Mechanical milling of Fe3O4/SiO2: Formation of an amorphous
                Fe(II)-Si-O-containing phase

C.B. Koch; Jianzhong Jiang; Steen Mørup

Mechanical milling of Fe3O4/SiO2: Formation of an amorphous Fe(II)-Si-O-containing phase

C.B. Koch, Jianzhong Jiang, Steen Mørup

Department of Physics

Research output: Contribution to journal › Journal article › Research › peer-review

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

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title = "Mechanical milling of Fe3O4/SiO2: Formation of an amorphous Fe(II)-Si-O-containing phase",

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.",

author = "C.B. Koch and Jianzhong Jiang and Steen M{\o}rup",

year = "1999",

language = "English",

volume = "12",

pages = "233--236",

journal = "Nanostructured Materials",

issn = "0965-0773",

publisher = "Elsevier",

number = "1-4",

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TY - JOUR

T1 - Mechanical milling of Fe3O4/SiO2: Formation of an amorphous Fe(II)-Si-O-containing phase

AU - Koch, C.B.

AU - Jiang, Jianzhong

AU - Mørup, Steen

PY - 1999

Y1 - 1999

N2 - 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.

AB - 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.

M3 - Journal article

VL - 12

SP - 233

EP - 236

JO - Nanostructured Materials

JF - Nanostructured Materials

SN - 0965-0773

IS - 1-4

ER -