| 形貌可控纳米SrFe12O19的溶胶-凝胶法制备及磁性能研究 |
| Nano-SrFe12O19 Particles with Controlled-morphology: Preparation by Sol-gel Method and Magnetic Properties |
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| 摘要: 采用柠檬酸法，在加入柠檬酸的同时加入少量有机模板剂(EDTA、熔融的硬脂酸和草酸)作为分散剂，与柠檬酸络合物上多余的羟基形成氢键，使前驱体定向生长，制得了针状、棒状以及纺锤状纳米SrFe12O19粉体，与不加有机模板剂时制得的球状相比，形貌发生极大的变化的。利用XRD﹑IR和TEM等测试手段对煅烧后的纳米SrFe12O19进行表征，并利用VSM对磁性能进行研究，结果表明各向异性越大，矫顽力越大。同时对有机模板剂对形貌的影响机理进行了初步的探究。 |
| 关键词: 有机模板剂 形貌可控 纳米SrFe12O19 磁性 |
| 基金项目: |
| Abstract: Citric acid method was used to prepare nano-SrFe12O19 powders, acicular, clavate and spindle nano-SrFe12O19 particles were prepared through adding a small amount of different organic template agents (EDTA, melting stearic acid and tartaric acid) as dispersants in the process of the citric acid addition, because the template agent can form hydrogen bond with the excess hydroxyl of citric acid complex, and the precursor can grow directionally, compared with the former spherical nano-SrFe12O19 without organic template agent. The morphologies of nano-SrFe12O19 were characterized by TEM﹑IR and XRD, and vibrating sample magnetometer (VSM). The coercivity was increased with the increase in the anisotropy. Mechanism of influence of organic template agents on the morphology of nano-SrFe12O19 is also preliminarily studied in this work. |
| Keywords: organic template agent morphology-controlled nano-SrFe12O19 Magnetic properties |
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| 王永飞,李巧玲,张存瑞,景红霞.形貌可控纳米SrFe12O19的溶胶-凝胶法制备及磁性能研究[J].无机化学学报,2007,23(11):1983-1987. |
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