39results about "Nitrated explosive compositions" patented technology

The invention belongs to the technical field of energetic materials, and provides a smokeless sulfur-free firework propellant and a preparation method thereof. The invention provides a preparation method of smokeless sulfur-free firework propellant powder. According to the invention, the first cotton nitrocellulose and / or the second cotton nitrocellulose are / is used as nitrocellulose, so that the finally obtained firework propellant powder is smoke-free and sulfur-free, and has an excellent gunpowder force value. The preparation method provided by the invention is simple and easy to operate. The nitrogen content of the smokeless sulfur-free firework propellant provided by the invention is 6.813 to 12.6 percent, the viscosity of the smokeless sulfur-free firework propellant is 3.24 to 4.9 DEG C, the apparent density of the smokeless sulfur-free firework propellant is 0.82 to 0.89 g / cm < 3 >, the gunpowder force of the smokeless sulfur-free firework propellant is 842.6 to 897.6 kj / kg, the specific heat ratio of the smokeless sulfur-free firework propellant is 1.1023 to 1.2588, the flame temperature of the smokeless sulfur-free firework propellant is 1435 to 2042 K, and the residual capacity of the smokeless sulfur-free firework propellant is 776 to 1067 cm < 3 > / kg.

Disclosed is a photocurable and combustible composition, including an energetic prepolymer, a diluent and a photoinitiator; where the energetic prepolymer is one of or a mixture of two of acrylate-terminated poly(3-nitratomethyl-3-methyloxetane) and acrylate-terminated poly(glycidyl nitrate). The photocurable and combustible composition has an energetic group, i.e., a nitrate group, which can be subjected to self-sustaining combustion in an oxygen-free environment, and the composition can be used to prepare combustible components such as combustible ordnance components.

The invention discloses a double-base propellant gelling material substitute and a preparation method and application thereof, and the double-base propellant gelling material substitute comprises the following components by mass: 10%-20% of an absorption tablet, 40%-60% of nitrocellulose, 20%-35% of a plasticizer, 10%-20% of an inert filler and 1%-5% of a stabilizer, totaling 100%. Preparing a mixed solvent of acetone and absolute ethyl alcohol; weighing a stabilizer, pouring the stabilizer into the mixed solvent, and stirring until the stabilizer is completely dissolved in the mixed solvent; the absorption tablets, nitrocellulose, the plasticizer and the inert filler are mixed and poured into a kneading machine, the mixed solvent dispersed with the stabilizer is poured into the kneading machine, and the mixture is kneaded to form gelling powder strips, so that the double-base propellant gelling material substitute is obtained. The substitute material of the gelling material of the double-base propellant prepared after gelling and the real double-base propellant have high consistency in density, viscosity, specific heat capacity and other key performance parameters, and can effectively replace the real double-base propellant to be used for experimental research and performance test.

The invention discloses a composite energetic material and a preparation method and application thereof, the composite energetic material provided by the invention is a composite energetic material of ammonium salt and FOX-7, and the ammonium salt comprises one or more of ammonium chloride, ammonium bromide, ammonium dihydrogen sulfate and ammonium sulfate. By constructing a composite system, the high-temperature decomposition peak temperature of the FOX-7 can be increased, the apparent thermal activation energy can be increased, low-temperature decomposition can be inhibited, and the thermal stability of the FOX-7 can be remarkably improved. Compared with complex processes (such as electrostatic spraying, ultrasonic-assisted precipitation-spray drying and the like) in the prior art, the composite energetic material provided by the invention can be realized only by mixing and grinding, and the thermal stability of FOX-7 is remarkably improved by constructing a composite system.

The present invention provides an explosive composition containing at least one explosive and at least one heteroatom compound, the heteroatom compound including at least one type of heteroatom selected from the group consisting of B, P, Si, S, Cr, Sn, Al, Ge, Li, Na, K, Cs, Mg, Ca, Sr, Ba, Ti, Zr, V, Nb, Ta, Mo, W, Mn, Ni, Cu, Ag, Cd, Hg, Ga, In, Tl, As, Sb, Bi, Se, Te, Co, Xe, F, Y, and lanthanoids.

The invention discloses a nitrogen-rich multi-hydrogen solid-liquid mixed propellant fuel and a preparation method thereof. The fuel is prepared by taking paraffin as a matrix, mixing the paraffin with nitrogen-rich multi-hydrogen green high-energy particles (composed of a nitrogen-rich multi-hydrogen azole material, a catalyst and a binder) and adopting a temperature control'kneading-die casting 'process, and the fuel comprises the following components in percentage by mass: 30-95% of the paraffin matrix and 5-70% of the nitrogen-rich multi-hydrogen green high-energy particles (95-99.4% of the nitrogen-rich multi-hydrogen azole material, 0.5-3.5% of the catalyst and 0.1-1.5% of the binder). The preparation method comprises the following steps: performing interface compounding treatment on a nitrogen-rich multi-hydrogen azole material, a catalyst and a binder to form nitrogen-rich multi-hydrogen green high-energy particles, and uniformly dispersing the particles into a paraffin matrix through a temperature-controlled'kneading-die-casting 'process. By introducing the azole material, the combustion retrogradation rate and the energy density of the fuel are remarkably improved, and meanwhile, the problem of solid product generation is avoided; and meanwhile, the preparation process solves the problems of particle sedimentation and internal fracture of the traditional high-solid-content fuel, and realizes the uniformity and high safety of the fuel. The propellant fuel disclosed by the invention is suitable for a propulsion system of a solid-liquid hybrid rocket, and has the advantages of greenness, safety, high energy and the like.

The invention discloses the use of a cyclodextrin potassium metal organic framework as a flame extinguisher in the preparation of propellants. The invention mixes the cyclodextrin potassium metal organic framework with dry nitrocellulose, adds acetone and ethanol to mix evenly, and then extrude into a tubular structure of NC@CD-MOF propellant. The cyclodextrin potassium metal organic framework has good compatibility and flame suppression with nitrocellulose, the main energy material for propellants. When used as a flame extinguisher, the flame extinguishing element potassium in the cyclodextrin potassium metal organic framework is easy to decompose and release compared with inorganic potassium salts, and the hygroscopicity of a certain amount of cyclodextrin potassium metal organic framework is reduced after being compounded with nitrocellulose, which is beneficial to the storage stability of nitrocellulose, thereby obtaining a high-efficiency flame extinguisher with long storage performance that meets the use requirements, reducing the muzzle flame generated when a barreled weapon is fired, and will not affect the ballistic performance of the ammunition.

The application discloses an energetic metal complex and a synthesis method thereof, and the method is characterized by the molar ratio of 3-aminomethyl-4,5-diamino-1,2,4-triazole, rubidium nitrate and nitric acid being 1:1:1-6, after the feeding is completed, the reaction system is heated to 25-100 DEG C to react, and the reaction time is 0.5-4 hours. After the reaction is completed, the reaction system is cooled to room temperature, filtered, washed and dried to obtain the energetic metal complex [TATT][Rb](NO3)3. The triazol ring with high nitrogen content is selected as a basic skeleton, and the metal complex is obtained by further reacting with the rubidium nitrate and the nitric acid, the single crystal density of the metal complex at normal temperature reaches 2.078 g / cm 3 , the thermal stability reaches 230 DEG C, the electronic density is as high as 4.6419*10 21 / m 3 , the electronic temperature reaches 0.58683 eV, and the metal complex has a great application prospect in the direction of plasma explosives.

The invention provides a preparation method of quaternary coated superfine ammonium perchlorate. Comprising the following steps: step 1, carrying out ball milling treatment on coarse-particle ammonium perchlorate to obtain superfine ammonium perchlorate powder; step 2, performing quaternary coating on the superfine ammonium perchlorate powder: (1) dissolving nitrocotton, fluororubber, 2, 4-dinitroanisole and octadecylamine in a mixed azeotropic solvent composed of acetone and ethyl acetate to obtain a solution A; (2) adding nano graphite and superfine ammonium perchlorate powder into the solution A, and performing ultrasonic treatment and stirring to obtain a muddy mixture; and (3) putting the muddy mixture into a culture dish, and drying in a water bath drying oven. The quaternary coating treatment method adopted by the invention is very effective for reducing the sensitivity of the superfine AP, and particularly, the friction sensitivity is greatly reduced; in addition, the quaternary coating treatment is also very effective for reducing the moisture absorption of the AP; but the energy performance and the inner ballistic performance of the propellant are hardly influenced.

The invention belongs to the field of production and manufacturing of energetic materials for fireworks and crackers, and particularly relates to a preparation method of a nitrocotton-based pyrotechnic composition for fireworks and crackers. The preparation method comprises the following steps: sequentially adding water, nitrocotton, a stabilizing agent and ethyl acetate into a reaction kettle provided with a heating and stirring device, then adding protective glue, continuously stirring, adding a sodium sulfate solution into the reaction kettle, dehydrating, adding microcrystalline wax / paraffin into the reaction kettle after the particle morphology is stable, and continuously stirring; melting microcrystalline wax / paraffin under the stirring action, and uniformly coating the surfaces of the nitrocotton particles with the microcrystalline wax / paraffin to form a layer of hydrophobic protective film, so as to obtain a semi-finished product; washing with warm water to remove residual sodium sulfate, protective glue and a small amount of ethyl acetate; and drying the washed product at the temperature of lower than 50 DEG C to obtain a final gunpowder particle product. According to the method, the spherical and dense nitrocotton-based pyrotechnic composition particles with good surface coating can be prepared, and the free-running property, the combustion consistency and the moisture absorption resistance of the product are effectively improved.

The invention discloses a smokeless firework material and a preparation method thereof. The smokeless firework material comprises the following components: 60%-75% of nitrocotton, 5%-10% of nitroglycerin, 5%-25% of a plasticizer and 1%-2% of a stabilizing agent. The plasticizer is triacetin, dibutyl phthalate or diethyl phthalate, and the plasticizer is dibutyl phthalate or diethyl phthalate; the stabilizing agent is a methyl centralite agent or an ethyl centralite agent. The method comprises the following steps: weighing the raw materials according to the formula proportion, and preparing a mixed medicine material by utilizing a jet absorption process; then, after the treatment of a water expelling process, preparing into a drug group; and crushing the mixture into particles with the granularity of 80-150 meshes by using a hammer crusher, adding the particles into the smokeless firework powder according to the proportion of 20-40%, and mixing the particles with the oxidizing agent and the metal powder for use. After the smokeless firework powder is added into the smokeless firework material, the smokeless firework material has the characteristics of less smoke during combustion, less residue and the like.

A method of using cerium metal complexes / compounds to modify the burning rate of solid rocket motor propellants by preparing a double-based propellant composition including cerium metal ion.

The application provides a TNBA cast explosive and a preparation method thereof, and belongs to the technical field of cast explosive preparation. The TNBA cast explosive is prepared according to the mass percentage of 50.6-55.2% of a liquid carrier, 4.4-4.8% of a fluxing agent and 40-45% of a solid filler. The TNBA cast explosive prepared by the application has the following advantages: the liquid carrier and the fluxing agent have high density, low volatility, low toxicity, low sensitivity and good formability, and no shrinkage hole and crack after pouring; the solid filler has the characteristics of high energy, low sensitivity, high density and high explosion heat; the raw material cost is low, the preparation process is simple, and the explosive can be produced on a large scale; compared with the existing explosives, the cast explosive has high oxygen balance, can generate more heat, has high density, detonation velocity, explosion heat and explosion pressure, and low impact sensitivity, and has higher performance than ordinary explosives.

The invention discloses a method for preparing a microporous single-base flat-bulb explosive by adopting a microchannel reactor. The method comprises the following steps: dissolving nitrocotton in a solvent, emulsifying and foaming a solution as a dispersion phase, and adding a dispersing agent into water as a continuous phase; a cross-shaped micro-channel reactor is adopted, a dispersed phase is injected into a micro-channel through a main channel, and a continuous phase is injected into the micro-channel through double channels; the dispersion phase forms liquid drops under the action of shearing force of the continuous phase, a spherical structure is formed under the action of surface tension, the liquid drops are subjected to flooding and curing forming in a channel, and further curing and drying are carried out under the stirring condition in a collecting device to prepare the microporous single-base flat-bulb explosive. The microporous flat-bulb powder prepared by the method disclosed by the invention is uniform in particle size and controllable in component form, and has the advantages of controllable flat-bulb powder density, simple device, high efficiency, good stability, good repeatability and the like.

The present application relates to a kind of preparation method of preparation method of amino acid configuration's amphoteric energetic compound, belong to energetic material technical field.The present application is based on amino acid configuration, synthesis simultaneously possesses acidic and basic amino acid configuration's energetic compound.The present application also discloses the preparation method of amino acid configuration's energetic compound and the preparation method of corresponding cation salt and anion salt obtained by the reaction of different acid and base.From known available raw material, by one-step method, high yield is obtained simultaneously with acidic and basic amino acid configuration's energetic compound.The compound exists basic N atom and acidic N-H group, with amphoteric characteristics, can be reacted with different acid or base, generate corresponding ionic salt and water.The compound and its ionic salt are ideal insensitive high-energy molecule with good application prospect, with the potential as high-energy insensitive energetic material, provide new ideas for synthesis of new high-energy energetic compound in energetic material.

The invention discloses a novel multi-nitromethyl green energetic compound, and belongs to the technical field of energetic material synthesis and preparation. The compound is 5-(3, 4-dinitro-1H-pyrazol-5-yl)-3-(dinitromethyl)-1H-1, 2, 4-triazole dipotassium salt, and the structural formula of the compound is shown in the specification. The compound can be 9, 10-dinitro-2-(trinitromethyl)-pyrazol [1, 5-d] [1, 2, 4] triazole [5, 1-f] [1, 2, 3, 4] tetrazine. According to the invention, the multi-nitromethyl group is introduced into a pyrazole-triazole skeleton and a tetrazine fused ring skeleton as an energy group, so that the oxygen balance of molecules is improved, and the detonation performance of the energetic material is improved.

The invention discloses a high-density zero-oxygen-equilibrium hydrogen-free high-energy propellant component and a preparation method thereof, the molecular formula of the high-density zero-oxygen-equilibrium hydrogen-free high-energy propellant component is C6N20O12, the density is 1.913 gcm <-3 >, and the oxygen equilibrium of carbon dioxide is zero. The synthesis method comprises the following synthesis steps: dissolving 1, 2-bis (5-azido-1H-1, 2, 4-triazole-3-yl) diazene serving as a raw material in a potassium hydroxide solution to react with chloroacetone, and then carrying out nitration in nitric-sulfuric acid to obtain the 1, 2-bis (5-azido-1-(trinitromethyl)-1H-1, 2, 4-triazole-3-yl) diazene, namely the 1, 2-bis (5-azido-1-(trinitromethyl)-1H-1, 2, 4-triazole-3-yl) diazene. The 1, 2-bis (5-azido-1-(trinitromethyl)-1H-1, 2, 4-triazole-3-yl) diazene disclosed by the invention has the advantages of high density, zero carbon dioxide oxygen balance, excellent energy performance, high specific impulse, low characteristic signal (not generating water) and the like, and can be used as an environment-friendly propellant component.

To provide an explosive composition suitable for production of a nanodiamond doped with a heteroatom, a method for producing the explosive composition, and a method for producing a heteroatom-doped nanodiamond.SOLUTION: The present invention provides an explosive composition comprising at least one explosive and at least one heteroatom compound, the heteroatom compound comprising at least one heteroatom selected from the group consisting of B, P, Si, S, Cr, Sn, Al, Ge, Li, Na, K, Cs, Mg, Ca, Sr, Ba, Ti, Zr, V, Nb, Ta, Mo, W, Mn, Ni, Cu, Ag, Cd, Hg, Ga, In, Tl, As, Sb, Bi, Se, Te, Co, Xe, F, Y, and lanthanoid.SELECTED DRAWING: None

The invention relates to a fuel consisting of nitromethane for spacecraft and / or missiles, wherein the fuel contains at least one additive in the form of an inhibitor that reduces the impact sensitivity, wherein the inhibitor is dimethyl sulphoxide, or wherein the inhibitor is at least one of n-butanol compounds or nitroethane or an ionic liquid, wherein the inhibitor is a phlegmatiser and reduces the impact sensitivity.

The invention discloses a synthesis method of tetrazine high-nitrogen compounds and salts thereof, and belongs to the technical field of organic synthesis.The synthesis method of the tetrazine high-nitrogen compounds comprises the following steps that 3, 6-bis-3, 5-dimethylpyrazole-1, 2, 4, 5-tetrazine and a nucleophilic reagent are mixed and subjected to a heating and stirring reaction, after the reaction is finished, suction filtration, washing and drying are conducted, and the tetrazine high-nitrogen compounds are obtained. The tetrazine high nitrogen compound is obtained. The method comprises the following steps: mixing a tetrazine high-nitrogen compound with a nitrogen-containing reaction ligand in a solvent for reaction, and after the reaction is finished, carrying out solid-liquid separation and drying to obtain the ionic salt of the tetrazine high-nitrogen compound. The obtained compound is good in thermal stability and low in mechanical sensitivity, the specific impulse value of a solid propellant can be increased to a certain degree, the characteristic signal of the propellant can be reduced, and the research and application field of the asymmetric tetrazine energetic compound is further expanded.

The present invention discloses a photocurable flammable polymer and its application. The polymer comprises an energetic prepolymer, a diluent and a photoinitiator; the energetic prepolymer is a mixture of one or two of terminal acrylate-based poly-3-nitrate methyl-3-methyloxetane and terminal acrylate-based polyglycidyl ether nitrate; the polymer component of the present invention has an energetic group nitrate group, the flammable polymer can self-sustain combustion in an oxygen-free environment, and the polymer can be used to prepare flammable components such as flammable ordnance components.

A severing apparatus is used for severing a conduit. The apparatus includes a main body section having an upper portion, a lower portion, and an intermediate portion. A combustible charge is located in the intermediate portion, and an ignition mechanism is coupled to the upper portion for igniting the combustible charge. A nozzle head is located in the lower portion and includes an internal cavity and a nozzle portion having apertures at spaced apart positions for providing passages from the internal cavity to outside of the nozzle head. The ignition mechanism is configured to ignite the combustible charge to create a flame and combustion products and pressure in the internal cavity for moving the nozzle head relative to the lower portion so that the nozzle portion protrudes out of the lower portion for passage of the flame and hot combustion products out of the apertures to sever the conduit.

A severing apparatus is used for severing a conduit. The apparatus includes a main body section having an upper portion, a lower portion, and an intermediate portion. A combustible charge is located in the intermediate portion, and an ignition mechanism is coupled to the upper portion for igniting the combustible charge. A nozzle head is located in the lower portion and includes an internal cavity and a nozzle portion having apertures at spaced apart positions for providing passages from the internal cavity to outside of the nozzle head. The ignition mechanism is configured to ignite the combustible charge to create a flame and combustion products and pressure in the internal cavity for moving the nozzle head relative to the lower portion so that the nozzle portion protrudes out of the lower portion for passage of the flame and hot combustion products out of the apertures to sever the conduit.

The invention belongs to the technical field of nitrocotton processing, and particularly relates to nitrocotton for fireworks and a preparation method of the nitrocotton. In order to overcome the defects that an existing stabilizing agent is toxic and low in safety and environment-friendly index, nontoxic oleamide or acrylamide serves as the stabilizing agent, a desensitizer is not used, nitrocotton, a solvent and the stabilizing agent are added into a kneading machine according to the mass ratio of 100: (70-120): (0.7-1.5) to be plasticized, water is added for granulation after plasticization, and then wet smashing and dehydration are conducted to prepare the nitrocotton for fireworks. The nitrocotton is composed of two kinds of nitrocotton with different nitrogen contents, the nitrogen content of one kind of nitrocotton is 11.5-12.2%, the mass ratio of the other kind of nitrocotton is 40-60%, and the nitrogen content of the other kind of nitrocotton is 13.2-13.4%. The nitrocotton for fireworks prepared by the invention has the same performance as the existing product, and is high in stability and more environment-friendly.

The invention relates to the technical field of explosives, in particular to an energetic binder coated DNTF explosive and a preparation method thereof.The preparation method comprises the following steps that S1, an energetic binder is dissolved in an organic solvent, and an energetic binder solution with the mass percent being 1%-20% is obtained; s2, putting 3, 4-dinitrofurazan furazan (DNTF) powder into water, heating, stirring and dispersing, so as to obtain DNTF turbid liquid; s3, dropwise adding the energetic binder solution prepared in the step S1 into the DNTF suspension prepared in the step S2, stirring, then carrying out vacuumizing treatment, and after the organic solvent is volatilized, sequentially carrying out suction filtration, washing and sieving to obtain DNTF explosive particles; the problem that the energy output of the DNTF explosive is reduced in the existing DNTF explosive packaging technology, so that the further application of the DNTF explosive in the application scene requiring high performance and high safety is limited is solved.

The invention discloses an azotriazole energetic material prepared by coupling a NiS2 / Pt composite catalyst, and a method and a system thereof, and belongs to the technical field of energetic material preparation. According to the method disclosed by the invention, a copper oxide nanowire is used as an anode, CC-coated NiS2 / Pt is used as a cathode, an alkaline solution of 3, 5-diamino-1, 2, 4-triazole is used as a preparation raw material, a dual-electrode coupling reaction is carried out on the basis of an H-type electrolytic bath, and the azotriazole energetic material is produced; according to the method, the defects of a traditional organic preparation method are overcome, the reaction can be carried out at the room temperature, the reaction conditions are simple and controllable, meanwhile, due to the fact that the oxidation reaction has the lower reaction potential compared with OER (1.23 V vs RHE), the cathode hydrogen production tank pressure and energy consumption of a coupling system (HERDATOR) are lower, and the hydrogen production efficiency is improved. The technical problem that industrialization is difficult to achieve due to the fact that an existing preparation method is high in reaction condition requirement is solved.

The invention discloses a preparation process of a mixed ester double-base blank absorption drug containing TG and NG, and relates to the technical field of preparation of mixed ester double-base blank absorption drugs. The preparation process comprises the following steps: synthesizing nitroglycerin NG; preparing cotton pulp containing NC (nitrocellulose) and centralite; adding NG into the cotton pulp to prepare a mixed solution containing NG and NC, and stirring; the method comprises the following steps: synthesizing nitrified triethylene glycol TG, adding TG into a mixed solution containing NG and NC, and stirring; and centrifuging the stirred mixed solution, and removing most of water to obtain the mixed ester double-base blank absorption medicine containing TG and NG. On the basis of a conventional common double-base propellant, new TG is added, the dangerousness of NG and TG is reduced through an absorption process, and meanwhile, the consistency of components of the propellant can be more accurately controlled in the reverse absorption process by analyzing the components of a blank absorption drug.

The invention provides a dinitramide ammonium-based liquid propellant combustion simulation data labeling method and system based on digital twinning, and the method comprises the steps: constructing a labeling correlation map through combing and refining combustion physical rules and multi-batch historical labeling data of a dinitramide ammonium-based liquid propellant in different combustion environments; the method comprises the following steps: comparing new combustion simulation data generated by a digital twin system through iterative simulation with an annotation association map, extracting a covering combustion state description item and multiplexing a corresponding annotation label, synchronously separating a new combustion state description item which is not matched with the annotation association map, performing targeted annotation to obtain a newly added annotation label, and performing annotation on the newly added annotation label to obtain a new combustion state description item; and updating a combustion state description item-labeling label association corresponding record of the labeling association map, performing adaptive calibration on all combustion simulation historical labeling data generated in an early stage, updating original labeling label contents, and synchronously updating a combustion simulation data labeling reference library of the digital twin system. According to the method, the integrating degree of simulation and labeling can be improved.

A tool (1), for example, a tool for use downhole in a tubular oil or gas well, and a method of deploying and operating the tool (1), are disclosed herein. The tool (1) includes a generally cylindrical body (4), which includes a chamber (6). A fuel source (8) is also included. The fuel source (8) is a pressurised fuel and oxidant mixture (9) which is released into the chamber by an injector device through injector nozzles (16). The fuel and oxidant mixture (9) is ignited to form a combustion jet (20). The combustion jet (20) exits the nozzle outlet (28) as directed combustion jets, which perforate the walls of the tubular oil or gas well 30, wherein the walls of the tubular oil or gas well represent a material to be manipulated.