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.

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.

scholarly journals Impact of Dy2O3 Substitution on the Physical, Structural and Optical Properties of Lithium–Aluminium–Borate Glass System

2020 ◽  
Vol 10 (22) ◽  
pp. 8183
Author(s):  
Osama Bagi Aljewaw ◽  
Muhammad Khalis Abdul Karim ◽  
Halimah Mohamed Kamari ◽  
Mohd Hafiz Mohd Zaid ◽  
Noramaliza Mohd Noor ◽  
...  
Keyword(s):  
Optical Properties ◽  
Excited States ◽  
Visible Region ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Melt Quenching ◽  
Laser Applications ◽  
X Ray ◽  
Lithium Aluminium ◽  
Prepared Glass

In this study, a series of Li2O-Al2O3-B2O3 glasses doped with various concentrations of Dy2O3 (where x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0 mol%) were prepared by using a conventional melt-quenching technique. The structural, physical and optical properties of the glasses were examined by utilising a variety of techniques instance, X-ray diffraction (XRD), UV–Vis-NIR spectrometer, Fourier transform infrared (FTIR) and photoluminescence (PL). The XRD spectra demonstrate the amorphous phase of all glasses. Furthermore, the UV-vis-NIR spectrometers have registered optical absorption spectra a numbers of peaks which exist at 1703, 1271, 1095, 902, 841, 802, 669, 458, 393 and 352 nm congruous to the transitions from the ground of state (6H15/2) to different excited states, 6H11/2, 6F11/2 + 6H9/2, 6F9/2 + 6H7/2, 6F7/2, 6F5/2, 6F3/2, 4F9/2, 4I15/2, 4F7/2 and 6P7/2, respectively. The spectra of emission exhibit two strong emanation bands at 481 nm and 575 nm in the visible region, which correspond to the transitions 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2. All prepared glass samples doped with Dy2O3 show an increase in the emission intensity with an increase in the concentration of Dy3+. Based on the obtained results, the aforementioned glass samples may have possible applications, such as optical sensor and laser applications.

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 Optical Properties of Erbium Doped Borotellurite Glass System

2015 ◽  
Vol 1112 ◽  
pp. 7-10 ◽  
Author(s):  
Mohamed Kamari Halimah ◽  
M.N. Azlan ◽  
S.Z. Shafinas
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Molar Volume ◽  
X Ray Diffraction ◽  
Melt Quenching ◽  
X Ray ◽  
Erbium Doped ◽  
Amorphous Nature ◽  
Quenching Method ◽  
Xrd Method

Erbium doped zinc borotellurite glasses were prepared by using melt-quenching method. The structural properties of the glass samples were determined by using x-ray diffraction (XRD) method and was confirmed its amorphous nature. The density and molar volume is shown to be increased with increasing content of erbium. The refractive index is found to be increased with increasing content of erbium.

scholarly journals Morphology and Magnetic Properties of Ferriferous Two-Phase Sodium Borosilicate Glasses

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Alexander Naberezhnov ◽  
Nadezda Porechnaya ◽  
Viktor Nizhankovskii ◽  
Alexey Filimonov ◽  
Bernard Nacke
Keyword(s):  
Magnetic Properties ◽  
Iron Oxides ◽  
Channel Structure ◽  
Borosilicate Glasses ◽  
Melt Quenching ◽  
Two Phase ◽  
Furnace Charge ◽  
Self Assembling ◽  
Quenching Method ◽  
Drop Structure

This contribution is devoted to the study of morphology and magnetic properties of sodium borosilicate glasses with different concentrations (15, 20, and 25 wt.%) ofα-Fe2O3in an initial furnace charge. These glasses were prepared by a melt-quenching method. For all glasses a coexistence of drop-like and two-phase interpenetrative structures is observed. The most part of a drop structure is formed by self-assembling iron oxides particles. All types of glasses demonstrate the magnetic properties and can be used for preparation of porous magnetic matrices with nanometer through dendrite channel structure.

scholarly journals Up- and Downconversion Luminescence Properties of Nd3+Ions Doped in Bi2O3–BaO–B2O3Glass System

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
R. Ruamnikhom ◽  
P. Limsuwan ◽  
M. Horprathum ◽  
N. Chanthima ◽  
H. J. Kim ◽  
...  
Keyword(s):  
Radiative Decay ◽  
Excited State Absorption ◽  
Upconversion Emission ◽  
Luminescence Properties ◽  
Barium Borate ◽  
Melt Quenching ◽  
Strong Fluorescence ◽  
Nir Emission ◽  
Quenching Method ◽  
Barium Borate Glass

Physical, optical, and luminescence properties of Nd3+ions in bismuth barium borate glass system were studied. The glasses prepared by a melt quenching method were doped at various Nd2O3concentrations in compositions (40-x)B2O3 : 40Bi2O3 : 20BaO : xNd2O3(wherex= 0.00, 0.50, 1.00, 1.50, 2.00, and 2.50 in mol%). Luminescence properties of the glasses were studied under two excitations of 585 and 750 nm for downconversion. From both excitations, the results show emission bands in NIR region corresponding to the transitions between4F3/2 → 4I9/2(900 nm),4F3/2 → 4I11/2(1,060 nm), and4F3/2 → 4I13/2(1,345 nm). The luminescence intensity obtained with 585 nm excitation was stronger than 750 nm, with the strongest NIR emission at 1,060 nm. The upconversion emission spectrum exhibits strong fluorescence bands in the UV region at 394 nm (λex=591 nm). The processes are associated with excited state absorption (ESA) from4F3/2level to4D3/2level and it is the radiative decay from the4D3/2to ground levels (4D3/2 → 4I13/2) which are responsible for the emission at 394 nm.

Structural and Optical Properties of Pure NiO Nanoparticles and NiO-Mn2O3, NiO-CdO, NiO-Pb2O3, NiO-ZnO Nanocomposites

2021 ◽  
Vol 14 (5) ◽  
pp. 409-417
Keyword(s):  
Nickel Oxide ◽  
Green Emission ◽  
Hexagonal Structure ◽  
Precipitation Method ◽  
Nio Nanoparticles ◽  
Structural And Optical Properties ◽  
Suitable Material ◽  
Structure Morphology ◽  
Average Grain Size ◽  
Co Precipitation

Abstract: Pure nickel oxide (NiO) nanoparticles and NiO-Mn2O3, NiO-CdO, NiO-Pb2O3, NiO –ZnO nanocomposites were synthesized by co-precipitation method. The PXRD studies revealed that NiO, Mn2O3 and CdO possessed cubic structure, Pb2O3 possessed monoclinic structure, ZnO possessed hexagonal structure and confirmed the presence of polycrystallinity nature of NiO and Mn2O3, CdO, Pb2O3, ZnO in the nanocomposites. The average grain size of NiO nanoparticles was found to be 30.10 nm using Debye Scherer’s formula. The FESEM images of NiO nanoparticles and their nanocomposites revealed spherical shaped structure and NiO-Pb2O3 revealed needle shaped rod-like structure. EDAX analysis confirmed the composition of NiO nanoparticles and their nanocomposites. Raman spectra exhibited characteristic peaks of pure NiO and that of NiO- Mn2O3, NiO-CdO, NiO- Pb2O3, NiO-ZnO in the synthesized nanocomposites. In the PL spectra, blue and green emission was observed in the samples. UV-vis spectra revealed the absorption peaks of NiO nanoparticles and their nanocomposites. Thus, the synthesized NiO- Mn2O3, NiO-CdO, NiO - Pb2O3 and NiO-ZnO nanocomposites can be a suitable material for electrocatalysis applications. Keywords: Nickel oxide nanocomposites, Structure, Morphology, Absorption, Luminescence.

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