Abstract
A high density of nanovoids between 2 and 13 nm in size was produced during the crystallization process when amorphous Al2O3 and WO3, which are 20-30% lower in density than their crystalline phases, were annealed. By contrast, no formation or growth of nanovoids was observed during the crystallization of amorphous TiO2, which has a density 2% lower than its crystalline phase. These results suggest that large differences in density between amorphous and crystalline oxides can be utilized to produce nanoporous structures.
Original language | English |
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Pages (from-to) | 197-200 |
Number of pages | 4 |
Journal | Scripta Materialia |
Volume | 64 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2011 Jan |
Externally published | Yes |
Keywords
- Amorphous
- Crystallization
- Nanoporous
- Oxides
- TEM
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys