Berlin 2024 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 17: Poster Ib
MM 17.11: Poster
Monday, March 18, 2024, 18:30–20:30, Poster F
Functional properties of aerosol deposited thick lead-free piezoelectric ceramic films — •Michel Kuhfuß1, Juliana G. Maier1, Alexander Martin2, Ken-ichi Kakimoto2, Neamul H. Khansur1, and Kyle G. Webber1 — 1Department of Materials Science and Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Germany — 2Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Nagoya, Japan
The powder aerosol deposition (AD) method is a technique to deposit thick, dense ceramic films through room temperature impact consolidation (RTIC). AD is a promising method for applications such as piezoelectric energy harvesting due to being cost-effective and rapid. However, deposited films differ from bulk ceramics due to internal stress, RTIC-induced defects, and nanometer-range grain size. Therefore, the impact on the functional properties of different lead-free piezoelectric materials is investigated with electromechanical measurements. They reveal a direct connection between the piezoelectric response and the grain size. For comparison, the grain size dependence is analyzed with in situ electric field-dependent synchrotron X-ray diffraction. Further, processing methods such as annealing are conducted to enhance the properties of the deposited films.
Keywords: Energy Conversion; Piezoelectric; Lead-free ceramics; Aerosol deposition; Thick films