Irradiation of potassium-silicate glass surfaces: XPS and REELS study

0470950 - FZÚ 2017 RIV GB eng J - Článek v odborném periodiku
Romanyuk, Olexandr - Jiříček, Petr - Zemek, Josef - Houdková, Jana - Jurek, Karel - Gedeon, O.
Irradiation of potassium-silicate glass surfaces: XPS and REELS study.
Surface and Interface Analysis. Roč. 48, č. 7 (2016), s. 543-546. ISSN 0142-2421. E-ISSN 1096-9918.
[16th European Conference on Applications of Surface and Interface Analysis (ECASIA). Granada, 28.09.2015-01.10.2015]
Grant CEP: GA ČR(CZ) GA15-12580S
Institucionální podpora: RVO:68378271
Klíčová slova: electron spectroscopy * potassium silicate glass * x-ray irradiation * electron irradiation
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.132, rok: 2016

The surface composition and chemical structure of potassium-silicate glass (K2O-SiO2) with 15m% K2O and vitreous silica glasses (SiO2) were studied. Freshly fractured glass surfaces were irradiated by X-ray AlK radiation (1486.6eV) and an electron beam (2000eV) with various doses. As a consequence of photon irradiation, analyzed glass surfaces were enriched by potassium and the ratio of non-bridging (NBO) to bridging oxygen (BO) increased with exposure dose. Optical properties of glass surfaces were studied by reflection electron energy loss spectroscopy (REELS). Electron irradiation induced changes in the loss spectra of the K2O-SiO2 glass. Refractive indexes of the non-irradiated and irradiated K2O-SiO2 glass were derived. Changes in refractive index were related with potassium ions migration in the irradiated region.
Trvalý link: http://hdl.handle.net/11104/0268462