Development of temperature stable charge based piezoelectric composite quasi-static pressure sensors

作者：van den Ende D A; Groen W A; van der Zwaag S

来源：Sensors and Actuators A: Physical , 2010, 163(1): 25-31.

DOI：10.1016/j.sna.2010.06.010

• Piezoelectric composites
• Pressure sensor
• Switch
• Charge output
• Temperature dependence

In this work piezoelectric composite charge based sensors are developed, aimed at quasi-static pressure sensor or switch type applications. The use of piezoelectric composite materials allows for manufacturing robust devices which can easily be integrated with conventional polymer processing. Piezoelectric composites of lead zirconate titanate (PZT) and two types of polymers, polyamide-6 (PA6) and a liquid crystalline thermosetting polymer (LCT) were used to manufacture sensor devices. The behavior of the output signal of different types of sensors was studied with focus on both temperature dependence of the output signal and the drift of the signal with time. The properties of the PA6 based composites and devices are highly temperature dependent while the output signal of LCT based composites and devices has a very low temperature dependence and drift, even outperforming the PZT reference device. The temperature dependence of the output signal of the composite devices is dependent on the device configuration as well as the material properties, such as polymer permittivity. The drift of the signal is strongly dependent on the resistivity of the PZT-polymer composite material used in the sensor.

• 出版日期2010-9