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Microtopographic characterization of graded Cr-Cr2O3 cermet solar coatings
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Paper 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.

Paper Details

Date Published: 14 August 2001
PDF: 4 pages
Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); doi: 10.1117/12.437107
Show Author Affiliations
Manuel Filipe M. Costa, Univ. do Minho (Portugal)
Vasco Teixeira, Univ. do Minho (Portugal)

Published in SPIE Proceedings Vol. 4419:
4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications
Vera L. Brudny; Silvia A. Ledesma; Mario C. Marconi, Editor(s)

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