221results about "Explosives" patented technology

A fuel grain assembly for a hybrid rocket engine includes a hybrid fuel grain including fuel grain material, wherein an outermost portion of the fuel grain material defines an outer surface of the fuel grain, and wherein the fuel grain material includes a polymer based rocket fuel material; and a solid propellant material disposed in contact with the fuel grain material of the hybrid fuel grain, wherein the solid propellant material includes an oxidizer and a binder material, wherein a hollow combustion port extends through the fuel grain assembly, wherein at least a portion of a wall of the hollow combustion port is defined by the solid propellant material.

The invention provides a molecular perovskite energetic material spherocrystal and a preparation method thereof, and belongs to the technical field of energetic material preparation. On one hand, the particle size of a molecular perovskite energetic material is reduced through refinement, so that the sensitivity of the molecular perovskite energetic material is reduced, and the performance of the molecular perovskite energetic material is improved; on the other hand, the spheroidized growth of the crystal is controlled through the polymer, the friction sensitivity of the molecular perovskite energetic material is further reduced, the problem of high mechanical sensitivity of the molecular perovskite energetic material is effectively solved, and effective support is provided for expanding the practical application field of the molecular perovskite energetic material.

The invention provides a preparation method of a thermite, which comprises the following steps: taking CuN (CN) 2 and aluminum powder as raw materials, adding an organic solvent, mixing, and carrying out vacuum drying to obtain the thermite, the mass ratio of the CuN (CN) 2 to the aluminum powder is (1: 1)-(1: 4). According to the method for preparing the thermite through CuN (CN) 2, a new thought for applying other oxides to an energetic material of the thermite is provided, the thermite can provide the heat of 1528.9 J / g and the gas production pressure of 50 KPa, and it is detected that a high-temperature-resistant material aluminum nitride is generated in a product obtained after combustion.

A layered thermite composite includes alternating layers of metal oxide and reducing metal deposited upon a substrate. A fuzzy interface layer between each metal oxide layer and reducing metal layer includes reducing metal, reducing metal oxide, and metal oxide at least partially intermixed therein. The fuzzy interface layer forms while moving between chambers in a multi-chamber deposition process which minimizes exposure of the reducing metal to oxygen while moving between chambers. The fuzzy interface layer is not expected to grow in thickness after deposition. The combination of the relative thinness of the fuzzy interface layer as well as the presence of reactants as well as reducing metal oxide maintains the sensitivity of the layered thermite structure to mechanical ignition if the structure is used within a primer.

The invention discloses an automatic batching safety inspection method and equipment for an emulsion explosive water-phase preparation tank. The method relates to the technical field of safety inspection data management, and comprises the following steps: collecting and processing automatic batching data of an emulsion explosive water phase preparation tank; and analyzing, optimizing and adjusting the data. According to the method, the automatic batching data of the emulsion explosive water-phase preparation tank are collected and processed, the automatic batching data of the emulsion explosive water-phase preparation tank are analyzed, the mixing uniformity and energy consumption efficiency evaluation value and the PI D control response timeliness evaluation value are obtained, comprehensive analysis and optimization adjustment are carried out, the stability of the safety inspection method is improved, and the safety inspection efficiency is improved. The problem that in the prior art, a safety inspection method is low in stability is solved.

The application discloses an energetic material, a preparation method thereof and application of the energetic material as explosives and self-ignition propellants. I C 12 H 12 N 10 or M Ⅱ C8H6N8; wherein, M I is selected from Co, Ni and Cu; M Ⅱ is selected from Zn. The energetic material is convenient to synthesize, has good thermal stability, excellent mechanical sensitivity, excellent propelling performance and specific impulse, has a significant energy density advantage, can effectively solve the problem of continuous evaporation of hydrazine propellants during storage, avoid the risk of internal pressure increase of a fuel tank, and overcome the problems of liquid fuel in the storage and transportation process. Therefore, the innovative high-performance energetic material has excellent performance and wide application potential, and has great commercial value in the fields of aviation, aerospace and military.

The first aspect of the present application provides a nitrogen-rich condensed energetic compound, which has high nitrogen content, high energy density and various performance indexes superior to lead styphnate and DDNP; the second aspect of the present application provides a preparation method of the nitrogen-rich condensed energetic compound, which takes 3,5,6-trichloro-1,2,4-triazine as raw material, and obtains the energetic compound through two-step reactions of ammoniation and azidation, and has the advantages of simple operation, high reliability, high yield, good stability, suitability for large-scale production, easy availability of raw materials and low production cost.

This invention discloses a gas-assisted coaxial electrostatic spraying device and a method for preparing aluminum-based energetic composite materials. The device includes a gas-liquid flow transport unit, an electrostatic generator, and a receiving plate. The gas-liquid flow transport unit includes an outer tube and an inner tube coaxially fitted together, forming an airflow cavity between the outer and inner tubes. The inner tube includes a liquid-passing pipe and a nozzle coaxially connected together, with a liquid spraying port at the front end of the nozzle. The airflow cavity is closed at the rear end and has an air outlet at the front end corresponding to the liquid spraying port. An air inlet is provided on the side wall of the outer tube, which is connected to a gas transport device via a pipe. The gas transport device is used to deliver gas into the airflow cavity. The electrostatic generator acts on the nozzle to enable the droplets sprayed by the nozzle to carry a charge, and the droplets can form powder at the receiving plate. This invention achieves the preparation of energetic composite materials based on large-size aluminum matrix through gas-phase assistance, improving the preparation efficiency of energetic composite materials; and improves the ability to control the particle size of the product by controlling the airflow field.

The present invention relates to an energetic perfluoroborate binder, a preparation method thereof and an application thereof, belonging to the technical field of energetic binders. The structural formula of the binder is:; wherein, n is a positive integer less than or equal to 20. The main raw materials of the binder are 1H,1H,2H,3H,3H-perfluorononane-1,2-diol, boric acid and polyazidoglycidyl ether; boric acid forms a borate bond with 1H,1H,2H,3H,3H-perfluorononane-1,2-diol, and polyazidoglycidyl ether is compounded through the boron-nitrogen coordination action with 1H,1H,2H,3H,3H-perfluorononane-1,2-diol, realizing the controllable preparation of the energetic perfluoroborate binder. The energetic perfluoroborate binder has high energy and stable storage, and can improve the energy and mechanical properties of the propellant.

This invention relates to the field of solid propellant technology, specifically disclosing a neutral polymer bonding agent, its preparation method, and its application in solid propellants. The neutral polymer bonding agent is prepared by polymerization of poly(hydroxyalkyl polyacrylate) and cyanoacetic acid as raw materials. It can achieve controllable molecular weight and controllable proportion of functional groups in the polymer. Moreover, the active group -CN in the neutral polymer bonding agent has low steric hindrance and is more easily adsorbed on the surface of ammonium nitrate particles, thereby improving the bonding effect.

To provide a gas generating agent composition that ignites at a relatively low-temperature phase in which a gas generator does not rupture.SOLUTION: A gas generating agent composition comprises a fuel component and an oxidizing agent component. The gas generating agent composition further comprises, as the fuel component, a compound having a lactone structure and having a melting point or a decomposition point of 90°C or higher but lower than 250°C.SELECTED DRAWING: None

Polymeric materials which inter alia may be used as binder materials for energetic materials and to improved energetic materials containing such a binder and a process for the manufacture of these novel polymeric materials wherein the polymeric material comprising a hydroxyl group containing compound reacted with a cross-linking agent having at least two reactive groups per molecule at least one of which is reacted with one or more hydroxyl groups of the hydroxyl containing compound and at least another of the reactive groups is reacted with a hydroxyl group of a hydroxyl containing rosin ester resin.

The invention relates to the technical field of new energy and mining and blasting, in particular to a preparation method of a biomass instantaneous cracking agent. The preparation method comprises the following steps: mixing biomass powder, pulverized coal, an oxidant, a catalyst and a release agent to obtain mixed powder; mixing the adhesive, the water and the preservative to prepare a glue solution; the glue solution and the mixed powder are kneaded, granulated and dried, and the biomass instantaneous cracking agent is obtained, the biomass powder accounts for 4-55 parts by mass, the pulverized coal accounts for 0-48 parts by mass, the oxidizing agent accounts for 0-45 parts by mass, the catalyst accounts for 0-20 parts by mass, the release agent accounts for 0-2.5 parts by mass, the adhesive accounts for 2-10 parts by mass, the preservative accounts for 0-0.15 part by mass, and the oxidizing agent and the catalyst are not 0 at the same time; the oxidizing agent is potassium peraluminate powder and / or ammonium perchlorate powder; the catalyst is potassium nitrate powder and / or sodium nitrate powder. The biomass instantaneous cracking agent prepared by the invention solves the problems of long stone cracking time, low efficiency and environmental pollution of the existing stone cracking agent.

A functionally-graded regolith-based energetic fuel and methods for powering heating systems to help humans and equipment operate in harsh lunar conditions are disclosed. A muti-functionally graded material includes energetic particles comprising a metallic fuel and a regolith-based oxidizer. The energetic particles and the regolith-based oxidizer are mixed to form an energetic material. A regolith-based combustible material is disclosed comprising: micro-magnesium in 20%, 30% or 40% w / w; and a regolith-based oxidizer, wherein the material is ball milled for up to 5 hours.

The invention discloses a nitrogen-rich energetic ionic salt compound based on bis-(5-aminotetrazole) boron. The nitrogen-rich energetic ionic salt compound comprises bis-(5-aminotetrazole) boric acid guanidine salt (I), bis-(5-aminotetrazole) boric acid aminoguanidine salt (II) and bis-(5-aminotetrazole) borane perchlorate (III), the structural formulas of the compounds are shown as (I)-(III). The compound can be used for mixed explosives and fuel-rich propellants.

The invention belongs to the technical field of chemical engineering, and relates to a composition for a detonation sound agent, the detonation sound agent and a preparation method and application of the detonation sound agent. The technical problems that in the prior art, pyrotechnic composition and aluminum magnesium alloy powder serve as raw materials, potential safety hazards exist in the preparation and storage process, sulfur dioxide generated after combustion easily forms acid rain, and the detonation sound value does not reach the standard are solved. The invention provides a composition for a detonation sound agent, which comprises the following raw materials: 75-85 wt% of lead tetraoxide, 10-15 wt% of aluminum-silicon alloy powder and 5-10 wt% of nitrocellulose gum solution, and has the effects of high detonation sound value, high stability and safety, and suitability for large-scale industrial production and use. The invention further provides a detonation sound agent and a preparation method of the detonation sound agent. Meanwhile, the invention further provides application of the detonation sound agent in preparation of the bird repelling bomb, when the explosive quantity is 300 mg, the set-off sound level value at the position 2 m away from the acting position can reach 120 dB or above, and the good high-altitude bird repelling effect is achieved.

The purpose of the present invention is to provide a gas-generating agent composition that ignites at a relatively low temperature stage at which a gas generator does not explode. Provided is a gas-generating agent composition that contains a fuel component and an oxidizing agent component, the gas-generating agent composition containing, as the fuel component, a compound having a lactone structure having a melting point or a decomposition point of 90°C to less than 250°C.

The present invention discloses an atomically polymerized nitrogen material and a preparation method thereof, belonging to the technical field of energetic materials, and solves one of the following problems: (1) the relatively harsh conditions for synthesizing cg-PN; and (2) the low content of cg-PN prepared by the prior art. The preparation method of the present invention obtains the atomically polymerized nitrogen material by directly quenching an azide compound from a high temperature to room temperature under high pressure. The cg-PN prepared by the preparation method of the present invention has high yield and can be recovered under conventional conditions, and has potential application value in the field of energetic materials.

The invention relates to the technical field of tunnel construction, and particularly discloses a high-energy gas fracturing device which comprises an electric ignition head, a charging paper bag and a gas producing agent filled in the charging paper bag. One end of the electric igniter is fixed at the bottom center of the charging paper bag, and the other end penetrates through the charging paper bag and extends out; the gas production powder is ignited through the electric ignition head, the gas production powder is combusted to generate high-energy gas, and the restraining body around the powder containing paper bag is fractured; wherein the gas production medicine is prepared from 5-aminotetrazole, FOX12, an oxidizing agent strontium nitrate and a process additive.

The application discloses an end hexaazido nitrate polyether adhesive and a synthesis method thereof. The method first takes triazido neopentyl alcohol and glycidyl ether nitrate as raw materials, boron trifluoride-ether complex as a catalyst, and obtains triazido neopentyl polyglycidyl ether nitrate alcohol through cation ring-opening polymerization reaction; then takes triazido neopentyl polyglycidyl ether nitrate alcohol and hexamethylene diisocyanate as raw materials, dibutyl tin dilaurylate as a catalyst, and obtains end hexaazido polyglycidyl ether nitrate through addition reaction, namely the end hexaazido nitrate polyether adhesive. The application is mainly used for solid propellants, is used for synthesizing polytriazole elastomers, improves the content and crosslinking density of hard segments, promotes microphase separation of the elastomers, and thus improves mechanical properties.

The present invention relates to a composition comprising at least one amine selected from the group consisting of N,N,N',N'-tetramethylethylenediamine, N,N,N',N'-tetramethylpropylenediamine, 1,8-diazabicyclo[5.4.0]undec-7-ene, N,N-dimethylethylenediamine, 4-methylmorpholine, dimethyl-(2-azidoethyl)amine and mixtures thereof; at least one organic solvent selected from the group consisting of acetonitrile, dimethyl isosorbide, acetone, and mixtures thereof; and at least one carboxylic or sulfate salt of a transition metal; wherein the transition metal is completely dissolved in the composition. The invention also relates to hypergolic compositions and uses thereof.

The invention provides an energetic composite material with a micro combustion chamber structure and a preparation method thereof, and the method comprises the following steps: step 1, preparing a composite combustion catalyst: taking a two-dimensional nanosheet material as a carrier, and realizing uniform loading of a nano catalyst through an interface engineering method to obtain the composite combustion catalyst; 2, constructing a three-dimensional porous network structure: constructing the composite combustion catalyst obtained in the step 1 into a porous network combustion catalyst with the three-dimensional porous network structure; and 3, preparing the energetic composite material: adding an oxidizing agent, energetic explosive powder and metal powder into an adhesive, stirring to form energetic material slurry, adding the energetic material slurry into the porous network combustion catalyst obtained in the step 2, and carrying out vacuum impregnation and curing for 12-48 hours to obtain the energetic composite material with the micro combustion chamber structure. The porous network combustion catalyst is preformed, so that the dispersion state of the nano-catalyst is effectively controlled, and the catalytic effect of the nano-catalyst is improved.

The invention discloses aluminum-based powder fuel with a grain boundary oxygen vacancy channel and a preparation method and application of the aluminum-based powder fuel, and particularly relates to the technical field of metal fuel and aluminum-based alloy powder fuel. The method comprises the following steps: heating and melting pure aluminum to form an aluminum melt; then, Al-RE intermediate alloy is added into the aluminum melt, and the total content of the rare earth element RE in the melt is adjusted to be 0.1-7 wt%; and finally, the uniformly mixed melt is subjected to controlled supersonic atomization and rapid solidification, and the aluminum-based alloy powder is obtained. According to the invention, after powder combustion, a rare earth oxide channel rich in oxygen vacancy defects is constructed at a crystal boundary, and then oxidative combustion is further promoted. Lattice distortion and in-situ solid solution of boron atoms are caused by the radius difference of double rare earth (Ce / La) atoms, so that the formation energy of oxygen vacancies is greatly reduced. In the combustion process, high-concentration oxygen vacancies form a high-speed oxygen transmission channel, barrier of a compact oxidation film is broken, oxygen can rapidly permeate into particle cores, and the burn-off rate and energy release efficiency of aluminum powder are remarkably improved.

The invention belongs to the field of metal fuels, and discloses an in-situ fluorination activity protection process and application of an aluminum-lithium alloy fuel, a fluorination method comprises the following steps: putting aluminum-lithium alloy fuel particles to be fluorinated into a fluidized bed filled with a protective gas, and forming a fluidized state; and then mixed gas of protective gas and fluorine gas is introduced into the fluidized bed, fluoridation reaction is carried out on the aluminum-lithium alloy fuel particles based on a fluidized bed-chemical vapor deposition process, and the aluminum-lithium fluoride alloy fuel particles with fluoride protective layers on the surfaces can be obtained. A fluidized bed-chemical vapor deposition process is used for carrying out fluorination reaction on aluminum-lithium alloy fuel particles, so that the metal fuel with a fluorinated protective layer, good compatibility and good oxidation resistance is obtained; the problems that aluminum-lithium alloy powder in existing alloy fuel is difficult to be compatible with other components in a solid propellant, easy to oxidize and difficult to store for a long time are solved.

The present invention relates to nanostructured materials, in particular to the preparation method of silicon-based field-effect transistors. The object of this invention consists of a method for manufacturing a field-effect transistor comprising the following steps: depositing a gate electrode layer onto a dielectric layer; depositing a priming layer said dielectric layer; forming a source electrode and a drain electrode by depositing conductive material on said priming layer and forming a semiconductor layer on top of the source and drain electrodes wherein the priming layer comprises a conductive material and the semiconductor layer comprises a porous polycrystalline silicon-based material, being said porous polycrystalline silicon-based material. The proposed invention aims to combine the potential of polymer-based dielectric materials and Si-based semiconductor to fabricate a FET device that can be more sustainable, readily available and low cost.

The invention discloses a micro gas generator homogeneous mixed medicament for a safety belt and a preparation method of the micro gas generator homogeneous mixed medicament, the micro gas generator homogeneous mixed medicament is prepared from the following components in percentage by mass: 90-97% of green gas generating medicament particles and 3-10% of nitrocellulose medicament particles uniformly dispersed in gaps of the green gas generating medicament particles, and the sum of the mass percentages of the components is 100%. By utilizing the advantages of high combustion speed and low ignition threshold of the nitrocellulose agent, the ignition delay and the combustion period of the mixed agent are shortened, the exposure time of the safety belt elbow in a high-temperature environment is shortened, the structural strength of the safety belt elbow is ensured, the problem of elbow explosion in a bonfire test is finally solved, and meanwhile, the environment-friendly characteristic of a green gas-producing agent is reserved; in addition, through the two-time charging process of the automatic production line, the mixed charging efficiency is high, and the product consistency is good.

A multi-purpose hose is described, which reduces the time required for the loading procedure of the borehole drillings, said hose comprising multiple inner ducts, where signal cables, power supply, inspection probes and sensors are introduced, and it further allows injecting different fluids such as air, water, emulsions, etc. separately. Likewise, the described hose allows transporting the different components to prepare explosive emulsions separately and only combines them by introducing the same inside the borehole drilling in the hose outlet.

The application discloses a fluorine-containing acrylic ester ternary random copolymer modifier, a preparation method of modified boron powder and application of the fluorine-containing acrylic ester ternary random copolymer modifier, and particularly relates to the following steps: (1) mixing three fluorine-containing acrylic esters with different fluorocarbon chain lengths at normal temperature, adding a free radical initiator to obtain a fluorine-containing acrylic ester mixture; (2) adding the fluorine-containing acrylic ester mixture into a flask containing a solvent and dodecyl mercaptan in batches under N2 atmosphere, and performing a free radical polymerization reaction by increasing temperature; (3) purifying the product obtained in the step (2) by using methanol as a washing agent, and vacuum drying to obtain a fluorine-containing methacrylic ester ternary random copolymer; and the modifier is used for modifying boron powder, a fluorine-containing coating layer with high fluorine density is constructed on the surface of the boron powder by using the random copolymer of the three fluorine-containing acrylic esters with different fluorocarbon chain lengths, and the problems of easy agglomeration, low flowability, ignition difficulty and low combustion efficiency of amorphous boron powder as a fuel component in a boron-containing fuel-rich propellant are solved.

The application discloses a preparation method of Al / NH4CuF3 metastable intermolecular complex. The method is characterized in that: firstly, NH4CuF3 with a nano-network structure is prepared through a solvothermal reaction; then, n-Al is filled into the nanopore channels of the NH4CuF3 in a manner of ultrasonic-assisted dispersion, so as to form n-Al / NH4CuF3 MICs with good dispersity. The n-Al / NH4CuF3 MICs prepared by the method can etch a passivation layer and reduce the reaction energy barrier of the aluminum powder and an oxidizing agent, depending on the low-temperature decomposition of the NH4CuF3 to release F and the thermal decomposition of the NH4CuF3 to generate HF. In addition, a large amount of gaseous products are generated by the decomposition of the NH4CuF3, so that the generation of a reaction sintering phenomenon is relieved, and the combustion efficiency of the n-Al is improved.

The present invention relates to a composition comprising at least one amine selected from the group consisting of N,N,N',N'-tetramethylethylenediamine, N,N,N',N'- tetramethylpropylenediamine, 1,8-diazabicyclo[5.4.0]undec-7-ene, N,N- dimethylethylenediamine, 4-methylmorpholine, dimethyl-(2-azidoethyl)amine and mixtures thereof; at least one organic solvent selected from the group consisting of acetonitrile, dimethyl isosorbide, acetone, dimethylsulfoxide, and mixtures thereof; and at least one carboxylic, nitrate, or sulfate salt of a transition metal; wherein the transition metal is completely dissolved in the composition. The invention also relates to hypergolic compositions and uses thereof.