The role of Gd2O3 and Y2O3 in corrosion of soda lime silicate glass

Corrosion of soda-lime-silicate glasses containing Gd and Y has been carried out by solution and solid analyses, to investigate the effect of Gd and Y on the chemical durability of silicate glass. The results showed that the incorporation of Gd and Y into silicate glass decreases glass constituent releases and increases chemical durability. The morphology of glass surface and thickness of altered layer were observed that the degree of corroding of the soda lime silicate glass doped with Gd and Y was significantly less than that of the base glass. EDS microanalyses revealed that the effect of Gd and Y on the altered layer is different, the non-congruent dissolution process is observed in the case of Gd doped glasses. Besides, the improving effect of Gd and Y on acid and alkaline resistance of silicate glasses can attribute to their larger ionic radius and higher cation field strength.