南京工业大学学报（自然科学版）2011，Vol.33Issue(1)：63-67,5.DOI:10.3969/j.issn.1671-7627.2011.01.013
超临界法制备多孔纳米Fe3O4/SiO2复合磁性微球及性能
Preparation and property of nano-porous Fe3O4/SiO2 composited magnetic microspheres by supercritical technique
摘要
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 encapsulation, the properties, and the dispersion of the proportion of Fe3 O4/SiO2 were good. And the particle size and the saturation magnetization were 30 nm and 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Key words
nano Fe3O4/SiO2/ composited aerogel nanoparticle/ supercritical drying/ magnetic microspheres分类
化学工程引用本文复制引用
伊希斌,沈晓冬,崔升,李永梅..超临界法制备多孔纳米Fe3O4/SiO2复合磁性微球及性能[J].南京工业大学学报（自然科学版）,2011,33(1):63-67,5.基金项目
国家自然科学基金资助项目(10976013) （10976013）
江苏省自然科学基金资助项目(BK2010082) （BK2010082）
江苏省普通高校研究生科研创新计划项目(CX10B_160Z) （CX10B_160Z）
