Impurity Pick-Up for the Preparation of NiCuZn Ferrite Powder Using Ball Milling Process

NiCuZn Ferrite 분말제조에 있어서 Ball Mill 분쇄 공정 중에 혼입되는 불순물의 함량

  • 고재천 (한국화학연구소 화학공정연구센터) ;
  • 류병환 (한국화학연구소 화학공정연구센터)
  • Published : 1999.08.01


The pick up impurity was studied for preparing the NiCuZn ferrite powder by a ball milling method that usually uses in the industrial ceramic process. The raw materials of NiO, CuO, ZnO, and $Fe_2O_3$ powder were weighted according to various spinel composition and mixed for 18 hrs by a wet ball milling method after that the slurry was followed by spray dried and calcined at $700^{\circ}C$ 3 hrs. The calcined NCZF powder was finally ball milled during 65 hrs as same method. The stainless steel ball and jar are used as mixing and milling equipment and the solid concentration of the slurry was 25 vol%. The impurities, stainless steel pickup, were effected by the composition of raw materials especially iron oxide, nickel oxide in the mixing process and by the rate of calcine of NiCuZn ferrite in final milling process. The empirical equation of stainless steel pickup was driven in the wet ball milling system. Finally, the composition of NiCuZn ferrite could be controlled by the empirical equation.



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