摘要
纳米双相复合磁体是永磁材料研究的热门领域,具有L10结构的FePt凭借高的磁晶各向异性、稳定的化学性质、高的矫顽力,成为纳米双相复合中硬磁相的首选。将Fe、Pt的无机金属盐作为前驱体与NaCl进行球磨混合,在还原性气氛环境中进行不同温度的热分解处理,制备分散性较好、颗粒尺寸分布均匀的单相L10-FePt,然后通过热分解软磁相Co的前驱体CoCl2·6H2O,使其均匀包覆在FePt纳米颗粒上,制备出磁性能优良的FePt/Co纳米复合颗粒。振动样品磁强计Lake shore 7410测试表明样品具有优良的磁性能,通过X射线粉末衍射证明成分为FePt、Co,通过透射电镜对样品的形貌进行观测,证明FePt/Co双相复合结构形成。
Nanocomposite material is an interesting topic for permanent magnetic materials.FePt nanoparticles,with L10-ordered structure,serve as the leading candidate for hard magnetic phase in the permanent magnetic nanocomposites,because of its large magnetocrystalline anisotropy,chemical stability and high coercivity.In this paper,L10-FePt nanocomposites,with good disperse and uniformed size,were obtained by ball milling the mixture of precursors（Fe and Pt）and NaCl,followed by heat-treatment at different temperatures under a reductive atmosphere flow.These nanoparticles were coated uniformly by soft magnetic phase derived from the thermal decomposition of soft magnetic phase cobalt source precursor CoCl_2·6H_2O,then obtained the high-performance permanent magnetic FePt/Co nanocomposites.Vibrating sample magnetometer measurements reveal the high performance FePt/Co nanocomposites,while X-ray diffraction ones indicate the existence of Co phase. Transmission electron microscopy confirms that the FePt/Co nanocomposites have been prepared successfully.
出处
《沈阳师范大学学报（自然科学版）》
CAS
2017年第1期19-22,共4页
Journal of Shenyang Normal University:Natural Science Edition
基金
国家自然科学基金青年科学基金资助项目(51401228)
