有机凝胶-热还原法制备FeNiCu三元合金微细纤维  

Preparation of FeNiCu Alloy Fine Fibers by the Organic Gel-Thermal Reduction Process

作　　者：曹凯[1] 沈湘黔[1] 景茂祥[1] 周建新[1] 

机构地区：[1]江苏大学,江苏镇江212013

出　　处：《稀有金属材料与工程》2007年第12期2199-2203,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50474038;50674048)

摘　　要：以柠檬酸和金属盐为原料,采用有机凝胶-热还原法制备了FeNiCu合金微细纤维。通过FTIR,XRD,TG/DSC,SEM和VSM对纤维先躯体凝胶的结构、物相组成、热分解过程、热处理后产物的形貌及磁性能进行了表征。结果表明,在凝胶形成过程中,金属离子可单齿配位于柠檬酸根阴离子,并形成线性分子结构,使凝胶有较好的可纺性;先驱体纤维经氢气和氮气气氛下800℃还原1h后形成了晶粒细小、直径可以小于1μm、长度可达0.5m的均匀Fe0.33Ni0.33Cu0.33合金微细纤维,其饱和磁化强度为82.17A·m2/kg,矫顽力为6.67kA/m。FeNiCu alloy fine fibers were successfully prepared by the organic gel-thermal reduction process using critic acid and metal salts as raw materials. The structure composition, thermal decomposition process, morphologies and magnetic property of the products after heat treatment were characterized by FTIR, XRD, TG/DSC, SEM, VSM. The results show that the gel spinnability mainly depends on molecular structures of the metal-carboxylates formed during the gel formation. The gel consisted of linear-type structural molecules. The fibrous gel precursors were transferred into the Feo.33Nio.33Cuo.33 alloy fibers after the thermal reduction process at 800 ℃ in H2＋N2 atmosphere for 1 h, these fibers with up to 1 m in length, 1 μm in diameter had smooth appearance and superfine crystalline size, their saturated magnetization and the coercivity were 82.17 A·m^2/kg and 6.67 kA/m, respectively.

关 键 词：FeNiCu合金纤维 有机凝胶-热还原法 热还原 磁性能 

分 类 号：TQ343.2[化学工程—化纤工业]