161results about "Explosives" patented technology

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 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.

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 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 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 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.

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.

The invention discloses a room-temperature self-repairing polyurethane adhesive for a propellant and a preparation method of the room-temperature self-repairing polyurethane adhesive for the propellant, and the molecular structural formula of the room-temperature self-repairing polyurethane adhesive for the propellant is shown in the specification, n is an integer ranging from 25 to 35, and the wavy lines at the two ends represent a plurality of repetitive units; and the molecular weight range is 20000 to 50000 Da. The adhesive can realize self-repairing at room temperature, has high mechanical properties, tensile strength of 14.9 MPa and elongation at break of 1710%, can recover to 90.6% of the original mechanical properties after being repaired again after being cut off and placed at room temperature for 24 hours, and has wide application prospects in the field of propellants.

The application discloses a device and method for recycling emulsifier production waste, and relates to the technical field of environmental protection. The device for recycling emulsifier production waste comprises a material mixing screw, the front end of the material mixing screw is an expanded nitram feeding port, the rear end of the material mixing screw is an expanded explosive discharging port, and the device further comprises a reaction kettle used for containing waste oil. A stirring fin is arranged in the reaction kettle, and a material inlet is arranged at the upper end of the reaction kettle. A wood powder feeding port, a composite oil phase feeding port and a waste oil feeding port are arranged on the material mixing screw, and the waste oil feeding port is connected with the reaction kettle. The waste oil is added into the expanded explosive as a reducing agent of an explosion reaction, the waste oil participates in the explosion reaction, the waste oil is destroyed and treated, the production cost of the explosive is reduced, environmental pollution is avoided, and the device has the advantages of simplicity and effectiveness.

The invention discloses an energetic material, a preparation method thereof and application of the energetic material as an initiating explosive, an explosive and a pyrotechnic compound. The chemical formula of the energetic material is MC10H18B2N6; wherein M is selected from at least one of Mn, Fe, Co, Ni, Cu, Zn and Cd; the crystal structure of the energetic material belongs to a monoclinic system, and the space group is P21 / n. The obtained energetic material has excellent stability and safety, and is green and environment-friendly. Through experimental determination, the thermal stability is greater than or equal to 120 DEG C, the impact sensitivity is greater than or equal to 40J, and the friction sensitivity is greater than or equal to 240N. Compared with an existing commercial propellant (unsymmetrical dimethylhydrazine), the ignition delay time of the energetic material is equivalent, the defects that fuel and an oxidizing agent are seriously mixed and the combustion efficiency is low are overcome, and the energetic material has important commercial application value in the field of green high-performance energetic materials.

Provided are nitrogen allotropes, their synthesis apparatus setups, and their application as high energy density materials. Methods for their preparation are also provided.

The invention discloses a large-size tin-phosphor bronze / Q235B composite plate and a preparation method thereof, and belongs to the field of material forming, the method comprises the following steps: by taking a Q235B steel plate as a base plate and a tin-phosphor bronze plate as a compound plate, sequentially laying a base plate, the Q235B steel plate, a support column, the tin-phosphor bronze plate, a protective layer, a fence structure, a low-detonation-velocity rock expanded ammonium nitrate fuel oil explosive layer and an inert layer on an explosion field from bottom to top, and forming the composite plate. And then the tin-phosphor bronze plate and the Q235B steel plate are subjected to metallurgical bonding after high-speed collision by detonating the explosive, the large-size tin-phosphor bronze / Q235B composite plate is obtained, the interface bonding rate of the obtained composite plate is larger than 98%, the interface shear strength exceeds 274 MPa, and the composite plate has the advantages of excellent high strength, wear resistance and the like of tin-phosphor bronze and low cost of Q235B steel.

The application discloses a kerosene gel propellant and a preparation method thereof, and belongs to the technical field of propellants. The propellant provided by the application comprises the following components in mass ratio: kerosene 37wt.%-68wt.%, modified boron 30wt.%-60wt.%, and gelling agent 2wt.%-5wt.%. The modified boron is halogen alkyl silane functionalized boron obtained by chemical combination of halogen alkyl silane and boron, and the halogen alkyl silane functionalized boron comprises a -B-O-Si- framework. The stable and controllable coating layer is obtained on the surface of boron particles by modifying the boron through halogen alkyl silane functionalization, and the higher content of boron particles is stabilized in kerosene. In addition, the high active halogen free radicals can be generated in the combustion process, the ignition and combustion of boron are accelerated, and the carbon deposition effect of kerosene hydrocarbons is reduced. The propellant has higher stability, excellent ignition performance and higher combustion efficiency.

The application discloses an ether-containing energetic binder, a preparation method and application, and the ether-containing energetic binder comprises an epoxy resin and a curing agent. The epoxy resin comprises a structural resin component and an energetic resin component, the rigid structural unit selected from at least one of a six-membered alicyclic ring and a benzene ring is contained in a molecular main chain of the structural resin component, the ether bond structural unit is contained in a molecular main chain of the energetic resin component, and the molar ratio of the energetic resin component to the structural resin component in the epoxy resin is 1:4-9; the curing agent comprises a structural curing agent component and an energetic curing agent component, the structural curing agent component is at least one selected from at least one of an alicyclic amine and an aromatic amine, and the energetic curing agent component is at least one selected from at least one of a polyether amine. The rigidity structure and the flexible and pyrolysis structure ratio of the crosslinking network are regulated through molecular design, so that the material has high mechanical strength and high efficient combustion performance, and is suitable for the field with comprehensive requirements on structure and energy release.

The invention discloses a single-component transportable propellant and a preparation method thereof, and relates to the technical field of propellants, the single-component transportable propellant comprises the following components by mass: 30%-45% of an oxidant, 10%-20% of modified aluminum powder, 5%-15% of water, 20%-40% of a PEPA adhesive, 0.5%-3% of a gel and 0.1%-0.5% of a stabilizer. According to the propellant, a targeted gelling agent is adopted in a formula system, so that liquid components are gelatinized, solid particles are uniformly dispersed in the gelling agent, the propellant is in a semi-solid state at the temperature of-10 DEG C to 50 DEG C, the propellant becomes thin and can flow after being pressurized or sheared, the working mode of stable storage under the semi-solid state condition and the working mode of conveying under the liquid state condition are achieved, and the propellant can be used for a thrust adjusting engine; the propellant can maintain high energy performance through the technical ways of adding an energetic adhesive, a high-energy oxidant, modified Al powder and the like.

The invention relates to an aqueous slurry composition comprising an aqueous-baed polymeric binder and anionic oxide nanoparticles that can be used, for example, in coating of electrodes and / or separators in electrochemical devices. This coating after drying, is highly porous, electronically isolating, and exhibits high dimensional stability at elevated temperatures.