Glass plate
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United States of America Patent
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Oct 4, 2022
Grant Date -
Sep 24, 2020
app pub date -
Jun 11, 2020
filing date -
Dec 19, 2017
priority date (Note) -
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Abstract
A glass sheet contains, as represented by mass percentage based on oxides, SiO2: 65-75%, Al2O3: 0-20%, MgO: 0-5%, CaO: 2-20%, Na2O: 5-20%, K2O: 0-10%, total iron in terms of Fe2O3 (t-Fe2O3): 0.2-1.0%, TiO2: 0.65-1.5%, and CeO2: 0.1-2.0%. A ratio of the content of MgO to RO is 0.20 or less, where RO is a total amount of MgO, CaO, SrO and BaO. Fe-redox is from 30 to 57%. The glass sheet has a visible light transmittance Tv_A of 65% or more, a solar transmittance Te of 50% or less, and a dominant wavelength Dw of transmitted light of from 508 to 580 nm, in terms of a 3.9-mm thickness of the glass sheet. A value of A=([t-Fe2O3]×Fe-redox)/[TiO2] is from 20 to 40, where [t-Fe2O3] is the content of t-Fe2O3 and [TiO2] is the content of TiO2.
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