<p>High-sensitivity piezoelectric ceramics with high piezoelectric constants (<i>d</i><sub>33</sub>) values are of significant research value, because they facilitate the miniaturization, low-power, and high-efficiency characteristics of transducer devices. However, the development of traditional piezoelectric ceramics relies on the modulation of intrinsic parameters with both limited and blind performance enhancements. In contrast, a performance-driven metamaterials creation model provides new ideas for the development of structure-function-integrated high-performance piezoelectric materials. In this study, the effects of the <i>d</i><sub>33</sub> were systematically investigated in species ranging from two-dimensional straight rod (SR) structures to 3D dot-matrix (Octa) structures, and from simple dot-matrix structures to complex triply periodic minimal surface (TPMS) structures and hybrid structures (Octa&amp;SR). It was found that the metastructure design, characterized by both a high polarization charge conversion rate and a low compression modulus (stiffness), constituted an effective means for enhancing <i>d</i><sub>33</sub>. The SR structure demonstrated the optimal polarization charge conversion rate, the Fks-Shellular (FksS) structure in the TPMS structures exhibited low stiffness values, and the Octa&amp;SR structure exhibited both properties. Notably, all three structures exhibited exceptional piezoelectric properties. Moreover, the FksS structure demonstrated a substantial <i>d</i><sub>33</sub> (194 pC/N) enhancement of 24% compared with that of the conventional solid structure, while exhibiting isotropic and stress-insensitive properties with optimal structure-function integration. Overall, this study elucidates a mechanism for the design of structures exhibiting desirable piezoelectric properties, thereby providing a novel concept for the future development of high-performance and high-failure-strength piezoelectric materials.</p>

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Metastructure strategies for d33 enhancement beyond intrinsic limits in 3D-printed BaTiO3 metamaterials

  • Hongcheng Li,
  • Wenqiang Yang,
  • Li Yao,
  • Yifan Deng,
  • Hui Mei,
  • Laifei Cheng,
  • Litong Zhang

摘要

High-sensitivity piezoelectric ceramics with high piezoelectric constants (d33) values are of significant research value, because they facilitate the miniaturization, low-power, and high-efficiency characteristics of transducer devices. However, the development of traditional piezoelectric ceramics relies on the modulation of intrinsic parameters with both limited and blind performance enhancements. In contrast, a performance-driven metamaterials creation model provides new ideas for the development of structure-function-integrated high-performance piezoelectric materials. In this study, the effects of the d33 were systematically investigated in species ranging from two-dimensional straight rod (SR) structures to 3D dot-matrix (Octa) structures, and from simple dot-matrix structures to complex triply periodic minimal surface (TPMS) structures and hybrid structures (Octa&SR). It was found that the metastructure design, characterized by both a high polarization charge conversion rate and a low compression modulus (stiffness), constituted an effective means for enhancing d33. The SR structure demonstrated the optimal polarization charge conversion rate, the Fks-Shellular (FksS) structure in the TPMS structures exhibited low stiffness values, and the Octa&SR structure exhibited both properties. Notably, all three structures exhibited exceptional piezoelectric properties. Moreover, the FksS structure demonstrated a substantial d33 (194 pC/N) enhancement of 24% compared with that of the conventional solid structure, while exhibiting isotropic and stress-insensitive properties with optimal structure-function integration. Overall, this study elucidates a mechanism for the design of structures exhibiting desirable piezoelectric properties, thereby providing a novel concept for the future development of high-performance and high-failure-strength piezoelectric materials.