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Dielectric and Piezoelectric Properties of Low Temperature Sintering (Na,K,Li)(Nb,Sb,Ta)O3 Ceramics Doped with SnO2

SnO2가 첨가된 저온소결 (Na,K,Li)(Nb,Sb,Ta)O3계 세라믹스의 유전 및 압전 특성

  • Lee, Gwang-Min (Department of Electrical Engineering, Semyung University) ;
  • Yoo, Ju-Hyun (Department of Electrical Engineering, Semyung University) ;
  • Lee, Ji-Young (Department of Computer Science, Semyung University)
  • 이광민 (세명대학교 전기공학과) ;
  • 류주현 (세명대학교 전기공학과) ;
  • 이지영 (세명대학교 컴퓨터공학부)
  • Received : 2015.09.10
  • Accepted : 2015.10.08
  • Published : 2015.11.01

Abstract

In this paper, in order to develop excellent Pb-free composition ceramics for ultrasonic sensor. The $SnO_2$-doped ($Na_{0.525}K_{0.443}Li_{0.037})(Nb_{0.883}Sb_{0.08}Ta_{0.037})O_3$)(abbreviated as NKL-NST) ceramics have been synthesized using the ordinary solid state reaction method. The effect of $SnO_2$-doping on their dielectric and piezoelectric properties was investigated. The ceramics doped with 0 wt% $SnO_2$ have the optimum values of piezoelectric constant($d_{33}$), piezoelectric figure of merit($d_{33}.g_{33}$), planar piezoelectric coupling coefficient($k_p$) and density : $d_{33}=195[pC/N]$, $d_{33}.g_{33}=5.62pm^2/N.kp=0.40$, $density=4.436[g/cm^3]$. suitable for duplex ultrasonic sensor application.

Keywords

$SnO_2$;NKN;Lead-free piezoelectric

Acknowledgement

Supported by : 세명대학교

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