Abstract:

A pressure sensor of  nano\|carbon black/silicon rubber conductive composite was fabricated on the ceramic substrate with interdigital electrodes. Piezoresistive characteristics of the sensor were investigated under alternating current drive. The results demonstrate the sensor exhibited positive piez
oresistive effect at a frequency of 1 kHz. The polarization intensity of space charges on the interface between nanocarbon black and silicone rubber decreased and the positive piezoresistive effect weakened as the working frequency increased. The response time and recovery time of sensor were within 3 s in the processes of loading and unloading. The resolution of the sensor was 0.5 N in the continuous loading process. 