Autor: Dawidowicz, B. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Crystallization Process in Porous and Nonporous Vycor Glass
Autorzy:: Jasińska, B.
Dawidowicz, A. L.
Pikus, S.
Powiązania:: https://bibliotekanauki.pl/articles/2042215.pdf
Data publikacji:: 2005-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.70.Bj
Opis:: Three stages of thermal and chemical processing of Vycor glass were carried out. Raw material, the glass with small and big pores was studied. In each stage of study various crystallinity degrees of investigated material were obtained. The relation between crystallinity degree and the intensity of o-Ps components was determined. In nonporous material a high correlation between o-Ps intensity and crystallinity degree was found. In porous material the decrease in total o-Ps intensity can be a measure of the crystallinity degree.
Źródło:: Acta Physica Polonica A; 2005, 107, 5; 724-728
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Liquation of Vycor Glasses - Study by Positron Annihilation Lifetime Method
Autorzy:: Jasińska, B.
Dawidowicz, A. L.
Radkiewicz, S.
Powiązania:: https://bibliotekanauki.pl/articles/2024266.pdf
Data publikacji:: 2001
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.70.Bj
61.43.Gt
Opis:: Two Vycor glasses of different percentages of the components were liquated between 725 K and 950 K and leached in order to produce pores. Little intermolecular voids characterized by ortho-positronium lifetime valueτ$\text{}_{2}$≈1.5 ns were observed simultaneously. At the first stage of pore formation the intensity I$\text{}_{2}$ decreased considerably for both glasses, while at liquation temperatures higher than 825 K it increased again. The increase in I$\text{}_{2}$ resulted from changes in the properties of the bulk material. The growth ofτ$\text{}_{2}$ in this range of temperatures was also observed.
Źródło:: Acta Physica Polonica A; 2001, 99, 3-4; 379-384
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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