GB1203342A - A mat article of single crystal alpha-alumina fibers - Google Patents
A mat article of single crystal alpha-alumina fibersInfo
- Publication number
- GB1203342A GB1203342A GB7003/68A GB700368A GB1203342A GB 1203342 A GB1203342 A GB 1203342A GB 7003/68 A GB7003/68 A GB 7003/68A GB 700368 A GB700368 A GB 700368A GB 1203342 A GB1203342 A GB 1203342A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fibres
- mat
- cover
- groups
- enmeshed
- 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
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title abstract 2
- 239000013078 crystal Substances 0.000 title abstract 2
- 239000000835 fiber Substances 0.000 title 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 4
- 239000004411 aluminium Substances 0.000 abstract 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 3
- 239000000155 melt Substances 0.000 abstract 3
- 239000000919 ceramic Substances 0.000 abstract 2
- 229910010293 ceramic material Inorganic materials 0.000 abstract 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000007769 metal material Substances 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- 229910052726 zirconium Inorganic materials 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
- C30B25/005—Growth of whiskers or needles
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/60—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape characterised by shape
- C30B29/62—Whiskers or needles
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Nonwoven Fabrics (AREA)
Abstract
1,203,342. α-Alumina whiskers. GENERAL TECHNOLOGIES CORP. 13 Feb., 1968, No. 7003/68. Heading CIA. A mat of interconnected groups of α-Al 2 O 3 single crystal fibres, each of said groups containing a plurality of fibres connected at a common point and having at least some of the fibres enmeshed with the fibres of another group or groups, the common points of the individual groups being spaced apart at one surface of the mat, the other surface of the mat being covered with the separate enmeshed fibres, is made by passing H 2 /water vapour over a melt of aluminium in a ceramic receptacle provided with a loosely fitting cover of ceramic material. The temperature of the melt may be 2200-3500‹ F. but preferably the melt is heated at a steadily increasing temperature between 2500-3100‹ F. during a run of about one hour. In the preferred embodiment, H 2 gas containing less than 50 p.p.m. water, is initially passed at a rate of 0À01-0À06 cu. ft./ sec. for about 10 minutes and the rate is then reduced to 0À001-0À003 cu. ft./sec. and a water content increased to 300 p.p.m. In the final growth stage the hydrogen rate is further decreased to 0.0001 cu. ft./sec. and the water content increased to 3000 p.p.m., although up to 40,000 p.p.m. is permissible. The product is formed on the cover and yield may be enhanced by using oxides of Al, Si, Fe, Ti, Zr, Cr or Co in the manufacture of the ceramic material. The density of mat varies with the distance between the said cover and the aluminium charge and with the metallic aluminium content of the cover. Secondary fibres may be formed amongst the enmeshed fibres and the mat may be embedded in plastics, ceramic or metal materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7003/68A GB1203342A (en) | 1968-02-13 | 1968-02-13 | A mat article of single crystal alpha-alumina fibers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7003/68A GB1203342A (en) | 1968-02-13 | 1968-02-13 | A mat article of single crystal alpha-alumina fibers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1203342A true GB1203342A (en) | 1970-08-26 |
Family
ID=9824777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7003/68A Expired GB1203342A (en) | 1968-02-13 | 1968-02-13 | A mat article of single crystal alpha-alumina fibers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1203342A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2599749A1 (en) | 2011-11-30 | 2013-06-05 | Neoker, S.L | Method for the purification of alpha-alumina fibers |
-
1968
- 1968-02-13 GB GB7003/68A patent/GB1203342A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2599749A1 (en) | 2011-11-30 | 2013-06-05 | Neoker, S.L | Method for the purification of alpha-alumina fibers |
| WO2013079620A1 (en) | 2011-11-30 | 2013-06-06 | Neoker, S.L. | Method for the purification of alpha-alumina fibers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |