Ultra low melting glass frit and fibers

Patent metadata

Field	Value
Publication number	US-2016347644-A1
Application number	US-201515117954-A
Country	US
Kind code	A1
Filing date	Feb 11, 2015
Priority date	Feb 13, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

Disclosed herein are methods for forming low melting point glass fibers comprising providing a glass feedstock comprising a low melting point glass and melt-spinning the glass feedstock to produce glass fibers, wherein the glass transition temperature of the glass fibers is less than or equal to about 120% of the glass transition temperature of the glass feedstock. The disclosure also relates to method for forming low melting point glass frit further comprising jet-milling the glass fibers. Low melting point glass frit and fibers produced by the methods described above are also disclosed herein.

First claim

1 . A method for forming low melting point glass frit or fibers comprising:
providing a glass feedstock comprising a low melting point glass; and melt-spinning the glass feedstock to produce glass fibers; wherein the glass transition temperature of the glass fibers is less than or equal to about 120% of the glass transition temperature of the glass feedstock.

2 . The method according to claim 1 , wherein the low melting point glass has a glass transition temperature of less than about 450° C.

3 . The method according to claim 1 , wherein the low melting point glass is lead-free.

4 . The method according to claim 1 , wherein the glass feedstock comprises glass cullet chosen from Tick glass compositions and/or eCap glass compositions.

5 . The method according to claim 1 , wherein the glass fibers have a strand thickness of less than about 500 microns.

6 . The method according to claim 1 , wherein the glass fibers have a glass transition temperature of less than about 250° C.

7 . The method according to claim 1 , further comprising introducing the glass fibers into a jet mill to produce glass frit.

8 . The method according to claim 7 , wherein the jet mill comprises an inert gas atmosphere chosen from nitrogen, argon, helium, krypton, and/or xenon.

9 . The method according to claim 7 , wherein the glass frit has an average particle size diameter of less than about 150 microns.

10 . The method according to claim 7 , wherein the glass transition temperature of the glass frit is less than or equal to about 120% of the glass transition temperature of the glass feedstock.

11 . The method according to claim 7 , wherein the glass frit has a glass transition temperature of less than about 250° C.

12 . A glass fiber produced by the method according to claim 1 .

13 . A glass frit produced by the method according to claim 1 .

14 . A substantially lead-free glass fiber having a glass transition temperature of less than about 250° C. and a strand thickness of less than or equal to about 500 microns.

15 . The glass fiber according to claim 14 , wherein the glass fiber is produced by melt-spinning a low melting point glass.

16 . The glass fiber according to claim 15 , wherein the glass transition temperature of the glass fiber is less than or equal to about 120% of the glass transition temperature of the low melting point glass.

17 . A substantially lead-free glass frit having a glass transition temperature of less than about 250° C. and an average particle size diameter of less than or equal to 150 microns.

18 . The glass frit of claim 17 , wherein the glass frit is produced by melt-spinning a low melting point glass to produce glass fibers and jet-milling the glass fibers.

19 . The glass frit of claim 18 , wherein the glass transition temperature of the glass frit is less than or equal to about 120% of the glass transition temperature of the low melting point glass.

Assignees

• Corning Inc

Inventors

• Dabich Ii Leonard Charles
• Quesada Mark Alejandro
• Koval Shari Elizabeth
• Tick Paul Arthur

Classifications

• C03C13/00

  Fibre or filament compositions (manufacture of fibres or filaments C03B37/00) · 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

• C03C8/08

  containing phosphorus · CPC title

• C03B37/055

  by projecting onto and spinning off the outer surface of the rotating body · CPC title

• C03C8/06

  containing halogen · CPC title