http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1224956-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5635744f3e22ca8d710dd1f2707bee23 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03C10-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03C4-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C10-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C4-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C10-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C3-095 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C10-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C8-24 |
| filingDate | 1985-01-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1987-08-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_aef55b9e20052e776bcc3a04266f5968 |
| publicationDate | 1987-08-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1224956-A |
| titleOfInvention | High expansion glass-ceramic articles |
| abstract | Abstract of the Disclosure The present invention relates to the production of photothermally crystallizable, chemically-machinable glass-ceramic articles exhibiting coefficients of thermal expansion over the temperature interval of 20°-400°C between 120-160 x 10-7/°C. Base glass articles having compositions consisting essentially, in weight percent, of 5.5-15% Li2O, 2-25% Al2O3, the weight ratio Al2O3:Li2O being less than 1.7.1, 60-85% SiO2, and at least one photosensitive metal in the indicated proportion selected from the group of 0.001-0.03% gold, computed as Au, 0.001-0.3% silver, computed as AgCl, and 0.001-1% copper, computed as Cu2O, are first exposed to ultraviolet radiations to develop a latent image therein, then heated to a temperature between the annealing and softening points thereof to generate metallic nuclei therein and the growth of lithium metasilicate particles thereon, and, finally, heated to a temperature in excess of 700°C, but less than 800°C, to effect an essentially crystalline article, including the conversion of a portion of the lithium metasilicate crystals to lithium disilicate. Quartz and/or cristobalite will also be formed. |
| priorityDate | 1984-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.