Preparation method of nanoscale core-shell structure super thermite

A technology of super thermite and core-shell structure, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of difficult to achieve precise adjustment of the thickness of the metal oxide cladding layer, cladding layer Integrity, poor uniformity and compactness, lack of precise control of the experimental process, etc., to achieve the effect of easy implementation and promotion, high degree of automation, and promotion of full contact

Inactive Publication Date: 2016-06-01
XIAN MODERN CHEM RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the MO prepared by this method x / 2 Al super thermite has the characteristics of high calorific value per unit mass and low ignition temperature, but this method is completed in the liquid phase, the process is complicated, the post-processing is troublesome, and the lack of precise control of the experimental process makes it difficult to achieve metal oxide coating The precise adjustment of layer thickness, and the integrity, uniformity and compactness of the cladding layer are poor, and the core-shell structure also has certain defects

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  • Preparation method of nanoscale core-shell structure super thermite
  • Preparation method of nanoscale core-shell structure super thermite
  • Preparation method of nanoscale core-shell structure super thermite

Examples

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Embodiment 1

[0033] This example provides a method for preparing a nanoscale core-shell structure super thermite, which specifically includes the following steps:

[0034] Step 1: Place the nano-aluminum powder particles in the reaction chamber of the vapor phase atomic layer deposition system, seal the reaction chamber, feed nitrogen gas into the vapor phase atomic layer deposition system and vacuumize it, adjust the flow rate of nitrogen gas to 100 sccm, and adjust the outlet valve of the reaction chamber to make the chamber The internal pressure is controlled at 250Pa; and the sample temperature is kept at 300°C by heating;

[0035] Step 2: Perform atomic layer deposition on the nano-aluminum powder particles to form a coating film. A cycle of atomic layer deposition growth includes the following four links:

[0036] (1) Inject the first reaction precursor tin tetrachloride (SnCl 4 ) to make a saturated surface chemical reaction with the aluminum powder and replace the surface function...

Embodiment 2

[0049] This example provides a method for preparing a nanoscale core-shell structure super thermite, which specifically includes the following steps:

[0050] Step 1: Place the nano-aluminum powder particles in the reaction chamber of the vapor phase atomic layer deposition system, seal the reaction chamber, feed nitrogen gas into the vapor phase atomic layer deposition system and vacuumize, adjust the flow rate of nitrogen gas to 120 sccm, and adjust the outlet valve of the reaction chamber to make the chamber The internal pressure is controlled at 133Pa; and the sample temperature is kept at 350°C by heating;

[0051] Step 2: Perform atomic layer deposition on the nano-aluminum powder particles to form a coating film. A cycle of atomic layer deposition growth includes the following four links:

[0052] (1) Inject the first reaction precursor ferrocene (FeCp) into the reaction chamber 2 ) to make a saturated surface chemical reaction with the aluminum powder and replace the ...

Embodiment 3

[0065] This example provides a method for preparing a nanoscale core-shell structure super thermite, which specifically includes the following steps:

[0066] Step 1: Place the nano-aluminum powder particles in the reaction chamber of the vapor-phase atomic layer deposition system, seal the reaction chamber, feed helium into the vapor-phase atomic layer deposition system and vacuumize it, adjust the helium flow rate to 120 sccm, and adjust the outlet valve of the reaction chamber Control the pressure in the chamber at 133Pa; and make the sample temperature at 150°C by heating;

[0067] Step 2: Perform atomic layer deposition on the nano-aluminum powder particles to form a coating film. A cycle of atomic layer deposition growth includes the following four links:

[0068] (1) Inject the first reaction precursor titanium tetraisopropoxide (Ti(OPr)) into the reaction chamber 4 ) to make a saturated surface chemical reaction with the aluminum powder and replace the surface functio...

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Abstract

The invention discloses a preparation method of a nanoscale core-shell structure super thermite and belongs to the technical field of nano material preparation. According to the method, two reaction former bodies alternatively pass through a reaction chamber, and chemical reaction is generated on the surfaces of nano aluminum powder particles to produce a metal oxide cladding shell. The cladding shell completely and uniformly covers on the overall outer surface of nano aluminum powder, and the thickness of the cladding shell can be accurately adjusted in a nanoscale scope according to the stoichiometric ratio of thermite reaction. The super thermite prepared by adopting the method disclosed by the invention has the characteristics of being accurate and adjustable in shell thickness in nanoscale, perfect in shell structure, high in ignition speed, high in energy release efficiency and complete in reaction. The method is high in automation degree and good in safety performance, and the nano aluminum powder particles can be directly used without aftertreatment after cladding is completed and are easy to realize and popularize in industry.

Description

technical field [0001] The invention relates to a preparation method of a nanoscale core-shell structure super thermite, which belongs to the technical field of nanomaterial preparation. Background technique [0002] SuperThermites (SuperThermites), also known as metastable intermolecular composites (Metastable intermolecularcomposite, MIC) usually refers to a class of nano-scale metal powder (such as nano-aluminum powder) and a strong oxidizing metal oxide in the nanometer Mix the resulting complexes on the scale. Such substances can trigger a violent solid-state oxidation-reduction chemical reaction (thermite reaction) under the action of strong heat or mechanical shock, releasing huge energy mainly heat energy. According to the theoretical calculation results, MIC has a very high energy density per unit volume and has more than three times the equivalent of TNT. Super thermite has become a class of energetic inorganic materials with great potential for application in mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/455C23C16/40B82Y40/00B82Y30/00
CPCC23C16/45525B82Y30/00B82Y40/00C23C16/40
Inventor 冯昊秦利军闫宁龚婷惠龙飞李建国
Owner XIAN MODERN CHEM RES INST
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