Alkali selenogermanate glasses

Patent metadata

Field	Value
Publication number	US-9475725-B2
Application number	US-201314443846-A
Country	US
Kind code	B2
Filing date	Nov 22, 2013
Priority date	Nov 28, 2012
Publication date	Oct 25, 2016
Grant date	Oct 25, 2016

Abstract

Selenogermanate, selenogallo- or selenoindo-germanate glasses that are modified by alkali metals, for example, Na or Li and, as such, are characterized by high alkali ion mobility or conductivity. Ionic conducting chalcogenide glasses have potential application as an electrolyte medium for solid state batteries.

First claim

What is claimed is:

1. A glass composition comprising in mole percent:
45 to 99 percent GeX 2 ;
0 to 50 percent Ga 2 X 3 , In 2 X 3 , or a combination thereof; and
0.5 to 50 percent M 2 X, wherein M is an alkali metal, wherein X is Se, and optionally S, Te or a combination thereof, wherein at least 50 mole percent of the total X is Se, and wherein the X content is in the range of from 70 to 130% of the stoichiometric amount.

2. A glass composition comprising in mole percent:
45 to 99 percent GeSe 2 ;
0 to 50 percent Ga 2 Se 3 , In 2 Se 3 , or a combination thereof; and
0.5 to 50 percent M 2 Se, wherein M is an alkali metal, and wherein the Se content is in the range of from 70 to 130% of the stoichiometric amount.

3. The glass composition according to claim 2 , comprising 1 to 40 percent Ga 2 Se 3 , In 2 Se 3 , or a combination thereof.

4. The glass composition according to claim 2 , comprising 1 to 40 percent M 2 Se.

5. The glass composition according to claim 2 , wherein M is Na.

6. The glass composition according to claim 2 , wherein (Ga and/or In)/M is greater than 1.

7. The glass composition according to claim 2 , wherein M/(Ga and/or In) is greater than 1.

8. The glass composition according to claim 2 , comprising 50 percent or greater GeSe 2 .

9. The glass composition according to claim 2 , comprising 60 percent or greater GeSe 2 .

10. The glass composition according to claim 2 , comprising more than one alkali metal.

11. The glass composition according to claim 2 , wherein the alkali metal is Li, Na, K, Rb, Cs or combinations thereof.

12. The glass composition according to claim 2 , wherein the alkali metal is Li, Na, or a combination thereof.

13. The glass composition according to claim 2 , further comprising one or more rare earth dopants.

14. The glass composition according to claim 2 , comprising 0 to 10 mole percent of rare earth dopants.

15. The glass composition according to claim 2 , comprising 0.5 to 10 mole percent of rare earth dopants.

16. The glass composition according to claim 2 , wherein the glass is transparent in the infra red spectrum.

17. A glass composition comprising in mole percent:
45 to 99 percent GeSe 2 ;
0.5 to 50 percent Ga 2 Se 3 , In 2 Se 3 , or a combination thereof; and
0.5 to 50 percent M 2 Se, wherein M is an alkali metal, and wherein the Se content is in the range of from 70 to 130% of the stoichiometric amount.

Assignees

• Corning Inc

Inventors

• Aitken Bruce Gardiner
• Currie Stephen Charles

Classifications

• C03C4/18

  for ion-sensitive glass · CPC title

• C03C4/10

  for infrared transmitting glass · CPC title

• C03C2204/00

  Glasses, glazes or enamels with special properties · CPC title

• C03C3/321 Primary

  Chalcogenide glasses, e.g. containing S, Se, Te · CPC title