Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of aluminum oxide/aluminum composite fine powder

A technology of alumina and fine powder, which is applied in the field of composite materials, can solve problems such as complex process flow, a large amount of waste gas, and expensive raw materials, and achieve the effects of simple process, improved dispersion, and no waste gas

Active Publication Date: 2018-08-31
KUNMING UNIV OF SCI & TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The use of fine-grained or ultra-fine-grained alumina reinforcements can significantly improve the overall performance of composite materials. There are many methods for preparing ultra-fine alumina powders, such as ammonium aluminum carbonate decomposition method, ammonium aluminum sulfate decomposition method, and mercuric chloride activation. Hydrolysis method, organoaluminum hydrolysis method, active aluminum powder hydrolysis method, plasma method, electrochemical method, etc. generally have the characteristics of expensive raw materials and complicated process flow, and the production process is often accompanied by a large amount of waste gas and waste liquid. The ultra-fine alumina powder produced by the existing technology requires high cost as a reinforcement of composite materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of aluminum oxide/aluminum composite fine powder
  • A kind of preparation method of aluminum oxide/aluminum composite fine powder
  • A kind of preparation method of aluminum oxide/aluminum composite fine powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of alumina / aluminum composite fine powder described in this embodiment, the specific steps are as follows:

[0032] (1) Mixing industrial-grade alumina powder and industrial-grade aluminum powder at a mass ratio of 1:1 to obtain a mixture of alumina powder and aluminum powder;

[0033] (2) Place the mixture of step (1) in the reaction vessel of the vacuum furnace-high-purity alumina crucible 5, and the high-purity alumina crucible 5 is connected to the condensation device-high-purity alumina condensing plate 6, and the vacuum exhaust port 7 will The vacuum furnace is evacuated to a pressure of 1 Pa, and the current is passed through the water-cooled electrode 1 to the graphite electrode base 2, so that the graphite electrode heating element 3 connected to the graphite electrode base 2 generates heat, and the high-purity alumina crucible 5 in the heating work area is heated up to 1200°C, heat insulation layer 4 reduces heat loss, keeps warm for 60 ...

Embodiment 2

[0038] The preparation method of alumina / aluminum composite fine powder described in this embodiment, the specific steps are as follows:

[0039] (1) Take industrial-grade alumina powder and waste with an aluminum content of 98% according to a mass ratio of 1:2, crush and grind the aluminum-containing waste and mix it with industrial-grade alumina powder to obtain a mixture;

[0040] (2) Place the mixture of step (1) in the reaction vessel of the vacuum furnace-high-purity alumina crucible 5, and the high-purity alumina crucible 5 is connected to the condensation device-high-purity alumina condensing plate 6, and the vacuum exhaust port 7 will The vacuum furnace is evacuated to a pressure of 2 Pa, and the current is passed through the water-cooled electrode 1 to the graphite electrode base 2, so that the graphite electrode heating element 3 connected to the graphite electrode base 2 generates heat, and the high-purity alumina crucible 5 in the heating work area is heated up to ...

Embodiment 3

[0046] The preparation method of alumina / aluminum composite fine powder described in this embodiment, the specific steps are as follows:

[0047] (1) According to the ratio of the total mass of waste with 90% alumina content and industrial-grade alumina powder to the mass of industrial-grade aluminum powder at 3:2, the alumina-containing waste is crushed and ground and combined with industrial-grade aluminum powder Aluminum powder and industrial grade alumina powder are mixed together to obtain a mixture;

[0048] (2) Place the mixture of step (1) in the reaction vessel of the vacuum furnace-high-purity alumina crucible 5, and the high-purity alumina crucible 5 is connected to the condensation device-high-purity alumina condensing plate 6, and the vacuum exhaust port 7 will The vacuum furnace is evacuated to a pressure of 3 Pa, and the current is passed through the water-cooled electrode 1 to the graphite electrode base 2, so that the graphite electrode heating element 3 connect...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of aluminum oxide / aluminum compounded micro-fine powder. According to the method, aluminum oxide and aluminum of which the purity is not high are used as a raw material to react in vacuum at a high temperature to generate aluminum oxide gas; meanwhile, aluminum is evaporated to form aluminum steam; under a continuous vacuumizing condition, the aluminum oxide gas and the aluminum steam enter a low-temperature condensation region; the aluminum oxide gas is transformed into aluminum oxide and aluminum by means of disproportionation; the aluminum oxide and the aluminum, together with the simultaneously cooled aluminum, form the aluminum oxide / aluminum compounded micro-fine powder. The aluminum oxide / aluminum compounded micro-fine powder prepared by the preparation method disclosed by the invention is free of other impurities, and the preparation method is simple, environment-friendly and free from emission of waste gas and waste liquid.

Description

technical field [0001] The invention relates to a method for preparing alumina / aluminum composite fine powder, which belongs to the field of composite materials. Background technique [0002] Alumina / aluminum composite materials have a series of excellent properties such as high specific strength, high specific stiffness, high wear resistance and low thermal expansion coefficient, and are widely used in various aspects of production and life. Particle size and distribution have an important effect on the performance of composite materials. [0003] The use of fine-grained or ultra-fine-grained alumina reinforcements can significantly improve the overall performance of composite materials. There are many methods for preparing ultra-fine alumina powders, such as ammonium aluminum carbonate decomposition method, ammonium aluminum sulfate decomposition method, and mercuric chloride activation. Hydrolysis method, organoaluminum hydrolysis method, active aluminum powder hydrolysi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/30B22F9/16
CPCB22F9/16B22F9/30
Inventor 冯月斌张笑杨保民陈阵
Owner KUNMING UNIV OF SCI & TECH