The influences of the first sintering temperature and the sintering duration on the magnetic coercivity and induction of Barium-Ferrite are investigated. The B-H curves of Barium-Ferrite are drawn by means of X-Y recorder attached to the Permagraph magnet tester, varing the mole ratio of the raw mixture, the molding pressure and the mole percentage of the impurities such as Cr₂O₃ and zinc stearate.