US4604118A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for synthesizing MgO--Al2 O3 --SiO2 glasses and ceramics
Assignee: Corning Glass Works
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Filing: 1985-08-13
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Granted: 1986-08-05
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Expires: 2005-08-13
Abstract
Abstract A vapor phase method for the synthesis of MgO--Al 2 O 3 --SiO 2 products, including MgO--Al 2 O 3 --SiO 2 glasses of optical quality, wherein SiCl 4 , aluminum halide, and organometallic magnesium vapors are oxidized by flame oxidation and the oxides collected and sintered to glass or ceramic products, is described. A added shield gas stream is provided during flame oxidation of the vapors to reduce or prevent MgCl 2 by-product formation at the burner and in the product.
Inventors
- 👤 Peter L. Bocko
- 👤 William J. Wein
- 👤 Charles E. Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:35
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/40; C23C16/401; C03; C03B; C03B19/00; C03B19/14; C03B19/1415; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/01413; C03B37/0142; C03B2201/00; C03B2201/06; C03B2201/30; C03B2201/32; C03B2201/54; C03B2207/00; C03B2207/04; C03B2207/06; C03B2207/08; C03B2207/12; C03B2207/20; C03B2207/26; C03B2207/28; C03B2207/30; C03B2207/32; C03B2207/80; C03B2207/85; C03B2207/86; C03B2207/87; C03B2207/90
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
143 words
A method for synthesizing a vapor deposited MgO--Al 2 O 3 --SiO 2 oxide product which comprises the steps of: (a) generating and supplying to a flame oxidation burner vapors of each of SiCl 4 , an aluminum halide, and a magnesium organometallic compound, the aluminum halide vapors and magnesium organometallic vapors being supplied in separate vapor streams; (b) injecting the vapors into an oxidizing combustion flame supported by the burner, the aluminum halide and organometallic magnesium vapors being expelled from the burners into the flame in separate vapor streams, and an interposing shield gas stream, free of both aluminum halide and magnesium organometallic vapors, being expelled into the flame between the streams containing the aluminum halide and magnesium organometallic vapors; and (c) collecting the MgO--Al 2 O 3 --SiO 2 particulate oxidation product resulting from combustion of the vapors by the flame.
Claim 2
Independent Claim
143 words
A method for synthesizing a vapor deposited MgO--Al 2 O 3 --SiO 2 oxide product which comprises the steps of: (a) generating and supplying to a flame oxidation burner vapors of each of SiCl 4 , an aluminum halide, and a magnesium organometallic compound, the aluminum halide vapors and magnesium organometallic vapors being supplied in separate vapor streams; (b) injecting the vapors into an oxidizing combustion flame supported by the burner, the aluminum halide and organometallic magnesium vapors being expelled from the burners into the flame in separate vapor streams, and an interposing shield gas stream, free of both aluminum halide and magnesium organometallic vapors, being expelled into the flame between the streams containing the aluminum halide and magnesium organometallic vapors; and (c) collecting the MgO--Al 2 O 3 --SiO 2 particulate oxidation product resulting from combustion of the vapors by the flame.
Claim 3
Dependent Claim
18 words
A method in accordance with claim 1 wherein the aluminum halide vapors consist essentially of AlCl 3 .
Claim 4
Dependent Claim
17 words
A method in accordance with claim 2 wherein the interposing shield gas stream comprises SiCl 4 vapors.
Claim 5
Dependent Claim
17 words
A method in accordance with claim 2 wherein the interposing shield gas stream consists essentially of oxygen.
Claim 6
Independent Claim
162 words
A method for synthesizing a vapor-deposited MgO--Al 2 O 3 --SiO 2 glass which comprises the steps of: (a) generating and supplying to a flame oxidation burner vapors of each of SiCl 4 , an aluminum halide, and a magnesium organometallic compound, the aluminum halide vapors and magnesium organometallic vapors being supplied in separate vapor streams; (b) injecting the vapors into an oxidizing combustion flame supported by the burner, the aluminum halide and organometallic magnesium vapors being expelled from the burners into the flame in separate vapor streams, and an interposing shield gas stream, free of both aluminum halide and magnesium organometallic vapors, being expelled into the flame between the streams containing the aluminum halide and magnesium organometallic vapors; and (c) collecting the MgO--Al 2 O 3 --SiO 2 particulate oxidation product resulting from combustion of the vapors by the flame; and (d) heating the collected particulate MgO--Al 2 O 3 --SiO 2 oxidation product to sinter it to a clear glass.
Claim 7
Independent Claim
162 words
A method for synthesizing a vapor-deposited MgO--Al 2 O 3 --SiO 2 glass which comprises the steps of: (a) generating and supplying to a flame oxidation burner vapors of each of SiCl 4 , an aluminum halide, and a magnesium organometallic compound, the aluminum halide vapors and magnesium organometallic vapors being supplied in separate vapor streams; (b) injecting the vapors into an oxidizing combustion flame supported by the burner, the aluminum halide and organometallic magnesium vapors being expelled from the burners into the flame in separate vapor streams, and an interposing shield gas stream, free of both aluminum halide and magnesium organometallic vapors, being expelled into the flame between the streams containing the aluminum halide and magnesium organometallic vapors; and (c) collecting the MgO--Al 2 O 3 --SiO 2 particulate oxidation product resulting from combustion of the vapors by the flame; and (d) heating the collected particulate MgO--Al 2 O 3 --SiO 2 oxidation product to sinter it to a clear glass.
Claim 8
Dependent Claim
17 words
A method in accordance with claim 5 wherein the aluminum halide consists essentially of AlCl 3 .
Claim 9
Dependent Claim
17 words
A method in accordance with claim 6 wherein the interposing shield gas stream comprises SiCl 4 vapors.
Claim 10
Dependent Claim
17 words
A method in accordance with claim 6 wherein the interposing shield gas stream consists essentially of oxygen.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |