US 12,281,036 B2
Methods for forming glass ceramic articles
I-Wen Chou, Taoyuan (TW); Carol Ann Click, Corning, NY (US); Shuo Cui, Burlington, MA (US); James Howard Edmonston, Corning, NY (US); Mathieu Gerard Jacques Hubert, Corning, NY (US); and Katherine Weber Kroemer, Horseheads, NY (US)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Filed by CORNING INCORPORATED, Corning, NY (US)
Filed on Jul. 9, 2020, as Appl. No. 16/924,777.
Claims priority of provisional application 62/873,819, filed on Jul. 12, 2019.
Prior Publication US 2021/0009459 A1, Jan. 14, 2021
Int. Cl. C03B 32/02 (2006.01)
CPC C03B 32/02 (2013.01) 16 Claims
OG exemplary drawing
 
1. A method for forming glass ceramic articles comprising:
heating a stack of glass sheets to a nucleation temperature to create a nucleated crystallizable stack of sheets;
maintaining the nucleation temperature for a first predetermined period of time;
heating the nucleated crystallizable stack of glass sheets to a crystallization temperature; and
maintaining the crystallization temperature for a second predetermined period of time to produce the glass-ceramic articles,
wherein:
the stack of glass sheets has a mass index of less than or equal to 35;
the number of glass sheets in the stack of glass sheets is greater or equal to 10;
at least three glass sheets in the stack of glass sheets are separated from an adjacent glass sheet by a parting agent layer;
the glass sheets have a thickness less than or equal to 1.11 mm,
the stack of glass sheets is configured to be placed on a setter plate during heating, and
the setter plate is supported by a carrier plate, the carrier plate having an open carrier design.