Enhanced performance by inducing defect dipoles in lead based relaxor ferroelectric PHT-based ceramics
Source abstract
Abstract
Abstract Mn-doped 0.49 Pb(Ni1/3Nb2/3)O3-0.51 Pb(Hf0.3Ti0.7)O3 (abbreviated PNN-PHT) ceramics were prepared by solid-phase reaction method. The influence of defect dipoles on various properties was systematically studied. Results showed that Mn doping significantly improved mechanical quality factor Qm of PNN-PHT ceramics and greatly reduced dielectric loss, while Curie temperature Tc was also slightly increased. After 105 electric field cycles, Mn doped PNN-PHT ceramic showed excellent fatigue property. Based on ferroelectric and dielectric properties of samples, the reason for defect dipole and internal mechanism of its influence on piezoelectric properties were elucidated. Finally, novel ceramic 0.75 mol% Mn-doped PNN-PHT with excellent performance was obtained (d33~750 pC/N, kp~0.55, Qm~384 and tanδ~0.59%). Therefore, results of this work suggest that these ceramics may be potential candidates for piezoelectric actuators and high-power devices.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Dielectric materials and actuators · Acoustic Wave Resonator Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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