Preparation of ferromagnetic metal fine fibers by organic gel-thermal reduction process  

作　　者：曹凯 沈湘黔 景茂祥 周建新 

机构地区：[1]School of Materials Science and Engineering, Jiangsu University

出　　处：《Journal of Central South University of Technology》2007年第5期607-611,共5页中南工业大学学报（英文版）

基　　金：Projects(50474038; 50674048) supported by the National Natural Science Foundation of China

摘　　要：The organic gel-thermal reduction process was used for the preparation of ferromagnetic metal Ni, Co and Fe fine fibers from the raw materials of citric acid, lactic acid and metal salts. The structure, thermal decomposition process and morphologies of the gel precursors and fibers derived from thermal reduction of these gel precursors were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, thermo-gravimetric/differential scanning calorimetry and scanning electron microscopy. The results show that spinnability of gel largely depends on molecular structure of metal-carboxylate complex that is a linear-type structure formed in the gel. As a result, the gels exhibit a good spinnability. Metal Ni, Co and Fe fine fibers are featured with diameters of around 1 μm and a high aspect ratio up to 1×106.The organic gel-thermal reduction process was used for the preparation of ferromagnetic metal Ni, Co and Fe fine fibers from the raw materials of citric acid, lactic acid and metal salts. The structure, thermal decomposition process and morphologies of the gel precursors and fibers derived from thermal reduction of these gel precursors were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, thermo-gravimetric/differential scanning calorimetry and scanning electron microscopy. The results show that spinnability of gel largely depends on molecular structure of metal-carboxylate complex that is a linear-type structure formed in the gel. As a result, the gels exhibit a good spinnability. Metal Ni, Co and Fe fine fibers are featured with diameters of around 1 μm and a high aspect ratio up to 1 × 10^6.

关 键 词：ferromagnetic metal fiber organic gel thermal reduction SPINNABILITY 

分 类 号：TN253[电子电信—物理电子学]