Preparation method for aluminum alloy brazing flux nanometer powder with different morphologies
An aluminum alloy and nanopowder technology, applied in nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of difficult precise operation and control, large adverse environmental impact, and large health damage, and achieves low production costs, and The effect of good welding performance and regular morphology
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Embodiment 1
[0021] At room temperature, 22.60 g of potassium fluoride dihydrate was formulated into 600 mL of a potassium salt solution with a concentration of 0.4 mol / L, and 1.81 g of polyvinylpyrrolidone was added and dissolved in the above potassium salt solution (potassium fluoride dihydrate and poly The mass ratio of vinylpyrrolidone is 1:0.08), then nitric acid is added in the solution to adjust the pH of the solution=2; 14.49g and 9.66g aluminum chloride hexahydrate are weighed respectively, and the concentration of 150mL and 100mL is 0.4mol / Two kinds of aluminum salt solutions of L; then above-mentioned two kinds of aluminum salt solutions were added dropwise to the above-mentioned potassium salt solution at a speed of 25mL / min at normal temperature and pressure, and stirred with a stirrer at the same time, and continued to stir for 0.6 h; centrifuge the resulting precipitate, wash it twice with distilled water, wash it once with ethanol, and finally dry it in vacuum at 120°C to o...
Embodiment 2
[0023] At room temperature, 28.24g potassium fluoride dihydrate was formulated into 500mL potassium salt solution with a concentration of 0.6mol / L, and 1.98g antistatic agent P was added and dissolved in the above potassium salt solution (potassium fluoride dihydrate and antistatic agent The mass ratio of P is 1:0.07), then add citric acid in the solution to adjust the pH of the solution=3; take 18.11g and 11.14g aluminum chloride hexahydrate respectively, and prepare 300mL and 185mL of 0.25mol / L two A kind of aluminum salt solution; then above-mentioned two kinds of aluminum salt solutions are added dropwise to the above-mentioned potassium salt solution at a speed of 15mL / min at normal temperature and pressure respectively, while stirring with a stirrer, and continue to stir for 0.5h after the dropwise addition; The resulting precipitate was centrifuged, washed twice with distilled water, washed once with ethanol, and finally dried in vacuum at 120°C to obtain two kinds of po...
Embodiment 3
[0025] At room temperature, 37.65g potassium fluoride dihydrate was formulated into 500mL concentration of potassium salt solution of 0.8mol / L, 1.88g coconut oil alkyl oxalamide was added and dissolved in the above potassium salt solution (potassium fluoride dihydrate and The mass ratio of coconut oil alkyloxalamide is 1:0.05), then add acetic acid in the solution to adjust the pH of the solution=4; take 27.52g and 16.10g aluminum chloride hexahydrate respectively, and prepare 100mL and 115mL concentration of 1.0 mol / L of two aluminum salt solutions; then drop the above two aluminum salt solutions into the potassium salt solution at a rate of 0.25mL / min at normal temperature and pressure, and stir with a stirrer at the same time, and continue to stir after the dropwise addition 1h; Centrifuge the generated precipitate, wash it twice with distilled water, wash it once with ethanol, and finally dry it in vacuum at 250°C to obtain two kinds of powders: KAlF with a diameter of 50nm...
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