Coated ceramic particles, a ceramic-base sinter and a process for producing the same
US6024909A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 14, 1997 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | Oct 14, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/96
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing a ceramic-base sinter, comprising sintering coated ceramic particles wherein the particles are prepared for sintering by the steps of: dispersing a powder of ceramic core particles in a gaseous atmosphere to form a mixture of a gas and particles in a powder of highly dispersed core particles; charging a precursor for the coat forming substance that has been formed via the vapor phase and/or a precursor for the coat forming substance in a vapor-phase state and the mixture of the gas and the powder of highly dispersed core particles that have a predetermined dispersity according to the average diameter of the core particles in a coating start region of a coating space; coating the surfaces of the core particles with the coat forming substance by allowing the precursor to contact and/or impinge against the core particles; shaping and sintering the thus coated ceramic core particles or a mixture containing them under appropriate sintering conditions. The ceramic-base sinter of high performance thus produced is uniform, dense, and sintered firmly to provide a fine and highly controlled microstructure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.