Zirconia Ceramic
AssigneeAdvanced Nanotechnology Limited
InventorsMichihito Muroi, Geoff Trotter
Life of this patent
Estimating the term…
Abstract
A multi-component powder is described for consolidation to form a sinterable green body for a zirconia ceramic. The multi-component powder comprises at least 80% by volume of nano-sized particles of zirconia and up to 20% by volume of a stabilising agent which may form a coating around the nano-sized particles of zirconia and is optionally in particulate form. A multi-component slurry formed by suspending the powder in a liquid is also described as well as a green body formed from either the slurry or the powder. A zirconia ceramic formed by sintering the green body is also described.
Claims59
A multi-component powder for consolidation to form a sinterable green body for a zirconia ceramic, the multi-component powder comprising:
- at least 80% by volume of nano-sized particles of zirconia;
- and
- up to 20% by volume of a stabilising agent.
A multi-component slurry for the preparation of a sinterable green body for a zirconia ceramic, the multi-component slurry comprising:
- at least 80% by volume of nano-sized particles of zirconia;
- and
- up to 20% by volume of a stabilising agent, suspended in a liquid.
A zirconia ceramic comprising at least 80% tetragonal phase of zirconia and having a Vickers hardness greater than 9 GPa or a fracture toughness greater than 10 MPa.m1/2 .
A zirconia ceramic having a bending strength greater than 700 MPa, a Vickers hardness greater than 9 GPa and a fracture toughness greater than 7 MPa.m1/2.
Dependencies are inferred from the claim text.