Microstructure and photoluminescent properties of MgO–Al2O3–SiO2 silicate glass-ceramics doped with Eu3+ and Dy3+

Abstract

The Eu3+/Dy3+-activated 5MgO–5Al2O3–90SiO2 (5MA–90S)/10MgO–10Al2O3–80SiO2 (10MA–80S) glass and glass-ceramics were prepared by the sol–gel method. The prepared 5MA–90S:Eu3+/Dy3+/10MA–80S:Eu3+/Dy3+ samples were characterized by the X-ray diffraction, high-resolution transmission electron microscopy, and photoluminescent spectra. After annealing at temperatures ≤900 °C, amorphous glass state was obtained. The higher the heating temperature (≥900 °C), the MgAl2O4 nanocrystals were formed. The luminescent behaviors of 5MA–90S:Eu3+/Dy3+/10MA–80S:Eu3+/Dy3+ glass and glass-ceramics with different heat treatment temperatures under λ ex = 351, 395 nm are studied. It is important and interesting that the color can be tuned through altering the composition and the heat temperature. The Eu3+/Dy3+-activated MgO–Al2O3–SiO2 glass and glass-ceramics were prepared by the sol–gel method. The prepared 5MgO–5Al2O3–90SiO2/10MgO–10Al2O3–80SiO2 glass and glass-ceramics were characterized by the X-ray diffraction, high-resolution transmission electron microscopy, and photoluminescent spectra. The luminescent behaviors of Eu3+-doped, Dy3+-doped, and Eu3+/Dy3+-co-doped 5MgO–5Al2O3–90SiO2/10MgO–10Al2O3–80SiO2 with different heat treatment temperatures and composition under λ ex = 351, 395 nm are studied.