Stabler, Christina ; Reitz, Andreas ; Stein, Peter ; Albert, Barbara ; Riedel, Ralf ; Ionescu, Emanuel (2018)
Thermal Properties of SiOC Glasses and Glass Ceramics at Elevated Temperatures.
In: Materials, 11 (2)
doi: 10.3390/ma11020279
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
In the present study, the effect of the chemical and phase composition on the thermal properties of silicon oxide carbides (SiOC) has been investigated. Dense monolithic SiOC materials with various carbon contents were prepared and characterized with respect to their thermal expansion, as well as thermal conductivity. SiOC glass has been shown to exhibit low thermal expansion (e.g., ca. 3.2 × 10−6 K−1 for a SiOC sample free of segregated carbon) and thermal conductivity (ca. 1.5 W/(m∙K)). Furthermore, it has been observed that the phase separation, which typically occurs in SiOC exposed to temperatures beyond 1000–1200 °C, leads to a decrease of the thermal expansion (i.e., to 1.83 × 10−6 K−1 for the sample above); whereas the thermal conductivity increases upon phase separation (i.e., to ca. 1.7 W/(m∙K) for the sample mentioned above). Upon adjusting the amount of segregated carbon content in SiOC, its thermal expansion can be tuned; thus, SiOC glass ceramics with carbon contents larger than 10–15 vol % exhibit similar coefficients of thermal expansion to that of the SiOC glass. Increasing the carbon and SiC content in the studied SiOC glass ceramics leads to an increase in their thermal conductivity: SiOC with relatively large carbon and silicon carbides (SiC) volume fractions (i.e., 12–15 and 20–30 vol %, respectively) were shown to possess thermal conductivities in the range from 1.8 to 2.7 W/(m∙K).
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Stabler, Christina ; Reitz, Andreas ; Stein, Peter ; Albert, Barbara ; Riedel, Ralf ; Ionescu, Emanuel |
| Art des Eintrags: | Bibliographie |
| Titel: | Thermal Properties of SiOC Glasses and Glass Ceramics at Elevated Temperatures |
| Sprache: | Englisch |
| Publikationsjahr: | 10 Februar 2018 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Materials |
| Jahrgang/Volume einer Zeitschrift: | 11 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.3390/ma11020279 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | In the present study, the effect of the chemical and phase composition on the thermal properties of silicon oxide carbides (SiOC) has been investigated. Dense monolithic SiOC materials with various carbon contents were prepared and characterized with respect to their thermal expansion, as well as thermal conductivity. SiOC glass has been shown to exhibit low thermal expansion (e.g., ca. 3.2 × 10−6 K−1 for a SiOC sample free of segregated carbon) and thermal conductivity (ca. 1.5 W/(m∙K)). Furthermore, it has been observed that the phase separation, which typically occurs in SiOC exposed to temperatures beyond 1000–1200 °C, leads to a decrease of the thermal expansion (i.e., to 1.83 × 10−6 K−1 for the sample above); whereas the thermal conductivity increases upon phase separation (i.e., to ca. 1.7 W/(m∙K) for the sample mentioned above). Upon adjusting the amount of segregated carbon content in SiOC, its thermal expansion can be tuned; thus, SiOC glass ceramics with carbon contents larger than 10–15 vol % exhibit similar coefficients of thermal expansion to that of the SiOC glass. Increasing the carbon and SiC content in the studied SiOC glass ceramics leads to an increase in their thermal conductivity: SiOC with relatively large carbon and silicon carbides (SiC) volume fractions (i.e., 12–15 and 20–30 vol %, respectively) were shown to possess thermal conductivities in the range from 1.8 to 2.7 W/(m∙K). |
| Freie Schlagworte: | silicon oxycarbide, silicon oxide carbide, thermal transport, thermal conductivity, thermal expansion |
| Zusätzliche Informationen: | This article belongs to the Special Issue Polymer Derived Ceramics and Applications |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Mechanik Funktionaler Materialien 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie |
| Hinterlegungsdatum: | 13 Apr 2018 11:42 |
| Letzte Änderung: | 21 Nov 2023 07:33 |
| PPN: | |
| Sponsoren: | Financial support was provided from the Deutsche Forschungsgemeinschaft (IO 64/7-1, “High-Temperature Creep in SiOC-Based Glasses and Glass-Ceramics”)., EI furthermore acknowledges support from the EU COST Action CM1302 (European network “Smart Inorganic Polymers”, SIPs). |
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Thermal Properties of SiOC Glasses and Glass Ceramics at Elevated Temperatures. (deposited 20 Nov 2023 15:08)
- Thermal Properties of SiOC Glasses and Glass Ceramics at Elevated Temperatures. (deposited 13 Apr 2018 11:42) [Gegenwärtig angezeigt]
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