CN108706618A - Utilize the method for micro-emulsion method for preparing nano aluminium oxide - Google Patents
Utilize the method for micro-emulsion method for preparing nano aluminium oxide Download PDFInfo
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- CN108706618A CN108706618A CN201810988637.4A CN201810988637A CN108706618A CN 108706618 A CN108706618 A CN 108706618A CN 201810988637 A CN201810988637 A CN 201810988637A CN 108706618 A CN108706618 A CN 108706618A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/34—Preparation of aluminium hydroxide by precipitation from solutions containing aluminium salts
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- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
- C01F7/441—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination
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- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
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- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
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- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
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- C01P2006/80—Compositional purity
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Abstract
The method that the present invention relates to the use of micro-emulsion method for preparing nano aluminium oxide, specially by carbon atom number in 20~150 long-chain organic matter and surfactant addition ethanol solution or the aqueous solution containing organic additive, stirring and emulsifying forms uniform lotion, then aluminium salt and precipitating reagent are instilled in 25-95 DEG C of heat preservation lotion, stirring fully reaction forms suspension, and filtering and washing obtains filter cake, dry, roasting obtains nano aluminium oxide.This method technological process is simple, technical process is short, at low cost, prepare that nano aluminium oxide particle diameter distribution is narrow, purity is high, large specific surface area, it is expected to realize the industrial production of high-grade nano aluminium oxide by the method, a kind of new technology path is provided for the preparation of nano aluminium oxide.
Description
Technical field
The invention belongs to Material Fields, relate to the use of the method for micro-emulsion method for preparing nano aluminium oxide.
Background technology
Aluminium oxide is most wide one of the functional material of 21 century yield maximum, output value highest, purposes.Nano aluminium oxide has
High rigidity, high intensity, wear-resistant, corrosion-resistant, high temperature resistant, anti-oxidant, good insulating, large specific surface area, coefficient of thermal expansion are small, anti-
The excellent characteristics such as thermal shock performance is good, dielectric loss is low can be used as coating, rubber, plastic wear-resisting hardening agent, fluorescent powder, lithium electricity
Pond diaphragm coating material, anode material of lithium battery additive, precise polished powder, Sapphire Substrate etc..Be widely used in insulating materials,
The high-tech tip such as electronic product, abrasion-proof corrosion-proof corrosion material and aerospace material industry.
Foreign countries are more early to the development of nano aluminium oxide relation technological researching, and technology is also more advanced, as the IgorL in the U.S. passes through
The nano aluminium oxide that vapor phase method is prepared, favorable dispersibility, particle diameter distribution is uniform, and agglomeration is not present；Japan Patent profit
With vaporization condensation process, it is evaporation source using high-purity alumina ceramic, prepares the higher nano aluminium oxide of purity.China is to nano oxygen
The research for changing aluminium begins one's study from the nineties in last century, although certain progress is achieved by years of researches, for industry
Production nano aluminium oxide be still within mostly grope, test, exploration stage, it is wider that most preparation methods can only obtain particle diameter distribution
Nano aluminium oxide, and poor reproducibility, therefore prepare the high nano aluminium oxide of small grain size, favorable dispersibility, purity there is weight
The economic value and practical value wanted.
Nano aluminium oxide preparation method is divided into solid phase method, vapor phase method, liquid phase method by material aggregation state：
By aluminium or aluminium salt grinding calcining, after solid phase reaction occurs, it is solid at present mainly to directly obtain nano aluminium oxide for solid phase method
Phase method is broadly divided into mechanical crushing method, thermal decomposition method, combustion method etc..Mechanical crushing method mainly utilizes ultrafine crusher that raw material is straight
It connects and is ground into superfine powder, prepare nano aluminium oxide using ball mill as usual, the method is easy to operate, of low cost, but prepares
Product cut size distribution is wide and pattern is inhomogenous；Thermal decomposition method directly utilizes aluminium salt in height by adding binder and comburant
The lower decomposition of temperature prepares nano aluminium oxide, wherein several typical methods such as AACH pyrolysismethods, chlorethanol method, improvement Bayer process etc., it should
Method production technology is relatively simple, product cut size is convenient for control, but product impurity is difficult to reject, pollutant discharge amount is big etc.；Combustion
Aluminium powder of the burning method using grain size less than 40 microns burns in oxygen and propane flame to prepare nano aluminium oxide, and the method is energy saving
It is time saving, polluted gas discharge is more during product purity is high, but combustion process is not easy to control and production process, increase production cost.
Vapor phase method is directly converted substance in the way of gas or by plasma, electric arc heated, electron beam heating etc.
For gas, elementary particle is formed by chemical reaction in the gas phase, particle is formed using nucleation, growth, wherein being broadly divided into
Vaporization condensation process and gas phase hydrolysis method.Vaporization condensation process refers to makes heating alumina evaporate in inert gas, then in indifferent gas
Cooling in body, condensation forms nano-particle, can be divided into plasma heating, electron beam heating, electricity according to the difference of mode of heating
Arc heating etc.；And aluminium salt is mainly carried out pyrohydrolysis by gas phase hydrolysis method in hydrogen, oxygen flame, generates nano-particle.Vapor phase method
The sample particle diameter of preparation is high convenient for control, the sample purity prepared, but the method is high to equipment requirement, be also easy to produce gaseous contamination,
High energy consumption is unfavorable for realizing large-scale production.
Liquid phase method is currently laboratory and the widely used method for preparing nano-powder of industrial production, and main includes precipitation
Method, sol-gel method, hydro-thermal method, microemulsion method etc..The precipitation method add appropriate precipitating reagent in material liquid, make in material liquid
Precipitate comes out aluminium ion in a variety of manners, and nano-particle is obtained subsequently through technical process such as washing, drying, roastings,
The method has many advantages, such as that at low cost, easy to operate, equipment is simple, technological process is short, but prepare sample particle diameter distribution it is wide,
Easily reunite etc.；Sol-gel method is to be studied in nano aluminium oxide and apply a kind of more method, mainly anti-by precipitating
The presoma of boehmite should be generated, then by washing, drying, roasting and etc. obtain nano aluminium oxide, the method is prepared
Organic solvent is used during sample dispersion is good, uniform particle diameter, purity are high, but manufacturing cost is high and preparation process, is also easy to produce secondary
Pollution increases environmental pollution and processing cost；Using some hydroxide under high temperature and pressure, solubility is more than hydro-thermal method in water
The solubility of its oxide, the precipitated oxide simultaneously when hydroxide is soluble in water, can effectively avoid subsequent sample processed
Hard aggregation caused by journey is effectively improved the dispersibility of nano-particle, prepares that sample particle diameter narrowly distributing, grain size be smaller, sample
Purity is high, and the method is higher to equipment requirement, the cost is relatively high；Microemulsion method make under Action of Surfactant two kinds mutually not
The two kinds of solvents to mix form thermodynamically stable isotropism, appearance transparent or translucent microemulsion system, by wherein
Drop microreactor can effectively control particle size, and it is uniform to prepare sample particle diameter.
On the basis of above method, this method proposes a kind of method of micro-emulsion method for preparing nano aluminium oxide.
Invention content
In view of this, one of the objects of the present invention is to provide the method using micro-emulsion method for preparing nano aluminium oxide, it should
Method is simple, and nano aluminium oxide particle diameter distribution obtained is narrow, purity is high, large specific surface area.
For achieving the above object, the present invention provides the following technical solutions：
Using the method for micro-emulsion method for preparing nano aluminium oxide, it is as follows：The length for being 20~150 by carbon atom number
Chain organic matter and surfactant are added in ethanol solution or aqueous solution containing organic additive, and stirring and emulsifying forms uniform breast
Then liquid instills aluminium salt and precipitating reagent in 25-95 DEG C of heat preservation lotion, stir fully reaction and form suspension, filtering and washing obtains
Dry to filter cake, roasting obtains nano aluminium oxide.
Preferably, the long-chain organic matter is any one in paraffin, stearic acid, Sodium stearate, paraffin crystallite；It is described
Surfactant is cetyl trimethylammonium bromide, PEG 20000, ethylenediamine tetra-acetic acid, polyvinylpyrrolidone
58000, dodecyl trimethyl ammonium bromide, polyethylene glycol 10000, polyethylene glycol 400, cetyl trimethyl sodium sulphate, ten
It is one or more in six alkyl trimethyl sodium sulfonates；The precipitating reagent be sodium carbonate, sodium bicarbonate, ammonium hydrogen carbonate, ammonium carbonate,
Any one of sodium hydroxide or ammonium hydroxide；The organic additive be ethylene glycol, glycerine, hexamethylene or oleic acid in one kind or
It is a variety of；The aluminium salt is ANN aluminium nitrate nonahydrate, aluminum sulfate or aluminium chloride.
Preferably, the ethanol solution is the ethanol solution of volume fraction 10%-80%.
Preferably, to be 2000-12000r/min in speed, temperature stirs 10- under the conditions of being 25-95 DEG C for the emulsification
60min。
Preferably, the aluminium salt drop speed is 2-40mL/min；Precipitating reagent drop speed is 2-40ml/min.
Preferably, the mixing speed that the suspension generates is 400-1000r/min.
Preferably, the drying dry 0.5-9h under the conditions of temperature is 40-90 DEG C.
Preferably, the roasting roasts 1-6h under the conditions of temperature is 500-1200 DEG C.
Preferably, long-chain organic matter：Surfactant：Aluminium salt：The mass ratio of organic additive is 1~8g：0.3~
5.0g：15-50g：1-20g：50~300mL；Or long-chain organic matter：Surfactant：Aluminium salt：The quality volume of ethanol water
Than for 1~8g：0.5~5.0g：15-50g：50~300mL.
The beneficial effects of the present invention are：The invention discloses the methods using micro-emulsion method for preparing nano aluminium oxide, will
Mixed solution (or the distilled water of distilled water and ethyl alcohol is added in the long-chain organic matter and surfactant that carbon atom number is 20~150
With in the mixed solution of organic additive) in, stir to form uniform lotion with certain rotating speed, by aluminium salt and precipitating reagent with certain
Drop speed instills in the A lotions of a certain temperature, and then fully reaction under agitation, forms suspension, filtering and washing obtains
Dry to filter cake, roasting obtains nano aluminium oxide.This method technological process is simple, technical process is short, at low cost, prepares nanometer
Alumina particle narrowly distributing, purity height, large specific surface area are expected to realize that the industry of high-grade nano aluminium oxide is raw by the method
Production, a kind of new technology path is provided for the preparation of nano aluminium oxide.
Description of the drawings
In order to keep the purpose of the present invention, technical solution and advantageous effect clearer, the present invention provides following attached drawing and carries out
Explanation：
Fig. 1 is to prepare nano aluminium oxide flow chart.
Fig. 2 is that sample SEM schemes (A：Nano aluminium oxide is made in the method for the present invention；B：Nano aluminium oxide is made in solid phase method).
Fig. 3 is that nano aluminium oxide nitrogen adsorption-desorption isotherm figure is made.
Specific implementation mode
Below in conjunction with attached drawing, the preferred embodiment of the present invention is described in detail.
Embodiment 1
Using the method for micro-emulsion method for preparing nano aluminium oxide, synthetic route is as shown in Figure 1, be as follows：It weighs
2g paraffin and 0.5g polyvinylpyrrolidones (Mw=58000) and cetyl trimethylammonium bromide compound (in mass ratio 4:1
~3) it is added in 100mL ethanol waters (volume fraction 10%), is stirred at 80 DEG C with 5000r/min mixing speeds
60min is emulsified, and is formed A lotions, is kept the temperature at 75 DEG C；It weighs 37.5g ANN aluminium nitrate nonahydrates and 16g sodium carbonate is dissolved in respectively
In 100mL distilled water, ANN aluminium nitrate nonahydrate solution and sodium carbonate liquor are instilled in A lotions simultaneously with 10mL/min, 500r/min
Mixing speed stirs 60min, forms B suspension, filtering and washing, and last time washing is washed with absolute ethyl alcohol, obtains filter cake,
Oven drying 2h at 60 DEG C obtains grain size 100nm nano aluminium oxides then in 800 DEG C of roasting 3h of Muffle furnace.
Embodiment 2
Using the method for micro-emulsion method for preparing nano aluminium oxide, it is as follows：Weigh 4g paraffin and 0.5g polyethylene
Pyrrolidones (Mw=58000) and cetyl trimethylammonium bromide compound (in mass ratio 4:1~3) 100mL ethyl alcohol is added
In aqueous solutions (volume fraction 10%), 60min emulsifications are stirred at 80 DEG C with 5000r/min mixing speeds, form A lotions,
It is kept the temperature at 75 DEG C.It weighs 37.5g ANN aluminium nitrate nonahydrates and 16g sodium carbonate is dissolved in respectively in 100mL distilled water, nine nitric hydrates
Aluminum solutions and sodium carbonate liquor are instilled in A lotions simultaneously with 10mL/min, and 500r/min mixing speeds stir 60min, and it is outstanding to form B
Supernatant liquid, filtering and washing, last time washing are washed with absolute ethyl alcohol, obtain filter cake, the oven drying 2h at 60 DEG C, then in horse
Not 800 DEG C of roasting 3h of stove, obtain grain size 130nm nano aluminium oxides.
Embodiment 3
Using the method for micro-emulsion method for preparing nano aluminium oxide, it is as follows：Weigh 4g paraffin and 0.5g polyethylene
Pyrrolidones (Mw=58000) and cetyl trimethyl sodium sulphate compound (in mass ratio 4:1~3) 100mL00mL is added
In ethanol water (volume fraction 10%), 60min emulsifications are stirred at 80 DEG C with 5000r/min mixing speeds, form A breasts
Liquid is kept the temperature at 75 DEG C；It weighs 37.5g ANN aluminium nitrate nonahydrates and 16g sodium carbonate is dissolved in respectively in 100mL distilled water, nine hydrations
Aluminum nitrate solution and sodium carbonate liquor are instilled in A lotions simultaneously with 10mL/min, and 500r/min mixing speeds stir 60min, shape
At B suspension, filtering and washing, last time washing is washed with absolute ethyl alcohol, obtains filter cake, the oven drying 2h at 60 DEG C, with
Afterwards in 800 DEG C of roasting 3h of Muffle furnace, grain size 80nm nano aluminium oxides are obtained.
Embodiment 4
Weigh 4g paraffin and 0.5g polyvinylpyrrolidones (Mw=58000) and cetyl trimethylammonium bromide compound
(in mass ratio 4:1~3) (volume ratio 98 in 100mL distilled water and ethylene glycol mixed solution is added:2~15), with 5000r/min
Mixing speed stirs 60min emulsifications at 80 DEG C, forms A lotions, is kept the temperature at 75 DEG C.Weigh 37.5g ANN aluminium nitrate nonahydrates and
16g sodium carbonate is dissolved in respectively in 100mL distilled water, and ANN aluminium nitrate nonahydrate solution and sodium carbonate liquor are instilled simultaneously with 10mL/min
In A lotions, 500r/min mixing speeds stir 60min, form B suspension, filtering and washing, last time washing absolute ethyl alcohol
Washing, obtains filter cake, the oven drying 2h at 60 DEG C, then in 800 DEG C of roasting 3h of Muffle furnace, obtains grain size 150nm nano oxygens
Change aluminium.
In above-described embodiment, the carbon atom numbers such as paraffin stearic acid, Sodium stearate, paraffin crystallite, which are 20~150 long-chains, to be had
Machine object is replaced, and surfactant polyvinylpyrrolidone (Mw=58000) and cetyl trimethylammonium bromide can be used
Polyethylene glycol (Mw=20000), dodecyl trimethyl ammonium bromide, polyethylene glycol (Mw=10000), gathers ethylenediamine tetra-acetic acid
It lives on one or more surfaces in ethylene glycol (Mw=400), cetyl trimethyl sodium sulphate, cetyl trimethyl sodium sulfonate
Property agent replace.ANN aluminium nitrate nonahydrate can use any one aluminium salt in aluminum sulfate or aluminium chloride to replace；Sodium carbonate can use carbon
Any one precipitating reagent in sour hydrogen sodium, ammonium hydrogen carbonate, ammonium carbonate, sodium hydroxide, ammonium hydroxide is replaced；Ethylene glycol can use the third three
The organic additives such as alcohol, hexamethylene, oleic acid are replaced；Long-chain organic matter：Surfactant：Aluminium salt：The mass ratio of organic additive
For 1~8g：1.0~5.0g：15-50g：1-20g：50~300mL；Or long-chain organic matter：Surfactant：Aluminium salt：Ethanol water
The mass volume ratio of solution is 1~8g：0.5~5.0g：15-50g：50~300mL；Emulsification low whipping speed is 2000-
12000r/min, temperature stir 10-60min under the conditions of being 25-95 DEG C；Aluminium salt drop speed is 2-40mL/min；Precipitating reagent drips speed
2-40ml/min, A lotion holding temperature are 25-95 DEG C；A lotion liquid mixing speeds are 400-1000r/min；Filtration cakes torrefaction is in temperature
Degree dry 0.5-9h under the conditions of being 40-90 DEG C, filter cake roasting roast 1-6h under the conditions of temperature is 500-1200 DEG C, and ethyl alcohol is water-soluble
Liquid is that goal of the invention can be achieved in volume fraction 10%-80% ethanol solutions.
Fig. 2 is obtained sample SEM figures, and as a contrast with Solid phase synthesis nano aluminium oxide.The results show that system of the present invention
The material obtained is alumina in Nano level, and particle is uniform.
Fig. 3 is that nano aluminium oxide nitrogen adsorption-desorption isotherm figure is made, and is reached through measuring the obtained specific surface area of the present invention
184m2/ g is higher than solid phase method specific surface area 154m2/g。
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (9)
1. utilizing the method for micro-emulsion method for preparing nano aluminium oxide, which is characterized in that be as follows：It is 20 by carbon atom number
In~150 long-chain organic matter and surfactant addition ethanol solution or the aqueous solution containing organic additive, stirring and emulsifying shape
At uniform lotion, then aluminium salt and precipitating reagent are instilled in 25-95 DEG C of heat preservation lotion, fully reaction is stirred and forms suspension,
Filtering and washing obtains filter cake, dry, and roasting obtains nano aluminium oxide.
2. the method for utilizing micro-emulsion method for preparing nano aluminium oxide according to claim 1, it is characterised in that：The long-chain has
Machine object is any one in paraffin, stearic acid, Sodium stearate, paraffin crystallite；The surfactant is cetyl front three
Base ammonium bromide, PEG 20000, ethylenediamine tetra-acetic acid, polyvinylpyrrolidone 58000, dodecyl trimethyl ammonium bromide,
Polyethylene glycol 10000, polyethylene glycol 400, cetyl trimethyl sodium sulphate, one kind in cetyl trimethyl sodium sulfonate or
It is a variety of；The precipitating reagent is any one of sodium carbonate, sodium bicarbonate, ammonium hydrogen carbonate, ammonium carbonate, sodium hydroxide or ammonium hydroxide；Institute
It is one or more in ethylene glycol, glycerine, hexamethylene or oleic acid to state organic additive；The aluminium salt is nine nitric hydrates
Aluminium, aluminum sulfate or aluminium chloride.
3. the method for utilizing micro-emulsion method for preparing nano aluminium oxide according to claim 1, it is characterised in that：The ethyl alcohol is molten
Liquid is the ethanol solution of volume fraction 10%-80%.
4. the method for utilizing micro-emulsion method for preparing nano aluminium oxide according to claim 1, it is characterised in that：The emulsification is
It is 2000-12000r/min in speed, temperature stirs 10-60min under the conditions of being 25-95 DEG C.
5. the method for utilizing micro-emulsion method for preparing nano aluminium oxide according to claim 1, it is characterised in that：The aluminium salt drop
Speed is 2-40mL/min；Precipitating reagent drop speed is 2-40ml/min.
6. the method for utilizing micro-emulsion method for preparing nano aluminium oxide according to claim 1, it is characterised in that：The suspension
The mixing speed of generation is 400-1000r/min.
7. the method for utilizing micro-emulsion method for preparing nano aluminium oxide according to claim 1, it is characterised in that：The drying is
Dry 0.5-9h under the conditions of temperature is 40-90 DEG C.
8. the method for utilizing micro-emulsion method for preparing nano aluminium oxide according to claim 1, it is characterised in that：The roasting exists
Temperature roasts 1-6h under the conditions of being 500-1200 DEG C.
9. the method for utilizing micro-emulsion method for preparing nano aluminium oxide according to claim 1, it is characterised in that：Long-chain is organic
Object：Surfactant：Aluminium salt：The mass ratio of organic additive is 1~8g：1.0~5.0g：15-50g：1-20g：50~
300mL；Or long-chain organic matter：Surfactant：Aluminium salt：The mass volume ratio of ethanol water is 1~8g：0.5~5.0g：
15-50g：50~300mL.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110643409A (en) * | 2019-09-27 | 2020-01-03 | 国网四川省电力公司电力科学研究院 | Modified transformer oil and preparation method thereof |
| CN113698183A (en) * | 2021-08-27 | 2021-11-26 | 湖州南木纳米科技有限公司 | Carbon-coated alumina ceramic material and preparation method and application thereof |
| CN117985748A (en) * | 2024-04-03 | 2024-05-07 | 山东吉润纳米新材料有限公司 | High-purity alumina and preparation method thereof |
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| CN102303882A (en) * | 2011-08-16 | 2012-01-04 | 桂林理工大学 | Method for preparing alpha-Al2O3 powder from microemulsion |
| CN102390852A (en) * | 2011-08-16 | 2012-03-28 | 桂林理工大学 | Method for preparing high-purity superfine Alpha-Al2O3 powder from microemulsion |
| CN105271319A (en) * | 2015-10-28 | 2016-01-27 | 内江师范学院 | Method for preparing nanometer MgO |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102303882A (en) * | 2011-08-16 | 2012-01-04 | 桂林理工大学 | Method for preparing alpha-Al2O3 powder from microemulsion |
| CN102390852A (en) * | 2011-08-16 | 2012-03-28 | 桂林理工大学 | Method for preparing high-purity superfine Alpha-Al2O3 powder from microemulsion |
| CN105271319A (en) * | 2015-10-28 | 2016-01-27 | 内江师范学院 | Method for preparing nanometer MgO |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110643409A (en) * | 2019-09-27 | 2020-01-03 | 国网四川省电力公司电力科学研究院 | Modified transformer oil and preparation method thereof |
| CN113698183A (en) * | 2021-08-27 | 2021-11-26 | 湖州南木纳米科技有限公司 | Carbon-coated alumina ceramic material and preparation method and application thereof |
| CN117985748A (en) * | 2024-04-03 | 2024-05-07 | 山东吉润纳米新材料有限公司 | High-purity alumina and preparation method thereof |
| CN117985748B (en) * | 2024-04-03 | 2024-06-04 | 山东吉润纳米新材料有限公司 | High-purity alumina and preparation method thereof |
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