CN102442668A - Method for preparing aluminum carbide from aluminum oxide - Google Patents
Method for preparing aluminum carbide from aluminum oxide Download PDFInfo
- Publication number
- CN102442668A CN102442668A CN2011102949027A CN201110294902A CN102442668A CN 102442668 A CN102442668 A CN 102442668A CN 2011102949027 A CN2011102949027 A CN 2011102949027A CN 201110294902 A CN201110294902 A CN 201110294902A CN 102442668 A CN102442668 A CN 102442668A
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- CN
- China
- Prior art keywords
- aluminum oxide
- aluminum
- carbide
- aluminum carbide
- graphite
- 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.)
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Links
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 22
- CAVCGVPGBKGDTG-UHFFFAOYSA-N alumanylidynemethyl(alumanylidynemethylalumanylidenemethylidene)alumane Chemical compound [Al]#C[Al]=C=[Al]C#[Al] CAVCGVPGBKGDTG-UHFFFAOYSA-N 0.000 title abstract 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 14
- 239000010439 graphite Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims description 5
- 238000010792 warming Methods 0.000 claims description 5
- TWHBEKGYWPPYQL-UHFFFAOYSA-N aluminium carbide Chemical compound [C-4].[C-4].[C-4].[Al+3].[Al+3].[Al+3].[Al+3] TWHBEKGYWPPYQL-UHFFFAOYSA-N 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 3
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- ZBZHVBPVQIHFJN-UHFFFAOYSA-N trimethylalumane Chemical compound C[Al](C)C.C[Al](C)C ZBZHVBPVQIHFJN-UHFFFAOYSA-N 0.000 description 23
- 229910017083 AlN Inorganic materials 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 2
- 229910018173 Al—Al Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910004349 Ti-Al Inorganic materials 0.000 description 1
- 229910004692 Ti—Al Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000007809 chemical reaction catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
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- Carbon And Carbon Compounds (AREA)
Abstract
The invention relates to a method for preparing aluminum carbide from aluminum oxide, which comprises the steps of: mixing industrial pure aluminum oxide as a raw material with graphite as a reducing agent; then putting the mixture at a pressure of 1-200 Pa; heating the mixture to 1450-1600 DEG C for 60-120 min; then keeping the heat for 30-120 min; and cooling the mixture to obtain the aluminum carbide, wherein purity of the aluminum carbide is more than 90% and up to 96.38%. The method disclosed by the invention is finished in a vacuum environment; the obtained aluminum carbide is pure and free from impurities; and gas generated from reaction is controlled easily. As the aluminum oxide and the graphite carbon are adopted as reactive materials, the reactive materials are obtained easily and low in cost. The method for preparing aluminum carbide from aluminum oxide disclosed by the invention is short in aluminum carbide preparation technological process, clean, free from pollution, as well as simple and convenient in operation.
Description
Technical field
The present invention relates to the method that the carbothermic reduction aluminum oxide prepares aluminium carbide, be specifically related to a kind ofly prepare the method for aluminium carbide, belong to the pyrometallurgy technical field by aluminum oxide.
Background technology
Aluminium carbide is a kind of crystal of fallow, hard, transparent rhombohedron, 2100 ℃ of fusing points.Aluminium carbide is a kind of important compound in the metallic aluminium industrial technology field; Be used for reducing metal oxide in metallurgical industry;, be used to make aluminium nitride AlN at ceramic industry and make high temperature, cutting and advanced ceramic materials such as mould and mechanical part as chemical reaction catalyst at chemical industry.In addition, aluminium carbide can strengthen synthetic materials and alloy (Al-Al as additive
4C
3, Al-SiC-Al
4C
3, Al-Al
3Ti-Al
4C
3Deng) intensity.
At present, aluminium carbide also is not applied to the maturation process of industrial practice generally through fine aluminium and carbon prepared in reaction.
Summary of the invention
Be to solve the process method of industrial preparation aluminium carbide, the present invention provides a kind of and prepares the method for aluminium carbide by aluminum oxide, is that raw material, graphite are reductive agent through adopting the technical pure aluminum oxide, makes aluminium carbide, realizes through following technical proposal.
A kind ofly prepare the method for aluminium carbide by aluminum oxide, through following each step:
A. the mass ratio by aluminum oxide and graphite is that 3～5 ︰ 1 get aluminum oxide and graphite, and it is mixed, and under the pressure of 3～10Mpa, processes block;
B. steps A gained lumpy material is placed under the vacuum, keeping pressure is 1～200Pa, is warming up to 1450～1600 ℃ through 60～120min, is incubated 30～120min again, promptly obtains aluminium carbide after cooling.
The aluminum oxide of said steps A is the technical pure aluminum oxide powder.
The block size that said steps A is processed is
20mm * 10mm.
Gained aluminium carbide purity reaches as high as 96.38% more than 90%.
The present invention has advantage:
(1) accomplish under the vacuum environment, the pure inclusion-free of gained aluminium carbide, it is easy to control that reaction generates gas;
(2) adopt aluminum oxide and graphite carbon as reaction mass, reaction mass is prone to obtain, and cost is low;
(3) short, the cleanliness without any pollution of preparation aluminium carbide technical process, and easy and simple to handle.
Description of drawings
Fig. 1 is X-ray diffraction (XRD) collection of illustrative plates of the embodiment of the invention 1 gained aluminium carbide;
Fig. 2 is the photo of the sem (SEM) of the embodiment of the invention 1 gained aluminium carbide.
Embodiment
To combine embodiment further to illustrate content of the present invention below, but these instances do not limit protection scope of the present invention.
Embodiment 1
A. the mass ratio by technical pure aluminum oxide powder and graphite is that 3 ︰ 1 get aluminum oxide and graphite is total to 80g; And it is mixed, under the pressure of 3Mpa, process
20mm * 10mm block;
B. steps A gained lumpy material is placed under the vacuum, keeping pressure is 50Pa, is warming up to 1550 ℃ through 120min, is incubated 60min again, promptly obtains aluminium carbide 41.8g after cooling, analyzes aluminium carbide purity through SEM, EDS and reaches more than 90%.
Embodiment 2
A. the mass ratio by technical pure aluminum oxide powder and graphite is that 5 ︰ 1 get aluminum oxide and graphite is total to 60g; And it is mixed, under the pressure of 8Mpa, process
20mm * 10mm block;
B. steps A gained lumpy material is placed under the vacuum, keeping pressure is 200Pa, is warming up to 1600 ℃ through 60min, is incubated 120min again, promptly obtains aluminium carbide 34.6g after cooling, and aluminium carbide purity reaches more than 94.57%.
Embodiment 3
A. the mass ratio by technical pure aluminum oxide powder and graphite is that 4 ︰ 1 get aluminum oxide and graphite is total to 80g; And it is mixed, under the pressure of 10Mpa, process
20mm * 10mm block;
B. steps A gained lumpy material is placed under the vacuum, keeping pressure is 1Pa, is warming up to 1450 ℃ through 80min, is incubated 30min again, promptly obtains aluminium carbide 42.6g after cooling, and aluminium carbide purity reaches more than 92.43%.
Claims (3)
1. one kind prepares the method for aluminium carbide by aluminum oxide, it is characterized in that through following each step:
A. the mass ratio by aluminum oxide and graphite is that 3～5 ︰ 1 get aluminum oxide and graphite, and it is mixed, and under the pressure of 3～10Mpa, processes block;
B. steps A gained lumpy material being placed pressure is under 1～200Pa, is warming up to 1450～1600 ℃ through 60～120min, is incubated 30～120min again, promptly obtains aluminium carbide after cooling.
2. method according to claim 1 is characterized in that: the aluminum oxide of said steps A is the technical pure aluminum oxide powder.
3. method according to claim 1 and 2 is characterized in that: the block size of said steps A is
20mm * 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102949027A CN102442668A (en) | 2011-10-08 | 2011-10-08 | Method for preparing aluminum carbide from aluminum oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102949027A CN102442668A (en) | 2011-10-08 | 2011-10-08 | Method for preparing aluminum carbide from aluminum oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102442668A true CN102442668A (en) | 2012-05-09 |
Family
ID=46005668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102949027A Pending CN102442668A (en) | 2011-10-08 | 2011-10-08 | Method for preparing aluminum carbide from aluminum oxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102442668A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106882773A (en) * | 2017-03-06 | 2017-06-23 | 昆明理工大学 | A kind of method for preparing aluminium nitride |
| CN109055753A (en) * | 2018-07-27 | 2018-12-21 | 昆明理工大学 | A kind of method that alumina carbon thermal reduction prepares metallic aluminium |
-
2011
- 2011-10-08 CN CN2011102949027A patent/CN102442668A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 王鹏程: "氧化铝真空碳热还原实验研究", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106882773A (en) * | 2017-03-06 | 2017-06-23 | 昆明理工大学 | A kind of method for preparing aluminium nitride |
| CN106882773B (en) * | 2017-03-06 | 2019-04-12 | 昆明理工大学 | A method of preparing aluminium nitride |
| CN109055753A (en) * | 2018-07-27 | 2018-12-21 | 昆明理工大学 | A kind of method that alumina carbon thermal reduction prepares metallic aluminium |
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Application publication date: 20120509 |