Superior Piezoelectric Properties in Potassium-Sodium Niobate Lead-Free Ceramics
1Department of Materials Science, Sichuan University, 610064, Chengdu, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|July 22, 2016
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-w Naw Nb1-z Sbz O3-y BaZrO3-x - Bi0.5 K0.5 HfO3 ceramics. This high d33 value 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.
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