Effect of P2O5 addition on the structural and spectroscopic properties of sodium aluminosilicate glass |
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| Institution: | Jia Ding(1,2*),Youkuo Chen1,Wei Chen1,Lili Hu1,and G.Boulon3 1 Key Laboratory of Materials for High Power Laser,Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Shanghai 201800,China 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China 3 Physical Chemistry of Luminescence Materials,University of Lyon,UMR CNRS 5620,Villeurbanne 69622,France |
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| Abstract: | 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 Er3+ and O2-decreases after P2O5 is introduced.In the emission spectra,photo-luminescence intensity increases with increasing P2O5 concentration and the spectra are inhornogeneously broadened,revealing that the ligand electric field around Er3+ is dramatically changed,and the glass matrix becomes disordered. |
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