A new poling protocol for enhanced piezoelectricity in Bi0.5Na0.5TiO3
Mukesh Kumari, Ratnamala Chatterjee
TL;DR
This paper introduces a novel corona poling protocol at low temperature that significantly enhances the piezoelectric properties of Bi0.5Na0.5TiO3 by quenching from the paraelectric to ferroelectric phase.
Contribution
The study presents a new poling method involving low-temperature corona discharge and phase quenching to improve piezoelectricity in BNT.
Findings
38% increase in piezoelectric coefficient (d33)
20% increase in maximum unipolar strain
Effective enhancement of piezoelectric properties
Abstract
In this work, a way to improve the piezoelectric properties of Bi0.5Na0.5TiO3 (BNT) is demonstrated by introducing a new poling protocol. A customized corona poling unit with a low temperature (77 K) sample stage is suggested. Using this protocol, the BNT sample is quenched from its paraelectric phase (T = 350{\deg}C) directly to its ferroelectric phase under corona discharge. Sample poled under this protocol showed an immense improvement (~38% increase) in the piezoelectric coefficient (d33) and 20% increase in the maximum unipolar piezoelectric strain (Smax).
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Taxonomy
TopicsFerroelectric and Piezoelectric Materials · Acoustic Wave Resonator Technologies · Smart Materials for Construction