Magnetic iron oxide pigment and recording media

Details Magnetic iron oxide pigment and recording media Magnetic iron oxide pigment and recording media

1984-06-25

1987-07-28

Robinson, Ellis P.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

252 6254, 252 6256, 427127, 427128, 427130, 427132, 428329, 428403, 428694, 428900, G11B 5706

Patent

active

046831673

ABSTRACT:
An improved magnetic particulate pigment suitable for use in recording media and media employing it are disclosed. The particles of the pigment comprise a magnetic core with an epitaxial layer containing approximately 0.05-2.0% of the total pigment as zinc ion. A process for preparing such particles is also disclosed.

REFERENCES:
patent: 3574685 (1971-04-01), Haines
patent: 4064292 (1977-12-01), Schoenafinger
patent: 4125474 (1978-11-01), Dezawa
patent: 4188302 (1980-02-01), Becker
patent: 4287233 (1981-09-01), Rudolf
patent: 4296149 (1981-10-01), Rudolf
patent: 4321302 (1982-03-01), Umeki
patent: 4414245 (1983-11-01), Miyazawa
patent: 4457955 (1984-07-01), Okamura
patent: 4539261 (1985-09-01), Nakata

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