利用还原共沉淀法制备纳米四氧化三铁磁性粉体  

Preparation of Nanosized Magnetism Fe3O4 Powders by Reduction Co-precipitation Method

作　　者：王缓[1] 徐利华[1] 邸云萍[1] 张菡[1] 

机构地区：[1]北京科技大学材料学院无机非金属系,北京100083

出　　处：《纳米科技》2007年第6期33-39,49,共8页

基　　金：This work was supported by the National Key Technologies R＆D Program （2006BAB 12B03, 2006BAB12B05） and the National Natural Science Foundation of China （50172008, 50332010）.

摘　　要：利用还原共沉淀法制备了纳米四氧化三铁。采用FT-IR、TEM、XRD、VSM和比表面积测试表征样品的性质。结果表明该方法制备的四氧化三铁颗粒程球形，平均粒径大约21nm。红外光谱表明了样品离子可以被表面活性刺有效包袱。磁滞回线测试结果表明该样品具有超顺磁性，其饱和磁化强度达到37．34Am^2／kg。Nanosize Fe3O4 particles were obtained by reduction co-precipitation. The properties of samples were characterized by Fourier transform infrared spectroscopy （FT-IR）, transmission electron microscopy （TEM）, X-ray powder diffraction （XRD）, vibrating sample magnetometer （VSM） and specific area test. The XRD results indicated that pure phase Fe3O4 was formed. The TEM results exhibited that Fe3O4 particles were spheric shape and its average grain size was about 21nm. The IR spectrum showed that the particles were coated effectively by surface active agent. The magnetic hysteresis loop implied that samples had superparamagnetism and their saturation magnetization reached 37.34 A·m^2kg.

关 键 词：纳米四氧化三铁粉体 铁分离 还原共沉淀 

分 类 号：TB34[一般工业技术—材料科学与工程]