以硝酸钡、硝酸铁和柠檬酸为原料,采用溶胶-凝胶法制备了单相钡铁氧体( BaFe12O19)纳米粉体,并进一步研究了n(Fe) /n(Ba)、热处理温度对产物组成、形貌以及磁性能的影响.用X射线衍射仪(XRD)、扫描电子显微镜( SEM)和振动样品磁强计(VSM)分别对样品的组成、形貌和磁性能进行了表征.实验结果表明,当煅烧温度不变时,样品的晶粒尺寸随着n(Fe) /n(Ba)的增大而变大,磁性能随n(Fe) /n(Ba)的增大而增强；当n(Fe) /n(Ba)不变时,样品的晶粒尺寸随着煅烧温度的升高而变大.当n(Fe)/n(Ba)=12时,在800℃煅烧2h得到单一晶型的钡铁氧体粉体.1000℃时样品的磁性能最佳,饱和磁化强度(Ms)为70.88A·m2/kg,矫顽力(Hc)为372.89kA/m.
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