US 12,071,367 B2
Glass substrates including uniform parting agent coatings and methods of ceramming the same
Shuo Cui, Burlington, MA (US); Jill Marie Hall, Elmira, NY (US); Gregory William Keyes, Rochester, NY (US); and John Robert Saltzer, Jr., Beaver Dams, NY (US)
Assigned to Corning Incorporated, Corning, NY (US)
Appl. No. 17/259,327
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Jul. 15, 2019, PCT No. PCT/US2019/041822
§ 371(c)(1), (2) Date Jan. 11, 2021,
PCT Pub. No. WO2020/018432, PCT Pub. Date Jan. 23, 2020.
Claims priority of provisional application 62/749,800, filed on Oct. 24, 2018.
Claims priority of provisional application 62/698,595, filed on Jul. 16, 2018.
Prior Publication US 2021/0130228 A1, May 6, 2021
Int. Cl. C03C 17/00 (2006.01); C03C 17/22 (2006.01); C03C 17/25 (2006.01)
CPC C03C 17/007 (2013.01) [C03C 17/225 (2013.01); C03C 17/25 (2013.01); C03C 2217/214 (2013.01); C03C 2217/281 (2013.01); C03C 2217/29 (2013.01); C03C 2217/42 (2013.01); C03C 2218/112 (2013.01); C03C 2218/355 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A coated glass article comprising:
a glass substrate having a parting agent composition layer thereon, the glass substrate being formed from a glass composition including from about 55 wt % to about 80 wt % SiO2, from about 2 wt % to about 20 wt % Al2O3, from about 5 wt % to about 20 wt % Li2O, from about 0 wt % to about 10 wt % B2O3, from about 0 wt % to about 5 wt % Na2O, from about 0 wt % to about 10 wt % ZnO, from about 0.5 wt % to about 6 wt % P2O5, and from about 0.2 wt % to about 15 wt % ZrO2, the parting agent composition layer formed from an aqueous dispersion comprising boron nitride and a colloidal inorganic binding agent, wherein the boron nitride is present in the form of agglomerated particles having an average particle size of less than or equal to about 20 μm.
 
15. A coated article comprising:
a glass-ceramic substrate having a heat treated parting agent layer thereon, the parting agent layer prior to heat treatment being formed from an aqueous dispersion comprising boron nitride and a colloidal inorganic binding agent, and
further wherein the coated glass-ceramic substrate has at least one of: a transmission metric (*T) of from about 19 to about 31; a transmission metric (*T) of from about 23 to about 27; a haze metric (*H) of from about 10 to about 50; or a haze metric (*H) of from about 20 to about 40.
 
16. A coated article comprising:
a glass-ceramic substrate having a heat treated parting agent layer thereon, the parting agent layer prior to heat treatment being formed from an aqueous dispersion comprising boron nitride and a colloidal inorganic binding agent,
further wherein the coated glass-ceramic substrate has a surface layer effect of less than about 1 micron.