Improved electrical properties in Nb/Fe co-modified CaBi4Ti4O15 high-temperature piezoceramics

Liu, Yang; Huang, Peiming; Zhang, Yuhao; Du, Juan; Bai, Wangfeng; Li, Lili; Wen, Fei; Zheng, Peng; Wu, Wei; Zheng, Liang; Zhang, Yang

doi:10.1088/2053-1591/ab5ec7

Cited by 4 publications

(1 citation statement)

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“…In addition, the (013)CBN film exhibits excellent strain property. Because almost no strain has been reported in Aurivillius-type piezoelectric films, we compares the strain performance of the (013)CBN film with typical Aurivillius-type piezoelectric ceramics as shown in Figure . − It can be found that the strain of the (013)CBN film is much higher than that of other Aurivillius-type piezoelectric ceramics. And its strain is comparable to those of BNT, PMNPT, and KNN based films reported in the literature. − Therefore, it provides a piezoelectric film with great potential for the development of high-temperature (>500 °C) piezoelectric MEMS devices.…”

Section: Resultsmentioning

confidence: 99%

Significantly Enhanced Electrostrain in Oriented Epitaxial Self-Assembled Aurivillius-Type Piezoelectric Films via Regulating Polarization Vectors

Hao

Ju³

et al. 2023

ACS Appl. Mater. Interfaces

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High-temperature piezoelectric films with excellent piezoelectric and ferroelectric properties lay the foundation for the development of high-temperature piezo-MEMS devices. However, due to the poor piezoelectricity and strong anisotropy, it remains a challenge to obtain high quality Aurivillius-type high-temperature piezoelectric films with high performance, which impedes their practical implements. Here, a feasible polarization vector regulation strategy associated with oriented epitaxial self-assembled nanostructures for enhancing electrostrain is proposed. Guided by lattice matching relation, non-c-axis oriented epitaxial self-assembled Aurivillius-type calcium bismuth niobate (CaBi2Nb2O9, CBN) high-temperature piezoelectric films were successfully prepared on different oriented Nb-STO substrates. By the lattice matching relationship, hysteresis measurement, and piezoresponse force microscopy analysis, it is confirmed that the polarization vectors transform from a two-dimensional plane to a three-dimensional space, and the out-of-plane polarization switching is enhanced. A platform for more possible polarization vectors is provided in the self-assembled (013)CBN film. More importantly, enhanced ferroelectric (P r ∼ 13.4 μC/cm2) and large strain (∼0.24%) were obtained in the (013)CBN film, which promotes the great application prospect of CBN piezoelectric films in high-temperature MEMS devices.

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