| Autor: |
Guenot, Ph., Champagnon, B., Parc, R. Le |
| Předmět: |
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| Zdroj: |
Philosophical Magazine B; 1/15/2002, Vol. 82 Issue 2, p251-255, 5p, 1 Diagram, 1 Chart, 2 Graphs |
| Abstrakt: |
In a pure silica glass, different fictive temperatures are achieved between 1500 and 1100°C. These temperatures are checked by the position of the Si - O - Si Raman band. Light scattering for the different samples due to density fluctuations is determined by the Landau-Placzek ratio which decreases when T[sub f] decreases. Further relaxation occurs in this glass 300°C below T[sub g]; it is interpreted in correlation with the subrelaxational process induced by the diffusion of a few parts per million of impurities. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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