Preparation of sintered zirconia body
US5620637A · kind A · utility
69Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1994 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Nov 17, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/64
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A sintered zirconia sheet is prepared by firing a green sheet of zirconia while placing at least one weight on the sheet to apply a load thereto. Preferably a weight made of a porous material having a porosity of 5 to 30% and having a weight per unit area W (g/cm.sup.2) and a surface area S (cm.sup.2) is placed on the sheet to apply a load per unit area G (g/cm.sup.2) to the sheet under the conditions: S.ltoreq.200, G.ltoreq.5, and W/G.gtoreq.0.5. Sintered zirconia sheets free of camber, distortion or cracking are obtained, particularly when their dimensions are at least 15 cm.times.15 cm and up to 0.5 mm thick.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.