Title :
Structural and magnetic characteristic of novel method of Fe2 O3⇒Fe3O4 reduction by magnetomechanical activation
Author :
Kaczmarek, W.A. ; Onyskiewicz, I. ; Ninham, B.W.
Author_Institution :
Res. Sch. of Phys. Sci. & Eng., Australian Nat. Univ., Canberra, ACT, Australia
fDate :
11/1/1994 12:00:00 AM
Abstract :
A magnetomechanical activation technique has been used to produce fine particles of magnetite from hematite. The phase transformation of Fe2O3 into Fe3O4 was effected at room temperature by wet milling in vacuum. X-ray diffraction and scanning electron microscopy methods were used to find detailed information on the crystallography and morphology of magnetite formation as a function of processing time. A correlation was established between magnetic hysteresis parameters and the observed crystal structure evolution
Keywords :
X-ray diffraction; crystal structure; ferrites; iron compounds; machining; magnetic hysteresis; magnetomechanical effects; reduction (chemical); scanning electron microscopy; 300 K; Fe2O3; Fe3O4; X-ray diffraction; crystal structure; crystallography; hematite; magnetic hysteresis; magnetite; magnetomechanical activation; morphology; phase transformation; reduction; scanning electron microscopy; wet milling; Iron; Magnetic analysis; Magnetic hysteresis; Magnetic materials; Magnetic separation; Milling; Powders; Surface morphology; Temperature; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
