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- W2770486504 abstract "An approach to greatly enhance the piezoelectric properties ($ensuremath{sim}400$ pC/N) of the tetragonal $mathrm{BaTi}{mathrm{O}}_{3}$ polycrystal using a small number of $A$-site acceptor-donor substitutions [D. Xu et al., Acta Mater. 79, 84 (2014)] has been proposed. In this study, $mathrm{Pb}(mathrm{ZrTi}){mathrm{O}}_{3}$ (PZT) based polycrystals with various crystal symmetries (tetragonal, rhombohedral, and so on) were chosen to investigate the piezoelectricity enhancement mechanism. X-ray diffraction results show that doping generates an intrinsic uniaxial compressive stress along the ${[001]}_{mathrm{pc}}$ direction in the $AB{mathrm{O}}_{3}$ lattices. Piezoelectric maps in the parameter space of temperature and Ti concentration in the PZT and doped system show a more significant enhancement effect of $mathrm{L}{mathrm{i}}^{+}text{ensuremath{-}}mathrm{A}{mathrm{l}}^{3+}$ codoping in tetragonal PZT than in the rhombohedral phase. Phenomenological thermodynamic analysis indicates that the compressive stress results in more serious flattening of the free-energy profile in tetragonal PZT, compared with that in the rhombohedral phase. The chemical stress obtained by this acceptor-donor codoping can be utilized to optimize the piezoelectric performance on the tetragonal-phase site of the morphotropic phase boundary in the PZT system. The present study provides a promising route to the large piezoelectric effect induced by chemical-stress-driven flattening of the free-energy profile." @default.
- W2770486504 created "2017-12-04" @default.
- W2770486504 creator A5005175176 @default.
- W2770486504 creator A5014921394 @default.
- W2770486504 creator A5024749626 @default.
- W2770486504 creator A5043976758 @default.
- W2770486504 creator A5052501165 @default.
- W2770486504 creator A5088835989 @default.
- W2770486504 date "2017-11-17" @default.
- W2770486504 modified "2023-10-16" @default.
- W2770486504 title "Enhanced piezoelectricity in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>A</mml:mi><mml:mi>B</mml:mi><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math> ferroelectrics via intrinsic stress-driven flattening of the free-energy profile" @default.
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