CN102674418A - Method for preparing high-purity alumina particles - Google Patents
Method for preparing high-purity alumina particles Download PDFInfo
- Publication number
- CN102674418A CN102674418A CN2012101789576A CN201210178957A CN102674418A CN 102674418 A CN102674418 A CN 102674418A CN 2012101789576 A CN2012101789576 A CN 2012101789576A CN 201210178957 A CN201210178957 A CN 201210178957A CN 102674418 A CN102674418 A CN 102674418A
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- Prior art keywords
- high purity
- aluminium oxide
- purity alumina
- purity aluminium
- oxide particle
- 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 115
- 239000002245 particle Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 23
- 239000000758 substrate Substances 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 9
- 238000003801 milling Methods 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 238000010298 pulverizing process Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229910052594 sapphire Inorganic materials 0.000 description 4
- 239000010980 sapphire Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Crystals, And After-Treatments Of Crystals (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention relates to a method for preparing high-purity alumina particles. The method comprises the following steps of: feeding high-purity alumina powder into an air-stream mill and crushing; putting the crushed powder into a turntable ball forming mill, and adhering and growing particles of the high-purity alumina powder by the continuously rotating a ball-forming plate to obtain high-purity alumina particle green bodies; and roasting the high-purity alumina particle green bodies to obtain the high-purity alumina particles. Equipment used in the method is simple, and is easy to operate and low in manufacturing cost. The process for preparing the high-purity alumina particles is simple and practical, the purity of the prepared high-purity alumina particles is more than or equal to 99.999 percent, the prepared alumina particles are smooth in appearance, uniform in particle size, and high in sphericity and mechanical strength; and the apparent density of the alumina particles is more than 2.0g/cm<3>.
Description
Technical field
The present invention relates to a kind of high purity aluminium oxide particulate preparation method, particularly directly process the high purity aluminium oxide molding particles method that makes by high purity alumina powder.Belong to the powder preparation field.
Background technology
High purity aluminium oxide is meant purity greater than 99.999% aluminum oxide, and high purity aluminium oxide and goods thereof are widely used in fields such as sapphire single-crystal, transparent polycrystalline ceramics, YAG, LED, light-storing material, luminescent material, refractory materials and abrasive substance.In recent years, along with the develop rapidly of LED industry, increasing with the demand of substrate material sapphire single-crystal on the market to LED.In order to produce more better sapphire single-crystals, manufacturer is also increasingly high to the quality requirements of sapphire starting material alumina block both at home and abroad.Not only require its purity to reach 5N (99.999%) standard, the filling ratio of unit volume is also had higher requirement.The high purity aluminium oxide particle can carry out rule easily and pile up when guaranteeing that product purity requires, and improves the filling ratio of material, meets the need of market.
At present, the alumina particle purity of preparation is low both at home and abroad, loose density is little, and alumina particle moulding process complicated operation, has increased the expense of preparation and the difficulty of realization to a great extent.
Summary of the invention
The object of the invention is to overcome present preparing method's defective, and providing a kind of is raw material processing and preparing high purity aluminium oxide molding particles method with the high purity alumina powder.
The object of the invention is achieved through following technical proposals: with pulverizing in the high purity alumina powder input air flow mill, can effectively solve the agglomeration of powder, help moulding process.Powder granularity after the processing is put into the rotating disc type nodulizer to 2-3 μ m, through the continuous rotation of pan-pelletizer, makes that the high purity alumina powder particle is adhered to one another grows up, and grows into high purity aluminium oxide particle base substrate.When the diameter of particle base substrate reaches 0.5-3mm, just can from pan-pelletizer, take out.At last, with high purity aluminium oxide particle base substrate under 1400 ℃-1600 ℃ through roasting in 4-5 hour, obtain the high purity aluminium oxide particle.
The equipment that the present invention uses is simple, and easy handling is cheap.Prepare high purity aluminium oxide particle features simple and practical process with this method, high purity aluminium oxide particle purity>=99.999% behind the sintering, smooth in appearance, good sphericity, epigranular, physical strength is high, and its loose density is greater than 2.0g/cm
3
Embodiment
Below in conjunction with embodiment the present invention is done further description:
Embodiment one
Using purity is that 99.999% high purity alumina powder is raw material, and after airflow milling was pulverized, powder granularity was to 2-3 μ m.This powder is put into the rotating disc type nodulizer, and setting the rotating disk angle of inclination and be 45 °, rotating speed is 25r/min, and rolling and being formed into high purity aluminium oxide particle base substrate diameter is 0.5-3mm, takes out the high purity aluminium oxide crucible of packing into, sends into kiln and carries out roasting.Under 1400 ℃ sintering temperature roasting 4-5 hour, obtain after the cooling that purity is not less than 99.999%, loose density is 1.82g/cm
3The high purity aluminium oxide particle.
Embodiment two
Using purity is that 99.999% high purity alumina powder is raw material, and after airflow milling was pulverized, powder granularity was to 2-3 μ m.This powder is put into the rotating disc type nodulizer, and setting the rotating disk angle of inclination and be 45 °, rotating speed is 25r/min, and rolling and being formed into high purity aluminium oxide particle base substrate diameter is 0.5-3mm, takes out the high purity aluminium oxide crucible of packing into, sends into kiln and carries out roasting.Under 1500 ℃ sintering temperature roasting 4-5 hour, obtain after the cooling that purity is not less than 99.999%, loose density is 2.15g/cm
3The high purity aluminium oxide particle.
Embodiment three
It is that 99.999% high purity alumina powder is raw material that embodiment three uses purity, and after airflow milling was pulverized, powder granularity was to 2-3 μ m.This powder is put into the rotating disc type nodulizer, and setting the rotating disk angle of inclination and be 45 °, rotating speed is 25r/min, and rolling and being formed into high purity aluminium oxide particle base substrate diameter is 0.5-3mm, takes out the high purity aluminium oxide crucible of packing into, sends into kiln and carries out roasting.Under 1600 ℃ sintering temperature roasting 4-5 hour, obtain after the cooling that purity is not less than 99.999%, loose density is 2.30g/cm
3The high purity aluminium oxide particle.
Claims (6)
1. high purity aluminium oxide particulate preparation method, this method is: with pulverizing in the high purity alumina powder input air flow mill, put into the rotating disc type nodulizer after the pulverizing; Continuous rotation through pan-pelletizer; Make that the high purity alumina powder particle is adhered to one another grows up, grow into high purity aluminium oxide particle base substrate, from pan-pelletizer, take out then; With the roasting of high purity aluminium oxide particle base substrate, obtain the high purity aluminium oxide particle at last.
2. preparation method according to claim 1 is characterized in that: the high purity alumina powder granularity of pulverizing through airflow milling is to 2-3 μ m.
3. preparation method according to claim 2 is characterized in that: high purity alumina powder is grown into the high purity aluminium oxide particle base substrate that diameter reaches 0.5-3mm through after the continuous rotation of pan-pelletizer.
4. preparation method according to claim 3 is characterized in that: with said high purity aluminium oxide particle base substrate under 1400 ℃-1600 ℃ through roasting in 4-5 hour, obtain the high purity aluminium oxide particle.
5. according to claim 1 or 4 described preparing methods, it is characterized in that: described roasting is with the high purity aluminium oxide particle high purity aluminium oxide crucible of packing into, sends into kiln and carries out roasting.
6. according to claim 1 or 3 described preparing methods, it is characterized in that: said rotating disc type nodulizer, setting the rotating disk angle of inclination and be 45 °, rotating speed is 25r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101789576A CN102674418A (en) | 2012-05-24 | 2012-05-24 | Method for preparing high-purity alumina particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101789576A CN102674418A (en) | 2012-05-24 | 2012-05-24 | Method for preparing high-purity alumina particles |
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| Publication Number | Publication Date |
|---|---|
| CN102674418A true CN102674418A (en) | 2012-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101789576A Pending CN102674418A (en) | 2012-05-24 | 2012-05-24 | Method for preparing high-purity alumina particles |
Country Status (1)
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| CN (1) | CN102674418A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104477954A (en) * | 2014-11-21 | 2015-04-01 | 连云港乐园新材料科技有限公司 | Preparation method of alumina particles |
| CN105130404A (en) * | 2015-08-14 | 2015-12-09 | 山东晶鑫晶体科技有限公司 | High-purity alumina grinding ball production method |
| CN107337223A (en) * | 2017-08-04 | 2017-11-10 | 大连交通大学 | The water quenching preparation technology of high purity aluminium oxide particle |
| CN113264543A (en) * | 2021-04-14 | 2021-08-17 | 雅安百图高新材料股份有限公司 | Control method for maximum particle size of spherical alumina |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1463251A (en) * | 2001-05-30 | 2003-12-24 | 昭和电工株式会社 | Alumina particle and method for producing same |
| CN101205628A (en) * | 2006-12-18 | 2008-06-25 | 庄育丰 | Sapphire Crystal Growth Method |
| JP2011126773A (en) * | 2009-11-20 | 2011-06-30 | Sumitomo Chemical Co Ltd | alpha-ALUMINA FOR PRODUCING SINGLE CRYSTAL SAPPHIRE |
-
2012
- 2012-05-24 CN CN2012101789576A patent/CN102674418A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1463251A (en) * | 2001-05-30 | 2003-12-24 | 昭和电工株式会社 | Alumina particle and method for producing same |
| CN101205628A (en) * | 2006-12-18 | 2008-06-25 | 庄育丰 | Sapphire Crystal Growth Method |
| JP2011126773A (en) * | 2009-11-20 | 2011-06-30 | Sumitomo Chemical Co Ltd | alpha-ALUMINA FOR PRODUCING SINGLE CRYSTAL SAPPHIRE |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104477954A (en) * | 2014-11-21 | 2015-04-01 | 连云港乐园新材料科技有限公司 | Preparation method of alumina particles |
| CN105130404A (en) * | 2015-08-14 | 2015-12-09 | 山东晶鑫晶体科技有限公司 | High-purity alumina grinding ball production method |
| CN107337223A (en) * | 2017-08-04 | 2017-11-10 | 大连交通大学 | The water quenching preparation technology of high purity aluminium oxide particle |
| CN107337223B (en) * | 2017-08-04 | 2019-04-30 | 大连交通大学 | Preparation technology of high-purity alumina particles by water quenching method |
| CN113264543A (en) * | 2021-04-14 | 2021-08-17 | 雅安百图高新材料股份有限公司 | Control method for maximum particle size of spherical alumina |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120919 |