Article
Physics, Applied
Shuai Yang, Fenghua Tian, Chunchun Li, Mingwen Wang, Jinjing Zhang, Qingshan Zhu, Jie Wu, Jinglei Li, Xiangyu Gao, Fei Li
Summary: In this work, <001>-oriented Pb(In1/2Nb1/2)O-3-Pb(Sc1/2Nb1/2)O-3-PbTiO3 textured ceramics were fabricated by the template grain growth method. The electromechanical properties of these ceramics under different external fields were characterized and analyzed. The results showed that the dielectric constants of all textured ceramics increased with uniaxial prestress and hydrostatic pressure, but decreased with the increase of d.c. bias electric field. The textured ceramic with 3 vol. % BT templates exhibited the best stability under external fields, with less than 2% change in the electromechanical coupling factors under hydrostatic pressure increase to 100 MPa.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Mona M. Khalil, Adly H. El-Sayed, M. S. Masaoud, Mahmoud A. Hamad
Summary: Films of alizarin yellow GG (AYGG)-CuCl2 blended with polyvinyl alcohol (PVA) were successfully synthesized by casting method. The dielectric properties of AYGG-Cu(II) blended with PVA are enhanced at lower frequencies, while the DC electrical resistivity of the blended film is temperature independent at low temperatures. The Al/(AYGG - Cu(II) blended with PVA)/ITO solar cell under green light illumination is most effective.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Electrical & Electronic
Mingzhe Hu, Rong Su, Chuanbin Wang
Summary: BCZT/LSMO bilayer multiferroic heterostructures with different BCZT layer thicknesses were successfully fabricated using pulsed laser deposition technique, exhibiting varied multiferroic properties. The multiferroic properties of the heterostructures significantly improved with increasing BCZT layer thickness, with the largest magnetoelectric coefficient achieved at 150 nm BCZT layer thickness.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Jasmine Jose, Vinoy Thomas, Jancy John, Raji Mary Mathew, Jishad A. Salam, Gijo Jose, Rani Abraham
Summary: This study evaluated the dielectric properties and ac-electrical conductivity of cellulose nanofibers, finding that nanofibers exhibit a higher dielectric constant in the low-frequency region and frequency-independent behavior at high frequencies. The conductivity of nanofibers increases with frequency and temperature, with potential applications in future flexible electronics.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Xingyu Fan, Jiang Dai, Liang Wei, Yan Feng, Runjun Sun, Jie Dong, Qiushi Wang
Summary: By utilizing the method of Y-Si-O/PVB sol-gel electrospinning combined with high-temperature calcination, ceramic fiber felts composed of gamma-Y2Si2O7 fibers were successfully prepared. These felts have the characteristics of lightweight, high porosity, and low thermal conductivity, and exhibit excellent insulation performance in high temperature conditions.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Yifan Yuan, Yuanyuan Ni, Xuanyuan Jiang, Yu Yun, Jing Li, Xiaoshan Xu
Summary: In this study, we achieved thin films with quasi-two-dimensional morphology and crystallinity using low-temperature deposition followed by restrained crystallization (LDRC) method. The research on 2-methylbenzimidazole showed that quasi-two-dimensional films with highly oriented polar axes and single-crystal-level ferroelectric properties can be grown using LDRC.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Physiology
Weice Wang, Weichen Li, Benyuan Liu, Lei Wang, Kun Li, Yu Wang, Zhenyu Ji, Canhua Xu, Xuetao Shi
Summary: In this study, a new method for measuring the dielectric properties of blood was designed to investigate the temperature-dependent characteristics of blood. The results showed that the temperature coefficient of the real part of blood resistivity gradually decreased, while the temperature coefficient of the imaginary part exhibited a bimodal distribution. A model was developed to describe the dielectric spectra at these temperatures, providing a foundation for future studies.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Materials Science, Ceramics
Zehui Lin, Menghong Li, Jiaqi He, Mingwei Li, Gang Wang, Yutong Li, Yiming Zeng, Jiao Han, Jisong Liu
Summary: CaO-B2O3-SiO2-Ta2O5 (CBST) glass-ceramics with different Ta2O5 content were prepared through glass melt quenching and subsequent heat treatment. The addition of Ta2O5 resulted in the destruction of B-O and Si-O bonds due to the strong attraction of Ta5+ to oxygens in the BO33- and SiO32- structures. The addition of Ta2O5 also affected the thermal and crystallization properties, increasing the softening point, crystallization starting temperature, and exothermic crystallization peak temperature of the CaSiO3 phase.
CERAMICS INTERNATIONAL
(2023)
Article
Energy & Fuels
Tao Ge, Chuanchuan Cai, Fanfei Min, Mingxu Zhang
Summary: This study investigated the influence of medium composition, microwave frequency, and temperature on the dielectric properties and desulfurization rates of thiophene components in coal. Results showed that thiophene compounds with conjugated structures had poor dielectric properties, and the dielectric loss of benzothiophene increased with temperature before peaking at 90 degrees C. Microwave-assisted citric acid desulfurization at 915 MHz and 90 degrees C provided the best desulfurization rate of benzothiophene in coal-like substances, reaching 42.87%.
Article
Engineering, Electrical & Electronic
Emad Mousa, Eman O. Taha
Summary: This study aimed to prepare a low-cost, eco-friendly, free-standing film with optimized physical properties. The mechanical and electrical properties of PVA can be tuned by careful modulation of glycerol content, while the optical properties are more sensitive to nSiO(2) content.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Polymer Science
Qian Wang, Xidong Liang, Chao Wu, Ningzhen Wang, Shuming Liu, Zhou Zuo, Yanfeng Gao
Summary: This study investigated the dielectric spectroscopy of P(VDF-HFP) films over a wide frequency and temperature range, revealing the temperature dependence and commonality among different polarization processes. The findings could be used as a paradigm for the rational design of polymer dielectrics to enhance or suppress specific polarization processes.
Article
Nanoscience & Nanotechnology
Liang Luo, Yi Ru, Yue Ma, Shusuo Li, Shengkai Gong
Summary: This study investigates the effect of gamma'-forming elements, including Al and Ta, on the creep properties of turbine blade-manufacturing Ni-based single-crystal superalloys at 1200 degrees C. The study found that the creep properties are sensitive to the addition of Al and Ta, reaching their peak in a specific composition range. Additionally, adding gamma'-forming elements facilitates the formation of an abnormal rattan-shaped gamma' phase. The research also reveals that the addition of Al and Ta affects the microstructure evolution of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Multidisciplinary
Serhat Orkun Tan, Osman Cicek, Cagri Gokhan Turk, Semsettin Altindal
Summary: The impedance spectroscopy method was used to investigate the electrical properties of Al/Al2O3/p-Si MOS capacitors. The results showed excellent performance in terms of ac electric conductivity, dielectric constants, and electric modulus components. The dielectric constants decreased with increasing frequency, while tan delta decreased at higher frequencies. The values of electric modulus reached a maximum with increasing frequency in the depletion region, and shifted to forward biases depending on the density distribution of N-ss. The results highlight the significant impact of polarization processes, surface conditions, and the Al2O3 interlayer on the electrical modulus and conductivity.
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(2022)
Article
Forestry
Ruixia Qin, Huadong Xu, Yanbo Hu, Liming Zhao, Nengzhi Chen
Summary: The study investigated the effect of frequency and temperature on the dielectric properties of wood with different moisture contents. The results showed that the dielectric constant of wood increased with increasing moisture content and temperature, while it decreased with increasing frequency. The change in the dielectric loss factor was more complex. These findings provide a theoretical basis for further research on the dielectric properties of wood with high moisture content and the measurement and calibration of moisture content in standing trees.
Article
Materials Science, Ceramics
Zheng Liang, Jie Li, Jian Wu, Yan Yang, Bing Lu, Ying Zhang, Huaiwu Zhang
Summary: MgO ceramics with LiF sintering aid showed ultralow loss and excellent microwave and terahertz dielectric properties, with the quality factor reaching up to 120288 GHz. The compositions and properties of the ceramics were optimized with a LiF content of 4wt%.
CERAMICS INTERNATIONAL
(2022)
