Method of manufacture of dental porcelain having small leucite crystallites
US6660073B1 · kind B1 · utility
1Cited by
16References
15Claims
0Family size
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Key dates
| Filing date | Aug 8, 2000 |
| Grant date | Dec 9, 2003 |
| Priority date | — |
| Expiry date | Aug 8, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2214/20
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A porcelain composition for dental restorations comprising a leucite crystallite phase and a glass matrix phase, wherein the leucite crystallites possess diameters not exceeding about 10 micron. Preferably, the porcelain composition has a maturing temperature from about 750° to about 1050° C. and a coefficient of thermal expansion from about 12×10−6/° C. to about 17.5×10−6/° C., and comprises:ComponentAmount (wt. %)SiO257-66Al2O3 7-15K2O 7-15Na2O 7-12Li2O0.5-3. 
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.