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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Piezoelectric Properties of Lead-Free (K0.5Na0.5)NbO3 Ceramics Added with ZnO and MnO2

ZnO와 MnO2를 동시에 첨가한 (K0.5Na0.5)NbO3 세라믹스의 압전 특성에 대한 연구

  • Hong, Young Hwan (School of Materials Science and Engineering, University of Ulsan) ;
  • Park, Young-Seok (School of Materials Science and Engineering, University of Ulsan) ;
  • Jeong, Gwang-Hwi (School of Materials Science and Engineering, University of Ulsan) ;
  • Cho, Sung Youl (School of Materials Science and Engineering, University of Ulsan) ;
  • Lee, Jae-Shin (School of Materials Science and Engineering, University of Ulsan)
  • 홍영환 (울산대학교 첨단소재공학부) ;
  • 박영석 (울산대학교 첨단소재공학부) ;
  • 정광휘 (울산대학교 첨단소재공학부) ;
  • 조성열 (울산대학교 첨단소재공학부) ;
  • 이재신 (울산대학교 첨단소재공학부)
  • Received : 2016.03.06
  • Accepted : 2016.03.23
  • Published : 2016.04.01
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Abstract

We investigated the sintering behavior and piezoelectric properties of lead-free $(K_{0.5}Na_{0.5})NbO_3$ ceramics co-doped with excess 0.01 mol ZnO and x mol $MnO_2$, where x was varied from 0 to 0.03. Excess $MnO_2$ addition was found to retard the grain growth and densification during sintering. However, 0.005 mol $MnO_2$ addition improved the piezoelectric properties of 0.01 mol ZnO added $(K_{0.5}Na_{0.5})NbO_3$ ceramics. The planar mode piezoelectric coupling coefficient, electromechanical quality factor, and piezoelectric constant $d_{33}$ of 0.01 mol ZnO and 0.005 mol $MnO_2$ added specimen were 0.40, 304, and 214 pC/N, respectively.

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References

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