A spherical high-activity boron-based pre-alloyed powder and its preparation method
A pre-alloyed powder, high-activity technology, applied in the field of spherical high-activity boron-based pre-alloyed powder and its preparation, can solve the problems of incomplete reaction, deteriorated preparation process, difficult ignition, etc., so as to improve combustion efficiency and improve reaction Efficiency, effect of improving ignition performance
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specific Embodiment approach 2
[0033] a) Place the micron boron powder in a container filled with ethyl acetate (B:C 4 h 8 o 2 =1g:6mL) vessel soaked for 12 hours, suction filtered, vacuum-dried, and set aside.
[0034] b) The magnesium powder and the boron powder are mixed, ground and tabletted in a vacuum glove box according to the molar ratio of 1:4.
[0035] c) Seal the tablet with platinum foil and place it in a tubular heating furnace, vacuumize the tubular heating furnace to keep the pressure below -0.5Kpa, and keep the pressure for 1 hour; fill the tubular heating furnace with high-purity argon Gas, the pressure is controlled at 1.5Kpa, and the pressure is maintained for 1 hour. Repeat the operation 5 to 7 times.
[0036] d) Heating the tubular heating furnace to 600° C. at a rate of 15° C. / min, then holding the temperature for 2 hours, and then cooling to room temperature. After grinding and pressing, the sintering is repeated two to three times.
[0037] e) Finally, the sample is spheroidize...
specific Embodiment approach 3
[0039] a) Place nano-boron powder in acetone (B:CH 3 COCH 3 =1g:8mL) vessel soaked for 18 hours, suction filtered, vacuum-dried, and set aside.
[0040] b) The aluminum powder and the boron powder are mixed, ground and tabletted in a vacuum glove box according to a molar ratio of 1:6.
[0041] c) Seal the tablet with platinum foil and place it in a tubular heating furnace, vacuumize the tubular heating furnace to keep the pressure below -0.5Kpa, and keep the pressure for 2 hours; fill the tubular heating furnace with high-purity argon Gas, the pressure is controlled at 2Kpa, and the pressure is maintained for 2 hours. Repeat the operation 5 to 7 times.
[0042] d) Heating the tubular heating furnace to 450° C. at a rate of 20° C. / min, then holding the temperature for 1.5 hours, and then cooling to room temperature. After grinding and pressing, the sintering is repeated two to three times.
[0043] e) Finally, the sample is spheroidized with a high-energy ball mill (ball-t...
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