Giant electric field-induced strain at room temperature in LiNbO3-doped 0.94(Bi0.5Na0.5)TiO3-0.06BaTiO3 |
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| Affiliation: | 1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, PR China;2. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, PR China;3. Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA;1. Key Laboratory for Macromolecular Science of Shaanxi Province, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, 710062, Shaanxi, People?s Republic of China;2. College of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang 712000, Shaanxi, People?s Republic of China;1. School of Advanced Material Engineering, Changwon National University, 9 Sarim-Dong, Gyeongnam 641-773, Republic of Korea;2. Department of Physics, Changwon National University, Gyeongnam 641-773, Republic of Korea;1. State Key Laboratory of Materials–Orient Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, PR China;2. Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), PR China;1. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China;2. Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China;3. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;1. Laboratoire d’étude et développement des matériaux semiconducteurs et diélectriques, Université de Laghouat, Route de Ghardaïa B.P.37G, Laghouat, Algeria;2. Laboratoire des Matériaux et Procédés, Université de Valenciennes et du Hainaut-Cambrésis, Z.I du Champ de l’Abbesse, 59600 Maubeuge, France;3. Laboratoire des Matériaux Ferroélectriques, Unité de Physique Mathématiques et Applications, Faculté des Sciences de Sfax, Université de Sfax, BP. 1171, 3000 Sfax, Tunisia |
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| Abstract: | We report experimental investigation on the ferroelectricity and electric field-induced strain response in LiNbO3-doped 0.94(Bi0.5Na0.5)TiO3-0.06BaTiO3 (BNT-BT) piezoelectric ceramics. At room temperature, a large strain of 0.6% (at 70 kV/cm) is achieved in the 2.5%-LiNbO3-doped BNT-BT, higher than that of commercially-utilized Pb(Zr,Ti)O3. The corresponding piezoelectric coefficient d*33 reaches 857 pm/V, which is high among these of BNT-based ceramics at room temperature. Further study indicates that the superior piezoelectric properties are realized at the ferroelectric-relaxor transition temperature TF-R, which is pushed to room temperature with 2.5% LiNbO3 doping. This indicates that large electromechanical response can be induced via delicate mixing of the ferroelectric rhombohedral phase and the polar nanoregions (PNRs) relaxor-ferroelectric tetragonal phase. |
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| Keywords: | Electric field-induced strain Lead-free piezoelectric |
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