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- W2608174049 abstract "Lead-free [KNbO3]0.9 – [BaNi0.5Nb0.5O3]0.1 (KBNNO) perovskite powders are synthesized by the solid-state combustion technique. Phase identification and the crystal structure change at various calcination temperatures Tcal are carried out by X-ray diffraction (XRD) technique. Local structure distortion is studied by X-ray absorption spectroscopy (XAS) for revealing X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS). The XRD result shows that the structure of KBNNO changes from pseudo-cubic to weakly tetragonal structure when the calcination temperature increases. The extracted parameters from Nb L3-edge and K K-edge XANES signals show that the KBNNO structure formed at high Tcal (≥750 °C) has an orthorhombic structure. In addition, the fitted EXAFS spectra indicate a decrease of interatomic distances for three shells when Tcal increases. The obtained structural distortion difference from XRD and XAS can be explained by the fact that XRD signal is from all atoms in the unit cell, while XAS can specifically probe the local structure of specific atoms in the unit cell." @default.
- W2608174049 created "2017-05-05" @default.
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- W2608174049 date "2017-01-01" @default.
- W2608174049 modified "2023-10-03" @default.
- W2608174049 title "Insight into an atomic arrangement of [KNbO3]0.9 – [BaNi0.5Nb0.5O3]0.1 powder formed at various calcination temperatures by X-ray absorption spectroscopy" @default.
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- W2608174049 doi "https://doi.org/10.1016/j.rinp.2017.04.029" @default.
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