Microtopographic characterization of graded Cr-Cr2O3 cermet solar coatings

Manuel Filipe M. Costa; Vasco Teixeira

doi:10.1117/12.437107

14 August 2001 Microtopographic characterization of graded Cr-Cr₂O₃ cermet solar coatings

Proceedings Volume 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications; (2001) https://doi.org/10.1117/12.437107
Event: IV Iberoamerican Meeting of Optics and the VII Latin American Meeting of Optics, Lasers and Their Applications, 2001, Tandil, Argentina

Abstract

An increasing effort is put our days on the development of new efficient solar energy collectors either for quantum or thermal conversion as the conventional energy sources availability diminishes and its use environmental impact builds up to alarming levels. On this communication we will refer to thermal converters focusing on the roughness and microtopographic inspection of surface thin films and spectrally selective coatings. Physically Vapor Deposited coatings like sputter deposited metal oxide and nitride thin multilayered and graded ones can be used in spectrally selective surfaces for thermal collectors and energy- efficient windows. The energy conversion efficiency of Cr- Cr₂O₃ cermet solar absorbers depends on its chemical and physical structural characteristics and related optical properties like reflectance, emittance, absorptance and transmittance. The roughness and topographic characteristics of the produced coatings will greatly condition its relevant properties. A careful integral evaluation of the micro- relief structure, and not only the roughness values and roughness regimes, of these Cr-Cr₂O₃ cermet coatings needs to be performed.

Citation Download Citation

Manuel Filipe M. Costa and Vasco Teixeira "Microtopographic characterization of graded Cr-Cr₂O₃ cermet solar coatings", Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); https://doi.org/10.1117/12.437107

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