NDLI: Sol-gel materials for opto(electronic) applications

Content Provider	IEEE Xplore Digital Library
Author	Maruszewski, K.
Copyright Year	2005
Description	Author affiliation: Institute of Materials Science and Applied Mechanics, Wroclaw University of Technology, Smoluchowskiego 25, 50-370 Wroclaw, Poland, tel. +(48)-(71)-320-211, fax +(48)-(71)-321-1235, e-mail: krzysztof.maruszewski@pwr.wroc.pl; Electrotechnical Institute, Sklodowskiej-Curie 55/61 50-369 Wroclaw, Poland (Maruszewski, K.)
Abstract	Conventional glass preparation requires melting of precursors at high temperatures, rapid cooling and subsequent vitrification of the glassy material. This procedure highly restricts choice of substances which can be entrapped in the glass products. Basically only metal oxides and some inorganic salts can survive such drastic conditions avoiding thermal decomposition. Furthermore, the way in which conventional glass is produced makes thin films preparation extremely cumbersome and the only method of preparation of porous classical glasses requires etching or partial dissolving (e.g. Vycor® glass). On the other hand glass and glassy materials possess several useful features for e.g. optical applications such as transparency, homogeneity, mechanical sturdiness, high refractive index etc. An alternative approach to glass and glass-like materials production is offered by the sol-gel technology. The process itself is known for more than a century, but it has gained a new importance in the last two decades after pioneering results of Dislich. He and other researchers improved the chemistry of the process so much that it is now possible to obtain samples in days (or even hours — in case of thin films) rather than months (or years) like in the case of the early samples. The sol-gel technique is based on hydrolysis of liquid precursors and formation of colloidal sols. The precursors are usually organosilicates (e.g. TEOS — tetraethoxysilane) giving silicate sol-gel materials. However, the method is not restricted to the silica compounds — for example precursors based on Ti, Zr, V etc.
Starting Page	164
Ending Page	165
File Size	394542
Page Count	2
File Format	PDF
ISBN	0780395530
DOI	10.1109/POLYTR.2005.1596509
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-10-23
Publisher Place	Poland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transistors Optical materials Temperature Cooling Vitrification Glass products Thermal decomposition Ultraviolet sources Etching Optical films
Content Type	Text
Resource Type	Article

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