Fe-SiO_2磁性核壳复合粒制备与表征  

Preparation and Characterization of Fe-SiO_2 Magnetic Core-shell Composite Particles

作　　者：吴文华[1] 杨坤涛[1] 

机构地区：[1]华中科技大学,湖北武汉430074

出　　处：《安徽冶金科技职业学院学报》2005年第4期10-12,共3页Journal of Anhui Vocational College of Metallurgy and Technology

摘　　要：采用溶胶凝胶方法制备羰基铁/SiO2核壳复合粒子。采用SEM、TEM、XRD、VSM、TG-DSC测试手段对材料形貌、微观结构与性能进行表征。实验结果表明羰基铁粉粒子表面均匀地包覆非晶态SiO2纳米壳层。包覆后的核壳复合粒子仍具有很好的超顺磁性能,适当控制壳层的厚度可以提高超顺磁性能。同时抗氧化性能也明显提高。Carbonyl - iron composite particles were uniformity coated by the nano- SiO2 based on sol - gel method, the morphology, microstructure and properties of the composite particles were characterized by TEM .SEM. XRD.. DSC - TG, VSM. The results show that the prepared particles with core - shell structure have a shell within 40nm ;the coreshell particles remains super paramagnetic; Meanwhile, the resisting oxidation property is obviously improved.

关 键 词：核壳结构 磁性复合粒子 性能 二氧化硅 

分 类 号：TF122.1[冶金工程—粉末冶金]