In:
Journal of Applied Crystallography, International Union of Crystallography (IUCr), Vol. 49, No. 5 ( 2016-10-01), p. 1726-1733
Kurzfassung:
Neutron powder diffraction (NPD) was employed to further investigate the BaTi 1− x Sn x O 3 (BTS) system previously studied by X-ray diffraction. The room-temperature phase compositions and crystal structures of BTS samples with x = 0, 0.025, 0.05, 0.07, 0.10, 0.12, 0.15 and 0.20 were refined by the Rietveld method using NPD data. It is well known that barium titanate powder ( x = 0) crystallizes in the tetragonal P 4 mm space group. The crystal structures of the samples with 0.025 ≤ x ≤ 0.07 were refined as mixtures of P 4 mm and Amm 2 phases; those with x = 0.1 and 0.12 show the coexistence of rhombohedral R 3 m and cubic phases, while the samples with x = 0.15 and 0.20 crystallize in a single cubic Pm{\overline 3}m phase. Temperature-dependent NPD was used to characterize the BaTi 0.95 Sn 0.05 O 3 sample at 273, 333 and 373 K, and it was found to form single-phase Amm 2, P 4 mm and Pm{\overline 3}m structures at these respective temperatures. The NPD results are in agreement with data obtained by differential scanning calorimetry and dielectric permittivity measurements, which show a paraelectric–ferroelectric transition (associated with structural transition) from Pm{\overline 3}m to P 4 mm at about 353 K followed by a P 4 mm to Amm 2 phase transition at about 303 K.
Materialart:
Online-Ressource
ISSN:
1600-5767
DOI:
10.1107/S1600576716013157
DOI:
10.1107/S1600576716013157/ks5519sup1.cif
DOI:
10.1107/S1600576716013157/ks5519BTS5_0Csup2.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS5_60Csup3.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS5_110Csup4.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS2.5Tetragonalsup5.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS2.5Orthorombicsup6.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS5Tetragonalsup7.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS7Tetragonalsup8.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS7Orthorhombicsup9.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS10Cubicsup10.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS10Rhombohedralsup11.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS12Cubicsup12.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS12Rhombohedralsup13.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS15sup14.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS20sup15.hkl
DOI:
10.1107/S1600576716013157/ks5519BTsup16.hkl
DOI:
10.1107/S1600576716013157/ks5519BTS5Orthorhombicsup17.hkl
Sprache:
Unbekannt
Verlag:
International Union of Crystallography (IUCr)
Publikationsdatum:
2016
ZDB Id:
2020879-0
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