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

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Low Temperature Sintering of BNKT Lead-Free Piezoelectric Ceramics Using CuO-Coated Na0.5Bi4.5Ti4O15 Templates

산화구리가 피복된 Na0.5Bi4.5Ti4O15 틀입자를 이용한 BNKT 무연 압전 세라믹스의 저온소성 연구

  • Jeong, Gwang-Hwi (School of Materials Science and Engineering, University of Ulsan) ;
  • Lee, Sang-Seop (School of Materials Science and Engineering, University of Ulsan) ;
  • Ahn, Chang Won (Department of Physics, 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)
  • 정광휘 (울산대학교 첨단소재공학부) ;
  • 이상섭 (울산대학교 첨단소재공학부) ;
  • 안창원 (울산대학교 물리학과) ;
  • 한형수 (울산대학교 첨단소재공학부) ;
  • 이재신 (울산대학교 첨단소재공학부)
  • Received : 2020.05.16
  • Accepted : 2020.07.13
  • Published : 2020.09.01
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Abstract

This study investigated the low temperature sintering with various templates of Bi-based lead-free piezoelectric ceramics. The effects of using CuO-coated Na0.5Bi4.5Ti4O15 templates on the sintering behavior as well as the dielectric, ferroelectric, and piezoelectric properties of Bi1/2(Na0.78K0.22)1/2TiO3 (BNKT) ceramics have been examined. In comparison with the specimens sintered with the Na0.5Bi4.5Ti4O15 templates without CuO coating, those sintered with the CuO-coated Na0.5Bi4.5Ti4O15 templates showed larger template sizes as well as a larger electric field induced strain (Smax/Emax) of 422 pm/V after sintering at temperatures as low as 975℃. These results are promising for low-cost multilayer ceramic actuator applications.

Keywords

References

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