Ceramic milling media containing tetragonal zirconia
AssigneeEastman Kodak Company
InventorsDilip K. Chatterjee, Thomas N. Blanton, Debasis Majumdar
Life of this patent
Estimating the term…
Abstract
The present invention is milling media composed of ceramic particles having an average size of 0.1 to 20 mm. The ceramic particles contain a tetragonal zirconia core and a continuous shell on the core comprising cubic zirconia, monoclinic zirconia, spinel or zircon. The present invention is also a method of manufacturing the milling media which includes providing ceramic particles having an average size of 0.1 to 20 mm. The ceramic particles are tetragonal zirconia. The ceramic particles are coated with a clay material and sintered to form a shell of cubic zirconia, monoclinic zirconia, spinel or zircon over the tetragonal zirconia core.
Claims15
Milling media comprising:
- ceramic particles having an average size of 0.1 to 20 mm, said ceramic particles comprising a tetragonal zirconia core and a continuous hard case shell consisting essentially of a material selected from the group consisting of cubic zirconia, monoclinic zirconia and spinel.
Milling media comprising:
- ceramic particles having an average size of 0.1 to 20 mm, said ceramic particles comprising a tetragonal zirconia core and a continuous hard case shell comprising essentially zircon.
A method of producing milling media comprising:
- providing ceramic particles having an average size of 0.1 to 20 mm, said ceramic particles comprising tetragonal zirconia;
- coating the ceramic particles with a clay material;
- sintering the coated ceramic particles to form a shell on the ceramic particles comprising essentially a material selected from the group consisting of cubic zirconia, monoclinic zirconia, and spinel.
A method of producing milling media comprising:
- providing ceramic particles having an average size of 0.1 to 20 mm, said ceramic particles comprising tetragonal zirconia;
- coating the ceramic particles with a clay material;
- sintering the coated ceramic particles to form a shell on the ceramic particles comprising essentially zircon.
Dependencies are inferred from the claim text.