基于传统陶瓷工艺制备Sr1-xLaxFe11.6-xCoxO19样品,重点研究CaSi氧化物对Sr1-xLaxFe11.6-xCoxO19预烧料晶粒形貌及磁性能的影响.采用XRD、SEM和VSM分析样品的结构特征、微观形貌及磁特性.微观形貌分析的结果表明CaSi氧化物可以有效调控预烧料的晶粒形貌,通过优化CaSi氧化物的含量,能够得到理想的微观形貌及高的Mr/Ms.当掺杂量x=0.2时,加入0.15wt％ CaCO3和0.2wt％ SiO2的添加剂,饱和磁化强度(σs)和矫顽力(HcJ)比未加入CaSi氧化物时分别提高4.76％和6.2％,样品的MrMs在掺杂范围内均有所提高.
参考文献
| [1] | Kools F,Morel A,Gr(o)ssinger R.LaCo-substituted ferrite magnets,a new class of high-grade ceramic magnets; intrinsic and microstructural aspects.J.Magn.Magn.Mater.,2002,242-245(2):1270-1276. |
| [2] | Tenaud P,Morel A,Kools F.Recent improvement of hard ferrite permanent magnets based on La-Co substitution.J.Alloys Compd.,2004,370(1/2):331-334. |
| [3] | Gr(o)ssinger R,Tellez Blanco C,Kupferling M,et al.Magnetic properties of a new family of rare-earth substituted ferrites.Phys.B,2003,327(2/3/4):202-207. |
| [4] | Kools R.Reaction-induced grain growth impediment during sintering of strontium hexaferrite with silica addition.Solid State Ionics,1985,16(6):251-259. |
| [5] | Nishio H,Yamamoto H.Effect of important factors on temperature variation of coercivity in Sr-La-Co high-performance sintered ferrite magnets.IEEE Trans.Magn.,2011,47(10):3641-3644. |
| [6] | Nishio H,Minachi Y,Yamamoto H.Effect of factors on coercivity in Sr-La-Co sintered ferrite mangts.IEEE Trans.Magn.,2009,45(12):5281-5287. |
| [7] | Lee J W,Cho Y S,Amarakoon V R W.Improved magnetic properties and growth anisotropy of chemically modified Sr ferrites.J.Appl.Phys.,1999,85(8):5697-5698. |
| [8] | T(o)pfer J,Schwarzer S.Influence of SiO2 and CaO additions on the microstructure and magnetic properties of sintered Sr-hexaferrite.J.Eur.Ceram.Soc.,2005,25(9):1681-1688. |
| [9] | Hussain S,Maqsood A.Influence of sintering time on structural,magnetic and electrical properties of Si-Ca added Sr-hexa ferrites.J.Magn.Magn.Mater,2007,316(1):73-80. |
| [10] | Kools F,Morel A,Tenaud P.La-Co Substituted Sr and Ba M-type Ferrites Magnet Properties vs Intrinsic and Microstructural Factors.Proceeding of The Eighth International Conference on Ferrites(ICF 8),Kyoto and Tokyo,Japan,2000:437-439. |
| [11] | Haneda K,Kojima H.Intrinsic coercivity of substituted BaFe12O19.Jpn.J.Appl.Phys.,1973,12(3):355-360. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%