Preparation method of Al/W/PTFE energetic material

A polytetrafluoroethylene and anhydrous ethanol technology is applied in the field of preparation of aluminum/tungsten/polytetrafluoroethylene energetic materials, which can solve the problem that Al/PTFE energetic materials cannot meet application requirements, and achieve the ability to increase damage targets. , The effect of increasing the strength limit and low cost

Inactive Publication Date: 2016-02-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing Al / PTFE energetic materials cannot meet the current application requirements, and provide a preparation method of Al / W / PTFE energetic materials, which adopts a molding sintering process, and the preparation process is simple and suitable mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of aluminum / tungsten / polytetrafluoroethylene energetic material,

[0020] The Al / W / PTFE energetic material provided by this embodiment is composed of the following components by mass ratio: W40%, Al15.9%, PTFE44.1%

[0021] 1) Raw material powder preparation: Weigh out 40 g of W powder with a particle size of 3 μm, 15.9 g of Al powder with a particle size of 3 μm, and 44.1 g of PTFE powder with a particle size of 25 μm.

[0022] 2) Surface modification: Mix the aluminum powder and tungsten powder weighed above and immerse in an appropriate amount of absolute ethanol, add 0.559g of silane coupling agent therein, and soak for 6h.

[0023] 3) Powder mixing and drying step: Add the weighed PTFE powder to the above-mentioned surface-modified metal powder and immerse it in absolute ethanol, put it into a high-efficiency powder mixer and mix it thoroughly for 10 hours, then place it in an electric heating thermostat Dry, and set the temperature of the inc...

Embodiment 2

[0028] A preparation method of aluminum / tungsten / polytetrafluoroethylene energetic material,

[0029] The Al / W / PTFE energetic material provided by this embodiment is composed of the following components by mass ratio: W60%, Al10.6%, PTFE29.4%

[0030] 1) Raw material powder preparation: Weigh out 60 g of W powder with a particle size of 3 μm, 10.6 g of Al powder with a particle size of 3 μm, and 29.4 g of PTFE powder with a particle size of 25 μm.

[0031] 2) Surface modification: Mix the aluminum powder and tungsten powder weighed above and immerse in an appropriate amount of absolute ethanol, add 0.706g of silane coupling agent therein, and soak for 8 hours.

[0032] 3) Powder mixing and drying step: Add the weighed PTFE powder to the above-mentioned surface-modified metal powder and immerse it in absolute ethanol, put it into a high-efficiency powder mixer and mix it thoroughly for 8 hours, and place it in an electric heating thermostat To dry, set the temperature of the t...

Embodiment 3

[0037] A preparation method of aluminum / tungsten / polytetrafluoroethylene energetic material,

[0038] The Al / W / PTFE energetic material provided by this embodiment is composed of the following components by mass ratio: W20%, Al21.2%, PTFE58.8%

[0039] 1) Raw material powder preparation: Weigh out 20 g of W powder with a particle size of 3 μm, 21.2 g of Al powder with a particle size of 3 μm, and 58.8 g of PTFE powder with a particle size of 25 μm.

[0040] 2) Surface modification: Mix the aluminum powder and tungsten powder weighed above and immerse in an appropriate amount of absolute ethanol, add 0.412g of silane coupling agent therein, and soak for 10 hours.

[0041] 3) Powder mixing and drying step: Add the weighed PTFE powder to the above-mentioned surface-modified metal powder and immerse it in absolute ethanol, put it into a high-efficiency powder mixer and mix it thoroughly for 12 hours, then place it in an electric heating thermostat Dry, and set the temperature of t...

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Abstract

The invention relates to a preparation method of an Al/W/PTFE energetic material and belongs to the field of energetic materials. The preparation method orderly comprises raw material powder preparation, surface modification, mixed powder drying, compression molding and sintering molding. The preparation method utilizes conventional Al, W and PTFE powder as raw materials which are easily purchased and have a low cost. The preparation method has simple processes and a low cost and is suitable for batch production. Compared with the traditional Al/PTFE energetic material (Al: 26.4wt% and PTFE: 73.6wt%), the Al/W/PTFE energetic material obtained by the preparation method has higher compressive strength, density and reaction threshold. When a mass fraction of W of the energetic material is 60%, compared with the traditional Al/PTFE energetic material, the Al/W/PTFE energetic material improves density by 88%, dynamic strength limit by 21% and a reaction threshold by 24%.

Description

technical field [0001] The invention relates to a preparation method of an aluminum / tungsten / polytetrafluoroethylene (Al / W / PTFE) energetic material, belonging to the field of energetic materials. Background technique [0002] Aluminum / polytetrafluoroethylene (Al / PTFE) energetic material is a new type of "impact-induced energetic material". Different from traditional energetic materials, Al / PTFE energetic material is composed of two or more The composite material sintered by the above non-explosive solid particles is very insensitive under normal circumstances, it is difficult to be detonated, and the safety performance is extremely high. The material has the dual characteristics of polymer and metal, and has a certain degree of toughness and strength. The reactive fragments made of it can generate kinetic energy penetration on the target when it hits the target, and directly damage the target. Different from traditional steel fragments, reactive fragments can trigger strong...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08K9/06C08K3/08
Inventor 任会兰宁建国李尉刘晓俊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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