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 Effect of Neodymium Concentration on Structural and Optical Properties of Tellurite Based Glass System

2016 ◽  
Vol 846 ◽  
pp. 183-188 ◽  
Author(s):  
M.N. Azlan ◽  
Mohamed Kamari Halimah ◽  
S.O. Baki ◽  
W.M. Daud
Keyword(s):  
Optical Properties ◽  
Diffraction Method ◽  
Transmission Band ◽  
Glass System ◽  
X Ray Diffraction ◽  
X Ray ◽  
Amorphous Nature ◽  
Neodymium Concentration ◽  
Quenching Method ◽  
Xrd Method

Neodymium doped zinc borotellurite glass system were fabricated by using conventional melt-quenching method. The structural properties of the glass system were characterized by using X-ray Diffraction (XRD) method and Fourier Transform analysis (FTIR). The amorphous nature of the glass system was confirmed by using x-ray diffraction method. The transmission band of TeO3 structural units which indicate the existence of non-bridging oxygen was shown by FTIR analysis. The optical properties of the glass system were determined by using UV-Vis spectrophotometer. Several bands were shown in the absorption spectra which indicate the characteristic of neodymium ions. The obtained values of indirect optical band gap, Eopt lies in the range of 3.151 eV and 3.184 eV.

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%.

Structural Properties of Erbium Doped Tellurite Glass Embedded with Natural Ferrite Oxide Nanoparticles

2017 ◽  
Vol 268 ◽  
pp. 177-180 ◽  
Author(s):  
Puzi Anigrahawati ◽  
Md Rahim Sahar
Keyword(s):  
Wave Number ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Raman Spectroscopic ◽  
Trigonal Bipyramidal ◽  
Erbium Doped ◽  
Amorphous Nature ◽  
Glassy Materials ◽  
Quenching Method

Natural ferrite oxide nanoparticles (NPs) embed with tellurite glasses ((89-x) TeO2-10ZnO-1Er2O3-(x)Fe3O4, (x = 0 – 0.8 mol %)) were prepared by conventional melt quenching method to study the influence of the Fe3O4 NPs concentration on the stuctural properties of the glass. Studies on these glassy materials characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and RAMAN spectroscopic measurements are presented. It is observed that the amorphous nature of the glass is confirmed by x-ray diffraction. The FTIR studies support the formation of Te-O-Fe linkages. The FTIR spectra reveal modification in network structures evidenced from vibrational wave-number shifts of TeO4 and TeO3 structural units. Raman spectroscopy have been manipulated to observe the structural modification of [TeO4] trigonal bipyramidal structural unit.

STRUCTURAL CHARACTERIZATION OF SULFOBORATE GLASSES CONTAINING MAGNESIUM OXIDE

2016 ◽  
Vol 78 (6-11) ◽  
Author(s):  
S. A. Dalhatu ◽  
R. Hussin ◽  
Karim Deraman
Keyword(s):  
Molar Volume ◽  
Alkaline Earth ◽  
X Ray Diffraction ◽  
X Ray ◽  
Infra Red ◽  
Amorphous Nature ◽  
Quenching Method ◽  
The Fourier Transform ◽  
Glass Compositions

Magnesium sulfoborate glasses of different compositions were prepared using melt quenching method with the purpose of using it for optical properties. The Fourier Transform Infra-red (FTIR) Spectroscopy, Nuclear Magnetic Resonance (NMR) and X-Ray Diffraction (XRD) have been carried out. Density and molar volume have been evaluated and analysed. From the results of XRD, the absent of discrete and continuous sharp peaks confirmed the amorphous nature of the glass compositions while the results from both FTIR and NMR revealed the existence of BO3, BO4 units. Addition of MgO to sulfoborate influenced the conversion of the dominant BO3 groups to BO4 groups. The BO4 groups are known for creating complex defects that transform into that stable trap good for optical phenomena. It was observed that the density of glass increases while the molar volume is decreases with respect to increase in concentration of alkaline earth oxide in the glass compositions.

Physical and Structural Properties of Dysprosium Doped Barium Borate Glass

2019 ◽  
Vol 290 ◽  
pp. 46-52 ◽  
Author(s):  
Norihan Yahya ◽  
Mardhiah Abdullah ◽  
Mohamed Najmi Naquib Mohamed Zainal Abidin ◽  
Azman Kasim ◽  
Azhan Hashim
Keyword(s):  
Molar Volume ◽  
Structural Properties ◽  
Borate Glass ◽  
Glass Network ◽  
Barium Borate ◽  
X Ray Diffraction ◽  
Melt Quenching ◽  
X Ray ◽  
Amorphous Nature ◽  
Barium Borate Glass

Five distinguish glass samples were prepared by melt quenching technique of the composition (81-x)H3BO3-19BaCO3-xDy2O3 with x = 0, 0.2, 0.4, 0.6 and 0.8 mol%. The effect of Dy3+ to the barium borate glass can be investigated in terms of their physical properties such as density, molar volume and oxygen packing density. The structural properties were analyzed by X-Ray Diffraction (XRD) technique and Fourier Transform Infrared Spectroscopy (FTIR). The result revealed that the increment of mol% of Dy3+ in the compound generally will increases the density and molar volume of the glass samples. The amorphous nature of the glass system was verified from the XRD spectra pattern. Meanwhile, the FTIR spectra shown the presence of Ba2+, BO3, BO4, B-O-B linkage, H-O-H and isolated borate in the glass network.

The Preparation and Physical Characteristic of Sm3+ Doped Borotellurite Glass

2016 ◽  
Vol 846 ◽  
pp. 69-74 ◽  
Author(s):  
M.R.S. Nasuha ◽  
K. Azman ◽  
H. Azhan ◽  
S.A. Senawi ◽  
Mardhiah Abdullah
Keyword(s):  
Physical Properties ◽  
Molar Volume ◽  
Potential Candidate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Prepared Glass ◽  
Amorphous Nature ◽  
Compositional Changes ◽  
Optical Applications ◽  
Quenching Method

Borotellurite glasses were generally applied in rare earth optical materials due to their excellent physical properties. Samarium doped borotellurite glasses have been identified as one of the potential candidate for optical applications. Therefore, the aim of this study is to identify the physical properties of Sm3+ doped borotellurite glasses by mean of their density, molar volume, microhardness and X-ray diffraction. In this study, the Sm3+ doped borotellurite glasses of the system (70-x)TeO2-20B2O3-10ZnO-xSm2O3 as the samarium trioxide varies from (x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol%) have been prepared by melt-quenching method. The amorphous nature of the prepared glass samples have been confirmed through XRD spectral analysis. The values of density are found to vary from 4.541g/cm3 to 4.837g/cm3 as well as the values of molar volume as it varies from 29.118cm3/mol to 28.314cm3/mol with the increase of Sm3+ content. The physical properties corresponding to compositional changes have been analysed and the result are reported and presented.

Luminescence Studies of Erbium Doped Sodium Magnesium Boro-Tellurite Glass

2017 ◽  
Vol 268 ◽  
pp. 38-42
Author(s):  
Nur Liyana Amiar Rodin ◽  
Md Rahim Sahar
Keyword(s):  
Tellurite Glass ◽  
Emission Spectra ◽  
X Ray Diffraction ◽  
Melt Quenching ◽  
Xrd Pattern ◽  
X Ray ◽  
Erbium Doped ◽  
Amorphous Nature ◽  
Sodium Magnesium ◽  
Schematic Energy Level Diagram

The optical behaviour of Er3+ (1.0 – 2.0 mol %) doped B2O3-TeO2- Na2O-MgO glasses synthesized by conventional melt-quenching technique was studied through luminescence measurements. The X-ray diffraction (XRD) pattern confirms the amorphous nature of the glasses without the existence of any sharp peak. The emission spectra at 378 nm excitation displayed three emission peaks corresponding to 2H11/2-4I15/2, 4S3/2-4I15/2 and4I9/2-4I15/2 transitions. Hence, a schematic energy level diagram was proposed. The luminescence properties of the prepared glasses was found to be strongly affected by varying the concentration of Er3+ ions.

Influence of NiO Nanoparticles on Magnetic Properties of Neodymium Doped Tellurite Glasses

2017 ◽  
Vol 268 ◽  
pp. 102-105 ◽  
Author(s):  
Md Rahim Sahar ◽  
Nur Amanina Mat Jan
Keyword(s):  
Room Temperature ◽  
X Ray Diffraction ◽  
Initial Curve ◽  
Melt Quenching ◽  
X Ray ◽  
Transmission Electron ◽  
Amorphous Nature ◽  
Quenching Method ◽  
Nio Nps ◽  
The Magnetic Field

Series of glass samples with composition (72.5-x)TeO2-15MgO-10Na2O-2.5Nd2O3-xNiO where 1.0 ≤ x ≤ 2.5 mol% are prepared using melt quenching method. The glasses are characterized via X-ray diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The XRD spectra confirmed the amorphous nature of prepared glasses. TEM images manifest the existence of NiO NPs which are homogeneously distributed in the glass matrix. The magnetization M(H) curve reveals that the glass displays an anomalous hysteresis behavior at room temperature. It is observed that M(H) is dependent on the NiO content. The initial curve of magnetization lies positively as a function of the magnetic field under 1000 H (O.e).

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.

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