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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 80 0℃ ,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SrFe1 2 O1 9 γ Fe2 O3 的纳米复合相的磁性交换耦合作用 .80 0℃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 .9A·m2 kg ,5 0 9.6kA m和 12 .1kJ m3 .当焙烧温度大于 85 0℃时 ,只有单一M相
M-type hexagonal strontium ferrite was prepared by sol-gel method.The nanocrystalline samples were characterized by X-ray diffraction, transmission electron microscopy and VSM.When the calcination temperature was less than or equal to 80 0 ℃, , And the pressed samples show the magnetic exchange coupling between the hard magnetic and the soft magnetic SrFe1 2 O1 9 γ Fe2 O3 nanocomposite phase.The specific saturation magnetization σS of the samples sintered at 80 ℃ is 75.6A · m2 kg , The intrinsic coercivity HcJ is 478.9kA m and the maximum energy product (BH) max is 14.9kJ m 3, while the corresponding powder samples are 75.9A · m 2 kg, 50 9.6kA m and 12.1kJ m 3, respectively The calcination temperature is greater than 85 0 ℃, only a single M-phase