Results 151 to 160 of about 2,269 (194)

The flexoelectric transition in CaCu3Ti4O12 material with colossal permittivity

Journal of Applied Physics, 2022
Significant flexoelectricity is expected to exist in materials with colossal permittivity. Here, we systematically studied the interplay of flexoelectricity and permittivity in CaCu3Ti4O12 (CCTO) ceramic by examining the thickness and electrode dependence of the flexoelectric coefficients over a wide range of temperatures.
Zhen Zhang, Shengwen Shu, Zhiguo Wang, Zhengqiu Xie, Huizhong Wang, Chunchun Li, Shanming Ke, Longlong Shu   +7 more
openaire   +1 more source

High energy storage and colossal permittivity CdCu3Ti4O12 oxide ceramics

Ceramics International, 2022
Abstract How to simultaneously realize colossal permittivity and high energy storage density has always been an urgent problem to be solved for ACu3Ti4O12-family ( A C T O ) oxide materials. In this work, an effective strategy of enhancing breakdown field strength ( E b ) was adopted to achieve high energy storage density ( W )
Zhanhui Peng, Jitong Wang, Fudong Zhang, Shudong Xu, Xiaoping Lei, Pengfei Liang, Lingling Wei, Di Wu, Xiaolian Chao, Zupei Yang   +9 more
openaire   +1 more source

Colossal dielectric permittivity materials: Myths and reality

Proceedings of 2014 International Symposium on Electrical Insulating Materials, 2014
Since their discovery, 13 years ago there has been a lot of interest in the colossal dielectric permittivity ceramic materials. These materials derived from or are related to the calcium-copper titanate (CaCu 3 Ti 4 O 12 ) exhibit large values of permittivities (e r > 10 5 ), well above those obtained with ferroelectric ceramics.
Zarel Valdez-Nava, Chafe Cheballah, Lionel Laudebat, Sophie Guillemet-Fritsch, Thierry Lebey   +4 more
openaire   +1 more source

Colossal permittivity resonators for wireless power transfer systems

2017 11th European Conference on Antennas and Propagation (EUCAP), 2017
Colossal permittivity dielectric resonators for magnetic resonant wireless power transfer systems are proposed. The wireless power transfer system based on two dielectric resonators with the permittivity e=1000 operating at the frequency 230 MHz is established.
Mingzhao Song, Pavel A. Belov, Polina V. Kapitanova   +2 more
openaire   +1 more source

Colossal permittivity, impedance analysis, and optical properties in La0.67Ba0.25Ca0.08Mn0.90Ti0.10O3 manganite

Journal of Materials Science: Materials in Electronics, 2021
This work investigated the dielectric and optical process of La0.67Ba0.25Ca0.08Mn0.90Ti0.10O3 (LBCMT) manganite using impedance spectroscopy and ellipsometric spectroscopy. LBCMT nano-polycrystalline sample synthesized by the molten salt method was subjected to annealing it 1000 °C.
M. Bourguiba, Z. Raddaoui, S. El Kossi, Thamraa Al-shahrani, A. Dhahri, M. Chafra, J. Dhahri, H. Belmabrouk   +7 more
openaire   +1 more source

Colossal permittivity and defect-dipoles contribution for Ho0.02Sr0.97TiO3 ceramics

Journal of Alloys and Compounds, 2018
Abstract High-performance dielectric materials arouse persistently considerable attention due to their potential in the field of solid state capacitors. Ho-doped SrTiO3 ceramics with the composition of Ho0.02Sr0.97TiO3 were prepared by the solid state reaction technique.
Xiaohua Zhang, Jie Zhang, Yuanyuan Zhou, Zhenxing Yue, Longtu Li   +4 more
openaire   +1 more source

Colossal permittivity in (Li + Nb) co-doped Fe2O3 ceramics

Current Applied Physics, 2020
Abstract (Li + Nb) co-doped (Li + Nb)xFe2-xO3 (with x = 0.0005, 0.005, 0.05, and 0.1) ceramics were prepared by sol-gel method. Their structural, dielectric, humidity, and magnetic properties were investigated. Colossal permittivity (~104) was approached or achieved in all doped samples even with a very small doping level of x = 0.0005.
Y.M. Fei, Q.Q. Wang, J. Sun, S.T. Wang, T.Y. Li, J. Wang, C.C. Wang   +6 more
openaire   +1 more source

Colossal dielectric permittivity in hydrogen-reduced rutile TiO2 crystals

Journal of Alloys and Compounds, 2017
Abstract (Nb + In) co-doped rutile TiO2 (TINO) ceramics have received considerable attention, due to their high dielectric permittivity (on the order of 10,000) and low loss factor (
Jinglei Li, Fei Li, Xuhui Zhu, Dabin Lin, Quanfu Li, Weihua Liu, Zhuo Xu   +6 more
openaire   +1 more source

Wireless power transfer system based on colossal permittivity resonators

2017 11th International Congress on Engineered Materials Platforms for Novel Wave Phenomena (Metamaterials), 2017
We proposed novel dielectric resonators with colossal permittivity e=1000 for wireless power transfer. Numerical simulation and experimental investigation of the WPT system efficiency are performed. The highest power transfer efficiency of 90% at 232 MHz is verified experimentally.
M. Song, P. Kapitanova
openaire   +1 more source

Colossal Permittivity Materials as Superior Dielectrics for Diverse Applications

Advanced Functional Materials, 2019
AbstractEver since the beginning of this century, many kinds of materials have been reported to demonstrate colossal permittivity (CP) or a colossal dielectric constant exceeding 103. Accordingly, such CP materials and their further modification and improvement to achieve enhanced CP performance for promising applications in modern electronics, sensors,
Yanbin Wang, Wenjing Jie, Chao Yang, Xianhua Wei, Jianhua Hao   +4 more
openaire   +2 more sources