Method for preparing core-shell structure functional coating nano aluminium-nickel powder

A nano-aluminum powder and shell structure technology, applied in the coating and other directions, can solve the problems of loss of reactivity of aluminum powder particles, reduction of combustion rate and particle temperature, etc., to achieve good heat release characteristics, good thermal stability, and easy operation. Effect

Inactive Publication Date: 2008-08-13
CHINA NAT ACAD NANOTECH & ENG
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Problems solved by technology

The reason for the incomplete combustion of the nano-aluminum powder is that the aluminum powder has a thick oxide layer covering the surface of the particles, which will reduce the combustion rate and particle temperature during the combustion process, so that the combustion process will be terminated prematurely. If the particle size of the nano-aluminum powder Controlled within the range of 60-100 nanometers, it can maximize the complete combustion before the oxide layer prevents oxygen from diffusing to the core; if the aluminum powder pa

Method used

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Embodiment

[0015] Example: A preparation method of nano-aluminum-nickel powder coated with core-shell structure function, using aluminum powder of 60-100 nanometers prepared by electric explosion method as the nucleus, and nickel acetylacetonate as the coating agent, specific process method as follows:

[0016] 1) Take by weighing 0.5 gram of nickel acetylacetonate and 1.0 gram of nano aluminum powder respectively;

[0017] 2) Under normal temperature and normal pressure conditions, add 0.5 g of nickel acetylacetonate into 30 ml of ethylene glycol dimethyl ether and dissolve it completely by stirring to form a uniformly mixed liquid, and then put it into a separatory funnel;

[0018] 3) Operate in the glove box: first replace the air in the glove box with nitrogen, open the electromagnetic heating stirrer on the three-necked bottle containing 30 ml of ethylene glycol dimethyl ether liquid in the box, and add 1.0 g of ethylene glycol dimethyl ether in the stirring state Nano-aluminum pow...

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Abstract

A preparing method of core-casing structure function coating nano aluminum-nickel powder comprises: using aluminum powder with a granule size of 60-100 nanometer as core, using nickel acetylacetonate as coating agent; adding nanometer aluminium powder into glycol dimethyl ether liquid, dispersing them evenly by mixing; adding nickel acetylacetonate into glycol dimethyl ether liquid, dissolving them completely by mixing to form homogeneously mixed liquid; mixing above two liquids, making the nickel acetylacetonate to absorpt spontaneously on nanometer aluminium powder in glycol dimethyl ether liquid; naturally volatilizing and drying the nanometer aluminium powder after completing absorption and then taking it out, and core-casing structure function coating nano aluminum-nickel powder is produced. The advantages of the invention are: function coating nano aluminum-nickel powder has good heat-releasing feature and thermostability, nickel and aluminum absorb with each other effectively while activity is retained so that the aluminum powder coated by metal nickel is effective; the reaction condition is controlled easily, operation thereof is convenient and easily, and the raw material is sufficient.

Description

(1) Technical field [0001] The invention relates to a method for preparing functionally coated nano-scale metal powder, in particular to a method for preparing functionally coated nano-aluminum-nickel powder with a core-shell structure. (2) Background technology [0002] In 1899, the Germans first proposed to add aluminum powder to explosives to improve the working ability of explosives, and obtained a patent in 1900. Since then, explosives containing aluminum powder have gradually developed and have become an important series of military mixed explosives. It is widely used in the fields of air-to-air weapons and ammunition, underwater weapons and ammunition, ship-to-ship weapons and ammunition, and air-to-ground weapons and ammunition. In order to improve the energy characteristics of fuel propellants such as missiles and rockets, metal powder is usually added to the propellant, and aluminum powder is the most widely used. Aluminum powder is selected because of its high hea...

Claims

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Application Information

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IPC IPC(8): B22F1/02
Inventor 邱海林尹光
Owner CHINA NAT ACAD NANOTECH & ENG
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