Characterisation of Mn0.63Zn0.37Fe2O4 Powders After Intensive Milling and Subsequent Thermal Treatment

Authors

  • Nebojša Labus Institute of Technical Sciences of SASA
  • Zorka Vasiljević Institute of Technical Sciences of SASA
  • Obrad Aleksić Institute of Technical Sciences of SASA
  • Miloljub Luković Institute of Technical Sciences of SASA
  • Smilja Marković Institute of Technical Sciences of SASA
  • Vladimir Pavlović Institute of Technical Sciences of SASA
  • Slavko Mentus Faculty of Physical Chemistry, University of Belgrade and Serbian Academy of Sciences and Arts
  • Maria Vesna Nikolić Institute for Multidisciplinary Research, University of Belgrade

Abstract

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 sizer. 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.

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Published

2017-12-13

Issue

Vol. 49 No. 4 (2017)

Section

Articles