Article
Materials Science, Multidisciplinary
F. Theska, R. F. Webster, S. R. Street, M. Lison-Pick, S. Primig
Summary: Polycrystalline superalloys are high-performance materials with complex microstructures that can be affected by micro-alloying elements such as B, C, or Zr. The addition of Zr can impact the morphology and dispersion of C16-M2B borides in the alloy.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
N. Abu-Elsaad, S. A. Mazen, A. S. Nawara
Summary: Three systems of polycrystalline Ni0.7-xZn0.3MxFe2O4 ferrite doped with Mn/Co/Cu ions were studied for their conductivity and dielectric parameters. The conductivity showed metallic and semiconductor-like behavior with temperature and frequency variations. The conduction mechanism is attributed to small polaron hopping between Fe3+ and Fe2+ ions, with dielectric parameters evolving independently with increasing Mn/Co/Cu concentrations.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Polymer Science
B. Pascual-Jose, Alireza Zare, Silvia De la Flor, Jose Antonio Reina, M. Giamberini, A. Ribes-Greus
Summary: The dielectric spectra and conductivity properties of neat poly(epichlorohydrin-co-ethylene oxide)(PECH-co-EO) copolymer and two modified copolymers were analyzed. The thermal orientation process was used to fine-tune the molecular motion and determine their suitability for cation transport materials. The study showed that the grafting with dendron units affected the movement of both the lateral and main chains, and thermal orientation induced crystallization in the main chain and modified the cooperative motion associated with glass transition. The conductivity analysis revealed that neither the thermal orientation process nor the dendrimers altered the ideal long-range pathways, and the copolymer with the highest concentration of dendrimers exhibited the best performance for proton transport.
Article
Engineering, Chemical
Sergei Buinachev, Maksim Mashkovtsev, Anna Dankova, Nina Zhirenkina, Ksenia Kharisova
Summary: YSZ powders were synthesized by controlled double-jet precipitation, and the pH value of 5 resulted in powders with high bulk density, fluidity, and narrow particle size distribution. Coatings produced from this powder exhibited high adhesion, uniform porosity, and reduced roughness.
Article
Materials Science, Multidisciplinary
Joonas Merisalu, Taivo Jogiaas, Toomas Daniel Viskus, Aarne Kasikov, Peeter Ritslaid, Tanel Kaambre, Aivar Tarre, Jekaterina Kozlova, Hugo Mandar, Aile Tamm, Jaan Aarik, Kaupo Kukli
Summary: Thin films containing multilayer ZrO2:Al2O3 structures or ZrO2 deposited on ZrxAlyOz buffer layers were characterized. The films exhibited resistive switching behavior and high relative permittivities. The double-layered ZrxAlyOz-ZrO2 stacks showed improved endurance.
Article
Engineering, Electrical & Electronic
P. Krishnamoorthi, P. Sundaramoorthi
Summary: A novel and high optical quality NLO single crystal of copper zinc hydrogen phosphate (CuZnHPO4) was grown using a gel technique in silica hydrogel media, exhibiting good thermal stability and crystal structure. SEM and TEM images showed plate-like morphology and growth of the crystal. UV spectra results indicated visible light absorption which could be useful for NLO applications. The crystal also exhibited high conductivity and a positive photoconduction nature, with a 2.73 times higher SHG efficiency compared to KDP single crystal.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Muhammad Imran Arshad, M. S. Hasan, Atta Ur Rehman, Maria Akhtar, Le Duc Tung, N. Amin, Khalid Mahmood, Adnan Ali, Thithawat Trakoolwilaiwan, Nguyen Thi Kim Thanh
Summary: Lanthanum doped Mg-Cd-Cu ferrites with ease and cost-effectiveness have been synthesized and comprehensively characterized. The study revealed interesting and practically different properties in their structural, optical, electric, dielectric, molecular vibrational, and magnetic aspects, suggesting their potential application in longitudinal recording media and microwave absorbance.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Ruqayya Zakir, Sadia Sagar Iqbal, Atta Ur Rehman, Sumaira Nosheen, Tasawer Shahzad Ahmad, Nimra Ehsan, Fawad Inam
Summary: The spinel nano-ferrites with varying Ce3+ doping were synthesized using the sol-gel auto combustion method. The XRD analysis confirmed the formation of spinel matrix and reduction in lattice constant, while the FTIR and UV-visible studies revealed changes in absorption bands and optical band gaps. The electrical resistivity, dielectric constant, and dielectric constant loss were also found to be influenced by Ce3+ doping, showing dispersive behavior at higher frequencies.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
M. Atif, S. Ullah, Atta Ur Rehman, K. Shahzad, W. Khalid, Z. Ali, Y. Chen, H. Guo, M. Nadeem
Summary: Pure BaFe12O19 and Ti4+ - M2+ co-doped BaFe11Ti0.5M0.5O19 (M = Co2+, Ni2+, Zn2+) hexaferrites were synthesized using a co-precipitation method. The Ti - Ni and Ti - Zn co-doped samples showed enhanced lattice parameters and cell volume, increased dielectric properties and reduced coercivity, making them favorable for electromagnetic absorbing applications. These variations in properties are attributed to site preferences of co-doped ions, charge carrier mobility, and microstructure.
CERAMICS INTERNATIONAL
(2021)
Article
Biochemistry & Molecular Biology
Yaru Pan, Xihui Liang, Zhihao Liang, Rihui Yao, Honglong Ning, Jinyao Zhong, Nanhong Chen, Tian Qiu, Xiaoqin Wei, Junbiao Peng
Summary: Multi-component metal oxide films can achieve good performances in several aspects, such as leakage current density and capacitance density. The AMYZO(x) group has the lowest leakage current density, while the HMYZO(x) group has the highest capacitance density.
Article
Chemistry, Physical
D. H. Kim, H. Y. Hong, K. Park
Summary: By co-doping with Ca2+ and Ba2+, the electrical conductivity of BiCuSeO is significantly increased while the phonon thermal conductivity is reduced. This combination leads to a significant improvement in thermoelectric performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Multidisciplinary
Muhammad Ehsan Mazhar, Muhammad Bilal, Abdul Waheed, Javed Ahmad, Imran Khan, Waseem Abbas, Naeem Akhtar, Asim Javed, Muhammad Nauman Usmani, Hassan Mahmood, Arfa Riaz, Mehek Bukhari
Summary: The synthesized nanocrystalline lanthanum molybdenum oxide powders with varying Fe3+ concentrations exhibited increasing DC electrical conductivity and decreasing dielectric loss, making them potential candidates for applications in super capacitors. The study also analyzed the structure, morphology, and chemical composition of the powders using XRD, SEM, and EDS.
Article
Materials Science, Ceramics
Vitoria Mussi Toschi, Christine Bogicevic, Houssny Bouyanfif, Henri Laville, Pierre-Eymeric Janolin
Summary: The study shows that nominal stoichiometry, phase separation, and metallization method significantly impact the dielectric properties of NBT-6BT material. Increasing the Na/Bi ratio leads to higher conductivity, dielectric losses, depolarization temperature, and lower temperature of maximum permittivity. Phase separation during synthesis results in secondary Ba-containing phases that can positively affect dielectric properties. The method of metallization also influences the dielectric properties, contributing to discrepancies in reported results.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Yaseen Ahmad, Tariq Mustafa, Bindu Raina, Kumari Kanika Bhadwal, K. K. Bamzai
Summary: This study focuses on modifying the properties of zinc ferrite by introducing varying amounts of calcium and dysprosium. The synthesized nanoparticles exhibit a face centered cubic spinel structure and decreased agglomeration with increased doping concentration. The materials show potential as photo catalysts for water treatment, with an increased optical band gap. The presence of unpaired electrons and decreased super-exchange interactions were observed. The nanoparticles exhibit ferrimagnetic and soft magnetic behavior, with increasing crystalline anisotropy and super-paramagnetic properties. The dielectric behavior can be explained by Maxwell-Wagner model and Koop's theory.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Md Abu Mosa, M. K. Das, F. Alam, M. N. Khan, S. C. Mazumdar
Summary: The role of co-doping with Ba and Sm in BiFeO3 has been studied, and it is found that co-doped samples have improved dielectric and electric polarization properties. Sm doping notably increases the real part of initial permeability and relative quality factor, as well as the coercivity of Bi0.85Ba0.15FeO3 ceramics. This study is of great importance for the fabrication of magnetoelectric devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
C. Raja Babu, N. Rama Manohar Reddy, Kishore Reddy
CERAMICS INTERNATIONAL
(2015)
Article
Materials Science, Multidisciplinary
Rajababu Chintaparty, Bhavani Palagiri, Ramamanohar Reddy Nagireddy, Venkata Subba Reddy Immareddy, W. Madhuri
Article
Crystallography
Rajababu Chintaparty, Bhavani Palagiri, Ramamanohar Reddy Nagireddy, Venkata Subbha Reddy Imma Reddy
Article
Metallurgy & Metallurgical Engineering
Palagiri Bhavani, Chintaparty Rajababu, Md. Arif, Immareddy Venkata Subba Reddy, Nagireddy Ramamanohar Reddy
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
(2016)
Article
Materials Science, Multidisciplinary
P. Bhavani, C. H. Rajababu, M. D. Arif, I. Venkata Subba Reddy, N. Ramamanohar Reddy
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2017)
Article
Materials Science, Multidisciplinary
Sreenivasa Kumar Godlaveeti, Rajababu Chintaparty, Adinarayana Reddy Somala, Asma A. Alothman, Saikh Mohammad, Ramamanohar Reddy Nagireddy
Summary: CeO2 nanoparticles were successfully synthesized by the hydrothermal method and characterized using various instrument techniques. The influence of different annealing conditions on the supercapacitor and dielectric performance of CeO2 nanoparticles was also investigated.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
