Preparing method of nanometer aluminium oxide

A nano-alumina and sodium hydroxide technology, which is applied in the fields of alumina/aluminum hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of slow progress, high price, and long preparation cycle of nano-alumina powder preparation technology

Inactive Publication Date: 2014-07-09
KAIFENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing methods for preparing nano-alumina mostly use expensive aluminum alkoxides and surfactants as raw materials, the process is complicated, the preparation cycle is long, and some require high-temperature and high-pressure hydrothermal reaction conditions. Howe

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Measure 100 mL of 1 mol / L aluminum chloride solution into a beaker, add 1.5 mL of acetylacetone solution chelating agent and stir for 10-20 min, then slowly add 300 mL of 1 mol / L sodium hydroxide dropwise solution, stirred and reacted for 30 min, until the reaction was complete, the precipitate was filtered and washed with distilled water, and after drying at a temperature of 100 °C, an aluminum hydroxide gel was prepared, and the obtained gel was roasted at a temperature of 1000 °C After 3-5 hours, cool down to room temperature, take it out and grind it finely to obtain α-type nano-alumina. The results of transmission electron microscopy show that the particle size of the prepared nano-alumina is 3-15 nm.

Embodiment 2

[0022] Measure 100 mL of 1 mol / L aluminum nitrate solution into a beaker, add 2 mL of acetylacetone solution chelating agent and stir for 10-20 min, then slowly add 300 mL of 1 mol / L sodium hydroxide solution drop by drop , stirred and reacted for 30 min, until the reaction was complete, the precipitate was filtered and washed with distilled water, and dried at a temperature of 100 °C to obtain an aluminum hydroxide gel, which was calcined at a temperature of 1000 °C for 3 -5 hours, cool to room temperature, take out and grind finely to obtain α-type nano-alumina. The results of transmission electron microscopy show that the particle size of the prepared nano-alumina is 3-15 nm.

Embodiment 3

[0024] Measure 100 mL of 1 mol / L aluminum chloride solution into a beaker, add 2.5 mL of acetylacetone solution chelating agent and stir for 10-20 min, then slowly add 300 mL of 1 mol / L sodium hydroxide dropwise solution, stirred and reacted for 30 min, until the reaction was complete, the precipitate was filtered and washed with distilled water, and after drying at a temperature of 100 °C, an aluminum hydroxide gel was prepared, and the obtained gel was roasted at a temperature of 1000 °C After 3-5 hours, cool down to room temperature, take it out and grind it finely to obtain α-type nano-alumina. The results of transmission electron microscopy show that the particle size of the prepared nano-alumina is 3-15 nm.

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Abstract

A preparing method of nanometer aluminium oxide is provided. The method includes: dissolving an aluminum salt into distilled water, adding a proper amount of a chelating agent, reacting under stirring for 10-20 min to obtain a wine-red transparent solution containing an aluminium ion chelate, adding dropwise and slowly a sodium hydroxide solution with a molar ratio of Al<3+> to OH<-> being 1:3, and reacting under stirring for 30 min until the reaction is finished, washing the precipitate with distilled water, drying the precipitate at 100 DEG C to obtain aluminium hydroxide gel, subjecting the aluminium hydroxide gel to high-temperature processing for 3-5 h, cooling the aluminium hydroxide gel to room temperature, taking out and grinding to obtain the nanometer aluminium oxide having a particle size of 3-15 nm. The method has characteristics of mild preparation conditions, simple process, easy operation, cheap and easily available raw materials and low cost. The prepared aluminum oxide is high in purity and stable in property, and is widely applied.

Description

technical field [0001] The invention relates to a preparation method of nano products, in particular to a preparation method of nano alumina. Background technique [0002] Nano-alumina powder is one of the special functional nano-materials with important application value and development prospect. Nano-alumina has good thermal, optical, electrical, magnetic and chemical properties due to the surface effect, quantum size effect, volume effect, and macroscopic quantum tunneling effect, as well as high chemical activity and high A series of excellent properties such as chemical stability, thermal stability, high hardness and corrosion resistance. It is widely used in artificial gemstones, reagents, catalyst carriers, luminescent materials, electronic ceramic substrates, and aerospace fields. [0003] Since Bugosh first reported the preparation method of nano-alumina in 1961 (Bugosh J.J Chem Phys 1961; 65:1789), people have continuously developed innovative methods for prepari...

Claims

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Application Information

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IPC IPC(8): C01F7/02B82Y30/00
Inventor 陈永赵辉王丽孙瑞敏
Owner KAIFENG UNIV
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