Article
Polymer Science
Ahmed E. Hannora, A. M. Ali, E. El-Falaky, M. M. El-Desoky
Summary: The study revealed that glasses containing iron and bismuth elements have good solubility and electrical properties, with glasses containing Sr showing particularly interesting electrical characteristics.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
A. A. Ali, Ahlam M. Fathi, S. Ibrahim
Summary: Glasses containing xWO(3)-(30-x)-Bi2O3-15Li2O-15CaO-40B2O3 (0 <= x <= 10) were made using melt-quenching technique. Increasing the concentration of -WO3 resulted in higher glass transition temperature Tg and crystallization temperature Tc, and lower thermal expansion coefficient. Doping the glasses with WO3 caused unique electron spin resonance spectra due to the presence of unpaired pentavalent ions. Raman spectra showed that the glass network mainly consisted of [ BiO6], [ BO3], [ BO4], and [ WO4] structural units. The investigated glasses exhibited semiconductor behavior, with activation energies ranging from 0.02 to 0.08 eV and increasing dielectric constant and conductivities with temperature.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Textiles
Meirong Chen, Jianxun Liu, Zhishen Wu
Summary: This study investigates the influence of iron oxide content on the properties of basalt glass. The results show that increasing iron oxide content leads to higher density, molar volume, oxygen packing density, as well as improved elastic modulus and hardness of basalt glass.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Chemistry, Physical
M. A. Wederni, W. Hzez, A. Rached, R. Meftah, H. Rahmouni, K. Khirouni, S. Alaya, R. J. Martin-Palma
Summary: This study focuses on the development of novel lead-free materials that can replace lead-based compounds in high-temperature devices. By partially replacing Bi ions in Bi4Ti3O12 with Yb and Er, the researchers aimed to improve the material's physical properties. By adjusting the Yb content, they were able to control the conductivity, impedance, and permittivity of the material at different temperatures, opening up new possibilities for its application.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
M. S. Al-Buriahi, Sultan Alomairy, Abdu Saeed, A. S. Abouhaswa, Y. S. Rammah
Summary: The experimental investigation explored the electrical and mechanical properties of materials with varying ZrO2 content, showing a decrease in ionic packing density and increase in dissociation energy with increasing ZrO2 content. The elastic modulus and shear modulus decreased, while Poisson's ratio changed as ZrO2 content increased.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
Mohamed M. Ibrahim, E. M. Ahmed, F. Abdel-wahab, Abdullah K. Alanazi
Summary: The study investigated the electrical conductivity and dielectric properties of glass systems with and without lead, finding that the mechanism of polarons hopping applied to the ac conductivity of lead-containing glasses. The DC activation energy was positively correlated with lead oxide content, and the higher dielectric constant of lead-free samples was attributed to increased polarized space charges in the glass network due to the presence of precipitated iron.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
A. Rashid, Krupa Maria Kuruvila, Seethal Pappachan, Midhun Viyyur, N. V. Giridharan
Summary: ([K0.5Na0.5](1-x)Bi-x [Nb1 - xTix])O-3- KNN-100xBT ceramics with varying x values from 0.00 to 0.08 were synthesized using conventional sintering technique. X-ray diffraction analysis confirmed the formation of stable perovskite phase in all compositions, with no secondary phase observed. Raman studies showed the local lattice dynamics and crystal structure. The optimal properties were observed in KNN-08BT, with a dielectric constant of 1700, spontaneous polarization of 25 μC/cm², piezoelectric strain of 0.24%, and d33 value of 235 pC/N.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Ceramics
N. A. Zhuk, M. G. Krzhizhanovskaya, N. A. Sekushin, D. V. Sivkov, V. A. Muravyov
Summary: For the first time, mixed nickel pyrochlore of the Bi2NiTaNbO9 composition was synthesized through solid-phase reaction. The X-ray diffraction data confirmed the formation of a disordered pyrochlore structure. Doping with Nb(V) ions improved the microstructure of the sample. The thermal expansion coefficient of Bi2NiTaNbO9 was 6.0 x 10-6 degrees C-1 and doping with niobium had no significant effect on its thermal behavior and stability. Electrical properties were also investigated, with the sample exhibiting dielectric properties and a conduction activation energy of 1.34 eV.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Farha Jabeen, Raza Shahid, M. Shahid Khan, Raghvendra Pandey
Summary: Lead-free 0.7BiFeO(3)-0.3BaT(i1-x)Mn(x)O(3) ceramics were prepared by adding MnO2 and their structural, spectral, electrical, magnetic, and piezoelectric properties were investigated. The results showed that the addition of MnO2 significantly enhanced the electrical and piezoelectric properties of the ceramics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
R. Nagaraju, B. Devaiah, L. Haritha, K. Chandra Sekhar, Md. Shareefuddin, M. A. Sayed, G. Lalitha, K. Vijaya Kumar
Summary: An extensive study was conducted on the physical and structural properties of CPBBCR: CaF2-PbF2-Bi2O3-B2O3-Cr2O3 glasses, including density, molar volume, and optical properties. Various analysis methods were used to determine the properties and composition of the glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Ahmad S. Abu-Khadra, Ashraf M. Taha, A. M. Abdel-Ghany, Ashraf A. Abul-Magd
Summary: By adding AgI to cobalt-lead borate glasses, the glass network's compactness can be enhanced, the structure units of boron can be modified, and spectral tunability for optical absorption can be provided. These glasses exhibit semiconductor properties and are suitable for multi-functional optical devices operating in the visible and near-infrared spectral regimes.
CERAMICS INTERNATIONAL
(2021)
Article
Optics
O. I. Sallam, Hesham M. H. Zakaly, Shams A. M. Issa, M. Rashad
Summary: The study explored the structural, optical, and electrical properties of glasses synthesized under different gamma irradiation doses and Sm2O3 contents. Results showed that gamma irradiation doses and Sm2O3 content influenced the crystallinity, transmittance, electrical properties, and optical band gap of the glasses.
Article
Materials Science, Ceramics
Mioara Zagrai, Sergiu Macavei, Simona Rada, Maria Elena Pica, Stela Maria Pruneanu
Summary: The trivalent gadolinium doped lead-lead dioxide glass has been successfully fabricated and investigated for its structural, optical, and luminescence properties. The addition of Gd2O3 content affects the structural units of the glass and the environment of Gd3+ ions, leading to emissions corresponding to Gd3+ ions transitions. The glass is suggested for warm orange luminescence applications based on CIE color coordinates.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Birampally Kalyani, Navaneetha Pujari, Avula Edukondalu, M. Srinivasa Reddy, C. P. Vardhani
Summary: The AC conductivity and dielectric properties of Li2O-Bi2O3-B2O3-As2O3 glass system were investigated. The results showed that the presence of bismuth reduced the DC conductivity and increased the activation energy. The temperature and frequency dependence of the dielectric modulus exhibited a Debye-type relaxation behavior.
Article
Physics, Condensed Matter
Sh Heikal, H. M. Mokhtar, W. A. Abd El-Ghany
Summary: The study investigates the effect of different CuO content on the electrical and dielectric properties of sodium borate glasses. It is found that increasing CuO content results in an increase in D.C. electrical conductivity and a decrease in activation energy. The incorporation of CuO into the glass structure modifies its conduction type to ionic. The A.C. study reveals that all investigated glasses obey the correlated barrier hopping model (CBH), and the relaxation nature of the glasses is analyzed from the real and imaginary parts of the electric modulus.
PHYSICA B-CONDENSED MATTER
(2023)
