Abstract
• Achieving performance optimization in 1–3 piezoelectric composites by the ACP method. • The dielectric constant and piezoelectric coefficient were improved by 19 % and 15 %. • The electromechanical coupling factor was enhanced by 10 %. • A small domain size leads to the performance enhancement of piezoelectric composites. Extensive attention has been paid to alternating current polarization (ACP) as an effective technology to enhance the performance of ferroelectric materials. However, the effect of the ACP method on piezoelectric composites has not been determined. Herein, we studied and compared the effects of direct current polarization (DCP) and ACP on the dielectric, piezoelectric, and electromechanical properties of Pb(Mg 1/3 Nb 2/3 )O 3 –PbTiO 3 (PMN-PT) single-crystal 1–3 piezoelectric composites. For the ACP samples, an increase of 19 % for ε 33 T / ε 0 , 15 % for d 33 , and 10 % for k t is observed in comparison with those of the DCP samples. Investigations of the domain structure indicated that the decreased domain size and high domain-wall density afforded the performance enhancement in ACP samples. Our results expand the application of the ACP method in piezoelectric composites and more diverse piezoelectric material categories.
Published Version
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