Effect of mental oxide on the structure and property of rare earth doped glass

Abstract

Glass fiber reinforced concrete (GFRC) is a very widely used material. However, the highly alkaline environment in concrete will erode and destroy the glass fiber therein, so it is particularly important to improve the corrosion resistance of glass. In this study, ZrO2 and TiO2 were introduced into the La2O3-CaO-Al2O3-P2O5 system glass and their effects on the structure and properties of the glass were systematically studied. The results show that the introduction of ZrO2 and TiO2 has a similar effect on rare earth doped glass. For one thing, it will increase the density of the glass and make the structure of the glass dense. For another, it can improve the water resistance and alkali corrosion resistance of the glass. SEM images showed that after the glass was immersed in the alkali solution, a protective CaO film was formed on the surface of the glass sample. As the etching time increases, the protective film on the glass surface peels off in a sheet shape, and the skeleton of the glass peels off in a lump shape.