Role of sintering conditions in tuning the defect chemistry and influencing the electromechanical properties of a Pb-based piezoceramic

Kumar, A and Saha, S and Prakash, H and Mahale, B and Singh, RP and Adukkadan, A and Ranjan, R and Kumar, N (2023) Role of sintering conditions in tuning the defect chemistry and influencing the electromechanical properties of a Pb-based piezoceramic. In: Journal of Materials Science: Materials in Electronics, 34 (8).

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Abstract

Ferroelectric ceramic with superior electromechanical properties i.e., piezoelectric coefficient and electro strain along with high operating temperature stability has been the objective with serious hurdles. Here in we have investigated the role of high temperature processing environment in influencing the electromechanical response of a high-performance piezoelectric system Pb (Mg1/3Nb2/3)0.25Zr0.75−xTixO3 (PMNPZT). We have carried out a comprehensive impedance and dielectric spectroscopy to understand the nature of defects induced by processing condition and found that the environment which generates more defects (less activation energy, 0.81 eV) improves considerably both the weak signal and large signal electromechanical response of the system. We obtained d33 of ~ 500 pC/N, electrostrain of ~ 0.4% at 40 kV/cm (d*33 ~ 1000 pm/V). Together with a Curie point of 300 °C, our processing strategy provides this material a combination of desirable features which is appealing both for sensor and high field actuator applications.

Item Type:	Journal Article
Publication:	Journal of Materials Science: Materials in Electronics
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer.
Keywords:	Activation energy; Defects; Piezoelectric ceramics; Piezoelectricity, D 33; Defect chemistry; Electromechanical property; Electromechanical response; High operating temperature; High-temperature processing; Piezo-ceramics; Piezoelectric coefficient; Sintering condition; Temperature stability, Sintering
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	05 Apr 2023 07:07
Last Modified:	05 Apr 2023 07:07
URI:	https://eprints.iisc.ac.in/id/eprint/81161

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