Sensitivity Measurement of the Piezoelectric Paint Sensor according to the Poling Electric Field

ABSTRACT: In this study, the experimental study has been performed by varying the polarization of the electric fieldand impact force to check the piezoelectric characteristics of piezoelectric paint sensor. Piezoelectric paint sensor usedin this study is composed of epoxy resin with a hardener and PNN-PZT powder in 1:1 weight ratio. The dimensionsof the paint sensor specimen are 40 × 40 × 1 mm 3 and regular specimens were made using a mold. The voids areremoved from the specimen in the vacuum desiccator. Both upper side and bottom side of the paint sensor werecoated with silver paste for making an electrode and then dried at room temperature for a day. The poling treatmenthas been carried out under controlled conditions of the electric field in order to check the effect of piezoelectricsensitivities, while the poling temperature was fixed at room temperature and the poling time was set to 30 min. Thepiezoelectric sensitivities have been measured by comparing output voltage from paint sensor with output force fromimpact hammer when the impact hammer hits the paint sensor. In result, the effect of the electric field has beenevaluated for the sensitivity and describe the result.초록