Effect of CeO2 Doping on the Structure and Properties of Titanium Barium Silicate Glass

Resumo

Glasses with the composition 50SiO₂ · 20TiO₂ · 15BaO · 7.5SrO · 7.5CaO doped with the varied content of CeO₂ were prepared by conventional melt quenching technique. The effect of CeO₂ on the structure of glasses was investigated by X-ray photoelectron spectroscopy and Raman spectroscopy. The density, thermal stability, dielectric properties and acid resistance of glasses were studied by Archimedes method, differential thermal scanning analysis and X-ray diffraction, dielectric measuring as well as the powder method. The results showed that the coordination of Ti, which existed in glasses as [TiO₄], did not change. An increase in the content of non-bridging oxygen atoms and a corresponding decrease in the content of bridging oxygens correlated. The depolymerization of the glass network was attributed to an increase in the number of Si–O–Ti bonds and the change of the Qⁿ distribution. With an increase in the CeO₂ content, the thermal stability and acid resistance of glass first increased and then decreased, and the dielectric constant and dielectric loss of glass decreased first and then increased.