Low melting glass compositions
View Patent ↗A glass composition comprising B 2 O 3 , Na 2 O, Al 2 O 3 , Li 2 O, TiO 2 , ZnO, Ta 2 O 5 , Nb 2 O 3 , BaO, ZrO 2 and SiO 2 , and devoid of lead, bismuth, and vanadium. Pastes comprising the glass composition and devices including seals comprising such pastes are contemplated.
1. A glass composition consisting of (a) 45-81 wt % B 2 O 3 , (b) 1-7 wt % Na 2 O, (c) 0.1-5 wt % Al 2 O 3 , (d) 0.1-2 wt % Li 2 O, (e) 0.5-6 wt % TiO 2 , (f) 0.1-9 wt % ZnO (g) 4-25 wt % BaO, and no lead, no bismuth and no vanadium.
2. The glass composition of claim 1 having a firing temperature less than 600° C.
3. The glass composition of claim 1 having a firing temperature less than 500° C.
4. The glass composition of claim 1 having a dilatometric softening temperature of 370 to 525° C.
5. The glass composition of claim 1 having a CTE of 7.0 to 8.0×10 −6 /° C.
6. A paste composition comprising an organic vehicle and the glass composition of claim 1 .
7. A device including a seal, the device formed by a method of heating a sealing material comprising:
a. providing at least two substrates,
b. providing a sealing material, comprising the glass composition of claim 1 ,
c. contacting the seal material to the at least two substrates, and
d. firing the seal material to a temperature of no greater than 600° C., whereby a seal between the substrates results.
8. The device of claim 7 , wherein the device and the seal form a cavity, and wherein an active layer selected from the group consisting of solar cell, solar cell contact, organic PV device, plasma display devices, nanocrystal display, electrochromic device, electrochromic material system, suspended particle device, micro-blind, liquid crystal device, smart window, switchable window, smart glass, eglass, LED, SED, FED, OLED, LCD, DLP, FLD, IMOD, TDEL, QDLED, TMOS, TPD, LCL, LPD, OLET, and combinations thereof is situated within the cavity.
9. An electronic device or circuit including a fired paste or thick film including the glass composition of claim 1 .
10. The electronic device or circuit of claim 9 , wherein the electronic device or circuit is selected from the group consisting of surge resistors, high-current high-power automotive electronics, automotive sensors, air bag deployment sensors, weight-sensors, anti-lock braking systems, defrosters, thick film circuitry on automotive windshields, solar cells, and solar panels.
11. A glass composition consisting of (a) 45-81 wt % B 2 O 3 , (b) 1-7 wt % Na 2 O, (c) 0.1-5 wt % Al 2 O 3 , (d) 0.1-2 wt % Li 2 O, (e) 0.5-6 wt % TiO 2 , (f) 0.1-9 wt % ZnO (g) 4-25 wt % BaO, and at least one of (h) 5-25 wt % Ta 2 O 5 , (i) 6-15 wt % Nb 2 O 3 , (j) 0.1-5 wt % ZrO 2 , and (k) 0.1-5 wt % SiO 2 and no lead, no bismuth and no vanadium.
12. The glass composition of claim 11 having a firing temperature less than 600° C.
13. The glass composition of claim 11 having a firing temperature less than 500° C.
14. The glass composition of claim 11 having a dilatometric softening temperature of 370 to 525° C.
15. The glass composition of claim 11 having a CTE of 7.0 to 8.0× 10 −6 /° C.
16. A paste composition comprising an organic vehicle and the glass composition of claim 11 .
17. A device including a seal, the device formed by a method of heating a sealing material comprising:
a. providing at least two substrates,
b. providing a sealing material, comprising the glass composition of claim 11 ,
c. contacting the seal material to the at least two substrates, and
d. firing the seal material to a temperature of no greater than 600° C., whereby a seal between the substrates results.
18. The device of claim 17 , wherein the device and the seal form a cavity, and wherein an active layer selected from the group consisting of solar cell, solar cell contact, organic PV device, plasma display devices, nanocrystal display, electrochromic device, electrochromic material system, suspended particle device, micro-blind, liquid crystal device, smart window, switchable window, smart glass, eglass, LED, SED, FED, OLED, LCD, DLP, FLD, IMOD, TDEL, QDLED, TMOS, TPD, LCL, LPD, OLET, and combinations thereof is situated within the cavity.
19. An electronic device or circuit including a fired paste or thick film including the glass composition of claim 11 .
20. The electronic device or circuit of claim 19 , wherein the electronic device or circuit is selected from the group consisting of surge resistors, high-current high-power automotive electronics, automotive sensors, air bag deployment sensors, weight-sensors, anti-lock braking systems, defrosters, thick film circuitry on automotive windshields, solar cells, and solar panels.