CN101289206A - Method for preparing thermal spraying alumina powder - Google Patents
Method for preparing thermal spraying alumina powder Download PDFInfo
- Publication number
- CN101289206A CN101289206A CNA2008101147807A CN200810114780A CN101289206A CN 101289206 A CN101289206 A CN 101289206A CN A2008101147807 A CNA2008101147807 A CN A2008101147807A CN 200810114780 A CN200810114780 A CN 200810114780A CN 101289206 A CN101289206 A CN 101289206A
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- CN
- China
- Prior art keywords
- aluminum oxide
- thermal spraying
- alumina powder
- alumina
- preparation
- 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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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000000843 powder Substances 0.000 title claims abstract description 30
- 238000007751 thermal spraying Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title abstract description 9
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 13
- 239000013078 crystal Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 230000007935 neutral effect Effects 0.000 claims abstract description 7
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 32
- 238000002360 preparation method Methods 0.000 claims description 19
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 12
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 10
- 239000004327 boric acid Substances 0.000 claims description 10
- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical group FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 claims description 6
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminum fluoride Inorganic materials F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- LDDQLRUQCUTJBB-UHFFFAOYSA-N ammonium fluoride Chemical compound [NH4+].[F-] LDDQLRUQCUTJBB-UHFFFAOYSA-N 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000005554 pickling Methods 0.000 claims description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 abstract description 2
- 239000007790 solid phase Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000001354 calcination Methods 0.000 abstract 3
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000000411 inducer Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 9
- 238000005507 spraying Methods 0.000 description 9
- 238000005303 weighing Methods 0.000 description 8
- 238000000576 coating method Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000001579 optical reflectometry Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention provides a method for preparing alumina powder for thermal spraying and relates to an industrial method for preparing alumina powder for thermal spraying by solid phase calcination used at low temperature. The method is characterized in that industrial aluminum hydroxide or industrial alumina is used as raw material in the preparing process, the raw material is put into a muffle furnace at the temperature of 1200 DEG C to 1600 DEG C for calcination for 2 hours to 6 hours under synergistic action of a crystal growth agent and a crystal inducer, the obtained alumina after the calcination is ground, washed by acid, washed by water to be neutral, is dried and sieved to obtain round flake-shaped alumina with complete crystal, high purity (the content of the alumina reaches 99.5 percent), good fluidity and even grain size.
Description
Technical field
A kind of preparation method of thermal spraying alumina powder relates to the commercial run that a kind of low temperature solid phase is burnt till preparation used for hot spraying aluminum oxide.
Background technology
In recent years, along with the continuous development of hot-spraying techniques, aluminum oxide becomes stupalith the most frequently used in the hot-spraying techniques gradually.Aluminum oxide, because of its fusing point height, hardness is big, and chemical property is stable, so that its coating is widely used in is wear-resisting, anti-corrosion, high temperature resistant, association areas such as insulation.
The performance of thermospray aluminum oxide coating layer, not only relevant, and the state parameter of spraying particle own with spraying coating process, also can finally influence the effect of spray-on coating.According to the needs of spraying coating process, the alumina powder jointed necessary certain purity that keeps will have good flowability simultaneously.At present, required alumina powder jointed of thermospray generally will carry out granulation and handle.Alumina powder jointed through after the granulation, though can the alumina powder jointed pattern of appropriate change, obtain sphere or inferior spheric aluminum oxide, improves alumina powder jointed flowability, the while also can be introduced impurity in the process of granulation, finally influenced the result of use of coating.The high pure spherical aluminum oxide of being produced by Zhengzhou research institute of Chinese Aluminium Co., Ltd can satisfy the performance that sprays, and still, cost is too high.
As a kind of ceramic coating,, also need to add the toughness that a certain amount of tabular alumina improves pottery in order to change the performance of pottery.At present, the tabular alumina of gained substantially all is a hexagonal plate, and flowability neither be very good, directly use heat spraying.
Summary of the invention
Purpose of the present invention provides a kind of aluminum oxide purity height just at the deficiencies in the prior art and shortcoming, even particle size distribution, and good fluidity, perfect crystalline, there are not the circle of corner angle or the preparation method of inferior spherical sheet thermal spraying alumina powder.
The objective of the invention is to be achieved through the following technical solutions.
A kind of preparation method of thermal spraying alumina powder is characterized in that the step of its preparation process comprises:
(1) is raw material with aluminium hydroxide or aluminum oxide, adds crystal promotor aluminium or the halogenide of ammonium and the compound of crystal inductor boracic, mix;
(2),, obtain the round sheet aluminum oxide at 1200-1600 ℃ of roasting 2-6 hour with mixed raw materials;
(3) the round sheet aluminum oxide that obtains is pulverized pickling, remove the impurity of aluminum oxide after, wash powder and be neutral;
(4) will wash and be neutral powder drying, screening, obtain the uniform round sheet aluminum oxide of particle diameter.
The preparation method of a kind of thermal spraying alumina powder of the present invention is characterized in that the halogenide of described adding crystal promotor aluminium or ammonium is aluminum fluoride or Neutral ammonium fluoride, and add-on is the 1%-5% of aluminum oxide or aluminium hydroxide quality.
The preparation method of a kind of thermal spraying alumina powder of the present invention, the compound that it is characterized in that described crystal inductor boracic is a boric acid, add-on is the 1%-5% of aluminum oxide or aluminium hydroxide quality.
The preparation method of a kind of thermal spraying alumina powder of the present invention, it is characterized in that adopting when described round sheet aluminum oxide is pulverized pickling is the vitriol oil.With respect to other acid, the heat energy that the vitriol oil self is emitted is effectively removed impurity, economizes on resources.
Adopt the round sheet aluminum oxide of method preparation of the present invention, owing to there are not corner angle, good fluidity especially is suitable as the thermospray ceramics powder, and as polishing powder.Adopt this prepared round sheet aluminum oxide, have following advantage: 1) preparation technology is simple, cost is low, the cycle is short, is easy to engineering and amplifies; 2) this tabular alumina even particle size distribution, good fluidity, perfect crystalline, there is not the circular or inferior spheric tabular alumina of corner angle; 3) maturing temperature is low, helps energy efficient, and does not produce the three wastes, and is environmentally friendly; 4) the tabular alumina powder of preparing does not have corner angle, can well transmit heat, also can be useful on polishing powder, have the high light reflectivity performance.
Description of drawings
Fig. 1 is for adopting the used for hot spraying aluminum oxide stereoscan photograph of method preparation of the present invention.
Embodiment
A kind of preparation method of thermal spraying alumina powder, the step of its preparation process comprises:
(1) is raw material with aluminium hydroxide or aluminum oxide, adds crystal promotor aluminium or the halogenide of ammonium and the compound of crystal inductor boracic, mix;
(2),, obtain spherical tabular alumina at 1200-1600 ℃ of roasting 2-6 hour with mixed raw materials;
(3) the round sheet aluminum oxide that obtains is pulverized pickling, remove the impurity of aluminum oxide after, wash powder and be neutral;
(4) will wash and be neutral powder drying, screening, obtain the uniform round sheet aluminum oxide of particle diameter.
Embodiment 1
Take by weighing industrial aluminium hydroxide 10.25 grams, Neutral ammonium fluoride 0.0523 gram, boric acid 0.1580 gram, mixing in the three-dimensional motion mixer.Raw material with mixing is contained in the crucible then, and crucible is placed in the retort furnace, is heated to 1450 ℃, and 1450 ℃ of insulations 3 hours, behind the naturally cooling, the aluminum oxide that burns till is poured out fragmentation, pickling.Clean to neutrality with deionized water again, in the oven dry of loft drier class, screening can obtain used for hot spraying round sheet aluminum oxide.
Embodiment 2
Take by weighing industrial aluminium hydroxide 10.25 grams, Neutral ammonium fluoride 0.1523 gram, boric acid 0.0580 gram, mixing in the three-dimensional motion mixer.All the other are with embodiment 1.
Embodiment 3
Take by weighing industrial aluminium hydroxide 10.25 grams, Neutral ammonium fluoride 0.1423 gram, boric acid 0.1580 gram, mixing in the three-dimensional motion mixer.All the other are with embodiment 1.
Embodiment 4
Take by weighing industrial aluminium hydroxide 10.25 grams, aluminum fluoride 0.1423 gram, boric acid 0.1580 gram, mixing in the three-dimensional motion mixer.All the other are with embodiment 1.
Embodiment 5
Take by weighing industrial aluminium hydroxide 10.25 grams, aluminum fluoride 0.3423 gram, boric acid 0.1580 gram, mixing in the three-dimensional motion mixer.All the other are with embodiment 1.
Embodiment 6
Take by weighing commercial alumina 10.25 grams, aluminum fluoride 0.1423 gram, boric acid 0.0580 gram, mixing in the three-dimensional motion mixer.All the other are with embodiment 1.
Embodiment 7
Take by weighing commercial alumina 10.25 grams, aluminum fluoride 0.1423 gram, boric acid 0.1580 gram, mixing in the three-dimensional motion mixer.All the other are with embodiment 1.
Embodiment 8
Take by weighing commercial alumina 10.25 grams, Neutral ammonium fluoride 0.1423 gram, boric acid 0.1580 gram, mixing in the three-dimensional motion mixer.All the other are with embodiment 1.
Claims (4)
1. the preparation method of a thermal spraying alumina powder is characterized in that the step of its preparation process comprises:
(1) is raw material with aluminium hydroxide or aluminum oxide, adds crystal promotor aluminium or the halogenide of ammonium and the compound of crystal inductor boracic, mix;
(2),, obtain the round sheet aluminum oxide at 1200-1600 ℃ of roasting 2-6 hour with mixed raw materials;
(3) the round sheet aluminum oxide that obtains is pulverized pickling, remove the impurity of aluminum oxide after, wash powder and be neutral;
(4) will wash and be neutral powder drying, screening, obtain the uniform round sheet aluminum oxide of particle diameter.
2. the preparation method of a kind of thermal spraying alumina powder according to claim 1 is characterized in that the halogenide of described adding crystal promotor aluminium or ammonium is aluminum fluoride or Neutral ammonium fluoride, and add-on is the 1%-5% of aluminum oxide or aluminium hydroxide quality.
3. the preparation method of a kind of thermal spraying alumina powder according to claim 1, the compound that it is characterized in that described crystal inductor boracic is a boric acid, add-on is the 1%-5% of aluminum oxide or aluminium hydroxide quality.
4. the preparation method of a kind of thermal spraying alumina powder according to claim 1, it is characterized in that adopting when described round sheet aluminum oxide is pulverized pickling is the vitriol oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101147807A CN101289206A (en) | 2008-06-12 | 2008-06-12 | Method for preparing thermal spraying alumina powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101147807A CN101289206A (en) | 2008-06-12 | 2008-06-12 | Method for preparing thermal spraying alumina powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101289206A true CN101289206A (en) | 2008-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101147807A Pending CN101289206A (en) | 2008-06-12 | 2008-06-12 | Method for preparing thermal spraying alumina powder |
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|---|---|
| CN (1) | CN101289206A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009993A (en) * | 2010-12-15 | 2011-04-13 | 中国铝业股份有限公司 | Method for preparing submicron aluminium oxide by two-stage roasting method |
| CN103101949A (en) * | 2011-11-11 | 2013-05-15 | 雅宝研磨材(苏州)有限公司 | Preparation method of alpha-AL2O3 polishing powder |
| CN103936044A (en) * | 2014-02-26 | 2014-07-23 | 贵州万方铝化科技开发有限公司 | Method for efficiently recycling fluoride in aluminum-containing compound preparation process |
| CN104945959A (en) * | 2015-06-16 | 2015-09-30 | 泰安盛源粉体有限公司 | Preparation method of high-purity electric filler aluminium oxide for insulation |
| CN105668599A (en) * | 2016-01-14 | 2016-06-15 | 洛阳三睿宝纳米科技有限公司 | Nano-alumina polishing material and preparation method thereof |
| CN106006691A (en) * | 2016-01-14 | 2016-10-12 | 洛阳三睿宝纳米科技有限公司 | Nanoscale corundum material for metal hot spraying |
| CN107285348A (en) * | 2017-07-14 | 2017-10-24 | 杭州智华杰科技有限公司 | A kind of method that water quenching prepares Ultrafine Aluminium Oxide Particle |
-
2008
- 2008-06-12 CN CNA2008101147807A patent/CN101289206A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009993A (en) * | 2010-12-15 | 2011-04-13 | 中国铝业股份有限公司 | Method for preparing submicron aluminium oxide by two-stage roasting method |
| CN103101949A (en) * | 2011-11-11 | 2013-05-15 | 雅宝研磨材(苏州)有限公司 | Preparation method of alpha-AL2O3 polishing powder |
| CN103101949B (en) * | 2011-11-11 | 2014-06-04 | 雅宝研磨材(苏州)有限公司 | Preparation method of alpha-AL2O3 polishing powder |
| CN103936044A (en) * | 2014-02-26 | 2014-07-23 | 贵州万方铝化科技开发有限公司 | Method for efficiently recycling fluoride in aluminum-containing compound preparation process |
| CN103936044B (en) * | 2014-02-26 | 2015-09-23 | 贵州天合国润高新材料科技有限公司 | Prepare efficient circulation in the process of aluminum contained compound and utilize the method for fluorochemical |
| CN104945959A (en) * | 2015-06-16 | 2015-09-30 | 泰安盛源粉体有限公司 | Preparation method of high-purity electric filler aluminium oxide for insulation |
| CN105668599A (en) * | 2016-01-14 | 2016-06-15 | 洛阳三睿宝纳米科技有限公司 | Nano-alumina polishing material and preparation method thereof |
| CN106006691A (en) * | 2016-01-14 | 2016-10-12 | 洛阳三睿宝纳米科技有限公司 | Nanoscale corundum material for metal hot spraying |
| CN106006691B (en) * | 2016-01-14 | 2018-03-30 | 洛阳三睿宝纳米科技有限公司 | A kind of metal thermal spraying nanometer-sized alumina material |
| CN107285348A (en) * | 2017-07-14 | 2017-10-24 | 杭州智华杰科技有限公司 | A kind of method that water quenching prepares Ultrafine Aluminium Oxide Particle |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20081022 |