Preparation and characterization of microsized FeCO₃, Fe₃O₄ and Fe₂O₃ with ellipsoidal morphology

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• 作者：Shouhu Xuan ; Mingwei Chen ; Lingyun Hao ; Wanquan Jiang ; Xinglong Gong ; Yuan Hu ; Zuyao Chen
• 关键词：Ellipsoidal ; Magnetic ; Microsized ; Hydrothermal ; Heating treatment
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2008
• 出版时间：February 2008
• 年：2008
• 卷：320
• 期：3-4
• 页码：164-170
• 全文大小：931 K

文摘

Ellipsoidal FeCO₃ 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 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 °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.