Three-dimensional printing of piezoelectric materials with designed anisotropy and directional response
Three-dimensional printing of piezoelectric materials with designed anisotropy and directional response
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DOI：
10.1038/s41563-018-0268-1
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发表时间：
2019-03-01
期刊：
影响因子：
41.2
通讯作者：
Zheng, Xiaoyu (Rayne)
中科院分区：
文献类型：
--
作者：
Cui, Huachen;Hensleigh, Ryan;Zheng, Xiaoyu (Rayne)
压电系数受组成材料的固有晶体结构的约束。在这里，我们描述的设计和制造路线，以前无法访问类的压电材料，具有任意的压电系数张量。我们的计划是基于操纵的电位移图从家庭的结构细胞模式。我们通过增材制造具有复杂三维结构的自由形式的钙钛矿基压电纳米复合材料来实现我们的设计。在给定模式下，激活的压电超材料的所得电压响应可以通过施加应力选择性地抑制、逆转或增强。此外，这些机电超材料仅使用其母体材料的一小部分就实现了高比压电常数和可定制的柔性。这一策略可以应用于创建下一代智能基础设施，能够执行各种结构和功能任务，包括同时吸收和监测冲击，三维压力映射和方向性检测。
Piezoelectric coefficients are constrained by the intrinsic crystal structure of the constituent material. Here we describe design and manufacturing routes to previously inaccessible classes of piezoelectric materials that have arbitrary piezoelectric coefficient tensors. Our scheme is based on the manipulation of electric displacement maps from families of structural cell patterns. We implement our designs by additively manufacturing free-form, perovskite-based piezoelectric nanocomposites with complex three-dimensional architectures. The resulting voltage response of the activated piezoelectric metamaterials at a given mode can be selectively suppressed, reversed or enhanced with applied stress. Additionally, these electromechanical metamaterials achieve high specific piezoelectric constants and tailorable flexibility using only a fraction of their parent materials. This strategy may be applied to create the next generation of intelligent infrastructure, able to perform a variety of structural and functional tasks, including simultaneous impact absorption and monitoring, three-dimensional pressure mapping and directionality detection.