Transparent tantalum oxide glass-ceramics and transparent aluminum tantalate glass-ceramics

Patent metadata

Field	Value
Publication number	US-11708298-B2
Application number	US-202117494996-A
Country	US
Kind code	B2
Filing date	Oct 6, 2021
Priority date	Feb 14, 2018
Publication date	Jul 25, 2023
Grant date	Jul 25, 2023

Abstract

A transparent glass-ceramic composition including: of the formula Ta2-xAlxO5-x where x is less than 1; of the formula AlTaO4; of the formula AlPO4; a mixture of AlTaO4 and AlPO4; or a mixture of the formula Ta2-xAlxO5-x, AlTaO4, and AlPO4. Also disclosed are transparent glass-ceramic compositions including, for example, a dopant as defined herein, or a supplemental metal oxide or metalloid oxide of MxOy, MxM′xOy, or a mixture thereof such as oxides of Nb, Ti, W, B, or Ga, as defined herein. Also disclosed are methods of making the disclosed transparent glass-ceramic compositions, and optical articles, optical components, and optical apparatus thereof.

First claim

What is claimed is:

1. A method of making a transparent glass-ceramic composition, comprising:
ceramming a precursor glass composition at a temperature in a range of from 900° C. to 1100° C. for a time in a range of from 0.5 hours to 10 hours,
wherein the precursor glass composition comprises:
65 to 75% SiO 2 ,
10 to 25% Al 2 O 3 ,
5 to 15% Ta 2 O 5 , and
3 to 10% P 2 O 5 , based on a 100 mol % total.

2. The method of making the transparent glass-ceramic composition of claim 1 , further comprising:
including a dopant in an amount of 1 mol % or less based on the 100 mol % of the precursor glass composition, and the dopant is selected from the group of a Cr oxide, a Ni oxide, a Co oxide, a rare earth oxide, or a mixture thereof.

3. The method of making the transparent glass-ceramic composition of claim 1 , wherein the dopant is an oxide selected from oxides of Cr, Ni, Co, V, Mn, Cu, Er, or a mixture thereof.

4. The method of making the transparent glass-ceramic composition of claim 1 , wherein the ceramming is conducted at a temperature in a range of from 900° C. to 950° C. for a time in a range of from 1 hour to 4 hours.

5. The method of making the transparent glass-ceramic composition of claim 1 , wherein the transparent glass-ceramic comprises a main crystalline phase of a formula of Ta 2-x Al x O 5-x , where x is less than 1 and greater than 0.001.

6. The method of making the transparent glass-ceramic composition of claim 1 , wherein the transparent glass-ceramic comprises crystalline phase comprising a mixture of AlTaO 4 and AlPO 4 .

7. The method of making the transparent glass-ceramic composition of claim 1 , further comprising including a dopant in an amount of 1 mol % or less based on the 100 mol % total of the precursor glass composition, and the dopant is selected from the group of a Cr oxide, a Ni oxide, a Co oxide, a rare earth oxide, a V oxide, a Mn oxide, a Cu oxide, an Er oxide, or mixtures thereof.

8. The method of making the transparent glass-ceramic composition of claim 1 , wherein precursor glass composition comprises:
65 to 75% SiO 2 ,
10 to 20% Al 2 O 3 ,
8 to 13% Ta 2 O 5 , and
4 to 9% P 2 O 5 , based on a 100 mol % total.

9. A method of making a transparent glass-ceramic composition, comprising:
ceramming a precursor glass composition at a temperature in a range of from 900° C. to 1100° C. for a time in a range of from 0.5 hours to 10 hours,
wherein the glass-ceramic composition has a crystalline phase comprising a mixture of AlTaO 4 and AlPO 4 .

10. The method of making the transparent glass-ceramic composition of claim 9 , further comprising:
including a dopant in an amount of 1 mol % or less based on the 100 mol % of the precursor glass composition, and the dopant is selected from the group of a Cr oxide, a Ni oxide, a Co oxide, a rare earth oxide, or a mixture thereof.

11. The method of making the transparent glass-ceramic composition of claim 9 , wherein the dopant is selected from oxides of Cr, Ni, Co, V, Mn, Cu, Er, or a mixture thereof.

12. The method of making the transparent glass-ceramic composition of claim 9 , wherein the ceramming is conducted at a temperature in a range of from 900° C. to 950° C. for a time in a range of from 1 hour to 4 hours.

13. The method of making the transparent glass-ceramic composition of claim 9 , wherein the precursor glass composition comprises:
10 to 25% Al 2 O 3 , and
5 to 15% Ta 2 O 5 , based on a 100 mol % total.

14. The method of making the transparent glass-ceramic composition of claim 9 , wherein the precursor glass composition comprises:
10 to 20% Al 2 O 3 , and
8 to 13% Ta 2 O 5 , based on a 100 mol % total.

15. The method of making the transparent glass-ceramic composition of claim 9 , wherein the precursor glass composition comprises:
10 to 25% Al 2 O 3 , and
4 to 7.5% Ta 2 O 5 , based on a 100 mol % total.

16. The method of making the transparent glass-ceramic composition of claim 9 , wherein the precursor glass composition comprises:
2 to 17% Al 2 O 3 , and
4 to 7.5% Ta 2 O 5 , based on a 100 mol % total.

Assignees

• Corning Inc

Inventors

• Aitken Bruce Gardiner
• Youngman Randall Eugene

Classifications

• C03C10/0009 Primary

  containing silica as main constituent · CPC title

• C03C10/0054

  containing PbO, SnO2, B2O3 · CPC title

• C03C2204/00

  Glasses, glazes or enamels with special properties · CPC title

• C03C3/097 Primary

  containing phosphorus, niobium or tantalum · CPC title

• C03C3/062

  with less than 40% silica by weight · CPC title