【摘要】 采用固相反应法制备Sr_1-xLa_x Fe_11.8-x Zn_x O₁₉（0≤x≤0.42）M型六角铁氧体磁粉和磁体。X射线衍射（XRD）分析表明,La-Zn取代量x在0⁰.42范围内磁粉是单一的磁铅石型相。磁体的FESEM观察表明,不同La-Zn取代量的磁体形成了均匀的六角片状结构。随La-Zn取代量的增大,磁体的剩磁B_r和最大磁能积（BH）_max先增后降,最大值对应的取代量为0.3,而其内禀矫顽力H_cj和磁感应矫顽力H_cb则单调下降。更多还原

【Abstract】 The M-type hexaferrite Sr_1-xLa_x Fe_11.8-x Zn_x O₁₉（0≤x≤0.42） powder and magnets were prepared by solid state reaction method. X-ray diffraction analysis shows that the single magnetoplumbite phase was obtained in the magnetic powder with x ranging from 0 to 0.42. The FESEM image showed that the perfect hexagonal flakre structure was formed in the sintered magnets and the grains were distributed homogenously. With increasing x, the remanence B_rand maximum energy product（BH）_max of the magnets first increases and then decreases with maximum values of 421.8 m T and 33.43 k J/m³ at x=0.30, respectively. Both the intrinsic coercivity H_cj and magnetic induction coercivity H_cbdecreases montonously with x increasing from 0 to 0.42.更多还原