GB1364451A - Hot pressing silicon nitride - Google Patents
Hot pressing silicon nitrideInfo
- Publication number
- GB1364451A GB1364451A GB5264270A GB5264270A GB1364451A GB 1364451 A GB1364451 A GB 1364451A GB 5264270 A GB5264270 A GB 5264270A GB 5264270 A GB5264270 A GB 5264270A GB 1364451 A GB1364451 A GB 1364451A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hot pressing
- coated
- silicon nitride
- graphite
- mgo
- 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
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
- C04B35/593—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by pressure sintering
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
1364451 Hot pressing silicon nitride DEFENCE SECRETARY OF STATE FOR 26 Oct 1971[5 Nov 1970] 52642/70 Heading C7D A number of Si 3 N 4 articles are formed by simultaneously hot pressing a number of charges 24 of Si 3 N 4 powder and a flux in a die 10 with each charge separated by a spacer 22 coated with a release agent. The charges preferably consist of a -300 mesh mixture of Si 3 N 4 and MgO in a weight ratio of 20:1 and the graphite spacers 22 are coated with an aqueous suspension of MgO. The inside walls of the graphite die 10 may be coated with BN. A mould space divider 48 comprising circular sheet metal band 50 with radially extending arms 52 may be used for charging the powder on the graphite spacers 22 and removed after charging. The hot pressing temperature is controlled to maintain the charge below 1900-2050‹C which is the Si 3 N 4 dissociation temperature.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5264270A GB1364451A (en) | 1970-11-05 | 1970-11-05 | Hot pressing silicon nitride |
IT305471A IT943642B (en) | 1970-11-05 | 1971-10-29 | METHOD AND APPARATUS FOR PRODUCING SILICON NITRIDE ARTICLES |
DE19712154479 DE2154479A1 (en) | 1970-11-05 | 1971-11-02 | Method and device for the simultaneous production of several compacted silicon nitride molded bodies by means of hot pressing |
FR7139741A FR2113613A5 (en) | 1970-11-05 | 1971-11-05 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5264270A GB1364451A (en) | 1970-11-05 | 1970-11-05 | Hot pressing silicon nitride |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1364451A true GB1364451A (en) | 1974-08-21 |
Family
ID=10464716
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5264270A Expired GB1364451A (en) | 1970-11-05 | 1970-11-05 | Hot pressing silicon nitride |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2154479A1 (en) |
FR (1) | FR2113613A5 (en) |
GB (1) | GB1364451A (en) |
IT (1) | IT943642B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0120846A1 (en) * | 1982-09-30 | 1984-10-10 | Ford Motor Co | Method of fabricating hot pressed ceramic bodies. |
EP0121515A1 (en) * | 1982-09-30 | 1984-10-17 | Ford Motor Company Limited | Method of hot pressing reactive materials |
EP0121516A1 (en) * | 1982-09-30 | 1984-10-17 | Ford Motor Co | Method of forming dense ceramic bodies. |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU563498B2 (en) * | 1983-07-19 | 1987-07-09 | Ford Motor Co. | Making hot pressed silicon nitride by use of low density reaction bonded body |
-
1970
- 1970-11-05 GB GB5264270A patent/GB1364451A/en not_active Expired
-
1971
- 1971-10-29 IT IT305471A patent/IT943642B/en active
- 1971-11-02 DE DE19712154479 patent/DE2154479A1/en active Pending
- 1971-11-05 FR FR7139741A patent/FR2113613A5/fr not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0120846A1 (en) * | 1982-09-30 | 1984-10-10 | Ford Motor Co | Method of fabricating hot pressed ceramic bodies. |
EP0121515A1 (en) * | 1982-09-30 | 1984-10-17 | Ford Motor Company Limited | Method of hot pressing reactive materials |
EP0121516A1 (en) * | 1982-09-30 | 1984-10-17 | Ford Motor Co | Method of forming dense ceramic bodies. |
EP0121515A4 (en) * | 1982-09-30 | 1985-03-06 | Ford Motor Co | Method of hot pressing reactive materials. |
EP0120846A4 (en) * | 1982-09-30 | 1985-03-08 | Ford Motor Co | Method of fabricating hot pressed ceramic bodies. |
EP0121516A4 (en) * | 1982-09-30 | 1985-03-08 | Ford Motor Co | Method of forming dense ceramic bodies. |
Also Published As
Publication number | Publication date |
---|---|
DE2154479A1 (en) | 1972-05-25 |
FR2113613A5 (en) | 1972-06-23 |
IT943642B (en) | 1973-04-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
PCNP | Patent ceased through non-payment of renewal fee |