US 11,754,764 B2
Lithium containing glass with high oxidized iron content and specified redox ratio
George B. Goodwin, Cranberry Township, PA (US); Mehran Arbab, Pittsburgh, PA (US); Caroline S. Harris, Pittsburgh, PA (US); and Larry J. Shelestak, Bairdford, PA (US)
Assigned to PPG Industries Ohio, Inc., Cleveland, OH (US)
Filed by PPG INDUSTRIES OHIO, INC., Cleveland, OH (US)
Filed on Sep. 15, 2021, as Appl. No. 17/475,711.
Application 16/781,567 is a division of application No. 16/211,269, filed on Dec. 6, 2018, granted, now 10,613,304, issued on Apr. 7, 2020.
Application 16/211,269 is a division of application No. 15/583,253, filed on May 1, 2017, granted, now 10,191,256, issued on Jan. 29, 2019.
Application 15/583,253 is a division of application No. 13/768,030, filed on Feb. 15, 2013, granted, now 9,658,437, issued on May 23, 2017.
Application 17/475,711 is a continuation of application No. 16/781,567, filed on Feb. 4, 2020, granted, now 11,150,389.
Claims priority of provisional application 61/602,909, filed on Feb. 24, 2012.
Prior Publication US 2022/0075105 A1, Mar. 10, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 17/10 (2006.01); C03B 5/173 (2006.01); C03C 1/00 (2006.01); C03C 3/083 (2006.01); C03C 3/085 (2006.01); C03C 3/095 (2006.01); C03C 4/08 (2006.01); C03C 4/10 (2006.01); F41H 5/04 (2006.01); G02B 5/22 (2006.01); G02B 13/14 (2006.01); C03C 10/00 (2006.01); C03C 21/00 (2006.01)
CPC G02B 5/226 (2013.01) [B32B 17/10045 (2013.01); B32B 17/10064 (2013.01); B32B 17/10119 (2013.01); B32B 17/10137 (2013.01); C03B 5/173 (2013.01); C03C 1/004 (2013.01); C03C 3/083 (2013.01); C03C 3/085 (2013.01); C03C 3/095 (2013.01); C03C 4/082 (2013.01); C03C 4/10 (2013.01); F41H 5/0407 (2013.01); G02B 13/14 (2013.01); B32B 2307/412 (2013.01); B32B 2605/08 (2013.01); B32B 2605/18 (2013.01); C03C 10/0027 (2013.01); C03C 21/002 (2013.01); C03C 2204/00 (2013.01); Y02P 40/57 (2015.11)] 8 Claims
OG exemplary drawing
 
1. A low infrared absorbing (LIRA) glass composition comprising:
 
 
 
 Component Range
 
 
 
 
 SiO2 60-63 wt %
 
 Na2O 10-12 wt %
 
 Li2O 4-5.5 wt %
 
 Al2O3 17-19 wt %
 
 ZrO2 2-5 wt %
 
 (Al2O3 + ZrO2) 21.5-24 wt %
 
 FeO 0.0005-0.015 wt %
 
 Fe2O3 (total iron) 50-1200 ppm;
 
 
an oxidizer selected from the group of cerium oxide in the range of greater than 0 to 0.50 wt % and/or manganese oxide in the range of greater than 0 to 0.75 wt %;
less than 5 wt % of additional glass forming materials and glass modifiers or colorants, selected from the group of MgO, CaO, MnO, TiO2, Sb2O3, As2O3, K2O, PbO, SO3, colorants and mixtures thereof; and
a redox ratio in the range of 0.005-0.15, wherein glass formed from the glass composition and having a thickness of 0.223 inch (5.7 millimeters) has:
a visible transmission over a wavelength range of 380 to 780 nm of equal to or greater than 88%;
an infrared transmission over a wavelength range of 800 to 2100 nm of equal to or greater than 80%; and
an infrared viewing transmission over the wavelength range of 400 to 920 nm of equal to or greater than 80%.