Gel–glass transition in silica and nitrided silica aerogels – experiment and computer modelling

• Autorzy: Szaniawska K. , Murawski L. , Rybicki J. , Witkowska A. , Walewski M.
• Konferencja: 6th Seminar Porous Glasses-Special Glasses, PGL 2002, Szklarska Poręba, 22-26.IX.2002 r.
• Języki publikacji: EN

Abstrakty

EN

Nitrided silica aerogel was sintered at 1600 °C in vacuum or nitrogen atmosphere and the effect of densification was compared with that observed in silica aerogel. It has been shown that homogeneous oxynitride glasses containing 8.4–13 wt% can be obtained by densification of nitrided aerogels. The densification process of nitrided aerogels was simulated by computer modeling using classical molecular dynamics (MD) simulations. MD simulations have shown that densification process proceeds in a similar way as in the experiment. In addition, the simulations indicate that oxynitride glasses can be obtained by densification of Si–O–N system.

Słowa kluczowe

EN

sol-gel method; aerogels; silica; nitridation; molecular dynamics simulations

PL

metoda zol-żel; aerożel; krzemionka

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2003
• Tom: Vol. 33, nr 1
• Strony: 75--81
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Szaniawska K.

• Faculty of Applied Physics and Mathematics, Technical University of Gdańsk, ul. Gabriela Narutowicz 11/12, 80-952 Gdańsk, Poland

autor

Murawski L.

• Faculty of Applied Physics and Mathematics, Technical University of Gdańsk, ul. Gabriela Narutowicz 11/12, 80-952 Gdańsk, Poland

autor

Rybicki J.

• Faculty of Applied Physics and Mathematics, Technical University of Gdańsk, ul. Gabriela Narutowicz 11/12, 80-952 Gdańsk, Poland

autor

Witkowska A.

• Faculty of Applied Physics and Mathematics, Technical University of Gdańsk, ul. Gabriela Narutowicz 11/12, 80-952 Gdańsk, Poland

autor

Walewski M.

• Faculty of Chemistry, Technical University of Gdańsk, ul. Gabriela Narutowicza 11/12,80-952 Gdańsk, Poland

Bibliografia

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• [5] Szaniawska K., Murawski L., Pastuszak R., Walewski M., Fantozzi G., J. Non-Cryst. Solids 286 (2001), 58.
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• [11] Rapaport D.C., Art of the Molecular Dynamics Simulation, University Press, Cambridge 1995.
• [12] Abrahamson A.A., Phys. Rev. 178 (1969), 76.