Studies on Pressure and Temperature Dependent Dielectric Properties of Lead Magnesium Niobate -Lead Titanate Binary Relaxor to Use as a Pressure Sensing Material

Measurement of pressure with required accuracy is important in many industries such as process, chemical manufacturing, automobile etc. The accurate pressure measurement is important not only due to quality considerations but also for safety purposes. A large number of instruments and sensors are available to measure gauge, differential, and absolute pressures. The primary standards measure the pressure using the fundamental units. The Secondary or transfer pressure standards measure pressure in terms of some other quantity like resistance, capacitances etc. Since the discovery of ferroelectricity in single crystal materials (Rochelle salts) in 1921 and its subsequent extension towards the poly-crystalline material (barium titanate, BT) during the 1940s, there has been a continued discovery of new material and technological development leading to the use of ferroelectric relaxor in a significant number of applications like multilayer capacitor, actuators, energy storage etc. The present study describes the investigation of pressure and temperature dependent dielectric properties of Lead Magnesium Niobate-Lead Titanatebinary (PMN-PT) Binary relaxor specimens. In this study, the investigator optimized the specimen's preparation method by changing PT concentration to improve the specimen's pressure sensing properties. This study adds another pressure sensing application of relaxor materials amongst many other applications.