Thermostable iron oxide pigments

Iron oxide particles containing at least 5% by weight of iron (II) content calculated as FeO are stabilized against atmospheric oxidation by a coating of at least one compound containing boron and those particles are useful as coloring pigments and magnetic particles in magnetic recording media.

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Bibliographische Detailangaben
Hauptverfasser: BIERMANN, HANS-PETER, HEINE, HEINRICH, KOEHLER, PETER
Format: Patent
Sprache:eng
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Zusammenfassung:Iron oxide particles containing at least 5% by weight of iron (II) content calculated as FeO are stabilized against atmospheric oxidation by a coating of at least one compound containing boron and those particles are useful as coloring pigments and magnetic particles in magnetic recording media.