Počet záznamů: 1

Preparation of silicon oxycarbide composites toughened by inorganic fibers via pyrolysis of precursor siloxane composites

  1. 1.
    0362897 - UMCH-V 2012 RIV PL eng J - Článek v odborném periodiku
    Strachota, Adam - Černý, Martin - Glogar, Petr - Sucharda, Zbyněk - Havelcová, Martina - Chlup, Zdeněk - Dlouhý, Ivo - Kozák, Vladislav
    Preparation of silicon oxycarbide composites toughened by inorganic fibers via pyrolysis of precursor siloxane composites.
    Acta Physica Polonica. A. Roč. 120, č. 2 (2011), s. 326-330 ISSN 0587-4246.
    [Annual Conference /12./ YUCOMAT 2010. Herceg Novi, 06.09.2010-10.09.2010]
    Grant CEP: GA ČR GA106/09/1101
    Výzkumný záměr: CEZ:AV0Z40500505; CEZ:AV0Z30460519; CEZ:AV0Z20410507
    Klíčová slova: silicon oxycarbide * SiOC * siloxane
    Kód oboru RIV: JI - Kompozitní materiály
    Impakt faktor: 0.444, rok: 2011
    http://przyrbwn.icm.edu.pl/APP/PDF/120/a120z2p25.pdf http://przyrbwn.icm.edu.pl/APP/PDF/120/a120z2p25.pdf

    The optimization of silicon oxycarbide (SiOC) synthesis (sol-gel/pyrolysis) is described, starting from methyltriethoxysilane, dimethyldiethoxysilane, tetraethoxysilane, ethyltriethoxysilane and propyltriethoxysilane. Variation of final elemental composition was tested via change of monomer ratios and combinations. The main aim was to achieve low weight losses during cure and pyrolysis and high micromechanical properties. Gas chromatography and mass spectroscopy was used to analyse the by-products of cure and pyrolysis, indicating a prominent role of cyclosiloxane and polyhedral oligomeric silsesquioxane (POSS) oligomers. Best results were obtained with high contents of methyltriethoxysilane in the monomers mixture.
    Trvalý link: http://hdl.handle.net/11104/0199072