一步法制备L1_0相FePt纳米颗粒  

Preparation of L1_0-Structure FePt Nanoparticles by One-step Method

作　　者：杜雪岩[1] 刘广菊[1] 杨洪奎[1] 屠桂朋[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,兰州730050

出　　处：《材料导报》2012年第12期29-31,共3页Materials Reports

基　　金：甘肃省高校基本科研基金;国家自然科学基金(51061009)

摘　　要：以乙酰丙酮铁(Fe(acac)3)和氯铂酸(H2PtCl6.6H2O)分别作Fe源和Pt源,三缩四乙二醇(TEG)作溶剂和还原剂,聚乙烯基吡咯烷酮(PVP)作表面活性剂,通过多元醇还原法制备出单分散的FePt纳米颗粒。通过X射线衍射仪(XRD)及透射电子显微镜(TEM)分析表明,所制备的FePt纳米颗粒形状近似球形,分散性较好,平均颗粒粒径约为5.5nm。通过振动样品磁强计(VSM)分析显示所制备FePt纳米颗粒矫顽力为37.64kA/m,这意味着FePt纳米颗粒部分转变为面心四方相(L10相)。FePt nanoparticles were prepared by polyoPreduction method, where Fe（acac） 3, H2 PtCl6 · 6 H2 O, tetraethylene glycol（TEG） and poly（N-vinyl-2-pyrrolidone）（PVP） were used as Fe sources, Pt sources, reductant and protective polymer, respectively. The as-prepared FePt nanoparticles were characterized by X-ray powder diffraction （XRD）, transmission electron microscopy（TEM） and vibrating sample magnetometer（VSM）. The results of XRD and TEM exhibit that the FePt nanoparticles were spherical shapes with high mono-dispersibility, the average size of the FePt nanoparticles was about 5.5nm. The result of VSM show that the coercivity of FePt nanoparticles was 37.64 kA/m, which implying the FePt nanoparticles partly transformed from fcc structure into ordered L10 structure.

关 键 词：FEPT纳米颗粒 制备 表征 L10相 

分 类 号：TB383[一般工业技术—材料科学与工程]