Abstract: The photoelectron spectra of Ois, Sip,Ti₂, of non-crystal TiO₂-SiO₂with various TiO₂contents were obtained by ESCA. The relationship between their chemical shifts and the network defects, the titanium coordination structure was discussed. With increasing the content of TiO₂up to about 7wt%, the quantity of the defects tends to saturation and the number of the Ti atoms in substitution state increases, comparing with that mainly in interstitial state at lower content of TiO₂.

Key words: ESCA, Non-crystal state, TiO₂-SiO₂