金属氧化物颜料对隔热涂料发射率和反射率的影响

Influence of Metallic Oxide Pigment on Emissivity and Solar Reflectance of Insulation Coating

基于热带和亚热带地区对外墙涂料光学性能的要求,研究了涂料组分中各类金属氧化物颜料对其长波发射率及太阳能反射率的影响.结果表明：金属氧化物黑色颜料中的铬铁黑涂料在紫外波段和可见光波段可实现0.95,0.94的高吸收率,在近红外波段吸收率下降为0.45,反射率为0.38;钛铬黄涂料的热反射能力优于铁黄涂料,且钛铬黄涂料在近红外范围的反射率基本不随色浆掺量增加而变化.在1 000-2 500nm光谱范围内,色浆掺量相同的铁红涂料和铁黄涂料的反射率曲线基本重合;在800-1 000nm光谱范围内,铁红涂料相比铁黄涂料具有更强的吸收能力.

Based on the optics requirement of energy saving coatings used on outside wall in tropical and subtropical areas, a series of experiments were made for research on the influence of metallic oxide paints on the emissivity and solar reflectance of building coatings. The results indicate that among black metallic oxide pigment, coatings added with nickel iron chromite black spinel would achieve a high absorptance with 0.95,0. 94 in ultraviolet band and visible spectrum. The absorptance of the coatings with nickel iron chromite black spinel would decrease to 0.45 in near-infrared band, and the reflectivity would reach 0.38. The reflectivity of titanium chrome yellow was better than that of ferrite yellow, and in the near-infrared range, the refleetivity of titanium chrome yellow keeps stable with the increasing of its content. In the spectrum range of 1 000 -2 500 nm, the reflectivity curve of iron oxide red and ferrite yellow with the same content almost coincides. In the spectrum range of 800 sorptance in comparison with ferrite yellow. 1 000 nm, the iron oxide red showing greater ab-sorptance in comparison with ferrite yellow.