节点文献
NH3·H2O共沉淀法制备尖晶石型CoxZn1-xFe2O4纳米晶
Preparation of spinel CoxZn1-xFe2O4 nanocrystallines by ammonia Co-precipitation method
【Author】 LI Yang,LAI Xin,GAO Dao-jiang,BI Jian,LIN Dun-min (College of Chemistry & Materials Science,Sichuan Normal University,Chengdu 610066,China)
【机构】 四川师范大学化学与材料科学学院;
【摘要】 以CoSO4、ZnSO4和Fe2(SO4)3为原料,氨水为沉淀剂,利用化学共沉淀法制备氢氧化物前驱体,在750℃下锻烧3h后得到CoxZn1-xFe2O4纳米晶;通过SEM、XRD和VSM分别对CoxZn1-xFe2O4纳米晶的形貌、尺寸、结构和磁性能等进行表征。结果表明制备的CoxZn1-xFe2O4均为尖晶石结构,晶粒为球形,粒径在20~40nm之间。样品的比饱和磁化强度(σs)、矫顽力(Hc)随钴含量的增加而增加,逐渐从ZnFe2O4的顺磁性转变为CoFe2O4的亚铁磁性。
【Abstract】 Using CoSO4,ZnSO4 and Fe2(SO4)3 as raw materials,ammonia as precipitant,hydroxide precursors were prepared by chemical coprecipitation method,after being sintered at 750℃for 3h,the CoxZn1-xFe2O4 nanocrystallines were obtained.By through XRD,SEM and VSM measurements,the morphology,grain size, crystal structure and magnetic properties of CoxZn1-xFe2O4 nanocrystallines were investigated.The results show that all the samples are pure spinel structure;the obtainted CoxZn1-xFe2O4 particles are spherical and the mean grain size is about 20-40nm.The specific saturation magnetization(σs) and coercive force(Hc) of the samples increase with the increasing content of cobalt in the CoxZn1-xFe2O4 nanocrystallines,and it gradually transforms from the paramagnetism of ZnFe2O4 to the ferrimagnetism of CoFe2O4.
【Key words】 NH3·H2O; co-precipitation method; CoxZn1-xFe2O4 nanocrystallines; preparation;
- 【会议录名称】 第七届中国功能材料及其应用学术会议论文集(第4分册)
- 【会议名称】第七届中国功能材料及其应用学术会议
- 【会议时间】2010-10-15
- 【会议地点】中国湖南长沙
- 【分类号】TB383.1
- 【主办单位】中国仪器仪表学会仪表材料分会、重庆仪表材料研究所、中南大学、《功能材料》期刊社