【摘要】 采用固相反应法制备了Sc元素掺杂的MnZn铁氧体，分别采用X射线衍射仪（XRD）、扫描电镜（SEM）、振动样品磁强计（VSM）以及 LCR 表等对样品的结构和磁性能进行表征。结果表明：对于Mn_0.757Zn_0.107Sc_xFe_2.136-xO₄（x = 0～0.07）材料，当 x ≤ 0.03 时，样品均表现为单相立方尖晶石结构，x≥0.05 时，样品中观察到另相衍射峰；x 由0.01 增加至 0.07 时，样品的晶格常数 a 呈增大趋势，平均晶粒尺寸 D_m减小、孔隙率p相应增大；在x = 0～0.07的考察范围内，饱和磁化强度M_s和矫顽力H_c均呈先增大后减小的趋势，当x = 0.01时样品具有最大的饱和磁化强度92.7A·m²/kg,x = 0.03 时样品呈现最大的矫顽力 95.7 A/m；动态磁导率 μ （100 kHz）由 640 减小至 301，品质因数 Q 峰值由251 减小至 78。更多还原

【Abstract】 Sc-doped MnZn ferrites, i. e. Mn_0.757Zn_0.107Sc_xFe_2.136-xO₄（x=0-0.07）, were prepared by solid-state reaction method. The structure and magnetic properties of the samples were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, vibrating sample magnetometer （VSM） and LCR meter, respectively. It is found that the samples with x≤0.03 show single-phase cubic spinel structure, and another phase diffraction peak is observed when x≥0.05.For Sc-doped samples with x increasing from 0.01 to 0.07, the lattice constant （a） increases slightly, moreover, the average grain size （D_m） decreases, whereas the porosity （p） shows an increase. Furthermore, the saturation magnetization （M_s） and coercivity （H_c） of the samples increase initially and then decrease with increasing x from 0 to 0.07. As a result, the sample with x=0.01 and x=0.03 has the maximum saturation magnetization of 92.7 A·m²/kg, and the maximum coercivity of95.7 A/m, respectively. Accordingly, dynamic permeability μ （100 kHz） gradually decreases from 640 to 301, and the peak value of quality factor Q declines from 251 to 78.更多还原