Sensing Materials: Ceramics

Electronic ceramic materials attract attention due to their unique piezoelectrical, mechanical, chemical properties along with high thermal, chemical stability, low cost and wide range of sensor operations. These physical and chemical sensors commercially used in domestic, industrial, health sectors. These ceramic sensors behave as a transducer which converts the physical or chemical response into an electrical signal. In this article, the ceramic sensors have been discussed in detail which includes humidity sensor (resistive and capacitive sensor), temperature sensor (NTC thermistor), piezoelectric sensor (pressure sensor, nanogenerators for health sector). The working principle of these sensor depends on thermoelectric, chemical adsorption to electric, piezoelectric behavior which produce electrical signal via changing physical and electrical properties. To further enhance the sensor domain toward flexible sensors applications for biosensor designing, polymer derived ceramic, and lead-free ceramics have been used.