Ionescu, E. ; Terzioglu, C. ; Linck, C. ; Kaspar, J. ; Navrotsky, A. ; Riedel, R. ; Gauckler, L. (2013)
Thermodynamic Control of Phase Composition and Crystallization of Metal-Modified Silicon Oxycarbides.
In: Journal of the American Ceramic Society, 96 (6)
doi: 10.1111/jace.12327
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Silicon oxycarbides modified with main group or transition metals (SiMOC) are usually synthesized via pyrolysis of sol-gel precursors from suitable metal-modified orthosilicates or polysiloxanes. In this study, the phase composition of different SiMOC systems (M = Sn, Fe, Mn, V, and Lu) was investigated. Depending on the metal, different ceramic phases formed. For M = Mn and Lu, MOx/SiOC ceramic nanocomposites were formed, whereas other compositions revealed the formation of M/SiOC (M = Sn), MSix/SiOC (M = Fe) or MCx/SiOC (M = V) upon pyrolysis. The different phase compositions of the SiMOC materials are rationalized by a simple thermodynamic approach which generally correctly predicts which type of ceramic nanocomposite is expected upon ceramization of the metal-modified precursors. Calculations show that the thermodynamic stability of the MOx phase with respect to that of the C–O system is the most important factor to predict phase formation in polymer-derived SiMOC ceramic systems. A secondary factor is the relative stability of metal oxides, silicates, carbides, and silicides.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2013 |
| Autor(en): | Ionescu, E. ; Terzioglu, C. ; Linck, C. ; Kaspar, J. ; Navrotsky, A. ; Riedel, R. ; Gauckler, L. |
| Art des Eintrags: | Bibliographie |
| Titel: | Thermodynamic Control of Phase Composition and Crystallization of Metal-Modified Silicon Oxycarbides |
| Sprache: | Englisch |
| Publikationsjahr: | Juni 2013 |
| Verlag: | Wiley-VCH Verlag GmbH & Co. KGaA |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 96 |
| (Heft-)Nummer: | 6 |
| DOI: | 10.1111/jace.12327 |
| Kurzbeschreibung (Abstract): | Silicon oxycarbides modified with main group or transition metals (SiMOC) are usually synthesized via pyrolysis of sol-gel precursors from suitable metal-modified orthosilicates or polysiloxanes. In this study, the phase composition of different SiMOC systems (M = Sn, Fe, Mn, V, and Lu) was investigated. Depending on the metal, different ceramic phases formed. For M = Mn and Lu, MOx/SiOC ceramic nanocomposites were formed, whereas other compositions revealed the formation of M/SiOC (M = Sn), MSix/SiOC (M = Fe) or MCx/SiOC (M = V) upon pyrolysis. The different phase compositions of the SiMOC materials are rationalized by a simple thermodynamic approach which generally correctly predicts which type of ceramic nanocomposite is expected upon ceramization of the metal-modified precursors. Calculations show that the thermodynamic stability of the MOx phase with respect to that of the C–O system is the most important factor to predict phase formation in polymer-derived SiMOC ceramic systems. A secondary factor is the relative stability of metal oxides, silicates, carbides, and silicides. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 19 Feb 2014 13:15 |
| Letzte Änderung: | 19 Feb 2014 13:15 |
| PPN: | |
| Sponsoren: | Funded by German Research Foundation. Grant Numbers: IO-64/1, IO-64/3., Funded by Materials World Network. Grant Number: NSF MWN-0906070. |
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