文献类型：期刊文献

中文题名：纳米Fe_3O_4及钴离子掺杂Fe_3O_4:有机碱共沉淀制备和磁性质

英文题名：Nano-Fe_3O_4 and Co^(2+) Doped Nano-Fe_3O_4: Synthesis with Coprecipitation Using TMAH and Magnetic Properties

作者：杨宇翔[1];张莉苹[1];梁晓娟[2];魏静[1];郇伟伟[1];贾祥臣[1];刘向农[3]

机构：[1]华东理工大学化学与分子工程学院,上海200237;[2]大连海事大学,大连116021;[3]扬州大学测试中心,扬州225009

年份：2010

卷号：26

期号：4

起止页码：668

中文期刊名：无机化学学报

外文期刊名：Chinese Journal of Inorganic Chemistry

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金(No.20971043和No.20577010);吉林大学无机合成与制备化学国家重点实验室资助项目

语种：中文

中文关键词：纳米Fe3O4;Co2+掺杂;共沉淀;磁性质;高矫顽力

外文关键词：Fe3O4 nanopartices; Co^2＋ doped; Co-precipitation; magnetic properties; high coercivity

摘要：以有机碱四甲基氢氧化铵(TMAH)为沉淀剂合成了纳米Fe3O4和Co2+掺杂的纳米Fe3O4粒子。分别讨论了碱用量,铁盐溶液浓度,反应温度,有机碱及PEG-4000的分散性等因素对纳米Fe3O4的形貌影响。结果表明,所合成的纳米Fe3O4为30nm左右的反尖晶石型面心立方结构,有机碱除了起沉淀剂作用,还能够提高纳米Fe3O4的分散性。本文还讨论了不同Co2+掺入量的纳米Fe3O4粒子的磁性质,结果表明Co2+掺杂的纳米Fe3O4粒子的矫顽力在不同掺入量的下有较大的改变。当Co2+掺入量为10.0%时,纳米Fe3O4的矫顽力达到最大值,为1628Oe。
Fe3O4 nanoparticles and Co^2＋ doped Fe3O4 nanoparticles were synthesized by co-precipitation method using tetramethylammonium hydroxide（TMAH） as precipitant. The influence factors such as alkali concentration, iron salt solution concentration, reaction temperature and dispersant agents were studied on the morphorogies of Fe3O4 nanoparticles. The synthesized Fe3O4 nanoparticles are cubic spinel Fe3O4 crystal with an average diameter of 30 nm. The results also show that the addition of the dispersant agent （PEG-4000） can improve the dispersibility of nanoparticles. The magnetic properties of Fe3O4 nanoparticles doped with different amount of Co^2＋ were also studied. The results indicate that the coercivity for Co^2＋ doped nanoparticles is greatly improved. The coercivity of Co^2＋ doped Fe3O4nanoparticles reaches to the maximum of 1 628 Oe when the Co^2＋ doping is 10%.