Overcoming the performance ceiling of textured piezoelectric ceramics

Le résumé fourni par la source

Textured piezoelectric ceramics could deliver the ultrahigh piezoelectricity of single crystals while retaining the mechanical robustness and cost-effectiveness of conventional ceramics, but after decades of effort, their piezoelectricity has not approached that of single crystals. We exploited compositional flexibility of textured ceramics, a critical advantage over single-crystal counterparts, using a machine-learning approach. Our samarium (Sm)–doped Pb(In 1/2 Nb 1/2 )O 3 -Pb(Sc 1/2 Nb 1/2 )O 3 -PbTiO 3 textured ceramics exhibited an ultrahigh piezoelectric coefficient ( d 33 ) of 1720 picocoulombs per newton and a Curie temperature of 250°C. These values are comparable to, or even surpass, those of state-of-the-art single crystals. In situ x-ray diffraction and Rayleigh analysis indicate that their exceptional piezoelectricity is predominantly intrinsic rather than driven by domain switching. Leveraging these textured ceramics, we fabricated a piezoelectric accelerator that exhibits not only higher sensitivity but also substantially better reliability than its single-crystal counterparts.

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