Abstract
In this work, La–Zn doped M-type Sr–Ca hexaferrites Sr0.41Ca0.30La0.29FexZn0.25O19 (x=10.00–10.75) have been prepared by the traditional ceramic route. The phase composition of the magnetic powders was examined by X-ray diffraction. It was found that the magnetic powders with Fe content (10.00≤x≤11.50) consists of only one phase and the hematite (α-Fe2O3) phase is observed in the magnetic powder with Fe content (x) of 11.75. The surface morphology and magnetic properties of the sintered magnets were characterized by a field emission scanning electron microscopy and a magnetic properties test instrument. SEM images of the sintered magnets showed the hexagonal platelet shape. With increasing the Fe content (x), the remanence and maximum energy product were first increased and reached to a maximum and then decreased. While the intrinsic coercivity and magnetic induction coercivity increased with Fe content (x) from 10.00 to 11.75.
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