期刊
CERAMICS INTERNATIONAL
卷 42, 期 4, 页码 4964-4977出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2015.12.009
关键词
Sintering; Grain size; Microstructure; Dielectric; Piezoelectricity; Ferroelectricity
资金
- Department of Science and Technology (DST) [SR/S3/ME/0012/2011]
- Centre for Nanotechnology (CNT), University of Hyderabad
The effects of sintering temperature on the structural, dielectric, piezoelectric and ferroelectric properties of sol gel derived lead-free 0.5Ba (Zr0.2Ti0.8)O-3-0.5(Ba0.7Ca0.3)TiO3 (BZT-BCT) piezoelectric ceramics have been reported in this manuscript. BZT-BCT ceramics sintered at 1550 degrees C for 2 h resulted in homogeneous and highly dense microstructure with similar to 96-97% of the theoretical density and grain size of similar to 10 mu m. The results indicated a strong influence of the sintering temperature on the structural, dielectric, piezoelectric and ferroelectric properties of BZT-BCT ceramics. BZT-BCT ceramics sintered at 1550 degrees C for 2 h resulted in high piezoelectric charge coefficient d(33)similar to 617 pC/N, large planar electromechanical coupling factor k(p) similar to 54%, large piezoelectric voltage constant g(33)similar to 11.5 mV m/N, high dielectric constant epsilon(r)similar to 5000, and a low tan delta similar to 0.019. The correlation of dielectric, piezoelectric and ferroelectric properties of the BZT-BCT ceramics with sintering temperature has been explained on the basis of grain size effect and motion of the 90 degrees domain walls. (C) 2015 Elsevier Ltd and Techna Group S.r.l. 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