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采用平面磁控溅射技术在玻璃上制备的金属铝膜,随氩气压强的升高及膜层的加厚而铝膜表面变得粗糙、反射率下降。以渐变不锈钢-碳为吸收层,分别以铝膜、不锈钢膜及玻璃为衬底构成的选择性吸收涂层,太阳吸收率可达95％(AM2),热发射率则分别为0.05、0.18及0.63。光谱选择性吸收涂层的热发射率主要取决于衬底材料的红外反射率。
The metal aluminum film prepared on glass by planar magnetron sputtering technology, with the increase of argon pressure and the thickening of the film, the surface of the aluminum film becomes rough and the reflectivity decreases. The selective absorption coating composed of a gradient stainless steel and carbon as the absorbing layer and aluminum, stainless steel and glass substrates, respectively, has an absorptivity of up to 95% (AM2) and a thermal emissivity of 0.05,0.18 and 0.63. The thermal emissivity of a spectrally selective absorbing coating mainly depends on the infrared reflectance of the substrate material.