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《利用还原共沉淀法制备纳米四氧化三铁磁性粉体_英文》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、------------------------------------------------------------------------------------------------利用还原共沉淀法制备纳米四氧化三铁磁性粉体_英文_第6期2007年12月纳米科技Nanoscience&NanotechnologyNo.6December2007PreparationofNanosizedMagnetismFe3O4PowdersbyReductionCo-precipitationMethodWANGHuan,XULi-hua,DIYun-ping,China)ZHANGHan(De
2、partmentofInorganicNon-metallicMaterials,UniversityofScienceandTechnologyBeijing,Beijing100083,Abstract:NanosizeFe3O4partic——————————————————————————————————————------------------------------------------------------------------------------------------------leswereobtainedbyreductionco-precipitation.
3、ThepropertiesofsampleswerecharacterizedbyFouriertransforminfraredspectroscopy(FT-IR),transmissionelectronmicroscopy(TEM),X-raypowderdiffraction(XRD),vibratingsamplemagnetometer(VSM)andspecif-icareatest.TheXRDresultsindicatedthatpurephaseFe3O4wasformed.TheTEMresultsexhibitedthatFe3O4particlesweresphe
4、ricshapeanditsaveragegrainsizewasabout21nm.TheIRspectrumshowedthattheparticleswerecoatedeffectivelybysurfaceactiveagent.Themagnetichysteresisloopimpliedthatsampleshadsuperparamagnetismandtheirsaturationmagnetizationreached37.34A?m2kg.Keywords:nanosizedFe3O4powders;ironseparation;reductionco-————————
5、——————————————————————————————------------------------------------------------------------------------------------------------precipitation利用还原共沉淀法制备纳米四氧化三铁磁性粉体王缓,徐利华,邸云萍,张北京菡100083)(北京科技大学材料学院无机非金属系,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
6、以被表面活性剂有效包袱。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37.34Am2/kg。关键词:纳米四氧化三铁粉体;铁分离;还原共沉淀中图分类号:TB34文献标识码:A文章编号:1812-1918(2007)06-0033-080INTRODUCTION——————————————————————————————————————------------------------------------------------------------------------------------------------Asanimportantmemberofspineltyp
7、eferrite,[10].Furthermore,somepreparationshavealreadybeenapprovedforclinicaluse,suchasimprovedMRIdiagnosticcontrastagents,cellseparation,tu-morhyperthermia,retinaldetachmenttherapy,etc[11] ̄[18]magneti
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