Abstract:

A method for preparing a novel bixbyite non-selective coating for solar thermal conversion is described. The coating is formed by a thermal reaction between a titania sol–gel precursor with a copper manganese spinel to form a new material, Cu0.44Ti0.44Mn0.84Fe0.28O3, with a bixbyite structure. The effect of temperature and ratio between the two components on the formation of the bixbyite layer (deposited on Inconel by spray-coating) was studied. The absorptance of the films (AM 1.5; 335–2500nm) with a thickness of 10±2µm after annealing at 2h at 650°C and 750°C was 97.4% and 94.7%, respectively. This synthesis represents a novel approach in which the final solar thermal coating is formed as a continuous and uniform layer which combines both the absorber and the ceramic binder. The developed material shows promising results for future applications as absorber in solar thermal energy conversion.•A new material combining the absorber and a ceramic matrix was formed.•This material was used for solar thermal application with high absorptivity.•The formation of the material occurred by thermal treatment of a sprayed thin film.

Notes:

Accession Number: S0927024813004030; Author: Tulchinsky, Dani (a); Author: Uvarov, Vladimir (b); Author: Popov, Inna (b); Author: Mandler, Daniel (a, ⁎); Author: Magdassi, Shlomo (a, ⁎); Affiliation: Institute of Chemistry, the Hebrew University of Jerusalem, Jerusalem 91904, Israel; Affiliation: The Unit for Nanoscopic Characterization, the Center for Nanoscience and Nanotechnology, the Hebrew University of Jerusalem, Jerusalem 91904, Israel; Number of Pages: 7; Language: English;