Indian Journal of Science and Technology

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Polypyrrole, an Intrinsically Conductive Polymer (ICP) was obtained through chemical oxidative polymerization of pyrrole and a low temperature sensing device was designed by pelletizing Ppy/Piezoceramic powder composite with Tin. Raw/Green pellets of Ppy/PZT composite were liquid phase sintered above the solidus temperature of Tin metal (2540C) to yield the final sensor. Current-Voltage (I-V) characteristics of two such sensor samples were analyzed. Sensor sample with 4 % Tin yielded maximum conductivity of 9.12 S/cm as compared with the sensor sample with 3 % Tin, conductivity dropped to 5 S/cm. Also, almost non- linear trend in the I-V curves was observed due to the environmental factors such as a small temperature range between 00C-1100C. Characterization of both the sensor samples using SEM confirmed that the sensor with higher Tin content behaved as a better sensor than the sensor having a lower Tin content.

Keywords

Conducting Polymers, Polypyrrole, PZT, Ppy/PZT Temperature Sensor, Sensor Design
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