TY - JOUR
T1 - Ultrahigh strain in site engineering-independent Bi0.5Na0.5TiO3-based relaxor-ferroelectrics
AU - Yin, Jie
AU - Zhao, Chunlin
AU - Zhang, Yuxing
AU - Wu, Jiagang
N1 - KAUST Repository Item: Exported on 2022-06-08
Acknowledgements: Authors gratefully acknowledge the support of the National Science Foundation of China (NSFC No. 51722208 and 51332003). Dr. Jürgen Rödel (Technische Universität Darmstadt, Darmstadt, Germany) is gratefully acknowledged for discussions on the interpretation of the composition-induced giant strain in BNT-based ferroelectric-relaxor materials. Thank the King Abdullah University of Science and Technology (KAUST) for PFM.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2018/2/6
Y1 - 2018/2/6
N2 - In the past, accompanied by the highly asymmetric bipolar strain-electric field (S-E) loop, the ultrahigh strain can be realized in bismuth sodium titanate (BNT)-based ceramics mainly by the B site doping, which seriously restricts the further opening of the research and application scope. Here, regardless of A or/and B sites doping, we observed an ultrahigh unipolar strain response (S = 0.53–0.56% and d33* = 883–933 pm/V, 60 kV/cm) in [Bi0.5(Na0.82-xK0.18Lix)0.5](1-y)Sry(Ti1-zTaz)O3 ceramics by chemical modifications, accompanied by the even higher unipolar strain (∼0.63%, 90 kV/cm) and large field signal (d33* = 990 pm/V, 50 kV/cm). Moreover, the symmetrical bipolar S-E loop is also obtained in this system. In particular, we strictly illuminate the origin of the composition-induced giant strain from the view of the microscopic (A-O bonds weakening), mesoscopic (the coexistence of metastable small-sized ferroelectric domain structures and ergodic relaxor phase), and macroscopic (Tf-r shifting) perspectives. We believe that this work can provide a simple but effective way to optimize the strain behavior in BNT-based ceramics.
AB - In the past, accompanied by the highly asymmetric bipolar strain-electric field (S-E) loop, the ultrahigh strain can be realized in bismuth sodium titanate (BNT)-based ceramics mainly by the B site doping, which seriously restricts the further opening of the research and application scope. Here, regardless of A or/and B sites doping, we observed an ultrahigh unipolar strain response (S = 0.53–0.56% and d33* = 883–933 pm/V, 60 kV/cm) in [Bi0.5(Na0.82-xK0.18Lix)0.5](1-y)Sry(Ti1-zTaz)O3 ceramics by chemical modifications, accompanied by the even higher unipolar strain (∼0.63%, 90 kV/cm) and large field signal (d33* = 990 pm/V, 50 kV/cm). Moreover, the symmetrical bipolar S-E loop is also obtained in this system. In particular, we strictly illuminate the origin of the composition-induced giant strain from the view of the microscopic (A-O bonds weakening), mesoscopic (the coexistence of metastable small-sized ferroelectric domain structures and ergodic relaxor phase), and macroscopic (Tf-r shifting) perspectives. We believe that this work can provide a simple but effective way to optimize the strain behavior in BNT-based ceramics.
UR - http://hdl.handle.net/10754/678751
UR - https://linkinghub.elsevier.com/retrieve/pii/S1359645418300855
UR - http://www.scopus.com/inward/record.url?scp=85041542545&partnerID=8YFLogxK
U2 - 10.1016/j.actamat.2018.01.054
DO - 10.1016/j.actamat.2018.01.054
M3 - Article
SN - 1359-6454
VL - 147
SP - 70
EP - 77
JO - Acta Materialia
JF - Acta Materialia
ER -