Synthesis and characterization of Na0.5Bi0.44Ba0.06TiO3 and Na0.5Bi0.44Ca0.06TiO3 ceramics system

Kayal, Soubhik and Asthana, Saket (2016) Synthesis and characterization of Na0.5Bi0.44Ba0.06TiO3 and Na0.5Bi0.44Ca0.06TiO3 ceramics system. Masters thesis, Indian Institute of Technology Hyderabad.

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Abstract

Piezoelectric material finds its application in multiple devices such as sensors, actuators, printer etc. However most of the piezoelectric materials utilize lead based system which is having serious environmental issue. Currently there is no problem important than to find the replacement for the lead-based piezoelectric for the actuators. We need to develop electromechanical properties for the actuator application with high piezoelectric constant, high coupling constant, low loss, high transition temperature. So to solve the issue we have to focus on few things- i) search a new system that shows Morphotropic (M) or Poly-morphotropic (P) phase boundary, because at that boundary there is a thermodynamical phase transition due to that there should be a sharp peak for the piezoelectric constant also for stress that can give rise of high piezoelectric constant, dielectric constant ii) Stabilization of the metastable phase iii) Improve the intrinsic properties of the known composition through microstructure optimization, domain and cation engineering, multi layering. All those approaches are challenging to synthesize a material which has satisfied above those properties. As we going to execute those special properties in our known piezoelectric system which is having high depolarizing temperature shows huge impression in the piezoelectric based research.

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