Abstract
Ellipsoidal FeCO 3 microcrystals with length of ∼5–6.5 μm and width of ∼2.5–3.5 μm have been synthesized by an ascorbic acid assisted hydrothermal process. Both microsized ellipsoidal Fe 2O 3 and Fe 3O 4 microparticles were obtained using the spindle FeCO 3 as sacrificial templates via direct thermal decomposition and sealed thermal decomposition for 2 h at 500 °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 FeCO 3 micron crystals were also investigated.
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