Tellurate Joining Glass Having Processing Temperatures Less Than Or Equal To 420°C

Abstract

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.sub.2O.sub.5 5-58 mol-%,Te0.sub.2 40-90 mol-%, and at least one oxide selected from ZnO 38-52 mol-%, or Al.sub.2O.sub.3 1-25 mol %, or MoO.sub.3 1-10 mol-%, or WO.sub.3 1-10 mol-%, or a combination thereof.

Claims

1-24. (canceled)

25. A joining glass comprising the following components in units of mol-%: TABLE-US-00007 V.sub.2O.sub.5  5-58 mol-%, TeO.sub.2 40-90 mol-%, and at least one oxide selected from the group consisting of ZnO 38-52 mol-%, Al.sub.2O.sub.3  1-25 mol-%, MoO.sub.3  1-10 mol-%, and WO.sub.3  1-10 mol-%.

26. The glass according to claim 25, comprising the following components in units of mol-%: TABLE-US-00008 V.sub.2O.sub.5  5-37 mol-%, TeO.sub.2 40-70 mol-%, and at least one oxide selected from the group consisting of ZnO 38-52 mol-%, Al.sub.2O.sub.3  6-25 mol-%, MoO.sub.3  1-10 mol-%, and WO.sub.3  1-10 mol-%.

27. The glass according to claim 25, comprising the following components in units of mol-%: TABLE-US-00009 V.sub.2O.sub.5  5-35 mol-%, TeO.sub.2 40-70 mol-%, and at least one oxide selected from the group consisting of ZnO 38-52 mol-%, Al.sub.2O.sub.3  6-25 mol-%, MoO.sub.3  1-10 mol-%, and WO.sub.3  1-10 mol-%.

28. The glass according to claim 25, comprising the following components in units of mol-%: TABLE-US-00010 V.sub.2O.sub.5  6-33 mol-%, TeO.sub.2 42-57 mol-%, and at least one oxide selected from the group consisting of ZnO 38-52 mol-%, and Al.sub.2O.sub.3  6-25 mol-%.

29. The glass according to claim 25, comprising the following components in units of mol-%: TABLE-US-00011 V.sub.2O.sub.5 32.7 mol-%, TeO.sub.2 56.3 mol-%, and Al.sub.2O.sub.3 11.0 mol-%.

30. The glass according to claim 25, wherein the glass has a glass transition temperature (Tg) in the range of 260-380° C.

31. The glass according to claim 25, wherein the glass is doped with up to 20 wt-% Al.sub.2O.sub.3 particles.

32. The glass according to claim 25, wherein the glass is doped with at least one oxide selected from the group consisting of Cr.sub.2O.sub.3, Fe.sub.2O.sub.3, Ga.sub.2O.sub.3 and ZnO, or with Al.sub.2O.sub.3 particles doped with said at least one oxide.

33. The glass of claim 31, wherein the average grain size (d50) of Al.sub.2O.sub.3 is 5-90 μm.

34. A composite glass comprising a glass according to claims 25 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.sub.2(WO.sub.4)(PO.sub.4).sub.2, aluminium phosphate, cordierite, eukryptite, keatite, (Hf,Zr)(V,P).sub.2O.sub.7, NaZr(PO.sub.4).sub.3, alkaline earth zirconium phosphates, and (Mg,Ca,Ba,Sr)Zr.sub.4P.sub.5O.sub.24.

35. The composite glass of claim 34 wherein the average grain size (d50) of the filling agent is 5-30 μm.

36. A glass paste, comprising the glass of claim 25 and a screen printing medium.

37. A glass paste, comprising the composite glass of claim 34 and a screen printing medium.

38. A vacuum insulating glass comprising the glass of claim 25.

39. A vacuum insulating glass comprising the composite glass of claim 34.

40. An electrical or electronic device comprising the glass of claim 25, wherein the electrical or electronic device is selected from the group consisting of sensors and electro-mechanical systems.

41. An automotive glass or glass paint comprising the glass of claim 25.

42. A vacuum insulating glass comprising at least two glass substrates joined by the glass of claim 25 to define a cavity, wherein said cavity contains at least one solar cell.

43. A process for producing a vacuum insulating glass, comprising: applying the glass paste of claim 37 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.

44. The process of claim 43, wherein the firing is carried out by at least one selected from the group consisting of broadband IR or visible light heating, laser light heating, induction heating and microwave heating.

Description

[0089] FIG. 1 shows that it is feasible to variably adapt the expansion coefficient (TEC) of the glasses. The special feature in this context is that the glasses tolerate high filling agent contents without deterioration of the wetting properties. Whereas the flow properties of high bismuth-containing glasses are clearly reduced already at filling agent contents of 5 wt-%, the glasses described presently allow expansion coefficients of less than 8.Math.10.sup.−6/K to be attained without difficulty without suffering any loss of wettability.

CHEMICAL RESISTANCE IN BOILING WATER

[0090] 2 g sample, example B (d50 approx. 6 μm, d90<50μm) was weighed into a 50-mL volumetric flask, fully deionized water was added to the mark, and this was homogenized. Subsequently, the volumetric flasks were exposed to a temperature of 98±0.5° C. in a heating bath for 60 min. After cooling, renewed homogenization, topping up to the mark, and a sedimentation period (20 min), the sample was filtered through a 0.45 μm filter.

[0091] Solubility in water [%]=0.4