• Hemangi Kabra
• H.A. Deore
• Pranita Patil

Piezoelectric materials are some naturally occurring materials which produces mechanical stresses when subjected to some voltages. But natural piezoelectric materials suffers a lot of disadvantages like low strength, sensitivity toward moisture, limited operating temperature range so, to overcome these drawbacks piezoelectric ceramics are made. Two major piezoelectric ceramics used are barium titanate (BaTiO3) and lead zirconium titanate (PZT).BaTiO3 is ferroelectric ceramic which exhibit photorefractive effect and piezoelectric properties. BaTiO3 has a disadvantage of low Curie temperature which can be further overcome by processing. Lead Zirconate titanate is an inorganic compound with chemical formula Pb[ZrxTi1-x] O3(0< x<1). Also called PZT, it is a ceramic perovskite material that shows a marked piezoelectric effect, meaning that the compound changes shape when an electric field is applied. Nowadays, they become the dominant piezoelectric materials in the fields of piezoelectric applications such as actuators, sensors, and transducers in intelligent systems and smart structures, dominating the world market today. Therefore, the aim of this review is giving a state of art in polycrystalline piezoelectric ceramic materials, like BaTiO3 and PZT and their applications. This review is organized in the following way. In the first part, the history and processing of piezoelectric ceramic materials are briefly introduced, and then the general characteristics of BaTiO3 and PZT are described with an emphasis on the piezoelectric parameters, compositions and properties, and piezoelectric constitutive relationships. Characterization methods for piezoelectric properties and ferroelectric domain structures of piezoelectric ceramic materials are addressed in the third part. Finally, various applications of piezoelectric ceramic materials in ultrasonic actuators, sensors, transducers, and active vibration controlling, are described.

"Review on Advanced Piezoelectric Materials (BaTiO3, PZT)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.950-957, April-2019, Available :http://www.jetir.org/papers/JETIRBB06181.pdf

"Review on Advanced Piezoelectric Materials (BaTiO3, PZT)", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp950-957, April-2019, Available at : http://www.jetir.org/papers/JETIRBB06181.pdf