New method of synthesis of SiO2 spheres used as raw material for colloidal sol-gel synthesis

Barbara Janoszczyk; Jan Wojcik; Lidia Czyzewska; Yu. A. Pazdersky

doi:10.1117/12.285619

5 August 1997 New method of synthesis of SiO₂ spheres used as raw material for colloidal sol-gel synthesis

Barbara Janoszczyk, Jan Wojcik, Lidia Czyzewska, Yu. A. Pazdersky

Proceedings Volume 3189, Technology and Applications of Light Guides; (1997) https://doi.org/10.1117/12.285619
Event: Technology and Applications of Lightguides, 1996, Krasnobrod, Poland

Abstract

In the face of actual advantage of demand over the supply of telecommunication optical fibers especially single mode ones a great significance has, so far unsolved, problem of increasing of production efficiency of these fibers. The method of glass production from gas phase permits to synthesize very high purity glass, but unfortunately is less efficient. High efficiency of production of large products from ultrapure SiO₂ may be obtained owing to colloidal sol-gel method. For this method as starting material colloidal silica of optical fiber purity and of optimal particle size 500 - 1000 nm should be used. Among the possibilities of production of such silica there is one, consisting in synthesis of monodispersive silica spheres by hydrolitycal polycondensation of tetraetoxysilane in basic media. It was proposed by Stober and modified later by Bogush. This paper describes further modification of the mentioned method of synthesis in liquid phase, permitting to increase the efficiency of production of high quality colloidal silica.

Citation Download Citation

Barbara Janoszczyk, Jan Wojcik, Lidia Czyzewska, and Yu. A. Pazdersky "New method of synthesis of SiO₂ spheres used as raw material for colloidal sol-gel synthesis", Proc. SPIE 3189, Technology and Applications of Light Guides, (5 August 1997); https://doi.org/10.1117/12.285619

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KEYWORDS

Optical spheres

Particles

Silica

Optical fibers

Chemical analysis

Glasses

Liquids

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