| 摘要 |
The invention relates to a process for preparing finely particulate hexagonal Me2Y ferrites of the general formula M2Me2Fe12O22, in which M is barium, strontium, calcium and/or lead, and Me is divalent manganese, copper, iron, cobalt, nickel, zinc, magnesium and/or equimolar amounts of lithium and trivalent iron, by reacting an aqueous solution or suspension of an M salt, an aqueous solution or suspension of an Me salt and an aqueous solution of an iron(III) salt with an aqueous sodium carbonate solution, drying the resulting mixed precipitate, heating the dry salt mixture to a temperature of from 800 DEG C to 1050 DEG C, and then isolating the platelet-shaped (bladed) Me2Y ferrite formed in the process from the Me2Y ferrite/sodium salt mixture by leaching with water.
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