Preparation and Characterization of Tb~(3+)/Eu~(3+) Co-Doped Na_2O-Al_2O_3-SiO_2 Glass Ceramics

摘要

Tb~(3+)/Eu~(3+) co-doped sodium nepheline transparent glass ceramics with the weight percentage composition of 27Na_2O-19Al_2O_3-23SiO_2-13H_3BO_3-6TiO_2-6ZrO_2-3Tb_4O_7-3Eu_2O_3 were prepared by melting crystallization method. The heat treatment system, crystal phase, micromorphology, transmittance and luminescent properties of the samples were tested and characterized by DSC, XRD, SEM, UV-Vis-NIR and fluorescence spectrometer, respectively. The results show that the optimum heat treatment condition of glass at 480癈 nucleated lh and 580癈 grew lh., the crystal phase was NaAlSiO_4(35-0424), and the incorporation of rare earth ions did not affect the crystal phase. The transmittance of glass ceramics in the visible area can reach 78%. The effect of different Tb~(3+)/Eu~(3+) doping concentration on the luminescent properties of glass ceramic samples was discussed. It was found that there was a phenomenon of Tb~(3+) to Eu~(3+) energy transfer, and the luminescence effect was best when the percentage of mass of Tb~(3+)/Eu~(3+) was 1:1.