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

Strachota, Adam; Černý, Martin; Chlup, Zdeněk; Šlouf, Miroslav; Hromádková, Jiřina; Pleštil, Josef; Šandová, Hana; Glogar, Petr; Sucharda, Zbyněk; Havelcová, Martina; Schweigstillová, Jana; Dlouhý, Ivo; Kozák, Vladislav

doi:https://dx.doi.org/10.1016/j.jnoncrysol.2012.06.027

Number of the records: 1

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

1.

SYSNO ASEP	0381149
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Optimization of sol-gel/pyrolysis routes to silicon oxycarbide glasses
Author(s)	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}
Source Title	Journal of Non-Crystalline Solids. - : Elsevier - ISSN 0022-3093 Roč. 358, č. 20 (2012), s. 2771-2782
Number of pages	12 s.
Language	eng - English
Country	NL - Netherlands
Keywords	silicon oxycarbide ; siloxane ; pyrolysis
Subject RIV	CD - Macromolecular Chemistry
Subject RIV - cooperation	Institute of Rock Structure and Mechanics - Composite Materials Institute of Physics of Materials - Materials Fatigue, Friction Mechanics
R&D Projects	GA106/09/1101 GA ČR - Czech Science Foundation (CSF)
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
Annotation	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.
Workplace	Institute of Macromolecular Chemistry
Contact	Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
Year of Publishing	2013

Number of the records: 1