Optical Properties of Ni/NiO_x as Infiltration Agent in Cermet Solar Ir Absorber

摘要

The Ni/NiO_x films were deposited onto micro-glass substrates by spray pyrolysis(SPD).As precursors,aqua nickel acetate solutions were used.Deposition parameters such as temperature substrate and spraying solution concentration were varied for optimizing the Ni/NiO_x cermet properties.The optical properties of the films(a,e)were correlated with their chemical composition,crystalline structure and morphology.At the deposition condition,the major phase is cubic NiO.The annealing increases the crystallinity degree offering good values of solar absorbance(alpha=0.91)and emittance(epsilon=0.07).