Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5440717 | Journal of the European Ceramic Society | 2017 | 4 Pages |
Abstract
LiCuNb3O9 ceramics with the distorted cubic perovskite structure were prepared by a solid-state reaction method. The ceramic exhibited a very large value of permittivity (â¼4.4Â ÃÂ 104 at 100Â kHz) at room temperature (â¼300Â K) and a low-temperature dielectric relaxation behaviour following the Arrhenius law. The origin of the giant dielectric response of the LiCuNb3O9 ceramics was correlated with the structure of the ceramics. The barrier layers in the grain boundaries and the mixed-valent structure of Cu+/Cu2+ were found to contribute to the giant permittivity of the ceramics and confirmed by X-ray spectroscopy and complex impedance spectroscopy analyses.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Xiuli Chen, Dandan Ma, Fen He, Guisheng Huang, Huanfu Zhou,