Copper-coated molybdenum composite powder with uniform and controllable thickness, preparation method and application of copper-coated molybdenum composite powder
A copper-coated molybdenum and composite powder technology, which is applied in electrolytic coatings, coatings, etc., can solve the problems of difficult large-scale production, high preparation costs, and high energy consumption
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Embodiment 1
[0092] Example 1: Intermittent electroplating of copper-coated molybdenum composite powder with pyrophosphate bath
[0093] (1) Pretreatment of molybdenum powder before plating: molybdenum powder with a particle size of 0.1-10 μm and an irregular shape (its appearance is as follows figure 1 and figure 2 shown) in an alkaline solution (degreasing solution) at 50°C for the first ultrasonication for 30 minutes, where the alkaline solution includes: sodium hydroxide 50g / L, sodium carbonate 10g / L, trisodium phosphate 20g / L, Sodium dodecylsulfonate 1g / L, then remove the upper layer solution, and wash it with deionized water to neutrality, then place it in an acidic solution at 20°C for a second ultrasonic wave for 10min, where the acidic solution includes concentrated nitric acid 100g / L, then remove the upper layer solution and clean the molybdenum powder to neutrality, and dry it in a vacuum oven for later use. (2) Join the pretreated molybdenum powder in the step (1) in the py...
Embodiment 2
[0094] Example 2: Intermittent electroplating of copper-coated molybdenum composite powder with pyrophosphate bath
[0095] (1) Pretreatment before molybdenum powder plating: the particle size of molybdenum powder is 5-20μm, the temperature of alkaline solution is 60°C, the first ultrasonic wave is 30min, and the sodium hydroxide in alkaline solution is 100g / L, and trisodium phosphate is 30g / L L, sodium dodecyl sulfonate 2g / L, acidic solution temperature is 50 ℃, except the second ultrasonic 20min, all the other are identical with embodiment 1. (2) In addition to pyrophosphate copper plating solution includes: copper pyrophosphate 50g / L, potassium pyrophosphate 280g / L, ammonium citrate 15g / L, potassium sodium tartrate 20g / L, ammonia water 3ml / L, with potassium hydroxide Adjust the pH value to 8.4 to 8.6, the temperature is 55°C, stir at a speed of 450r / min, stir for 1min, and the cathode current density is 1.0A / dm 2, Copper plating 3min, cycle stirring, electroplating process...
Embodiment 3
[0096] Example 3: Intermittent electroplating of copper-coated molybdenum composite powder with pyrophosphate bath
[0097] (1) Pretreatment before molybdenum powder plating: remove molybdenum powder into a complete spherical shape, first ultrasonic for 40 minutes, sodium hydroxide 100g / L, trisodium phosphate 30g / L, sodium dodecylsulfonate 3g / L in alkaline solution L, acidic solution is except the concentrated sulfuric acid 100g / L, all the other steps are identical with embodiment 2 step (1). (2) Copper pyrophosphate 50g / L, potassium pyrophosphate 280g / L, ammonium citrate 10g / L, potassium sodium tartrate 20g / L, ammonia water 3ml / L, cathode current density 1.5A in the pyrophosphate copper plating solution / dm 2 , copper plating for 5 minutes, 12 cycles of cyclic stirring and electroplating process, and the rest of the steps are the same as in Example 2. (3) and (4) are the same as in Example 2. The appearance of the composite powder obtained in this example is copper red, an...
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