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  Magnéli phases Ti4O7 and Ti8O15 and their carbon nanocomposites via the thermal decomposition-precursor route

Conze, S., Veremchuk, I., Reibold, M., Matthey, B., Michaelis, A., Grin, Y., et al. (2015). Magnéli phases Ti4O7 and Ti8O15 and their carbon nanocomposites via the thermal decomposition-precursor route. Journal of Solid State Chemistry, 229, 235-242. doi:10.1016/j.jssc.2015.04.037.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-52A8-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-EEFA-A
Genre: Journal Article

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 Creators:
Conze, S.1, Author
Veremchuk, I.2, Author              
Reibold, M.1, Author
Matthey, B.1, Author
Michaelis, A.1, Author
Grin, Yu.3, Author              
Kinski, I.1, Author
Affiliations:
1external, ou_persistent22              
2Igor Veremchuk, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863411              
3Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863413              

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 Abstract: A new synthetic approach for producing nano-powders of the Magneli phases Ti4O7, Ti8O15 and their carbon nanocomposites by thermal decomposition-precursor route is proposed. The formation mechanism of the single-phase carbon nanocomposites (Ti4O7/C and Ti8O15/C) from metal-organic precursors is studied using FT-IR, elemental analysis, TG, STA-MS and others. The synthesis parameters and conditions were optimized to prepare the target oxides with the desired microstructure and physical properties. The electrical and transport properties of Ti4O7/C and Ti8O15/C are investigated. These nano-materials are n-type semiconductors with relatively low thermal conductivity in contrast to the bulk species. The nanostructured carbon nanocomposites of Magneli phases achieve a low thermal conductivity close to 1 W/m K at RT. The maximum ZT(570) (degrees C) values are 0.04 for Ti4O7/C powder nanocomposite and 0.01 for Ti8O15/C bulk nanocomposite. (C) 2015 Elsevier Inc. All rights reserved.

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Language(s): eng - English
 Dates: 2015-05-122015-09-01
 Publication Status: Published in print
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Title: Journal of Solid State Chemistry
Source Genre: Journal
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Publ. Info: Orlando, Fla. : Academic Press
Pages: - Volume / Issue: 229 Sequence Number: - Start / End Page: 235 - 242 Identifier: ISSN: 0022-4596
CoNE: /journals/resource/954922646045