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 500 μm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。

关键词: 红外辐射, 隔热, 硅橡胶, 红外辐射涂层, 红外发射率

Abstract: The high-emissivity infrared radiation powders were obtained by mixing alkalimetal hydroxide and its oxides with SiC. The powder was mixed with silicone rubber to prepareinfrared radiation coating via air spraying. The properties of the coating were characterized bymechanical，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 500 μm chopped glass fiber had bettermechanical properties，interfacial bonding strength and surface morphology. Comprehensivelycomparing 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.

Key words: infrared radiation；thermal insulation；silicone rubber；infrared radiation 

中图分类号: 

• TQ637. 4