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Preparation And Properties Of Solar Selective Absorbers Based On AlCuFe AND AlCuFeCr Thin Films: Industrial Aspects

Published online by Cambridge University Press:  10 February 2011

T. Eisenhammer ,
H. Nolte ,
W. Assmann  and
J. M. Dubois
T. Eisenhammer
Affiliation:
TiNOX Gesellschaft ffir Energieforschung und Entwicklung mbH, Schwere Reiter Str. 35/2B, 80797 M¨nchen, Germany
H. Nolte
Affiliation:
Sektion Physik, Universitit Miinchen, D-85748 Garching, Germany
W. Assmann
Affiliation:
Sektion Physik, Universitit Miinchen, D-85748 Garching, Germany
J. M. Dubois
Affiliation:
LSG2M and GDR CINQ, Ecole des Mines de Nancy, Parc de Saurupt, 54042 Nancy CEDEX, France
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Abstract

Solar selective absorbers for thermal energy applications can be realized with films of quasicrystal forming alloys. Absorbers were produced by sputtering thin films of AlCuFe and AlCuFeCr. Alumina and floatglass were used as dielectric antireflective coatings, which are necessary for the required optical properties. For applications, several aspects are of importance: high solar absorptance and low thermal emittance have to be achieved. Moreover, the coatings have to show good adhesion and stability with respect to oxidation in air at elevated temperatures and exposure to humidity and condensation of water. The present study emphasizes these aspects, especially degradation stability, for coatings deposited on technical copper foils with large roughness. Oxidation stability is achieved easily, while humidity stability depends strongly on the choice of materials. The combination AlCuFeCr/floatglass turned out to be stable, while the combination AlCuFe/alumina is destroyed rapidly.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 553: Symposium LL – Quasicrystals , 1998 , 435
Copyright
Copyright © Materials Research Society 1999

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References

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