Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Study on Piezoelectric Characteristics of Piezoelectric Paint Sensor According to Poling Time

분극 시간에 따른 압전 페인트 센서의 압전 특성 연구

  • Han, Dae-Hyun (Dept. of Mechatronics Engineering, and LANL-CBNU Engineering Institute Korea, Chonbuk Nat'l Univ.) ;
  • Park, Seung-Bok (Dept. of Mechatronics Engineering, and LANL-CBNU Engineering Institute Korea, Chonbuk Nat'l Univ.) ;
  • Kang, Lae-Hyong (Dept. of Mechatronics Engineering, and LANL-CBNU Engineering Institute Korea, Chonbuk Nat'l Univ.)
  • 한대현 (전북대학교 메카트로닉스공학과, 로스알라모스연구소-전북대학교 한국공학연구소) ;
  • 박승복 (전북대학교 메카트로닉스공학과, 로스알라모스연구소-전북대학교 한국공학연구소) ;
  • 강래형 (전북대학교 메카트로닉스공학과, 로스알라모스연구소-전북대학교 한국공학연구소)
  • Received : 2014.04.11
  • Accepted : 2014.07.16
  • Published : 2014.10.01
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Abstract

In this study, the piezoelectric characteristics of a piezoelectric paint sensor were investigated in relation to the poling time. This piezoelectric paint sensor was composed of PNN-PZT powder and epoxy resin with a 1:1 weight ratio. The dimensions of the paint specimen were $40{\times}10{\times}1mm^3$, and the top and bottom sides were both coated with a silver paste to create electrodes. During the poling treatment, the poling time was controlled to examine the effect of the piezoelectric properties, while the poling temperature was fixed at room temperature and the electric field was set to 4 kV/mm. The piezoelectric properties were measured by comparing the output voltage from the paint sensor to the force signal from an impact hammer when the impact hammer hit the specimen. In conclusion, the optimal poling conditions were found to be an electric field of 4 kV/mm and a poling time of around 30 min at room temperature.

본 논문에서는 분극 시간에 따라 압전 페인트 센서의 특성이 어떻게 변하는지 평가하고, 그 결과를 기술하였다. 연구에 사용된 압전 페인트 센서는 유연 압전 재료인 $Pb(Ni_{1/3}Nb_{2/3})O_3-Pb(Zr,Ti)O_2$ (PNN-PZT)와 에폭시 수지를 무게비 1:1로 혼합하여 제작하였다. 센서 시편은 몰드를 사용하여 $40{\times}10{\times}1mm^3$ 크기로 제작하였고, 윗면과 아랫면에 실버 페이스트를 사용하여 전극을 제작하였다. 분극 작업 시 온도는 상온으로, 분극 전계는 4kV/mm 고정한 상태에서 분극 시간을 달리함으로써 분극 조건을 달리하였다. 분극 특성은 충격 망치를 이용하여 충격을 시편에 가했을 때 충격 망치에서 측정되는 힘과 압전 페인트 센서에서 출력되는 전압을 비교하여 살펴보았다. 그 결과, 상온에서 분극 전계가 4kV/mm인 경우, 30분 정도 분극 처리를 한 경우 가장 최적의 분극 조건임을 확인하였다.

Keywords

References

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