Back to results
US 6,887,811 B2Granted
Spherical alumina particles and production process thereof
AssigneeShowa Denko K.K.
InventorsEiji Kanbara, Tomiharu Yamada
Life of this patent
Estimating the term…
Abstract
A process for producing roundish alumina particles includes heating at 1,000 to 1,600° C. a composition containing at least one of electrofused alumina and sintered alumina having a mean particle size greater than 35 μm, and at least one species selected from the group consisting of a halogen compound, a boron compound and an alumina hydrate; and crushing the composition.
Claims17
A process for producing roundish alumina particles, comprising:
- heating at 1,000 to 1,6000 °C. a composition containing at least one of electrofused alumina and sintered alumina having a mean particle size greater than 35 μm, an alumina hydrate and at least one species selected from the group consisting of a halogen compound and a boron compound;
- and
- crushing the composition;
- wherein the alumina hydrate is added in an amount of 50 to 300 mass % based on said at least one of electrofused alumina and sintered alumina as reduced to alumina.
1 more element
Dependencies are inferred from the claim text.