Investigation of the structure of nanocrystalline refractory oxides by X-ray diffraction, electron microscopy, and atomic force microscopy
| Autor: | S. V. Medichenko, Tetyana Konstantinova, Tatyana A. Kuznetsova, Yu. G. Zonov, V. A. Glazunova, T. M. Ul’yanova, L. V. Titova, A. S. Doroshkevich |
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| Rok vydání: | 2006 |
| Předmět: |
Aluminium oxides
Materials science Scanning electron microscope Refractory metals Analytical chemistry Nanoparticle General Chemistry Condensed Matter Physics Nanocrystalline material law.invention Crystallography law Transmission electron microscopy Microscopy General Materials Science Electron microscope |
| Zdroj: | Crystallography Reports. 51:S144-S149 |
| ISSN: | 1562-689X 1063-7745 |
| DOI: | 10.1134/s1063774506070212 |
| Popis: | The structures of nanocrystalline fibrous powders of refractory oxides have been investigated by different methods: determination of coherent-scattering regions, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic-force microscopy (AFM). The sizes of nanograins of different crystalline phases of refractory metal oxides have been determined during the formation of these nanograins and the dynamics of their growth during heat treatment in the temperature range 600–1600°C has been studied. The data on the structure of nanocrystalline refractory oxide powders, obtained by different methods, are in good agreement. According to the data on coherent-scattering regions, the sizes of the ZrO2 (Y2O3) and Al2O3 grains formed are in the range 4–6 nm, and the particle sizes determined according to the TEM and AFM data are in the ranges 5–7 and 2–10 nm, respectively. SEM analysis made it possible to investigate the dynamics of nanoparticle growth at temperatures above 1000°C and establish the limiting temperatures of their consolidation in fibers. |
| Databáze: | OpenAIRE |
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