Výsledky vyhledávání - "C. A. Schwöbel"

Production of Fe nanoparticles from γ-Fe2O3 by high-pressure hydrogen reduction

Autor: C. A. Schwöbel, Alexander Zintler, Philipp Komissinskiy, Leopoldo Molina-Luna, Oliver Gutfleisch, I. Dirba

Publikováno v: Nanoscale Advances. 2:4777-4784

In this work, the reduction of iron oxide γ-Fe2O3 nanoparticles by hydrogen at high pressures is studied. Increasing the hydrogen pressure enables reduction of γ-Fe2O3 to α-Fe at significantly lower temperatures. At low pressures, a temperature of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a9cd1d9b4e6b9fbdaff8c8f92495835c
https://doi.org/10.1039/d0na00635a

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Synthesis, morphology, thermal stability and magnetic properties of α″-Fe16N2 nanoparticles obtained by hydrogen reduction of γ-Fe2O3 and subsequent nitrogenation

Autor: I. Dirba, Philipp Komissinskiy, Leopoldo Molina-Luna, Hans-Joachim Kleebe, C. A. Schwöbel, Michael Duerrschnabel, L.V.B. Diop, Kathrin Hofmann, Oliver Gutfleisch

Publikováno v: Acta Materialia
Acta Materialia, Elsevier, 2017, 123, pp.214-222. ⟨10.1016/j.actamat.2016.10.061⟩

Typical synthesis of α″-Fe16N2 nanoparticles involves reduction of iron oxides by hydrogen at elevated temperatures which is disadvantageous due to the particle coalescence. Here we report on a process for reduction of iron oxides at elevated pres

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d6299621ce6866a4e03a47ae9b4c46d
https://hal.archives-ouvertes.fr/hal-02379792

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Normal and abnormal grain growth in fine-grained Nd-Fe-B sintered magnets prepared from He jet milled powders

Autor: Gregor A. Zickler, F. Bittner, T.G. Woodcock, Ludwig Schultz, Oliver Gutfleisch, K. Üstüner, C. A. Schwöbel, Josef Fidler, M. Katter

Fine-grained, heavy rare earth free Nd-Fe-B sintered magnets were prepared from He jet milled powders with an average particle size of 1.5 µm by low temperature sintering at 920 °C or 980 °C. A coercivity of >1600 kA/m was achieved for an average

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b706d0adfb2cc70d945afd36ac7a735
https://publica.fraunhofer.de/handle/publica/247407

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Conclusion

Autor: C. E. Schwöbel