Process for preparing a glass-ceramic body
US9688568B2 · kind B2 · utility
15Cited by
9References
4Claims
0Family size
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Key dates
| Filing date | Feb 12, 2016 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Feb 12, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C23/0025
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for preparing glass-ceramic body including the steps of providing a basic glass body and subjecting the basic glass body to a thermal treatment whereby a crystalline phase embedded in a glass matrix is formed. The basic glass body is made of a composition comprising 65 to 72 wt-% SiO2, at least 10.1 wt-% Li2O and at least 10.1 wt-% Al2O3 based on the total weight of the composition, the proportion of Li2O to Al2O3 being from 1:1 to 1.5:1. The thermal treatment involves a nucleation step followed by several crystallization steps at different temperatures, whereby at least two different crystalline phases are formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.