Results 161 to 170 of about 2,269 (194)

Electronic structure of colossal permittivity (Mg1/3Nb2/3)0.05Ti0.95O2 ceramics

Ceramics International, 2018
Abstract A systematic investigation on the dielectric and electronic structure of Mg2+/Nb5+ co−doped rutile−TiO2 ceramics was performed. The (Mg1/3Nb2/3)0.05Ti0.95O2 ceramic was prepared by a solid state reaction method and sintered at 1350 °C for 2 h. Pure rutile−TiO2 phase was detected in the sintered ceramic with highly dense microstructure.
Nateeporn Thongyong, Pornjuk Srepusharawoot, Wattana Tuichai, Narong Chanlek, Vittaya Amornkitbamrung, Prasit Thongbai   +5 more
openaire   +1 more source

Dielectric properties of (Bi0.5Nb0.5) Ti1-O2 ceramics with colossal permittivity

Journal of Alloys and Compounds, 2017
Abstract The (Bi 0.5 Nb 0.5 ) x Ti 1- x O 2 (BNTO, 0 ≤  x  ≤ 0.05) ceramics were synthesized by a standard conventional solid-state reaction. The effects of sintering temperature and composition x on the crystal structure, microstructure, and dielectric properties of BNTO ceramics were investigated. A pure rutile phase is achieved as x  ≤ 0.01,
Yuechan Song, Peng Liu, Xiaogang Zhao, Baochun Guo, Xiulei Cui   +4 more
openaire   +1 more source

The self-compensation mechanism in barium titanate ceramics with colossal permittivity

Journal of Alloys and Compounds, 2021
Abstract Based on adjusting the relationship between polarization and charge carriers, barium titanate (BaTiO3) ceramics with colossal permittivity and high insulation resistivity are prepared by solid-state reaction approach. Modified by reducing atmosphere (0.1%H2/N2) and donor-ions doping, different polarization modes are discussed via treatment ...
Kai Zhang, Lingxia Li, Menglong Wang, Weijia Luo, Wenbo Wang   +4 more
openaire   +1 more source

Novel Layered Iridate Ba7Ir3O13+�� Thin Films with Colossal Permittivity

2015
Ba7Ir3O13+ in thin film form is discovered. These films are characterized by colossal permittivity (CP) ~104 at room temperature, attributable to the colossal internal barrier layer capacitance effect at atomically thin domain boundaries. These findings suggest a new route to seeking novel CP materials through designing atomically thin domain ...
Miao, Ludi, Xin, Yan, Liu, Jinyu, Zhu, Huiwen, Xu, Hong, Talbayev, Diyar, Stanislavchuk, Taras, Sirenko, Andrei, Puli, Venkata, Mao, Zhiqiang   +9 more
openaire   +1 more source

Colossal permittivity and dielectric relaxations in BaTi0.99(Nb0.5Ga0.5)0.02O3 ceramics

Ceramics International, 2015
Dielectric properties of pure phase BaTi0.99(Nb0.5Ga0.5)(0.02)O-3 ceramics, prepared via a conventional solid-state method, have been studied in the frequency range 0.01 Hz-10 MHz, at temperatures 130 degrees C to 200 degrees C. Colossal dielectric constant, epsilon(r)similar to 2 x 10(5), and low dielectric loss, tan delta similar to 0.05 at 1 kHz ...
Ying Wu, Jiyuan Miao, Zhifu Liu, Yongxiang Li   +3 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 and relevant mechanism of Bi2/3Cu3Ti4O12 ceramics

Ceramics International, 2016
Abstract Bi 2/3 Cu 3 Ti 4 O 12 (BCTO) ceramics with pure perovskite phase were successfully prepared by traditional solid-state reaction technique. Uniformly distributed and dense grains with the grain size of 2–3 μm were observed by SEM. A giant low-frequency dielectric permittivity of ~3.3×10 5 was obtained.
Longhai Yang, Gemeng Huang, Tingting Wang, Hangfei Hao, Ye Tian   +4 more
openaire   +1 more source

Colossal dielectric permittivity in CuCrO2 ceramics

Chinese Journal of Physics, 2022
Chao Cheng, Yuanmiao Xie, Pengfei Chen, Yi Yu, Shouguo Huang, Yide Li, Chunchang Wang   +6 more
openaire   +1 more source

Colossal dielectric permittivity in (Al+Nb) co-doped Ba0.4Sr0.6TiO3 ceramics

Ceramics International, 2019
Abstract Stimulated by the outstanding colossal permittivity behavior achieved in trivalent and pentavalent cations co-doped rutile TiO2 ceramics, the co-doping effects on the dielectric behavior of Ba0.4Sr0.6TiO3 ceramics were further explored. In this work, (Al + Nb) co-doped Ba0.4Sr0.6TiO3 ceramics were synthesized via a standard solid state ...
Bing Liu, Yu Hui Huang, Cheng Chao Hu, Kai Xin Song, Yong Jun Wu   +4 more
openaire   +1 more source

Wireless power transfer based on dielectric resonators with colossal permittivity

Applied Physics Letters, 2016
Magnetic resonant wireless power transfer system based on dielectric disk resonators made of colossal permittivity (ε = 1000) and low loss (tan δ = 2.5 × 10–4) microwave ceramic is experimentally investigated. The system operates at the magnetic dipole mode excited in the resonators providing maximal power transfer efficiency of 90% at the frequency ...
Mingzhao Song, Pavel Belov, Polina Kapitanova   +2 more
openaire   +1 more source