以柠檬酸和金属盐为原料.采用有机凝胶-热分解法成功制备出了具有中空结构的Mn0.4-xMgxZn0.6Fe2O4(x=0.0,0.2)铁氧体纤维.通过 XRD、SEM和VSM对目标纤维进行了表征,并初步研究了纤维中空结构的形成机制以及Mg2+掺杂对Mn-Zn铁氧体纤维的结构、微观形貌和磁性能的影响.结果表明,所得纤维样品都为单一的立方尖晶石结构,直径在0.5-3 μm之间,长径比较大,纤维表面都较为光滑、致密.Mg2+掺杂改善了纤维的微观结构和磁性能,与未掺杂的Mn-Zn铁氧体相比.20 mol%Mg2+掺杂的Mn-Mg-Zn铁氧体纤维的晶格常数、晶粒尺寸、饱和磁化强度和矫顽力都有不同程度的提高.
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