Abstract
Tungsten oxyfluoride glasses are characterized by low phonon energy. This is due to the presence of fluoride ions that have low phonon energy and formation of low phonon energy WO6 units. Oxyfluoride glasses based on WO3-BaF2-RF, where RF = LiF, NaF or mixed (LiF-NaF) have been prepared by melt quenching technique. The density and molar volume of the prepared glasses show a decrease with the increase of RF instead of WO3 content. The glass transition temperature Tg is found to decrease with increasing RF content. The refractive index increases with the addition of heavy polarizable fluorides. The decrease of the elastic moduli and microhardness of these glasses may be due to the decrease in density and the depolymrization effect. The Poisson's ratio increases with increasing RF content due to the structural changes and formation of (NBOs) and (NBF) units. The aim of this work is to prepare a glass host with low phonon energy to be an efficient host with good luminescence properties, when doped with rare earth ions, and to study its structural, thermal, optical and mechanical properties.
| Original language | English |
|---|---|
| Article number | 012125 |
| Journal | Journal of Physics: Conference Series |
| Volume | 830 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 4 May 2017 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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Compositional dependence of thermal, optical and mechanical properties of oxyfluoride glass. / Hager, I. Z.; Othman, H. A.; Valiev, D. T.
In: Journal of Physics: Conference Series, Vol. 830, No. 1, 012125, 04.05.2017.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Compositional dependence of thermal, optical and mechanical properties of oxyfluoride glass
AU - Hager, I. Z.
AU - Othman, H. A.
AU - Valiev, D. T.
PY - 2017/5/4
Y1 - 2017/5/4
N2 - Tungsten oxyfluoride glasses are characterized by low phonon energy. This is due to the presence of fluoride ions that have low phonon energy and formation of low phonon energy WO6 units. Oxyfluoride glasses based on WO3-BaF2-RF, where RF = LiF, NaF or mixed (LiF-NaF) have been prepared by melt quenching technique. The density and molar volume of the prepared glasses show a decrease with the increase of RF instead of WO3 content. The glass transition temperature Tg is found to decrease with increasing RF content. The refractive index increases with the addition of heavy polarizable fluorides. The decrease of the elastic moduli and microhardness of these glasses may be due to the decrease in density and the depolymrization effect. The Poisson's ratio increases with increasing RF content due to the structural changes and formation of (NBOs) and (NBF) units. The aim of this work is to prepare a glass host with low phonon energy to be an efficient host with good luminescence properties, when doped with rare earth ions, and to study its structural, thermal, optical and mechanical properties.
AB - Tungsten oxyfluoride glasses are characterized by low phonon energy. This is due to the presence of fluoride ions that have low phonon energy and formation of low phonon energy WO6 units. Oxyfluoride glasses based on WO3-BaF2-RF, where RF = LiF, NaF or mixed (LiF-NaF) have been prepared by melt quenching technique. The density and molar volume of the prepared glasses show a decrease with the increase of RF instead of WO3 content. The glass transition temperature Tg is found to decrease with increasing RF content. The refractive index increases with the addition of heavy polarizable fluorides. The decrease of the elastic moduli and microhardness of these glasses may be due to the decrease in density and the depolymrization effect. The Poisson's ratio increases with increasing RF content due to the structural changes and formation of (NBOs) and (NBF) units. The aim of this work is to prepare a glass host with low phonon energy to be an efficient host with good luminescence properties, when doped with rare earth ions, and to study its structural, thermal, optical and mechanical properties.
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U2 - 10.1088/1742-6596/830/1/012125
DO - 10.1088/1742-6596/830/1/012125
M3 - Article
VL - 830
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012125
ER -