Method for preparing nano aluminum oxide powder

A nano-alumina and powder technology, applied in alumina/hydroxide preparation, nanotechnology, nanotechnology and other directions, can solve the problems of easy agglomeration of powder, low drying efficiency, slow feeding speed, etc. The effect of explosive nucleation, fast feeding and low cost
CN101186325AInactive Publication Date: 2008-05-28GUIZHOU BRANCH CHINA ALUMINUM IND
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUIZHOU BRANCH CHINA ALUMINUM IND
Publication Date
2008-05-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method of nano-alumina powder, and is characterized in that a preparation process embodies that aluminum salt solution atomized by spraying is first sprayed into ammonium bicarbonate solution in a stirred state, then reacting with surfactant added; the mixture obtained is next treated with microwave drying after precipitation, aging, filtration and washing, calcined to obtain the nano-alumina powder. In addition, the dried AACH prepared by the preparation method of the invention can be calcined to obtain nano Gamma-Al2O3 with less conglobation and uniform particle size.
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Description

technical field

[0001] The invention relates to a method for preparing nano-alumina powder. Background technique

[0002] Nano-Al as one of special functional materials 2 o 3 Powder, due to its excellent characteristics of high strength, high hardness, wear resistance, corrosion resistance, high temperature resistance, oxidation resistance, good insulation, large surface area, etc., has been used in chemical catalysts, rare earth three primary color phosphors, integrated circuit chips, single Crystal materials, physical and chemical instruments, artificial bones, laser materials, aviation light source devices and many other high-tech cutting-edge industries have been widely used. Nevertheless, nano-Al 2 o 3 Powder preparation technology still appears to be progressing slowly compared to its application. Especially in its preparation technology, there are many technical and engineering problems. Some of the achievements that have been made are still in the small-scale t...

Claims

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