Lichtenberger, O. ; Pippel, E. ; Woltersdorf, J. ; Riedel, Ralf (2003)
Formation of nanocrystalline titanium carbonitride by pyrolysis of poly(titanylcarbodiimide).
In: Materials chemistry and physics, 81 (1)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The chemical formation of advanced ceramics from organometallic precursors is promising with respect to structural design and tailormade properties. We report on the synthesis of nanocrystalline titanium carbonitride materials at different pyrolysis temperatures via the polymer-to-ceramic transformation of synthesised poly(titanylcarbodiimides) and their structural and nanochemical characterization using high-resolution and analytical electron microscopy, in combination with quantummechanical calculations. Pyrolysis at 800 °C leads to a mixture of amorphous carbon and titanium nitride as crystalline particles of about 4 nm in size. Pyrolysis at 1100 °C yields titanium carbonitride as crystalline particles of 20–30 nm in size. The identification of all phases was possible by the analysis of the measured energy-loss near-edge spectra of their C–K and N–K edges, and comparison with measured standards and with simulated fine structures using calculations based on the density functional theory.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2003 |
| Autor(en): | Lichtenberger, O. ; Pippel, E. ; Woltersdorf, J. ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | Formation of nanocrystalline titanium carbonitride by pyrolysis of poly(titanylcarbodiimide) |
| Sprache: | Englisch |
| Publikationsjahr: | 20 Juli 2003 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Materials chemistry and physics |
| Jahrgang/Volume einer Zeitschrift: | 81 |
| (Heft-)Nummer: | 1 |
| Kurzbeschreibung (Abstract): | The chemical formation of advanced ceramics from organometallic precursors is promising with respect to structural design and tailormade properties. We report on the synthesis of nanocrystalline titanium carbonitride materials at different pyrolysis temperatures via the polymer-to-ceramic transformation of synthesised poly(titanylcarbodiimides) and their structural and nanochemical characterization using high-resolution and analytical electron microscopy, in combination with quantummechanical calculations. Pyrolysis at 800 °C leads to a mixture of amorphous carbon and titanium nitride as crystalline particles of about 4 nm in size. Pyrolysis at 1100 °C yields titanium carbonitride as crystalline particles of 20–30 nm in size. The identification of all phases was possible by the analysis of the measured energy-loss near-edge spectra of their C–K and N–K edges, and comparison with measured standards and with simulated fine structures using calculations based on the density functional theory. |
| Freie Schlagworte: | Organometallic precursors, Preceramic polymers, Titanium carbonitride, High-resolution electron microscopy, Electron energy-loss spectroscopy, Energy-loss near-edge structure |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 20 Nov 2008 08:16 |
| Letzte Änderung: | 20 Feb 2020 13:25 |
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