低热固相反应法合成反尖晶石型NiFe_2O_4纳米晶  

Nanocrystalline Spinel NiFe_2O_4 Synthesis by Solid-state Reaction at Low Heat

作　　者：吴文伟[1] 侯生益[1] 廖森[1] 王铭钧[1] 吴学航[1] 李姝姝[1] 

机构地区：[1]广西大学化学化工学院,南宁530004

出　　处：《有色金属》2010年第3期39-42,共4页Nonferrous Metals

基　　金：广西自然科学基金资助项目(0640009);广西大型仪器协作共用网资助基金项目(360-2006-049)

摘　　要：以NiSO4.7H2O,Fe2(SO4)3和NH4HCO3为原料,在表面活性剂PEG-400存在下,先在室温下研磨反应混合物使其进行固相反应,然后用水洗去混合物中的可溶性无机盐后于80℃下烘干,即得纳米晶NiFe2O4前驱体。通过煅烧前驱体即得反尖晶石型NiFe2O4纳米晶产品。采用TG/DTA,IR,XRD和VSM对前驱体及其热解产品进行表征。结果表明,400℃下煅烧前驱体2h得到粒径约为17.2nm的反尖晶石型NiFe2O4纳米晶,其比饱和磁化强度为32.3emu/g。The nanocrystalline NiFe2O4 precursor is prepared with NiSO4·7H2O,Fe2(SO4)3 and NH4HCO3 as raw materials by grinding mixture in the presence of surfactant PEG-400 at room temperature,and washing mixture with water to remove soluble inorganic salts and drying at 80℃.The nanocrystalline NiFe2O4 with inverse spinel structure is obtained by calcining the precursor.The precursor and its calcined products are characterized by using TG/DTA,IR,XRD,and VSM.The results show that the inverse spinel nanocrystalline NiF...

关 键 词：磁性材料 铁酸镍 低热固相反应 磁性质 纳米粒子 

分 类 号：TB381[一般工业技术—材料科学与工程]