Berlin 2024 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 28: Solid-Liquid Interfaces II: Structure and Spectroscopy

O 28.10: Vortrag

Dienstag, 19. März 2024, 12:45–13:00, H 1012

Electrokinetic Measurement: A Tool for Characterization of Piezoelectric Materials in liquid media — •Mohsen Sadeqi-Moqadam and Julia Glaum — Department of Materials Science and Engineering, Norwegian University of Science and Technology

Piezoelectric materials have pervasive applications across industries like telecommunications, automotive, electronics, and aerospace. Recently, their use in liquid environments for biomedical engineering, electrochemistry, and electromechanical systems has surged, prompting inquiries into their behavior and performance in such conditions. To probe this, an innovative experimental setup was devised, employing electrokinetic measurements to characterize polarized piezoelectric materials like lead zirconate titanate under mechanical stress (up to 150 MPa) in liquid media. This setup revealed a direct link between applied stress and the piezoelectric sample's electrokinetic response. Dynamic stress variations closely mirrored changes in the sample's electrokinetic behavior and affected the flow cell's resistance. Conversely, the non-piezoelectric alumina sample showed negligible alterations in both electrokinetics and resistance during stress application. Finite element modeling further supported these experimental findings, showcasing consistent outcomes for the electrical processes induced by mechanical stress variations on piezoelectric samples. This exploration sheds light on understanding and predicting piezoelectric material responses within liquid environments, impacting diverse fields reliant on their functionality.

Keywords: Characterization Method; Electrokinetic Measurement; Piezoelectric Material; Finite Element Modeling; Liquid Media