CAS 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.
CAS Key Laboratory of Materials for Energy Conversion and Department of Materials Science and Engineering and Synergetic Innovation Center of Quantum, Information and Quantum Physics, University of Science and Technology of China, No. 96 Jinzhai Rd, Hefei, Anhui Province, 230026, China.
Adv Mater. 2015 Nov 4;27(41):6349-55. doi: 10.1002/adma.201502562. Epub 2015 Sep 24.
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.
无铅弛豫铁电压电超材料是通过对 Na1/2 Bi1/2 TiO3-BaTiO3 陶瓷进行不对称化学还原制备的。这种还原方法引发了两种梯度产生机制，即曲率结构和化学不均匀性，从而增强了弛豫铁电效应。这种陶瓷的行为类似于压电材料，表现出巨大且高温稳定的明显压电响应，优于现有的含铅氧化物的压电材料。
