期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 773, 期 -, 页码 853-859出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.09.340
关键词
Thin films; Sol-gel; Dielectric constant; Dielectric loss; Nonlinear coefficient
资金
- National Natural Science Foundation of China [51572113]
- State Key Laboratory of New Ceramic and Fine Processing Tsinghua University [KF201808]
This work firstly reported preparation of cobalt-doped CaCu3Ti4O12 (CCCTO) thin film by a sol-gel modified method. It was concluded that a relatively high dielectric constant epsilon' (2326, at 1 kHz), low dielectric loss tan delta (0.012, at 1 kHz) and high nonlinear coefficient proportional to (4.9) were simultaneously obtained in the CaCu2.95Co0.05Ti4O12 thin film at room temperature. The decrease of the dielectric loss was associated with the increase in the density of the insulating grain boundary layer, which was governed by the grain size reduction and densification of CCCTO films due to Co doping. Monovalent cation Cu(+ )detected by X-ray photoelectron spectroscopy (XPS) of the CaCu2.95Co0.05Ti4O12 thin film decreased leakage current. These excellent electrical properties provided a viable solution to the application of CCTO materials in capacitive-varistors. (C) 2018 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据