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Electrical Properties of (Ba,Ca)(Ti,Zr)O3 Ceramics for Bimorph-type Piezoelectric Actuator
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  • Electrical Properties of (Ba,Ca)(Ti,Zr)O3 Ceramics for Bimorph-type Piezoelectric Actuator
  • Electrical Properties of (Ba,Ca)(Ti,Zr)O3 Ceramics for Bimorph-type Piezoelectric Actuator
저자명
Shin. Sang-Hoon,Yoo. Ju-Hyun
간행물명
Transactions on electrical and electronic materials
권/호정보
2014년|15권 4호|pp.226-229 (4 pages)
발행정보
한국전기전자재료학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

In this study, lead-free $(Ba_{0.85}Ca_{0.15})(Ti_{1-x}Zr_x)O_3$ ceramics and a bimorph-type piezoelectric actuator were fabricated using the normal oxide-mixed sintering method, and their dielectric properties, microstructure, and displacement properties were investigated. From the results of X-ray diffraction, the pattern of the specimen has a pure perovskite structure. In addition, no secondary impurity phases were found. The excellent piezoelectric coefficient of $d_{33}=454pC/N$, the electromechanical coupling factor $k_p=0.51$, the dielectric constant ${varepsilon}_r=3,657$, the mechanical quality factor $Q_m=239$, and $T_c$(Tetragonal-Cubic) =$90^{circ}C$ were shown at x= 0.085. ${Delta}k_p/k_p20^{circ}C$ and ${Delta}f_r/f_r20^{circ}C$ showed the maximum value of -0.255 and 0.111 at $-20^{circ}C$ and $80^{circ}C$, respectively. The maximum total-displacement was $60{mu}m$ under the input voltage of 50 V. As a result, it is considered that lead-free $(Ba_{0.85}Ca_{0.15})(Ti_{1-x}Zr_x)O_3$ ceramics is a promising candidate for piezoelectric actuator application for x= 0.085.