| 纳米Fe3O4及钴离子掺杂Fe3O4：有机碱共沉淀制备和磁性质 |
| Nano-Fe3O4 and Co2+ Doped Nano-Fe3O4: Synthesis with Coprecipitation Using TMAH and Magnetic Properties |
|
| 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30 nm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1 628 Oe。 |
| 关键词: 纳米Fe3O4 Co2+掺杂 共沉淀 磁性质 高矫顽力 |
| 基金项目: |
| Abstract: Fe3O4 nanoparticles and Co2+ 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 Co2+ were also studied. The results indicate that the coercivity for Co2+ doped nanoparticles is greatly improved. The coercivity of Co2+ doped Fe3O4 nanoparticles reaches to the maximum of 1 628 Oe when the Co2+ doping is 10%. |
| Keywords: Fe3O4 nanopartices Co2+ doped Co-precipitation magnetic properties high coercivity |
| |
| 摘要点击次数: 1697 |
| 全文下载次数: 2327 |
| 杨宇翔,张莉苹,梁晓娟,魏 静,郇伟伟,贾祥臣,刘向农.纳米Fe3O4及钴离子掺杂Fe3O4：有机碱共沉淀制备和磁性质[J].无机化学学报,2010,26(4):668-676. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
