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采用sol-gel方法制备M型六角锶铁氧体.利用X射线衍射,透射电子显微镜和VSM对纳米晶样品进行了研究.当焙烧温度小于或等于800℃,样品存在复相.在同样条件下,压成薄片的样品呈现了硬磁与软磁SrFe12O19/γ-Fe2O3的纳米复合相的磁性交换耦合作用.800℃焙烧的薄片样品的比饱和磁化强度σS为75.6A*m2/kg,内禀矫顽力HcJ为478.9kA/m,最大磁能积(BH)max为14.9kJ/m3,而粉末样品相应的分别为75.9 A*m2/kg,509.6 kA/m和12.1 kJ/m3.当焙烧温度大于850℃时,只有单一M相. 相似文献
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Chemical Synthesis of Highly Magnetic, Air-Stable Silica-Coated iron Particles 总被引:3,自引:0,他引:3 下载免费PDF全文
Highly magnetic and air-stable silica-coated Fe particles have been prepared by a rapid and simple method. The specific magnetization of the sample can be as high as 201 Am^2 /kg even including silica, which is a non-magnetic material. The iron particle coated with silica is passivated and protected from oxidation. The influences of H2 reduction temperature on structure and magnetic properties are also studied. 相似文献
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采用solgel方法制备M型六角锶铁氧体.利用X射线衍射,透射电子显微镜和VSM对纳米晶样品进行了研究.当焙烧温度小于或等于800℃,样品存在复相.在同样条件下,压成薄片的样品呈现了硬磁与软磁SrFe12O19γFe2O3的纳米复合相的磁性交换耦合作用.800℃焙烧的薄片样品的比饱和磁化强度σS为75.6A·m2kg,内禀矫顽力HcJ为478.9kAm,最大磁能积(BH)max为14.9kJm3,而粉末样品相应的分别为75.9A·m2kg,509.6kAm和12.1kJm3.当焙烧温度大于850℃时,只有
关键词:
六角锶铁氧体
纳米复合
交换耦合
磁性 相似文献
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