Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China.
Institute of Advanced Materials, Hubei Normal University, Huangshi, 435002, P. R. China.
Adv Sci (Weinh). 2023 Jun;10(17):e2207059. doi: 10.1002/advs.202207059. Epub 2023 Apr 25.
Kirigami- and oirigami-inspired techniques have emerged as effective strategies for material structure design; however, the use of these techniques is usually limited to soft and deformable materials. Piezoelectric ceramics, which are typical functional ceramics, are widely used in electronic and energy devices; however, the processing options for piezoelectric ceramics are limited by their brittleness and feedstock viscosity. Here, a design strategy is proposed for the preparation of lead-free piezoelectric ceramics inspired by kirigami/origami. This strategy involves direct writing printing and control over the external gravity during the calcination process for the preparation of curved and porous piezoelectric ceramics with specific shapes. The sintered BaTiO ceramics with curved geometries produced using this strategy exhibit a high piezoelectric constant (d = 275 pC N ), which is 45% higher than that of conventionally sintered sheet ceramics. The curved structure of the ceramics is well-suited for use in the human body and it was determined that these curved ceramics can detect pulse signals. This strategy can be applied in the large-scale and low-cost production of other piezoelectric ceramics with various curved shapes and provides a new approach for the preparation of complex-shaped ceramics.
剪纸和折纸启发的技术已成为材料结构设计的有效策略；然而，这些技术的使用通常仅限于柔软和可变形的材料。压电陶瓷是一种典型的功能陶瓷，广泛应用于电子和能源设备；然而，由于其脆性和原料粘度的限制，压电陶瓷的加工选择有限。在这里，提出了一种受剪纸/折纸启发的制备无铅压电陶瓷的设计策略。该策略涉及直接书写打印和在煅烧过程中控制外部重力，以制备具有特定形状的弯曲和多孔压电陶瓷。使用该策略制备的具有弯曲几何形状的 BaTiO3 陶瓷表现出高的压电常数（d = 275 pC N），比传统烧结片状陶瓷高 45%。陶瓷的弯曲结构非常适合在人体中使用，并且确定这些弯曲陶瓷可以检测脉冲信号。该策略可应用于各种弯曲形状的其他压电陶瓷的大规模和低成本生产，并为复杂形状陶瓷的制备提供了一种新方法。
