Lead-Free Metamaterials with Enormous Apparent Piezoelectric Response.
basic_science · Level V
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- Record sourced from PubMed, PMID 26401646.
- Also identified by DOI 10.1002/adma.201502562.
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Abstract
Lead-free flexoelectric piezoelectric metamaterials are created by applying an asymmetric chemical reduction to Na1/2 Bi1/2 TiO3 -BaTiO3 ceramics. The reduction induces two gradient-generating mechanisms, curvature structure and chemical inhomogeneity, and enhances the flexoelectric effect. The ceramics behave like piezoelectric materials, exhibiting an enormous and high-temperature stable apparent piezoelectric response, outperforming existing lead-oxide-based piezoelectrics.