US5541142A
Expired / Lapsed
US
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Method of making a color filter by precipitation of Cu2 O from a glass matrix
Assignee: Corning Inc
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Filing: 1995-07-31
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Granted: 1996-07-30
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Expires: 2015-07-31
Abstract
Abstract A non-photochromic colored glass containing crystals of precipitated cuprous oxide in a matrix of glass, the matrix glass consisting essentially of, in cation percent, 35-75% SiO 2 , 15-45% B 2 O 3 , 0-12% Al 2 O 3 , the Al 2 O 3 being less than 10% when the SiO 2 is over 55%, 0-5% ZrO 2 , 0-12% Li 2 O, 0-20% Na 2 O, 0-12% K 2 O, the sum Li 2 O+Na 2 O+K 2 O being 5-20%, 0-5% CaO+BaO+SrO, 0.4-1.75% Cu 2 O, 0-2% As 2 O 3 , 0-2% Sb 2 O 3 , 0-1% SnO 2 , the sum As 2 O 3 +Sb 2 O 3 +SnO 2 being 0.5-2%, characterized by 0.075≦R-value ≦0.65, where R-value= ##EQU1##
Inventors
- 👤 Roger J. Araujo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:55
CPC Classifications
C; C03; C03C; C03C14/00; C03C14/006; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091; C03C4/00; C03C4/02; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/905
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
124 words
A color filter containing crystals of precipitated cuprous oxide in a matrix glass, the matrix glass consisting essentially of, in cation percent, 35-75% SiO 2 , 15-45% B 2 O 3 , 0-12% Al 2 O 3 , 0-5% ZrO 2 , 0-12% Li 2 O, 0-20% Na 2 O, 0-12% K 2 O, 0-5% (CaO+BaO+SrO), 0.4-1.75% Cu 2 O, 0-2% As 2 O 3 , 0-2% Sb 2 O 3 , and 0-1% SnO 2 , wherein, the sum of (Li 2 O+Na 2 O+K 2 O) is 5-20%, the sum of (As 2 O 3 +Sb 2 O 3 +SnO 2 ) is 0.5-2%, and the Al 2 O 3 is less than 10% when the SiO 2 is greater than 55%.
Claim 2
Dependent Claim
124 words
A color filter containing crystals of precipitated cuprous oxide in a matrix glass, the matrix glass consisting essentially of, in cation percent, 35-75% SiO 2 , 15-45% B 2 O 3 , 0-12% Al 2 O 3 , 0-5% ZrO 2 , 0-12% Li 2 O, 0-20% Na 2 O, 0-12% K 2 O, 0-5% (CaO+BaO+SrO), 0.4-1.75% Cu 2 O, 0-2% As 2 O 3 , 0-2% Sb 2 O 3 , and 0-1% SnO 2 , wherein, the sum of (Li 2 O+Na 2 O+K 2 O) is 5-20%, the sum of (As 2 O 3 +Sb 2 O 3 +SnO 2 ) is 0.5-2%, and the Al 2 O 3 is less than 10% when the SiO 2 is greater than 55%.
Claim 3
Dependent Claim
19 words
A color filter according to claim 1 further comprising in weight percent, 0-0.25 Cl, 0-0.25 Br, and 0-2.0 F.
Claim 4
Dependent Claim
14 words
A color filter according to claim 1, further characterized by 0.075≦R-value≦0.65 where R-value= ##EQU3##
Claim 5
Independent Claim
46 words
A method of making a colored glass containing particles of crystalline cuprous oxide, the method comprising, combining sources of copper and polyvalent ions with a glass batch to form a glass matrix; melting the batch; and heating the glass to cause precipitation of the cuprous oxide.
Claim 6
Independent Claim
46 words
A method of making a colored glass containing particles of crystalline cuprous oxide, the method comprising, combining sources of copper and polyvalent ions with a glass batch to form a glass matrix; melting the batch; and heating the glass to cause precipitation of the cuprous oxide.
Claim 7
Dependent Claim
117 words
The method of claim 4, wherein the glass matrix consists essentially of, in cation percent, 35-75% SiO 2 , 15-45% B 2 O 3 , 0-12% Al 2 O 3 , 0-5% ZrO 2 , 0-12% Li 2 O, 0-20% Na 2 O, 0-12% K 2 O, 0-5% (CaO+BaO+SrO), 0.4-1.75% Cu 2 O, 0-2% As 2 O 3 , 0-2% Sb 2 O 3 , and 0-1% SnO 2 , wherein, the Al 2 O 3 is less than 10% when the SiO 2 is greater than 55%, the sum of (Li 2 O+Na 2 O+K 2 O) is 5-20%, and the sum of (As 2 O 3 +Sb 2 O 3 +SnO 2 ) is 0.5-2%.
Claim 8
Dependent Claim
19 words
The method of claim 5, wherein the glass is characterized by R-value in the range of 0.075≦R-value≦0.65 where ##EQU4##
Claim 9
Dependent Claim
21 words
The method of claim 4, wherein the glass matrix further comprises, in weight percent, 0-0.5 Cl, 0-0.5 Br, and 0-2.0 F.
Claim 10
Dependent Claim
22 words
The method of claim 4, wherein the cuprous oxide precipitate is characterized by particle size less than or equal to 250 angstroms.
Claim 11
Dependent Claim
41 words
A colored glass according to claim 4, wherein the glass is heated at a temperature in the range of 475° C. to 750° C., for a period of time in the range of 0.5 to 100 hours, to produce the color.
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