Abstract
The product of ball milling of magnetite and amorphous silica (40
mole% Fe3O4 in SiO2) for an extended period of time (800 h) in a
closed vial, has been investigated by Mossbauer spectroscopy,
X-ray diffraction and infrared spectroscopy. It is found that the
milling induces extensive reduction of Fe(III). The material
constitutes a mixture of ultrafine Fe-rich spinel particles
(magnetite/maghemite) and ail amorphous Fe(II)-containing silicate
with a magnetic transition temperature of approximately 25 K. The
amorphous phase has a rather high Fe content and is distinctly
differenct from the initial amorphous silica.
| Original language | English |
|---|---|
| Journal | Nanostructured Materials |
| Volume | 12 |
| Issue number | 1-4 |
| Pages (from-to) | 233-236 |
| ISSN | 0965-0773 |
| Publication status | Published - 1999 |
Cite this
Koch, C. B., Jiang, J., & Mørup, S. (1999). Mechanical milling of Fe3O4/SiO2: Formation of an amorphous
Fe(II)-Si-O-containing phase. Nanostructured Materials, 12(1-4), 233-236.