Reinforced glass and glass-to-be-treated for reinforced glass
AssigneeAsahi Glass Company, Limited
InventorsShin-ichi AMMA, Madoka ONO
Life of this patent
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Abstract
The present invention relates to a strengthened glass obtained by strengthening a glass to be treated which the glass to be treated contains, as expressed in mole percentage on an oxide basis, from 2% to 15% of Fe2O3 or from 5% to 15% of TiO2, has a glass transition point of from 450° C. to 650° C. and has a maximum thermal expansion coefficient αmax of 430×10−7/° C. or above in a temperature range between the glass transition point and a yield point.
Claims5
A strengthened glass obtained by strengthening a glass to be treated,
- wherein the glass to be treated comprises, as expressed in mole percentage on an oxide basis, from 2% to 15% of Fe2O3 or from 5% to 15% of TiO2, has a glass transition point of from 450° C. to 650° C. and has a maximum thermal expansion coefficient αmax of 430×10−7/° C. or above in a temperature range between the glass transition point and a yield point.
A glass to be treated for strengthening, comprises, as expressed in mole percentage on an oxide basis, from 55% to 80% of SiO2, from 0 to 15% of Al2O3, from 0.1% to 10% of MgO, from 0.1% to 10% of CaO, from 0 to 8% of SrO, from 0 to 5% of BaO, from 8% to 25% of Na2O, from 0.1% to 4% of K2O, and further from 2% to 15% of Fe2O3 or from 5% to 15% of TiO2.
Dependencies are inferred from the claim text.