Optimization of sol–gel synthesis of CoFe2O4 nanowires using template assisted vacuum suction method
Optimization of sol–gel synthesis of CoFe2O4 nanowires using template assisted vacuum suction method
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DOI：
10.1016/j.jmmm.2014.06.058
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发表时间：
2014-12
影响因子：
2.7
通讯作者：
A. Pirouzfar;S. Ebrahimi
中科院分区：
文献类型：
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作者：
A. Pirouzfar;S. Ebrahimi
本研究利用溶胶-凝胶法，以阳极氧化铝为模板，通过机械真空吸附法合成了钴铁氧体纳米线。对煅烧温度和pH值等工艺参数进行了优化。在600 °C下获得单相钴铁氧体。结果表明，pH=1时，凝胶发生自燃，纳米线出现裂纹，有利于纳米线的均匀生长。此外，纳米线在平行于纳米线轴的方向上显示出更高的介电常数（Hc =1050 Oe），而不是在垂直方向上（Hc =772 Oe）。
In this study, cobalt ferrite nanowires were synthesized by a sol–gel route using anodized aluminum oxide (AAO) template by applying mechanical vacuum suction. The parameters of calcination temperature and pH value were optimized subsequently. The single phase cobalt ferrite was obtained at 600 °C. The results showed that pH=1 is appropriate for synthesis of uniform nanowires because at the higher pH values the autocombustion of the gel, with making cracks in nanowires, will be happened. Furthermore, the nanowires showed higher coercivity in the direction parallel to the axis of the nanowires (Hc║=1050 Oe) rather than that in the perpendicular direction (Hc⊥=772 Oe).