82results about "Explosives" patented technology

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 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 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 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 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 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.

This invention discloses a method for preparing a ceramic matrix composite material on the surface of a metal pipe, comprising the following steps: S1, pretreating the surface of the metal pipe to improve its surface roughness; S2, wrapping alumina fiber cloth or high-silica fiber cloth around the surface of the metal pipe obtained in step S1 using an adhesive, thereby forming a buffer layer on the surface of the metal pipe; S3, wrapping carbon cloth or silicon carbide fiber cloth on the buffer layer on the surface of the metal pipe, and filling it with a high-temperature adhesive, followed by low-temperature curing and high-temperature sintering to form a flexible interface layer between the high-temperature adhesive and the carbon cloth or silicon carbide fiber cloth on the surface of the buffer layer; S4, depositing an energetic thin film on the flexible interface layer, and igniting the energetic thin film using a laser or electric spark to rapidly ceramicize the buffer layer and the flexible interface layer, forming a ceramic matrix composite material on the surface of the metal pipe. The resulting ceramic matrix composite material exhibits a high degree of interfacial bonding strength with a thermal expansion coefficient that closely matches the matrix thermal expansion coefficient.

The subject of the invention is a solid rocket propellant grain comprising frontal surfaces and a lateral surface, characterised in that it comprises a first type layer which is completely filled in cross-section with a solid propellant material with an inhibited lateral surface (101a), and a second type layer which has at least one recess (103) in a solid propellant material with a non-inhibited lateral surface (101b), wherein at least one second type layer is surrounded by the first type layer on both sides.

An apparatus and methods for sealing a wellbore extending through a rock formation. An implementation of such apparatus comprises a delivery apparatus configured to be conveyed within the wellbore, wherein the delivery apparatus comprises a chamber therein, and a sealing material disposed within the chamber. The sealing material is configured to undergo an exothermic reaction when ignited. The exothermic reaction produces a molten bonding material. The delivery apparatus is configured to direct the molten bonding material into the wellbore such that the molten bonding material contacts the rock formation. The molten bonding material bonds with the rock formation when the molten bonding material solidifies thereby sealing the wellbore.

This invention discloses a highly active, concentrated exothermic Al-In-Sn alloy fuel and its preparation method. By controlling the alloy's melting temperature, casting temperature, and composition, this invention prepares a liquid-phase two-phase separated alloy in which the minority phase is uniformly distributed on the surface of the majority phase, forming a core-shell structure where the minority phase encapsulates the majority phase. The aluminum alloy fuel described in this invention has a combustion temperature of 930℃~980℃, an exothermic heat of 2485μvs / mg~4388μvs / mg, and a combustion efficiency of up to 0.76. Compared with pure Al powder fuel, the alloy fuel provided by this invention can reduce the combustion temperature by up to 107℃ and increase the exothermic heat by up to 11.48 times. It effectively achieves the goals of high energy density, high combustion efficiency, and low combustion temperature, showing great application potential in the fields of solid propellants and explosives.

The application discloses an aluminum-based powder fuel with a grain boundary oxygen vacancy channel and a preparation method and application thereof, 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 adding an Al-RE intermediate alloy into the aluminum melt, and adjusting the total content of rare earth elements RE in the melt to be 0.1-7 wt%; finally, performing controlled supersonic atomization rapid solidification on the uniformly mixed melt to obtain an aluminum-based alloy powder. After the powder burns, a rare earth oxide channel rich in oxygen vacancy defects is constructed at the grain boundary, and the oxidation combustion is further promoted. The lattice distortion caused by the difference in atomic radii of double rare earth (Ce / La) and the in-situ solid solution of boron atoms greatly reduce the formation energy of oxygen vacancies. In the combustion process, high-concentration oxygen vacancies form a "high-speed oxygen transmission channel", break the barrier of the dense oxide film, and enable oxygen to quickly penetrate into the particle core, thereby significantly improving the burnout rate and energy release efficiency of the aluminum powder.

The application 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 uses a Q235B steel plate as a base plate and a tin-phosphor bronze plate as a composite plate, lays, from bottom to top, a backing plate, the Q235B steel plate, a supporting column, the tin-phosphor bronze plate, a protective layer, an enclosure structure, a low-explosive-speed rock expanded ammonium nitrate oil explosive layer and an inert layer on an explosion field, and then causes the tin-phosphor bronze plate and the Q235B steel plate to collide at a high speed by detonating the explosive, so that metallurgical combination is caused, a large-size tin-phosphor bronze / Q235B composite plate is obtained, the interface bonding rate of the obtained composite plate is greater than 98%, the interface shear strength is greater than 274 MPa, and the composite plate has the excellent high strength, wear resistance and other performances of the tin-phosphor bronze and the low-cost advantage of the Q235B steel.

This invention discloses an oxygen- and nitrogen-rich pentazolium ion salt based on a stepwise metathesis reaction and its synthesis method. It utilizes a distributed metathesis process to effectively combine high-energy ionic components with oxidizing and reducing properties, constructing oxygen- and nitrogen-rich high-energy molecules. The invention provides a method for synthesizing the oxygen- and nitrogen-rich pentazolium ion salt, using reducing nitrogen-rich compounds 4,5-diamino-3-aminomethyl-1,2,4-triazole and pernitrogen pentazolium ions, and oxidizing dinitramide ions as raw materials. Through a distributed metathesis reaction, ionic bonds are used to combine the components, yielding the oxygen- and nitrogen-rich pentazolium ion salt assembly material. The synthesis method of this invention is characterized by its simplicity, short reaction time, and high yield.

The invention belongs to the technical field of energetic materials, and discloses a novel diamine ternary self-assembly energetic material and a preparation method thereof. The chemical structural unit of the energetic material is composed of a double-protonated ethylenediamine cation, a double-protonated propane diamine cation and four perchlorate anions, the crystal of the energetic material belongs to a monoclinic system, and the space group of the energetic material is P21 / c. The material shows excellent comprehensive performance, including positive oxygen balance, positive enthalpy of formation, high theoretical specific impulse and good thermal stability and moisture absorption resistance. The preparation method comprises the following steps: dissolving ethylenediamine and propane diamine in water to form a mixed solution, then adding a perchloric acid aqueous solution, magnetically stirring to separate out a white solid, and filtering to obtain a target product. The method takes water as a solvent, is simple in process, environment-friendly, low in cost and suitable for large-scale production, and provides a novel component which is high in performance and green in preparation for the field of energetic materials.

The present invention relates to a solid porous material for hydrogen gas generation, the material having a porosity of 20-75% by volume and a composition comprising, by weight of the material, 50-99% borohydride compound and 1-30% binder. Further aspects of the invention relate to gas generators comprising the material and its use in aerospace applications.

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 an ether-containing energetic adhesive as well as a preparation method and application thereof. The ether-containing energetic adhesive comprises epoxy resin and a curing agent. The epoxy resin comprises a structural resin component and an energetic resin component, a molecular main chain of the structural resin component comprises at least one rigid structural unit selected from a six-membered alicyclic ring and a benzene ring, a molecular main chain of the energetic resin component comprises an ether bond structural unit, 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, wherein the structural curing agent component is selected from at least one of alicyclic amine and aromatic amine, and the energetic curing agent component is selected from at least one of polyether amine. The proportion of a rigid structure and a flexible easily-pyrolyzed structure of a cross-linked network is regulated and controlled through molecular design, so that the material has high mechanical strength and efficient combustion performance, and is suitable for the field with comprehensive requirements on the structure and energy release.

The invention discloses a synthesis method of a tetra-substituted (4-nitroimidazole) borane compound, which comprises the following steps: adding anhydrous CH2Cl2 into a single-mouth flask at-20 DEG C, mixing 4-nitroimidazole with the anhydrous CH2Cl2, quickly injecting BCl3, and stirring; the subsequent reaction is detected through 11B NMR to ensure that BCl3 is completely converted; after filtering, washing by using a mixed solution of ethanol and acetonitrile, and filtering and drying to obtain white powder, namely a target compound with a structural formula as shown in the specification. The tetra-substituted (4-nitroimidazole) borane compound disclosed by the invention is relatively good in density sensitivity, relatively simple in synthesis method and relatively mild in reaction condition.

The invention discloses a preparation method of a solid propellant containing alkali metal. The preparation method comprises the following steps: step 1, mixing and stirring an adhesive, metal aluminum powder, ammonium perchlorate, alkali metal salt powder, tris (2-methyl-1-aziridine) phosphine oxide and a polymerizing agent to obtain slurry; step 2, carrying out negative pressure pouring on the explosive slurry to obtain an explosive column; and 3, the grain is dried, cured and demolded, and the solid propellant containing the alkali metal is obtained. According to the preparation method, the solid propellant which is relatively rapid in response to microwave energy and relatively efficient is prepared at relatively low cost.