Influence of Samarium on the Optical Response of Zinc Phosphate Glass

2015 ◽  
Vol 1107 ◽  
pp. 403-408 ◽  
Author(s):  
Siti Amlah Mohamad Azmi ◽  
M.R. Sahar ◽  
Ramli Arifin ◽  
Sib Krishna Ghoshal
Keyword(s):  
Excited States ◽  
Zinc Phosphate ◽  
Rapid Quenching ◽  
Phosphate Glasses ◽  
Relaxation Processes ◽  
Melt Quenching ◽  
Zinc Phosphate Glass ◽  
Amorphous Nature ◽  
Quenching Method ◽  
Xrd Patterns

Samarium doped zinc phosphate glasses of the form 40ZnO-(60-x) P2O5-xSm2O3, with 1.0 ≤ x ≤ 5.0 mol% were prepared using the melt quenching method. The XRD patterns confirmed the amorphous nature of the glass. The Archimedes method was used to measure the density, which was used to calculate the molar volumes. The density was found to vary in the range of 2.839 to 3.138 gm/cm3 while the molar volume varied between 40.80 and 42.21cm3/mol. The effect of samarium on the optical absorption and emission characteristics were examined. The absorption spectra exhibit two dominant absorption peaks corresponding to the transitions from 6H5/2 ground state to 4I11/2 and 4F7/2 excited states, respectively. Photoluminescence emission consisting of 4G5/2 à 6H5/2, 6H7/2, 6H9/2 and 6H11/2 transitions display significant enhancement with the increase of Sm3+ concentration up to 3.0 mol% followed by a rapid quenching beyond this concentration which is ascribed to the nonradiative energy transfer and multi-phonon relaxation processes.

Structural and Thermal Characterization of Antimony-Phosphate Glass

2017 ◽  
Vol 268 ◽  
pp. 33-37
Author(s):  
S.Y. Moustafa ◽  
Md Rahim Sahar ◽  
Sib Krishna Ghoshal
Keyword(s):  
Thermal Characterization ◽  
Melt Quenching ◽  
Sem Images ◽  
Amorphous Nature ◽  
Quenching Method ◽  
Xrd Patterns ◽  
New Research ◽  
Antimony Phosphate ◽  
Approximate Percentage

A new ternary glass systems of composition xSb2O3-(75-x) P2O5-25MgO, where x = 30, 40, 50 mol%; has been prepared via melt-quenching method. Synthesized glasses are characterized using XRD, FESEM, EDX, and TG/DTA measurements. The influence of varying Sb2O3 concentrations on their thermal properties and crystal structure is evaluated. The XRD patterns confirmed the amorphous nature of samples. SEM images demonstrated interesting phase formation with ribbons-like texture. Three crystalline phases were observed in this glass series which are antimony phosphate, antimony orthophosphate and cervantite. EDX spectra detected the approximate percentage of the raw elemental traces. Thermal analysis of these glasses revealed their high-molecular polymer character for Sb2O3 content at 50 mol%. Three different glass transition temperatures are achieved with three different composition each, which are (276, 381, 422 °C) at x=30 mol%, (276, 381, 470 °C) at x=40 mol% and (276, 381, 443 °C) at x=50 mol%. Furthermore, the solidus and liquidus temperature are found to decrease with increasing Sb2O3. This observation may open up new research avenues for antimony based ternary glasses.

DC and Thermal Conductivity of Lithium Zinc Phosphate Glasses

2017 ◽  
Vol 268 ◽  
pp. 198-204
Author(s):  
A.M. Hilman ◽  
E.S. Sazali ◽  
Md Rahim Sahar ◽  
K. Azman ◽  
Yahya Norihan
Keyword(s):  
Thermal Conductivity ◽  
Molar Volume ◽  
Zinc Phosphate ◽  
Arrhenius Plot ◽  
Phosphate Glasses ◽  
X Ray Diffraction ◽  
X Ray ◽  
Straight Line ◽  
Amorphous Nature ◽  
Quenching Method

The phosphate glasses, with composition (60-x)P2O5-25ZnO-(15+x)Li2O where 0.0 ≤ x ≤ 5.0 mol% are prepared by conventional melt quenching method. The amorphous nature of the glass is determined by X-Ray Diffraction (XRD). The physical properties are measured in term of their density and molar volume. Glass density is found to increase from 2.700 to 2.785 g cm-3 whereas molar volume is found to decrease from 40.735 to 37.488 cm3 mol-1 with respect to Li2O content. The DC measurements are done by using four point probes and the activation energies are determined. Arrhenius plot shows straight line behavior as observed that confirmed the conductivity increased with Li2O content. The activation energy is found to decreases from 0.75 to 0.08 eV as Li2O content is increased in the temperature range from 310 to 420 K. Measurements of the thermal conductivity using Lee’s disc apparatus have been made. It is observed that the maximum and minimum thermal conductivity are 0.2679 and 0.2168 W m-1 K-1 respectively.

Judd-Ofelt Parameters of Erbium Doped Zinc Phosphate Glass Containing Natural Ferrite Oxide Nanoparticles

2019 ◽  
Vol 290 ◽  
pp. 41-45
Author(s):  
Puzi Anigrahawati ◽  
M.R. Sahar ◽  
Sib Krishna Ghoshal
Keyword(s):  
Phosphate Glass ◽  
Zinc Phosphate ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Erbium Ions ◽  
Intensity Parameters ◽  
Zinc Phosphate Glass ◽  
Erbium Doped ◽  
Quenching Method

Erbium ions (Er3+) doped zinc phosphate glass system with varying contents of natural ferrite (Fe3O4) nanoparticles were prepared using melt quenching method. The glass is characterized by x-ray diffraction (XRD) and UV-VIS NIR spectrometer. It is observed that the amorphous nature of the glass is confirmed by x-ray diffraction. The absorption spectra of the glass are recorded in the UV-Visible in the range of 400-1600 nm. The UV-VIS NIR spectra reveal ten absorption peaks centered at 376, 406, 420, 486, 522, 546, 652, 798, 976 and 1534 nm, correspond to the transitions from the ground state 4I15/2 to higher 4I13/2, 4I11/2, 4I9/2, 4F9/2, 4S3/2, 2H11/2, 4F7/2, 4F3/2, 2H9/2, 4G11/2 levels, respectively. Effects of natural ferrite oxide nanoparticles on the absorption and emission properties of the synthesized glasses were analyzed via Judd-Ofelt (J-O) theory. The J-O intensity-parameters (W2, W4, W6) analysis demonstrate a significant increase of spectroscopic quality factors.Keywords: Fe3O4 NPs, Absorption, Judd-Ofelt.

Optical Absorption of Erbium Doped Zinc Phosphate Glass Containing Fe3O4 Nanoparticles

2015 ◽  
Vol 1107 ◽  
pp. 420-425 ◽  
Author(s):  
Puzi Anigrahawati ◽  
M.R. Sahar ◽  
Md Supar Rohani ◽  
Sib Krishna Ghoshal
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Band Gap ◽  
Molar Volume ◽  
Urbach Energy ◽  
Phosphate Glasses ◽  
Zinc Phosphate Glass ◽  
Erbium Doped ◽  
Quenching Method ◽  
Average Size

Modifying the optical properties of rare earth doped phosphate glasses in a tunable fashion via the embedment of magnetic nanoparticles (NPs) is challenging for magneto-optic devices. Glasses with compositions (69-x)P2O5-30ZnO-1Er2O3-(x)Fe3O4, where x = 0 to 1.5 mol% are prepared by conventional melt quenching method. The Fe3O4NPs concentration dependent density, molar volume, refractive index and optical properties are determined. Density and molar volume shows strong correlation with structural alteration in the presence of NPs. The XRD spectra confirm the disordered nature of the glass and TEM micrograph display the presence of spherical NPs with average size ~26 nm. The optical band gap and Urbach energy calculated from the room temperature absorption spectra recorded in the range of 350-1700 nm reveal significant improvement. The density and refractive index increases and the molar volume decreases with the increase of Fe3O4contents. The energy band gap for direct and indirect transitions varies in the range of 4.47-3.64 eV and 4.27-3.53 eV, respectively. The Urbach energy increases from 0.15 to 0.19 eV as the NPs concentration increases from 0 to 1.5 mol%.

Influence of Eu3+ on Physical and Thermal Properties of Borotellurite Glass Containing Manganese Oxides Nanoparticles

2017 ◽  
Vol 268 ◽  
pp. 124-127
Author(s):  
Md Rahim Sahar ◽  
Siti Maisarah Aziz ◽  
K. Sulhadi
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Thermal Properties ◽  
Manganese Oxides ◽  
Melt Quenching ◽  
Xrd Pattern ◽  
Amorphous Nature ◽  
Quenching Method ◽  
Europium Concentration ◽  
Manganese Nanoparticles

The influence of the europium concentration on the physical and thermal properties of manganese nanoparticles (Mn3O4 NPs) ) embedded borotellurite glass are studied. Glasses with composition (59-x)TeO2-30B2O3-10MgO-xEu2O3-1Mn3O4 (where x = 0.5, 1.0 and 1.5 mol%) are prepared by melt-quenching method and characterized using XRD and Differential Thermal Analysis (DTA). The XRD pattern confirms the amorphous nature of all samples.The physical properties such as density (ρ) and molar volume (Vm) are calculated. The thermal properties of borotellurite glasses show that the glass with 1.0 mol % of Eu2O3 possess the highest stability.

OPTICAL AND SPECTROSCOPIC STUDIES OF Fe2O3-Bi2O3-B2O3:V2O5 GLASSES

2013 ◽  
Vol 27 (28) ◽  
pp. 1350207
Author(s):  
SANJAY ◽  
N. KISHORE ◽  
A. AGARWAL ◽  
S. DAHIYA ◽  
INDER PAL ◽  
...  
Keyword(s):  
Optical Band Gap ◽  
Transition Metal Ions ◽  
Amorphous Solids ◽  
Spectroscopic Studies ◽  
Band Gap Energy ◽  
Melt Quenching ◽  
Gap Energy ◽  
Amorphous Nature ◽  
Urbach’S Energy ◽  
Xrd Patterns

The glasses of compositions x Fe 2 O 3⋅ (40 - x) Bi 2 O 3⋅60 B 2 O 3⋅2 V 2 O 5 have been prepared by the standard melt-quenching technique. Amorphous nature of these samples is ascertained by XRD patterns. The presence of BO 3 and BO 4 units is identified by IR spectra of glass samples. The absorption edge (λ cut-off ) shifts toward longer wavelengths with an increase in Fe 2 O 3 content in the glass matrix. The values of optical band gap energy for indirect allowed and forbidden transitions have been determined and it is found to decrease with increase in transition metal ions. The Urbach's energy is used to characterize the degree of disorder in amorphous solids.

scholarly journals Effect of Vanadium on Structural and Optical Properties of Borate Glasses Containing Er3+ and Silver Nanoparticles

2021 ◽  
Author(s):  
Nur Adyani Zaini ◽  
Syafawati Nadiah Mohamed ◽  
Zakiah Mohamed
Keyword(s):  
Optical Properties ◽  
Optical Band Gap ◽  
Urbach Energy ◽  
Structural And Optical Properties ◽  
Intensity Parameter ◽  
Vanadium Concentration ◽  
Prepared Glass ◽  
Amorphous Nature ◽  
Quenching Method ◽  
Xrd Patterns

Glass samples (59.5 – x) B2O3 – 20Na2O – 20CaO – xV2O5 – Er2O3 – 0.5AgCl (x = 0 – 2.5 mol%) were prepared using melt – quenching method to investigate the structural and optical properties of the glass. The structural of the glass were characterized by using XRD, TEM and FTIR, meanwhile the optical properties were characterized by UV – VIS absorption. The XRD patterns confirmed the amorphous nature of the prepared glass samples. FTIR confirmed the presence of VO4, VO5, BO3, and BO4 vibration, and this result showed NBO increased with increasing vanadium concentration. The UV – Vis – NIR spectra exhibits six absorption band centered at 490, 520, 540, 660, 800, and 980 nm. The optical band gap (Eopt), Urbach energy and refractive index shown decrease, increase and increase, respectively. The Judd – Ofelt intensity parameter reveal the trends was Ω2 > Ω4 > Ω6. There are three emission bands at 516 nm, 580 nm, and 673 nm which are represented by 2H11/2 – 4I15/2, 4S3/2 – 4I15/2, and 4F15/2 – 4I15/2, respectively under 800 nm excitation was obtained.

scholarly journals Green Emission of Tellurite Based Glass Containing Erbium Oxide Nanoparticles

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Azlan Muhammad Noorazlan ◽  
Halimah Mohamed Kamari ◽  
Sharudin Omar Baki ◽  
Daud W. Mohamad
Keyword(s):  
Excited States ◽  
Green Emission ◽  
Ftir Analysis ◽  
Erbium Oxide ◽  
Structural And Optical Properties ◽  
Melt Quenching ◽  
Intensity Parameters ◽  
Quenching Method ◽  
Broad Green Emission ◽  
Xrd Method

Investigation on green emission and spectral intensity of tellurite based glass containing erbium oxide NPs is one of the crucial issues. Tellurite based glass containing erbium oxide NPs with the composition of{[(TeO2)0.70(B2O3)0.30]0.7(ZnO)0.3}0.95(Er2O3)0.05has been prepared by using conventional melt-quenching method. The structural and optical properties of the glass sample were characterized by using XRD, FTIR, UV-Vis absorption, and PL spectroscopy. The amorphous structural arrangement was proved through XRD method. The formation of TeO3and BO3units was revealed by FTIR analysis. Five transition states of excitation were shown in UV-Vis spectra which arise from the ground state4I15/2to the excited states4G11/2+2H9/2+4F5/2+4F7/2+2H11/2+4S3/2+4F9/2+4I9/2+4I11/2. The intensity parametersΩt(t=2, 4, 6) are calculated and follow the trend ofΩ2>Ω4>Ω6. Broad green emission at 559 nm under 385 nm excitation was obtained.

scholarly journals Structural and Optical Properties of Nd3+ Doped Na2O-PbO-ZnO-Li2O-B2O3 Glasses System

2016 ◽  
Vol 675-676 ◽  
pp. 424-429 ◽  
Author(s):  
Juniastel Rajagukguk ◽  
Rahmat Hidayat ◽  
Suprijadi ◽  
Mitra Djamal ◽  
Y. Ruangtaweep ◽  
...  
Keyword(s):  
Borate Glass ◽  
Structural And Optical Properties ◽  
Ion Content ◽  
Melt Quenching ◽  
Hypersensitive Transition ◽  
Amorphous Nature ◽  
Measured Absorption ◽  
Lead Zinc ◽  
Lithium Borate Glass ◽  
Quenching Method

The present paper reports the structural (XRD and FTIR spectra), physical (like density, molar volume, refractive index etc.), optical absorption and emission properties of Nd3+ doped sodium lead zinc lithium borate glass. The glasses with chemical formula (65-x)B2O3-15Na2O-10PbO-5ZnO-5Li2O-xNd2O3 (where x = 0, 0.05, 0.1, 0.5, 1.0, 2.0 and 4.0) have been prepared using the melt-quenching method. XRD characterization shows that the glasses are amorphous nature. The values of measured absorption transitions obtained ten transitions and the hypersensitive transition at 4I9/2 → 2G7/2+4G5/2. To excite photon from ground state to upper state, used two different wavelength spectra at 582 and 804 nm. The maximum emission intensity of the 4F3/2 → 4I11/2 transition obtained when Nd3+ ion content in the borate glass is 1.0 mol %. It is indicating that Nd3+ doped borate glass have self-quenching or concentration quenching.

scholarly journals Investigation on Structure of TeO2-B2O3-SiO2-Al2O3-KF Glasses

2020 ◽  
Vol 36 (2) ◽  
Author(s):  
Phan Van Do
Keyword(s):  
Optical Band Gap ◽  
Urbach Energy ◽  
Thermal Studies ◽  
Glass Network ◽  
X Ray Diffraction ◽  
Melt Quenching ◽  
X Ray ◽  
Thermal Analyzer ◽  
Amorphous Nature ◽  
Xrd Patterns

Borotellurite glasses were prepared by melt quenching technique. Amorphous nature of samples was confirmed through X-ray diffraction (XRD) patterns. Effect of B2O3 content on the structure of glass network was studied through Fourier-transform infrared spectroscopy (FTIR) spectra. Optical band gap and Urbach energy were found from analysis of optical absorption spectra. Thermal studies were carried out by using Differential thermal analyzer (DTA) measurements.

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