Sodium-resistant joining glass and the use thereof

Patent metadata

Field	Value
Publication number	US-9708212-B2
Application number	US-201414526672-A
Country	US
Kind code	B2
Filing date	Oct 29, 2014
Priority date	Nov 26, 2013
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

The sodium-resistant joining glass ( 1 ) is substantially free of ZrO 2 and is based on a SiO 2 —B 2 O 3 —Na 2 O—Al 2 O 3 glass system. It is suitable for producing a joint of a metal and/or ceramic component with a further joining component ( 2, 3, 4 ) using the joining glass ( 1 ). Feedthrough-devices ( 20 ) using the joining glass ( 1 ) as fixing material are also disclosed.

First claim

I claim:

1. A joining glass ( 1 ) that is free of ZrO 2 except for at most impurities and that comprises, in % by weight based on oxide content:

SiO 2
40-44

B 2 O 3
26-30

Na 2 O
 5-15

Al 2 O 3
17-25

Σ MO
  0-<2,

wherein MO represents, individually or in any combination, CaO and/or SrO and/or BaO.

2. The joining glass ( 1 ) according to claim 1 , additionally comprising, individually or in any combination, in % by weight based on oxide content:

ZnO
0-5

TiO 2
0-5

SnO 2
0-5

MgO
  0-15.

3. The joining glass ( 1 ) according to claim 1 , which has a coefficient of linear thermal expansion α 20-300° C. in a temperature range of 20 to 300° C. of from 5.5×10 −6 K −1 to 10.5×10 −6 K −1 .

4. The joining glass ( 1 ) according to claim 1 , which has a coefficient of linear thermal expansion α 20-300° C. in a temperature range of 20 to 300° C. of from 5.5×10 −6 K −1 to 8.5×10 −6 K −1 .

5. The joining glass ( 1 ) according to claim 1 , which has a coefficient of linear thermal expansion α 20-300° C. in a temperature range of 20 to 300° C. of from 6.0×10 −6 K −1 to 8.0×10 −6 K −1 .

6. The joining glass ( 1 ) according to claim 1 , additionally comprising up to 30% by volume of an oxidic filler for setting or adjusting thermal expansion behaviour, corrosion resistance and/or flow behaviour.

7. The joining glass ( 1 ) according to claim 6 , wherein the filler is in the form of particles and/or fibres.

8. A joint between a first joining component ( 2 ) and a second joining component ( 3 , 4 , 41 ), said joint comprising a joining glass ( 1 ),
wherein the joining glass ( 1 ) bonds a joining area of the first joining component ( 2 ) to a joining area of the second joining component ( 3 , 4 , 41 );
wherein said joining glass ( 1 ) is free of ZrO 2 except for at most impurities and comprises, in % by weight based on oxide content:

SiO 2
40-44

B 2 O 3
26-30

Na 2 O
 5-15

Al 2 O 3
17-25

Σ MO
  0-<2;

and
wherein MO represents, individually or in any combination, CaO and/or SrO and/or BaO.

9. The joint according to claim 8 , wherein the first joining component ( 2 ) comprises a ceramic at least at the joining area thereof and the second joining component ( 3 , 4 , 41 ) comprises a metal and/or a ceramic at least at the joining area thereof.

10. The joint according to claim 9 , wherein the ceramic at the joining area of the first joining component ( 2 ) and/or at the joining area of the second joining component ( 3 , 4 , 41 ) is selected from the group consisting of alumina, α-alumina, μ-alumina, μ″-alumina and sodium super ionic conductor (NASICON).

11. The joint according to claim 9 , wherein the metal of the second joining component ( 41 ) has a coefficient of linear thermal expansion α 20-300° C. which in a temperature range is greater than or equal to a coefficient of linear thermal expansion α 20-300° C. of the ceramic in said temperature range.

12. A joint between a first joining component ( 2 ) and a second joining component ( 3 , 4 , 41 ), said joint comprising a joining glass ( 1 ),
wherein the joining glass ( 1 ) bonds a joining area of the first joining component ( 2 ) to a joining area of the second joining component ( 3 , 4 , 41 );

wherein the first joining component ( 2 ) comprises a metal at least at the joining area thereof and the second joining component ( 3 , 4 , 41 ) comprises a metal at least at the joining area thereof;
wherein said joining glass ( 1 ) is free of ZrO 2 except for at most impurities and comprises, in % by weight based on oxide content:

SiO 2
40-50

B 2 O 3
>25-30 

Na 2 O
 5-15

Al 2 O 3
17-25

Σ MO
  0-<2;

and
wherein MO represents, individually or in any combination, CaO and/or SrO and/or BaO.

13. The joint according to claim 12 , wherein the metal ( 41 ) of the second joining component has a coefficient of linear thermal expansion α 20-300° C. >8×10 −6 K −1 .

14. An electrochemical energy storage and/or energy generation unit comprising at least one joint according to claim 8 .

15. A sodium-sulphur battery or sodium-metal chloride battery comprising at least one joint according to claim 8 .

16. An electrical feedthrough-device ( 20 ) comprising at least one joint that bonds a joining area of a first joining component ( 2 ) to a joining area of a second joining component ( 3 , 4 , 41 ), said joint comprising a joining glass;
wherein said joining glass ( 1 ) is free of ZrO 2 except for at most impurities and comprises, in % by weight based on oxide

Assignees

• Schott Ag

Inventors

• Suffner Jens

Classifications

• H01M10/39

  working at high temperature · CPC title

• Y10T403/477

  Fusion bond, e.g., weld, etc. · CPC title

• G21C13/02

  Details · CPC title

• C03C2204/00

  Glasses, glazes or enamels with special properties · CPC title

• C04B37/005

  consisting of glass or ceramic material · CPC title