Preparation and Properties of Solar Absorbing AAO Composite Oxide Film Coatings

• Main Authors: WEI Hong-yang, CHANG Meng-lei, CHEN Dong-chu, WANG Mei-feng, YE Xiu-fang
• Format: Article
• Language: zho
• Published: Journal of Materials Engineering 2017-11-01
• Series: Journal of Materials Engineering
• Subjects: anodic aluminum oxide; AC deposition; Cu-Ni nano composite particle; absorptivity; emissivity
• Online Access: http://jme.biam.ac.cn/CN/Y2017/V45/I11/42

The highly ordered porous anodic alumina was prepared by anodic oxidation technology, after being treated by AC phosphoric pore broadening, the Cu-Ni nano composite particles were deposited into anodic alumina pores by AC frequency with 50Hz in different voltages, different time and different temperatures. The spectra result shows that the coating prepared under the conditions of voltage is 12V, time is 600s, temperature is 25℃ has good solar absorption performance, the absorptivity is 0.91, emissivity is 0.18, quality factor is 4.9. The SEM and XRD analysis show that CuAl₂O₄/Cu-Ni composite nanorods were deposited on the surface of the composite oxide coating. After heat treatment at 600℃, the solar absorption and infrared emission of target coating have a small fluctuation and the thermal stability of the coating system is greatly improved. The existing of CuAl₂O₄ limits the diffusion of metal particles under high temperature environment at the interface, which prevents the Cu/Ni from being oxidized.