通过传统的陶瓷化工艺来制备La、Co、Zn复合取代的锶铁氧体,重点研究Zn~(2+)对锶铁氧体结构及磁性能的影响.采用X射线衍射对锶铁氧体结构进行了分析.结果表明:随着Zn~(2+)的增加,锶铁氧体主体仍为六角晶结构,晶格常数a逐渐增大,而晶格常数c先增大后减小.扫描电镜(SEM)分析显示,铁氧体晶粒主要呈片状,大多为规则的六边形.随着Zn~(2+)的增加,晶粒的尺寸逐渐增大.磁性能测量显示:当取代量x=0.15时,样品的Br和Hcj分别为436 mT、343 kA/m,这说明添加适量的Zn~(2+)会有效的降低反平行离子磁矩,提高饱和磁化强度, 进而改善锶铁氧体的磁性能.
Strontium ferrites with La, Co and Zn substitution were prepared by conventional ceramic method, and the influence of Zn~(2+)on the structure and magnetic properties of hexagonal strontium ferrites had been investigated. The XRD results show that ferrites remain a hexagonal structure with the content of Zn~(2+)increasing, lattice parameter a was gradual increased and c first increased,then decreased with x increasing. SEM results show the grains represented an orderly plate, many of them even were hexagonal shape. The sizes of grains were gradual increased with the increasing content of Zn~(2+). By magnetic properties measurement, Br and Hcj both were 436 mT, 343 kA/m when x=0.15. It demonstrates the antiparallel magnetic moments can be effective decreased and saturation magnetization is increased, so the magnetic properties have been improved.
参考文献
| [1] | Lechevallier L;Le J M;Breton et al.Structural and Magnetic Properties of Sr_(1-x)Sm_xFe_(12)O_(19) Hxagonal Ferrites Synthesized by a Ceramic Process[J].Journal of Alloys and Compounds,2003,359:310-314. |
| [2] | Choi D H;Lee S W;Shim I B et al.Mossbauer Studies for La-Co Substituted Strontium Ferrite[J].Journal of Magnetism and Magnetic Materials,2006,304:243-245. |
| [3] | K. Kakizaki;H. Taguchi;N. Hiratsuka .Magnetic properties of La-Co substituted barium ferrite thin films with large magnetic anisotropy[J].Journal of Magnetism and Magnetic Materials,2004(3):2241-2243. |
| [4] | Corral-Huacuz JC.;Mendoza-Suarez G. .Preparation and magnetic properties of Ir-Co and La-Zn substituted barium ferrite powders obtained by sol-gel[J].Journal of Magnetism and Magnetic Materials,2002(1):430-433. |
| [5] | C.K. Ong;H.C. Fang;Z. Yang .Magnetic relaxation in Zn-Sn-doped barium ferrite nanoparticles for recording[J].Journal of Magnetism and Magnetic Materials,2000(3):413-417. |
| [6] | Sugg B.;Vincent H. .MAGNETIC PROPERTIES OF NEW M-TYPE HEXAFERRITES BAFE12-2XIRXCOXO19[J].Journal of Magnetism and Magnetic Materials,1995(3):364-370. |
| [7] | Lechevallier L;Le Breton JM;Wang JF;Harris IR .Structural and Mossbauer analyses of ultrafine Sr1-xLaxFe12-xZnxO19 and Sr1-xLaxFe12-xCoxO19 hexagonal ferrites synthesized by chemical co-precipitation[J].Journal of Physics. Condensed Matter,2004(29):5359-5376. |
| [8] | Sang L W;Yong A S .Mossbauer Studies of La-Zn Substitution Effect in Strontium Ferrite Nanopartieles[J].Journal of Magnetism and Magnetic Materials,2005,290:231-233. |
| [9] | Liang Qiao;Lishun You;Jingwu Zheng;Liqiang Jiang;Jiawei Sheng .The magnetic properties of strontium hexaferrites with La–Cu substitution prepared by SHS method[J].Journal of Magnetism and Magnetic Materials,2007(0):74-78. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%