GB1276855A - Improvements in or relating to fused silica crucibles - Google Patents
Improvements in or relating to fused silica cruciblesInfo
- Publication number
- GB1276855A GB1276855A GB2985169A GB2985169A GB1276855A GB 1276855 A GB1276855 A GB 1276855A GB 2985169 A GB2985169 A GB 2985169A GB 2985169 A GB2985169 A GB 2985169A GB 1276855 A GB1276855 A GB 1276855A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crucible
- fused silica
- range
- mandrel
- silicon
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/14—Other methods of shaping glass by gas- or vapour- phase reaction processes
- C03B19/1453—Thermal after-treatment of the shaped article, e.g. dehydrating, consolidating, sintering
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/32—Burning methods
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Glass Melting And Manufacturing (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Silicon Compounds (AREA)
Abstract
1276855 Fused silica TEXAS INSTRUMENTS Inc 12 June 1969 [10 July 1968] 29851/69 Heading C1M A fused silica crucible, suitable for pulling monocrystalline silicon from a pure silicon melt, is made by supporting on a mandrel a crucible form produced by vapour phase flame hydrolysis of silicon tetrachloride, heating to a presintering temperature in the range 1000‹ to 1300‹ C. in vacuum to substantially free the silica of water and then heating at a sintering temperature in the range 1300‹ to 1500‹ C. and cooled in a helium atmosphere to form a transparent fused silica crucible. Preferably the mandrel is of graphite and has a generally cylindrical portion and a symmetrically curved closed end portion. The crucible form may consist of silicon dioxide particles of diameter in the range 0À01 to 0À1 micron. The presintering may be carried out at a pressure of 0À01 to 10 millimetres of mercury for such a time that the final crucible has an infra-red transmittance of substantially 63% at 2À73 microns.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US74387968A | 1968-07-10 | 1968-07-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1276855A true GB1276855A (en) | 1972-06-07 |
Family
ID=24990565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2985169A Expired GB1276855A (en) | 1968-07-10 | 1969-06-12 | Improvements in or relating to fused silica crucibles |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE1932626A1 (en) |
FR (1) | FR2017946A1 (en) |
GB (1) | GB1276855A (en) |
NL (1) | NL6909577A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011147906A1 (en) * | 2010-05-27 | 2011-12-01 | Heraeus Quarzglas Gmbh & Co. Kg | Method for producing a quartz glass crucible having a transparent inner layer made of synthetically produced quartz glass |
-
1969
- 1969-06-12 GB GB2985169A patent/GB1276855A/en not_active Expired
- 1969-06-23 NL NL6909577A patent/NL6909577A/xx unknown
- 1969-06-27 DE DE19691932626 patent/DE1932626A1/en active Pending
- 1969-07-10 FR FR6923470A patent/FR2017946A1/fr not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011147906A1 (en) * | 2010-05-27 | 2011-12-01 | Heraeus Quarzglas Gmbh & Co. Kg | Method for producing a quartz glass crucible having a transparent inner layer made of synthetically produced quartz glass |
Also Published As
Publication number | Publication date |
---|---|
DE1932626A1 (en) | 1970-06-18 |
FR2017946A1 (en) | 1970-05-29 |
NL6909577A (en) | 1970-01-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |