Composition for producing glass solders for high-temperature applications and use thereof

Patent metadata

Field	Value
Publication number	US-9714190-B2
Application number	US-201314378819-A
Country	US
Kind code	B2
Filing date	Feb 11, 2013
Priority date	Feb 17, 2012
Publication date	Jul 25, 2017
Grant date	Jul 25, 2017

Abstract

A composition is for the manufacture of glass solders for high-temperature applications up to temperatures of approximately 1000° C., which composition, having no ZrO 2 , has SiO 2 at a proportion in the range from 48 mol-% to 62 mol %, Al 2 O 3 at a proportion in the range from 0.5 mol % to 6 mol %, B 2 O 3 at a proportion in the range 4 mol % to 12 mol %, BaO at a proportion in the range 12 mol % to 30 mol %, and either CaO at a proportion in the range from 2.5 mol % to 15 mol %, or an R 2 O 3 at a proportion in the range 0.5 mol % to 20 mol % where the R 2 O 3 is selected from La 2 O 3 , Y 2 O 3 , Sc 2 O 3 , and from a further oxide of a chemical element from the series of lanthanoids, wherein the SiO 2 :BaO ratio is in the range from 1.9 to 4.

First claim

The invention claimed is:

1. A composition for producing glass solders for high-temperature applications consisting of
SiO 2 having a proportion in the range from 48 mol % to 62 mol %;
Al 2 O 3 having a proportion in the range from 0.5 mol % to 6 mol %;
B 2 O 3 having a proportion in the range from 4 mol % to 12 mol %;
BaO having a proportion in the range from 12 mol % to 30 mol %; and
at least one oxide selected from the group consisting of CaO and R 2 O 3 , CaO having a proportion in the range from 2.5 mol % to 15 mol % and an R 2 O 3 having a proportion in the range from 0.5 mol % to 15 mol %;
wherein the R 2 O 3 is La 2 O 3 , Y 2 O 3 , Sc 2 O 3 , or a lanthanoid-series oxide,
and in so doing an SiO 2 :BaO ratio in the range of 1.9 to 4 is observed.

2. A composition in accordance with claim 1 , wherein the portion of BaO lies in the range from 16 mol % to 30 mol % and the at least one oxide is La 2 O 3 .

3. A composition in accordance with claim 1 , wherein the at least one oxide is CaO and the SiO 2 :BaO ratio is in the range from 1.9 to 3.5.

4. A composition in accordance with claim 1 , wherein the at least one oxide is La 2 O 3 and the SiO 2 :BaO ratio is in the range from 2.5 to 3.8.

5. A composition in accordance with claim 1 , wherein the at least one oxide is CaO and La 2 O 3 and the SiO 2 :BaO ratio is in the range from 2.6 to 4.

6. A composition for producing glass solders for high-temperature consisting of
SiO 2 having a proportion in the range from 48 mol % to 62 mol %;
Al 2 O 3 having a proportion in the range from 0.5 mol % to 6 mol %;
B 2 O 3 having a proportion in the range from 4 mol % to 12 mol %;
BaO having a proportion in the range from 12 mol % to 30 mol %;
at least one oxide selected from the group consisting of CaO and R 2 O 3 , CaO having a proportion in the range from 2.5 mol % to 15 mol % and an R 2 O 3 having a proportion in the range from 0.5 mol % to 15 mol %, wherein the R 2 O 3 is La 2 O 3 , Y 2 O 3 , Sc 2 O 3 , or a lanthanoid-series oxide; and
at least one further oxide selected from the group consisting of Ta 2 O 5 , Nb 2 O 5 , SnO 2 , GeO 2 , As 2 O 3 , and Sb 2 O 3 , where the proportion of one or more of these oxides is kept below 10 mol %;
and in so doing an SiO 2 :BaO ratio in the range of 1.9 to 4 is observed.

Assignees

• Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung
• Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E V

Inventors

• Schilm Jochen
• Kusnezoff Mihails
• Rost Axel

Classifications

• H01M8/0286

  Processes for forming seals · CPC title

• C03C2205/00

  Compositions applicable for the manufacture of vitreous enamels or glazes · CPC title

• H01M8/0282

  Inorganic material · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title

• C03C3/068 Primary

  containing rare earths · CPC title