http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0572484-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_af99df08b153738cd418446a75d09bfc |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-645 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-593 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-584 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-5935 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-584 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-80 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-593 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-645 |
| filingDate | 1992-01-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7604379a88588b71f4e0f564550e45be |
| publicationDate | 1993-12-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0572484-A1 |
| titleOfInvention | DENSITY PRODUCED BY PRESSURE-FREE OR LOW-PRESSURE GAS INTERNAL, SELF-ARMED SILICON NITRIDE CERAMICS. |
| abstract | Self-reinforced dense silicon azide ceramic prepared by pressureless sintering or low pressure gas sintering. The composition comprises (a) silicon azide, of which at least 20% is in the form of beta silicon azide whiskers having a high average aspect ratio, (b) 2 to 10% by weight of a grain limiting glass phase containing magnesium oxide, yttrium oxide, silicon dioxide, zirconia, and optionally, an oxide selected from the group consisting of oxides of calcium, gallium, indium and hafnium, and (c) a second crystalline phase in an amount between 0.5 and 5.0% by weight comprising zirconium oxide, and (d) crystalline phases of metal zirconium silicide and / or metallic zirconium silicon azide in a combined amount of between 0.1 and 3.0% by weight, wherein the metal is tantalum, calcium, hafnium, gallium or indium, and wherein when the metal is calcium, hafnium, gallium or indium, the same metal is in the form of o metal xide in the vitreous phase. The ceramic exhibits toughness as well as high resistance to fracture, it has a theoretical density of at least 98%. |
| priorityDate | 1991-02-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 62.