| La-Co取代钙铁氧体制备及优越性 |
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| 引用本文： | 刘辉,李炳山,张威锋,全小康,魏汉中,王常蕾,王倩.La-Co取代钙铁氧体制备及优越性[J].磁性材料及器件,2018(4):27-30. |
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| 作者姓名： | 刘辉 李炳山 张威锋 全小康 魏汉中 王常蕾 王倩 |
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| 作者单位： | 北矿磁材科技有限公司,北京,100070 |
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| 摘 要： | 采用陶瓷法,使用La、Co分别取代部分Ca和Fe,制成以分子式Ca_(1-x-x')LaxSr_(x')Fe_(2n-y)Co_yO_(19)(x,x',y和n分别满足关系式:0.2≤x≤0.7,0≤x'≤0.3,0≤y≤0.5和4.5≤n≤6.0)为主相的六方晶系铁氧体。采用该铁氧体制备的磁体其Br/G+1/3H_(cj)/Oe在6200以上。磁性能为:剩磁B_r=449 m T,矫顽力H_(cb)=339 k A/m,内禀矫顽力H_(cj)=424 k A/m,最大磁能积(BH)max=39.2 k J/m~3。相比La-Co取代各向异性锶铁氧体,La-Co取代各向异性钙铁氧体在磁性能上表现出明显的优越性。
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| 关 键 词： | 永磁铁氧体 La-Co取代 Ca铁氧体 磁性能 permanent ferrite La-Co substitution Ca ferrite magnetic property |
Preparation and advantage of La-Co substituted calcium ferrite |
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| LIU Hui,LI Bing-shan,ZHANG Wei-feng,QUAN Xiao-kang,WEI Han-zhong,WANG Chang-lei,WANG Qian.Preparation and advantage of La-Co substituted calcium ferrite[J].Journal of Magnetic Materials and Devices,2018(4):27-30. |
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| Authors: | LIU Hui LI Bing-shan ZHANG Wei-feng QUAN Xiao-kang WEI Han-zhong WANG Chang-lei WANG Qian |
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| Abstract: | Calcium ferrite Ca1-x-x'LaxSr x'Fe2n-yCoyO19was prepared by ceramic process and partly substituting Ca and Fe with La-Co. The main phase of the substituted calcium ferrite is hexagonal structure. The magnetic properties of the magnet have reached: remanence Br=449 mT, coercivity Hcb=339kA/m, intrinsic coercivity Hcj=424 kA/m, and (BH)max=39.2 kJ/m3. The La-Co substituted calcium ferrite exhibits performance advantage. |
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