论文标题
奈贝特铅镁铅钛盐（PMN-0.3PT）的结构和机电表征用于能量收集应用
Structural and electromechanical characterization of lead magnesium niobate-lead titanate (PMN-0.3PT) piezoceramic for energy harvesting applications
论文作者
论文摘要
使用压电效应原理进行有效的机械能量收集需要特定的材料特制要求。这包括大型压电电荷系数（DIJ），大弹性应变（εy），小弹性合规性（SIJ）和小介电介电常数（\ k {appa} ij）。目前的工作对无碎石铅氮镁二镁镁铅钛钛二钛（1-X）[pb（mg（1/3）nb（1/3）nb（2/3）O3） - xpbtio3在x = 0.3或pMN-0.3pt pristiation castival interive instrestist上进行机制。使用固态反应方法合成了无pyrochlore PMN-0.3PT陶瓷，具有共存的单斜晶（PM和CM）相。压电电荷系数（D33），介电介电常数（\ k {appa} 33^t），弹性合规性（s33^e）和机电耦合因子（k33），估计为200个，200 pc/n（of 200 pc/n（大约（大约）分别在具有指定尺寸的螺母样品上使用室温阻抗测量（EN 50324-1：2002和CEI/IEC 60483：1976）。与报道的单晶相比，由于各种带电缺陷的运输而导致的极化泄漏是导致机电特性降低的。 PMN-0.3PT的弹性应变（εy）相对于弹性（FFOM）估计为4.5 x 10-4。动态机械载荷下的能量收集显示最大的短路电流密度为95 Na/cm2，开路电场为98 V/cm。 PMN-0.3PT陶瓷具有令人印象深刻的性能，构成了压电能量收集的重要材料。
Efficient mechanical energy harvesting using the principle of piezoelectric effect demands specific material-property requirements. This includes a combination of large piezoelectric charge coefficient (dij), large elastic strain (εy), small elastic compliance (Sij), and small dielectric permittivity (\k{appa}ij). The present work undertakes structural, electrical, mechanical, and electromechanical characterization of pyrochlore-free lead magnesium niobate-lead titanate (1-x)[Pb(Mg(1/3)Nb(2/3)O3)]-xPbTiO3 at x = 0.3 or PMN-0.3PT, to estimate the above critical parameters for mechanical energy harvesting. Pyrochlore-free PMN-0.3PT ceramic with co-existing monoclinic (Pm and Cm) phases was synthesized using solid-state reaction method. Piezoelectric charge coefficient (d33), dielectric permittivity (\k{appa}33^T), elastic compliance (s33^E), and electromechanical coupling factor (k33), were estimated to be, 200 pC/N (approx), 1.06 (approx) x 10^-8 F/m, 13.16 (approx) x 10^-12 m2/N, and 0.54 (approx), respectively, using room temperature impedance measurement on a poled sample with specified dimensions (EN 50324-1:2002 and CEI/IEC 60483:1976). Polarization leakage due to transport of various charged defects was identified to be responsible for the reduced electromechanical properties compared to those reported for single crystals. Elastic strain (εy) vis-à-vis flexibility (fFOM) of the PMN-0.3PT was estimated to be 4.5 x 10-4. Energy harvesting under dynamic mechanical loading shows a maximum short-circuit current density, 95 nA/cm2, and an open-circuit electric field, 98 V/cm. With its impressive performance, PMN-0.3PT ceramic constitutes an important material for piezoelectric energy harvesting.
