Dielectric, impedance and piezoelectric properties of (Na0.5La0.5)TiO3-doped 0.67BiFeO3–0.33BaTiO3 ceramics

Nianshun Zhao, Yungui Shi, Feng Huang, Zheng Li, Cheng Li, Li Wang, Jianhua Cao, Huiqing Fan

科研成果: 期刊稿件文章同行评审

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摘要

The crystallographic structure, dielectric, impedance and piezoelectric properties of novel (0.67 − x)BiFeO3–0.33BaTiO3–x(Na0.5La0.5)TiO3 (NLT100x, x = 0.0, 0.02, 0.04, 0.06, 0.08) ceramics were systematically investigated experimentally. The crystallographic studies showed that different concentrations (Na0.5La0.5)TiO3 doping were well soluble with the BiFeO3 system to form a single pseudo-cubic phase solid solution. The dielectric analysis shows that the doping reduces the leakage current, suppresses the Bi volatilization, expands the dielectric peak, and leads to the evolution of relaxor behavior. Moreover, the large strain (S) of 0.255% and the normalized strain of 430 pm/V were obtained at x = 0.04 and 60 kV/cm, which is attributed to the coexistence of ferroelectric and relaxor domains favoring the domain steering. More importantly, raising the temperature can further improve the strain performance, reaching the maximum strain (Smax) value (~ 0.346%) with the maximum normalized strain of (~ 714 pm/V) at 120 °C and 50 kV/cm. The results show the potential value of the ceramics in piezoelectric actuator applications.

源语言英语
文章编号857
期刊Journal of Materials Science: Materials in Electronics
34
10
DOI
出版状态已出版 - 4月 2023

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