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- Title
Structure of amorphous alumina tubes studied by positron annihilation lifetime spectroscopy.
- Authors
Shantarovich, V.; Kevdina, I.; Miron, N.; Baronova, Yu.; Berdonosov, S.; Baronov, S.; Melikhov, I.
- Abstract
Positron annihilation lifetime spectroscopy (PALS) is used to investigate the detailed structure of amorphous alumina tubes prepared via thermohydrolysis of anhydrous AlCl3 . The results demonstrate that PALS is a sensitive probe of the structure of amorphous materials, capable of distinguishing between the structures of amorphous alumina tubes and amorphous alumina prepared by a standard procedure, which are shown to differ slightly in the concentration and size of free-volume elements. The observed distinctions can be understood in terms of the anisotropic aggregation of primary alumina particles during hydrolysis in aqueous media or thermohydrolysis in water vapor.
- Subjects
AMORPHOUS substances; POSITRON annihilation; SPECTRUM analysis; HYDROLYSIS; ALUMINUM oxide; WATER vapor transport
- Publication
Inorganic Materials, 2005, Vol 41, Issue 3, p255
- ISSN
0020-1685
- Publication type
Article
- DOI
10.1007/s10789-005-0119-8