Li, Wenjie ; Li, Duan ; Gurlo, Aleksander ; Shen, Zhijian ; Riedel, Ralf ; Ionescu, Emanuel (2015)
Synthesis and rapid sintering of dense SrA(O,N)3 (A=Mo, W) oxynitride ceramics.
In: Journal of the European Ceramic Society, 35 (12)
doi: 10.1016/j.jeurceramsoc.2014.12.014
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
SrMo(O,N)3 and SrW(O,N)3 oxynitride powders were synthesized via a solvothermal route followed by ammonolysis. Their rapid densification by spark plasma sintering with a heating rate of 300–400 °C/min under a uniaxial pressure of 100 MPa yielded dense monoliths. The lowest open porosity achieved was 0 vol% for SrMo(O,N)3 and 7.6 vol% for SrW(O,N)3. The compacted monoliths were characterized by elemental analysis, electron microscopy (SEM, TEM) coupled with energy dispersive X-ray spectroscopy (EDX), as well as X-ray diffraction (XRD). Rietveld refinement of the XRD patterns revealed in the case of the compacted SrMo(O,N)3 the formation of small amount of ternary oxides (Sr3Mo2O7/SrMoO4/Sr3MoO6), molybdenum nitride (Mo2N), as well as metallic Mo. On the contrary, SrW(O,N)3 exhibited significant decomposition after consolidation, with SrWO4/Sr3WO6 being main components beside SrMo(O,N)3, accompanied by tungsten nitride (WN) and metallic W. Thus, rapid SPS enables the densification of oxynitrides with high density and acceptable purity that were hardly achieved earlier.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Li, Wenjie ; Li, Duan ; Gurlo, Aleksander ; Shen, Zhijian ; Riedel, Ralf ; Ionescu, Emanuel |
| Art des Eintrags: | Bibliographie |
| Titel: | Synthesis and rapid sintering of dense SrA(O,N)3 (A=Mo, W) oxynitride ceramics |
| Sprache: | Englisch |
| Publikationsjahr: | Oktober 2015 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 35 |
| (Heft-)Nummer: | 12 |
| DOI: | 10.1016/j.jeurceramsoc.2014.12.014 |
| Kurzbeschreibung (Abstract): | SrMo(O,N)3 and SrW(O,N)3 oxynitride powders were synthesized via a solvothermal route followed by ammonolysis. Their rapid densification by spark plasma sintering with a heating rate of 300–400 °C/min under a uniaxial pressure of 100 MPa yielded dense monoliths. The lowest open porosity achieved was 0 vol% for SrMo(O,N)3 and 7.6 vol% for SrW(O,N)3. The compacted monoliths were characterized by elemental analysis, electron microscopy (SEM, TEM) coupled with energy dispersive X-ray spectroscopy (EDX), as well as X-ray diffraction (XRD). Rietveld refinement of the XRD patterns revealed in the case of the compacted SrMo(O,N)3 the formation of small amount of ternary oxides (Sr3Mo2O7/SrMoO4/Sr3MoO6), molybdenum nitride (Mo2N), as well as metallic Mo. On the contrary, SrW(O,N)3 exhibited significant decomposition after consolidation, with SrWO4/Sr3WO6 being main components beside SrMo(O,N)3, accompanied by tungsten nitride (WN) and metallic W. Thus, rapid SPS enables the densification of oxynitrides with high density and acceptable purity that were hardly achieved earlier. |
| Freie Schlagworte: | Perovskite, Oxynitride, Spark plasma sintering, Densification, Microstructure |
| Zusätzliche Informationen: | 8th International Symposium on Nitrides in Conjunction with the 7th International Workshop on Spinel Nitrides and Related Materials and the Annual Meeting of the Marie Curie ITN 7th Framework Programme FUNEA |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 22 Jun 2015 10:57 |
| Letzte Änderung: | 22 Jun 2015 10:57 |
| PPN: | |
| Sponsoren: | Financial support of this work by European Commission through the Marie-Curie ITN project “Functional Nitrides for Energy Applications, FUNEA” (FP7-PITN-GA-2010-264873) is gratefully acknowledged. |
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