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Abstracts
The size of nanopores in thermally treated samples of silica aerogels was determined by ortho-positronium lifetime measurements at room temperature. The annealing of samples in the temperature region of 300-800°C does not make substantial changes in pore size felt by positronium. The annealing at higher temperatures from an interval of 800-1050°C causes shrinkage of the samples reducing the pore size to 1-15 nm. The macropores vanish at temperature treatment at 1000°C and the positron annihilation is not affected by oxygen from air.
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Journal
Year
Volume
Issue
Pages
1517-1522
Physical description
Dates
published
2008-05
received
2007-09-03
Contributors
author
- Institute of Physics of SAS, Dúbravská cesta 9, 854 11 Bratislava, Slovakia
author
- Institute of Physics of SAS, Dúbravská cesta 9, 854 11 Bratislava, Slovakia
author
- Institute of Physics of SAS, Dúbravská cesta 9, 854 11 Bratislava, Slovakia
author
- Institute of Physics of SAS, Dúbravská cesta 9, 854 11 Bratislava, Slovakia
author
- Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská Dolina CH-2, 842 15 Bratislava, Slovakia
author
- Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynská Dolina CH-2, 842 15 Bratislava, Slovakia
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv113n533kz