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Ultrasonic synthesis method of nano-alumina and application thereof

A nano-alumina, ultrasonic synthesis technology, applied in the field of chemical materials, can solve the problems of large investment in gas phase method equipment, complicated operation, and difficult to control the particle size of the generated particles.

Inactive Publication Date: 2015-11-18
HENGSHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid-phase method is simple to operate, but it is difficult to control the particle size of the generated particles; the gas-phase method requires a large investment in equipment and complicated operation, so the liquid-phase method is more widely used

Method used

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  • Ultrasonic synthesis method of nano-alumina and application thereof
  • Ultrasonic synthesis method of nano-alumina and application thereof
  • Ultrasonic synthesis method of nano-alumina and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare 0.1mol / L Al(NO 3 ) 3 solution and 0.3mol / L NH 4 HCO 3 solution. Take the prepared 0.1mol / L Al(NO 3 ) 3 solution, add a small amount of PEG300, stir vigorously, and mix evenly to obtain a mixed solution; another 0.3mol / L NH 4 HCO 3 solution, will mix the solution and NH 4 HCO 3 The solutions were placed in a water bath at 40°C for 15 minutes at a constant temperature, and then NH 4 HCO 3 The solution was added into the mixed solution and mixed, and the pH was measured to be 8.08, and ultrasonicated in an ultrasonic field with a frequency of 20 kHz and a power of 100 w for 30 minutes. After the ultrasonic wave is over, remove the sample, filter it after aging for 24 hours, discard the filtrate, wash the precipitate with absolute ethanol and ammonia water respectively, dry at 100°C for 1 hour, put it into a crucible, set the temperature at 500°C, and calcinate for 1.5 hours. Cool naturally with the furnace to get rod-shaped γ-Al 2 o 3 and conglomerates...

Embodiment 2

[0030] Prepare 0.1mol / L Al(NO 3 ) 3 solution and 0.3mol / L NH 4 HCO 3 solution. Take the prepared 0.1mol / L Al(NO 3 ) 3 solution, add a small amount of PEG300, stir vigorously, and mix evenly to obtain a mixed solution; another 0.3mol / L NH 4 HCO 3 solution, will mix the solution and NH 4 HCO 3 The solutions were placed in a water bath at 40°C for 15 minutes at a constant temperature, and then NH 4 HCO 3 The solution was added into the mixed solution and mixed, and the pH was measured to be 8.08, and ultrasonicated in an ultrasonic field with a frequency of 20 kHz and a power of 100 w for 30 minutes. After the ultrasound is finished, remove the sample, filter after aging for 24 hours, discard the filtrate, wash the precipitate once with absolute ethanol and ammonia water, dry at 100°C for 1 hour, put it into a crucible, set the temperature at 700°C, and calcinate for 1.5 hours. Cool naturally with the furnace to get rod-shaped γ-Al 2 o 3 and conglomerates.

Embodiment 3

[0032] Prepare 0.1mol / L Al(NO 3 ) 3 solution and 0.3mol / L NH 4 HCO 3solution. Take the prepared 0.1mol / L Al(NO 3 ) 3 solution, add a small amount of PEG300, stir vigorously, and mix evenly to obtain a mixed solution; another 0.3mol / L NH 4 HCO 3 solution, will mix the solution and NH 4 HCO 3 The solutions were placed in a water bath at 40°C for 15 minutes at a constant temperature, and then NH 4 HCO 3 The solution was added into the mixed solution and mixed, and the pH was measured to be 8.08, and ultrasonicated in an ultrasonic field with a frequency of 20 kHz and a power of 100 w for 30 minutes. After the ultrasound is finished, remove the sample, filter after aging for 24 hours, discard the filtrate, wash the precipitate once with absolute ethanol and ammonia water, dry at 100°C for 1 hour, put it into a crucible, set the temperature at 900°C, and calcinate for 1.5 hours. Cool naturally with the furnace to get rod-shaped γ-Al 2 o 3 .

[0033] Set the temperatur...

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Abstract

The invention discloses an ultrasonic synthesis method of nano-alumina. The method includes: taking Al(NO3)3 as the raw material, using NH4HCO3 as the precipitating agent, conducting ultrasonic treatment and then performing calcination to prepare a precursor, thus obtaining nano-alumina. According to the ultrasonic synthesis method of nano-alumina provided by the invention, the ultrasonic parameters are controlled to affect the shape, performance and other characteristics of the synthesized nano-alumina. The method promotes the further development of ultrasonic chemical preaparation of nano-materials, and injects new vitality to nanotechnologies.

Description

technical field [0001] The invention belongs to the field of chemical materials, and in particular relates to an ultrasonic synthesis method of nano-alumina and its application. Background technique [0002] At present, the preparation technology of nano-alumina at home and abroad can be divided into three categories: solid-phase method, gas-phase method and liquid-phase method. The solid-phase method is easy to operate, but it is difficult to control the particle size of the generated particles; the gas-phase method requires a large investment in equipment and complicated operation, so the liquid-phase method is more widely used. In the liquid phase method, the precipitation method mostly uses inorganic raw materials, has low cost, simple production equipment and process, and has high particle purity, small particle size and narrow particle size distribution, so it is a competitive method. [0003] In recent years, the research of ultrasonic technology in the synthesis of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02B82Y40/00C09D7/12
Inventor 程敬泉
Owner HENGSHUI UNIVERSITY