Competing redox reactions in Fe-containing AlO(OH) and Al2O3 matrices: A combined investigation by Mössbauer, ESR spectroscopy and thermal analysis
- The investigation of iron-doped AlO(OH)/Al2O3 systems revealed that the combined employment of Mössbauer and ESR spectroscopies together with thermal analysis yields meaningful data with complementary information. This mutual complementarity is based on the coexistence of Fe point defects with the corresponding aggregated FeOx species which has been observed even for very low Fe concentrations. Competing redox processes between the dopant, the AlOx matrix, and the gas atmosphere during the thermal treatment enable the generation of solid phases exhibiting specific chemical properties. The entire reaction process is influenced by a specific mechanical and thermal pre-treatment that affects predominantly oxydative processes in the matrix. A protecting influence of the matrix preventing further reductive attack of the Fe3+ Fe2+ ions by hydrogen has been established.
Autor*innen: | R. Stößer, Michael Menzel, M. Feist, Marianne NofzORCiD, F. Renz |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Journal of physics / Conference series |
Jahr der Erstveröffentlichung: | 2010 |
Verlag: | IOP Publ. |
Verlagsort: | Bristol, UK |
Jahrgang/Band: | 217 |
Ausgabe/Heft: | 1 |
Erste Seite: | 012028-1 - 012028-5 |
Freie Schlagwörter: | Al2O3; ESR spectroscopy; Fe(0); Fe(2+); Fe(3+); Magnetite; Mössbauer; Thermal analysis |
DOI: | 10.1088/1742-6596/217/1/012028 |
URL: | http://iopscience.iop.org/1742-6596/217/1/012028/pdf/1742-6596_217_1_012028.pdf |
ISSN: | 1742-6588 |
ISSN: | 1742-6596 |
Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
Datum der Freischaltung: | 19.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 02.09.2010 |