公开(公告)号：US20200017398A1

公开(公告)日：2020-01-16

申请号：US16510850

申请日：2019-07-12

Applicant: CORNING INCORPORATED

Inventor： Carol Ann Click ,  James Howard Edmonston ,  Qiang Fu ,  Jill Marie Hall ,  Mathieu Gerard Jacques Hubert ,  Dhananjay Joshi ,  Andrew Peter Kittleson ,  Katherine Weber Kroemer ,  Galan Gregory Moore ,  Rohit Rai ,  John Richard Ridge ,  John Robert Saltzer, JR. ,  Charlene Marie Smith ,  Erika Lynn Stapleton ,  Matthew Daniel Trosa ,  Ljerka Ukrainczyk ,  Shelby Kerin Wilson ,  Bin Yang ,  Zheming Zheng

IPC: C03C10/00 ,  C03C4/18 ,  H05K5/03

Abstract: A glass ceramic article including a lithium disilicate crystalline phase, a petalite crystalline phased, and a residual glass phase. The glass ceramic article has a warp (μm) 0.91×10(2-0.03t) of electromagnetic radiation wavelengths from 450 nm to 800 nm, where t is the thickness of the glass ceramic article in mm.

公开(公告)号：US20200017395A1

公开(公告)日：2020-01-16

申请号：US16511171

申请日：2019-07-15

Applicant: CORNING INCORPORATED

Inventor： Carol Ann Click ,  lndrajit Dutta ,  Ozgur Gulbiten ,  Jill Marie Hall ,  Mathieu Gerard Jacques Hubert ,  Andrew Peter Kittleson ,  Rohit Rai ,  John Robert Saltzer, JR. ,  Matthew Daniel Trosa ,  Zheming Zheng

IPC: C03B32/02

Abstract: A method for ceramming a glass article to a glass-ceramic includes placing a glass article into a heating apparatus, and heating the glass article to a first hold temperature at a first predetermined heating rate. The glass article is held at the first hold temperature for a first predetermined duration. The viscosity of the glass article is maintained within log viscosity ±1.0 poise during the first predetermined duration. The glass article is then heated from the first hold temperature to a second hold temperature at a second predetermined heating rate. The glass article is held at the second hold temperature for a second duration. A density of the glass article is monitored from the heating of the glass article from the first hold temperature through the second duration, and the second duration is ended when an absolute value of a density rate of change of the glass article is less than or equal to 0.10 (g/cm3)/min.

公开(公告)号：US20200017393A1

公开(公告)日：2020-01-16

申请号：US16511443

申请日：2019-07-15

Applicant: Corning Incorporated

Inventor： Jill Marie Hall ,  Mathieu Gerard Jacques Hubert ,  Andrew Peter Kittleson ,  John Robert Saltzer, JR.

IPC: C03B27/04 ,  C03C21/00

Abstract: Glass stack configurations including a carrier plate, setter plates, and glass sheets for thermal treatment of the glass sheets to form glass ceramic articles are provided. The glass stacking configurations and components described herein are selected to improve thermal uniformity throughout a glass stack during ceramming processes while maintaining or even reducing the stresses in the resultant glass ceramic article. Accordingly, the glass ceramic articles made according to the various embodiments described herein exhibit improved optical qualities and less warp than glass ceramic articles made according to conventional processes. Various embodiments of carrier plates, setter plates, parting agent compositions, and methods of stacking glass sheets are described.