Theoretical model of rare earth ions doping amount in high silica luminescence glass

To obtain the quantitative doping amount of rare earth ions in high silica glass, the RE ions diffusing into pores and adsorbed on the surface of pores by ion-exchange were both considered and the theoretical model of the doping amount was established. The results show that the adsorption quantity of ion-exchange is only about one-tenth of diffusion fluxes. So to improve the doping amount of RE ions in high silica glass, increasing the doping solution concentration is the easiest way and increasing the specific surface area of porous glass is not an efficient method. The absorbance of sintered porous glasses with the different content of Ce3+ and Sm3+ were measured to prove the calculation results of doping amount, qualitatively. The results indicated that the absorbance of different samples grows in line with the doping amount trend.