Thermal decomposition of barium ferrate(VI): Mechanism and formation of FeIV intermediate and nanocrystalline Fe2O3 and ferrite
| Autor: | Erno Kuzmann, Radina P. Kralchevska, Libor Machala, Jan Filip, Zoltán Homonnay, Virender K. Sharma |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Mechanical Engineering
Inorganic chemistry Thermal decomposition Metals and Alloys Oxide 010501 environmental sciences 010402 general chemistry 01 natural sciences Nanocrystalline material 0104 chemical sciences chemistry.chemical_compound chemistry Mechanics of Materials Barium ferrate Materials Chemistry Ferrite (magnet) Barium carbonate Thermal analysis Barium ferrite 0105 earth and related environmental sciences |
| Zdroj: | Journal of Alloys and Compounds. 668:73-79 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2016.01.185 |
| Popis: | Simple high-valent iron-oxo species, ferrate(VI) (FeVIO42−, Fe(VI)) has applications in energy storage, organic synthesis, and water purification. Of the various salts of Fe(VI), barium ferrate(VI) (BaFeO4) has also a great potential as a battery material. This paper presents the thermal decomposition of BaFeO4 in static air and nitrogen atmosphere, monitored by combination of thermal analysis, Mossbauer spectroscopy, X-ray powder diffraction, and electron-microscopic techniques. The formation of FeIV species in the form of BaFeO3 was found to be the primary decomposition product of BaFeO4 at temperature around 190 °C under both studied atmospheres. BaFeO3 was unstable in air reacting with CO2 to form barium carbonate and speromagnetic amorphous iron(III) oxide nanoparticles ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect