In this work, we fabricated the (1‐x)BiFeO₃‐xBaTiO₃+y‰ mol CuO ceramics by the modified thermal quenching technique. The pure perovskite phase was formed and a morphotropic phase boundary (MPB) was observed in the ceramics with x = 0.30‐0.33. The addition of CuO can significantly enhance the density of the BiFeO₃‐BaTiO₃ material. Importantly, an enhanced piezoelectric constant (d₃₃=165 pC/N), a large electric‐field‐induced strain (∆S = 0.54%: peak to peak strain) and a large piezoelectric actuator constant (d₃₃*=449 pm/V) together with a high Curie temperature (T_C) of 503°C were observed in the ceramics with x = 0.30 and y = 5. As a result, the enhanced piezoelectricity and large electric‐field‐induced strain could significantly stimulate further researches in BFO‐based ceramics.

中文翻译：

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CuO改性的BiFeO3-BaTiO3陶瓷中的大电场感应应变和增强的压电常数

在这项工作中，我们通过改进的热淬火技术制备了（1 x）BiFeO ₃ - x BaTiO ₃ + y ‰mol CuO陶瓷。形成了纯钙钛矿相，并在x  =  0.30-0.33的陶瓷中观察到了形变相界（MPB）。加入的CuO可以显著增强的BiFeO的密度₃ -BaTiO ₃材料。重要的是，应提高压电常数（d ₃₃ = 165 pC / N），大的电场感应应变（∆S = 0.54％：峰到峰应变）和大的压电致动器常数（d ₃₃* = 449 pm / V）和居里温度（T _C）达到503°C（x  =  0.30和y  =  5），结果是压电增强，电场感应应变大可以极大地促进基于BFO的陶瓷的进一步研究。