Lead-free sealing glass and manufacture method thereof

Patent metadata

Field	Value
Publication number	US-9902646-B2
Application number	US-201615094165-A
Country	US
Kind code	B2
Filing date	Apr 8, 2016
Priority date	Jul 1, 2015
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A lead-free sealing glass and a manufacture method thereof are provided. The lead-free sealing glass includes: 30 wt %-60 wt % of SiO 2 , 10 wt %-30 wt % of BaO, 1 wt %-5 wt % of Na 2 O, 1 wt %-10 wt % of K 2 O, 2 wt %-10 wt % of V 2 O 5 , 5 wt %-10 wt % of CaO, 1 wt %-5 wt % of Al 2 O 3 , 0 wt %-5 wt % of B 2 O 3 , 1 wt %-3 wt % of Fe 2 O 3 , and 0-5 wt % of alkaline earth metal oxide.

First claim

What is claimed is:

1. A lead-free sealing glass, comprising: 30 wt %-60 wt % of SiO 2 , 10 wt %-30 wt % of BaO, 1 wt %-5 wt % of Na 2 O, 1 wt %-10 wt % of K 2 O, 2 wt %-10 wt % of V 2 O 5 , 5 wt %-10 wt % of CaO, 1 wt %-5 wt % of Al 2 O 3 , 0 wt %-5 wt % of B 2 O 3 , 1 wt %-3 wt % of Fe 2 O 3 , and 0 wt %-5 wt % of alkaline earth metal oxide selected from the group consisting of SrO and MgO.

2. The lead-free sealing glass according to claim 1 , comprising: 40 wt %-50 wt % of SiO 2 , 15 wt %-25 wt % of BaO, 1.5 wt %-4.5 wt % of Na 2 O, 4 wt %-9.3 wt % of K 2 O, 3 wt %-8.7 wt % of V 2 O 5 , 5.5 wt %-9 wt % of CaO, 1.9 wt %-4 wt % of Al 2 O 3 , 2.5-3.7 wt % of B 2 O 3 , 1.7 wt %-2.8 wt % of Fe 2 O 3 , and greater than 0 wt % to less than or equal to 5 wt % of alkaline earth metal oxide selected from the group consisting of SrO and MgO.

3. The lead-free sealing glass according to claim 1 , comprising: 34 wt %-55.5 wt % of SiO 2 , 13 wt %-28.9 wt % of BaO, 1.3 wt %-4.8 wt % of Na 2 O, 3.2 wt %-8.8 wt % of K 2 O, 4 wt %-8.1 wt % of V 2 O 5 , 5.9 wt %-8.1 wt % of CaO, 1.5 wt %-3.3 wt % of Al 2 O 3 , 1.4 wt %-2.8 wt % of B 2 O 3 , 1.3 wt %-2 wt % of Fe 2 O 3 , and greater than 0 wt % to less than or equal to 5 wt % of alkaline earth metal oxide selected from the group consisting of SrO and MgO.

4. The lead-free sealing glass according to claim 1 , comprising: 50.9 wt %-55.5 wt % of SiO 2 , 13.2 wt %-21.6 wt % of BaO, 3.5 wt %-4.5 wt % of Na 2 O, 3.2 wt %-6 wt % of K 2 O, 4 wt %-4.8 wt % of V 2 O 5 , 7.1 wt %-8.1 wt % of CaO, 2.5 wt %-5 wt % of Al 2 O 3 , 1.4 wt %-2.8 wt % of B 2 O 3 , 1.4 wt %-2 wt % of Fe 2 O 3 , 0.9 wt %-1.2 wt % of SrO, and 0.8 wt %-2.1 wt % of MgO.

5. The lead-free sealing glass according to claim 1 , comprising: 34 wt %-45 wt % of SiO 2 , 26.2 wt %-28.9 wt % of BaO, 1.3 wt %-4.8 wt % of Na 2 O, 5.8 wt %-8.8 wt % of K 2 O, 7.2 wt %-8.1 wt % of V 2 O 5 , 5.9 wt %-6 wt % of CaO, 1.5 wt %-3.3 wt % of Al 2 O 3 , 2 wt %-2.6 wt % of B 2 O 3 , 1.3 wt %-1.8 wt % of Fe 2 O 3 , 1.8 wt %-2.1 wt % of SrO, and 0.5 wt %-1.1 wt % of MgO.

6. The lead-free sealing glass according to claim 1 , comprising: 41 wt % of SiO 2 , 25.3 wt % of BaO, 4.6 wt % of Na 2 O, 7.5 wt % of K 2 O, 7.2 wt % of V 2 O 5 , 6.5 wt % of CaO, 3 wt % of Al 2 O 3 , 2.1 wt % of B 2 O 3 , 1.5 wt % of Fe 2 O 3 and 1.3 wt % of SrO.

7. The lead-free sealing glass according to claim 1 , comprising: 47 wt % of SiO 2 , 19.3 wt % of BaO, 3.6 wt % of Na 2 O, 8.4 wt % of K 2 O, 7.3 wt % of V 2 O 5 , 5.4 wt % of CaO, 4.1 wt % of Al 2 O 3 , 3.1 wt % of B 2 O 3 and 1.8 wt % of Fe 2 O 3 .

8. The lead-free sealing glass according to claim 1 , wherein the lead-free sealing glass has a softening temperature of 650° C.-750° C., an expansion coefficient α of 70×10 −7 /° C.-110×10 −7 /° C., a temperature T k-100 of equal to or greater than 350° C. given a volume resistivity of 10 8 Ω·cm, and a water-resistant chemical stability of equal to or greater than a second level.

9. A manufacture method of a lead-free sealing glass, comprising: mixing, melting and cooling 30 wt %-60 wt % of SiO 2 , 10 wt %-30 wt % of BaO, 1 wt %-5 wt % of Na 2 O, 1 wt %-10 wt % of K 2 O, 2 wt %-10 wt % of V 2 O 5 , 5 wt %-10 wt % of CaO, 1 wt %-5 wt % of Al 2 O 3 , 0 wt %-5 wt % of B 2 O 3 , 1 wt %-3 wt % of Fe 2 O 3 , and 0-5 wt % of alkaline earth metal oxide selected from the group consisting of SrO and MgO to obtain the lead-free sealing glass.

10. The manufacture method of lead-free sealing glass according to claim 9 , comprising: mixing, melting and cooling 40 wt %-50 wt % of SiO 2 , 15 wt %-25 wt % of BaO, 1.5 wt %-4.5 wt % of Na 2 O, 4 wt %-9.3 wt % of K 2 O, 3 wt %-8.7 wt % of V 2 O 5 , 5.5 wt %-9 wt % of CaO, 1.9 wt %-4 wt % of Al 2 O 3 , 2.5-3.7 wt % of B 2 O 3 , 1.7 wt %-2.8 wt % of Fe 2 O 3 , and greater than 0 wt %-5 wt % of alkaline earth metal oxide selected from the group consisting of SrO and MgO to obtain the lead-free sealing glass.

11. The manufacture method of lead-free sealing glass according to claim 9 , comprising: mixing, melting and cooling 34 wt %-55.5 wt % of SiO 2 , 13 wt %-28.9 wt % of BaO, 1.3 wt %-4.8 wt % of Na 2 O, 3.2 wt %-8.8 wt % of K 2 O, 4 wt %-8.1 wt % of V 2 O 5 , 5.9 wt %-8.1 wt % of CaO, 1.5 wt %-3.3 wt % of Al 2 O 3 , 1.4-2.8 wt % of B 2 O 3 , 1.3 wt %-2 wt % of Fe 2 O 3 , and greater than 0 wt %-5 wt % of alkaline earth metal oxide selected from the group consisting of SrO and MgO to obtain the lead-free sealing glass.

12. The manufacture method of lead-free sealing glass according to claim 9 , comprising: mixing, melting and cooling 50.9 wt %-55.5 wt % of SiO 2 , 13.2 wt %-21.6 wt % of BaO, 3.5 wt %-4.5 wt % of Na 2 O, 3.2 wt %-6 wt % of K 2 O, 4 wt %-4.8 wt % of V 2 O 5 , 7.1 wt %-8.1 wt % of CaO, 2.5 wt %-5 wt % of Al 2 O 3 , 1.4 wt %-2.8 wt % of B 2 O 3 , 1.4 wt %-2 wt % of Fe 2 O 3 , 0.9 wt %-1.2 wt % of SrO, and 0.8 wt %-2.1 wt % of MgO to obtain the lead-free sealing glass.

13. The manufacture method of lead-free sealing glass according to claim 9 , comprising: mixing, melting and cooling 34 wt %-45 wt % of SiO 2 , 26.2 wt %-28.9 wt % of BaO, 1.3 wt %-4.8 wt % of Na 2 O, 5.8 wt %-8.8 wt % of K 2 O, 7.2 wt %-8.1 wt % of V 2 O 5 , 5.9 wt %-6 wt % of CaO, 1.5 wt %-3.3 wt % of Al 2 O 3 , 2 wt %-2.6 wt % of B 2 O 3 , 1.3 wt %-1.8 wt % of Fe 2 O 3 , 1.8 wt %-2.1 wt % of SrO, and 0.5 wt %-1.1 wt % of MgO to obtain the lead-free sealing glass.

14. The manufacture method of lead-free sealing glass according to claim 9 , comprising: mixing, melting and cooling 41 wt % of SiO2, 25.3 wt % of BaO, 4.6 wt % of Na 2 O, 7.5 wt % of K 2 O, 7.2 wt % of V 2 O 5 , 6.5 wt % of CaO, 3 wt % of Al 2 O 3 , 2.1 wt % of B 2 O 3 , 1.5 wt % of Fe 2 O 3 and 1.3 wt % of SrO to obtain the lead-free sealing glass.

15. The manufacture method of lead-free sealing glass according to claim 9 , comprising: mixing, melting and cooling 47 wt % of SiO2, 19.3 wt % of BaO, 3.6 wt % of Na 2 O, 8.4 wt % of K 2 O, 7.3 wt % of V 2 O 5 , 5.4 wt % of CaO, 4.1 wt % of Al 2 O 3 , 3.1 wt % of B 2 O 3 and 1.8 wt % of Fe 2 O 3 to obtain the lead-free sealing glass.

16. The manufacture method of lead-free sealing glass according to claim 9 , wherein the melting is performed at 1450° C.-1600° C., and the melting is performed for 8 h-15 h.

Assignees

• Boe Technology Group Co Ltd
• K Tronics Suzhou Tech Co Ltd

Inventors

• Lu Kejun
• Qin Guobin

Classifications

• C03C2205/00

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

• C03C8/02 Primary

  Frit compositions, i.e. in a powdered or comminuted form · CPC title

• C03C3/064

  containing boron · CPC title

• C03C8/24

  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

• C03C3/091

  containing aluminium · CPC title