期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 124, 期 4, 页码 -出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-018-1757-4
关键词
-
资金
- National Natural Science Foundation of China [11264010, 11564010, 51402196]
- Natural Science Foundation of Guangxi [GA139008, 2016GXNS-FDA380027]
- China Postdoctoral Science Foundation [2014M552229, 2015T80915]
(1 - x)K0.5Na0.5NbO3-x(Bi0.5Li0.5)ZrO3 (labeled as (1 - x)KNN-xBLZ) lead-free ceramics were fabricated by a solid-state reaction method. A research was conducted on the effects of BLZ content on structure, dielectric properties and relaxation behavior of KNN ceramics. By combining the X-ray diffraction patterns with the temperature dependence of dielectric properties, an orthorhombic-tetragonal phase coexistence was identified for x = 0.03, a tetragonal phase was determined for x = 0.05, and a single rhombohedral structure occurred at x = 0.08. The 0.92KNN-0.08BLZ ceramic exhibits a high and stable permittivity (similar to 1317, +/- 15% variation) from 55 to 445 degrees C and low dielectric loss (<= 6%) from 120 to 400 degrees C, which is hugely attractive for high-temperature capacitors. Activation energies of both high-temperature dielectric relaxation and dc conductivity first increase and then decline with the increase of BLZ, which might be attributed to the lattice distortion and concentration of oxygen vacancies.
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