摘要
利用溶胶-凝胶自蔓延法合成了含MWCNTs锶铁氧体前躯体,经过微波煅烧成功制备了MWCNTs/锶铁氧体纳米复合材料,主要研究了MWCNTs含量和煅烧保温时间对MWCNTs/锶铁氧体纳米复合材料结构和磁性能的影响。研究结果表明,添加4%~6%的MWCNTs,促进了SrFe12O19相的形成,有利于改善MWCNTs/锶铁氧体纳米复合材料的磁性能。相对于传统煅烧方式,微波煅烧温度低、时间短,对于MWCNTs含量为2%的样品,最佳煅烧条件为800℃/60 min,最佳磁性能为σs=61.487 emu/g,σr=32.853 emu/g,H c=3 645.6 Oe,σr/σs=0.534 3。
MWCNTs/ SrFe12 O19 nanocomposite ferrites were prepared by microwave-assisted sol-gel self-propagating methods. This work focused on the content of MWCNTs and the microwave calcining time. The results showed that the high purity SrFe12 O19 nanocrystallites were formed for the samples with4% ~6% MWCNTs,as well as the improvement of magnetic properties. According to traditional calcination,microwave calcination was beneficial to the low calcination temperature and short calcination time. The optimum magnetic properties with σs =61.487 emu / g,σr =32. 853 emu / g,H c =3645.6 Oe,σr / σs = 0.5343 were obtained for the samples with2% MWCNTs calcined at 800 ℃ for60 mins.
出处
《材料保护》
CAS
CSCD
北大核心
2013年第S2期106-108,共3页
Materials Protection
基金
上海市教育委员会科研创新项目(14ZZ165)资助
