Method for preparing micro spherical tungsten powder
A spherical and tungsten powder technology, applied in the field of powder metallurgy powder production, can solve the problem of high cost of spherical tungsten powder, and achieve the effect of simplifying production technology and reducing production cost
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Embodiment 1
[0016] Under the condition of ultrasonic stirring, add 1ml of dispersant BYK-154 into 100ml of saturated ammonium tungstate solution and mix well. Then continue to add 15 ml of concentrated sulfuric acid under the stirring effect of ultrasonic wave, finally generate precipitation after the reaction. After the precipitate is filtered out, it is dried in a drying oven, and then ground and crushed into powder. Then place it in a hydrogen reduction furnace for reduction at 680°C to obtain spherical tungsten powder with an average particle size of 1.2 microns.
Embodiment 2
[0018] Under the condition of ultrasonic stirring, add 2ml of dispersant BYK-163 into 100ml of saturated ammonium tungstate solution and mix well. Then continue to add concentrated sulfuric acid 18ml under the stirring effect of ultrasonic wave, finally generated precipitation after the reaction. After the precipitate is filtered out, it is dried in a drying oven, and then ground and crushed into powder. Then place it in a hydrogen reduction furnace for reduction at 720°C to obtain spherical tungsten powder with an average particle size of 2.5 microns.
Embodiment 3
[0020] Under the condition of ultrasonic stirring, add 1.0g of dispersant sodium lauryl sulfate into 100ml of saturated ammonium tungstate solution and mix well. Then continue to add 17 ml of concentrated sulfuric acid under the stirring effect of ultrasonic waves, and finally generate a precipitate after the reaction. After the precipitate is filtered out, it is dried in a drying oven, and then ground and crushed into powder. Then place it in a hydrogen reduction furnace for reduction at 700°C to obtain spherical tungsten powder with an average particle size of 2.0 microns.
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