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Optimization of sol-gel/pyrolysis routes to silicon oxycarbide glasses
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SYSNO ASEP 0381149 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Optimization of sol-gel/pyrolysis routes to silicon oxycarbide glasses Tvůrce(i) Strachota, Adam (UMCH-V) RID, ORCID
Černý, Martin (USMH-B) RID, ORCID, SAI
Chlup, Zdeněk (UFM-A) RID, ORCID
Šlouf, Miroslav (UMCH-V) RID, ORCID
Hromádková, Jiřina (UMCH-V) RID
Pleštil, Josef (UMCH-V) RID
Šandová, Hana (UMCH-V)
Glogar, Petr (USMH-B) RID
Sucharda, Zbyněk (USMH-B)
Havelcová, Martina (USMH-B) RID, ORCID
Schweigstillová, Jana (USMH-B) RID, ORCID, SAI
Dlouhý, Ivo (UFM-A) RID, ORCID
Kozák, Vladislav (UFM-A) RID, ORCIDZdroj.dok. Journal of Non-Crystalline Solids. - : Elsevier - ISSN 0022-3093
Roč. 358, č. 20 (2012), s. 2771-2782Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova silicon oxycarbide ; siloxane ; pyrolysis Vědní obor RIV CD - Makromolekulární chemie Vědní obor RIV – spolupráce Ústav struktury a mechaniky hornin - Kompozitní materiály
Ústav fyziky materiálu - Únava materiálu a lomová mechanikaCEP GA106/09/1101 GA ČR - Grantová agentura ČR CEZ AV0Z40500505 - UMCH-V (2005-2011) AV0Z30460519 - USMH-B (2005-2011) AV0Z20410507 - UFM-A (2005-2011) UT WOS 000309647400008 DOI 10.1016/j.jnoncrysol.2012.06.027 Anotace The optimization of the synthesis of silicon oxycarbide ceramics via the sol–gel/pyrolysis route is described, starting from several alkylalkoxysilanes and vinylalkoxysilanes. The main aim was to achieve low weight losses during cure and pyrolysis and also a compact ceramics morphology. The theoretical composition of the pyrolysates was changed between SiO1.5C and SiO1.2C2.3, by varying monomer types and ratios. An assessment of the real composition was performed using energy-dispersive X-ray spectroscopy. The smallest weight losses were obtained for the resins based on vinyltriethoxysilane and dimethyldiethoxysilane which were additionally modified by the addition of a small amount of boric acid. Somewhat higher weight losses combined with the best toughness were found for resins based on non-vinylated silsesquioxane with a low content on linear dimethylsiloxane units. As an alternative, a precursor (SiO0.9C2.8) was prepared via hydrosilylation, based on cyclic dimethylsiloxane oligomers interconnected to a network, but its weight losses were higher than those of sol–gel silicon oxycarbide. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2013
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