Novel ferrite-type magnetic recording powder

A novel magnetic recording powder, consisting of an oxide compsn with a hexagonal crystal structure of ferrite type, has (a) the compsn 14-20 at% strontium and/or barium oxide, 15-40 at% chromium oxide, 2-15 at% zinc magnesium and/or copper oxides, 2-15 at% titanium, zirconium and/or tin oxide, bala...

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Bibliographische Detailangaben
Hauptverfasser:	TAKESHITA, TAKUO, KITAMOTO, SAITAMA, JP, OOKUBO, KIYOYUKI, KITAMOTO, SAITAMA, JP, IGARASHI, KAZUNORI, KITAMOTO, SAITAMA, JP, KOMADA, NORIKAZU, KITAMOTO, SAITAMA, JP, ISHIYAMA, KOUICHI, KITAMOTO, SAITAMA, JP
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F CORRECTING FLUIDS DYES FILLING PASTES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INKS INORGANIC CHEMISTRY METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PHYSICS POLISHES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	A novel magnetic recording powder, consisting of an oxide compsn with a hexagonal crystal structure of ferrite type, has (a) the compsn 14-20 at% strontium and/or barium oxide, 15-40 at% chromium oxide, 2-15 at% zinc magnesium and/or copper oxides, 2-15 at% titanium, zirconium and/or tin oxide, balance iron oxide and impurities; (b) a saturation magnetisation of at least 15 emu/g; and (c) a Curie temp of max 155 deg C.