title: Superior Piezoelectric Properties in Potassium-Sodium Niobate Lead-Free Ceramics.
abstract: A superior piezoelectric coefficient (d33= 570 ± 10 pC N"1), the highest value reported to date in potassium-sodium niobate-based ceramics, is obtained in (1-x-y)K1-wNawNb1-zSbzO3-yBaZrO3-x- Bi0.5K0.5HfO3ceramics. This high d33value can be ascribed to the co-existence of "nano-scale strain domains" (1-2 nm) and a high density of ferroelectric domain boundaries. Therefore, ternary KNN-based ceramics demonstrate the potential for applications.
authors.affiliation: Department of Materials Science, Sichuan University, 610064, Chengdu, P. R. China.
authors.forename: Kai
authors.initials: K
authors.lastname: Xu
authors.affiliation: Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 239955, Kingdom of Saudi Arabia.
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of Materials Science, Sichuan University, 610064, Chengdu, P. R. China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Lv
authors.affiliation: Department of Materials Science, Sichuan University, 610064, Chengdu, P. R. China. wujiagang0208@163.com, msewujg@scu.edu.cn.
authors.forename: Jiagang
authors.initials: J
authors.lastname: Wu
authors.affiliation: Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 239955, Kingdom of Saudi Arabia. xixiang.zhang@kaust.edu.sa.
authors.forename: Xixiang
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Materials Science, Sichuan University, 610064, Chengdu, P. R. China.
authors.forename: Dingquan
authors.initials: D
authors.lastname: Xiao
authors.affiliation: Department of Materials Science, Sichuan University, 610064, Chengdu, P. R. China.
authors.forename: Jianguo
authors.initials: J
authors.lastname: Zhu
keywords: (K,Na)NbO3; giant piezoelectricity; nanodomains; phase boundaries