Xuan SH, Chen MW, Hao LY, Jiang WQ, Gong XL, Hu Y, Chen ZY (2008) Preparation and characterization of microsized FeCO3, Fe3O4 and Fe2O3 with ellipsoidal morphology. Journal of Magnetism and Magnetic Materials 320(3-4), 164-170. [In English]

Web link: http://dx.doi.org/10.1016/j.jmmm.2007.05.019

Keywords:

ellipsoidal; magnetic; microsized; hydrothermal; heating treatment; magnetic-properties; nanorods; nanoparticles; growth

Abstract: Ellipsoidal FeCO3 microcrystals with length of similar to 5-6.5 mu m and width of similar to 2.5-3.5 mu m have been synthesized by an ascorbic acid assisted hydrothermal process. Both microsized ellipsoidal Fe2O3 and Fe3O4 microparticles were obtained using the spindle FeCO3 as sacrificial templates via direct thermal decomposition and sealed thermal decomposition for 2 h at 500 degrees C, respectively. The products were characterized with the X-ray powder diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy and superconducting quantum interference device magnetometer. The influences of the experimental factors on growth of the FeCO3 micron crystals were also investigated. (C) 2007 Elsevier B.V. All rights reserved.