作者: Lingling Luo , Na Jiang , Xiao Zou , Dongliang Shi , Ting Sun
关键词: Materials science 、 Condensed matter physics 、 Piezoelectricity 、 Phase transition 、 Curie temperature 、 Crystal structure 、 Multiferroics 、 Orthorhombic crystal system 、 Phase boundary 、 Ferroelectricity
摘要: (0.75–x)BiFeO3−0.25BaTiO3−xLa(Co0.5Mn0.5)O3 + 1 mol% MnO2 lead-free ceramics (x = 0–0.10) were synthesized by a conventional solid-state reaction route and the effects of La(Co0.5Mn0.5)O3 on phase transition, piezoelectric, ferroelectric, multiferroic properties investigated. The can be well sintered at 960 °C for 2 h. After addition La(Co0.5Mn0.5)O3, crystal structure is transformed from rhombohedral (space group R3c) to orthorhombic symmetry Amm2), morphotropic boundary (MPB) phases formed x = 0.01–0.03. dielectric peak was found become diffusive with increasing x. x = 0–0.03 possess strong piezoelectricity d33 95–108 pC N−1, ferroelectricity Pr 2.2–18.1 μC cm−2, considerable magnetoelectric coefficient 372–672 mV/cmOe, high Curie temperature 523–659 °C, showing potential applications in devices.