Abstract: Electrically-conductive superparamagnetic liquid colloids and methods for making and using them are described. The magnetic liquid colloids contain magnetic particles coated with conductive, organio-metallic compund, which impart the magnetic and conductive characteristics to the fluid. The coated magnetic particles are dispersed in a carrier fluid that gives the fluid viscosity, flow and vapor pressure properties.
Abstract: A novel method for producing magnetic microparticles from metallocenes is disclosed. The method involves combining an aqueous slurry of the metallocene and an aqueous slurry of a metal hydroxide and milling the slurries together. Fine magnetic particles are produced using the present method.
Type:
Grant
Filed:
August 10, 1990
Date of Patent:
December 10, 1991
Assignee:
Omni Quest Corporation
Inventors:
Mark S. Chagnon, Tracy Hamilton, John R. Ferris
Abstract: Magnetic inks useful for the production of magnetic recording products are disclosed. The present magnetic inks contain ferromagnetic barium ferrite particles dispersed in a flexible polymer medium.