PRODUCTION OF ULTRAFINE GRAIN POWDER OF HIGH-PURITY HEMATITE

摘要

PURPOSE:To produce ultrafine grain powder having =500Angstrom mean diameter of high-purity hematite by hydrolyzing beta-diketone iron complex. CONSTITUTION:beta-diketone iron complex is introduced to the inside of a gasifying chamber wherein an inert gas such as gaseous N2 is passed and heated at 100-180 deg.C and gasified. Both steam of this beta-diketone iron complex and steam are introduced into a reaction furnace and allowed to react in a vapor phase in a temp. range of 500-900 deg.C to hydrolyze beta-diketone iron complex. In such a way, ultrafine grain powder of high-purity hematite is produced.