کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1332880 | 979058 | 2006 | 5 صفحه PDF | دانلود رایگان |
Maghemite sub-micrometer-sized spheres were successfully prepared by a simple solvothermal reduction route at relatively low temperature. The as-obtained sample was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), electron diffraction (ED), X-ray photoelectron spectroscopy (XPS) and superconducting quantum interference device (SQUID) measurements. XRD and XPS analyses indicate the formation of γ-Fe2O3 phase. TEM results reveal that the γ-Fe2O3 particles are spherical with the diameter of 200–400 nm. Magnetic measurements show that the Curie temperature of γ-Fe2O3 sub-microspheres is over 400 K and the sample exhibits ferromagnetic behavior at room temperature. It is found that the sub-microspheres possess high saturation magnetization of 81 emu/g at 300 K.
Maghemite sub-micrometer-sized spheres were successfully prepared by a simple solvothermal reduction route at relatively low temperature. TEM results indicated that γ-Fe2O3 powders consist of many spherical particles. The diameter of a single γ-Fe2O3 sub-microsphere can be estimated to be in the range of 200–400 nm.Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 179, Issue 5, May 2006, Pages 1554–1558