Characterization of High Porous PZT Piezoelectric Ceramics by different Techniques

Praveen Kumar B; Bhupender Rawal; KM Rajan

doi:10.14429/dsj.68.12315

Praveen Kumar B Young Scientist centre (ACE Cluster) Armament Research & Development Establishment, DRDO, Pashan, Pune
Bhupender Rawal Young Scientist centre (ACE Cluster) Armament Research & Development Establishment, DRDO, Pashan, Pune
KM Rajan Director Armament Research & Development Establishment, DRDO, Pashan, Pune

DOI: https://doi.org/10.14429/dsj.68.12315

Keywords: BURPS, Freeze casting, Foam reticulation, Porous, Piezoceramics

Abstract

Ultimate properties of a porous ceramic is highly process dependent. In this study, prevalent porous ceramics fabrication methods (Freeze casting, Foam reticulation and Burnable Plastic Sphere (BURPS) method) have been compared by fabricating the porous lead zirconate titanate (PZT) based piezoelectric ceramics. Field Emission Scanning electron microscopy (FESEM) studies were carried out to study the pore size and distribution of the ceramics. Hydrostatic co-efficients increased tremendously on incorporation of porosity which led to Hydrostatic Figure of Merit of 7480 in Foam reticulation samples (porosity 86%). The three dimensionally interconnected networks in the freeze casted samples led to lowest acoustic impedance (6 MRayls) despite not having the lowest density.

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