Title of article :
Thermal, chemical and structural characteristics of erbium-doped sodium phosphate glasses
Author/Authors :
P.Y Shih، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2004
Abstract :
Thermal, chemical and structural characteristics of the erbium-doped sodium phosphate glasses with 1–6 mol% Er2O3 were investigated. The glass transition temperature increase, but the thermal expansion coefficient and the dissolution rate of the glasses decrease with increasing Er2O3 content. X-ray photoelectron spectroscopy (XPS) and Fourier transformed infrared (FTIR) spectrometer were used to inspect the structural changes of the glasses. The doping of Er2O3 induces the depolymerization of the glasses at the Q3 tetrahedral sites. The relative content of bridging oxygen (b-O) decreases and that of non-bridging oxygen (nb-O), which is attributed to the forming of the ionic P–O−⋯Er3+ linkages between phosphate chains, increases with increasing Er2O3 content.
Keywords :
Erbium-doped sodium phosphate , X-ray photoelectron spectroscopy (XPS) , Fourier transformed infrared (FTIR) spectroscopy , Glass transition temperature , Bridging oxygen
Journal title :
Materials Chemistry and Physics
Journal title :
Materials Chemistry and Physics