Aging of solar selective Cr-SiO absorbers

M. Djahanbakhsh; J. Eldring; Boris Kluge; Ludwig K. Thomas

doi:10.1117/12.185363

9 September 1994 Aging of solar selective Cr-SiO absorbers

M. Djahanbakhsh, J. Eldring, Boris Kluge, Ludwig K. Thomas

Proceedings Volume 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII; (1994) https://doi.org/10.1117/12.185363
Event: Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, 1994, Freiburg, Germany

Abstract

Thin films of CR-SiO-cermets produced by evaporation on metal substrates show spectral selectivity. This property depends not only on the substrate material,m the average composition and the thickness of the film but also on the conditions of the preparation. In particular the temperature of the substrate during preparation has a strong influence on the change of selectivity during ageing. Ageing processes have been investigated in the temperature range 400 to 800 degree(s)C in Ar-atmosphere for time periods up to 42 days by means of optical measurements, X-ray analysis and other properties. The main effect is the decrease of the thickness of the film and a change of the structure. By dissociation of the SiO into Si and SiO₂ all chromium-silicides have been observed which are known from the binary Cr-Si-constitution diagram with the exception of CrSi. Some formation of Cr₂O₃ was observed not because of the development of oxygen by the reduction of SiO₂ but by residual oxygen in the Ar-atmosphere.

Citation Download Citation

M. Djahanbakhsh, J. Eldring, Boris Kluge, and Ludwig K. Thomas "Aging of solar selective Cr-SiO absorbers", Proc. SPIE 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, (9 September 1994); https://doi.org/10.1117/12.185363

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available