IRON OXIDE PARTICULATE POWDER

IRON OXIDE PARTICULATE POWDER

PROBLEM TO BE SOLVED: To obtain iron oxide particulate powder having high fluidity and low packing density and excellent in magnetic characteristics by mixing spherical iron oxide particles and octahedral iron oxide particles. SOLUTION: The iron oxide particles are preferably based on magnetite and...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MIYAZONO TAKESHI, YOSHIMARU KATSUHIKO
Format: Patent
Sprache:eng
Schlagworte:
ADHESIVES
CHEMICAL PAINT OR INK REMOVERS
CHEMISTRY
CINEMATOGRAPHY
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
CORRECTING FLUIDS
DYES
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
FILLING PASTES
HOLOGRAPHY
INKS
INORGANIC CHEMISTRY
MAGNETOGRAPHY
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
PASTES OR SOLIDS FOR COLOURING OR PRINTING
PHOTOGRAPHY
PHYSICS
POLISHES
PREPARATION OF CARBON BLACK
TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
USE OF MATERIALS THEREFOR
WOODSTAINS
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To obtain iron oxide particulate powder having high fluidity and low packing density and excellent in magnetic characteristics by mixing spherical iron oxide particles and octahedral iron oxide particles. SOLUTION: The iron oxide particles are preferably based on magnetite and may contain various effective elements such as Si, Al and Ti. Spherical or octahedral magnetite particles are obtained by controlling pH in the oxidation of ferrous hydroxide. The number average particle diameter of magnetite particulate powder is 0.15-0.5 μm, the existence number proportion of the octahedral magnetite particles to the total number is 5-90%, and when the average particle diameter of the spherical magnetite particles is represented by X (μm), the average particle diameter of the octahedral magnetite particles by Y (μm) and the existence number proportion of the octahedral magnetite particles by Z (%), the formula is preferably satisfied. The magnetite particulate powder preferably has