EP0000661A1 - Préparation de carbure de silicium et carbure de silicium ainsi préparé - Google Patents
Préparation de carbure de silicium et carbure de silicium ainsi préparé Download PDFInfo
- Publication number
- EP0000661A1 EP0000661A1 EP78300197A EP78300197A EP0000661A1 EP 0000661 A1 EP0000661 A1 EP 0000661A1 EP 78300197 A EP78300197 A EP 78300197A EP 78300197 A EP78300197 A EP 78300197A EP 0000661 A1 EP0000661 A1 EP 0000661A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- silicon carbide
- carbonaceous material
- making
- making silicon
- atmospheres
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/956—Silicon carbide
- C01B32/963—Preparation from compounds containing silicon
- C01B32/97—Preparation from SiO or SiO2
Definitions
- This invention is about making silicon carbide.
- silicon carbide is made by heating a powdered mixture of high-grade silica sand and high-grade carbon such as anthracite or petroleum coke. Temperatures of 2000 - 2500 C have to be sustained for a day or more, and the yield is far short of 100%. We tentatively believe that gaseous silicon species, on contacting a carbon particle, form silicon carbide which thus soon envelopes the particle. Further conversion of that particle must then depend on solid-state diffusion through its silicon-carbide envelope, hence the slow reaction and high temperatures required.
- high-grade silica sand and high-grade carbon such as anthracite or petroleum coke.
- the invention is making silicon carbide by heating a mixture of silica with a carbonaceous material at from 1350°C to 1550 0 C under a partial pressure of carbon monoxide, measured in atmospheres, not exceeding ten raised to the power (8.6 - 15600/T) where T is the temperature in degrees Kelvin, the carbonaceous material being such that a specimen thereof loses (by oxidation) at least 40mg/cm 2 /sec of carbon in excess carbon dioxide at 1 atmosphere pressure at 1450 C.
- the silicon carbide so made is in the form of fine particles of ⁇ -phase, which has a cubic crystal structure.
- a preferred temperature range having regard to such factors as today's technical capabilities, relative costs and interest rates, is from 1400°C to 1500°C, and a most preferred range is from 1420°C to 1480°C, with an optimum at around 1450°C, where complete reaction may typically take some 40 minutes (compared with 10 minutes at. 1500°C, and a few hours for an incomplete reaction at 1350 C).
- the maximum partial pressure of carbon monoxide which can be used according to the invention is as follows:
- the carbonaceous material may for example be coal (including for example lignite), rice husks (which have a negative cost at present, inasmuch as contractors are paid to dump them), and coconut charcoal.
- the carbonaceous material must not be any of the following (for example): petroleum coke without additions, high-grade anthracite, and spectroscopically pure graphite without additions; the reactivity of these is too low.
- Electrode graphite is a borderline material, which it is on the whole preferred to eschew.
- the carbonaceous material must have a reactivity of at least 40mg/cm /sec on the basis explained above, and the reactivities of coconut charcoal and spectroscopically pure graphite are 70 and 3mg/cm 2 /sec respectively on the same basis.
- the silicon carbide made according to the invention may be exploited, for instance, as a raw material in the refractories and abrasives industries.
- the crucible charge then contained cubic ⁇ -silicon carbide of.good purity in fine powder form, and contained no silica (cristobalite) according to X-ray diffraction investigations; in other words, all the silicon had been converted.
- the furnace was evacuated and then heated to 1450°C and its bed was fluidised with excess pure carbon dioxide at 1 atmosphere.
- the Buffalo Nuts began to oxidise according to the reaction C + CO 2 ⁇ 2CO, and after a set time the heating and gas were stopped.
- the weight loss of the Buffalo Nuts was found to be 80mg/cm 2 /sec.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3158377 | 1977-07-27 | ||
GB3158377 | 1977-07-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0000661A1 true EP0000661A1 (fr) | 1979-02-07 |
Family
ID=10325295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP78300197A Withdrawn EP0000661A1 (fr) | 1977-07-27 | 1978-07-25 | Préparation de carbure de silicium et carbure de silicium ainsi préparé |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0000661A1 (fr) |
JP (1) | JPS5425300A (fr) |
IT (1) | IT1107474B (fr) |
NO (1) | NO782569L (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4283375A (en) * | 1980-01-28 | 1981-08-11 | Great Lakes Carbon Corporation | Production of SiC whiskers |
US5190737A (en) * | 1989-01-11 | 1993-03-02 | The Dow Chemical Company | High yield manufacturing process for silicon carbide |
EP0543751A1 (fr) * | 1991-11-21 | 1993-05-26 | PECHINEY RECHERCHE (Groupement d'Intérêt Economique régi par l'Ordonnance du 23 Septembre 1967) Immeuble Balzac | Procédé de fabrication de carbures métalliques à grande surface spécifique sous balayage de gaz inerte à pression atmosphérique |
US5340417A (en) * | 1989-01-11 | 1994-08-23 | The Dow Chemical Company | Process for preparing silicon carbide by carbothermal reduction |
WO2023060294A1 (fr) | 2021-10-15 | 2023-04-20 | Ebner Industrieofenbau Gmbh | Système de four industriel |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0682286B2 (ja) * | 1985-10-28 | 1994-10-19 | 株式会社神戸製鋼所 | ロボツト制御装置 |
DE4030954C2 (de) * | 1990-09-29 | 1994-08-04 | Danfoss As | Verfahren zur Steuerung der Bewegung eines hydraulisch bewegbaren Arbeitsgeräts und Bahnsteuereinrichtung zur Durchführung des Verfahrens |
CN102596802A (zh) * | 2009-08-26 | 2012-07-18 | Lg伊诺特有限公司 | 用于制备碳化硅粉体的系统和方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU138238A1 (ru) * | 1960-01-29 | 1960-11-30 | Е.А. Вуколов | Способ получени карбида кремни |
AT260170B (de) * | 1964-10-14 | 1968-02-12 | Du Pont | Verfahren zur Herstellung von Siliziumkarbid |
GB1105882A (en) * | 1965-03-10 | 1968-03-13 | Corning Glass Works | Manufacture of silicon carbide fibres |
DE1567593A1 (de) * | 1965-04-27 | 1969-10-09 | Ionics | Herstellung von Siliciumcarbid geringer Korngroesse |
DE2052507A1 (de) * | 1970-10-26 | 1972-05-10 | Sued Chemie Ag | Verfahren zur Herstellung von Aktivkohle |
US3754076A (en) * | 1970-10-30 | 1973-08-21 | Univ Utah | Production of silicon carbide from rice hulls |
-
1978
- 1978-07-24 JP JP9030778A patent/JPS5425300A/ja active Pending
- 1978-07-24 IT IT50447/78A patent/IT1107474B/it active
- 1978-07-25 EP EP78300197A patent/EP0000661A1/fr not_active Withdrawn
- 1978-07-26 NO NO782569A patent/NO782569L/no unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU138238A1 (ru) * | 1960-01-29 | 1960-11-30 | Е.А. Вуколов | Способ получени карбида кремни |
AT260170B (de) * | 1964-10-14 | 1968-02-12 | Du Pont | Verfahren zur Herstellung von Siliziumkarbid |
GB1105882A (en) * | 1965-03-10 | 1968-03-13 | Corning Glass Works | Manufacture of silicon carbide fibres |
DE1567593A1 (de) * | 1965-04-27 | 1969-10-09 | Ionics | Herstellung von Siliciumcarbid geringer Korngroesse |
DE2052507A1 (de) * | 1970-10-26 | 1972-05-10 | Sued Chemie Ag | Verfahren zur Herstellung von Aktivkohle |
US3754076A (en) * | 1970-10-30 | 1973-08-21 | Univ Utah | Production of silicon carbide from rice hulls |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4283375A (en) * | 1980-01-28 | 1981-08-11 | Great Lakes Carbon Corporation | Production of SiC whiskers |
US5190737A (en) * | 1989-01-11 | 1993-03-02 | The Dow Chemical Company | High yield manufacturing process for silicon carbide |
US5340417A (en) * | 1989-01-11 | 1994-08-23 | The Dow Chemical Company | Process for preparing silicon carbide by carbothermal reduction |
EP0543751A1 (fr) * | 1991-11-21 | 1993-05-26 | PECHINEY RECHERCHE (Groupement d'Intérêt Economique régi par l'Ordonnance du 23 Septembre 1967) Immeuble Balzac | Procédé de fabrication de carbures métalliques à grande surface spécifique sous balayage de gaz inerte à pression atmosphérique |
AU651256B2 (en) * | 1991-11-21 | 1994-07-14 | Centre National De La Recherche Scientifique | Process for the production of metal carbides having a large specific surface under atmospheric pressure inert gas scavenging |
WO2023060294A1 (fr) | 2021-10-15 | 2023-04-20 | Ebner Industrieofenbau Gmbh | Système de four industriel |
Also Published As
Publication number | Publication date |
---|---|
IT7850447A0 (it) | 1978-07-24 |
JPS5425300A (en) | 1979-02-26 |
NO782569L (no) | 1979-01-30 |
IT1107474B (it) | 1985-11-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): BE CH DE FR GB NL SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn | ||
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: POMFRET, ROGER JOHN Inventor name: GRIEVESON, PAUL Inventor name: TAYLOR, JOHN |