Enhancement in the piezoelectric properties in lead-free BZT-xBCT dense ceramics

Syal, R and Kumar, M and Singh, AK and De, A and Thakur, OP and Kumar, S (2020) Enhancement in the piezoelectric properties in lead-free BZT-xBCT dense ceramics. In: Journal of Materials Science: Materials in Electronics, 31 (23). pp. 21651-21660.

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Abstract

In this paper, we have prepared the lead-free piezoelectric BZT-xBCT (x = 0.48, 0.49, 0.50 and 0.51) polycrystalline compositions using solid-state reaction technique. Structural, microstructural and electrical properties were explored by changing the BCT concentration. Structural analysis shows the existence of morphotropic phase boundary in BZT-xBCT (x = 0.50) sample. The SEM micrographs illustrate the decrease in grain size with increase in the BCT concentration. The temperature-dependent dielectric behavior depicts high dielectric constant ~ 26,100 and low loss ~ 0.04 for BZT-0.48BCT composition at Curie temperature. The PE hysteresis loop shows the well-saturated hysteresis loops and low value of coercive field (EC). The higher values of electromechanical planar coupling coefficient, KP ~ 51.2, piezoelectric coefficient, d33 ~ 512 pC/N and bipolar strain (~ 0.16) were recorded for BZT-0.50BCT ceramic composition. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.

Item Type:	Journal Article
Publication:	Journal of Materials Science: Materials in Electronics
Publisher:	Springer
Additional Information:	The copyright of this article belongs to Springer
Keywords:	Hysteresis; Hysteresis loops; Solid state reactions, High dielectric constants; Lead-free piezoelectrics; Morphotropic phase boundaries; Piezoelectric coefficient; Piezoelectric property; Saturated hysteresis loops; Solid-state reaction techniques; Temperature dependent, Piezoelectricity
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	08 Jan 2021 09:38
Last Modified:	08 Jan 2021 09:38
URI:	http://eprints.iisc.ac.in/id/eprint/67491

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