摘要
以硫酸亚铁、碳酸钠和石墨微球为主要原料,利用非均相成核法制备出Fe2O3.nH2O包覆石墨的前驱体微球,然后将前驱体微球于750℃下氢气还原2 h即得到了晶粒小于50 nm的α-Fe颗粒层包覆石墨的复合微球。利用SEM、EDS、FTIR、XRD和TG/DSC分别对前驱体及热处理产物的形貌、成分、物相组成以及前驱体热分解过程进行了表征和分析。并且通过实验,得出了制备前驱体的优化工艺参数。
The precursor microspheres of Fe2O3 ·nH2O coated with graphite were synthesized by the aqueous heterogeneous nucleation using ferrous（ Ⅱ ）sulfate, sodium carbonate and graphite microspheres as main raw materials. Subsequently, the α-Fe particles less than 50 nm in diameter coated graphite core-shell structural microspheres were successfully obtained by hydrogen reduction of the precursors at 750 ℃ for 2 hours. The morphology, composition, phases and thermal decomposition of the precursors and thermal-reduction products were characterized by using scanning electron microscopy （ SEM）, energy dispersive spectroscopy （ EDS）, Fourier transform infrared spectroscopy （ PTIR）, X-ray diffraction（XRD） and thermogravimetry-differential scanning calorimetry（TG/DSC） respectively. On the basis of experiments, optimized processing parameters of precursor fabrication were obtained.
出处
《矿冶工程》
CAS
CSCD
北大核心
2006年第5期75-78,共4页
Mining and Metallurgical Engineering
基金
江苏大学自然科学创新预研基金(04CX01)
关键词
纳米铁
石墨
非均相成核
nano iron
graphite
heterogeneous nucleation
