Glass material and glass ceramic product
AssigneesNGK Insulators, Ltd., NGk Opt Ceramics, Ltd.
InventorsTakashi Ota, Kazutoshi Tohyama, Masashi Fukuyama, Akiyoshi Ide
Life of this patent
Estimating the term…
Abstract
A SiO2—Al2O3—Li2O component-based glass material, which comprises, as basic components, SiO2: 60-63 wt %; Al2O3: 23-25 wt %; and Li2O: 4-5 wt % and, as modifying components, ZrO2: 1.5-2.5 wt %; TiO2: 0.5-2.5 wt %; MgO: 0.5-1.5 wt %; ZnO: 0.5-1.2 wt %; Na2O: 0.5-2.0 wt %; and K2O: 0.5-2.0 wt %, and further comprises any one of BaO: 0.5-1.0 wt, CaO: 1.0-2.0 wt %, and B2O3: 0.01-1.0 wt %. This can be reheat-formed in a glass state and has a low thermal expansion coefficient.
Claims6
A SiO2—Al2 O3—Li2O component-based glass material consisting essenially of, as basic components, SiO2:
- 60-63 wt %;
- Al2O3:
- 23-25 wt %;
- and Li2O:
- 4-5 wt % and, as modifying components, ZrO2:
- 1.5-2.5 wt %;
- TiO2:
- 0.5-2.5 wt %;
- MgO:
- 0.5-1.5 wt %;
- ZnO:
- 0.5-1.2 wt %;
- Na2O:
- 0.5-2.0 wt % P2O5:
- 0 wt %;
- and K2O:
- 0.5-2.0 wt %, and further includes BaO:
- 0.5-1.0 wt %.
Dependencies are inferred from the claim text.