固相烧结法制备的Co_3O_4和Fe_2O_3磁性纳米颗粒  

Co_3O_4 and Fe_2O_3 magnetic nanoparticles synthesized by solid state sintering

作　　者：刘艳华 边宝茹[2] 杜娟 李瑛[1] 张真荣[2] 

机构地区：[1]上海大学材料科学与工程学院材料研究所,上海200072 [2]中国科学院宁波材料所中科院磁性材料与器件重点实验室,浙江宁波315201

出　　处：《磁性材料及器件》2017年第6期5-8,52,共5页Journal of Magnetic Materials and Devices

基　　金：国家自然科学基金资助项目951422106);浙江省自然科学基金资助项目(2013TD08)

摘　　要：采用一种纳米颗粒的新型制备方法,即固相烧结方法,成功制备出单分散的Co_3O_4和Fe_2O_3磁性纳米颗粒。利用金属前驱体粉末混合在NaCl介质中高温下分解金属原子在NaCl颗粒上聚集长大,在空气中烧结氧化形成纳米颗粒。NaCl介质既作为纳米粒子成核和长大的基底,又作为隔离介质防止纳米颗粒在高温加热过程中出现烧结团聚现象。在制备过程中除了金属前驱体和NaCl,没有其他试剂使用。通过XRD、TEM、VSM等对制备出的Co_3O_4和Fe_2O_3纳米颗粒进行了物相结构和成分、微观形貌及磁性能的表征。结果表明,制备出的Co_3O_4和Fe_2O_3纳米颗粒颗粒尺寸小,结晶性好,且尺寸分布均匀。Monodisperse Co3O4 and Fe2O3 nanoparticles were successfully prepared using a new synthesis method for nanoparticles, solid phase sintering method. Metal precursor powder was mixed in NaCl medium and decomposed to metal atoms at high temperature, and then the obtained metal atoms nucleate and grow on NaCl substrate, and sintered and oxidized to form required nanoparticles in air. NaCl media is used both as substrate for nanoparticles nucleation and growth, and insulation media preventing nanoparticles form aggregation during high temperature. In addition to metal precursors and NaCl, no other reagents were used in the preparation process. The crystal structure, particle size, morphology and magnetism of Co3O4 and Fe2O3 nanoparticles were characterized by XRD, TEM and VSM, respectively. The results indicate that the prepared Co3O4 and Fe2O3 nanoparticles have a small particle size, good crystallinity and uniform size distribution.

关 键 词：Co3O4纳米颗粒 Fe2O3纳米颗粒 固相烧结法 NACL介质 磁性能 

分 类 号：TM27[一般工业技术—材料科学与工程] TB383[电气工程—电工理论与新技术]