Premium
Lead‐Free Metamaterials with Enormous Apparent Piezoelectric Response
Author(s) -
Zhou Wanfeng,
Chen Pan,
Pan Qi,
Zhang Xiaotong,
Chu Baojin
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201502562
Subject(s) - piezoelectricity , materials science , metamaterial , flexoelectricity , lead (geology) , curvature , ceramic , composite material , nanotechnology , optoelectronics , geometry , mathematics , geomorphology , geology
Lead‐free flexoelectric piezoelectric metamaterials are created by applying an asymmetric chemical reduction to Na 1/2 Bi 1/2 TiO 3 ‐BaTiO 3 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.