Enhanced Electromechanical Response and Thermal Stability of 0.93(Na1/2Bi1/2)TiO3-0.07BaTiO3 Through Aerosol Deposition of Base Metal Electrodes

Khansur NH, Eckstein U, Ursic H, Sadl M, Brehl M, Martin A, Rieß K, de Ligny D, Webber KG (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Advanced Materials Interfaces WILEY-VCH Verlag GmbH & Co. KGaA

DOI: 10.1002/admi.202100309

Abstract

Na1/2Bi1/2TiO3-based relaxor ferroelectrics are extensively investigated for use in transduction applications because of their relatively large electromechanical properties. Integration of these materials into devices, however, requires better temperature stability in addition to electromechanical properties. This work demonstrates a novel approach to enhance the temperature stability of the long-range ferroelectric order as well as to enhance electromechanical properties in a non-ergodic relaxor 0.93(Na1/2Bi1/2)TiO3-0.07BaTiO3 (NBT-7BT) without changing the chemical composition through, for example, chemical substitutions or second phase particles. The approach involves the room temperature deposition of copper electrodes directly on the relaxor ceramic substrate using the aerosol deposition (AD) method. The collision of solid-state particles with the substrate surface during AD results in large impact and residual stresses, inherent to the AD process, which are shown with piezo-response force microscopy to induce long-range ferroelectric domain ordering in non-ergodic relaxor NBT-7BT. Using Raman spectroscopy, the magnitude and depth profile of the stress-induced transformation are determined. It is demonstrated that deposition-induced stresses significantly increase the temperature stability of the electromechanical properties, where long-range ferroelectric ordering is observed up to 150 °C, which is approximately 41 °C higher than NBT-7BT samples without the AD processed electrode. Moreover, the AD treatment also facilitates ferroelectric domain switching at a lower electric field, enabling maximum polarization at a relatively lower field and an enhancement in the piezoelectric response. It is shown that the deposition-induced stress is responsible for such an enhancement. Importantly, this impact-stress-driven tailoring of electromechanical properties can potentially be utilized for other functional ceramic materials as well, where internal residual stress can result in enhanced functional properties.

Authors with CRIS profile

Neamul Hayet Khansur Lehrstuhl für Glas und Keramik Udo Eckstein Lehrstuhl für Glas und Keramik Martin Brehl Professur für Werkstoffwissenschaften (Glas und Keramik) Alexander Martin Lehrstuhl für Glas und Keramik Kevin Rieß Professur für Werkstoffwissenschaften (Funktionskeramik) Dominique de Ligny Professur für Werkstoffwissenschaften (Glas und Keramik) Kyle Grant Webber Professur für Werkstoffwissenschaften (Funktionskeramik)

Additional Organisation(s)

Graduiertenkolleg 2495 Energiekonvertierungssysteme: von Materialien zu Bauteilen (Energy Conversion Systems: From Materials to Devices)

Involved external institutions

Jožef Stefan Institute SI Slovenia (SI)

How to cite

APA:

Khansur, N.H., Eckstein, U., Ursic, H., Sadl, M., Brehl, M., Martin, A.,... Webber, K.G. (2021). Enhanced Electromechanical Response and Thermal Stability of 0.93(Na1/2Bi1/2)TiO3-0.07BaTiO3 Through Aerosol Deposition of Base Metal Electrodes. Advanced Materials Interfaces. https://doi.org/10.1002/admi.202100309

MLA:

Khansur, Neamul Hayet, et al. "Enhanced Electromechanical Response and Thermal Stability of 0.93(Na1/2Bi1/2)TiO3-0.07BaTiO3 Through Aerosol Deposition of Base Metal Electrodes." Advanced Materials Interfaces (2021).

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