Publication date: 10th April 2024
BiFeO3-BaTiO3 (BF-BT) is a promising ferroelectric material for replacing lead-based ferroelectrics, such as Pb(Zr,Ti)O3 (PZT). Similarly to PZT, BF-BT has a morphotropic phase boundary at ~30% fraction of BaTiO3 [1]. At lower BaTiO3 content (10%), large remanent polarization has been reported that can be released through rapid strain application, yielding a very high power density greater than PZT [2]. BF-BT also has attractive piezoelectric properties that are also stable at high temperatures [3] of interest for, e.g., energy harvesting. Many reports show the promise of BF-BT as a ferroelectric, however, there is limited analysis of the processing relationships with crystal structure and microstructure and their impacts on properties. For example, like Pb loss in PZT, Bi loss during processing is expected to significantly impact microstructure in addition to composition, and thus modify properties. In this presentation, our experimental and computational research on processing-structure-property relationships will be discussed for BF-BT.
[1] D. Wang et al., J. Adv. Dielectrics, 8 (2018) 1830004 (DOI: 10.1142/S2010135X18300049)
[2] Z. Zhou et al., Appl. Phys. Lett., 121 (2022) 113903 (DOI: 10.1063/5.0102102)
[3] K. Tong et al., J. Eur. Cer. Soc., 38 (2018) 1356 (DOI: 10.1016/j.jeurceramsoc.2017.10.023)
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