Počet záznamů: 1

Optimization of sol-gel/pyrolysis routes to silicon oxycarbide glasses

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, ORCID}
Zdroj.dok.	Journal of Non-Crystalline Solids. - : Elsevier - ISSN 0022-3093 Roč. 358, č. 20 (2012), s. 2771-2782
Poč.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 mechanika
CEP	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

Počet záznamů: 1