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Ferroelectrics Volume 487, 2015 - Issue 1: Proceedings of The 9th Asian Meeting on Ferroelectrics (AMF-9) and The 9th Asian Meeting on Electroceramics (AMEC-9) (AMF-AMEC-2014)
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Original Articles

Enhanced Low-Field Strain in Bi-Based Lead-Free Ferroelectric-Relaxor Composites

Thi hinh DinhSchool of Materials Science and Engineering, University of Ulsan, Nam-Ulsan680-749, South Korea
,
Chang-Ho YoonSchool of Materials Science and Engineering, University of Ulsan, Nam-Ulsan680-749, South Korea
,
Jin-Kyu KangSchool of Materials Science and Engineering, University of Ulsan, Nam-Ulsan680-749, South Korea
,
Young-Hwan HongSchool of Materials Science and Engineering, University of Ulsan, Nam-Ulsan680-749, South Korea
&
Jae-Shin LeeSchool of Materials Science and Engineering, University of Ulsan, Nam-Ulsan680-749, South KoreaCorrespondence[email protected]
Pages 142-148 | Received 26 Oct 2014, Accepted 26 Jan 2015, Published online: 23 Dec 2015
 
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Abstract

To improve the strain properties of Bi-based lead-free ceramics at lower electric fields, ferroelectric 0.82(Bi1/2Na1/2)TiO3-0.18(Bi1/2K1/2)TiO3 (BNKT) seed particles were embedded in Bi0.5(Na0.385K0.09Li0.025)(Ti0.975Ta0.025)O3 (BNKLTT) ceramics exhibiting relaxor behaviour using a conventional solid-state reaction. The unipolar strain versus electric field hysteresis loops of the BNKT-BNKLTT composites resulted in a maximum Smax/Emax of 761 pm/V at 4 kV/mm when 30 wt.% BNKT particles were added, which was higher than that of the single ferroelectric or relaxor phase.

Funding

This study was supported financially by the 2014 Research Fund of the University of Ulsan.

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