车如心,高宏

• 1:大连交通大学环境科学与工程学院
• 2:大连交通大学材料科学与工程学院 辽宁大连116028
• 3:辽宁大连116028

摘要(Abstract)：

采用溶胶-凝胶方法制备了纳米复合永磁材料SrFe12O19/-αFe2O3。利用差重分析(DTG)、X射线衍射(XRD)、扫描电镜(SEM)与振动样品磁强计(VSM)探讨了热处理条件对磁性材料制备及其组织结构、磁性能的影响。结果表明,不同的热处理工艺导致相变过程不同,直火煅烧有利于纳米复合永磁材料SrFe12O19/-αFe2O3制备。直火煅烧650℃,纳米复合样品的剩磁、内禀矫顽力和最大磁能积分别为1.33T3、58.1kAm-1和134.8kJm-3,其剩磁和最大磁能积比分段煅烧样品有了较大提高,证明SrFe12O19/-αFe2O3粒子间产生了硬磁相和软磁相之间的交换耦合。

关键词(KeyWords)： 热处理;溶胶-凝胶;纳米复合永磁材料;磁性;组织结构

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基金项目(Foundation): 大连市计划项目(20021302)

作者(Author): 车如心,高宏

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