Effect of P2O5 addition on the structural and spectroscopic properties of sodium aluminosilicate glass

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2012,（7）
• 页码范围: 58-61
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201210.071602

摘要

The structural and spectroscopic properties of Na2O-Al2O3-SiO2-xP2O5 glasses (x =0 to 7 mol％) are investigated.Both Raman and IR spectra reveal that discrete phosphate species ([PO4]-3,[PO3O1/2]-2)with low polymerization degree can be formed in the silicate glass.These phosphate structures scavenge non-bridging oxygen ions and cations from the silicate network,resulting in an increase of the glass transition temperature.According to the Judd-Ofelt intensity parameters (Ω2,Ω4,Ω6) of Er3+,the asymmetry of local environment around Er3+ becomes higher,and the bond covalency between Era+ and O2-decreases after P2O5 is introduced.In the emission spectra,photoluminescence intensity increases with increasing P2O5 concentration and the spectra are inhomogeneously broadened,revealing that the ligand electric field around Era+ is dramatically changed,and the glass matrix becomes disordered.