The Structural Properties of Trivalent Rare Earth Ions (Er3+) Doped Borotellurite Glass

Six samples of borotellurite glasses with system (80-x)TeO2- 10B2O3 - 10PbO - xEr2O3 (x=0.0, 0.5, 1.0, 1.5, 2.0, 2.5 mol%) have been prepared by using the conventional melt-quenching method. Some basic physical parameters such as density and molar volume were measured. The result reveals that the density and molar volume increases with the increases of mol% of Er2O3. The amorphous nature of the glass has been characterized using X-ray Diffraction (XRD) and all glasses are found to be amorphous in nature. The structure was analysed by FTIR spectroscopy. The FTIR spectra were recorded at room temperature in the frequency range from 650 to 4000 cm-1 using Attenuated Total Reflectance (ATR) method. From the IR results, the absorption bands were found to be in the range 667-669 cm-1, 710-712 cm-1, 880-887 cm-1, 981-997 cm-1 and 1190-1204 cm-1 which correspond to the stretching and bending vibrations mode. The absorption peaks around 1386-1388 cm-1 and 3741-3748 cm-1 which ascribed to the hydroxyl-metal bond and hydroxyl-hydrogen bond stretching vibration also have been observed. The FTIR results demonstrate that the existing of erbium in the composition leads to good structural properties thus creating potential for this glass in laser applications.

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Samarium Concentration and Optical Correlation of Tellurite Glass

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1107.443 ◽

2015 ◽

Vol 1107 ◽

pp. 443-448

Author(s):

Sib Krishna Ghoshal ◽

Azmirawahida Zainuddin ◽

Ramli Arifin ◽

M.R. Sahar ◽

Md Supar Rohani ◽

...

Keyword(s):

Optical Properties ◽

Tellurite Glass ◽

Urbach Energy ◽

Photonic Devices ◽

Rare Earth Ions ◽

Indirect Transition ◽

Absorption Bands ◽

Quenching Effect ◽

Quenching Method ◽

Inorganic Glasses

Modifying the structural and optical properties of inorganic glasses via controlled doping of various rare earth ions by inhibiting the quenching effect is a challenging task. We report the influence of samarium (Sm3+) ions concentration on enhanced optical properties of tellurite glass. A series of glasses with composition (0.80-x)TeO2 + 0.10Li2O + 0.10 Na2O + xSm2O3, where 0.0<x <0.03 mol% are prepared using melt quenching method and optical characterizations are performed. The XRD spectra confirm the amorphous nature of the glass. The Urbach energy decreases and the optical gap for both direcet and indirect transitions increases with the increse of samerium contents. The UV-Vis spectra comprised of eight absorption bands and PL spectra reveal four prominet peaks corresponding to various transitions from the ground state to the excited states of Sm3+ ion. The optical response shows significant enhancement with increasing concentration of samerium ions. Our detail experimental analyses may be useful for the development of tellurite glass based photonic devices. Keywords: Tellurite Glass, Sm3+ ions, Urbach Energy, Direct and Indirect Transition.

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The Effect of PbO on the Physical and Structural Properties of Borate Glass System

Materials Science Forum ◽

10.4028/www.scientific.net/msf.846.177 ◽

2016 ◽

Vol 846 ◽

pp. 177-182 ◽

Cited By ~ 3

Author(s):

Mardhiah Abdullah ◽

S.N.E. Shafieza ◽

Azman Kasim ◽

Azhan Hashim

Keyword(s):

Molar Volume ◽

Structural Properties ◽

Glass Network ◽

Oxide Glass ◽

Sodium Borate ◽

Ftir Spectral Analysis ◽

Good Reputation ◽

Quenching Method ◽

Xrd Patterns ◽

Research World

Borate is one of the most popular oxide glass being used in glass research world wide. Due to good reputation, therefore lead sodium borate glasses with compositions (90 - x) B2O3 + 10ZnO + xPbO (where = 15, 20, 25, 30 and 35 mol %) have been prepared by using melt-quenching method. In this work, their physical and structural properties with respect to PbO content has been investigated. The densities of these glass samples were increased from 3946.2 kg/m3 to 5107.2 kg/m3 with an increase in PbO concentration. The molar volume are found to vary from 23.78 × 10-6 m3mol-1 to 24.39 × 10-6 m3mol-1 with respect to PbO content as well. The density and molar volume show inversed result respectively. The FTIR spectral analysis indicates that with the addition of PbO contents in the glass network, structural units of BO3 are transformed in BO4. There are no sharp peaks were observed in XRD patterns of the glass samples which confirmed the amorphous nature of the glass. Meanwhile, the micro hardness of these glass samples were also increased from 189 Pa to 355 Pa with increases on PbO content. The results will be discussed and presented in details.

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Upconversion Luminescence and Optical Studies of Nd3+: Bi2O3–B2O3–P2O5 Glasses

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.979.390 ◽

2014 ◽

Vol 979 ◽

pp. 390-394

Author(s):

Natthakridta Chanthima ◽

Narong Sangwaranatee

Keyword(s):

Molar Volume ◽

Ground State ◽

Glass Matrix ◽

Luminescence Band ◽

Upconversion Luminescence ◽

Optical Studies ◽

Melt Quenching ◽

Absorption Bands ◽

Borophosphate Glass ◽

Quenching Method

The bismuth borophosphate glass matrix doped with Nd2O3have been prepared by conventional melt quenching method with the molar compositions of 25Bi2O3: 5B2O3: (70-x)P2O5: xNd2O3(where x = 0.2, 0.4, 0.6, 0.8 and 1.0 mol%). The density, molar volume, optical absorption and upconversion luminescnece spectra were studied. It can be seen that the density is not depend on Nd2O3concentration. The molar volume is tending to be decreased with increasing of Nd2O3due to the decrease in the bond length or interatomic spacing between the atoms. Ten absorption bands at 427, 471, 510, 525, 580 , 622, 682, 743, 802 and 873 nm are observed, which could be ascribed to Nd3+transitions from the4I9/2ground state to2P1/2,2G9/2,4G9/2,4G7/2,4G5/2+2G7/2,2H11/2,4F9/2,4F7/2+4S3/2,4F5/2+4H9/2and4F3/2levels. The upconversion luminescence band at 394 nm was observed and the highest emission intensity was obtained at 0.8 mol% of Nd2O3.

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Controlled physical and optical traits of magnesium-zinc sulphophosphate glass: Role of europium ions

Malaysian Journal of Fundamental and Applied Sciences ◽

10.11113/mjfas.v14n0.1279 ◽

2018 ◽

Vol 14 ◽

pp. 463-467

Author(s):

Ibrahim Mohammed Danmallam ◽

Sib Krishna Ghoshal ◽

Ramli Ariffin ◽

Siti Aisha Jupri ◽

Sunita Sharma

Keyword(s):

Optical Properties ◽

Emission Spectra ◽

Analytical Techniques ◽

Photonic Devices ◽

Rare Earth Ions ◽

Absorption Data ◽

Stable Glasses ◽

Trivalent Rare Earth ◽

Quenching Method

Trivalent rare earth ions doped sulfophosphate glasses became demanding owing to their several notable attributes that are advantageous for diverse photonic devices. To fulfil such goal, preparation of sulfophosphate glasses with optimized composition by selecting appropriate modifier and subsequent characterizations are essential. Driven by this idea, we synthesized a new series of europium (Eu3+) ions doped magnesium-zinc-sulfophosphate glasses of composition (65–x) P2O5–20MgO-15ZnSO4–xEu2O3 (x = 0.0, 0.5, 1.0, 1.5 and 2.0 mol%) using simple melt-quenching method. As-prepared glasses were characterized thoroughly at room temperature via various analytical techniques to determine the Eu2O3 concentration-dependent physical and optical properties. Transparent (pinkish) and thermally stable glasses were achieved. XRD pattern confirmed the amorphous nature of the studied glasses. Glass density was increased from 2.603 to 2.789 g/cm-3 with the increase of Eu2O3 contents from 0 to 2.0 mol%. FTIR spectra revealed the characteristics bonding vibrations (symmetric and asymmetric stretching and bending of nS (P-O), naS (P-O-P), nS (P-O-P), nS P3O, nS (P-O-P)of phosphate networks linkages. The UV-Vis-NIR spectra of the glasses disclosed six significant absorption peaks centred at 360, 380, 394, 414, 465, and 531 nm accompanied by two NIR peaks around 2091 and 2205 nm allocated to various transitions from the ground state to the excited states of Eu3+ ion. Furthermore, the optical absorption data were further used to calculate the energies of direct (2.0 to 3.85 eV) and indirect (3.74 to 5.0 eV) band gap as well as Urbach energies (0.1909 to 0.2440 eV). The photoluminescence (PL) emission spectra of glasses displayed four peaks entered at 593, 613, 654 and 701 nm assigned to the 5Do→7Fo, 5Do→7F2, 5Do→7F3 and 5Do→7F4 transitions of Eu3+ ion. The PL peak at 613 nm showed the highest emission intensity. The PL intensity was enhanced with the increase of Eu3+ content up to 1.5 mol% and quenched thereafter. It was concluded that controlled physical and optical properties can be obtained by appropriately optimizing the glass composition useful for photonic purposes.

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Dielectric Constant, Metallization Criterion and Optical Properties of CuO Doped TeO2-B2O3 Glasses

10.21203/rs.3.rs-1175617/v1 ◽

2021 ◽

Author(s):

NAZIRUL NAZRIN SHAHROL NIDZAM ◽

S.A. Umar ◽

M.K. Halimah ◽

M.M. Marian ◽

Z.W. Najwa ◽

...

Keyword(s):

Dielectric Constant ◽

Refractive Index ◽

Molar Volume ◽

Copper Ion ◽

Volume Density ◽

Dielectric Constants ◽

Physical Parameters ◽

Laser Applications ◽

Optical Dielectric Constant ◽

Ftir Spectral Analysis

Abstract Copper oxide doped TeO2 – B2O3 glass system with empirical formula; [(B2O3)0.3(TeO2)0.7]1-x(CuO)x using the melt quenching method, where x = 0.0, 0.01, 0.015, 0.02, and 0.025 was combined. The glass samples’ density and molar volume were measured, followed by characterizations using the UV-Vis, Fourier transform infrared (FTIR) and X-ray diffraction (XRD) spectroscopes. The amorphous or glassy nature of glass samples was proven by the XRD spectra except for the pure borotellurite sample which showed a peak around 2θ = 20o, indicating α-TeO2 crystalline phase presence. The FTIR spectral analysis suggested the presence of BO3, TeO3 and TeO4 as the structural functional units in the glass samples. The UV-Vis spectra showed no presence of any sharply defined edges, affirming the amorphous or glassy nature of the glass materials. Physical parameters e.g. molar volume, density, oxygen packing density (OPD), inter ionic distance of Cu2+ ions, concentration of copper ion per unit volume (N), as well as the polaron radius data were presented and discussed. Also, the direct bandgap (3.8900 to 3.5900 eV) , indirect bandgap (3.3200 to 3.0800 eV), refractive index (2.318 to 2.378), dielectric constant (5.3731 to 5.6549), optical dielectric constant (4.3731 to 4.6549), refractive index based metallization criterion (0.406885 to 0.391916) and the band gap based metallization criterion (0.407431 to 0.392428) were analysed and discussed. Based on the metallization criterion and values of refractive index, the glasses are good candidates for optoelectronic and laser applications. Meanwhile, the dielectric constants’ values of the present glasses indicate their suitability bandpass filters and microelectronic substrates applications.

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Hardness and Structure of Er3+:Sm3+ Co-Doped Oxychloride Zinc Tellurite Glass

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.268.43 ◽

2017 ◽

Vol 268 ◽

pp. 43-47

Author(s):

S.N. Nazhirah Mazlan ◽

Ramli Arifin ◽

Sib Krishna Ghoshal

Keyword(s):

Structural Properties ◽

Tellurite Glass ◽

Glass Composition ◽

Rare Earth Ions ◽

Host Matrix ◽

High Performing ◽

Co Doping ◽

Quenching Method ◽

Ir Bands

Glass samples with composition of (64-x)TeO2 + (x)ZnO + 15 ZnCl2 + 0.5 Sm2O3 + 0.5 Er2O3 (x = 20, 25 and 30 mol%) are prepared by melt quenching method. The season for co-doping with rare earth ions such as samarium (Sm3+) and erbium (Er3+) is to explore the feasibility of their simultaneous exploitation as high performing up-converted lasing materials. The role of varying modifier of ZnO concentration in improving the hardness and structural properties are evaluated. The density is observed to reduce and ionic packing density is augmented with increasing concentration of ZnO. Glass with 25 mol% of ZnO revealed the optimum hardness of 2830 N/mm2. Incorporation of Zn2+ into the tellurite host matrix is found to shift the IR bands position slightly without altering their intensity. Bonding vibrations corresponding to bending of TeO3 unit (784-762 cm-1), stretching of TeO4 units (678-676 cm-1) and Zn-O bonds (462-452 cm-1) are evidenced. Incorporation of ZnO as modifier is established to enhance the hardness and improved the structural properties. The proposed glass composition may be useful for industrial purposes.

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Infra-red spectra and the solid state. III. Potassium bifluoride

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1951.0241 ◽

1951 ◽

Vol 210 (1101) ◽

pp. 206-216 ◽

Cited By ~ 47

Keyword(s):

Room Temperature ◽

Potential Energy Function ◽

Vibration Frequencies ◽

Fundamental Vibration ◽

Absorption Bands ◽

Bending Vibrations ◽

X Ray ◽

Higher Power ◽

Infra Red ◽

Stretching Vibration

The infra-red spectrum of potassium bifluoride has been determined between 2 and 8μ at temperatures between 293 and 90° K. On passing from room temperature to that of liquid air, some of the absorption bands sharpen and split. The results have been analyzed with the object of assigning fundamental vibration frequencies to the (HF 2 ) - ion, and also of deciding whether this ion has a symmetrical or unsymmetrical structure. Values assigned to the stretching vibration frequencies are 600 and 1450 cm. -1 , and to the deformation a pair at 1225/1274 cm. -1 . The spectrum can then be satisfactorily explained in terms of the selection rules which would be expected for a symmetrical (HF 2 ) - ion lying in the particular crystal field suggested by X-ray work. Whereas the bending vibrations appear to involve little anharmonic character, there is an apparently large negative anharmonic coefficient for the overtone and combinations of the stretching vibration frequencies. This might be expected if the potential energy function for the antisymmetrical stretching vibration involved a higher power of the displacement co-ordinate than the second, and strengthens the interpretation in terms of a symmetrical ion. The molecular enviromnent of the ion in the crystal state leads to a removal of the degeneracy of the deformational vibration, the latter being found to split, although one component is not noticed in absorption when the crystal is viewed along the c -axis.

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Concentration Dependent Luminescence and Energy Transfer Properties of Samarium Doped LLSZFB Glasses

Current Physical Chemistry ◽

10.2174/1877946809666190724152259 ◽

2019 ◽

Vol 9 (2) ◽

pp. 110-122 ◽

Cited By ~ 1

Author(s):

Gudelly Anjaiah ◽

Thammisetty Sasikala ◽

Puram Kistaiah

Keyword(s):

Energy Transfer ◽

Optical Absorption ◽

Rare Earth Ions ◽

Oscillator Strengths ◽

Luminescence Properties ◽

Luminescence Spectra ◽

Energy Transfer Mechanism ◽

Absorption Bands ◽

Optical Applications ◽

Quenching Method

Background: Recently, great importance has been devoted to borate glass systems doped with rare-earth ions because of their unique peculiar properties in the field of photonics for optical applications. Objective: The purpose of the present study is to investigate the effect of concentration of Sm3+ ions on the luminescence properties of lead fluoroborate glasses through the energy transfer mechanism. Materials and Methods: Samarium doped lead fluoroborate glasses with chemical composition 20PbF2 .10Li2O .5SrO .5ZnO. (60-x) B2O3. xSm2O3 (where x = 0.1, 0.5, 1.0, 1.5 and 2.0 mol %) were prepared by means of melt quenching method. The concentration dependent luminescence properties were investigated in detail from the optical absorption, photoluminescence and decay analysis. Judd-Ofelt (J-O) theory was applied to analyze the optical absorption spectra. The experimental oscillator strengths of absorption bands have been used to determine the J-O parameters. Using the J-O parameters Ωλ (λ = 2, 4 and 6) and luminescence data several radiative parameters were obtained. Results: From the luminescence spectra, it was noticed that luminescence quenching starts at higher concentrations of Sm3+ ions (x ≥ 0.5 mol %). The decay curves of 4G5/2 → 6H7/2 transition exhibit a single exponential at lower dopant concentrations (x= 0.1 and 0.5 mol %) and non-exponential at higher concentrations (x ≥ 1 mol %). The concentration quenching was attributed to the energy transfer through the cross-relaxation between Sm3+ ions. The non-exponential curves were well fitted to Inokuti-Hirayama model for S = 6, indicating that the energy transfer between Sm3+ - Sm3+ ions is of dipole-dipole type. The calculated color coordinates of the as-prepared glasses fall within the reddish-orange region of the CIE diagram. Conclusion: All the experimental results indicate that the 0.5 mol% Sm3+ ions doped LLSZFB glass can be a possible choice for solid state lighting and display applications.

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Kathodo- und Photolumineszenz der Seltenerd-aktivierten Wirtsgitter Ba2La2B2+Te2O12 (B = Zn, Mg)

Zeitschrift für Naturforschung A ◽

10.1515/zna-1986-0614 ◽

1986 ◽

Vol 41 (6) ◽

pp. 866-870 ◽

Cited By ~ 1

Author(s):

H.-D. Autenrieth ◽

S. Kemmler-Sack

Keyword(s):

Electronic Structure ◽

Rare Earth ◽

Visible Region ◽

Host Lattice ◽

Rare Earth Ions ◽

New Host ◽

Emission Efficiency ◽

Transfer Processes ◽

Trivalent Rare Earth ◽

Host Lattices

By activation of the new host lattices Ba2La2B2+Te2O12 (B = Zn, Mg) with trivalent rare earth ions Ln3+ = Pr. Sm, Eu, Tb, Dy, Ho, Tm an emission in the visible region is observed. The influence of the electronic structure and concentration on the relative emission efficiency as well as the host lattice participation in the energy transfer processes are discussed.

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