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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

Active Publication Date: 2020-10-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Although boron has a very high calorific value, it is easy to be oxidized, difficult to ignite, and incomplete combustion, resulting in incomplete reaction, and it is difficult to give full play to the high calorific value of boron, which seriously hinders the application of boron in energetic material systems
At present, boron widely used in energetic material systems is generally prepared by micron boron, which has disadvantages such as low chemical purity, poor morphology, and incomplete reaction; when nano-boron is used, nano-boron is easy to agglomerate, and the specific surface is large, and the surface is easy to Oxidized, deteriorating the preparation process in energetic material systems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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Abstract

The invention belongs to the field of metal-based combustibles, and relates to a spherical high-activity boron-based pre-alloyed powder and a preparation method thereof. It mainly solves the problems such as low chemical purity, poor appearance and incomplete reaction of the existing boron powder in the energetic material system, and reduces the energy output value of the boron-containing energetic material system. The invention uses high-purity boron powder and low-melting-point active metals as raw materials, adopts the method of anaerobic, closed-loop, and program-controlled temperature pre-pressing sintering to prepare boron-based pre-alloyed powders, and uses a high-energy ball mill to spherically shape the pre-alloyed powder samples. Through chemical preparation, spherical high-activity boron-based pre-alloy powders with a particle size of submicron to tens of microns can be obtained. Adding spherical high-activity boron-based pre-alloyed powder to the energetic material system can improve the preparation process of the energetic material system, increase the energy release rate of active boron, improve the ignition performance, and increase the combustion efficiency. The development of high-energy insensitization is of great significance.

Description

technical field [0001] The invention belongs to the field of metal-based combustibles, and relates to a spherical high-activity boron-based pre-alloyed powder and a preparation method thereof. Background technique [0002] Although boron has a very high calorific value, it is easy to be oxidized, difficult to ignite, and incomplete combustion, resulting in incomplete reaction, and it is difficult to give full play to the high calorific value of boron, which seriously hinders the application of boron in energetic material systems. At present, boron widely used in energetic material systems is generally prepared by micron boron, which has disadvantages such as low chemical purity, poor morphology, and incomplete reaction; when nano-boron is used, nano-boron is easy to agglomerate, and the specific surface is large, and the surface is easy to It is oxidized and deteriorates the preparation process in energetic material systems. [0003] The key to preparing boron-based pre-all...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04B22F1/00C06B21/00
CPCC06B21/0008B22F9/04B22F1/065
Inventor 闫石张金龙焦清介吴亚琛袁庆庆
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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