Vitreous or at least partly crystallised sealing material, joint connection, barrier layer, and layer system comprising the sealing material and integration thereof into components

Patent metadata

Field	Value
Publication number	US-10214442-B2
Application number	US-201615136244-A
Country	US
Kind code	B2
Filing date	Apr 22, 2016
Priority date	Apr 22, 2015
Publication date	Feb 26, 2019
Grant date	Feb 26, 2019

Abstract

Vitreous or at least partly crystallized sealing material is provided. The sealing material is from the system SiO 2 —B 2 O 3 —CaO—MgO, which is free from BaO and/or SrO and which has an improved coefficient of thermal expansion and improved crystallization properties. The sealing material is employed to produce joint connections, electrical feedthroughs, and/or as a barrier layer.

First claim

What is claimed is:

1. A vitreous or at least partly crystallised sealing material, comprising:
a composition comprising (in mol %, based on oxide):

SiO 2
25-45;

B 2 O 3
5-less than 20;

Al 2 O 3
0-5;

CaO
4-30;

MgO
greater than 30-40;

CeO 2
0-10;

La 2 O 3
0-10;

Y 2 O 3
0-10;

TiO 2
0-10;

ZrO 2
0-10;

SnO 2
0-10;

HfO 2
0-10; and

R 2 O 3
0-10,

wherein R 2 O 3 is an oxide selected, individually or in any desired combination, from a group consisting of Ga 2 O 3 , In 2 O 3 , Dy 2 O 3 , Yb 2 O 3 , and any combinations thereof, and
wherein the composition is free from BaO and SrO apart from at most impurities.

2. The sealing material of claim 1 , further comprising a coefficient of thermal expansion in the at least partly crystallised state of α (20-700) ≥10.0·10 −6 K −1 .

3. The sealing material of claim 1 , wherein the composition comprises (in mol %, based on oxide):

SiO 2
25-45;

B 2 O 3
5-18;

Al 2 O 3
0-5;

CaO
greater than 15-30;

MgO
greater than 30-40;

CeO 2
0-10;

La 2 O 3
0-10;

Y 2 O 3
0-10;

TiO 2
0-10;

ZrO 2
0-10;

SnO 2
0-10;

HfO 2
0-10; and

R 2 O 3
0-10.

4. The sealing material of claim 1 , wherein the composition comprises (in mol %, based on oxide):

SiO 2
25-less than 35;

B 2 O 3
5-less than 20;

Al 2 O 3
0-5;

CaO
4-less than 15;

MgO
greater than 30-40;

CeO 2
0-10;

La 2 O 3
0-10;

Y 2 O 3
0-10;

TiO 2
0-10;

ZrO 2
0-10;

SnO 2
0-10;

HfO 2
0-10; and

R 2 O 3
0-10.

5. The sealing material of claim 1 , wherein the composition has a lower limit of B 2 O 3 that is 7% (in mol %, based on oxide).

6. The sealing material of claim 1 , wherein the composition comprises (in mol %, based on oxide), individually or in any combination,

Al 2 O 3
0-less than 2.1;

Assignees

• Schott Ag

Inventors

• Suffner Jens

Classifications

• C03C8/24 Primary

  Fusion seal compositions being frit compositions having non-frit additions, i.e. for use as seals between dissimilar materials, e.g. glass and metal; Glass solders · CPC title

• C04B2237/406

  Iron, e.g. steel · CPC title

• C03C10/0054

  containing PbO, SnO2, B2O3 · CPC title

• C04B2237/10

  Glass interlayers, e.g. frit or flux · CPC title

• C04B37/005

  consisting of glass or ceramic material · CPC title