한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제35권5호
  • /
  • Pages.516-521
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  • 2022
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  • 1226-7945(pISSN)
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  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
권호 표지
DOI QR코드

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BaTiO3 첨가에 따른 Bi1/2Na1/2TiO3-SrTiO3 무연 압전 세라믹스의 전기적 특성 및 상전이 거동 연구

Electrical Properties and Phase Transition Behavior of Lead-Free BaTiO3-Modified Bi1/2Na1/2TiO3-SrTiO3 Piezoelectric Ceramics

  • Kang, Yubin (School of Materials Science and Engineering, University of Ulsan) ;
  • Park, Jae Young (School of Materials Science and Engineering, University of Ulsan) ;
  • Devita, Mukhllishah Aisyah (School of Materials Science and Engineering, University of Ulsan) ;
  • Duong, Trang An (School of Materials Science and Engineering, University of Ulsan) ;
  • Ahn, Chang Won (Department of Physics and Energy Harvest Storage Research Center (EHSRC), University of Ulsan) ;
  • Kim, Byeong Woo (Department of Electrical Engineering, University of Ulsan) ;
  • Han, Hyoung-Su (School of Materials Science and Engineering, University of Ulsan) ;
  • Lee, Jae-Shin (School of Materials Science and Engineering, University of Ulsan)
  • 투고 : 2022.07.12
  • 심사 : 2022.07.29
  • 발행 : 2022.09.01
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초록

We investigated the microstructure, crystal structure, dielectric, and elecromechanical strain properties of lead-free BaTiO3 (BT)-modified (Bi1/2Na1/2)TiO3-SrTiO3 (BNT-ST) piezoelectric ceramics. Samples were prepared by a conventional ceramic processing route. Temperature dependent dielectric properties confirmed that a phase transition from a nonergodic relaxor to an ergodic relaxor was induced when the BT concentration reached 1.5 mol%, interestingly, where the average grain size reached a maximum value of 4.5 ㎛. At the same time, enhanced electromechanical strain (Smax/Emax = 600 pm/V) was obtained. It is suggested that the induced ferroelectric-relaxor phase transition by the BT modification is responsible for the enhancement of electromechanical strain in 1.5 mol% BT-modified BNT-ST ceramics.

키워드

과제정보

본 연구는 한국수력원자력(주)과 울산광역시의 2021년도 지원으로 수행되었으며, 이에 감사드립니다.

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