Luminescence property of Eu2+ in SiO2-Al2O3 glass phosphor

Manufacturing process for silicate glass phosphors containing Eu2+ activator and their photoluminescence property have been studied. We adopted powder sintering process instead of traditional glass melting process for making glass phosphor. At first, phosphor powders were synthesized at 1200 degrees C for 2-3 hours under a reducing atmosphere with 10% H-2-90% N-2 gas mixture. The reduced powders were compacted into discs and then the discs weresintered at 1400 similar to 1500 degrees C for 1 hr under a reducing atmosphere of 5H(2)-95% N-2. The enhancement of PL intensity by Al2O3 addition, XPS binding energy shift of Si 2p and O 1s, sintering shrinkage, and crystallization were characterized.