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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.116  No.1352 (April) (2008)  >  pp.536-539

Journal of the Ceramic Society of Japan
<<Previous article Vol.116  No.1352 (April) (2008)   pp.536 - 539 Next article>>

Microstructure and properties of lithium and antimony modified potassium sodium niobate lead-free piezoelectric ceramics

Yong SUN1), Dingquan XIAO1), Lang WU1)2), Dunmin LIN1), Jianguo ZHU1), Ping YU1), Xiang LI1), Yuanyu WANG1), Yan LI3), Yanzheng LIN3), Yan ZHUANG3) and Qun WEI3)
1) School of Material Science and Engineering, Sichuan University
2) School of Material Science and Engineering, Southwest University of Science and Technology
3) GCI Science & Technology Co., Ltd.


  (K0.52Na0.48)1-xLix (Nb1-xSbx)O3 lead-free ceramics were prepared by solid state reaction and the electrical properties of the ceramics were characterized. The crystalline phases and microstructure of the ceramics exhibit much dependence on the content of x, and the orthorhombic and tetragonal phases of the samples coexisted in the composition range of 0.04 ≤ x ≤ 0.05 at room temperature. The ceramics with x = 0.05 show the better die-, piezo- and ferroelectric properties: piezoelectric constant d33 = 303 pC/N, planar electromechanical coupling coefficient kp = 0.50, the relative dielectric constant K = 1228, syntonic impedance Rr = 66.1Ω, remnant polarization Pr = 31.2 μC/cm2, and coercive field Ec = 0.770 kV/mm.


Keyword:
Piezoelectric ceramics, Lead-free, Microstructure, Electrical properties

Received: November 15, 2007
Accepted: February 21, 2008 , Published online: April 01, 2008
Copyright (c) 2008 The Ceramic Society of Japan

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