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US 9,428,415 B2Granted
Glass and manufacturing method of glass plate
AssigneeAsahi Glass Company, Limited
InventorsYuki Kondo, Yuya Shimada, Hiroyuki Hijiya
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Abstract
To provide glass having a favorable color tone, and its production process. Glass comprising, as represented by mass percentage based on oxides, at least 60% and at most 75% of SiO2, at least 8% and at most 20% of Na2O, at least 4.5% of MgO, at least 1% and at most 10% of CaO, and at least 0.01% and at most 0.5% of Er2O3.
Claims13
Glass comprising, as represented by mass percentage based on oxides:
- SiO2:
- at least 60% and at most 75%,
- Na2O:
- at least 8% and at most 20%,
- MgO:
- at least 4.5%,
- CaO:
- at least 1% and at most 10%, and
- Er2O3:
- at least 0.01% and at most 0.5%,
- wherein a Q value determined by the formula (MgO content/CaO content)×(CaO content+Na2O content−Al2O3 content) as represented by mass percentage based on oxides, is at least 15.
8 more elements
Dependencies are inferred from the claim text.