GB622530A - Improved manufacture of ultraviolet transmitting high silica glass articles - Google Patents
Improved manufacture of ultraviolet transmitting high silica glass articlesInfo
- Publication number
- GB622530A GB622530A GB7601/47A GB760147A GB622530A GB 622530 A GB622530 A GB 622530A GB 7601/47 A GB7601/47 A GB 7601/47A GB 760147 A GB760147 A GB 760147A GB 622530 A GB622530 A GB 622530A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vacuo
- march
- oxygen
- per cent
- article
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title abstract 3
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 2
- 239000011521 glass Substances 0.000 abstract 2
- 230000008018 melting Effects 0.000 abstract 2
- 238000002844 melting Methods 0.000 abstract 2
- 239000001301 oxygen Substances 0.000 abstract 2
- 229910052760 oxygen Inorganic materials 0.000 abstract 2
- 239000011148 porous material Substances 0.000 abstract 2
- 229910052785 arsenic Inorganic materials 0.000 abstract 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 abstract 1
- 238000007596 consolidation process Methods 0.000 abstract 1
- 239000000470 constituent Substances 0.000 abstract 1
- 239000006025 fining agent Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract 1
- 229910052753 mercury Inorganic materials 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/28—Compounds containing heavy metals
- A61K31/295—Iron group metal compounds
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/06—Glass compositions containing silica with more than 90% silica by weight, e.g. quartz
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Pharmacology & Pharmacy (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
622,530. Glass manufacture. CORNING GLASS WORKS. March 19, 1947, No. 7601. Convention date, March 28, 1946. [Class 56] A substantially pure silica article comprising a skeleton with intercommunicating sub-microscopic pores (formed by melting and shaping glass of a lower silica content and extracting the soluble constituents therefrom by lixiviation, e.g., as in Specification 442,526), is consolidated by heating to a temperature below its melting point while maintaining a partial pressure of oxygen in its pores at substantially zero. Tubes for medium pressure mercury arc lamps made in this way do not evolve gas internally in use, are transparent to u.v. light down to 2,540A (due to reduction of any residual Fe 2 O 3 to FeO), and if a vacuum is used as the means for eliminating the oxygen, are free from any arsenic (used as a fining agent) which might otherwise remain. An electric resistor type vacuum furnace may be used in which the article is heated slowly to 600-900‹C. in a reducing atmosphere, e.g. of 92 per cent N and 8 per cent H, held at about 1,000‹ in vacuo for half an hour, and then heated still in vacuo, to 1,225‹ to complete consolidation to a non-porous state.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US622530XA | 1946-03-28 | 1946-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB622530A true GB622530A (en) | 1949-05-03 |
Family
ID=22041226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7601/47A Expired GB622530A (en) | 1946-03-28 | 1947-03-19 | Improved manufacture of ultraviolet transmitting high silica glass articles |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB622530A (en) |
| NL (1) | NL67160C (en) |
-
0
- NL NL67160D patent/NL67160C/xx active
-
1947
- 1947-03-19 GB GB7601/47A patent/GB622530A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL67160C (en) |
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