrared Radiant Coating with High Emissivity for Spacecraft

作　　者：刘磊春 史胜 许海建 李春来 杨芮 罗志强[1] 陈文旗[1] 陈一[1] Liu Leichun;Shi Sheng;Xu Haijian;Li Chunlai;Yang Rui;Luo Zhiqiang;Chen Wenqi;Chen yi(Shanghai Spaceflight Precision Machinery Institute,Shanghai 201600,China)

机构地区：[1]上海航天精密机械研究所,上海201600

出　　处：《涂料工业》2023年第8期8-13,19,共7页Paint & Coatings Industry

基　　金：上海市启明星基金项目(21QA1403900)。

摘　　要：以碱金属氢氧化物及其氧化物和SiC等复配得到了高发射率红外辐射粉料,然后与硅橡胶混合配置,再通过空气喷涂法制备得到了高发射率红外辐射涂层。通过力学、热学、红外辐射、隔热试验等对涂层的各项性能进行了表征。结果表明:辐射涂层具有高红外发射率(>0.85),表现出优异的隔热性能。与添加1 mm长的碳纤维制备的涂层相比,3种添加500μm的短切玻璃纤维制备的自研辐射涂层具有更好的力学性能、界面结合强度以及表面状态。综合对比3种自研辐射涂层,其中添加由SiC以及铁、铝、镁的氧化物组成的辐射填料制备的涂层A效果最优,红外发射率高达0.93,拉伸强度达到2.89 MPa,断裂伸长率达到114%,拉伸剪切强度达到1.36 MPa。The high-emissivity infrared radiation powders were obtained by mixing alkali metal hydroxide and its oxides with SiC.The powder was mixed with silicone rubber to prepare infrared radiation coating via air spraying.The properties of the coating were characterized by mechanical,thermal,infrared radiation and heat insulation tests.The results showed that the radiation coating had high infrared emissivity(>0.85)and showed excellent thermal insulating properties.In addition,compared with the coating containing 1 mm long carbon fiber,three self-developed radiation coatings enhanced by 500μm chopped glass fiber had better mechanical properties,interfacial bonding strength and surface morphology.Comprehensively comparing the three kinds of self-developed radiation coating,the coating A prepared by adding radiation filler composed of SiC and oxides of iron,aluminum and magnesium had the best effect:infrared emissivity up to 0.93,tensile strength was 2.89 MPa,elongation at break was 114%and tensile shear strength 1.36 MPa.

关 键 词：红外辐射 隔热 硅橡胶 红外辐射涂层 红外发射率 

分 类 号：TQ637.4[化学工程—精细化工]