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Structural and compositional variations in Ta3N5 produced by high-temperature ammonolysis of tantalum oxide

Henderson, Stuart J. and Hector, Andrew L. (2006) Structural and compositional variations in Ta3N5 produced by high-temperature ammonolysis of tantalum oxide Journal of Solid State Chemistry, 179, (11), pp. 3518-3524. (doi:10.1016/j.jssc.2006.07.021).

Record type: Article

Abstract

A series of samples of Ta3N5 (Cmcm, a = 3.89 Å, b = 10.22 Å, c = 10.28 Å) have been produced by high temperature ammonolysis of amorphous tantalum oxide under various temperature and heating time regimes. These were characterised by powder diffraction (x-ray and neutron), combustion microanalysis, thermogravimetric analysis and transmission electron microscopy. All samples were found to contain oxide in the 3-coordinate anion site and the b-axis length was sensitive to compositional variation. Samples heated for longer times at higher temperatures were anion deficient. The compositions of the samples have been related to their optical band gap UV-visible spectra. This work highlights the importance of careful compositional analysis when samples of nitride materials are produced for real-world applications.

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More information

Submitted date: 21 March 2006
Published date: November 2006
Keywords: tantalum nitride, non-stoichiometry, oxide, powder neutron diffraction, band gap

Identifiers

Local EPrints ID: 43290
URI: http://eprints.soton.ac.uk/id/eprint/43290
ISSN: 0022-4596
PURE UUID: 16a79055-9bb1-46da-a498-c900ed4ef913
ORCID for Andrew L. Hector: ORCID iD orcid.org/0000-0002-9964-2163

Catalogue record

Date deposited: 22 Jan 2007
Last modified: 17 Jul 2017 15:19

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Contributors

Author: Stuart J. Henderson

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