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Sol-Gel Nir-Reflective Multilayer Coatings On Glass Through Uvpolymerizable Ceramic Nanoparticles

Published online by Cambridge University Press:  10 February 2011

M. Mennig ,
P. W. Oliveira  and
H. Schmidt
M. Mennig
Affiliation:
Institute for New Materials, gem. GmbH, Im Stadtwald 43, D-66123 Saarbrücken, Germany
P. W. Oliveira
Affiliation:
Institute for New Materials, gem. GmbH, Im Stadtwald 43, D-66123 Saarbrücken, Germany
H. Schmidt
Affiliation:
Institute for New Materials, gem. GmbH, Im Stadtwald 43, D-66123 Saarbrücken, Germany
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Abstract

A new preparation route for an dielectric NIR-reflexion filter on glass is described. Coating sols are synthesized from SiO2 and TiO2 nanoparticles with photopolymerizable surface ligands. A 5-layer stack consisting of 2 SiO2 and 3 TiO2 layers was deposited on float glass by angledependent dip-coating (ADDC) with a fixed angle of 4° to the vertical and subsequent UV-curing. Finally, the whole stack was densified at 450 °C without cracking or discolouring. UV-vis-NIR transmittance and reflectance spectra show a steep increase of reflectance at 750 nm. In the range between 800 nm and 1200 nm, the reflectance is > 80 %. The visible transmittance is about 72 % due to single reflexion peaks. The bandwidth of the NIR reflection filter prepared by ADDC is about 200 nm larger and its maximum reflectance is only 5 % smaller compared to vertical dip-coating. The interference layer stack shows excellent stability in Taber Abraser, rubber, saline and UV tests, indicating a high potential for practical application.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 576: Symposium DD – Organic/Inorganic Hybrid Materials II , 1999 , 415
Copyright
Copyright © Materials Research Society 1999

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