Gradient scaling phenomenon in microsize flexoelectric piezoelectric composites
Gradient scaling phenomenon in microsize flexoelectric piezoelectric composites
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DOI：
10.1063/1.2800794
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发表时间：
2007-11
影响因子：
4
通讯作者：
John Y. Fu;Wenyi Zhu;Nan Li;N. Smith;L. Cross
中科院分区：
文献类型：
--
作者：
John Y. Fu;Wenyi Zhu;Nan Li;N. Smith;L. Cross
挠性电型压电复合材料为压电陶瓷的发展提供了另一种途径，由于含铅成分的挠性电响应减弱而不是增强，这种复合材料的优点之一是灵敏度最高的材料将是无铅的。该复合材料是利用具有织构对称性的非压电元件制造的，这种非压电元件破坏了外加均匀场，导致复合材料的有源挠性电元件产生场梯度。由于这些感应场梯度随着复合材料尺寸的减小而增加，因此可以合理地期望这种复合材料的压电性能将随着其尺寸的减小而增强。在这封信中，我们报告了在两种柔性压电复合材料中证实这种梯度结垢现象的实验研究。讨论了复合材料的制备和测试方法。
The flexoelectric-type piezoelectric composites offer an alternative avenue for the development of piezoelectric ceramics, and since the flexoelectric response is diminished rather than enhanced in lead containing compositions, one of the merits of such composites is that those of highest sensitivity will be lead-free. The composites are fabricated by using certain nonpiezoelectric components with a texture symmetry which breaks up applied uniform fields, leading to the field gradients in the active flexoelectric components of the composites. Since these induced field gradients increase as the composite dimensions decrease, it is logical to expect that the piezoelectric performance of such composites would be enhanced with their reduced sizes. In this letter, we report the experimental studies that confirm such a gradient scaling phenomenon in two flexoelectric piezoelectric composites. The fabrication and measurement of the composites are discussed.