METAL POWDER PRODUCING METHOD FOR HIGH-DENSITY RECORDING MEDIUM

摘要

preparing goetite of small grain size by lowering the goetite forming temperature and NaOH concentration; transferring the formed goetite solution to the reaction bath of 10-20 deg.C; and adding Zn2- to it until the concentration of goetite(α-FeOOH) reaches 0.1-0.3mM and reacting them. The method produces goetite with small grain size and large diameter.