TEMPERED GLASS, AND TEMPERED GLASS PLATE
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United States of America Patent
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Issued Date -
Oct 31, 2013
app pub date -
Jan 16, 2012
filing date -
Jan 18, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Provided is a tempered glass having a compression stress layer in a surface thereof, the tempered glass comprising, as a glass composition in terms of mol %, 45 to 75% of SiO2, 3 to 15% of Al2O3, 0 to 12% of Li2O, 0.3 to 20% of Na2O, 0 to 10% of K2O, and 1 to 15% of MgO+CaO, and having a molar ratio (Al2O3+Na2O+P2O5)/SiO2 of 0.1 to 1, a molar ratio (B2O3+Na2O)/SiO2 of 0.1 to 1, a molar ratio P2O5/SiO2 of 0 to 1, a molar ratio Al2O3/SiO2 of 0.01 to 1, and a molar ratio Na2O/Al2O3 of 0.1 to 5, wherein the surface is etched partially or entirely before tempering treatment.
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