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| 有机凝胶先驱体转化法制备尖晶石型铁氧体MnFe_2O_4纤维 | |
| 引用本文： | 朱永伟,向军,沈湘黔,林魁.有机凝胶先驱体转化法制备尖晶石型铁氧体MnFe_2O_4纤维[J].南京航空航天大学学报,2009,41(2). |
| 作者姓名： | 朱永伟 向军 沈湘黔 林魁 |
| 作者单位： | 1. 南京航空航天大学机电学院,南京,210016 2. 江苏大学材料科学与工程学院,镇江,212013;江苏科技大学数理学院,镇江,212003 3. 江苏大学材料科学与工程学院,镇江,212013 |
| 基金项目： | 国家自然科学基金，航空科学基金 |
| 摘 要： | 以柠檬酸和金属盐为原料,采用有机凝胶先驱体转化法成功制备出了纳米晶MnFe2O4铁氧体纤维.通过FTIR,TG-DTA,XRD,SEM和振动样品磁强计(VSM)对纤维前驱体凝胶的结构、热分解过程及热处理产物的物相、形貌以及纤维的磁性能等进行了表征.结果表明,当柠檬酸与金属粒子的摩尔比CA:Fe3+:Co2+=4;2:1和pH值等于4.5时形成的凝胶具有良好的可纺性,在凝胶形成过程中金属离子可能以单齿形式配位于柠檬酸根阴离子,形成了线型分子结构.所制得的纤维表面光滑、致密,纤维直径在1～20μm,长径比较大.600℃焙烧2 h后得到的Mn铁氧体纤维的晶粒粒径在12 am左右.随机分布的MnFe2O8铁氧体纤维在常温下的比饱和磁化强度为6.59 A·m2·kg-1,矫顽力为4.3 kA·m-1. |
| 关 键 词： | MnFe2O4铁氧体纤维 有机凝胶先驱体转化法 可纺性 磁性能 |
Preparation of Spinel Ferrite MnFe_2O_4 Fibers by Organic Gel-Polymer Derived Process |
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| Zhu Yongwei,Xiang jun,Shen Xiangqian,Lin kui.Preparation of Spinel Ferrite MnFe_2O_4 Fibers by Organic Gel-Polymer Derived Process[J].Journal of Nanjing University of Aeronautics & Astronautics,2009,41(2). | |
| Authors: | Zhu Yongwei Xiang jun Shen Xiangqian Lin kui |
| Institution: | 1.College of Mechanical and Electrical Engineering;Nanjing University of Aeronautics & Astronautics;Nanjing;210016;China;2.School of Material Science and Engineering;Jiangsu University;Zhenjiang;212013;3.School of Mathematics and Physics;Jiangsu University of Science and Technology;212003;China |
| Abstract: | The spinel type MnFe2O4ferrite fibers are successfully prepared by the organic gel-polymer derived process from raw materials of metal salts and citric acid.The structure,morphology and thermal decomposition process of the gel precursors,and the fibers derived from thermal decomposition of these precursors are characterized by FTIR,thermogravimetric-differential thermal analysis(TG-DSC),X-ray diffraction(XRD),and scanning electron microscope(SEM).The electromagnetic performances of ferrite fibers are measur... |
| Keywords: | MnFe2O4ferrite fibers organic gel-polymer derived process spinnability magnetic properties |
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