Article
Materials Science, Multidisciplinary
Mohammed A. Algradee, Emran Eisa Saleh, O. M. Samir, Abduelwhab B. Alwany, Tharwat M. El-Sherbini
Summary: This study prepared glasses doped with Nd2O3 and investigated their physical, structural, and optical properties. It was found that the optical gap energies increased with the addition of Nd3+ ions. The results also showed that the LiZnSiP:4Nd glass sample provided the best protection against gamma and neutron radiation.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
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
Materials Science, Multidisciplinary
Ebrahim A. Mahdy, S. Ibrahim, H. A. Abo-Mosallam
Summary: Glasses based on the Li2O-Fe2O3-In2O3-Bi2O3-P2O5 system were prepared and the modifications of the glass structure were investigated by substituting Bi2O3/P2O5. The results showed that the addition of Bi2O3 promoted the polymerization of phosphate chains and the formation of P-O-Bi bonds, leading to an increase in transition and softening temperatures, and a decrease in coefficient of thermal expansion. The glasses also exhibited improved dissolution stability.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
M. S. Shams, Y. S. Rammah, F. I. El-Agawany, R. A. Elsad
Summary: New phosphate-based glasses containing different amounts of cadmium were synthesized and studied for their physical, structural, and dielectric properties. Among them, the glass sample PLZC40 with 40 mol% of CdO exhibited the best shielding capacity compared to the other samples.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Refka Oueslati-Omrani, Aymen Agrebi, Ismail Khattech, Ahmed Hichem Hamzaoui
Summary: The effect of ZnO on the structural investigations and calorimetric dissolution of Li2OxZnO-P2O5 glass system was explored. The addition of ZnO increased the density, refractive index, glass transition, and crystallization temperatures. ZnO induced the formation of non-bridging oxygen (NBOs), resulting in the depolymerization of phosphate chains. The optical band gap values increased with the increase in ZnO content. The enhancement of chemical durability was attributed to the strengthened resistance against water attack and the low mobility of Zn2+ cations. Microcalorimetric investigations showed a decrease in heat dissolution enthalpy, which was correlated to the shortening of phosphate chains.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
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
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
Engineering, Electrical & Electronic
J. L. N. Galvez-Sandoval, E. Gonzalez-Suarez, A. N. Meza-Rocha, A. Lira, S. Bordignon, A. Speghini, U. Caldino
Summary: The laser and optical properties of glasses doped with Dy3+, Dy3+/Sm3+, Dy3+/Sm3+/Eu3+ were investigated. The potential of using these glasses as yellow laser medium was demonstrated, and non-radiative energy transfers between different ions were observed.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Ahmed M. Abdel-Aziz, R. A. Elsad, Emad M. Ahmed, Y. S. Rammah, M. S. Shams, M. H. Misbah
Summary: The physical and chemical properties of glasses with different Y2O3 content were studied. It was found that increasing Y2O3 content resulted in an increase in density and a decrease in molar volume and average boron-boron separation. The formation of Y3+ ions decreased the bond strength of B-O and shifted the absorption IR peak position. The ultrasonic longitudinal and shear velocities increased linearly with increasing Y2O3 content. The dielectric constant decreased up to 1.5 mol% Y2O3 content and then increased gradually due to the reduction in porosity.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
Jaqueline Valeski Gunha, Robson Ferrari Muniz, Aloisi Somer, Anderson Goncalves, Rafael Denkiewicz, Giulia de Souza Antero, Tasso O. Sales, Carlos Jacinto, Raouf El-Mallawany, Andressa Novatski
Summary: The study found that increasing LiF content in oxyfluorotellurite glasses led to a decrease in oxygen packing density and reinforced the glass network with the formation of F-Te-O bonds. Increasing LiF content improved the glass's thermal properties, lowering the glass transition temperature and increasing thermal stability, but this effect depended on the concentration of ZnO.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Kartika Maheshwari, Aman Prasad, Ravita Pilania, Shaik. Mahamuda, Yasha Tayal, A. S. Rao
Summary: Dy3+ and Dy3+/Eu3+ co-doped BZLP glasses were prepared and studied for their luminescence properties and energy transfer mechanism. The results showed that these co-doped glasses have good thermal stability and high activation energy, making them suitable for the fabrication of LEDs and red emitting devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
M. Shoaib, I Khan, N. Chanthima, Abdullah Alhuthali, N. Intachai, S. Kothan, A. Ahad, I Ullah, S. Khattak, G. Rooh, J. Kaewkhao, T. Ahmad
Summary: Two Er3+-doped phosphate glass systems were developed and their physical, optical, and luminescent properties were systematically studied. The results indicate that these glass systems have potential applications in optical amplifiers and tunable lasers.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
Hany Abo-Mosallam, Ebrahim A. Mahdy
Summary: A series of glass samples were synthesized via a melt quenching technique in the Li2O-NiO-P2O5 system, and it was found that the concentration of nickel oxide had an influence on the amorphous nature and physical properties of the glass. With an increase in nickel substitution for lithium, the glass transition temperature and glass softening temperature systematically increased, along with changes in glass density and molar volume. Nickel substitution also led to a decrease in the dissolution rate of the amorphous materials and varied the thermal expansion coefficients of the glasses.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Materials Science, Ceramics
Salavadi Stalin, Avula Edukondalu, Imed Boukhris, Z. A. Alrowaili, M. Ateyyah Al-Baradi, I. O. Olarinoye, D. K. Gaikwad, M. S. Al-Buriahi
Summary: Tellurite glass is studied for its potential as a host matrix for different oxides in ZnO-Li2O-GeO2-Bi2O3 glasses. The effects of TeO2/B2O3 substitution on synthesis, physical, optical, and radiation shielding properties were investigated. The results show that TeO2 and B2O3 additives significantly impact the fundamental properties of the glasses.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Kartika Maheshwari, Ravita, Aman Prasad, Yasha Tayal, A. S. Rao
Summary: Pr3+ doped BaO-ZnO- Li2O-P2O5 (BZLP) glass samples synthesized through melt quenching route were studied. The amorphous nature of undoped and doped BZLP glass was confirmed using X-ray diffraction (XRD). Absorption spectra showed multiple bands in ultraviolet, visible, and infrared regions. The samples exhibited emission at 604 nm with stimulated emission cross section and quantum efficiency evaluated. The BZLP glasses showed high thermal stability with decreased luminescence intensity at elevated temperatures.