【発明の名称】磁気吸引性粒子及びその製法

Title:

【発明の名称】磁気吸引性粒子及びその製法

Document Type and Number:

Japanese Patent JP2757964

Kind Code:

B2

Abstract:

Magnetically attractable particles comprise a core of magnetic material encapsulated in a metal oxide coating. They may be made by emulsifying an aqueous solution or dispersion of the magnetic material or precursor, and an aqueous solution or sol of a coating inorganic oxide or precursor, in an inert water-immiscible liquid. The aqueous droplets are gelled, e.g. by ammonia or an amine, recovered, and heated at 250 - 2000C. The resulting particles are generally smooth spheres below 100 microns in diameter and often of sub-micron size.

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Inventors:

JAN UIKUTAA SANGU
HOORU GUROOBUSU
ROBAATO EDOWAADO BAARERU
JERARUDO FURIN

Application Number:

JP13123189A

Publication Date:

May 25, 1998

Filing Date:

May 24, 1989

Export Citation:

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Assignee:

ARUFUA BAIOTETSUKU SPA

International Classes:

B03C1/01; C01G49/00; C01G49/08; G01N33/543; H01F1/36; C12N11/14; H01F1/37; H01F1/44; (IPC1-7): C01G49/00; C01G49/08; H01F1/36; H01F1/37

Domestic Patent References:

JP6364308A

Attorney, Agent or Firm:

Kazuo Shamoto (5 outside)

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