| 摘要 |
PURPOSE:To lessen the loss in the core of transformer by smashing, molding and sintering the material powder being mixed and prebaked. CONSTITUTION:Mn-Zn ferrite material powder is prebaked after being mixed, and then, the powder is smashed for 8-40hours with a ball mill made of zirconia. Next, it is molded and sintered. As the Mn-Zn ferrite material, Fe2O3 having content of 99% or more, MnCO3 having content of 99.5% or more, or ZnO having content of 99% or more is desirable. For the prebaking, it is desirable that it should be performed at 800-950 deg.C. Moreover, it is desirable that the sintering should be performed for about four hours at 1000-1200 deg.C in N2 gas atmosphere. |
