采用陶瓷工艺制备了永磁铁氧体Sr0.55-xCaxLa0.45 Fe10.85Co0.35O19(0≤x≤0.35),以X射线衍射仪(XRD)、扫描电子显微镜(SEM)对材料的物相组成和微观形貌进行了表征,以铁氧体永磁测量仪对材料的磁性能进行了检测.结果表明,钙掺杂后磁体主要由M相组成,但钙掺杂量x=0.25时磁体中出现了少量的Fe2O3相.钙掺杂后磁体的晶粒尺寸、长径比增加,当x=0.25时,a向平均晶粒尺寸(平行于试样表面方向)达到1.23μm,长径比达到2.32.随着钙掺杂量增加磁体的剩磁逐渐减小,而钙掺杂量对磁体的矫顽力影响比较复杂,当掺杂量x=0.05、0.35时磁体的矫顽力表现为减小,当掺杂量x=0.15、0.25时磁体的矫顽力明显提高.
参考文献
| [1] | 李建三;曾德长;钟喜春 等.稀土Dy掺杂SrFe12O19永磁铁氧体的结构与性能[J].功能材料,2011,42(z2):272-279. |
| [2] | Liu XS.;Zhong W.;Yang S.;Yu Z.;Gu BX.;Du YW. .Influences of La3+ substitution on the structure and magnetic properties of M-type strontium ferrites[J].Journal of Magnetism and Magnetic Materials,2002(2/3):207-214. |
| [3] | Liu, XS;Hernandez-Gomez, P;Deng, YX;Huang, K;Xu, XB;Qiu, SX;Zhou, D .Analysis of magnetic disaccommodation in La3+-Co2+-substituted strontium ferrites[J].Journal of Magnetism and Magnetic Materials,2009(16):2421-2424. |
| [4] | Fang YK;Ding BM;Pang ZY;Wang BY;Bao DX;Han SH;Han BS .Magnetic and crystalline microstructures of the Sr-La-Co M-type ferrites by magnetic force Microscopy[J].Chinese physics letters,2005(4):942-945. |
| [5] | P. Tenaud;A. Morel;F. Kools .Recent improvement of hard ferrite permanent magnets based on La-Co substitution[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2004(1/2):331-334. |
| [6] | 何震宇,许志寿,陆柏松,何军义,王洪奎.永磁铁氧体大生产技术国内与国际的差距[J].新材料产业,2007(12):53-56. |
| [7] | Shahid Hussain;A. Maqsood .Influence of sintering time on structural, magnetic and electrical properties of Si–Ca added Sr-hexa ferrites[J].Journal of Magnetism and Magnetic Materials,2007(1):73-80. |
| [8] | T(O)pfer J;Schwarzer S;Senz S et al.Influence of SiO2 and CaO additions on the microstructure and magnetic properties of sintered Sr-hexaferrite[J].Journal of the European Ceramic Society,2005,25:1681-1688. |
| [9] | 金子裕治;濱村敦 .Srアエライト烧结磁石の特性改良に開する研究[J].粉体扫よぴ粉末冶金,1992,39(11):937-947. |
| [10] | Z.H. Hua;S.Z. Li;Z.D. Han;D.H. Wang;M. Lu;W. Zhong;B.X. Gu;Y.W. Du .The effect of La-Zn substitution on the micro structure and magnetic properties of barium ferrites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1/2):326-329. |
| [11] | Wiesinger G.;Muller M.;Grossinger R.;Pieper M.;Morel A.;Kools F. Tenaud P.;Le Breton JM.;Kreisel J. .Substituted ferrites studied by nuclear methods[J].Physica Status Solidi, A. Applied Research,2002(2):499-508. |
| [12] | Morel A.;Le Breton JM.;Kreisel J.;Wiesinger G.;Kools F.;Tenaud P. .Sublattice occupation in Sr1-xLaxFe12-xCoxO19 hexagonal ferrite analyzed by Mossbauer spectrometry and Raman spectroscopy[J].Journal of Magnetism and Magnetic Materials,2002(2):1405-1407. |
| [13] | Jean-Marie Le Breton;Jacques Teillet;Gunter Wiesinger;Antoine Morel;Frans Kools;Philippe Tenaud .Mossbauer Investigation of Sr-Fe-O Hexaferrites With La-Co Addition[J].IEEE Transactions on Magnetics,2002(5):2952-2954. |
| [14] | Yanagida S;Ito N;Iburkawa Y et al.Ferrite sintered magnet[P].US:0314981,2009-12-24. |
| [15] | 朱存福,金鸣林,王占勇,刘克家,包宗宏,蒋涵涵.烧结锶铁氧体的极图分析[J].硅酸盐学报,2011(05):748-752. |
| [16] | Li, X.;Yang, W.;Bao, D.;Meng, X.;Lou, B..Influence of Ca substitution on the microstructure and magnetic properties of SrLaCo ferrite[J].Journal of Magnetism and Magnetic Materials,2013:1-5. |
| [17] | Kools F.;Morel A.;Grossinger R.;Le Breton JM.;Tenaud P. .LaCo-substituted ferrite magnets, a new class of high-grade ceramic magnets; intrinsic and microstructural aspects[J].Journal of Magnetism and Magnetic Materials,2002(2):1270-1276. |
| [18] | 小林羲德;细川誠一;尾田悦志 等.Ca-La-Co系M型アエ 7 イ トの组成と磁氟特性[J].粉体および粉末冶金(日本),2008,55(07):541-546. |
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