Glass-ceramic articles, compositions, and methods of making the same

Patent metadata

Field	Value
Publication number	US-11370693-B2
Application number	US-202016750570-A
Country	US
Kind code	B2
Filing date	Jan 23, 2020
Priority date	Jan 28, 2019
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

A glass-ceramic article that includes an article having a glass-ceramic composition, the composition including:SiO2 from about 45% to about 65%,Al2O3 from about 14% to about 28%,TiO2 from about 2% to about 4%,ZrO2 from about 3% to about 4.5%,MgO from about 4.5% to about 12%, andZnO from about 0.1 to about 4% (by weight of oxide).The article can include a coefficient of thermal expansion (CTE) of about 20×10−7 K−1 to about 160×10−7 K−1, as measured over a temperature range from 25° C. to 300° C.

First claim

What is claimed is:

1. A glass-ceramic article, comprising:
an article having a glass-ceramic composition, the composition comprising:
SiO 2 from about 45% to about 65%,
Al 2 O 3 from about 14% to about 28%,
TiO 2 from about 2% to about 4%,
ZrO 2 from about 3% to about 4.5%,
MgO from about 4.5% to about 12%, and
ZnO from about 0.1 to about 4% (by weight of oxide);

wherein the article comprises a coefficient of thermal expansion (CTE) of about 20×10 −7 K −1 to about 160×10 −7 K −1 , as measured over a temperature range from 25° C. to 300° C.,
wherein the article further comprises a β-quartz crystalline phase and an α-quartz crystalline phase, and
wherein the article is characterized by a range of ratios of the α-quartz crystalline phase to the β-quartz crystalline phase, the range of ratios defined by a lower end of about 0.3:1 and an upper end of about 16:1.

2. The glass-ceramic article of claim 1 , wherein the article is characterized by a coefficient of thermal expansion (CTE) range defined from a lower end to an upper end, and including intermediate values between the lower end and the upper end, as measured over a temperature range from 25° C. to 300° C., and further wherein the lower end is about 30×10 −7 K −1 and the upper end is about 160×10 −7 K −1 .

3. The glass-ceramic article according to claim 1 , wherein the article further comprises at least one of:
an optical transmittance of at least about 75% at a wavelength of 1060 nm, as measured through a sample having a thickness of about 1 mm or less; and
an elastic modulus of about 80 GPa to about 140 GPa.

4. The glass-ceramic article according to claim 1 , wherein the composition further comprises at least one of:
BaO from greater than 0% to about 8% (by weight of oxide); and
SnO 2 from greater than 0% to about 2% (by weight of oxide).

5. The glass-ceramic article according to claim 1 , wherein the composition is substantially free of alkali metals.

6. A glass-ceramic article, comprising:
an article having a glass-ceramic composition, the composition comprising:
SiO 2 from about 45% to about 65%,
Al 2 O 3 from about 14% to about 28%,
TiO 2 from about 2% to about 4%,
ZrO 2 from about 3% to about 4.5%,
MgO from about 5% to about 12%, and
ZnO from about 0.1 to about 4% (by weight of oxide);

wherein the article further comprises a β-quartz crystalline phase and an α-quartz crystalline phase,
wherein the article is characterized by a range of ratios of the α-quartz crystalline phase to the β-quartz crystalline phase, the range of ratios defined by a lower end of about 0.3:1 and an upper end of about 16:1.

7. The glass-ceramic article according to claim 6 , wherein the article is further characterized by at least one additional crystalline phase comprising at least one of a spinel crystalline phase and a gahnite crystalline phase, and further wherein the at least one additional crystalline phase is present from about 8% to about 21% (by weight of oxide).

8. The glass-ceramic article according to claim 6 , wherein the article is further characterized by a coefficient of thermal expansion (CTE) range defined from a lower end to an upper end, as measured over a temperature range from 25° C. to 300° C., and further wherein the lower end is about 20×10 −7 K −1 and the upper end is from about 160×10 −7 K −1 .

9. The glass-ceramic article according to claim 6 , wherein the article further comprises at least one of:
an optical transmittance of at least about 75% at a wavelength of 1060 nm, as measured through a sample having a thickness of about 1 mm or less; and
an elastic modulus from about 80 GPa to about 140 GPa.

10. The glass-ceramic article according to claim 6 , wherein each of the β-quartz and α-quartz crystalline phases comprises a ratio of aluminum to silicon, the ratio in the β-quartz crystalline phase greater than the ratio in the α-quartz crystalline phase.

11. An electronic device, comprising:
a substrate, the substrate comprising the glass-ceramic according to claim 6 .

12. A method of making a glass-ceramic article, comprising:
forming a glass-ceramic precursor having a composition comprising:
SiO 2 from about 45% to about 65%,
Al 2 O 3 from about 14% to about 28%,
TiO 2 from about 2% to about 4%,
ZrO 2 from about 3% to about 4.5%,
MgO from about 5% to about 12%, and
ZnO from about 0.1 to about 4% (by weight of oxide); and

heating the glass-ceramic precursor to form a glass-ceramic article,
wherein the article comprises a coefficient of thermal expansion (CTE) of about 20×10 −7 K −1 to about 160×10 −7 K −1 , as measured over a temperature range from 25° C. to 300° C. and wherein the article further comprises a β-quartz crystalline phase and an α-quartz crystalline phase, and wherein the article is characterized by a range of ratios of the α-quartz crystalline phase to the β-quartz crystalline phase, the range of ratios defined by a lower end of about 0.3:1 and an upper end of about 16:1.

13. The method according to claim 12 , wherein the article is further characterized by a coefficient of thermal expansion (CTE) range defined from a lower end to an upper end, as measured over a temperature range from 25° C. to 300° C., and further wherein the lower end is about 20×10 −7 K −1 and the upper end is about 160×10 −7 K −1 .

14. The method according to claim 12 , wherein the heating the glass-ceramic precursor comprises heating the glass-ceramic precursor at a first temperature for a first period of time, followed by heating the glass-ceramic precursor at a second temperature for a second period of time.

15. The method according to claim 14 , wherein the second period of time is based at least in part on forming the glass-ceramic article with the coefficient of thermal expansion (CTE) of about 20×10 −7 K −1 to about 160×10 −7 K −1 , as measured over a temperature range from 25° C. to 300° C.

16. The method according to claim 14 , wherein the second temperature is at least one of:
higher than the first temperature; and
from about 950° C. to about 1200° C.

17. The method of claim 14 , wherein the second period of time is based at least in part on forming the glass-ceramic article with the β-quartz crystalline phase and the α-quartz crystalline phase.

Assignees

• Corning Inc

Inventors

• Comte Marie Jacqueline Monique
• Dutta Indrajit
• Zhang Jian-Zhi Jay

Classifications

• C03C3/085 Primary

  containing an oxide of a divalent metal · CPC title

• C03C10/0045 Primary

  containing SiO2, Al2O3 and MgO as main constituents · CPC title