Details
| Original language | English |
|---|---|
| Article number | 012028 |
| Journal | Journal of Physics: Conference Series |
| Volume | 217 |
| Issue number | 1 |
| Publication status | Published - 2010 |
| Event | International Conference on the Applications of the Mossbauer Effect, ICAME 2009 - Vienna, Austria Duration: 19 Jul 2009 → 24 Jul 2009 |
Abstract
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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Journal of Physics: Conference Series, Vol. 217, No. 1, 012028, 2010.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Competing redox reactions in Fe-containing AlO(OH) and Al2O 3 matrices
T2 - International Conference on the Applications of the Mossbauer Effect, ICAME 2009
AU - Stößer, R.
AU - Menzel, M.
AU - Feist, M.
AU - Nofz, M.
AU - Renz, F.
PY - 2010
Y1 - 2010
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=77954664044&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/217/1/012028
DO - 10.1088/1742-6596/217/1/012028
M3 - Conference article
AN - SCOPUS:77954664044
VL - 217
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012028
Y2 - 19 July 2009 through 24 July 2009
ER -