scholarly journals Investigations on Structural and Optical Properties of Various Modifier Oxides (MO = ZnO, CdO, BaO, and PbO) Containing Bismuth Borate Lithium Glasses

2021 ◽  
Vol 5 (12) ◽  
pp. 308
Author(s):  
J. Bhemarajam ◽  
P. Syam Prasad ◽  
M. Mohan Babu ◽  
Mutlu Özcan ◽  
M. Prasad
Keyword(s):  
Optical Absorption ◽  
Molar Volume ◽  
Molar Mass ◽  
Urbach Energy ◽  
Mass Density ◽  
Glass Network ◽  
Structural And Optical Properties ◽  
Absorption Data ◽  
Amorphous Nature ◽  
Ft Ir

Bismuth based quaternary glasses with compositions BiBLM: 50Bi2O3–20B2O3–15Li2O–15MO (where MO = ZnO, CdO, BaO, and PbO) were processed by conventional melt quenching. The effectiveness of various modifier oxides on the optical and structural properties of the developed glasses was studied systematically by XRD, DSC, FTIR, Raman, and optical absorption (OA) measurements. The synthesized glass specimens were characterized by XRD and the patterns demonstrated an amorphous nature. The physical characteristics such as molar mass, density, and OPD values were found to increase with an increase in the molar mass of the modifier oxides, while there was a decrement in oxygen molar volume, thus resulting in decrement of complete molar volume of the prepared glasses. From DSC analysis, incorrigible reduction and enhancement of Tg and thermal stability among various modifier oxides in the glass network was noticed. Optical absorption data for glass specimens have confirmed the decrease in both direct and indirect optical band gap values among various modifier oxides incorporation. These investigations support the obtained Urbach energy (UE) and metallization criteria of synthesized glasses. The ionic characteristic for the glass specimens were confirmed by the values of electronic polarizability and electronegativity. The Raman and FT-IR spectra of the glass specimens displayed the existence of BiO3, BiO6, ZnO4, CdO4, BaO4, BO3, PbO4, and BO4 structural units within the glass matrix. These structural results can support the applications of as-developed glasses in the area of photonics.

scholarly journals Optical and thermal properties of TeO2–B2O3–Gd2O3 glass systems

2019 ◽  
Vol 37 (4) ◽  
pp. 517-525
Author(s):  
C. Eevon ◽  
M.K. Halimah ◽  
M.N. Azlan ◽  
R. El-Mallawany ◽  
S.L. Hii
Keyword(s):  
Thermal Properties ◽  
Room Temperature ◽  
Optical Band Gap ◽  
Urbach Energy ◽  
Glass Network ◽  
X Ray Diffraction ◽  
X Ray ◽  
Amorphous Nature ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

AbstractNew glass samples with composition (1 – x)[(TeO2)70(B2O3)30] – x(Gd2O3) with x = 0.2, 0.4, 0.6, 0.8 and 1.0 in mol% have been synthesized by conventional melt-quenching techniques. X-ray diffraction (XRD) studies were performed in order to confirm the amorphous nature of the samples. The density of the samples has been found to vary with the Gd2O3 content, whereas an opposite trend has been observed in the molar volume. The analysis of Fourier Transform Infrared (FT-IR) spectroscopy of the samples showed that the glass network is mainly built of TeO3, TeO4, BO3 and BO4 units. The addition of Gd2O3 changed the refractive index, optical band gap and Urbach energy of the glass samples. The thermal properties of the studied glasses were investigated by measuring the thermal diffusivity of the samples by using photoflash method at room temperature.

Effect of Samarium Ions on Physical and Optical Properties of Zinc Borotellurite Glass System

2021 ◽  
Vol 317 ◽  
pp. 100-108
Author(s):  
Siti Nasuha Mohd Rafien ◽  
Azman Kasim ◽  
Norihan Yahya ◽  
Azhan Hashim ◽  
Wan Aizuddin Wan Razali
Keyword(s):  
Optical Properties ◽  
Band Gap ◽  
Molar Volume ◽  
Optical Band Gap ◽  
Urbach Energy ◽  
Glass System ◽  
X Ray Diffraction ◽  
Indirect Transition ◽  
Vis Spectroscopy ◽  
Amorphous Nature

Modifying the physical and optical properties of zinc borotellurite glasses by controlling rare earth (RE) doping is important in order to obtain high quality glass. In this study, Samarium (Sm3+) doped zinc borotellurite glasses were successfully fabricated by using conventional melt-quenching technique with chemical composition (where x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol%). The physical properties by mean of their density as well as molar volume were measured while the optical properties have been studied through UV-Vis spectroscopy in order to determine the optical band gap (Eopt) and Urbach energy (ΔΕ) of the glass system. Optical absorption spectra of the glass samples were recorded in the range 350 nm - 750 nm at room temperature. The amorphous nature of the glass was confirmed from X-ray diffraction techniques. The density and molar volume of the glass samples were found to vary with respect to Sm3+ ions content. The value of optical band gap, Eopt lies between 2.605 eV to 2.982 eV for the direct transition and 2.768 eV to 3.198 eV for the indirect transition respectively. Meanwhile, the Urbach energy, ΔE was observed in the range of 0.112 eV to 0.694 eV respectively. The physical and optical properties were found to be strongly affected by the varying concentration of Sm3+ ions. Some other results will be analysed and discussed in detail.

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.

Growth of Au Nanoparticles Stimulate Spectroscopic Properties of Er3+ Doped TeO2-ZnO-Na2O Glasses

2014 ◽  
Vol 895 ◽  
pp. 254-259 ◽  
Author(s):  
Asmahani Awang ◽  
Sib Krishna Ghoshal ◽  
M.R. Sahar ◽  
M. Reza Dousti ◽  
Fakhra Nawaz
Keyword(s):  
Heat Treatment ◽  
Optical Absorption ◽  
Room Temperature ◽  
Au Nanoparticles ◽  
Optical Band Gap ◽  
Urbach Energy ◽  
Spectroscopic Properties ◽  
Au Nps ◽  
Amorphous Nature ◽  
Gold Nps

The changes in optical properties of 70TeO2-20ZnO-10Na2O-0.5Er2O3-0.2Au glass system are stimulated by varying the heat treatment duration. The XRD data reveals broad humps in range of 25-35 degree representing the amorphous nature of the glass materials. The optical absorption edge at room temperature is used to estimate the direct (Edir), indirect (Eindir) optical band gap and the Urbach energy (EU). The value of Edirlies between 2.937 to 2.943 eV, while the value of Eindirlies within 2.478 to 2.502 eV. The value of EUis found to increase with longer time of heat treatment and lies between 0.409 to 0.424 eV. The characteristic surface plasmon resonance (SPR) band of Au nanoparticles (NPs) was observed at ~630 nm of optical absorption spectra. The strong and medium green upconversion (UC) fluorescence from Er3+centred at 547 and 533 nm were observed at room temperature, in addition to a weak red UC fluorescence from Er3+centred at 637 nm. The SPR stimulated by the presence of Au NPs enhanced the luminescence intensity by four and five folds for 1 and 4 hours heat treatment, respectively. The results indicate that there is a large influence of growth of gold NPs on the optical and spectroscopic properties of glass samples. Our results may be useful for the fabrication of nanophotonic materials.

scholarly journals Physical, Optical, and Spectroscopic Studies on MgO-BaO-B2O3 Glasses

ISRN Ceramics ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Samdani ◽  
Md. Shareefuddin ◽  
G. Ramadevudu ◽  
S. Laxmi Srinivasa Rao ◽  
M. Narasimha Chary
Keyword(s):  
Optical Absorption ◽  
Urbach Energy ◽  
Glass Composition ◽  
Glass Network ◽  
Spectroscopic Studies ◽  
Band Gaps ◽  
Compositional Dependence ◽  
Paramagnetic Resonance ◽  
Optical Band Gaps ◽  
Electron Paramagnetic

The mixed alkaline effect in double alkaline borate glasses MgO-BaO-B2O3 containing small proportions of copper oxide (CuO) has been studied. The glass samples are characterized by optical absorption, electron paramagnetic resonance (EPR), and Fourier transform infrared spectroscopy (FTIR). A red shift in optical absorption peaks with increasing MgO (decreasing BaO) concentration has been observed. The values of “g” tensor and hyperfine “A” tensor have shown inflections with glass composition. The number of spins (N) and paramagnetic susceptibility (χ) also exhibited mixed alkaline effect. The broadening of glass network with increase in MgO concentration is found from the FTIR spectra. Interestingly both density and molar volume have shown decreasing trend with glass composition. The optical band gaps exhibited a nonlinear compositional dependence. As expected, the glass samples possessed higher values of optical basicity (Λ), molar electronic polarizability (αm), and Urbach energy (ΔE).

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.

Structural and optical investigations of CdO-Na2CO3-H3BO3 glasses

2015 ◽  
Vol 93 (7) ◽  
pp. 796-801 ◽  
Author(s):  
Shaweta Mohan ◽  
D.P. Singh ◽  
Simranpreet Kaur
Keyword(s):  
Refractive Index ◽  
Optical Absorption ◽  
Ftir Spectroscopy ◽  
Absorption Spectra ◽  
Urbach Energy ◽  
Optical Absorption Spectra ◽  
Melt Quenching ◽  
Amorphous Nature ◽  
Mobility Gap

Glasses with composition xCdO-(40-x) Na2CO3-60H3BO3; x = 10, 20, 30 and 40 mol% were prepared by conventional melt-quenching technique and checked by XRD technique for their amorphous nature. An increase in density and refractive index of the samples with an increase in content of CdO has been observed and discussed. The optical absorption spectra of the glasses were recorded in the range 200–1100 nm and was used to find optical mobility gap, Urbach energy, and cut-off wavelength for each sample. The decrease in optical mobility gap with increase in CdO points towards the compactness of the structure with the addition of CdO. FTIR spectroscopy reveals the presence of trigonal and tetrahedral borate units, and the results indicate the conversion of BO3 to BO4 units with the increase in CdO content.

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.

scholarly journals Effect of Stepwise Replacement of Non-Oxide to Oxide Group on Structural Properties of Bi2O3·LiF·B2O3 Glasses

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Susheel Arora ◽  
Virender Kundu ◽  
D. R. Goyal ◽  
A. S. Maan
Keyword(s):  
Ftir Spectroscopy ◽  
Molar Volume ◽  
Glass Network ◽  
Absorption Bands ◽  
Network Modifier ◽  
Xrd Pattern ◽  
Amorphous Nature ◽  
Oxide Group ◽  
Quench Method

Bismuth fluoroborate glasses with compositions xBi2O3·(40 − x)LiF·60 B2O3 (x = 0, 5, 10, 15, and 20) are synthesized by melt-quench method. XRD pattern is obtained for all the samples to confirm their amorphous nature. FTIR spectroscopy is carried out for the reported samples. It reflects the effect of replacement of a non-oxide group (LiF) with an oxide group (Bi2O3) in the glass network, due to the presence of the various absorption bands and their shifting with such replacement, assigning a role of network modifier to Bi2O3. Density and molar volume show an increase in their values with increase in Bi2O3 concentration. Theoretical optical basicity is calculated for the reported samples, which shows a decreasing trend with the increasing concentration of Bi2O3.

scholarly journals Compositional Effect of Barium Ions (Ba2+) on Ultrasonic, Structural and Thermal Properties of Lead Borate Glasses

2019 ◽  
Vol 9 (1) ◽  
pp. 481-485
Keyword(s):  
Elastic Moduli ◽  
Molar Mass ◽  
Ftir Analysis ◽  
Structural Units ◽  
Barium Ions ◽  
Characteristic Temperatures ◽  
Amorphous Nature ◽  
Ft Ir ◽  
Dta Studies ◽  
Lower Molar

Glasses of the formula 68B2O3 -(32-x)PbO-xBaO (0≤ x ≤ 12) were synthesized by standard melt quench technique and investigated their properties using XRD, ultrasonic, FT-IR and DTA studies. No sharp peaks are existing in the XRD spectra and the broad halo appeared around 2θ≈30o , which reflects the characteristics of amorphous nature. Density decreases due to the replacement of higher molar mass by lower molar mass. The ultrasonic velocity varies with the gradual substitutions of barium ions in leadborate host glass matrix. The variations in elastic moduli such as L, G, K and E), Poisson’ sratio(), acoustic impedance(Z), microhardness (H) and Debye temperature (θD)were observed which resulted in compact glasses. The functional groups of prepared glasses were studied by FTIR analysis and BO4 structural units enhanced with decreasing BO3 structural units. Characteristic temperatures of DTA increase because of the higher bond strength of barium ions and also strength of the glasses.

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