Sinterable aluminum nitride composition, sintered body from this composition and process for producing the sintered body
US5063183A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1990 |
| Grant date | Nov 5, 1991 |
| Priority date | — |
| Expiry date | Aug 14, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/581
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing a sintered body of aluminum nitride, which comprises PA1 (1) forming a raw molded article from a homogeneous mixture of PA2 (A) a fine powder of aluminun nitride, and PA2 (B) a sintering aid composed substantially of (a) at least one halogen compound of at least one metal selected from the group consisting of alkaline earth metals, lanthanum group metals and yttrium, and (b) at least one halogen-free compound of at least one metal selected from the group consisting of alkaline earth metals, lanthanum group metals and yttrium; and PA1 (2) sintering the raw molded article at a temperature of 1600.degree. to 2100.degree. C. in a non-oxidizing atmosphere. A sintered body having a high thermal conductivity and a high density of at least 3.2 g/cm.sup.3 is prepared by the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.