High resolution X-ray Photoelectron Spectroscopy (XPS) study of K2O–SiO2 glasses: Evidence for three types of O and at least two types of Si

Structural variations of bioactive glasses obtained by different synthesis routes

“…Therefore, peaks centered at 102.2 eV (minor) and 103.5 eV (major) for A2_gel glass can be attributed to Q 3 and Q 4 Si entities, respectively. The spectrum of A2_melt glass reveals peaks at 101.2 eV (major) and 102.5 eV (minor) which can be assigned to Q 2 and Q 3 Si species, respectively [64]. These results are consistent with NMR studies confirming a higher degree of polymerization of the gel-derived A2 glass.…”

Modification of niobium surfaces using plasma electrolytic oxidation in silicate solutions

“…Additionally, the Si 2p core excitation (Fig. 8) shows two components assigned to silicate (A) and crystalline silica (B) where component B predominates [52][53][54][55]. In the XPS technique, most of the intensity, i.e.…”

“Free” oxide ions in silicate melts: Thermodynamic considerations and probable effects of temperature

“…Recent oxygen 1s XPS studies of alkali and lead silicate glasses (Nesbitt et al, 2011;Nesbitt and Dalby, 2007;Sawyer et al, 2015;Sawyer et al, 2012) have suggested that FO concentrations in some silicate glass compositions, including alkali silicates with 50 to 70 mol % SiO 2 , are much higher than expected by this "conventional wisdom". Several recent 17 O NMR…”