Enhanced Piezoelectric Properties of (Na0.535K0.485)0.905Li0.095(Nb0.94Ta0.06)O3-(Na0.5Bi0.5)TiO3 Lead-Free Piezoelectric Ceramics in the MPB Composition
In this paper,end members of tetragonal phase (Na0.535K0.485)0.905Li0.095(Nb0.94Ta0.06)O3 (abbreviated as NKLN) and rhombohedral phase (Na0.5Bi0.5)TiO3 (abbreviated as NBT) were used to fabricate dense (1-x)NKLN-xNBT (x=0,0.005,0.01,0.02,0.03,0.04) lead-free piezoelectric ceramics.By increasing the NBT content x value,the crystalline structure changes from tetragonal phase to rhombohedral one across a morphotropic phase boundary (MPB) composition of x=0.02.In this MPB composition,enhanced electrical properties were obtained as follows:piezoelectric constant d33=202 pC/N,planar electromechanical coupling coefficient kp-39.6%,relative dielectric constant εr=1020 and dielectric loss tgδ=2.67%,indicating that this ceramic was a promising lead-free piezoelectric material for practical applications.
Piezoelectric ceramics Lead free KNN MPB
Zong-Yang Shen Zu-Gui Xiao Yue-Ming Li Zhu-Mei Wang Yan Hong
School of Materials Science and Engineering,Jiangxi Key Laboratory of Advanced Ceramic Materials,Jingdezhen Ceramic Institute,Jingdezhen 333403,China
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
1390-1394
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）