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;Park, Young-Seok;Jeong, Gwang-Hwi;Cho, Sung Youl;Lee, Jae-Shin

  • Received : 2016.03.06
  • Accepted : 2016.03.23
  • Published : 2016.04.01


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.


Lead-free piezoelectric;Sintering aid;Ferroelectric;Potassium sodium niobate


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