Process for forming tin-zirconia ceramics
US5169810A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Jul 5, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/96
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for forming ceramics comprises mixing titanium nitride with an average particle size less than 0.2 micron, zirconia having a particle size less than 1 micron and a stabilizing agent for stabilizing the zirconia in the tetragonal or cubic phase forming the mixture into a desired shape and firing at between 1300.degree. and 1700.degree. C. Preferably the stabilizing agent is in the form of coating on the zirconia. The process is suitable for forming hard and tough ceramics which are electroconducting and can be shaped by electro-discharge machining. It is particularly suitable for forming ceramics containing between 70 and 90% by weight titanium nitride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.