2002 年 42 巻 4 号 p. 352-358
The chemical state of fluorine and the effect of fluorine addition on the degree of polymerization of silicate network have been investigated for the CaO-SiO2-CaF2 and CaO-SiO2-CaF2-FeOx glasses using the X-ray photoelectron spectroscopy (XPS) and Mössbauer spectroscopy measurements. The F1s XPS spectra indicate that the fluorine is dominantly coordinated with calcium rather than silicon. The O1s XPS spectra for the CaO-SiO2-CaF2 glasses and the values of Fe2+/Fe3+ obtained by Mössbauer spectra for the CaO-SiO2-CaF2-FeOx glasses indicate that CaF2 addition does not depolymerize the silicate network for both systems.
