Preparation and characterization of amorphous nanometre sized Fe3O4 powder

被引：29
|
作者：
Cao, X
Koltypin, Y
Katabi, G
Prozorov, R
机构：
[1] BAR ILAN UNIV,DEPT CHEM,RAMAT GAN,ISRAEL
[2] BAR ILAN UNIV,DEPT PHYS,RAMAT GAN,ISRAEL
[3] HEBREW UNIV JERUSALEM,RACAH INST PHYS,IL-91904 JERUSALEM,ISRAEL
来源：
JOURNAL OF MATERIALS CHEMISTRY | 1997年 / 7卷 / 06期
关键词：
D O I：
10.1039/a606739e
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A method for the preparation of amorphous Fe3O4 powder with a particle size of ca. 25 nm is reported. Amorphous Fe3O4 powder can be simply synthesized by slowly exposing amorphous Fe powder to the air. The amorphous properties of Fe3O4 nanoparticles were characterized by X-ray diffraction, Mossbauer spectroscopy, transmission electron micrography, differential scanning calorimetry and quantum design SQUID magnetization measurements. This amorphous Fe3O4 powder is superparamagnetic and its magnetization at room temperature is very low (<1.5 emu g(-1)); it crystallizes at 285 +/- 15 degrees C.
引用
收藏
页码：1007 / 1009
页数：3
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