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.
关键词
弛豫铁电单晶/交流极化/透光率/介电压电
Key words
relaxed ferroelectric single crystals/AC polarization/light transmittance/dielectric piezoelectricity
维普
万方数据