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)
Article
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2003 |
| Creators: | Lichtenberger, O. ; Pippel, E. ; Woltersdorf, J. ; Riedel, Ralf |
| Type of entry: | Bibliographie |
| Title: | Formation of nanocrystalline titanium carbonitride by pyrolysis of poly(titanylcarbodiimide) |
| Language: | English |
| Date: | 20 July 2003 |
| Publisher: | Elsevier |
| Journal or Publication Title: | Materials chemistry and physics |
| Volume of the journal: | 81 |
| Issue Number: | 1 |
| 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. |
| Uncontrolled Keywords: | Organometallic precursors, Preceramic polymers, Titanium carbonitride, High-resolution electron microscopy, Electron energy-loss spectroscopy, Energy-loss near-edge structure |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids |
| Date Deposited: | 20 Nov 2008 08:16 |
| Last Modified: | 20 Feb 2020 13:25 |
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