Jinyu Chen, Chao Chen, Chong Zhao, na tu, Yunjing Chen, Nie Xin, Xiaokun Huang, Junming Liu, Xiangping Jiang
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引用次数: 0
Abstract
To clarify the structural mechanism of high piezoelectric activity of (1-x)BiFeO3-xBaTiO3 ((1-x)BF-xBT) solid solution, the evolution of phase structure and domain configuration and their effects on piezoelectric properties were studied in a wide range of components (0.2 ≤ x ≤ 0.9). XRD refinement results show that with the introduction of BT, the phase structure gradually transforms from rhombohedral (R) to rhombohedral/pseudocubic (R/pC) coexistence and finally to pC, accompanied by the weakening of lattice distortion. The freezing temperature (Tf) of (1-x)BF-xBT decreases with the increment of BT around the morphotropic phase boundary (MPB) (0.3 ≤ x ≤ 0.5). This indicates that the domain structure changes from ferroelectric ordered domains to nanodomains (or polar nanoregions), corresponding to the enhancement of the relaxation state. High piezoelectric properties in 0.7BF-0.3BT are attributed to the unique heterogeneous domain structure and superior domain switching at MPB. The large strain is achieved in 0.6BF-0.4BT, which results from the mutual transformation between relaxor nanodomains and ferroelectric ordered domains.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.