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- W2912999802 abstract "$(mathrm{B}{mathrm{i}}_{1/2}mathrm{N}{mathrm{a}}_{1/2})mathrm{Ti}{mathrm{O}}_{3}$-based solid solutions, one of the major systems of lead-free piezoelectric ceramics, exhibit a low thermal depolarization temperature (${T}_{mathrm{d}}ensuremath{sim}100{phantom{rule{0.16em}{0ex}}}^{ensuremath{circ}}mathrm{C}$). It was reported that by incorporating 30 mol% ZnO particles to form a ceramic composite of ${(mathrm{B}{mathrm{i}}_{1/2}mathrm{N}{mathrm{a}}_{1/2})}_{0.94}mathrm{B}{mathrm{a}}_{0.06}mathrm{Ti}{mathrm{O}}_{3}$/ZnO, the depolarization process can be shifted up to ensuremath{sim}250 ifmmode^circelsetextdegreefi{}C. In the present work, a variety of advanced transmission electron microscopy techniques, including in situ heating, annular bright-field, high-angle annular dark-field, geometric phase analysis, energy-dispersive spectrum and electron energy-loss spectroscopy, are employed to investigate the underlying mechanisms for the enhanced thermal stability of polarization in the composite. It is found that the abrupt depolarization in ${(mathrm{B}{mathrm{i}}_{1/2}mathrm{N}{mathrm{a}}_{1/2})}_{0.94}mathrm{B}{mathrm{a}}_{0.06}mathrm{Ti}{mathrm{O}}_{3}$ at ${T}_{mathrm{d}}$ becomes diffused over a wide temperature window up to the temperature at maximum dielectric constant (${T}_{mathrm{m}}$) under the combined actions of the incorporation of Zn into the perovskite lattice, the presence of residual stresses, and the pinning effect on micron-sized domains provided by ZnO particles." @default.
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- W2912999802 date "2019-02-06" @default.
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- W2912999802 title "Mechanisms of enhanced thermal stability of polarization in lead-free <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mi mathvariant=normal>B</mml:mi><mml:msub><mml:mi mathvariant=normal>i</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:mi mathvariant=normal>N</mml:mi><mml:msub><mml:mi mathvariant=normal>a</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:…" @default.
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- W2912999802 doi "https://doi.org/10.1103/physrevmaterials.3.024402" @default.
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