Automotive and architectural glass articles and laminates

Patent metadata

Field	Value
Publication number	US-2018141850-A1
Application number	US-201715817899-A
Country	US
Kind code	A1
Filing date	Nov 20, 2017
Priority date	Nov 22, 2016
Publication date	May 24, 2018
Grant date	—

Abstract

Embodiments of glass articles exhibiting a grey or a green tint are described. In one or more embodiments, the glass article comprises a glass composition including SiO 2 , Al 2 O 3 B 2 O 3 or MgO, a non-zero amount of alkali metal oxides (R 2 O), R 2 O—Al 2 O 3 in the range from about −0.5 to about 1.5; and up to 1 mol % Fe 2 O 3 . In one or more embodiments, the glass composition includes a ratio of R 2 O to Al 2 O 3 equal to or greater than about 1, Na 2 O, from 0-13 mol % MgO, at least one of K 2 O, SnO 2 and TiO 2 . Laminates including such glass articles and methods of making the glass articles are also described.

First claim

What is claimed is:

1 . A glass article comprising a glass composition, the glass composition comprising:
SiO 2 in an amount in the range from about 40 mol % to about 80 mol %; Al 2 O 3 in an amount greater than about 4 mol %; CaO in an amount less than about 6 mol %; B 2 O 3 or MgO, wherein MgO is present in an amount in the range from about 0 to about 13 mol %; a non-zero amount of alkali metal oxides (R 2 O), wherein the glass article exhibits a difference between R 2 O and the amount of Al 2 O 3 in the range from about −0.5 to about 1.5; and Fe expressed as Fe 2 O 3 , wherein Fe is present in an amount up to about 1 mol %.

2 . The glass article of claim 1 , wherein, when the glass article has a thickness of 0.7 mm, it exhibits an average total solar transmittance of about 88% or less, over a wavelength range from about 300 nm to about 2500 nm.

3 . The glass article of claim 1 , wherein the glass composition further comprises SnO 2 in an amount equal to or less than about 0.2 mol %.

4 . The glass article of claim 1 , wherein the glass composition further comprises a compositional ratio of R 2 O to Al 2 O 3 that is less than or equal to about 1.5.

5 . The glass article of claim 1 , wherein the glass article exhibits an average transmittance in the range from about 75% to about 85%, at a thickness of 0.7 mm, over a wavelength range from about 380 nm to about 780 nm.

6 . The glass article of claim 1 , wherein the compositional ratio of R 2 O to Al 2 O 3 is in the range from about 0.8 to about 1.5.

7 . The glass article of claim 1 , wherein the glass composition further comprises Li 2 O.

8 . The glass article of claim 1 , further exhibiting color coordinates in transmittance, under CIE L*a*b* (CIELAB) color space, under a D65 illuminant, wherein a* is in the range from about −2 to about 5, b* is in the range from about −1 to about 10, and L* is in the range from about 55 to about 98.

9 . The glass article of claim 1 , wherein the total amount of Fe, expressed as Fe 2 O 3 , is present in an amount in the range from about 0.1 mol % to about 1 mol %.

10 . The glass article of claim 1 , wherein the glass composition further comprises a total amount of Co, expressed as Co 3 O 4 , in an amount in the range from about 0.001 mol % to 0.007 mol %.

11 . The glass article of claim 1 , wherein the glass composition further comprises any one or more of NiO, V 2 O 5 , and TiO 2 .

12 . The glass article of claim 1 , wherein the glass composition comprises:
SiO 2 in an amount in the range from about 60 mol % to 75 mol %; Al 2 O 3 in an amount in the range from about 8 mol % to about 14 mol %; B 2 O 3 in an amount in the range from about 6 mol % to about 10 mol %; R 2 O in an amount in the range from about 6 mol % to about 14 mol %; and MgO in an amount in the range from about 0 mol % to about 2 mol %.

13 . The glass article of claim 1 , wherein the glass article is strengthened.

14 . A glass article comprising a glass composition, the composition comprising:
SiO 2 in an amount in the range from about 40 mol % to about 80 mol %; Al 2 O 3 in an amount greater than about 5% mol %; a total amount of alkali metal oxides (R 2 O), wherein a ratio of R 2 O to Al 2 O 3 equal to or greater than about 1; Na 2 O; MgO in an amount in the range from about 0 to about 13 mol %, at least one of K 2 O, SnO 2 and TiO 2 , wherein K 2 O is present in an amount greater than 1 mol % and, wherein TiO 2 is present in an amount less than about 2.5 mol %, and a ratio of Na 2 O to K 2 O greater than about 10.

15 . The glass article of claim 14 , wherein, when the glass article has a thickness of 0.7 mm, the glass article exhibits has an average total solar transmittance of about 88% or less, over a wavelength range from about 300 nm to about 2500 nm.

16 . The glass article of claim 14 , wherein the glass composition further comprises SnO 2 in an amount equal to or less than about 0.2 mol %.

17 . The glass article of claim 14 , wherein the glass composition is substantially free of Li 2 O.

18 . The glass article of claim 14 , wherein the glass composition further comprises Fe expressed as Fe 2 O 3 , wherein the total amount of Fe expressed as Fe 2 O 3 is in a range from about 0 mol % to about 1 mol %.

19 . The glass article of claim 14 , wherein, when the glass has a thickness of 0.7 mm, the glass article exhibits an average transmittance in the range from about 75% to about 85%, over a wavelength range from about 380 nm to about 780 nm.

20 . The glass article of claim 14 , wherein the ratio of R 2 O to Al 2 O 3 is in the range from about 1 to about 12.

21 . The glass article of claim 14 , further exhibiting color coordinates in transmittance, under CIE L*a*b* (CIELAB) color space, under a D65 illuminant, wherein a* is in the range from about −10 to about 0, b* is in the range from about −3 to about 10 and L* is in the range from about 80 to about 95.

22 . The glass article of claim 14 , wherein the glass composition further comprises any one or more of NiO, V 2 O 5 , Co expressed as Co 3 O 4 , and TiO 2 .

23 . The glass article of claim 14 , wherein the glass composition comprises:
SiO 2 in an amount in the range from about 60 mol % to 75 mol %; Al 2 O 3 in an amount in the range from about 6 mol % to about 12 mol %; R 2 O in an amount in the range from about 10 mol % to about 16 mol %; and MgO in an amount in the range from about 1 mol % to about 10 mol %.

24 . The glass article of claim 14 , wherein the glass composition is substantially free of B 2 O 3 .

25 . The glass article of claim 14 , wherein the glass article is strengthened.

26 . A laminate comprising:
a first glass layer; an interlayer disposed on the first glass layer; and a second glass layer disposed on the interlayer opposite the first glass layer, wherein either one of or both the first glass layer and the second glass layer comprises the glass article according to claim 1 .

27 . The laminate of claim 26 , wherein either one of or both the first glass layer and the second glass layer comprise a thickness less than 1.6 mm.

28 . The laminate of claim 26 , wherein either one of or both the first glass layer and the second glass layer is strengthened.

29 . A laminate comprising:
a first glass layer; an interlayer disposed on the first glass layer; and a second glass layer disposed on the interlayer opposite the first glass layer, wherein either one of or both the first glass layer and the second glass layer comprise the glass article according to claim 14 .

30 . The laminate of claim 29 , wherein either one of or both the first glass layer and the second glass layer comprise a thickness less than 1.6 mm.

31 . The laminate of claim 29 , wherein either one of or both the first glass layer and the second glass layer is strengthened.

32 . A method for forming a glass article comprising:
melting a batch composition at a temperature greater than about 1300° C. to form a molten glass, wherein the batch composition comprises an iron source and the glass composition of claim 1 ; and forming the molten glass into a sheet.

33 . The method of claim 32 , where the batch composition is melted in an environment comprising an o

Assignees

• Corning Inc

Inventors

• Dejneka Matthew John
• Gomez Sinue
• Tietz Moore Lisa Anne

Classifications

• B32B17/10788

  containing ethylene vinylacetate · CPC title

• B32B17/10761

  containing vinyl acetal · CPC title

• C03C2204/00

  Glasses, glazes or enamels with special properties · CPC title

• C03C3/091 Primary

  containing aluminium · CPC title

• C03C3/087

  containing calcium oxide, e.g. common sheet or container glass · CPC title