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Dielectric and Piezoelectric Properties of (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 Ceramics as a Function of Sintering Temperature

소결온도 변화에 따른 (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 세라믹스의 유전 및 압전 특성

  • Lee, Kab-Soo (Department of Electrical Engineering, Semyung University) ;
  • Yoo, Ju-Hyun (Department of Electrical Engineering, Semyung University)
  • Received : 2013.11.07
  • Accepted : 2013.12.18
  • Published : 2014.01.01

Abstract

$(Ba_{0.85}Ca_{0.15})(Ti_{0.9}Zr_{0.1})O_3$ + 0.04 wt% $CeO_2$ lead-free ceramics were prepared by conventional oxide-mixed method and the effect of sintering temperature on microstructure, dielectric and piezoelectric properties were investigated. Improved piezoelectric properties have been observed at $1,400^{\circ}C$ sintering temperature which show the optimal electrical properties, $k_p{\sim}0.412$, $d_{33}{\sim}316pC/N$, $Q_m{\sim}144$, ${\varepsilon}_r{\sim}3,345$ and $T_c{\sim}85^{\circ}C$. These results show that the sintering temperature plays an important role in piezoelectric properties.

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