Sarkar, Abhishek ; Djenadic, Ruzica ; Usharani, Nandhini J. ; Sanghvi, Kevin P. ; Chakravadhanula, Venkata S. K. ; Gandhi, Ashutosh S. ; Hahn, Horst ; Bhattacharya, Subramshu S. (2017)
Nanocrystalline multicomponent entropy stabilised transition metal oxides.
In: Journal of the European Ceramic Society, 37 (2)
doi: 10.1016/j.jeurceramsoc.2016.09.018
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Multicomponent entropy stabilised oxides containing four and five metal elements in equiatomic amounts were successfully synthesised in nanocrystalline form by nebulised spray pyrolysis (NSP), flame spray pyrolysis (FSP) and reverse co-precipitation (RCP) techniques, demonstrating that entropy stabilisation of these recently discovered materials is independent of the synthesis method. Both 4- and 5-cationic systems, (Co,Mg,Ni,Zn)O and (Co,Cu,Mg,Ni,Zn)O, can be stabilised into a single rocksalt structure directly only using NSP, while in FSP and RCP, stabilisation can be achieved after thermal treatment. This result indicates, that in 5-cationic NSP system configurational entropy is high enough to directly stabilise single rocksalt phase at lower temperature, while higher synthesis temperature is required to compensate the lower configurational entropy in 4-cationic system. Retention of single-phase at room temperature indicates sluggish diffusion kinetics, making entropy stabilised phases quenchable. (C) 2016 Elsevier Ltd. All rights reserved.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Sarkar, Abhishek ; Djenadic, Ruzica ; Usharani, Nandhini J. ; Sanghvi, Kevin P. ; Chakravadhanula, Venkata S. K. ; Gandhi, Ashutosh S. ; Hahn, Horst ; Bhattacharya, Subramshu S. |
| Art des Eintrags: | Bibliographie |
| Titel: | Nanocrystalline multicomponent entropy stabilised transition metal oxides |
| Sprache: | Englisch |
| Publikationsjahr: | Februar 2017 |
| Verlag: | Elsevier Science Ltd. |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 37 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.1016/j.jeurceramsoc.2016.09.018 |
| Kurzbeschreibung (Abstract): | Multicomponent entropy stabilised oxides containing four and five metal elements in equiatomic amounts were successfully synthesised in nanocrystalline form by nebulised spray pyrolysis (NSP), flame spray pyrolysis (FSP) and reverse co-precipitation (RCP) techniques, demonstrating that entropy stabilisation of these recently discovered materials is independent of the synthesis method. Both 4- and 5-cationic systems, (Co,Mg,Ni,Zn)O and (Co,Cu,Mg,Ni,Zn)O, can be stabilised into a single rocksalt structure directly only using NSP, while in FSP and RCP, stabilisation can be achieved after thermal treatment. This result indicates, that in 5-cationic NSP system configurational entropy is high enough to directly stabilise single rocksalt phase at lower temperature, while higher synthesis temperature is required to compensate the lower configurational entropy in 4-cationic system. Retention of single-phase at room temperature indicates sluggish diffusion kinetics, making entropy stabilised phases quenchable. (C) 2016 Elsevier Ltd. All rights reserved. |
| Freie Schlagworte: | Spray pyrolysis, Reverse co-precipitation, Structural properties, Entropy Stabilisation, Nanocrystalline |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien |
| Hinterlegungsdatum: | 27 Jul 2017 08:58 |
| Letzte Änderung: | 19 Nov 2021 11:22 |
| PPN: | |
| Sponsoren: | The authors would like to thank the Helmholtz Association (Germany) for financial support through the Helmholtz Portfolio Project "Electrochemical Storage in System - Reliability and Integration", Karlsruhe Nano Micro Facility (KNMF, Germany)., A. Sarkar acknowledges support of DAAD IIT/Master sandwich program 2015-16. |
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