Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1500265 | Scripta Materialia | 2011 | 4 Pages |
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
R. Nakamura, T. Shudo, A. Hirata, M. Ishimaru, H. Nakajima,