Preparation of ferrites from iron (II) sulfate

Details Preparation of ferrites from iron (II) sulfate Preparation of ferrites from iron (II) sulfate

1983-04-14

1984-09-04

Carter, Herbert T.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

252 6262, 252 6263, C01G 4900

Patent

active

044696698

ABSTRACT:
M-Type ferrites of the formula AFe.sub.12 O.sub.19, Me.sub.2 Y-type ferrites of the formula A.sub.2 Me.sub.2 Fe.sub.12 O.sub.22 or spinel-type ferrites of the formula MeFe.sub.2 O.sub.4, where A is Ba, Sr, Pb and/or Ca and Me is Zn, Mn, Co, Cu, Fe(II) and/or 1/2(Li(I)+Fe(III)), are prepared by a process wherein iron(II) sulfate hydrate is dehydrated and oxidized and then mixed with sodium carbonate and/or potassium carbonate and salts and/or oxides of other A and/or Me cations required in addition to Fe(III) for ferrite formation, the mixture is heated at from 700.degree. to 1,200.degree. C., and the resulting ferrite is isolated by leaching with water.

REFERENCES:
patent: 3428416 (1969-02-01), Gie et al.
patent: 3582266 (1971-06-01), Sopp et al.
patent: 4292294 (1981-09-01), Patil et al.
patent: 4401643 (1983-08-01), Hibst et al.

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