Showing papers by "Sumio Sakka published in 1976"

Studies on binary silicate glasses based on the SiKα and SiKß emission X-rays

Abstract: The SiKα and Kβ X-ray emission spectra of binary silicate glasses of the Li 2 O–SiO 2 , Na 2 O–SiO 2 , K 2 O–SiO 2 , Cs 2 O–SiO 2 , B 2 O 3 –SiO 2 , and GeO 2 –SiO 2 systems were measured with an X-ray fluorescence spectrometer to examine the chemical effects on the spectra. The SiKα peak wavelengths for all the glasses agreed with that for SiO 2 glass, which corresponded to the concept that the coordination number of Si shouldbe four in all the glasses examined in this study. The SiKβ peak wavelength decreased with increasing alkali content in the alkali silicate glasses, indicating that the Si–O bond weakend in average as the alkali oxide was added to SiO 2 glass. On the other hand, no drastic shift in the SiKβ peak wavelength was observed in the B 2 O 3 –SiO 2 and GeO 2 –SiO 2 systems, and this was interpreted as showing the constancy of Si–O bond strength in these glasses.