Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Formation of Bim+ 1Fem– 3Ti3O3m+ 3 (m = 4–9) Nanocrystals upon Thermal Decomposition of Coprecipitated Hydroxides. / Lomanova, N. A.; Tomkovich, M. V.; Osipov, A. V.; Ugolkov, V. L.; Panchuk, V. V.; Semenov, V. G.; Gusarov, V. V.
в: Russian Journal of Inorganic Chemistry, Том 66, № 5, 01.05.2021, стр. 755-764.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
}
TY - JOUR
T1 - Formation of Bim+ 1Fem– 3Ti3O3m+ 3 (m = 4–9) Nanocrystals upon Thermal Decomposition of Coprecipitated Hydroxides
AU - Lomanova, N. A.
AU - Tomkovich, M. V.
AU - Osipov, A. V.
AU - Ugolkov, V. L.
AU - Panchuk, V. V.
AU - Semenov, V. G.
AU - Gusarov, V. V.
N1 - Publisher Copyright: © 2021, Pleiades Publishing, Ltd.
PY - 2021/5/1
Y1 - 2021/5/1
N2 - Abstract: Nanocrystals of Bim+ 1Fem– 3Ti3O3m+ 3 (m = 4–9) Aurivillius phases were synthesized by thermal decomposition of a coprecipitated mixture of bismuth, iron, and titanium hydroxides. The average crystallite size in nanopowders depends on m and is 50–100 nm. The samples were characterized by simultaneous thermal analysis, elemental analysis, X-ray diffraction, and Mössbauer spectroscopy. It was shown that the onset of Bim+ 1Fem– 3Ti3O3m+ 3 crystallization is near the melting point of the bismuth oxide-based non-autonomous (surface) phase (450°C). The Bim+ 1Fem– 3Ti3O3m+ 3 compounds where m ≤ 5 crystallize in one stage. The compounds where m > 5 are formed in two stages. First, Aurivillius phases with m ≈ 5 and an amorphous phase are formed. Then, the components of the amorphous phase are incorporated into the perovskite-like blocks of the Aurivillius (m ≈ 5) phases, most likely through their outer perovskite-like layers. Then, the components are redistributed between the outer and inner layers of the perovskite-like blocks. The elucidated dependence of the formation mechanism of Bim+ 1Fem– 3Ti3O3m+ 3 nanocrystals on their composition can be used in the technology of directed synthesis of nanocrystalline multiferroics.
AB - Abstract: Nanocrystals of Bim+ 1Fem– 3Ti3O3m+ 3 (m = 4–9) Aurivillius phases were synthesized by thermal decomposition of a coprecipitated mixture of bismuth, iron, and titanium hydroxides. The average crystallite size in nanopowders depends on m and is 50–100 nm. The samples were characterized by simultaneous thermal analysis, elemental analysis, X-ray diffraction, and Mössbauer spectroscopy. It was shown that the onset of Bim+ 1Fem– 3Ti3O3m+ 3 crystallization is near the melting point of the bismuth oxide-based non-autonomous (surface) phase (450°C). The Bim+ 1Fem– 3Ti3O3m+ 3 compounds where m ≤ 5 crystallize in one stage. The compounds where m > 5 are formed in two stages. First, Aurivillius phases with m ≈ 5 and an amorphous phase are formed. Then, the components of the amorphous phase are incorporated into the perovskite-like blocks of the Aurivillius (m ≈ 5) phases, most likely through their outer perovskite-like layers. Then, the components are redistributed between the outer and inner layers of the perovskite-like blocks. The elucidated dependence of the formation mechanism of Bim+ 1Fem– 3Ti3O3m+ 3 nanocrystals on their composition can be used in the technology of directed synthesis of nanocrystalline multiferroics.
KW - Aurivillius phases
KW - BiFeO
KW - Mössbauer spectroscopy
KW - nanocrystals
KW - perovskite-like oxides
KW - thermal behavior
KW - PHASES
KW - BiFeO3
KW - BI5FETI3O15
KW - BEHAVIOR
KW - STABILITY
KW - Mö
KW - BIFEO3
KW - HYDROTHERMAL SYNTHESIS
KW - ssbauer spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85106941745&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/5741f297-de8f-3818-9c35-027f6fdf473b/
U2 - 10.1134/s0036023621050090
DO - 10.1134/s0036023621050090
M3 - Article
AN - SCOPUS:85106941745
VL - 66
SP - 755
EP - 764
JO - Russian Journal of Inorganic Chemistry
JF - Russian Journal of Inorganic Chemistry
SN - 0036-0236
IS - 5
ER -
ID: 87427424