NiCuZn Ferrite의 제조공정 제어 (제1보) - 습식 볼밀링에 의한 다성분 원료의 혼합 및 분쇄 공정의 고찰

다국어 초록 (Multilingual Abstract)

In this research, the processing control of NiCuZn Ferrite has been developed. The mixing and the size reduction of raw materials have been proceeded. In order to produce NiCuZn Ferrite, highly concentrated slurry with fixed ratio and wet ball milling were used. First, the dispersion behavior of raw mixture at the region of pH4 ~ pH11 has been studied. Using wet ball milling operation, the best conditions of mixing and size reduction have been determined. Further more, the most suitable conditions, such as, dispersant kind, dispersant amount, milling time, and slurry concentration have been studied. The poly acrylic ammonium salt (PAN) was chosen as a suitable dispersant to have effective dispersion in basic region. The slurry of raw mixture without dispersant, showed high viscosity and poor grindability. As 0.7 wt% of PAN was added, the concentrated slurry (up to 55 vol%) was possible, and showed well grindability. After 18 h ball milling of 30 vol % of mixture slurry with 0.7 wt % of PAN, the average particle size and specific surface area of raw mixture were 0.54 ㎛ and 12.92 ㎡/cc, respectively. The ball milled raw mixture, calcined at 700 ℃ for 3h, was totally changed into NiCuZn Ferrite with spinel phase.