König, Markus ; Höhn, Sören ; Hoffmann, Rudolf ; Suffner, Jens ; Lauterbach, Stefan ; Weiler, Ludwig ; Guillon, Olivier ; Rödel, Jürgen (2010)
Sintering of hierarchically structured ZnO.
In: Journal of Materials Research, 25 (11)
doi: 10.1557/JMR.2010.0288
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Hierarchically structured zinc oxide was prepared from zinc acetylacetonate by a microwave-assisted process. The zinc oxide formed nanoparticles that are packed in substructured spherical agglomerates with a diameter of 0.5 μm. Nitrogen adsorption, x-ray diffraction, and dilatometry were used to investigate the densification. Ion beam method was applied to prepare cross sections and enable microstructural analysis. Three regimes of microstructural evolution were identified on different scales during sintering. In the first regime, nanoparticles changed morphology and densification occurred only in the interiors of the agglomerates. In the second regime, agglomerates became hollow and built necks. Simultaneously, densification set in on the macroscopic scale. A drastic homogenization of the microstructure was observed that marked the beginning of the third regime, where densification and grain growth occurred.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2010 |
| Autor(en): | König, Markus ; Höhn, Sören ; Hoffmann, Rudolf ; Suffner, Jens ; Lauterbach, Stefan ; Weiler, Ludwig ; Guillon, Olivier ; Rödel, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Sintering of hierarchically structured ZnO |
| Sprache: | Englisch |
| Publikationsjahr: | November 2010 |
| Verlag: | Cambridge University Press |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Materials Research |
| Jahrgang/Volume einer Zeitschrift: | 25 |
| (Heft-)Nummer: | 11 |
| DOI: | 10.1557/JMR.2010.0288 |
| Kurzbeschreibung (Abstract): | Hierarchically structured zinc oxide was prepared from zinc acetylacetonate by a microwave-assisted process. The zinc oxide formed nanoparticles that are packed in substructured spherical agglomerates with a diameter of 0.5 μm. Nitrogen adsorption, x-ray diffraction, and dilatometry were used to investigate the densification. Ion beam method was applied to prepare cross sections and enable microstructural analysis. Three regimes of microstructural evolution were identified on different scales during sintering. In the first regime, nanoparticles changed morphology and densification occurred only in the interiors of the agglomerates. In the second regime, agglomerates became hollow and built necks. Simultaneously, densification set in on the macroscopic scale. A drastic homogenization of the microstructure was observed that marked the beginning of the third regime, where densification and grain growth occurred. |
| Freie Schlagworte: | Densification; Microstructure; Nanoscale |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Geomaterialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 14 Jun 2011 12:09 |
| Letzte Änderung: | 05 Mär 2013 09:48 |
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