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Kuhfuß, Michel
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Publications (7/7 displayed)
- 2024In situ electric field-dependent structural changes in (Ba,Ca)(Zr,Ti)O 3 with varying grain sizecitations
- 2024Influence of Grain Size on Electromechanical Properties of (Ba,Ca)(Zr,Ti)O3: A Multiscale Analysis Using Spark Plasma Sintering and Aerosol Depositioncitations
- 2024In situ electric field-dependent structural changes in (Ba,Ca)(Zr,Ti)O3 with varying grain sizecitations
- 2024Influence of Grain Size on Electromechanical Properties of (Ba,Ca)(Zr,Ti)O 3 : A Multiscale Analysis Using Spark Plasma Sintering and Aerosol Depositioncitations
- 2024Novel Sol-Gel Synthesis Route for Ce- and V-Doped Ba0.85Ca0.15Ti0.9Zr0.1O3 Piezoceramicscitations
- 2023Control of Microstructure in Iron–Carbon Thin Films by Means of Electromigration
- 2023Study on Growth of Tungsten Bronze Phase from Niobate Perovskite Ceramics in Controlled Atmosphere for Photoferroelectric Applicationscitations
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article
In situ electric field-dependent structural changes in (Ba,Ca)(Zr,Ti)O3 with varying grain size
Abstract
The functional properties of piezoelectric ceramic materials, such as barium titanate, are highly dependent on grain size. Lead-free polycrystalline Ba<sub>0.85</sub>Ca<sub>0.15</sub>Zr<sub>0.1</sub>Ti<sub>0.9</sub>O<sub>3</sub> (BCZT) samples were prepared with a combination of the hydrothermal method and spark plasma sintering to achieve grain sizes from 100 nm to 10 μm by varying the maximum sintering temperature. In this range, a transition from a nearly linear dielectric to a ferroelectric response can be seen in macroscopic electromechanical measurements, demonstrating the importance of grain size on functional properties in BCZT. Furthermore, in situ electric field-dependent synchrotron X-ray diffraction measurements were performed to quantify the intrinsic and extrinsic strain contributions and their variations with grain size. At lower grain sizes, the data revealed a significant loss of extrinsic contributions in the piezoelectric behavior, limiting the response to intrinsic contribution associated with lattice strain. For BCZT, a critical grain size between approximately 0.08 to 0.18 μm is proposed, below which no piezoelectric response was observed.