Journal ArticleDOI
Colossal dielectric permittivity in (Al + Nb) co-doped rutile SnO2 ceramics with low loss at room temperature
Yongli Song,Xianjie Wang,Xingquan Zhang,Xudong Qi,Zhiguo Liu,Lingli Zhang,Yu Zhang,Yang Wang,Yu Sui,Bo Song +9 more
Reads0
Chats0
TLDR
In this paper, the authors reported massive dielectric permittivity (CP) in (Al + Nb) co-doped rutile SnO2 ceramics with a low dielectoric loss at room temperature.Abstract:
The exploration of colossal dielectric permittivity (CP) materials with low dielectric loss in a wide range of frequencies/temperatures continues to attract considerable interest. In this paper, we report CP in (Al + Nb) co-doped rutile SnO2 ceramics with a low dielectric loss at room temperature. Al0.02Nb0.05Sn0.93O2 and Al0.03Nb0.05Sn0.92O2 ceramics exhibit high relative dielectric permittivities (above 103) and low dielectric losses (0.015 < tan δ < 0.1) in a wide range of frequencies and at temperatures from 140 to 400 K. Al doping can effectively modulate the dielectric behavior by increasing the grain and grain boundary resistances. The large differences in the resistance and conductive activation energy of the grains and grain boundaries suggest that the CP in co-doped SnO2 ceramics can be attributed to the internal barrier layer capacitor effect.read more
Citations
More filters
Journal ArticleDOI
Colossal permittivity of (Mg + Nb) co-doped TiO2 ceramics with low dielectric loss
TL;DR: In this paper, the room-temperature dielectric properties of pure homogenous ceramics of rutile (Mg + Nb) co-doped TiO2 were investigated.
Journal ArticleDOI
(Al3+, Nb5+) co–doped CaCu3Ti4O12: An extended approach for acceptor–donor heteroatomic substitutions to achieve high–performance giant–dielectric permittivity
TL;DR: In this paper, the authors show the importance of grain boundary properties for controlling the nonlinear and giant-dielectric properties of CaCu3Ti4O12 ceramics, supporting the internal barrier layer capacitor model of Schottky barriers at grain boundaries.
Journal ArticleDOI
Enhanced relative permittivity in niobium and europium co-doped TiO2 ceramics
TL;DR: In this article, a large permittivity and low dielectric loss were observed for (Eu 0.5Nb0.5)xTi1-xO2 ceramics with Niobium and europium ions.
Journal ArticleDOI
Multiple Interfacial Fe3O4@BaTiO3/P(VDF-HFP) Core-Shell-Matrix Films with Internal Barrier Layer Capacitor (IBLC) Effects and High Energy Storage Density.
Ling Zhou,Qiuyun Fu,Fei Xue,Xiahui Tang,Dongxiang Zhou,Yahui Tian,Geng Wang,Chaohong Wang,Haibo Gou,Lei Xu +9 more
TL;DR: This work explored an effective approach to prepare dielectric nanocomposites for energy storage applications experimentally and theoretically and adopted a Maxwell-Wagner capacitor model.
Journal ArticleDOI
Colossal permittivity and impedance analysis of tantalum and samarium co-doped TiO2 ceramics
Xianwei Wang,Zhang Bihui,Gaohang Shen,L. Y. Sun,Yanchun Hu,Shi Linxin,X. W. Wang,Chuang Jie,Liuju Zhang +8 more
TL;DR: In this paper, the TSTO ceramics were fabricated by a standard solid-state reaction and the X-ray diffraction (XRD) spectra revealed a tetragonal rutile TiO 2 structure.
References
More filters
Journal ArticleDOI
Optical Response of High-Dielectric-Constant Perovskite-Related Oxide
TL;DR: Optical conductivity measurements on the perovskite-related oxide CaCu3Ti4O12 provide a hint of the physics underlying the observed giant dielectric effect in this material, suggesting the presence of a strong absorption at very low frequencies due to dipole relaxation.
Journal ArticleDOI
CaCu3Ti4O12: One-step internal barrier layer capacitor
TL;DR: Subramanian et al. as discussed by the authors attributed the giant-dielectric phenomenon to a grain boundary (internal) barrier layer capacitance (IBLC) instead of an intrinsic property associated with the crystal structure.
Journal ArticleDOI
High performance ferroelectric relaxor-PbTiO3 single crystals: Status and perspective
Shujun Zhang,Fei Li,Fei Li +2 more
TL;DR: In this paper, a perspective and future development of relaxor-PbTiO3 (PT) piezoelectric materials are given. And the physical origins and unique loss characteristics in relaxorPT crystals are discussed with respect to their crystal structure.
Journal ArticleDOI
Electron-pinned defect-dipoles for high-performance colossal permittivity materials
Wanbiao Hu,Yun Liu,Raymond Withers,Terry J. Frankcombe,Lasse Noren,Amanda Snashall,Melanie Kitchin,Paul N. Smith,Bill Gong,Hua Chen,Jason Schiemer,Frank Brink,Jennifer Wong-Leung +12 more
TL;DR: A new electron-pinned, defect-dipole route to ideal CP behaviour is proposed, where hopping electrons are localized by designated lattice defect states to generate giant defect-Dipoles and result in high-performance CP materials.
Journal ArticleDOI
Giant dielectric permittivity observed in Li and Ti doped NiO.
TL;DR: It is suggested that the giant dielectric constant response of the doped NiO could be enhanced by a grain boundary-layer mechanism as found in boundary- layer capacitors as for that yielding ferroelectrics.