GB1238551A - - Google Patents
Info
- Publication number
- GB1238551A GB1238551A GB1238551DA GB1238551A GB 1238551 A GB1238551 A GB 1238551A GB 1238551D A GB1238551D A GB 1238551DA GB 1238551 A GB1238551 A GB 1238551A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mixture
- sheet
- coiling
- plasticizer
- sintering
- 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
- C04B35/591—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 reaction sintering
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Ceramic Products (AREA)
Abstract
1,238,551. Silicon nitride. LEYLAND GAS TURBINES Ltd. 16 March, 1970 [19 March, 1969], No. 14404/69. Heading C1A. [Also in Divisions C7 and F4] Si 3 N 4 in sheet or shaped form is made by calendering a mixture of powdered Si, a binder, e.g. polymer of vinyl butyral and a plasticizer, e.g. di-butyl phthalate, preheating below nitriding temperature, e.g. 300-400‹ C. and then sintering in nitrogen, e.g. at 1350-1450‹ C. to form Si 3 N 4 . As shown, a powder mixture of 83.9%. Si, 9.2% binder, 7% plasticizer is extruded at 3, calendered at 4, optionally corrugated at 8, prior to preheating and sintering. The matrix of a rotary heat exchanger is made by superimposing a flat sheet of the mixture on a corrugated sheet, and coiling into a spiral at 10. The sheets may be held together by a Si adhesive prior to coiling.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1440469 | 1969-03-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1238551A true GB1238551A (en) | 1971-07-07 |
Family
ID=10040605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1238551D Expired GB1238551A (en) | 1969-03-19 | 1969-03-19 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1238551A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2559761A1 (en) * | 1984-02-16 | 1985-08-23 | Kurosaki Refractories Co | PROCESS FOR PRODUCING A SINTERED BODY OF COMPLEX FORM SILICON NITRIDE |
| GB2156853A (en) * | 1984-02-16 | 1985-10-16 | Kurosaki Refractories Co | Method of bonding ceramics |
| GB2157668A (en) * | 1984-03-03 | 1985-10-30 | Kurosaki Refractories Co | Producing silicon nitride sintered products |
| CN112573936A (en) * | 2020-12-14 | 2021-03-30 | 哈尔滨工业大学 | Preparation method of silicon nitride ceramic substrate |
-
1969
- 1969-03-19 GB GB1238551D patent/GB1238551A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2559761A1 (en) * | 1984-02-16 | 1985-08-23 | Kurosaki Refractories Co | PROCESS FOR PRODUCING A SINTERED BODY OF COMPLEX FORM SILICON NITRIDE |
| GB2156382A (en) * | 1984-02-16 | 1985-10-09 | Kurosaki Refractories Co | Producing a silicon nitride sintered body of complex shape |
| GB2156853A (en) * | 1984-02-16 | 1985-10-16 | Kurosaki Refractories Co | Method of bonding ceramics |
| GB2157668A (en) * | 1984-03-03 | 1985-10-30 | Kurosaki Refractories Co | Producing silicon nitride sintered products |
| CN112573936A (en) * | 2020-12-14 | 2021-03-30 | 哈尔滨工业大学 | Preparation method of silicon nitride ceramic substrate |
| CN112573936B (en) * | 2020-12-14 | 2022-12-09 | 哈尔滨工业大学 | Preparation method of silicon nitride ceramic substrate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |