Grain-Oriented Ferroelectric Ceramics with Single-Crystal-like Piezoelectric Properties and Low Texture Temperature

• DOI: 10.1021/acsami.0c11680
• Publication Date: 2020-08-04T10:42:46Z
• Authors: Yunfei Chang; Jie Wu; Zhen Liu; Enwei Sun; Linjing Liu; Qiangwei Kou; Fei Li; Bin Yang; Wenwu Cao
• Keywords: Texture (cosmology); Figure of Merit

High-performance piezoelectrics are pivotal to various electronic applications including multilayer actuators, sensors, and energy harvesters. Despite the presence of high Lotgering factor F001, two key limitations today's relaxor-PbTiO3 textured ceramics low piezoelectric properties relative single crystals texture temperature. In this work, Pb(Yb1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PYN-PMN-PT) with F001 ∼ 99% were synthesized at only 975 °C through liquid-phase-assisted templated grain growth, where particular significance is that single-crystal properties, i.e., very large electrostrain Smax/Emax 1830 pm V-1, giant figure merit d33 × g33 61.3 10-12 m2 N-1, electromechanical coupling k33 0.90, Curie temperature Tc 205 °C, simultaneously achieved. Especially, values correspond ∼180% enhancement as compared regularly 1200 °C-textured 96%, representing highest ever reported on piezoceramics. Phase-field simulation revealed misorientation has a stronger influence piezoelectricity than fraction. The ultrahigh response achieved here mainly attributed effective control orientation features domain miniaturization. This work provides important guidelines for developing novel significantly enhanced functional synthesis in future can also greatly expand application fields piezoceramics high-performance, miniaturized devices structures.