Preparation method of alpha-type nano aluminum oxide particle

An aluminum oxide and nanotechnology, which is applied in the directions of alumina/aluminum hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of difficult control of conditions, high production cost, complex synthesis process, etc., and achieve easy control of conditions and cost. Low, simple process effect

Inactive Publication Date: 2013-03-06
LUOYANG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above methods have the disadvantages of relatively complex synthesis process, difficult control of conditions, high production cost, high energy consumption, serious environmental pollution, narrow application range and long production cycle, and are not easy for industrial production.

Method used

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  • Preparation method of alpha-type nano aluminum oxide particle

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Embodiment 1

[0019] Step 1. Take 5% aluminum sulfate octadecahydrate and 95% sulfuric acid solution with a concentration of 1.0mol / L according to the mass percentage, use the sulfuric acid solution as a dispersant, add aluminum sulfate octadecahydrate to the dispersant and stir until completely dissolved , prepared aluminum dispersion solution 75mL, set aside.

[0020] Step 2: Add 4.2 g of sodium hydroxide to 75 mL of distilled water, stir until completely dissolved, and prepare a sodium hydroxide solution with a concentration of 1.40 mol / L, heat to 97° C., and set aside.

[0021] Step 3, transfer the aluminum dispersion solution prepared in step 1 to a three-necked flask, and then place the three-necked flask with the aluminum dispersion in a reflux device of a glycerin bath to heat at 95°C; Add the sodium hydroxide solution prepared in step 2 into the aluminum dispersion solution at a stirring speed, a white precipitate is formed, and reflux at a stirring speed of 1000 rpm for 8 hours to...

Embodiment 2

[0024] Step 1. Take 40% aluminum chloride hexahydrate and 60% hydrochloric acid solution with a concentration of 3.0mol / L according to the mass percentage, use the hydrochloric acid solution as a dispersant, add aluminum chloride hexahydrate to the dispersant and stir until completely dissolved , prepared aluminum dispersion solution 75mL, set aside.

[0025] Step 2: Take 1.6 g of sodium hydroxide and add it to 75 mL of distilled water, stir until completely dissolved, and prepare a sodium hydroxide solution with a concentration of 0.533 mol / L, heat to 100 ° C, and set aside.

[0026] Step 3, transfer the aluminum dispersion solution prepared in step 1 to a three-necked flask, then place the three-necked flask with the aluminum dispersion in a reflux device in a glycerin bath and heat to 100°C; at 1500 rpm At a stirring speed of 1500 rpm, the sodium hydroxide solution prepared in step 2 was added to the aluminum dispersion solution, and a white precipitate was formed, which wa...

Embodiment 3

[0029] Step 1. Take 30% aluminum nitrate and 70% nitric acid solution with a concentration of 2.0mol / L according to the mass percentage, use the nitric acid solution as a dispersant, add aluminum nitrate to the dispersant and stir until completely dissolved, and then prepare an aluminum dispersion solution 75mL, spare.

[0030] Step 2: Add 2.4 g of sodium hydroxide to 75 mL of distilled water, stir evenly until completely dissolved, then prepare a sodium hydroxide solution with a concentration of 0.80 mol / L, heat to 98° C., and set aside.

[0031] Step 3, transfer the aluminum dispersion solution prepared in step 1 to a three-necked flask, then place the three-necked flask with the aluminum dispersion in a reflux device in a glycerin bath and heat it to 98°C; at 1200 rpm At a stirring speed of 1200 rpm, the sodium hydroxide solution prepared in step 2 was added to the aluminum dispersion solution, and a white precipitate was formed, which was refluxed for 9 hours at a stirring...

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Abstract

The invention discloses a preparation method of an alpha-type nano aluminum oxide particle. The preparation method comprises the following steps of: using an inorganic acid solution as a dispersing agent; adding an aluminum source into the dispersing agent to be stirred till being completely dissolved so as to prepare an aluminum dispersing solution; subsequently transferring the aluminum dispersing solution into a three-neck flask; putting the three-neck flask with the aluminum dispersing solution into a reflux unit of glycerol bath to be heated to 95-100 DEG C; under the stirring condition, adding a prepared sodium hydroxide solution into the aluminum dispersing solution; generating white precipitate; refluxing for 8-10 hours at a stirring speed of 1000-1500 turns/min so as to obtain a mixture with the white precipitate; and finally centrifuging, washing and drying the mixture with the white precipitate in vacuum so as to obtain a substance, namely, the alpha-type nano aluminum oxide particle. The preparation method is simple in process, safe, pollution-free, low in cost and convenient to produce in large scale, and the alpha-type nano aluminum oxide particle is a while nano particle which is in alpha-Al2O3 configuration and the crystal particle size is 25-35nm, and the specific surface area is 60-90m<2>/g.

Description

technical field [0001] The invention relates to a method for preparing nanometer materials, in particular to a method for preparing α-type nano-alumina particles. Background technique [0002] Nano-alumina has the characteristics of small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect due to its large specific surface area, large number of surface atoms, and sharp increase in surface energy with the decrease of particle size, so that nanoparticles Many new properties different from conventional materials have emerged. There are many crystal forms of aluminum oxide, among which α-type nano aluminum oxide is commonly known as corundum, which is the main component of ceramics. At the same time, the α-type nano-alumina has stable crystal phase, high hardness and good dimensional stability. It can be widely used in the reinforcement and toughening of various plastics, rubber and ceramic products, especially to improve the compactness, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02B82Y30/00
Inventor 冯勋李冠峰尹卫东郭文博王利亚
Owner LUOYANG NORMAL UNIV
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