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Ferroelectrics Volume 460, 2014 - Issue 1
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Original Articles

Dielectric and Piezoelectric Properties of (Na0.525K0.4425Li0.0375)(Nb0.9625Ta0.0375)O3 Ceramics Substituted with Sb

Kabsoo Lee Department of Electrical Engineering, Semyung University, Jechon, Chungbuk, Korea
,
Youseok Kim Department of Electrical Engineering, Semyung University, Jechon, Chungbuk, Korea
,
Sanghoon Shin Department of Electrical Engineering, Semyung University, Jechon, Chungbuk, Korea
&
Juhyun Yoo Department of Electrical Engineering, Semyung University, Jechon, Chungbuk, Korea
Pages 179-186 | Received 31 Jul 2013, Published online: 28 Feb 2014
 
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Abstract

In this study, lead-free Sb substituted (Na0.525K0.4425Li0.0375)(Nb0.9625Ta0.0375)O3 ceramics were synthesized by traditional solid state sintering process. The effects of Sb substitution on the dielectric and piezoelectric properties were investigated in order to develop excellent lead-free piezoelectric ceramics. The (Na0.525K0.4425Li0.0375)(Nb0.9625-xSbxTa0.0375)O3 ceramics with x = 0.065 showed excellent piezoelectric properties. The piezoelectric constant (d33), electromechanical coupling factor (kp), dielectric constant (ϵr) and density were optimized as 193 pC/N, 50.25%, 703 and 4.48 g/cm3, respectively.

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