The Preparation and Properties of (Na0.5+xK0.5-2xLix)NbO3 Lead-Free Piezoelectric Ceramics

Hong Yun Ma; Yan Gai Liu; Jin Qiu Zhao; Zhao Hui Huang; Ming Hao Fang

doi:10.4028/www.scientific.net/KEM.602-603.826

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 602-603The Preparation and Properties of...

The Preparation and Properties of (Na_0.5+xK_0.5-2xLi_x)NbO₃ Lead-Free Piezoelectric Ceramics

Abstract:

In this paper, the KNN powders with Li⁺ substituted (K_0.5Na_0.5)⁺ were prepared by the sol-gel method in order to make powders pure, (Na_0.50+xK_0.50-2xL_ix) -NbO₃(x=0, 0.04, 0.06, 0.08) ceramics were prepared by pressureless sintering. The phase composition of powders was determined by XRD. The effects of the Li⁺ substitution on piezoelectric and ferroelectric properties of ceramics were systematically studied for determining optimal Li⁺ content. Li⁺ can significantly increase the piezoelectric constant of ceramic. When Li⁺ content was 0.04, piezoelectric properties of ceramics were the best, d₃₃=115 pC/N, P_r=6.35 μC/cm², E_c=14.24 kV/cm.

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Key Engineering Materials (Volumes 602-603)

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826-829

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https://doi.org/10.4028/www.scientific.net/KEM.602-603.826

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March 2014

Authors:

Hong Yun Ma, Yan Gai Liu, Jin Qiu Zhao, Zhao Hui Huang, Ming Hao Fang

Keywords:

Ferroelectric Properties, Perovskite Structure, Piezoelectric Constant, Sol-Gel Method

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