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- W4294549692 abstract "Abstract High‐power piezoelectric energy harvesters (PEHs) require piezoceramics with a large k p and d 33 but small ε T 33 / ε 0 values. The [0 0 1]‐textured 0.96(Na, K)(Nb 1− x Sb x )–0.04SrZrO 3 piezoceramics ( x = 0.025 and 0.045) exhibited the improved electromechanical coupling factor ( k p ) and piezoelectric charge constant ( d 33 ); however, the increase of dielectric constant ( ε T 33 / ε 0 ) was not significant. Further, the textured piezoceramic with x = 0.045 shows the large d 33 × g 33 value of 21.5 pm 2 /N, where g 33 is piezoelectric voltage constant, indicating that texturing is a good technique to fabricate the piezoceramics for PEH. The impedance curve of the PEH consisting of the metal substrate and textured piezoceramic shows a piezoelectric resonance peak at a low frequency, which is the same as the mechanical resonance frequency of the PEH. Hence, the PEH can be considered a piezoelectric material. The figure of merit of the PEH was determined using the mechanical quality and electromechanical coupling factor calculated from the impedance curve of the PEH. A large power output of 1.7 mW was obtained from the type‐1 PEH at the resonance frequency produced using the textured thick film ( x = 0.045). Hence, this PEH can be used as a permanent power source for microelectronic devices in the Internet of Things." @default.
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- W4294549692 date "2022-09-12" @default.
- W4294549692 modified "2023-10-01" @default.
- W4294549692 title "High‐power piezoelectric energy harvester produced using [0 0 1]‐textured (Na, K)NbO <sub>3</sub> ‐based lead‐free piezoceramics" @default.
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- W4294549692 doi "https://doi.org/10.1111/jace.18770" @default.
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