Abstract: The Iuminophors which have composition of 0. 701MgO- 0. 175CaO1. 25SiO₂:0. 06Eu³⁺,0. 002Bi³⁺ and doped Li^-ion as charge compensator were synthesized for the first time from Mg(NO₃)₂, Ca(NO₃)₂, Eu(NO₃)₃, LiNO₃ and Si(OC₂H₅)₄ via the sol-gel method at the temperature much lower than that by the traditional solid state reaction. The optimum conditions of preparation are reported. Both the transition from soI to gel and the transition process from geI to luminescent crystal were studied. The luminescence character of the luminophors excited by different wavelength light, as well as the luminescence behavior in different concentrations of the activators and sensitizers were explored. The energy transfer from Bi³⁺ to Eu³⁺ in the luminophors was also discussed.

Key words: bismuth, europium doped silicate, sol-gel method, preparation, luminophor, sensi-tization