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2005 | 3 | 3 | 452-469
Tytuł artykułu

Organic-inorganic hybrid materials based on N=C=O functionalised silan modified with titanium and zirconium

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Języki publikacji
EN
Abstrakty
EN
This work investigates the influence of the precursor trimethylsilil isocyanate on the sol-gel synthesis of hybrid materials. The obtained Si−O−C−N network is additionally modified by titanium and zirconium alcoxypropoxides in the range of 10 to 30 wt. %. The structure of the obtained hybrid materials before and after pyrolysis up to 1100°C was investigated by methods of XRD, FTIR and 29Si MAS NMR. We established that the hybrid structure was stable up to 600°C based on IR study. The structural transformation of the hybrid materials into oxycarbonitrogen system started at 800°C. The network of the hybrids modified by titanium remained stable and amorphous up to the final temperature of the pyrolysis (1100°C) compared to the gels modified by more than 10 wt.% Zr. It was confirmed by XRD analysis that the last mentioned are nanocomposite materials, built from carbooxynitrogen vitreous matrix and ZrO2-nanocrystals (tetragonal). The NMR method verified the presence of heterometallic bonds (Si−O−Ti and Si−O−Zr) and Q4, ZrQ3 or TiQ3, NSiO3 and D structural units in the gels.
Wydawca

Czasopismo
Rocznik
Tom
3
Numer
3
Strony
452-469
Opis fizyczny
Daty
wydano
2005-09-01
online
2005-09-01
Twórcy
  • Department of Silicate Technology, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria, c gugy79@abv.bg
  • Department of Silicate Technology, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria
  • Department of Silicate Technology, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria
  • Department of Silicate Technology, University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria
  • Department of Ceramics and Glass Engineering, Aveiro University, 3810-193, Aveiro, Portugal, tpetkova@cv.ua.pt
  • Department of Ceramics and Glass Engineering, Aveiro University, 3810-193, Aveiro, Portugal
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_BF02479275
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