SPHERICAL, VOID-FREE PARTICLE FORMATION IN SPRAY-DRIED FERRITES
Ferrite beads prepared via spray drying of a slurry of mixed oxides have characteristic voids or dimples present in the dried particles. This invention relates to the preparation of a slurry of ferrite forming metal oxides in a liquid wherein the slurry has a viscosity at about 23.degree.C of betwee...
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Zusammenfassung: | Ferrite beads prepared via spray drying of a slurry of mixed oxides have characteristic voids or dimples present in the dried particles. This invention relates to the preparation of a slurry of ferrite forming metal oxides in a liquid wherein the slurry has a viscosity at about 23.degree.C of between about 55,000 centipoise and about 140,000 centipoise, spray drying the slurry to form substantially spherical metal oxide beads, and sintering the beads to form ferrite particles which are continuous in surface area and free of interior voids. Electrostatographic develo per mixtures prepared with said ferrite materials and processes of developing electrostatic latent images therewith are also disclosed. |
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