Silica-based versus silica-titania sol-gel materials - comparison of the physical properties: surface tension, gelation time, refractive index and optical transmittance

• Autorzy: Ulatowska-Jarża A. , Hołowacz I. , Wysocka K. , Podbielska H.
• Języki publikacji: EN

Abstrakty

EN

Knowledge of the physical parameters and optical constants of sols and sol-gel materials is important in view of their possible applications. In this work, silica and silica-titania sols were examined. Gelation time, surface tension, refractive index and optical transmittance were measured. The sol-gel materials were produced from the silica precursor Si(OC2H5)4 mixed with the titanium dioxide precursor Ti(OC2H5)4 and 96% ethyl alcohol. It was stated that the surface tension of pure silica sols is much higher than in case of silica-titania sols. The refractive index of fresh samples is lower than of stored sols. The transmittance is highest for the fresh samples and it decreases with gelation time; however, this effect is stronger for silica-titania materials. By manipulating with the solvent content and titania addition, the required refractive index may be obtained.

Słowa kluczowe

EN

silica-titania sol-gel materials; surface tension; gelation time; refractive index; optical transmittance

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2009
• Tom: Vol. 39, nr 1
• Strony: 211--220
• Opis fizyczny: Bibliogr. 26 poz.

Twórcy

autor

Ulatowska-Jarża A.

autor

Hołowacz I.

autor

Wysocka K.

autor

Podbielska H.

• Bio-Optics Group, Institute of Biomedical Engineering and Instrumentation, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

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