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Preparation method for nanometer thermite based on segmented flow

A nano-aluminum and thermite technology, applied in offensive equipment, explosives processing equipment, explosives, etc., can solve the problems of high production cost of self-assembly method, destruction of inorganic particle crystal form, toxicity of organic solvents, etc., and is conducive to the expansion Production, ease of research, and risk reduction effects

Inactive Publication Date: 2019-10-22
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the thermite prepared by the solid-state reaction method is easy to agglomerate; the reaction-inhibited ball milling method is easy to cause the crystal form of inorganic particles to be destroyed; the organic solvent in the sol-gel method is toxic and the synthesis cycle is long; the production cost of the self-assembly method is high
With the development of miniaturization of pyrotechnic systems, the conventional method of charging explosives is no longer applicable, and it is necessary to find a filling method of pyrotechnic agents that can meet the micro-scale

Method used

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  • Preparation method for nanometer thermite based on segmented flow
  • Preparation method for nanometer thermite based on segmented flow
  • Preparation method for nanometer thermite based on segmented flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: Al / Fe 2 o 3 Preparation of thermite

[0047] Add 0.0043g of nano-Al powder into an appropriate amount of deionized water to prepare 10mL of suspension, and then add 0.0074g of nano-Fe 2 o 3 Add an appropriate amount of deionized water to prepare 10 mL of suspension, and place the two component suspensions in syringe 8 and syringe 10, and set the injection rate to 2 mL / min by the computer; take 20 mL of n-tetradecane and place it in 20 mL syringe 9 , the injection rate is set to 4mL / min by the computer. Turn on the injection pump for the carrier liquid in the continuous phase, and turn on the drive pump for the dispersed phase after the fluid flow is stable. After the fluid passes through the T-connector, it forms droplets with uniform shape, and mixing occurs in the droplets, and the droplets flow to form thermite and then enter the sample recovery device. The resulting product is as figure 2 As shown, it can be seen from the figure that the use of Al / ...

Embodiment 2

[0048] Example 2: Al / Fe 2 o 3 Preparation of thermite

[0049] Add 0.0053g of nano-Al powder into an appropriate amount of deionized water to prepare 10mL of suspension, and then add 0.096g of nano-Fe 2 o 3 Add an appropriate amount of deionized water to prepare 10 mL of suspension, and place the two component suspensions in syringe 8 and syringe 10, and set the injection rate to 1.5 mL / min by the computer; take 20 mL of n-tetradecane and place it in 20 mL syringe 9 In the process, the injection rate was set to 3mL / min by the computer. Turn on the injection pump for the carrier liquid in the continuous phase, and turn on the drive pump for the dispersed phase after the fluid flow is stable. After the fluid passes through the T-connector, it forms droplets with uniform shape, and mixing occurs in the droplets, and the droplets flow to form thermite and then enter the sample recovery device. The resulting product is as image 3 shown. It can be seen from the figure that u...

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Abstract

The invention especially relates to a preparation method for a nanometer thermite based on segmented flow, belonging to the field of energy-containing materials. According to the method, based on a segmented flow micro-mixing platform, a dispersed phase and a continuous phase are mixed in a T-connector to produce liquid drop with uniform shapes; and the liquid drops and another dispersed phase aresubjected to mixing and a reaction in another T-connector to form a thermite drop. The dispersed phase suspension of the Al / M<x>O<y> thermite is mixed at a microscale in virtue of a syringe pump, a droplet forming T-connector, a mixing T-connector and a connection assembly, which is favorable for forming nanometer thermite agent particles which are uniformly mixed and have good sample uniformity.

Description

technical field [0001] The invention belongs to the field of energetic materials, in particular to a method for preparing nano thermite based on block flow. Background technique [0002] Nano-thermite is obtained by compounding aluminum powder and metal oxide on the nanometer scale. It has the advantages of high energy density, low sensitivity and flexible formula. Compared with traditional thermites, the reaction of nano-thermites is not constrained by the mass transfer process of oxidants and reductants. Therefore, the reaction rate of nano-thermite can be increased by more than 1000 times faster than that of traditional thermite. [0003] At present, the methods for preparing nano-thermite mainly include solid-state reaction method, reaction inhibition ball milling method, sol-gel method, self-assembly method and so on. However, the thermite prepared by the solid-state reaction method is easy to agglomerate; the reaction-inhibiting ball milling method is likely to cause...

Claims

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Application Information

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IPC IPC(8): C06B33/00C06B21/00
CPCC06B21/0066C06B33/00
Inventor 朱朋石锦宇沈瑞琪叶迎华吴立志张伟胡艳
Owner NANJING UNIV OF SCI & TECH
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