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Ferroelectrics Volume 474, 2015 - Issue 1
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Original Articles

Role of Sintering Temperature on Giant Field-Induced Strain in Lead-Free Bi0.5(Na,K)0.5TiO3-Based Ceramics

Dang Duc DungDepartment of General Physics, School of Engineering Physics, Ha Noi University of Science and Technology, 1 Dai Co Viet road, Ha Noi, Viet NamCorrespondence[email protected]
,
Nguyen Van QuyetHanautech Co., Ltd., 832, Tamnip-dong, Yuseong-gu, Daejeon, Republic of Korea
&
Luong Huu BacDepartment of Optics and Optoelectronics, School of Engineering Physics, Ha Noi University of Science and Technology, 1 Dai Co Viet road, Ha Noi, Viet Nam
Pages 113-119 | Accepted 04 Jun 2014, Published online: 26 Feb 2015
 
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Abstract

The effect of sintering temperature on the giant electric field-induced strain was observed in lead-free Bi0.5(Na0.77 Li0.05K0.18)0.5(Ti0.975Ta0.025)O3 ceramics. The grains size and dense structure increased with increasing of the sintering temperature. The growth of polar phases was observed in non-polar phase when sintering temperature increased. The giant electric field-induced strain strongly enhanced up to Smax/Emax = 800 pm/V, resulting from coexistence of polar and non-polar phases. The highest values of Smax/Emax were higher than those were previously reported on non-textured lead-free piezoelectric ceramics.

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