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Positron lifetimes at the initial stage of pore formation in Vycor glass |
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| Authors: | B. Jasiska A. L. Dawidowicz T. Goworek |
| Affiliation: | a Institute of Physics, Maria Curie Sklodowska University, 20-031, Lublin, Poland b Department of Chemical Physics, Faculty of Chemistry UMCS, 20-031, Lublin, Poland |
| Abstract: | The formation of narrow pores during leaching of Vycor glass by sulphuric acid was investigated using the positron lifetime technique. During the leaching process the pore diameter remained roughly constant (except for the case of cold leaching). The time of processing changed the total length of capillaries, but not their number; at the temperature 50°C during 20 min of leaching the average leaching depth was 24 μm. |
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