| 摘要 |
The invention relates to a process for preparing isotropic ferrite powders having a spinel structure of the general formula MeFe2O4, in which Me = aMn + bNi + cZn + dCo + eFe(II), the atomic mass ratios a, b, c, d and e each being from 0 to 1 and their sum being equal to 1, by reacting an aqueous solution or suspension of one or more of the Me salts and an aqueous iron(III) chloride solution with an aqueous solution of sodium carbonate and/or potassium carbonate, drying the resulting mixture which consists of sparingly soluble MeCO3 and iron(III) carbonate in an alkali metal chloride solution, and then heating the salt mixture to a temperature above the melting point of the alkali metal chloride but not above 1200 DEG C, and isolating the octahedral ferrite of the composition MeFe2O4, which forms in the process, by leaching with water.
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