SOL-GEL TECHNOLOGY OF PRODUCED SYNTHETIC SILICА DIOXIDE AND QUARTZ GLASS
APPLICATION
Synthetic silicа dioxide (SSD) and quartz glass are obtained by the sol-gel technology from high-purity initial components. The quartz glasses can be used in microelectronics, microwave technology, optics, as instrument windows, light filters with selective absorption of light radiation over a wide range of wavelengths.
ADVANTAGES OF SOL-GEL TECHNOLOGY
The sol-gel technology makes it possible to obtain SSD and glasses from organometallic silicon compounds of a high degree of purity by passing the stages of enrichment and melting at relatively low temperatures (up to 1200 °C). The thickness of quartz glasses obtained by the direct sol-gel method ranges from 1 to 5 mm and requires only grinding and polishing. Energy-saving sol-gel technology provides excellent optical, physical-mechanical and chemical properties of quartz glass.
CHARACTERISTICS OF SYNTHETIC SILICA DIOXIDE
Grain size is 1-15µm
The concentration of OH groups in grainsis50-300 ppm
The content of impurities of alkaline and transitional elements is less than 0.01 ppm
CHARACTERISTICS OF QUARTZ GLASSES
Refractive index of glass(l=0.633) is 1,4528
Glass transmission at l from 0.2 µm to 1 µm is 85-90 %
Thermal expansion coefficient of glassis 5,5×10-6/оС
The concentration of OH groups is 2-300 ppm
Density is 2,20 g/cm3
COOPERATION OPTIONS
Transfer of know-how to manufacturers on the basis of a license agreement, development of new compositions alloyed with rare earth elements, SSD and glasses.
VLADIMIR GAISHUN
HEAD OF ADVANCED MATERIALS RESEARCH LABORATORY
CANDIDAT OF PHYSICS AND MATHEMATICS, DOCENT
TEL. +(375 232) 50-38-22, FAX +(375 232) 50-38-13,
E-MAIL: VGAISHUN@GSU.BY, http://pnil.gsu.by/
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