Berlin 2024 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 12: Materials for Storage and Conversion of Energy III
MM 12.3: Vortrag
Montag, 18. März 2024, 16:15–16:30, C 264
Piezoresponse force microscopy on BaTiO3 based relaxors — •Markus Kratzer1, Philipp Münzer1, Christian Maier3, Klaus Reichmann3, Marco Deluca2, and Christian Teichert1 — 1Chair of Physics, Montanuniversität Leoben, Leoben, AUT — 2Materials Center Leoben, Leoben, AUT — 3Institute for Chemistry and Technology of Materials, TU Graz, Graz, AUTGraz,
Electrical energy storage systems with high energy- and power density are of great interest in electronics. A possible material choice to realize such devices are relaxor ceramics. Lead-free examples are BaTiO3 based systems, where the relaxor behavior is obtained via the disruption of the ferroelectric long-range order by replacing Ti4+ by homo- or heterovalent substitutes in BaTiO3’s perovsike unit cell. Here, the microscopic ferroelectric behavior of BaTiO3 with increasing amounts of Zr4+ and Nb5+ has been investigated utilizing piezo response force microscopy. The investigations reveal that the disruption of the ferroelectric long-range order is highly sensitive to the amount and type of substitutes.
Keywords: Relaxor; Piezoresponse force microscopy; Bariumtitanate; Electrical energy storage systems; Heterovalent/Homovalent Substitutes