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Simultaneous increase in piezoelectric response and Curie point in BaTiO3 based Pb-free piezoceramic

Tina, GA and Punetha, P and Adhikary, GD and Ranjan, R (2024) Simultaneous increase in piezoelectric response and Curie point in BaTiO3 based Pb-free piezoceramic. In: Scripta Materialia, 243 .

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Official URL: https://doi.org/10.1016/j.scriptamat.2024.115994


Piezoelectric ceramics are used in wide-ranging applications as actuators, transducers, and sensors. For applications at ambient environmental conditions, it is desirable that the piezoelectric material exhibit large piezoelectric coefficient (d33) and possess Curie point well above room temperature. Among the lead-free piezoelectrics, the classical ferroelectric BaTiO3 exhibits Curie point and d33 � 120 °C and 190 pC/N, respectively. Most attempts at improving the d33 of BaTiO3 via chemical modifications significantly reduces the Curie point (Tc). Here we show that it is possible to improve both the d33 and Tc of BaTiO3. We found this possibility while investigating a solid solution of BaTiO3 with BaAlO2.5. An optimum composition, 0.97 BaTiO3-0.03BaAlO2.5 of this solid solution exhibit d33 �356 pC/N, Curie point 125 °C, and good thermal stability of the piezo response. © 2024 Acta Materialia Inc.

Item Type: Journal Article
Publication: Scripta Materialia
Publisher: Acta Materialia Inc
Additional Information: The copyright for this article belongs to Acta Materialia Inc.
Keywords: Aluminum compounds; Barium titanate; Chemical modification; Curie temperature; Ferroelectric materials; Ferroelectricity; Piezoelectric actuators; Piezoelectric ceramics; Piezoelectricity; Solid solutions; Thermal conductivity, Ambients; Curie points; D 33; Environmental conditions; Lead-free piezoelectrics; Pb-free; Piezo-ceramics; Piezoelectric coefficient; Piezoelectric response; Wide-ranging applications, Perovskite
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 01 Mar 2024 06:13
Last Modified: 01 Mar 2024 06:13
URI: https://eprints.iisc.ac.in/id/eprint/83877

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