New anion-conducting solid solutions Bi1−xTex(O,F)2+δ (x > 0.5) and glass-ceramic material on their base
| Autor: | Alexander A. Vinogradov, E.I. Ardashnikova, J.-J. Videau, V.A. Prituzhalov, G. Van Tendeloo, V. A. Dolgikh, Nadezda V. Tarakina, Evelyne Fargin, Artem M. Abakumov |
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| Přispěvatelé: | Department of Chemistry, Moscow State University, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), Electron Microscopy for Materials Science (EMAT), University of Antwerp (UA) |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Analytical chemistry
Mineralogy 02 engineering and technology Activation energy Crystal structure Conductivity 010402 general chemistry 01 natural sciences Biochemistry law.invention Inorganic Chemistry law Environmental Chemistry Ionic conductivity Physical and Theoretical Chemistry Glass-ceramic Chemistry Physics Organic Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Electron diffraction 0210 nano-technology Powder diffraction Solid solution |
| Zdroj: | Journal of Fluorine Chemistry Journal of Fluorine Chemistry, Elsevier, 2011, 132 (12), pp.1110-1116. ⟨10.1016/j.jfluchem.2011.06.042⟩ Journal of fluorine chemistry |
| ISSN: | 0022-1139 |
| DOI: | 10.1016/j.jfluchem.2011.06.042⟩ |
| Popis: | International audience; The anion-excess fluorite-like solid solutions with general composition Bi1−xTex(O,F)2+δ (x > 0.5) have been synthesized by a solid state reaction of TeO2, BiF3 and Bi2O3 at 873 K with following quenching. The homogeneity areas and polymorphism of the I ↔ IV Bi1−xTex(O,F)2+δ phases were investigated. The crystal structure of the low temperature IV-Bi1−xTex(O,F)2+δ phase has been solved using electron diffraction and X-ray powder diffraction (a = 11.53051(9) Å, S.G. Ia-3, RI = 0.046, RP = 0.041). Glass formation area in the Bi2O3-BiF3-TeO2 (10% TiO2) system was investigated. IVBi1−xTex(O,F)2+δ phase starts to crystallize at short-time (0.5-3 h) annealing of oxyfluoride glasses at temperatures above Tg (600-615 K). The ionic conductivity of the crystalline Bi1−xTex(O,F)2+δ phase and corresponding glass-ceramics was investigated. Activation energy of conductivity Ea = 0.41(2) eV for the IV-Bi1−xTex(O,F)2+δ crystalline samples and Ea = 0.73 eV for the glass-ceramic samples were obtained. Investigation of the oxyfluoride samples with a constant cation ratio demonstrates essential influence of excess fluorine anions on the ionic conductivity. |
| Databáze: | OpenAIRE |
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