Effect of Polarization Methods on the Optical and Electrical Properties of Relaxed Ferroelectric Single Crystals
This study aims to improve the optical transmittance of traditional relaxor ferroelectric materials.25PIN-44PMN-31PT three-phase perovskite relaxation ferroelectric single crystal was chosen and subjected to both DC and AC polarization along the[001]direction at room temperature.The optical transmittance and dielectric electromechanical properties of the samples polarized by two methods were compared and analyzed.The results are as follows.After AC polarization,the optical transmittance of the sample reaches 70％in the visible light range.At room temperature its relative dielectric constant increases by 18％,and its piezoelectric coefficient and inverse piezoelectric coefficient rise by 9.7％and 11％,respectively.AC polarization effectively eliminates the scattering-inducing 71° domain walls,thereby improving the optical transmittance.Furthermore,AC-polarized samples exhibit easier polarization rotation of domains,obtaining higher dielectric electromechanical performance.
relaxed ferroelectric single crystalsAC polarizationlight transmittancedielectric piezoelectricity
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