采用溶胶-凝胶方法制备了纳米复合永磁材料SrFe12O19/α-Fe2O3.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/α-Fe2O3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1.33T、358.1kAm-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/α-Fe2O3粒子间产生了硬磁相和软磁相之间的交换耦合.
参考文献
| [1] | Kojima H;Wohlfarth E P.Ferromagnetic Materials:A Handbook of the Properties of Magnetically Ordered Substances[M].North-Holland:Amsterdam,1982:305. |
| [2] | Ivan P. Parkin;Gareth Elwin;Maxim V. Kuznetsov .Self-propagating high temperature synthesis of MFe_(12)O_(19) (M= Sr,Ba) from the reactions of metal superoxides and iron metal[J].Journal of Materials Processing Technology,2001(2):239-243. |
| [3] | Kneller E F;Hawig R .One-dimensional exchange coupling model[J].IEEE Transactions on Magnetics,1991,27:3588. |
| [4] | Skomski R;Coey J M D .Giant energy product in nanostructured two-phased magnets[J].Physical Review B,1993,48(21):1581. |
| [5] | 高汝伟,代由勇,陈伟,章亚明,张茂才,乔纬,王佐诚,李卫,李岫梅,王玉山,罗军,Luo Jun.纳米晶复合永磁材料的交换耦合相互作用和磁性能[J].物理学进展,2001(02):131-156. |
| [6] | Yang Choong Jin;Eon Byung Park .The effect of heat treatment on enhanced exchange coupling of Nd2Fe14 B/Fe3 B magnet[J].IEEE Transactions on Magnetics,2003,32(05):4428-4430. |
| [7] | 车如心,高宏,赵宏滨,曹魁.纳米永磁材料FeSmO3的制备及磁性研究[J].材料热处理学报,2005(04):22-24. |
| [8] | 郭睿倩,李洪桂,孙培梅,李运姣,赵中伟.不同稀土元素掺杂M型钡铁氧体超微粉末的磁性研究[J].功能材料,2001(06):598-599,605. |
| [9] | GAO Y;ZHANG S;LIU B .Heat treatment technology to the influence of pure iron magnetism ability[J].Journal of Magnetism and Magnetic Materials,2000,208:158. |
| [10] | Fischer R;Schrefl T;Kronmuller H;Fidler J .Grain size dependence of remanence and coercive field of isotropic nanocrystallinecomposite permanent magnets[J].Journal of Magnetism and Magnetic Materials,1996,153:35-49. |
| [11] | 刘先松,钟伟,杨森,姜洪英,顾本喜,都有为.纳米晶复合永磁铁氧体的双相交换耦合作用[J].淮阴师范学院学报(自然科学版),2002(01):57-61. |
| [12] | Puneet Sharma;Amitabh Verma;R. K. Sidhu .Influence of Nd~(3+) and Sm~(3+) substitution on the magnetic properties of strontium ferrite sintered magnets[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2003(1/2):257-264. |
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