Large electric‐field‐induced strain and enhanced piezoelectric constant in CuO‐modified BiFeO<sub>3</sub>‐BaTiO<sub>3</sub> ceramics

Journal of the American Ceramic Society - Tập 101 Số 8 - Trang 3383-3392 - 2018
Weiwei Gao1, Jing Lv1, Xiaojie Lou1
1Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, China

Tóm tắt

AbstractIn 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 (TC) 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.

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Thông tin xuất bản

Journal of the American Ceramic Society

Tập 101 Số 8

3383-3392

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