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Preparation method of porous aluminium

A technology for porous aluminum and aluminum alloys, which is applied in the field of preparing porous aluminum by vacuum volatilization of elements, can solve the problems of pollution by-products, uncontrollable porous aluminum porosity, low porous aluminum porosity, etc., and achieves easy mass production. , the effect of reducing purity and improving utilization

Active Publication Date: 2018-11-23
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method not only has a complicated preparation process, but also produces pollution and a large number of by-products. The prepared porous aluminum has low porosity and low yield, and the porosity of porous aluminum is uncontrollable. The preparation method of porous aluminum with high and controllable porosity is particularly important

Method used

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  • Preparation method of porous aluminium
  • Preparation method of porous aluminium
  • Preparation method of porous aluminium

Examples

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Embodiment 1

[0037] A method for preparing porous aluminum, comprising the following steps: take 1g of aluminum powder and 2g of zinc powder, and heat them under an argon atmosphere at 700°C for 5 hours to obtain an aluminum-zinc alloy; The zinc element in the aluminum-zinc alloy is removed for 2 hours in the first step, and the second step is removed at 600°C for 0.5 hours to obtain three-dimensional porous aluminum.

Embodiment 2

[0039] A method for preparing porous aluminum, comprising the steps of: taking 1g of aluminum powder and 2g of lithium powder, heating them under an argon atmosphere at 660°C for 10 hours to obtain an aluminum-lithium alloy; The lithium element in the aluminum-lithium alloy is removed in the first step for 5 hours, and then the second step is removed at 500°C for 2 hours to obtain three-dimensional porous aluminum.

Embodiment 3

[0041] A method for preparing porous aluminum, comprising the following steps: take 1g of aluminum powder and 2g of potassium powder, and heat them under a nitrogen atmosphere at 760°C for 1 hour to obtain an aluminum-potassium alloy; Potassium in the aluminum-potassium alloy is removed in the first step for 0.5h, and then removed in the second step at 700°C for 0.1h to obtain three-dimensional porous aluminum.

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Abstract

The invention relates to a preparation method of porous aluminium, and belongs to the technical field of porous aluminium preparation. The method comprises the following steps that 1, aluminium and alow-vapour pressure metal raw material are placed in a vacuum furnace, vacuumizing is not needed, and heating and smelting are conducted in an inert atmosphere directly to obtain aluminium alloy; 2, vacuumizing is conducted on the vacuum furnace in the step 1, firstly, a first step is conducted at a low temperature to remove a low-vapour pressure metal component in the aluminium alloy, and then heating and a second step is conducted to remove the low-vapour pressure metal component in the aluminium alloy to obtain the porous aluminium. According to the preparation method of the porous aluminium, by means of the fusion characteristic and the volatilization characteristic of aluminium, smelting of the aluminium alloy and preparation of the porous aluminium are conducted integratedly, in thewhole preparation process, contact with oxidizing gas is avoided, the preparation method can effectively prevent the aluminium alloy in the middle link and the final porous aluminium are oxidized at ahigh temperature to reduce the purity of the porous aluminium, and the prepared porous aluminium is even in pore diameter distribution, controllable in size and high in porosity.

Description

technical field [0001] The invention relates to the technical field of preparing porous aluminum, in particular to a method for preparing porous aluminum by vacuum volatilization of elements. Background technique [0002] Porous aluminum is a kind of metal matrix composite functional material with integrated structure and function composed of aluminum or aluminum alloy matrix phase and pore phase. Porous aluminum has low density, good electromagnetic wave absorption, large specific surface area, high heat exchange and heat dissipation capacity, Good energy absorption, good sound absorption and sound insulation, excellent circulation and filtration separation capabilities, heat and fire resistance, no pollution, low moisture absorption, recyclable reuse and other excellent characteristics. Porous aluminum not only overcomes the shortcomings of foamed plastics that are not resistant to high temperatures and porous ceramics are brittle, but also retains the advantages of metals...

Claims

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Application Information

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IPC IPC(8): C22C1/08C22C21/00C22C3/00
CPCC22C1/08C22C3/00C22C21/00
Inventor 冯金奎安永灵
Owner SHANDONG UNIV
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