Article
Chemistry, Multidisciplinary
Amine Bendahhou, Pascal Marchet, Ablouh El-Houssaine, Soufian El Barkany, Mohamed Abou-Salama
Summary: Ba5CaTi2-xZnxNb8O30 ceramics with different x values were synthesized by solid-state reaction, and their structural and dielectric properties were studied. XRD and SEM analysis revealed the phase formation and microstructure characteristics of the ceramics, while complex impedance spectroscopy was used to investigate the frequency-dependent dielectric properties.
Article
Materials Science, Ceramics
Nadejda Horchidan, Lavinia P. Curecheriu, Vlad A. Lukacs, Radu S. Stirbu, Florin M. Tufescu, Ioan Dumitru, George Stoian, Cristina E. Ciomaga
Summary: This study investigates the effect of porosity on the structural and functional properties of Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics. The results show that increasing porosity leads to a decrease in permittivity and a shift in Curie temperature. The ceramics with intermediate porosity exhibit enhanced piezoelectric response and optimum performance.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Yong Liu, Wentao Yi, Chunyan Yan, Jie Ma, Kunpeng Wang, Liqun Fan
Summary: Lead-free piezoceramics (K0.48Na0.52)(0.98)Sr0.01NbO3+xmol%SnO2 were fabricated, with x = 0.5 showing the best electrical properties among the samples studied.
Article
Chemistry, Physical
Guangtan Miao, Ming Yin, Peng Li, Jigong Hao, Wei Li, Juan Du, Guorong Li, Chunming Wang, Peng Fu
Summary: This study investigates the influence of Cr on the structure and electrical properties of CCCTO ceramics. It was found that Cr doping suppressed abnormal grain growth, resulting in a more uniform grain size distribution, and all samples exhibited a noticeable Negative Temperature Coefficient (NTC) effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yanfeng Liu, Xianhui Wang, Hangyu Li, Jingzhe Lu, Zhengyang Wang, Chunsheng Zhou
Summary: The CuO semi-coated TiB2 composite particles were synthesized using electroless plating, and Ag-4 wt%TiB2-0.7 wt%CuO contact material was prepared by spark plasma sintering. The presence of CuO nanoparticles on the surface of TiB2 particles effectively inhibited aggregation and promoted densification of the contact material. The addition of CuO resulted in increased electrical conductivity and relative density, enhancing the sinterability, electrical conductivity, and arc erosion resistance of the material.
Article
Engineering, Electrical & Electronic
A. Lagunas-Chavarria, M. G. Navarro-Rojero, M. D. Salvador, Jose M. Catala, A. Borrell
Summary: Powders of K0.5Na0.5NbO3 lead-free piezoelectric ceramics were successfully synthesized via conventional and microwave-assisted heating. The microwave synthesis resulted in smaller particle size but higher porosity compared to conventional method, leading to a decrease in dielectric values.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
A. Yu Volkov, A. A. Kalonov, D. A. Komkova
Summary: Cu/Mg-composite rods were obtained by hydmextrusion at room temperature, inside of which containing 400 Mg-filaments. The structure, microhardness and electrical properties of the composites were studied after various heat treatments, revealing the formation of different intermetallic phases and high-strength filaments at elevated temperatures. The microhardness of filaments increased significantly during reactions, while the electrical resistivity of the composite remained almost unchanged.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Ceramics
Qingquan Hou, Bin Yang, Chao Ma, Zhiyong Zhou, Ruihong Liang, Hao Li, Xianlin Dong
Summary: This study investigates the effect of W6+ doping on the crystal structure, microscopic morphology, and electrical properties of calcium bismuth niobate ceramics. It was found that appropriate W6+ doping can enhance the piezoelectric and thermal depoling properties of the material, providing a feasible approach to improve its potential applications in high temperature piezoelectric vibration sensors.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Condensed Matter
Jianke Liu, Jiejie Zhu, Wenbin Cao, Shihua Liu, Zhizhi Li, Honglin Chen, Yuwei Guo, Rongkai Xu, Keying Liu
Summary: The effects of Sc2O3 doping on the microstructure and electrical properties of ZnO varistors were analyzed in this study. It was found that Sc2O3 doping promotes uniform grain growth and improves the breakdown field strength of varistors. Additionally, Sc2O3 doping enhances the barrier height, resulting in a significant increase in the nonlinear coefficient and a decrease in leakage current density.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Analytical
Amira Ben Gouider Trabelsi, Ayman M. Mostafa, Fatemah H. Alkallas, W. B. Elsharkawy, Ameenah N. Al-Ahmadi, Hoda A. Ahmed, Sherif S. Nafee, Rami Adel Pashameah, Eman A. Mwafy
Summary: A polymeric nanocomposite film composed of PMMA/PVDF and varying amounts of CuO NPs was successfully prepared using the casting method to enhance its electrical conductivity. The incorporation of CuO NPs was confirmed by the noticeable differences in vibrational peaks and an increase in the amorphous characteristic of PMMA/PVDF. The addition of CuO NPs also resulted in a smoother polymeric structure with interconnected pore structures and an increase in surface roughness, leading to an increase in surface area.
Article
Nanoscience & Nanotechnology
Jie Dai, Muzhi Ma, Zhu Xiao, Xiangpeng Meng, Gai Sun, Tianyi Zhang, Tao Zhou, Linhan Li, Yuxiang Zhu
Summary: This study shows that adding a small amount of Si in Cu-0.26Cr-0.14Mg alloy greatly improves its strength and electrical conductivity. Si promotes the precipitation of alloying elements, refines the microstructure, and enhances the effects of dislocation strengthening and Orowan-Ashby strengthening.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
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)
Article
Materials Science, Ceramics
Przemyslaw Niemiec, Dariusz Bochenek, Dagmara Brzezinska
Summary: The paper investigates the effects of different sintering methods on the basic characteristics of PZT-type multicomponent ceramics. The results show that samples obtained by pressureless free sintering and hot pressing methods exhibit favorable electrophysical properties.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Qinyu He, Chengyi Zhu, Yulong Liu, Wen Yan, Xiangliang Wan, Guangqiang Li
Summary: The microstructure, texture, mechanical properties, and magnetic properties of low carbon and silicon non-oriented electrical steels annealed at different temperatures were investigated. The results showed the presence of various precipitates, including fine precipitates and composite precipitates, in the samples annealed at higher temperatures. The magnetic properties of the experimental samples were found to be superior to commercially available steels of the same grade.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Daniel Drdlik, Dominik Zeman, Pavel Tofel, Zdenek Chlup, Hynek Hadraba, Katarina Drdlikova
Summary: The study investigates the correlation of different piezoelectric measurement methods on various material states, finding that ceramic powder treatment by ball milling and EPD technique can lead to thick and dense deposits. The results show that after sintering, BCZT ceramics can achieve high relative density, hardness, and piezoelectric coefficients.
CERAMICS INTERNATIONAL
(2021)
