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Method for controllably preparing aluminum oxide powder with multiple morphologies

A technology of alumina powder and aluminum powder, which is applied in chemical instruments and methods, preparation of alumina/hydroxide, inorganic chemistry, etc., can solve problems such as pollution, long process time, and complicated operation, so as to promote development and solve The effect of heavy pollution

Inactive Publication Date: 2016-07-06
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention proposes a controllable method for preparing alumina powders with various shapes, which solves the problems of serious pollution, low purity, long process time and complicated operation in the prior art

Method used

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  • Method for controllably preparing aluminum oxide powder with multiple morphologies
  • Method for controllably preparing aluminum oxide powder with multiple morphologies
  • Method for controllably preparing aluminum oxide powder with multiple morphologies

Examples

Experimental program
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Effect test

example 1

[0018] A controllable Al with various morphologies 2 o 3 The method of powder, its step is:

[0019] Select aluminum powder with a particle size of 53 microns and high-purity graphite with a particle size of 30 microns as raw materials, weigh the aluminum powder and graphite powder according to the Al / C mass ratio of 2:1, and then mix and ball mill them in a ball mill for 5 hours to make them fully well mixed. The prepared raw materials were placed in a microwave tube furnace for reaction synthesis. Both ends of the quartz tube were open, the heating rate was 100°C / min, the synthesis temperature was 1100°C, and the temperature was kept for 1 hour. The obtained product was alumina whiskers after cooling.

example 2

[0021] A controllable Al with various morphologies 2 o 3 The method of powder, its step is:

[0022] Select aluminum powder with a particle size of 10 microns and activated carbon with an average particle size of 10 microns as raw materials, weigh the aluminum powder and activated carbon source powder according to the Al / C mass ratio of 3:1, and then mix and ball mill them in a ball mill for 5 hours to make It is well mixed and homogeneous. The prepared raw materials were placed in a microwave tube furnace for reaction synthesis. Both ends of the quartz tube were open, the heating rate was 100°C / min, the synthesis temperature was 1000°C, and the heat preservation was carried out for 1 hour. The obtained product was alumina nanosheets after cooling.

example 3

[0024] A controllable Al with various morphologies 2 o 3 The method of powder, its step is:

[0025] Select aluminum powder with a particle size of 30 microns and carbon black with an average particle size of 30nm as raw materials, weigh the aluminum powder and carbon black powder according to the Al / C mass ratio of 7:3, and then mix and ball mill them in a ball mill for 5 hours to make them fully well mixed. Put the prepared raw materials in a microwave tube furnace for reaction synthesis. The two ends of the quartz tube are open. The heating rate is 100°C / min. The synthesis temperature is 1000°C, and the temperature is kept for 2 hours. The obtained product is fine-grained alumina after cooling. particles.

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Abstract

The invention provides a method for controllably preparing aluminum oxide powder with multiple morphologies.The method includes the steps that aluminum powder and a carbon source are used as raw materials, and an aluminum oxide powder material is prepared through a microwave method.The aluminum powder and the carbon source are fully mixed uniformly through a ball milling technology, then the mixed powder is put into a crucible, the crucible is put into a microwave tube furnace to conduct reactive synthesis, the two ends of the tube furnace are opened, and the obtained product is the aluminum oxide powder after being cooled.A simple path is provided for preparation and morphology adjustment and control of the aluminum oxide powder by adopting the microwave technology, the problems of serious pollution, low purity, long technological time, complex operation and the like in the prior art are solved, the application range of the technology is expanded into preparation of other oxide materials, and development of a novel material is further promoted.

Description

technical field [0001] The invention relates to the field of high-temperature functional / structural ceramics, in particular to a method for controllably preparing alumina powders with various shapes. Background technique [0002] High-purity nano-alumina powder has excellent optical, electrical and mechanical properties, so it is widely used in the field of new materials, such as transparent ceramic raw materials. Fluorescent materials, sapphire crystal materials, catalysts and semiconductor substrates, etc. At present, the methods for preparing high-purity alumina powder mainly include: aluminum ammonium sulfate pyrolysis method, aluminum carbonate pyrolysis method, organoaluminum hydrolysis method, spark discharge method, mercuric oxide spark hydrolysis method and activated aluminum powder hydrolysis method, etc. For example, the patent CN95105843.6 uses the salting-out method to produce alumina micropowder, which has the disadvantages of low purity and serious pollution;...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/42
CPCC01F7/422C01P2004/03C01P2004/16C01P2004/20
Inventor 梁宝岩张旺玺张艳丽
Owner ZHONGYUAN ENGINEERING COLLEGE
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