Preparation method of nano aluminum powder with uniform particle size distribution
A technology of nano-aluminum powder and aluminum salt, which is applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, and can solve the problem of easy-to-coat by-product LiCl impurities, expensive preparation methods, and easy-to-oxidize products and other problems, to achieve the effect of narrow particle size distribution, less loss and less by-products
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[0039] According to a method for preparing nano aluminum powder provided by the present invention, the method includes the following steps:
[0040] Step 1. Weigh aluminum salt and solvent I into a reaction flask;
[0041] The aluminum salt is an aluminum salt soluble in water or an organic solvent, preferably a single aluminum salt or a composite salt of aluminum and alkali metal, more preferably aluminum trichloride or lithium aluminum hydride;
[0042] The solvent I is a polar organic solvent, preferably an ether solvent, such as ethyl ether, methyl ethyl ether, tetrahydrofuran, epoxy hexacyclic ring, alkoxybenzene, and more preferably anisole.
[0043] In step 1, an auxiliary organophosphorus compound is also added, such as alkyl phosphorus, aryl phosphine, alkyl aryl phosphine, preferably aryl phosphine, more preferably triphenyl phosphine.
[0044] The molar ratio of the aluminum salt to the auxiliary agent is lithium aluminum hydride: aluminum trichloride: auxiliary agent=(2-6):1...
Example Embodiment
[0074] Example 1
[0075] (1) Take a dry four-necked flask, after drawing vacuum, press anhydrous AlCl in a vacuum glove box 3 The molar ratio to triphenylphosphine (TPP) is 1:10, and 0.23gLiAlH is weighed with an electronic balance. 4 And 5.25g triphenylphosphine (TPP), then measure 40mL anisole with a graduated cylinder, pour it into the bottle, add a stir bar at the same time, and block the bottle mouth with four glass stoppers. Take another 0.27g anhydrous AlCl 3 Add it to the dropper, while measuring 10mL of anisole with a graduated cylinder and pour it into the dropper. Put the four-necked flask and the dropper into the ultrasonic machine for about 15 minutes to ensure AlCl 3 , AlLiH 4 And the three raw materials of triphenylphosphine (TPP) are completely dissolved in anisole; then put the four-necked flask on the smart magnetic stirrer for heating and stirring; pull out the four glass stoppers and insert them into the air duct and condenser tube , Thermometer and dropper,...
Example Embodiment
[0077] Example 2
[0078] The preparation steps are the same as in Example 1, except that the preparation reaction temperature is 148°C, and the obtained product nano aluminum powder is marked as No. 2.
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