Please use this identifier to cite or link to this item: doi:10.22028/D291-24424
Title: A sol-gel derived AgCl photochromic coating on glasses
Author(s): Mennig, Martin
Fink, Claudia
Schmidt, Helmut K.
Language: English
Year of Publication: 1992
OPUS Source: XVI Congreso Internacional del Vidrio : proceedings of the congress / ed. by Alicia Durán ... — Vol 7. - Madrid, 1992. - (Boletín de la Sociedad Española de Cerámica y Vidrio ; 31-C), S. 281-286
SWD key words: Sol-Gel-Verfahren
Wässrige Lösung
Kolloidales Silber
DDC notations: 620 Engineering and machine engineering
Publikation type: Conference Paper
Abstract: A new sol-gel synthesis route for the preparation of a transparent photochromic coating based on silver halide crystals is described. Therefore a sodium alumo borosilicate sol synthesized for dip coatings glass surfaces is used. Porous layers of about 2 µm in thickness have been obtained after drying. Silver ions were introduced into the layer by an infiltration process with an aqueous silver nitrate solution, forming small silver colloids that can be converted into silver chloride particles by HCl vapour. The so prepared coatings show a reversible photochromic behaviour. After 15 minutes of UV illumination transmittance decreases from about 86 % to 36 %. The darkend coatings recover completely after thermal bleaching at about 400 °C. The reversible formation of silver colloids after UV irradiation could be followed directly by x-ray diffraction and electron microscopy. Surprisely the photo efficiency is much higher in the prepared coating than in molten photochromic glasses.
Link to this record: urn:nbn:de:bsz:291-scidok-27231
Date of registration: 24-Feb-2010
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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