Good piezoelectric properties and low mechanical losses are prerequisites for the application of high-power devices. In this study, an appropriate amount of Mn ions was introduced into a piezoelectric 0.46Pb(Ni1/3Nb2/3)O-0.23Pb(In1/2Nb1/2)O-0.31PbTiO ceramic to enhance its electromechanical properties. The results revealed that the mechanical quality factor() value of the ceramic was improved while maintaining high piezoelectric properties, and the dielectric loss was reduced. When Mn doping is 1.0 mol%, the component decreased by only ∼21%, while increased by ∼13 times ( = 750 pC/N, = 385, tan = 0.66%). The measurement of the internal bias field () in the loops of aged and nonaged samples showed that aging promoted the directional alignment of defect dipoles and improved their . According to the PFM data, significant increase in was mainly due to the "bulk effect" caused by low domain wall density. In turn, widening and lengthening of domains promoted the accumulation of most defective dipoles in the ceramic body, which greatly amplified the hardening effect. This work provides a good example of enhancing in ceramic systems with high values through the construction of low domain wall densities.

中文翻译：

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使用缺陷工程修改 PNN-PIN-PT 压电陶瓷中的域结构以实现高机电性能

良好的压电性能和低机械损耗是高功率器件应用的先决条件。本研究将适量的Mn离子引入压电0.46Pb(Ni1/3Nb2/3)O-0.23Pb(In1/2Nb1/2)O-0.31PbTiO陶瓷中以增强其机电性能。结果表明，在保持高压电性能的同时，陶瓷的机械品质因数得到提高，介电损耗降低。当Mn掺杂量为1.0 mol%时，组分仅减少~21%，而增加~13倍（= 750 pC/N，= 385，tan = 0.66%）。对老化和未老化样品环路中内部偏置场 () 的测量表明，老化促进了缺陷偶极子的定向排列并改善了它们。根据PFM数据，显着增加主要是由于低磁畴壁密度引起的“体效应”。反过来，磁域的加宽和拉长促进了陶瓷体中大多数缺陷偶极子的积累，从而大大放大了硬化效应。这项工作提供了一个很好的例子，通过构建低畴壁密度来增强陶瓷系统的高值。