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The effect of Sn for Ti substitution on the average and local crystal structure of BaTi1−xSnxO3 (0 ≤x≤ 0.20)

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2014
Authors
Veselinović, Ljiljana
Mitrić, Miodrag
Mančić, Lidija
Vukomanović, Marija
Hadžić, Branka
Marković, Smilja
Uskoković, Dragan
Article (Published version)
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Abstract
The effect of Sn for Ti substitution on the crystal structure of a perovskite, barium titanate stannate (BTS), BaTi1−xSnxO3 for x = 0, 0.025, 0.05, 0.07, 0.10, 0.12, 0.15 and 0.20, was investigated. The powders were prepared by the conventional solid-state reaction technique. The structural investigations of the BTS powders were done at room temperature by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), selected-area electron diffraction (SAED) and Raman spectroscopy analyses. Rietveld refinement of XRD data indicates that gradual replacement of titanium by tin in BaTiO3 provokes a phase transition from tetragonal for 0 ≤x≤ 0.07 to cubic for x = 0.12, 0.15 and 0.20. The coexistence of tetragonal (P4mm) and cubic (Pminline imagem) crystal phases was established in powder with nominal composition BaTi0.9Sn0.1O3. The crystal phases determined by Rietveld refinement were confirmed by HRTEM and SAED analyses. The crystal structures of the... BTS powders at short-range scale were studied by Raman spectroscopy, which shows tetragonal (P4mm) and a small fraction of orthorhombic (Pmm2) crystal phases for all the examined BTS powders, implying a lower local ordering when compared to the average symmetry.

Keywords:
perovskites / phase transitions / barium titanate stannate
Source:
Journal of Applied Crystallography, 2014, 47, 3, 999-1007
Publisher:
  • Hoboken, NJ : John Wiley & Sons
Projects:
  • Molecular designing of nanoparticles with controlled morphological and physicochemical characteristics and functional materials based on them (RS-45004)

DOI: 10.1107/S1600576714007584

ISSN: 1600-5767

WoS: 000336738500020

Scopus: 2-s2.0-84901832760
[ Google Scholar ]
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URI
http://dais.sanu.ac.rs/123456789/668
Collections
  • ITN SANU - Opšta kolekcija / ITS SASA - General collection
Institution
Институт техничких наука САНУ / Institute of Technical Sciences SASA

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