Lead-Free Metamaterials with Enormous Apparent Piezoelectric Response
Wanfeng Zhou1, Pan Chen1, Qi Pan1
1CAS Key Laboratory of Materials for Energy Conversion and Department of Materials Science and Engineering, University of Science and Technology of China, No. 96 Jinzhai Rd, Hefei, Anhui Province, 230026, China.
Advanced Materials (Deerfield Beach, Fla.)
|September 25, 2015
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.
