Characterisation of Mn0.63Zn0.37Fe2O4 powders after intensive milling and subsequent thermal treatment
Commercial Mn-Zn powder (Mn0.63Zn0.37Fe2O4, 93 wt. % and Fe2O3 7 wt. %) was milled 0.5, 1, 2 and 4 hours in a planetary ball mill. The goal was to observe intensive milling influences on oxidation and reduction processes that will happen during subsequent heating. Powders were characterized with XRD...
Gespeichert in:
Veröffentlicht in: | Science of sintering 2017, Vol.49 (4), p.455-467 |
---|---|
Hauptverfasser: | , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | Commercial Mn-Zn powder (Mn0.63Zn0.37Fe2O4, 93 wt. % and Fe2O3 7 wt. %) was
milled 0.5, 1, 2 and 4 hours in a planetary ball mill. The goal was to
observe intensive milling influences on oxidation and reduction processes
that will happen during subsequent heating. Powders were characterized with
XRD, SEM and particle seizer. Subsequent heating was monitored on TGA/DTA in
an air atmosphere. After compaction of the milled powders, sintering was also
performed in a dilatometric device. Sintered specimens were characterized
micro structurally with SEM on a fresh breakage. Obtained differential TGA
diagrams suggest intensive changes during prolonged milling of the oxidation
kinetics on heating. Ferrite powders changed with milling as well as with
second run heating were characterized to enable determination of the
potentially best ratio of milling and heating to be applied to obtain the
desired microstructure. |
---|---|
ISSN: | 0350-820X 1820-7413 |
DOI: | 10.2298/SOS1704455L |