【作者】 胡大为； 王燕民；

【Author】 HU Dawei~1,WANG Yanmin~(1,2) (1.College of Materials Science and Engineering,South China University of Technology,510640 Guangzhou,China; 2.Key Laboratory of Specially Functional Materials under Ministry of Education,South China University of Technology,510640 Guangzhou,China)

【机构】 华南理工大学材料科学与工程学院； 华南理工大学教育部特殊功能材料重点实验室；

【摘要】 本文采用弱磁场诱导氧化共沉淀法合成纳米Fe₃O₄粒子,并对比了未加和施加弱磁场（<110 Gs）的合成过程经X-射线衍射（XRD）分析表明,在合成过程中施加外磁场可加速诱导FeO（OH）)向Fe₃O₄相变.研究还发现,施加的外磁场对合成Fe₃O₄纳米粒子的结晶度、颗粒尺寸/形貌以及磁性能均有影响.另外,在合成中使用的FeCl₂浓度大小影响了合成Fe₃O₄粒子的颗粒粒度和磁性能.更多还原

【Abstract】 This paper presents the experimental results on weakly magnetic field-assisted synthesis of magnetite（Fe₃O₄） nanoparticles in an oxidative-coprecipitation method.The synthesis processes with and without a low magnetic induction were compared.The XRD results show that the application of a weakly magnetic induction below 110 Gs into the synthesis caused the phase transformation from goethite（α-FeOOH） to magnetite（Fe₃O₄）.It was found that a weakly magnetic field had an effect on the crystal structure,the particle size/morphology and magnetic response of magnetite nano-particles synthesized.In addition,the concentration of FeCl₂ solution has an impact on the particle size without and with magnetic induction.更多还原