257results about "Pressure gas generation" patented technology

The invention relates to the technical field of energetic materials, in particular to a laser response type high-entropy alloy-based initiating explosive material and a preparation method thereof. The initiating explosive material is mainly formed by uniformly loading a heat-sensitive high-energy compound (such as lead stilbeneate or hexa (4-amino-3, 5-dinitropyrazole) copper) on high-entropy alloy nanoparticles containing five or more metal elements, wherein the heat-sensitive high-energy compound is such as lead stilbeneate or hexa (4-amino-3, 5-dinitropyrazole) copper. The preparation method comprises the following steps: mixing acetylacetone metal salt, a surfactant and a reducing agent in an organic solvent, and stirring and reacting at 180-220 DEG C to prepare high-entropy alloy nanoparticles; the nano particles and a high-energy compound are co-dispersed in a mixed solvent containing a dispersing agent, ultrasonic treatment is carried out to form suspension liquid, and freeze drying is carried out to obtain the nano particles. The method is characterized in that the excellent photo-thermal conversion performance of the high-entropy alloy is utilized, under low laser energy irradiation, a high-energy compound can be effectively excited, and stable detonation of secondary charge CL-20 is successfully achieved. According to the invention, the problems of high response threshold and low output energy of the existing laser initiating explosive material are solved.

Emulsion explosives with gas bubbles that are resistant to in-borehole migration or coalescence are disclosed herein. Such emulsions can be sensitized by mechanically-introducing gas bubbles into the emulsion. Resistance to gas bubble migration and coalescence can be achieved by homogenization, without the need for bubble stabilization agents.

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 invention belongs to the technical field of solid propellants, and particularly relates to a propellant containing active metal fuel and a preparation method of the propellant. 3.0-4.0% of a plasticizer; 0.3-0.4% of a curing agent; 0.1%-2.0% of a combustion rate regulator; 0.01%-0.5% of a bonding agent; 15-19% of an active metal fuel; 10-18% of a nitramine explosive; the metal fuel is an aluminum-gallium metal alloy, and the aluminum-gallium metal alloy is an aluminum-gallium metal alloy of which the outer layer is coated with an aluminum film. The propellant provided by the invention has the advantage of high combustion efficiency, and can meet the requirement of a solid rocket engine on the high energy performance of the propellant.

The invention relates to the field of preparation of modified double-base propellants, in particular to a preparation process of a modified double-base propellant absorbing drug with uniformly dispersed solid components. The preparation process comprises the following steps: putting the dispersing agent into an absorption kettle according to a feeding sequence, then putting a particle suspension prepared from the white material, the RDX, the aluminum powder and the catalyst into the absorption kettle, and heating, stirring and absorbing in a water medium to obtain absorption slurry. On the basis of a traditional double-base propellant stirring absorption process, a dispersing agent is added to help absorption, the sedimentation problem of a catalyst and RDX in a propellant formula is effectively solved through the effects of electrostatic repulsion and steric hindrance, and an absorption drug with uniformly dispersed solid components is obtained.

The invention discloses application of ferrocenyl conjugated microporous polymers Fc-CMPs in a composite solid propellant and the composite solid propellant, the ferrocenyl conjugated microporous polymers Fc-CMPs are porous organic polymers which take ferrocenyl groups as conjugated functional units and are connected through covalent acetylenic bonds, and the ferrocenyl conjugated microporous polymers Fc-CMPs have excellent thermal stability and permanent porosity, and can be used for preparing the composite solid propellant. The material is solid powder, is insoluble in a traditional organic solvent and does not migrate, and a ferrocene unit serves as a constituent part of a polymer framework and an oxidation-reduction active site and is dispersed in a two-dimensional conjugated network structure of a composite solid propellant. When being used as a burning rate catalyst to be applied to AP decomposition, the ferrocene burning rate catalyst can obviously reduce the high-temperature decomposition peak temperature of AP, and solves the migration problem of a traditional ferrocene burning rate catalyst in a composite solid propellant system. The Fc-CMPs are applied to an AP decomposition catalysis scene for the first time, and a new direction is provided for development of a composite solid propellant burning rate catalyst.

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.

The invention provides a lead salt modified 5-aminotetrazolyl gas generating agent with low combustion temperature and high combustion rate and a preparation method thereof, the gas generating agent comprises 5-aminotetrazole, strontium nitrate and lead salt, and the mass ratio of the lead salt is 5-10%. According to the invention, the 5-aminotetrazolyl gas generating agent is modified, so that the temperature of the gas generating agent can be reduced, the burning speed can be improved, and the applicability of the gas generating agent as a solid propelling type fire extinguishing device is enhanced.

Provided is a gas-generating agent composition containing components (a) to (c) below, wherein a combustion temperature calculated based on a composition containing the components (a) to (c) below is 1680 K or higher: (a) guanidine nitrate, (b) basic copper nitrate, and (c) melamine cyanurate.

The invention discloses an electrolytic preheating-electrolytic ignition method for a three-electrode hydroxylamine nitrate liquid propellant, and belongs to the field of liquid rocket engines and electrochemistry. Three electrolysis electrodes are arranged in the electrolysis chamber and comprise two positive electrodes and one negative electrode, so that two groups of electrolysis electrode pairs are formed. The method comprises the following steps: injecting a nitric acid hydroxylamine-based liquid propellant into an electrolysis chamber, and electrifying a group of electrolysis electrodes to start electrolysis preheating; after the preset switching time is up, closing the current working electrolysis electrode pair, and switching to another group of non-working electrolysis electrodes to continue electrolysis; and low-voltage and rapid electrolytic ignition is realized. According to the three-electrode electrolysis structure, the time for ignition and reaction to reach the highest temperature can be shortened, and the system response speed is increased; the preheating and ignition voltage can be changed, and the large voltage adjusting and optimizing space is achieved; meanwhile, the electrolytic ignition current is relatively stable, and the instantaneous power consumption is small; and electrolysis power consumption can be saved, electrolysis electrode loss is reduced, and reuse of the electrode is facilitated.

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

The present invention relates to the technical field of solid propellants, and specifically discloses an organosilane bonding agent, a preparation method thereof, and an application thereof in solid propellants. The organosilane bonding agent is prepared by reacting N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane with acrylonitrile, then adding acrylonitrile to react and performing reduced pressure distillation to remove unreacted small molecule compounds, thereby preparing the organosilane bonding agent. The siloxane in the organosilane bonding agent avoids highly active primary and secondary amine groups, while introducing a cyano group with an inductive effect, which can improve stress concentration under propellant tensile conditions. In addition, multiple hydroxyl groups are introduced into the molecule to participate in the curing reaction. When used in a propellant, it can increase the crosslinking density of the propellant, thereby improving the mechanical properties of the propellant.

The invention relates to a composite solid propellant comprising: - a crosslinked polyurethane binder, which is the reaction product of a polyol polymer and a polyisocyanate crosslinking agent, in the presence of a crosslinking catalyst; - ammonium perchlorate; - optionally aluminum; - optionally a ballistic catalyst; - at least one additive comprising a functionalized organic compound comprising 30 to 50 carbon atoms. Figure for the abstract: Fig. 1.

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.

The invention relates to the technical field of gas production materials, and discloses preparation and application of a high-nitrogen energetic gas production material, triazole has high-energy and multi-nitrogen characteristics, nitryl compounds have high energy, and the combination of triazole and nitryl compounds enables the gas production material to have the characteristics of large gas production rate, low-temperature combustion, less harmful gas and the like; the molecular structure contains a large number of N-N, C-N and C = N bonds and has high enthalpy of formation, meanwhile, the content of C and H in the molecule is low, the density of the energetic material can be improved, the electronegativity of nitrogen and oxygen atoms in the structure is high, and the energetic material is a painful energetic material and has high safety in the using process; compared with similar gas production materials, the prepared gas production material has the advantages that the gas production rate is greatly increased, the amount of solid residues is greatly reduced, the added adhesive has no corrosivity, the prepared gas production material is good in fluidity, the external additive can play a role in slagging, and the residues are not prone to being sprayed out.

The invention belongs to the technical field of ammonium perchlorate modification, and particularly relates to a low-sensitivity ammonium perchlorate composite material and a preparation method thereof. The preparation method of the composite material comprises the following steps: (1) mixing diethanol amine and an insensitive material to obtain a coating material; (2) adding a part of ammonium perchlorate into a stirrer according to a sandwich type feeding method, spreading the bottom of the stirrer, adding a coating material, finally adding the rest ammonium perchlorate, lifting a stirrer material cylinder, and starting a stirring reaction when the bottom of a stirring paddle is about to touch the material; and (3) after the reaction is finished, stirring and cooling the reaction system to obtain the ammonium perchlorate composite material with low friction sensitivity and impact sensitivity. The process provided by the invention is suitable for preparing low-sensitivity ammonium perchlorate with various particle sizes, has the advantages of simple process flow, good reproducibility, easiness in amplification and almost no pollution to the environment, and does not influence the performance of ammonium perchlorate while reducing the sensitivity of ammonium perchlorate.

The invention discloses a low-combustion-temperature oxygen-deficient high-pressure-index rich-combustion fuel gas generating agent which comprises the following components in percentage by mass: 50-70% of an oxidizing agent; 12%-30% of hydrocarbon solid fuel; 0-2.5% of a combustion rate regulator; 9%-17% of an adhesive; 0-3.5% of a plasticizer; and 0.7-1.3% of a curing agent. The invention also discloses a preparation method of the fuel gas generating agent. According to the low-combustion-temperature oxygen-poor type high-pressure-index rich-combustion gas generating agent, the gas temperature ranges from 1100 K to 1600 K, the pressure index ranges from 0.5 to 0.8, the oxygen coefficient ranges from 0.3 to 0.45, the total molar ratio of rich-combustion gas ranges from 60% to 84.8%, rich-combustion gas is provided for a rotary detonation engine, and a power source is provided for a solid attitude and orbit control engine.

This invention provides a three-layer composite fuel consisting of boron-supported elemental metal and metal oxide, and its preparation method. The middle layer is an elemental Mo layer, and the surface layer is a dense NbOx or TiO2 thin film oxide layer. The NbOx or TiO2 thin film oxide layer can completely cover the elemental Mo layer. This invention uses atomic layer deposition (ALD) to deposit elemental Mo on the surface of boron particles to prepare a B@Mo composite material. To prevent oxidation of the surface Mo, an in-situ preparation method is used to deposit a dense NbOx or TiO2 thin film of a certain thickness on the Mo film surface via ALD. This NbOx and TiO2 film effectively isolates oxygen from the air, effectively preventing the oxidation of the Mo film. In the composite fuel, elemental Mo not only improves the combustion efficiency of boron particles but also effectively increases the heat release of the composite fuel. The NbOx and TiO2 films not only isolate oxygen but also have a catalytic effect, significantly improving the combustion performance of the composite fuel.

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 application discloses a synthesis method of aza-cyclic modified hydroxyalkyl diethanolamine borate linking agent, which comprises the following steps: (1) adding hydroxyalkyl diethanolamine and boric acid into a three-neck flask provided with a stirrer, a thermometer and a vacuum distillation device, and stirring and heating to react until no water is generated; (2) adding an aza-cyclic compound into the reaction system obtained in the step (1), increasing the reaction temperature, and removing water generated in the reaction by vacuum distillation when no water vapor is generated, so as to obtain a target product. The borate linking agent obtained by the synthesis method has good hydrolysis resistance, and when the borate linking agent is used in a hydroxyl-terminated solid propellant, the mechanical properties of the hydroxyl-terminated solid propellant can be effectively improved.

The invention relates to the technical field of energetic materials, in particular to nickel fluoride catalyzed ammonium perchlorate / aluminum composite fuel and a preparation method and application thereof. The ammonium perchlorate / aluminum composite fuel consists of the following components in percentage by mass: 50-70% of ammonium perchlorate, 0-10% of nickel fluoride and the balance of aluminum powder. Due to the addition of NiF2, high and low decomposition peaks of AP are combined into a violent exothermic peak, and the temperature of the high-temperature decomposition peak is reduced by about 30 DEG C, which means that the burning rate of the propellant can be greatly improved; the heat effect of the fluorination reaction (55.98 kJ. G <-1 >) of aluminum is far higher than the heat effect of the oxidation reaction (31.05 kJ. G <-1 >) of aluminum, so that the explosion heat is improved by about 10% while the reaction path is optimized. Besides, the anhydrous NiF2 used in the formula is stable in physical and chemical properties and does not absorb moisture and deliquesce, the problem of long-term storage of common fluorides such as CuF2 and FeF3 is solved, and the product reliability is extremely high.

The invention discloses a composite propellant containing a high-nitrogen ferrocene derivative and a preparation method of the composite propellant. The composite propellant is prepared from the following components: 14.05% of hydroxyl-terminated polybutadiene (HTPB), 7.03% of diisooctyl sebacate (DOS), 0.92% of 2, 4-toluene diisocyanate (TDI), 1% of the high-nitrogen ferrocene derivative, 59% of ammonium perchlorate (AP) and 18.00% of aluminum powder (Al). N, N-dimethylaminomethylferrocene in the three high-nitrogen ferrocene derivatives has the effects of improving the burning rate of the composite propellant and reducing the pressure index as the ferrocene derivative, nitrate, picric acid, 3-nitro-1, 2, 4-triazole-5-ketone and the like are rich in C, H, O and N elements, and are similar to oxidizing agents such as typical components ammonium nitrate, HMD and the like in the composite propellant; the fuel can be decomposed to provide energy for propellant combustion; the propellant has a low combustion rate pressure index in a pressure range of 1-10 MPa, and has more excellent combustion stability.

The invention provides a starting mix preparation system. The starting mix preparation system comprises a gas driving mechanism, a material quantifying mechanism, a mixing mechanism, an extrusion pelletizing device and a drying mechanism. The gas driving mechanism provides gas for the material quantifying mechanism and the medicine mixing mechanism, and the gas serves as gas driving force for driving materials to move. The material quantifying mechanism comprises a material storage device and a weighing device, the gas driving mechanism conveys single materials in the material storage device to the weighing device through gas driving force, and the weighing device measures and weighs the single materials according to a preset proportion and conveys the single materials to the medicine mixing mechanism. The explosive mixing mechanism is connected with the extrusion pelletizing device, and is used for mixing all the single materials to form initial starting mix and conveying the initial starting mix to the extrusion pelletizing device. And the extrusion pelletizing device is connected with the drying mechanism, extrudes the initial starting mix according to the preset size to form the starting mix with the target size, and conveys the starting mix to the drying mechanism. The drying mechanism is used for drying the starting mix with the target size to form the target starting mix.

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 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.

There are 111 active volcanoes in Japan, and as many as 50 of them are in a 24-hour monitoring system for disaster prevention. To solve the problem that there are few observation records of eruption of a volcano, it is still difficult to predict the eruption, only software countermeasures are basically examined, and hardware countermeasures are not sufficiently examined. It is considered that some hardware measures, if not perfect, should be taken in order to realize the SDGs11 "Keep living". The present invention is one of the hardware measures, and in particular, when a lava flows erupted due to a volcanic eruption or the like may threaten human life, a house, or a colony, an explosive technology that functions quickly and effectively is applied. To provide a gas generating agent composition and a method for controlling the lava flows of the gas generating agent composition, capable of timely and directly controlling the lava flows by suppressing the flow velocity and changing the flow direction.SOLUTION: The present invention relates to a gas generating composition and a method for controlling the lava flows thereof, the gas generating composition having the functions of reducing the flow velocity and controlling the flow direction by the force of a large amount of gas generated by receiving the heat energy of an lava flows, cooling the lava flows tip by the contact of the generated gas or ejected matter with the lava flows tip, and controlling the lava flows by the contact, melting, and chemical reactions of the generated ejected matter or generated residue on the electrode tip.SELECTED DRAWING: None

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 ferrocenyl diamine monomer, a polyimide and a preparation method and application thereof, the ferrocenyl diamine monomer is prepared by reacting a ferrocene carbonyl compound with aniline, so as to introduce a ferrocene structural unit into the diamine monomer, and form a novel ferrocenyl diamine monomer for preparing the polyimide; the ferrocenyl diamine monomer is polymerized with a tetracarboxylic dianhydride and is subjected to an imidization reaction to prepare the polyimide, and the polyimide is used as a burning rate catalyst; the polyimide can not only effectively ensure the ferrocene content, has good thermal stability, greatly reduce the high-temperature decomposition temperature of an oxidant, has a smaller influence on the low-temperature decomposition temperature, and can significantly reduce the migration rate, effectively improve the performance of the ferrocene polymer burning rate catalyst, and is beneficial to the use safety.

A method of treating a subterranean formation by contacting the formation with the following (a) ammonium bicarbonate; (b) an oxidizing agent selected from a perchlorate or a nitrite or combinations thereof; and (c) an acid (AA).