Published in
American Institute of Physics, Applied Physics Letters, 2(103), p. 022906
DOI: 10.1063/1.4813420
Links
Tools
Large Strain Under a Low Electric Field in Lead-Free Bismuth-Based Piezoelectrics
,
Chang Won Ahn,
Amir Ullah,
Ill Won Kim,
Ill Won Kim
Full text: Download
Abstract
In this letter, the composition and electric field dependent strain behavior of (1 − x)Bi0.5(Na0.78K0.22)0.5TiO3-xBi(Mg0.5Ti0.5)O3 (BNKT-BMT) were investigated to develop lead-free piezoelectric materials with a large strain response at a low driving field for actuator applications. A large strain of 0.35% (Smax/Emax = 636 pm/V) at an applied field of 55 kV/cm was obtained with a composition of 4 mol. % BMT. In particular, the electric field required to deliver large strains was reduced to a level that revealed not only a large Smax/Emax of 542 pm/V at a driving field as low as 35 kV/cm, but also remarkably suppressed the large hysteresis.