Thickness sensitive spectrally selective (TSSS) paint for solar collectors: optical properties, surface characterization and application properties

Abstract

A black paint was prepared which is suitable for the automatic application technique known as coil-coating. Different formulated black paints were applied on aluminium at different thicknesses (1–20 μm), and the properties of the corresponding coatings were evaluated. The influence of the paint formulation on the optical and surface properties of the TSSS paint coating aluminium is discussed in detail. Moderate spectral selectivity ( a s = 0.92, e T = 0.42 ) was achieved for a coating with thickness 3–4 μm).