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Proceedings Paper

Thermal stability studies of paint coatings for solar collector panels
Author(s): Zorica Crnjak Orel; N. Leskovsek; Boris Orel; Michael Koehl; Ulrich Frei; G. G. Descy
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Paper Abstract

TSSS paint coatings were prepared by using FeMnCuOx pigment in combinations with phenoxy and silicone resins. The spectral selectivity achieved was 0.92/0.14 for the first and 0.87/0.18 for the second type of the paint. The surface of phenoxy resin based coatings is characterized by pigment particles protruding from the surface, while silicone based paints exhibit a much smoother surface. Abrasion resistance and adhesion of both types of coatings were enhanced by cross linking the resin binder with diisocyanate hardener. Cured coatings withstand temperatures up to 150 degree(s)C but show degradation in 20 days when aged at 180 degree(s)C. Cross-linking and degradation mechanisms of both types of coatings were studied by using FT-IR spectroscopy and termogravimetric measurements, cycling and aging tests.

Paper Details

Date Published: 25 November 1992
PDF: 12 pages
Proc. SPIE 1727, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Selective Materials, Concentrators and Reflectors, Transparent Insulation and Superwindows, (25 November 1992); doi: 10.1117/12.130488
Show Author Affiliations
Zorica Crnjak Orel, Boris Kidric Institute of Chemistry (Slovenia)
N. Leskovsek, Boris Kidric Institute of Chemistry (Slovenia)
Boris Orel, Boris Kidric Institute of Chemistry (Slovenia)
Michael Koehl, Fraunhofer-Institut fuer Solare Energiesysteme (Germany)
Ulrich Frei, Solar Energy Pruf- und Forschungstelle ITR (Switzerland)
G. G. Descy, European Solar Engineering (Belgium)


Published in SPIE Proceedings Vol. 1727:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XI: Selective Materials, Concentrators and Reflectors, Transparent Insulation and Superwindows

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