Novel liquid�phase flash sintering of lead zirconate titanate piezo-ceramics

Arya, KS and Singh, RP and Chakrabarti, T (2024) Novel liquid�phase flash sintering of lead zirconate titanate piezo-ceramics. In: Journal of the American Ceramic Society .

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Abstract

Lead-based piezo-ceramics like lead zirconate titanate (PZT) are a mainstay for many piezoelectric applications. However, lead oxide (PbO) evaporation during sintering poses a significant environmental challenge. Flash sintering (FS) is a novel technique that can densify ceramics in seconds and at a much lower furnace temperature. The liquid-phase FS (LPFS) of PZT (Pb (Zr0.5Ti0.5) O3, with 3 wt. Cu2O and PbO in the molar ratio of 1:4) is investigated in this work. Further, a comparison has been made among the lead loss, dielectric, and piezoelectric properties of flash-sintered and conventionally liquid-phase-sintered PZT. It has been observed that the evaporation of PbO has been brought down 3�5 times by FS. The dielectric constant of LPFS PZT is significantly higher, especially at higher frequencies with lower dielectric loss. An enhanced piezoelectric coefficient in flash-sintered PZT has also been observed. The LPFS of PZT shows that the lead loss can be brought down significantly with the added benefit of enhanced dielectric and piezoelectric properties. XRD and Rietveld analysis show an increase in tetragonality after FS in comparison with conventional sintering. XPS and ESR studies show a difference in defect concentration after FS in comparison with conventional sintering that is likely responsible for the enhanced dielectric and piezoelectric properties. © 2024 The American Ceramic Society.

Item Type:	Journal Article
Publication:	Journal of the American Ceramic Society
Publisher:	John Wiley and Sons Inc
Additional Information:	The copyright for this article belongs to publishers.
Keywords:	Dielectric losses; Dielectric properties of liquids; Dielectric properties of solids; Layered semiconductors; Lead zirconate titanate; Liquid phase sintering; Piezoelectric ceramics; Piezoelectricity; Spark plasma sintering, Dielectric and piezoelectric properties; Flash sintering; Lead loss; Lead zirconate titanate; Lead zirconate-titanate; Liquid Phase; Liquid phasis; Liquid-phase flash sintering; PZT, Rietveld analysis
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	15 Sep 2024 09:00
Last Modified:	15 Sep 2024 09:00
URI:	http://eprints.iisc.ac.in/id/eprint/86090

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