Comparison of Ferroelectric and Strain Properties between BaTiO3- and BaZrO3-Modified Bi1/2(Na0.82K0.18)1/2TiO3 Ceramics

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概要

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• Effects of BaTiO3 (BT) and BaZrO3 (BZ) modification on the crystal structure and electromechanical properties of lead-free Bi1/2(Na0.82K0.18)1/2TiO3 (BNKT) ceramics were compared within a doping range of 0--5 mol %. The differences between BT- and BZ-modification effects were clearly observed in polarization and electric field-induced strain hysteresis loops. BZ-modification induced a gradual transition from a ferroelectric to a nonpolar phase, resulting in an abnormal enhancement in the electric field-induced strain (EFIS) just after the transition. However, all BT-modified specimens showed strong ferroelectricity without abnormal enhancement in EFIS. The results suggest that Zr doping-induced B-site strains play a significant role in the ferroelectric-to-nonpolar phase transition in the Bi-perovskite.

• 2012-09-25

著者

• Kim Ill-won

  Department Of Physics Ulsan University

• Hussain Ali

  School of Nano & Advanced Materials Engineering, Changwon National University, Changwon 641-773, Republic of Korea

• Lee Jae-Shin

  School of Materials Science and Engineering, University of Ulsan, Ulsan 680-749, Republic of Korea

• Ahn Chang-Won

  Department of Physics, University of Ulsan, Ulsan 680-749, Republic of Korea

• Tran Vu

  School of Materials Science and Engineering, University of Ulsan, Ulsan 680-749, Republic of Korea

• Han Hyoung-Su

  School of Materials Science and Engineering, University of Ulsan, Ulsan 680-749, Republic of Korea

• Dinh Thi

  School of Materials Science and Engineering, University of Ulsan, Ulsan 680-749, Republic of Korea

関連論文

• Influence of Low Frequency Dielectric Dispersion on the Phase Transition for the Pulsed Laser-Deposited SrBi_2Ta_2O_9 Thin Film
• Effects of Hafnium Substitution on Dielectric and Electromechanical Properties of Lead-free Bi0.5(Na0.78K0.22)0.5(Ti1-xHfx)O3 Ceramics
• Comparison of Ferroelectric and Strain Properties between BaTiO3- and BaZrO3-Modified Bi1/2(Na0.82K0.18)1/2TiO3 Ceramics

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