Aluminophosphate-doped glasses with rare-earth ions

2000 ◽  
Author(s):  
Rodica Rogojan ◽  
Paul E. Sterian ◽  
Mihai Elisa
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Doped Glasses

scholarly journals Vibrational, Thermal, and Physical Characterizations of Some Zinc Niobo Tellurite Glasses Doped with Rare Earth (Eu, Dy)-=SUP=-*-=/SUP=-

2021 ◽  
Vol 129 (4) ◽  
pp. 527
Author(s):  
Afrash Ejigu A ◽  
K.P. Ramesh ◽  
Gajanan Honnavar
Keyword(s):  
Rare Earth ◽  
Packing Density ◽  
Local Environment ◽  
Peak Shift ◽  
Rare Earth Ions ◽  
Physical Parameters ◽  
Tellurite Glasses ◽  
Rare Earth Ion ◽  
Raman Spectroscopic ◽  
Doped Glasses

In this communication, we report physical and thermal properties along with Raman spectroscopic investigations on Zinc Niobo Tellurite glass systems doped with Eu2O3 and Dy2O3 at the expense of TeO2. The glasses have been synthesized by the melt quenching technique. Physical parameters like density, molar volume, packing density were estimated. The density of the un-doped glasses increases with increasing mol% of the modifier (ZnO) whereas the glass transition temperature (Tg) decreases. We have observed an increase in the density of the base glass systems which are doped with rare earth (RE) dopants. The packing density of the un-doped glasses remains almost constant with increasing modifier content suggesting that there is not much change in the local environment. Raman spectra were recorded at room temperature and assigned to TeO4 and TeO3 structural units in these glasses. The peak shift, full width at half maximum (FWHM) of the de-convoluted Raman peaks were analyzed to get information about the local environment. It is observed that these compositions of tellurite glasses are good host materials for rare earth ions as they offer voids in the network. Further, it was observed that the rare earth ion doping has not affected the local environment of the glasses; Dy3+ ions have a slightly higher tendency to polarize Te-O bonds than the Eu3+ ions. Keywords: Niobium-based tellurite glasses, XRD, DSC, FTIR.

Luminescence properties of rare earth ions doped glasses excited by broadband lights

2013 ◽  
Author(s):  
Linjiao Ren ◽  
Xiaohua Lei ◽  
Weimin Chen ◽  
Xiaoqing Du ◽  
Lei Jin
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Luminescence Properties ◽  
Doped Glasses

The Effect of Nd3+ Composition on Judd-Ofelt Analysis of Lithium Niobate Tellurite Glasses Codoped with Er3+

2017 ◽  
Vol 268 ◽  
pp. 191-197 ◽  
Author(s):  
Nurhafizah Hasim ◽  
Md Supar Rohani
Keyword(s):  
Rare Earth ◽  
Glass Network ◽  
Rare Earth Ions ◽  
Oscillator Strengths ◽  
Tellurite Glasses ◽  
Melt Quenching ◽  
Intensity Parameters ◽  
Doped Glasses ◽  
Rare Earth Doped ◽  
Covalent Nature

The modification of absorption characteristics in rare-earth doped tellurite glasses is important in photonics application. The Er3+/Nd3+ doped glasses of the form (69-x)TeO2–15Li2CO3–15Nb2O5–1Er2O3 -(x)Nd2O3 with x =0.2 and 0.6 mol% are successfully made by using conventional melt-quenching technique. The Judd-Ofelt analysis is to determine the local structure and bonding in the vicinity of rare-earth ions. The oscillator strengths are calculated from the absorption spectra and used to evaluate Judd-Ofelt intensity parameters (Ωλ, λ=2, 4 and 6). The values of Ω4 and Ω6 change with the increase of Nd3+ concentration is ascribed to the change in glass network structures. The values of Ω2 are increased from 1.53 to 37.13 (10-22) cm2 with the increase of Nd3+ concentration which indicate an increase in the covalent nature of Nd-O bond and less centrosymmetrical the ion sites. The decrease in τrad for each level with the increase of Nd3+ concentration signifies on how fast a particular level gets depopulated. The values of β for the transitions 4G5/2, 2G7/2 → 4I9/2, 2H11/2 → 4I9/2 and 4F9/2 → 4I9/2 are found to lie in between 99.6 to 100.0%.

Non-destructive concentration measurements of rare earth ions in doped glasses

1993 ◽  
Vol 161 ◽  
pp. 231-234 ◽  
Author(s):  
A. Bulou ◽  
A. Coudreuse ◽  
M. Fornoni ◽  
M. Rousseau ◽  
A. Fornier ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Doped Glasses ◽  
Concentration Measurements ◽  
Non Destructive

scholarly journals Collective Optical, FTIR, and Photoluminescence Spectra of CeO2 and/or Sm2O3-Doped Na2O–ZnO–P2O5 Glasses

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
M. A. Marzouk ◽  
H. A. ElBatal ◽  
Y. M. Hamdy ◽  
F. M. Ezz-Eldin
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Spectral Studies ◽  
Luminescence Spectra ◽  
Ir Absorption ◽  
Photoluminescence Spectra ◽  
Absorption Bands ◽  
Infrared Spectral ◽  
Doped Glasses ◽  
The Rare Earth

Glasses with the Na2O–ZnO–P2O5 composition and doped with single CeO2, Sm2O3, or mixed dopants were melted and studied. Collective optical, photoluminescence, and FT-infrared spectral studies were carried out. CeO2-doped glasses show two extra UV absorption bands due to Ce4+ and Ce3+ ions while Sm2O3-doped samples reveal pronounced peaks collected into two segments from 367 to 472 nm and from 950 to 1623 nm which are characteristic of absorption from Sm3+ ions. The mixed dopants glasses show combined UV-visible–near-IR absorption peaks due to cerium (Ce4+, Ce3+) ions and samarium (Sm3+) ions. The photoluminescence spectra (PL) of the single CeO2-doped and Sm2O3-doped glasses and even the mixed dopant sample reveal luminescence spectra after excitation which are characteristic of the rare-earth ions. The intensities for both excited or emitted peaks are found to increase with the increase of the rare-earth percent. FTIR spectra of the glasses show pronounced vibrational peaks related to phosphate groups (Q2 and Q3 units) in accordance with the P2O5 percent (70 mol %).

Generation of Induced Structures in Rare-Earth-Ions-Doped Glasses

2001 ◽  
pp. 86-121
Author(s):  
Kazuyuki Hirao ◽  
Tsuneo Mitsuyu ◽  
Jinhai Si ◽  
Jianrong Qiu
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Doped Glasses

White light luminous properties and energy transfer mechanism of rare earth ions in Ce3+/Tb3+/Sm3+ co-doped glasses

2013 ◽  
Vol 115 (4) ◽  
pp. 1159-1166 ◽  
Author(s):  
Qiaoqiao Chen ◽  
Nengli Dai ◽  
Zijun Liu ◽  
Yingbo Chu ◽  
Baoyuan Ye ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Rare Earth ◽  
White Light ◽  
Transfer Mechanism ◽  
Rare Earth Ions ◽  
Energy Transfer Mechanism ◽  
Doped Glasses ◽  
Co Doped
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