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Proceedings Paper

Industrial Realization Of Low-Emittance Oxide/Metal/Oxide Films On Glass
Author(s): K. Hartig; W. D. Munz; M. Scherer; V. Wittwer; Stahl
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Paper Abstract

Energy consumption can be reduced from room heating using coated architectural glass panes. With a system oxide/metal/oxide high transmittance in the visible as well as high reflectance in the thermal infrared can be achieved2-7. This heat mirrors can be deposited economically by diode- and high rate sputtering. Of most interest are heat mirrors based on Cu, Ag and Au coatings. In the visible Au and Cu show a remarkable amount of absorptance which leads to a clear decrease in visible light transmittance. Best results are obtained with Ag based coatings. Ag is still high reflective even at the near U-V region. This part of re-flected energy can be converted to transmittance by a properly designed optical interference stack of the type oxide/metal/oxide. For a single pane an average value of visible light transmittance between 380 nm and 780 nm of 81 % is possible without loss of infrared reflec-tance at 8 4m below 90 % which corresponds to a low-emittance of 0.1. For this high quality a smooth growth of the Ag layer is necessary. Experiments have shown that a bombardement of the Ag layer with high energetic ions must be avoided as far as possible.

Paper Details

Date Published: 1 December 1983
PDF: 5 pages
Proc. SPIE 0428, Optical Materials and Process Technology for Energy Efficiency and Solar Applications, (1 December 1983); doi: 10.1117/12.936293
Show Author Affiliations
K. Hartig, Leybold-Heraeus GmbH (United States)
W. D. Munz, Leybold-Heraeus GmbH (United States)
M. Scherer, Leybold-Heraeus GmbH (United States)
V. Wittwer, Fraunhofer Institut (United States)
Stahl, Fraunhofer Institut (United States)

Published in SPIE Proceedings Vol. 0428:
Optical Materials and Process Technology for Energy Efficiency and Solar Applications
Carl M. Lampert, Editor(s)

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