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- W2023773863 abstract "Piezoceramics 0.99[( Bi 0.5 Na 0.4 K 0.1 ) 1− x La x TiO 3 ]−0.01[ Ba 0.7 Sr 0.3 TiO 3 ] ( BNKT – BST – La x , x = 0–0.030) were synthesized using a conventional solid‐state reaction method. X‐ray diffraction revealed a phase transition from a tetragonal to cubic phase at x ≥ 0.005. The maximum dielectric constant as well as the depolarization temperature ( T d ) decreased with increasing La content. La addition interrupted the polarization and strain hysteresis loops and demonstrates that the ferroelectric order of the BNKT–BST ceramics lead to a reduction in the remnant polarization and coercive field. However, the destabilization of the ferroelectric order is accompanied by a significant increase in the unipolar strain which is highest at x = 0.020 with a value of ~0.39% and corresponding normalized strain, d * 33 (= S max / E max ) of 650 pm/V. It was observed that the unipolar strain of x = 0.020 is very temperature insensitive up to 125°C, even at 125°C the d * 33 is as high as ~431 pm/V. Moreover, an electric‐field‐dependent XRD was conducted to identify the main source of the high strain and a recoverable transformation from cubic to a rhombohedral–tetragonal mixed phase was observed. The recoverable field‐induced phase transformation is suggested to be the main cause for the obtained large strain at x = 0.020 in the BNKT – BST – La x ceramics." @default.
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- W2023773863 date "2014-04-30" @default.
- W2023773863 modified "2023-10-07" @default.
- W2023773863 title "Large Electromechanical Response in Lead-Free La-Doped BNKT-BST Piezoelectric Ceramics" @default.
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- W2023773863 doi "https://doi.org/10.1111/jace.12952" @default.
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