Article
Materials Science, Ceramics
Sushmita Dwivedi, Manish Badole, Hari Narayanan Vasavan, Sunil Kumar
Summary: The electrical conduction behavior of lead-free BiZnNbO ceramics annealed in different atmospheres was studied, with the sample annealed in oxygen environment showing the lowest conductivity due to reduced oxygen vacancy defects. An anomaly observed at 250 degrees Celsius in dielectric plots for certain samples was attributed to defect relaxation.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Yong Guo, Junlang Tan, Jingchang Zhao
Summary: The addition of CTO inhibits the growth of CCTO grains and introduces nanocrystals inside the grains. Impedance spectroscopy reveals two semi-circular arcs corresponding to the effects of micron-level grains and nano-level nanocrystals.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
N. A. Zhuk, N. A. Sekushin, M. G. Krzhizhanovskaya, V. A. Belyy, R. Korolev
Summary: Ni-doped CaCu3Ti4O12 ceramics were synthesized with different compositions and their electrical properties were studied. The samples exhibited high dielectric constant and low dielectric loss, which was attributed to the mechanism of ionic charge transfer predominating at room temperature, leading to significant values of impedance phase at low frequencies.
SOLID STATE IONICS
(2021)
Article
Engineering, Electrical & Electronic
P. G. R. Achary, Sonali Behera, R. N. P. Choudhary, S. K. Parida
Summary: This study reports the structural, dielectric, spectroscopic, and electrical characteristics of cerium-modified strontium manganite perovskite SMCO prepared by a high-temperature solid-state reaction technique. The SMCO compound exhibits a tetragonal crystal structure, with an average crystallite size of 74 nm, and shows semiconductor properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Pengfei Chen, Chao Cheng, Tianyu Li, Yuhang Wang, Chunchang Wang, Liuwan Zhang
Summary: The study shows that the dielectric properties of acceptor-doped rutile TiO2 ceramics can be significantly improved through Ar/H-2 annealing, with Ga3+ identified as the most suitable dopant. Excellent dielectric properties were achieved in the 5 mol% Ga2O3-95 mol% TiO2 ceramic, including colossal and flat dielectric permittivity, low dielectric loss, and good frequency stability.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Haowen Liu, Ateer Bao, Jun Zhang, Yaohang Gu, Xiaoyan Zhang, Xiwei Qi
Summary: A new kind of high-entropy rare earth garnet ceramics was successfully synthesized by solid state reaction. The increase of Al content leads to the decrease of relative dielectric constant and the increase of dielectric loss. The activation energies of grain boundary and grain electrical conductivities indicate that the difference between them enhances the dielectric properties. These findings provide important insights for the study of colossal dielectric materials.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Yuan Zhou, Zhixuan Tian, Yanzhi Cai, Chengye Liu, Yifan Li, Xiang Li
Summary: Tm2O3 was introduced into the KNN structure for the first time in this study, and (1-x)K0.5Na0.5Nb0.7Ta0.3O3xTm(2)O(3) (x=0.1-1.0%) powders were synthesized through a solvothermal method. The corresponding ceramics were prepared via atmospheric sintering. The introduction of Tm3+ promoted the refinement of KNN grain and resulted in significant increase in room-temperature dielectric permittivity and relaxation dispersion.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Bing Liu, Lei Li, Kai Xin Song, Min Min Mao, Zhilun Lu, Ge Wang, Linhao Li, Dawei Wang, Di Zhou, Antonio Feteira, Ian M. Reaney
Summary: In this study, a cold sintering process was used to pre-densify LiF ceramics, leading to significant grain growth and an increase in relative density to 92% after post-annealing treatments. The microwave quality factor (Qf) was greatly improved and reached a maximum of 110,800 GHz, making cold sintered LiF a promising component in low temperature co-fired ceramic formulations.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Wentao Hao, Panpan Xu, Peide Han, Mingwen Wang
Summary: Introducing carbon into CCTO ceramics can improve their capacitance and grain boundary resistance, thereby reducing dielectric loss. Annealing treatment can further increase the grain boundary resistance, leading to a significant reduction in dielectric loss.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Zunping Xu, Yi Chen, Nanpu Cheng
Summary: In this study, Ca0.9Sr0.1Cu3-yZnyTi4-xBxO12 ceramics were prepared using the citrate precursor process and sintered at 1100 degrees C for 3 hours. XRD and Raman analysis confirmed that the addition of Zn2+ and B3+ can significantly improve the grain boundary response and dielectric properties of the ceramics.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
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
Min Yang, Yan Gao, Yong Zheng, Xuepeng Lu, Huimin Yang, Xiangyu Xu, Peng Wu
Summary: Ca1-xBaxMgSi2O6 ceramics were prepared through solid-state reaction sintering, and the effects of substituting Ba2+ for Ca2+, relative density, phase composition, crystal morphology, and microwave dielectric properties were studied. The results showed that a single phase was formed when x ≤ 0.2, while a second phase appeared at x = 0.4. The increase in Ba2+ substitution affected the microwave dielectric properties, with Qxf value first increasing and then decreasing, and epsilon(r) value continuously increasing. The z(f) value also slightly improved.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Rui Da Shi, Mei Ying Liu, Xiao Li Zhu, Xiang Ming Chen
Summary: Ordered domain engineering has been developed to modify and improve physical properties in complex perovskite ceramics. The present work demonstrates the successful implementation of ordered domain engineering in Ba(Ni1/3Nb2/3)O3 ceramics, leading to significant enhancements in electrical resistivity, thermal conductivity, dielectric strength, and energy storage density.
JOURNAL OF MATERIOMICS
(2022)
Article
Materials Science, Ceramics
Xia Fang, Limei Pan, Jie Yao, Shuang Yin, Yang Wang, Quan Li, Jian Yang
Summary: Fully dense SiC/spherical graphite-AlN microwave-attenuating composite ceramics were prepared, where the addition of SiC led to a decrease in electrical conductivity and enhanced polarization relaxation. The absorption performance characteristics of the composites could be significantly tuned by controlling the SiC content, resulting in optimized impedance matching and superior absorption at certain frequencies.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
Ahmed N. Al-hakimi, Fahad Alminderej, Ibrahim A. Alhagri, Sadeq M. Al-Hazmy, M. O. Farea, E. M. Abdallah
Summary: In this study, nanocomposite films reinforced with different concentrations of tetragonal titanium dioxide nanoparticles were fabricated using pure polypyrrole as the host material. The films were characterized to investigate their structural, optical, morphological, electrical, and dielectric properties. Results showed that the addition of titanium dioxide nanoparticles enhanced the amorphous regions of the polypyrrole structure and increased the absorbance of the films. The energy gap of the films decreased as the concentration of titanium dioxide nanoparticles increased. The inclusion of titanium dioxide nanoparticles also improved the ionic conductivity and dielectric permittivity of the nanocomposite films. These findings suggest that these nanocomposites have potential applications in flexible capacitors, battery separators, and high-density energy storage systems.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Energy & Fuels
Natalia Valko, Wiktoria Evstigneeva, Victor Anishchik, Vitalii Bondariev, Pawel Okal, Tomasz N. Koltunowicz
Summary: Exposure of an electrolytic cell to X-rays during the electroplating process of Co/SiO2 results in intensified diffusion in the electrolyte volume and the formation of dense, uniform coatings. Additionally, X-rays have an orienting effect on the formation of crystal grains, leading to coatings with increased hardness and improved adhesion.
Article
Energy & Fuels
Pawel Zukowski, Przemyslaw Rogalski, Konrad Kierczynski, Tomasz N. Koltunowicz
Summary: By measuring the complex permittivity characteristics, it was found that there are two stages of changes in the dielectric and imaginary dielectric constants in oil-impregnated pressboard. As temperature increases, the frequency dependency shifts to higher frequency region, which is related to the change in relaxation time with temperature.
Article
Chemistry, Physical
A. V. Pashkevich, A. K. Fedotov, E. N. Poddenezhny, L. A. Bliznyuk, J. A. Fedotova, N. A. Basov, A. A. Kharchanka, P. Zukowski, T. N. Koltunowicz, O. V. Korolik, V. V. Fedotova
Summary: This study investigated the relationship between the structure and electric properties of composite ceramics and found that the type of doping agents and synthesis process can affect the phase composition and performance of the materials. In terms of electron transport, the contribution of the C-band depends on the low and deep donor centers. Doping with iron enhanced the performance of ZnO-based ceramic samples, while doping with cobalt resulted in a weaker effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Karolina Czarnacka, Jakub Kisala, Andrzej Kociubinski, Mateusz Geca
Summary: This paper explores the technology and measurements of thin-film three-layer resistors. NiFeCuMo/Ti/NiFeCuMo structures were developed using a DC magnetron sputtering method and their chemical composition was analyzed. The occurrence of giant magnetoresistance in the developed three-layers was successfully confirmed, with a maximum resistance change of approximately 2.75 ohms.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2022)
Article
Energy & Fuels
Tomasz N. Koltunowicz, Konrad Kierczynski, Pawel Okal, Aleksy Patryn, Miroslav Gutten
Summary: The aim of this study was to perform precise measurements of the frequency-temperature dependences of the loss angle tangent of a liquid-solid composite using the FDS Dirana meter. It was found that an increase in temperature leads to a shift of the waveforms into the higher frequency region, which is associated with a decrease in relaxation time. Better results were obtained after adjusting the temperature manually with Dirana software for estimating the moisture content at different temperatures.
Article
Energy & Fuels
Pawel Zukowski, Przemyslaw Rogalski, Tomasz N. Koltunowicz, Konrad Kierczynski, Marek Zenker, Alexander D. Pogrebnjak, Matej Kucera
Summary: This study investigated the conductivity and permittivity of electrical pressboard-insulating liquid-water composites and compared them to water. The presence of water increased the permeability of the composites below 100 Hz, and the conductivity of the composites exponentially increased with increasing water content. The activation energy of the composites' DC conductivity was higher than that of liquid water, and the dielectric relaxation times of the composites were significantly longer than those of water.
Article
Energy & Fuels
Pawel Zukowski, Przemyslaw Rogalski, Vitalii Bondariev, Milan Sebok
Summary: The aim of this study was to prepare and test a paper-oil insulation system according to CIGRE recommendations. It was found that the dimensions of the oil channel clearly affected the quality of the fitting process. By not taking into consideration real values of oil channel, the quality of the moisture content estimation was significantly improved.
Article
Nanoscience & Nanotechnology
Alexander K. Fedotov, Uladzislaw E. Gumiennik, Vladimir A. Skuratov, Dmitry V. Yurasov, Julia A. Fedotova, Alexey V. Novikov, Alexander S. Fedotov, Pavel Yu. Apel
Summary: In this study, the influence of Swift Heavy Ions (SHI) irradiation on electron transport in a silicon structure doped with antimony was investigated. It was found that the irradiation induced the competition between defect formation and annealing, and the low temperature carrier transport was mainly carried out by the delta-layer. Additionally, a transition in magnetoresistance was observed as the temperature decreased.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Tomasz N. Koltunowicz, Karolina Czarnacka, Piotr Galaszkiewicz, Fadei F. Komarov, Maxim A. Makhavikou, Oleg Milchanin
Summary: This paper presents the results of AC electrical measurements of Zn-SiO2/Si nanocomposites obtained by ion implantation. The study found that the conductivity and dielectric constant of the samples changed after annealing, indicating that annealing has an effect on the material properties.
Article
Chemistry, Physical
Pawel Zukowski, Piotr Galaszkiewicz, Vitali Bondariev, Pawel Okal, Alexander Pogrebnjak, Anatolyi Kupchishin, Anatolyi Ruban, Maksym Pogorielov, Tomasz N. Koltunowicz
Summary: In this paper, the frequency-temperature dependence of the conductivity and dielectric permittivity of nc-TixZr1-xC+alpha-C-y nanocomposites produced by dual-source magnetron sputtering was studied. The conductivity and permittivity relationships were found to be determined by three tunneling mechanisms, with the maxima in the low- and high-frequency regions decreasing and the maximum in the mid-frequency region increasing with temperature. Dipole relaxation according to the Cole-Cole mechanism was observed in the nanocomposites, and anomalous dispersion was observed at frequencies above 1 MHz for all composite contents.
Article
Nanoscience & Nanotechnology
Kateryna Diedkova, Alexander D. Pogrebnjak, Sergiy Kyrylenko, Kateryna Smyrnova, Vladimir V. Buranich, Pawel Horodek, Pawel Zukowski, Tomasz N. Koltunowicz, Piotr Galaszkiewicz, Kristina Makashina, Vitaly Bondariev, Martin Sahul, Maria Caplovicova, Yevheniia Husak, Wojciech Simka, Viktoriia Korniienko, Agnieszka Stolarczyk, Agata Blacha-Grzechnik, Vitalii Balitskyi, Veronika Zahorodna, Ivan Baginskiy, Una Riekstina, Oleksiy Gogotsi, Yury Gogotsi, Maksym Pogorielov
Summary: New conductive materials are needed for tissue engineering to develop regenerative strategies for nervous, muscular, and heart tissues. Polycaprolactone (PCL) is used to create biocompatible and biodegradable nanofiber scaffolds, while MXenes can make these scaffolds conductive and hydrophilic. This study investigates the physical properties, defect structure, and porosity of PCL-MXene composite scaffolds, and demonstrates their advantages over existing conductive scaffolds for tissue engineering in terms of structure, chemistry, electricity, and biology.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Analytical
Aleksandra Wilczynska, Andrzej Kociubinski, Tomasz N. N. Koltunowicz
Summary: This paper presents a test stand for measuring the alternating current electrical parameters of Cu-SiO2 multilayer nanocomposite structures. Dielectric nature of the test structure was confirmed through measurements at different temperatures and frequencies. A program was developed to control the impedance meter for improved measurement processes. Structural studies using SEM were conducted to analyze the effect of annealing on the multilayer nanocomposite structures. Uncertainties of the measurements were determined based on static analysis and manufacturer's recommendations.
Article
Energy & Fuels
Pawel Zukowski, Pawel Okal, Konrad Kierczynski, Przemyslaw Rogalski, Sebastian Borucki, Michal Kunicki, Tomasz N. Koltunowicz
Summary: This paper presents a study on the site percolation phenomenon using Monte Carlo computer simulation method for square matrixes with dimensions of 55, 101, and 151. The study shows that the statistical distribution of the percolation threshold value follows a normal distribution. As the number of iterations increases, the percolation threshold average value and standard deviation stabilize.
