采用高温自蔓延(SHS)方法制备了化学组成为Sr1-xLaxFe12-xZnxO19(x=0～0.4)的La-Zn联合掺杂的锶铁氧体,并研究了晶体结构与离子掺杂量对铁氧体磁性能的影响.根据相关的热力学数据,分析了合成过程中产生不同氧化物杂质的热力学机制,结果显示,通过合适控制反应体系中的Fe粉含量,可以合成单一的M型铁氧体相.SEM表明SHS方法制备的样品比传统方法制备的样品结晶更完整,粉体颗粒呈明显的六角平板状,颗粒尺寸基本分布在0.5～1.2 μm之间.La3+,Zn2+的加入能够明显地提高试样的综合磁性能,相比于未掺杂的试样,在未取向情况下其剩磁提高了14.4%,Hcb提高了15.3%,(BH)m提高了30.7%,并且与传统制备方法相比,采用SHS方法获得的样品的内禀矫顽力Hcj提高尤为明显,最高可达322kA/m.
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