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Method for improving free-running property and reactivity of energetic active material

A technology of active materials and fluidity, applied in the field of improving the fluidity and reactivity of energetic active materials, can solve the problem of hindering the full contact between active metals and polytetrafluoroethylene components, affecting the energy density and reaction degree of energetic active materials, Insufficient mechanical strength of fragments and other problems, to achieve the effect of facilitating large-scale batch production, low cost and low price

Active Publication Date: 2021-11-16
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of a large amount of inert metals hinders the sufficient contact between active metals and PTFE components, affecting the energy density and reaction degree of energetic active materials
At the same time, the metal / fluoropolymer energetic active material matrix generally chooses to suspend polytetrafluoroethylene fine particle resin. Although the strength and other properties of metal particle filling have been improved to a certain extent, due to poor compatibility with the matrix and affinity The resultant force is small, and there is an obvious interface in the matrix, and it is not easy to disperse evenly, so the mechanical strength of the fragments is not enough, which also affects the degree of reaction
In addition, the energetic active materials obtained by simple mixing, in addition to uneven dispersion, have poor fluidity and are difficult to be used in mass production, which is also a problem that must be considered in the application of metal / fluoropolymer energetic active materials

Method used

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  • Method for improving free-running property and reactivity of energetic active material
  • Method for improving free-running property and reactivity of energetic active material
  • Method for improving free-running property and reactivity of energetic active material

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A method for improving the fluidity and reactivity of energetic active materials, the specific steps are as follows:

[0033] Preliminary mixing: Weigh 10 parts of aluminum powder, 55 parts of tungsten powder, 5 parts of polytetrafluoroethylene superfine powder, 5 parts of nano-alumina and 0.5 parts of graphite and place them in a double planetary power mixer for preliminary mixing and drying. 6h, the stirring speed is 50rpm, the dispersion speed is 1000rpm, and the drying temperature is 60℃; among them, the particle size of aluminum powder is 10μm, the particle size of tungsten powder is 10μm, the particle size of polytetrafluoroethylene ultrafine powder is 2μm, the particle size of nano-alumina is 20nm, and the particle size of graphite is 1μm;

[0034] Secondary mixing: Place the above-mentioned uniformly mixed powder and 25 parts of suspended polytetrafluoroethylene powder in a double planetary power mixer for secondary mixing and drying. The mixing time is 6 hours,...

Embodiment 2

[0039] A method for improving the fluidity and reactivity of energetic active materials, the specific steps are as follows:

[0040] Preliminary mixing: Weigh 10 parts of aluminum powder, 5 parts of magnesium powder, 50 parts of tungsten powder, 10 parts of polytetrafluoroethylene superfine powder, 5 parts of nano-alumina and 0.5 part of graphite in a double planetary power mixer for preliminary mixing, and For drying, the mixing time is 6h, the stirring speed is 50rpm, the dispersion speed is 1000rpm, and the drying temperature is 60°C; among them, the particle size of aluminum powder is 10μm, the particle size of magnesium powder is 10μm, the particle size of tungsten powder is 10μm, and the particle size of polytetrafluoroethylene ultrafine powder is 2μm , nano-alumina particle size 20nm, graphite particle size 1μm;

[0041] Secondary mixing: Place the above-mentioned homogeneously mixed powder and 20 parts of suspended polytetrafluoroethylene powder in a double planetary p...

Embodiment 3

[0046] A method for improving the fluidity and reactivity of energetic active materials, the specific steps are as follows:

[0047] Preliminary mixing: Weigh 10 parts of aluminum powder, 50 parts of tungsten powder, 10 parts of PTFE superfine powder, 10 parts of nano-alumina and 0.1 part of graphite and place them in a double planetary power mixer for preliminary mixing and drying. 6h, the stirring speed is 50rpm, the dispersion speed is 500rpm, and the drying temperature is 60℃; among them, the particle size of aluminum powder is 10μm, the particle size of tungsten powder is 1μm, the particle size of polytetrafluoroethylene ultrafine powder is 2μm, the particle size of nano-alumina is 10nm, and the particle size of graphite is 1μm;

[0048] Secondary mixing: Place the above-mentioned uniformly mixed powder and 20 parts of suspended polytetrafluoroethylene powder in a double planetary power mixer for secondary mixing and drying. The mixing time is 6 hours, the speed of the st...

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Abstract

The invention discloses a method for improving free-running property and reactivity of an energetic active material, the method comprises the following steps that 1, a double-planet power stirrer is adopted, and a low-speed stirring paddle of the double-planet power stirrer and a sawtooth-shaped dispersion disc mounted on a high-speed dispersion shaft rotate and revolve; 2, in combination with the low-gap design of the stirring paddle, the low-speed stirring paddle enables the material to generate strong kneading interference motion and up-down / left-right circulating motion; and 3, the material is strongly sheared and scattered through the high-speed dispersion disc, and therefore it is finally guaranteed that the material is fully dispersed and evenly mixed; and according to the method, the fragment penetration and explosion power and the mass production capacity are further improved.

Description

technical field [0001] The invention relates to the field of active fragment materials, in particular to a method for improving the fluidity and reactivity of energetic active materials. Background technique [0002] Metal / fluoropolymer energetic active materials, also known as "shock-induced reaction materials", are formed by pressing and sintering two or more non-explosive solids. They are very insensitive and safe under static conditions, and have certain toughness and strength. , can be directly machined, and under the action of high-speed impact, violent explosion and combustion will occur, resulting in high heat and high temperature; the active fragments prepared by it can use high kinetic energy and high chemical energy released after impact explosion, which can be used for cruise Air targets such as missiles, ballistic missiles, and fighter jets carry out comprehensive damage such as penetration, implosion, arson, and overpressure, which greatly enhances the damage e...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/02B22F3/10
CPCB22F3/02B22F3/1017
Inventor 束庆海赵帅吕席卷成丽荣石艳松王东旭邹浩明徐博林文萍蒋月仙
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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