| 超临界法制备多孔纳米Fe_3O_4/SiO_2复合磁性微球及性能 |
| |
| 引用本文： | 伊希斌,沈晓冬,崔升,李永梅. 超临界法制备多孔纳米Fe_3O_4/SiO_2复合磁性微球及性能[J]. 陶瓷科学与艺术, 2011, 0(1) |
| |
| 作者姓名： | 伊希斌 沈晓冬 崔升 李永梅 |
| |
| 作者单位： | 南京工业大学材料科学与工程学院材料化学工程国家重点实验室; |
| |
| 基金项目： | 国家自然科学基金资助项目(10976013); 江苏省自然科学基金资助项目(BK2010082); 江苏省普通高校研究生科研创新计划项目(CX10B_160Z) |
| |
| 摘 要： | 为了制备具有纳米多孔结构的磁性复合微球,采用正硅酸四乙酯(TEOS)和金属氯盐分别作为SiO2和铁氧体的前驱体,通过溶胶凝胶法制备将Fe3O4纳米颗粒分散于SiO2基体中的Fe3O4/SiO2磁性纳米复合微球,并用超临界干燥法对其进行干燥。利用X线衍射(XRD)、红外光谱(IR)、透射电镜(TEM)和振动试样磁场计(VSM)等分析测试手段对合成的材料进行性能表征。结果表明:复合粒子包覆完好、性能优良、分散性良好,制备颗粒的粒径为30 nm,比饱和磁化强度为84.09 A.m2/kg。
|
| 关 键 词： | 纳米Fe3O4/SiO2 复合气凝胶颗粒 超临界干燥 磁性微球 |
Preparation and property of nano-porous Fe_3O_4/SiO_2 composited magnetic microspheres by supercritical technique |
| |
| YI Xibin,SHEN Xiaodong,CUI Sheng,LI Yongmei. Preparation and property of nano-porous Fe_3O_4/SiO_2 composited magnetic microspheres by supercritical technique[J]. Ceramics Science & Art, 2011, 0(1) |
| |
| Authors: | YI Xibin SHEN Xiaodong CUI Sheng LI Yongmei |
| |
| Affiliation: | YI Xibin,SHEN Xiaodong,CUI Sheng,LI Yongmei(State Key Laboratory of Materials-Oriented Chemical Engineering,College of Material Science and Technology,Nanjing University of Technology,Nanjing 210009,China) |
| |
| Abstract: | In order to prepare the nano-porous composited magnetic microspheres,nanocomposites with ferrite nanoparticles uniformly dispersed in silica matrix were synthesized by using tetraethylorthosilicate(TEOS) as a precursor of silica and metallic chloride as precursors of ferrite,and dried by supercritical drying.The obtained samples were investigated by X-ray diffraction(XRD),infrared spectroscopy(IR),transmission electron microscopy(TEM),and vibration sample magnetometer(VSM).Results showed that the encapsulat... |
| |
| Keywords: | nanoFe3O4/SiO2 composited aerogel nanoparticle supercritical drying magnetic microspheres |
| 本文献已被 CNKI 等数据库收录！ |
