Irradiation induced densification and its correlation with three-membered rings in vitreous silica

0485967 - FZÚ 2018 RIV NL eng J - Článek v odborném periodiku
Gavenda, T. - Gedeon, O. - Jurek, Karel
Irradiation induced densification and its correlation with three-membered rings in vitreous silica.
Journal of Non-Crystalline Solids. Roč. 425, Oct (2015), s. 61-66. ISSN 0022-3093. E-ISSN 1873-4812
Grant CEP: GA ČR(CZ) GA15-12580S
Institucionální podpora: RVO:68378271
Klíčová slova: silica glass * electron irradiation * densification * Raman spectroscopy * glass topology * three-membered rings
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.825, rok: 2015

Suprasil silica glass was irradiated by 50 keV electron beam with doses within the range of 3.1–191.1 kC/m2. Volume changes induced by electron irradiation were monitored by means of Atomic Force Microscopy (AFM). Raman spectra were taken from irradiated spots to observe structural changes. Irradiated glasses were annealed at temperatures 500–1000 °C. After annealing irradiated spots were again examined by AFM and Raman spectroscopy in order to observe volume and structural relaxation of radiation-induced changes. Electron beam caused volume compaction that was correlated with D2 peak area for lower doses. D2 peak evolution under irradiation and subsequent annealing showed that topological changes in glass structure are possible deeply below the glass transition temperature.
Trvalý link: http://hdl.handle.net/11104/0280877