Results 151 to 160 of about 62,857 (189)

Colossal Permittivity in Niobium Doped BaTiO3 Ceramics Annealed in N2

Scripta Materialia, 2018
Abstract Nb5 + and/or In3 + doped BaTiO3 ceramics were prepared by a conventional solid-state method, followed by annealing in N2. At the room temperature and 1 kHz, permittivity of Nb5 + doped BaTiO3 (BTNb) is up to 80,888 and its dielectric loss is as low as 0.03.
Gaoyang Zhao, Pengrong Ren
exaly   +2 more sources

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

Origin of the colossal dielectric permittivity and magnetocapacitance in LuFe2O4

Journal of Applied Physics, 2011
We report the detailed study on the colossal dielectric constant and magnetocapacitance of LuFe2O4. The experimental results indicate that the large dielectric constant of LuFe2O4 is originated from two sources, (1) Maxwell Wagner-type contributions of depletion layers at grain boundaries and the interfaces between sample and contacts, (2) AC response ...
P. Ren, Z. Yang, W. G. Zhu, C. H. A. Huan, L. Wang   +4 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, 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

Origin of the colossal permittivity and possible application of CCT ceramics

Proceedings Electronic Components and Technology, 2005. ECTC '05., 2005
The coprecipitation, a "soft chemistry" method is used to elaborate different CCT powders. After sintering three main types of materials were obtained: a monophased consisting of the pure CCT phase, a biphased (CCT + CaTiO/sub 3/), and a three-phased (CCT + CaTiO/sub 3/ + copper oxide (CuO or Cu/sub 2/O)). Values of the relative permittivity up to 8 10/
T. Lebey, V. Bley, S. Guillemet, M. Boulos, B. Durand   +4 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

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 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

A review of the colossal permittivity of electronic conductors, specifically metals and carbons

Materials Research Bulletin, 2022
Abstract The colossal permittivity of electronic conductors (specifically metals and carbons) is reviewed. Relative permittivity (even 108) was predicted theoretically by Jonscher in 1999. The measured values that emerged in 2019 are up to 106.
D.D.L. Chung, Xiang Xi
openaire   +1 more source