한국분말야금학회:학술대회논문집 (Proceedings of the Korean Powder Metallurgy Institute Conference)

한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
권호 표지

Effect of $Li_2O$ Addition on Piezoelectric Properties of NKN-5LT Ceramics

  • Kim, Min-Soo (Electric and Magnetic Devices Group, Korea Electrotechnology Research Institute) ;
  • Lee, Dae-Su (Electric and Magnetic Devices Group, Korea Electrotechnology Research Institute) ;
  • Park, Eon-Cheol (Electric and Magnetic Devices Group, Korea Electrotechnology Research Institute) ;
  • Jeong, Soon-Jong (Electric and Magnetic Devices Group, Korea Electrotechnology Research Institute) ;
  • Kim, In-Sung (Electric and Magnetic Devices Group, Korea Electrotechnology Research Institute) ;
  • Song, Jae-Sung (Electric and Magnetic Devices Group, Korea Electrotechnology Research Institute)
  • 발행 : 2006.09.24
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초록

As a candidate for lead-free piezoelectric materials, dense $95(Na_{0.5}K_{0.5})NbO_3-5LiTaO_3$ (NKN-5LT) ceramics were developed by conventional sintering process. Sintering temperature was lowered by adding $Li_2O$ as a sintering aid. The electrical properties of NKN-5LT ceramics were investigated as a function of $Li_2O$ concentration. At the addition of 1 mol% $Li_2O$, electromechanical coupling factor $(k_P)$ and piezoelectric coefficient $(d_{33})$ of NKN-5LT ceramics were found to reach the highest values of 0.37 and 250 pC/N, respectively.

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