激光气相合成氧化铁超细粉  

Syntheses of γ-Fe_2O_3/Fe_2O_3 Ultrafine Powders by Laser Induced Vapor-Phase Reaction Method

作　　者：蔺恩惠 李新勇[1] 郭跃华 张昌言[1] 

机构地区：[1]西北师范大学化学所

出　　处：《无机材料学报》1996年第1期157-161,共5页Journal of Inorganic Materials

摘　　要：本文采用激光气相反应法，以脉冲ＣＯ２激光器为光源、Ｆｅ（ＣＯ）２／Ｏ２为反应物，合成了Ｆｅ２Ｏ３超细粉，并发现制备的γ－Ｆｅ２Ｏ３超细粉呈规则的正多边形晶体，研究了该粉体生成的条件和特性，本法具有良好的工业应用前景。?Fe2O3/Fe2O3 ultrafine powders were synthesized by laser induced vapor-phase reaction method, with an IR pulsed CO2 laser as light source and Fe(CO)5/O2 as reactant. This paper discussed the optimum experimental conditions and laser chemistry rules. IR, XRD, TEM and XPS were used to characteral the ultrafine powders. The experimental γ-Fe2O3 ultrafine powders and amorphous Fe2O3 ultrafine powders, the diameters of the γ-Fe2O3 ultrafine powders were in the range of 125-1000, while that of the spherical amorphous Fe2O3 ultrafine powders were in the range of 50-120. It was first observed that the shape of the crystalline γ-Fe2O3 ultrafine powders produced by laser vapor-phase reaction were not spherical, but regular polygon. The γ-Fe2O3/Fe2O3 ultrafine powders had a good catalogic activity and chemical selectivity for CO oxidation. Laser induced vapor-phase reaction method to synthesize iron oxide ultrafine powders can have a good prospect in industrial applications.

关 键 词：激光 超细粉 气相合成 Γ-FE2O3 氧化铁 

分 类 号：TQ586.1[化学工程—精细化工]