Article
Materials Science, Multidisciplinary
N. Sreeram, S. Yusub, A. Ramesh Babu, M. Venkateswarlu, G. Krishna Priya, V. Aruna, Ravindranadh Koutavarapu
Summary: The dielectric, physical, and optical properties of 5GeO2-30Li2O-55P2O5-(10-x)MgO-xCr2O3 (x varies from 0 to 0.9 mol%) glasses were investigated. The non-crystalline behavior of these glasses was analyzed using X-ray diffraction. The compact nature of the glasses was indicated by their physical parameters. The optical absorption spectra showed the presence of Cr3+ ions and the optical band gap and Urbach energy of the glasses were evaluated. Fourier-transform infrared and Raman spectra supported the structural changes in the glasses, while the emission and ESR spectra confirmed the presence of chromium ions.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Mohammed A. Algradee, Y. H. Elbashar, Abduelwhab B. Alwany, H. H. Hassan, R. El-Mallawany
Summary: Li2O-ZnO-P2O5 (LZP) glasses doped with Yb2O3 were synthesized using the melt quenching technique, and their optical and physical properties were investigated. The doping of Yb2O3 was found to have an effect on various parameters studied in this research.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Physical
S. Pershina
Summary: The thermal properties, crystallization kinetics, phase composition, and impact of Al2O3 addition on the properties of lithium germanophosphate glasses in Li2O-Al2O3-GeO2-P2O5 system were investigated. The structure of the glasses was studied by IR spectroscopy, showing modification in the phosphate part of the glass structure. The undoped glass had lower conductivity compared to the Al-doped solid electrolytes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Multidisciplinary
Birampally Kalyani, Navaneetha Pujari, Avula Edukondalu, M. Srinivasa Reddy, C. P. Vardhani
Summary: New Li2O-based oxide glasses containing heavy metal oxide in the PbO-As2O3-B2O3-Li2O quaternary system were prepared and analyzed using impedance spectroscopy and the Cole-Cole impedance reaction method. The AC conductivity of the glasses was studied in the frequency range of 100 Hz to 1 MHz, and the dielectric constant and dielectric loss were investigated as functions of temperature. The presence of PbO was found to decrease the DC conductivity and increase the energy of activation, possibly due to reduced charge fraction on the oxygen atoms and the presence of a lone electron pair in the lead atom, which hinder the passage of lithium ions.
CHINESE JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
M. Al-Zaibani, A. Shahboub, R. M. Ramadan, A. Altawaf, E. F. El Agammy
Summary: The study on (50-x)Li2O•xFe2O3•50P2O5 glasses revealed that increasing Fe2O3 content leads to higher hardness, chemical durability, and density, with the influence of Fe ions depending on their concentration. The predominant conduction mechanism in these glasses is ionic conduction by Li+ ions.
Article
Materials Science, Ceramics
Amin Abd El-Moneim, R. El-Mallawany, Yasser B. Saddeek
Summary: The elastic properties of xNb(2)O(5)-(1-x)TeO2 and 0.5xNb(2)O(5)-0.5xLi(2)O-(1-x)TeO2 glass systems were evaluated to understand the structural role of Nb2O5 and Li2O in the tellurite network. When Nb2O5 is added, NbO6 structural units and strong Te-O-Nb linkages are formed, leading to an increase in elastic moduli of the glass system. The discrepancy between experimental and theoretical results was attributed to the structural units formed in the tellurite network when TeO2 is substituted by Nb2O5 and Li2O.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Multidisciplinary
Navaneetha Pujari, Kalyani Birampally, Avula Edukondalu, C. P. Vardhani
Summary: Arsenate-based alkali borotellurite glasses were formulated and studied for their properties. The results showed that the borate network structure was affected by the replacement of TeO2 by Li2O, leading to a decrease in density and molar volume, and an increase in glass transition temperature with increasing Li2O content.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Physics, Multidisciplinary
A. Tozri, M. Al-Zaibani, A. Shahboub, E. F. El Agammy
Summary: The study found phase separation in glass samples containing Sb2O3 concentration of 25 mol% or higher, with formation of crystalline phases like Li5Sb3O8 and Li3SbO4 after thermal treatment. Sb2O3 contributed negatively to N (4) by forming phases with Li2O, causing an increase in conductivity with free volume.
Article
Materials Science, Multidisciplinary
Hiroto Yamaguchi, Masanori Koshimizu, Hiroki Kawamoto, Yutaka Fujimoto, Genichiro Wakabayashi, Keisuke Asai
Summary: In this study, Dy3+-doped Li2O-CaO-P2O5 glasses were fabricated using 6Li or nLi isotopes and their thermoluminescent properties were investigated for neutron detection. The results showed similar sensitivities to X-rays for nLi and 6Li glasses, with TL glow peaks observed at 366 K. Furthermore, the TL intensity of the 6Li glass was significantly higher than that of the nLi glass after neutron irradiation, indicating efficient TL induction through the 6Li (n, alpha)3H reaction. Additionally, a good linear correlation was observed between thermal neutron fluence and TL intensity in the range of 1.0 x 106-1.0 x 1011 neutrons/cm2. These glasses are expected to be useful for TL dosimetry in X-rays, gamma rays, and thermal neutrons.
Article
Materials Science, Ceramics
M. Monisha, Nimitha S. Prabhu, Ashwitha Nancy D'Souza, Suresh Bharadwaj, R. J. Chowdary, M. I. Sayyed, Abdullah M. S. Alhuthali, Y. Al-Hadeethi, Sudha D. Kamath
Summary: A series of Tm3+ doped lithium sodium barium borate glasses were prepared and characterized for their structural, optical, and luminescence properties. The glasses showed potential for blue laser application with high experimental branching ratio and low color temperature values.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Ekaterina Koroleva, Ilya Reshetov, Ekaterina Babich, Sergey Vakhrushev, Dmitry Tagantsev, Andrey Lipovskii
Summary: Broadband dielectric spectroscopy (BDS) was used to investigate polarization phenomena in alkaline silicate glasses. A consistent model of poled glasses was proposed and it was found that the electric properties of the polarized layers depend on the structure of the anodic electrode.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Bingyan Liu, Zhongli Zhu
Summary: The structure, luminescence, and magneto-optical properties of paramagnetic magneto-optical glasses (GBLM) doped with various concentrations of Tb3+ ions were investigated. The density and effective doping concentration of Tb3+ ions in the GBLM glass were found to be 5.87 g/cm3 and 13.58 x 1021 /cm3, respectively, when the doping concentration of Tb2O3 was 40 mol%. The GBLM glasses exhibited excellent magneto-optical properties, with a Verdet constant of -158.56 rad/(T center dot m) at 273.15 K and -143.04 rad/(T center dot m) at 298.15 K when doped with 40 mol% Tb2O3, outperforming Terbium Gallium Garnet Crystal (TGG) (-134 rad/(T center dot m)). The GBLM glass also emitted bright green light near 544 nm due to the 5D4-*7F5 energy level transition of Tb3+. These results suggest a promising application prospect for GBLM magneto-optical glass in optical isolators.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
So-Won Kim, Hwan-Seok Lee, Deok-Sung Jun, Seong-Eui Lee, Joung-Ho Lee, Hee-Chul Lee
Summary: To develop plasma-resistant glass materials suitable for semiconductor etching processes, alkaline earth oxides (ROs) were introduced into a Li2O-Al2O3-SiO2 (LAS) glass. Among the analyzed materials, the LAS material in which Li2O was partially replaced by MgO (MLAS) exhibited the most favorable characteristics, including low dielectric constant and thermal expansion coefficient. MLAS demonstrated the slowest etching speed when exposed to CF4/O-2/Ar plasma, indicating exceptional plasma resistance. X-ray photoelectron spectroscopy analysis revealed that the presence of Mg2+ ions in the plasma discharge inhibits the migration of Li+ ions towards the surface, contributing to the excellent plasma resistance of MLAS.
Article
Materials Science, Multidisciplinary
Zahra Ashur Said Mahraz, Siti Aishah Jupri, E. S. Sazali, M. R. Sahar, K. A. Samah
Summary: Europium oxide doped lithium tellurite glasses were prepared, and the effects of Eu2O3 doping on the physical, electrical, and optical properties of the glasses were investigated. The results showed that the conductivity, activation energy, and dielectric constant increased with an increase in Eu2O3 concentration. The spectroscopic analysis revealed intense emission peaks at specific wavelengths in the doped glasses. These findings have implications for the development of advanced optoelectronic devices.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Optics
Dalal Abdullah Aloraini, Ashok Kumar, Aljawhara H. Almuqrin, M. Sayyed
Summary: The study investigated the impact of introducing SrO, TeO2, PbO, and Bi2O3 heavy metal oxides on the optical and gamma ray shielding properties of Li2O-K2O-B2O3 glasses. The results showed an increase in energy band gap values and a decrease in refractive index, dielectric constant, and optical dielectric constant with the presence of these oxides. The mass attenuation coefficient (MAC) was found to be highly dependent on the chosen oxides, with significant variations at low energies.