Tellurate joining glass having processing temperatures less than or equal to 420° C
The present invention relates to a glass, in particular a glass for the joining of glass panes for the production of vacuum insulating glasses at processing temperatures ≤420° C., to the corresponding composite glass, and to the corresponding glass paste. Moreover, the present invention relates to a vacuum insulating glass produced using the glass paste according to the invention, to the production process thereof, and to the use of the inventive glass and/or composite glass, and glass paste. The glass according to the invention is characterized in that it comprises the following components, in units of mol-%: V 2 O 5 5-58 mol-%, TeO 2 40-90 mol-%, and at least one oxide selected from ZnO 38-52 mol-%, or Al 2 O 3 1-25 mol %, or MoO 3 1-10 mol-%, or WO 3 1-10 mol-%, or a combination thereof.
1. A joining glass comprising the following components in units of mol-%:
V 2 O 5
5-54
mol-%,
TeO 2
40-89
mol-%, and
at least one oxide selected from the group consisting of
ZnO
38-52
mol-%,
Al 2 O 3
6-25
mol-%, and
a combination thereof.
2. The glass according to claim 1 , wherein the glass includes in units of mol-%:
V 2 O 5
6-33 mol-%,
TeO 2
42-57 mol-%, and
at least one oxide selected from the group consisting of
ZnO
38-52 mol-%,
Al 2 O 3
6-25 mol-%,
and
a combination thereof.
3. The glass according to claim 1 , wherein the glass includes in units of mol-%:
V 2 O 5
32.7 mol-%,
TeO 2
56.3 mol-%, and
Al 2 O 3
11.0 mol-%.
4. The glass according to claim 1 , wherein the glass has a glass transition temperature (Tg) in the range of 260-380° C.
5. The glass according to claim 1 , wherein the glass is doped with up to 20 wt % additional Al 2 O 3 particles.
6. The glass according to claim 1 , wherein the glass is further doped with at least one additional oxide selected from the group consisting of Cr 2 O 3 , Fe 2 O 3 , Ga 2 O 3 and ZnO, or with additional Al 2 O 3 particles doped with said at least one additional oxide.
7. The glass according to claim 5 , wherein the average grain size (d50) of Al 2 O 3 is 5-90 μm.
8. A composite glass comprising a glass according to claim 1 and 1 to 25 wt-% of at least one filling agent selected from the group consisting of zirconyl phosphates, dizirconium diorthophosphates, zirconium tungstates, zirconium vanadates, Zr 2 (WO 4 )(PO 4 ) 2 , aluminum phosphate, cordierite, eucryptite, keatite, (Hf,Zr)(V,P) 207 , NaZr(PO 4 ) 3 and alkaline earth zirconium phosphate.
9. The composite glass of claim 8 , wherein the average grain size (d50) of the filling agent is 5-30 μm.
10. A glass paste, comprising the glass of claim 1 and a screen printing medium.
11. A glass paste, comprising the composite glass of claim 8 and a screen printing medium.
12. A vacuum insulating glass comprising the glass of claim 1 .
13. A vacuum insulating glass comprising the composite glass of claim 8 .
14. An electrical or electronic device comprising the glass of claim 1 , wherein the electrical or electronic device is selected from the group consisting of sensors and electro-mechanical systems.
15. An automotive glass or glass paint comprising the glass of claim 1 .
16. A vacuum insulating glass comprising at least two glass substrates joined by the glass of claim 1 to define a cavity, wherein said cavity contains at least one solar cell.
17. A process for producing a vacuum insulating glass, comprising:
applying the glass paste of onto a glass substrate,
drying the paste on the glass substrate for 10 minutes at a temperature of 130° C.,
firing the glass substrate to a temperature of 300° C. for 30-60 minutes,
firing to a joining temperature of 325-390° C. for 1-5 minutes,
cooling to room temperature,
attaching a second glass substrate,
firing to a joining temperature of 325-390° C. for 10-15 minutes and
cooling to room temperature.
18. The process of claim 17 , wherein the firing is carried out by at least one selected from the group consisting of broadband IR heating, visible light heating, laser light heating, induction heating and microwave heating.
19. The glass according to claim 1 , wherein the glass includes in units of mol-%:
V 2 O 5
5-37
mol-%,
TeO 2
40-70
mol-%, and
at least one oxide selected from the group consisting of
ZnO
38-52
mol-%,
Al 2 O 3
6-25
mol-%, and
a combination thereof.
20. The glass according to claim 1 , wherein the glass includes in units of mol-%:
V 2 O 5
5-35
mol-%,
TeO 2
40-70
mol-%, and
at least one oxide selected from the group consisting of
ZnO
38-52
mol-%,
Al 2 O 3
6-25
mol-%, and
a combination thereof.
21. The glass according to claim 1 , wherein the glass includes in units of mol-%:
V 2 O 5
27.3
mol-%,
TeO 2
54.4
mol-%, and
Al 2 O 3
18.3
mol-%.
22. A joining glass comprising the following components in units of mol-%:
V 2 O 5
5-37
mol-%,
TeO 2
40-70
mol-%,
Al 2 O 3
6-25
mol-%, and
MoO 3
1-10
mol-%.
23. The glass according to claim 22 , wherein the glass includes in units of mol-%:
V 2 O 5
5-35
mol-%,
TeO 2
40-70
mol-%,
Al 2 O 3
6-25
mol-%, and
MoO 3
1-10
mol-%.