37results about "Pyrophoric compositions" patented technology

The invention discloses an ignition powder composition capable of preventing mistaken combustion and a preparation method and application thereof.The ignition powder composition capable of preventing mistaken combustion is prepared from, by weight, 30-75 parts of metal fuel particles, 8-35 parts of copper oxide, 5-25 parts of ammonium phosphate and 3-18 parts of coating agent.The application of the ignition powder composition capable of preventing mistaken combustion comprises the following steps that 1, the ignition powder composition capable of preventing mistaken combustion is prepared from, by weight, 30-75 parts of metal fuel particles, 8-35 parts of copper oxide, 5-25 parts of ammonium phosphate and 3-18 parts of coating agent; and at least one of an electric igniter or a chemical activating agent needs to be matched for use. The coated magnesium powder is used as metal fuel particles, and components such as copper oxide and ammonium phosphate are matched with the coated magnesium powder to jointly perform oxidation-reduction reaction; the pyrophoric powder composition can be ignited only by being matched with an electric igniter or a chemical activating agent, mistaken combustion caused by external factors or improper manual operation is avoided, and the pyrophoric powder composition is particularly suitable for occasions with high safety requirements such as industrial high-temperature welding ignition devices, petroleum drilling engineering or firework delayed ignition devices.

The invention relates to a photothermal conversion material and application thereof, and belongs to the technical field of laser ignition. The photothermal conversion material comprises a composite material formed by loading gold particles on titanium carbide nanosheets and fluorinated alkyl bonded on the surface of the composite material. Gold particles are loaded on the titanium carbide nanosheets, the photothermal conversion performance of the titanium carbide nanosheets can be enhanced on the physical level, meanwhile, fluorinated alkyl silane is adopted for modifying the composite material, the photothermal conversion material can generate CFx free radicals under laser irradiation, oxygenolysis of the titanium carbide nanosheets is accelerated through a chemical reaction, and the photothermal conversion performance of the titanium carbide nanosheets is improved. A TiO2 hardened layer generated by the titanium carbide nanosheet under laser irradiation is broken through, the titanium carbide nanosheet is completely oxidized, energy release of the titanium carbide nanosheet is improved to the maximum extent, high-temperature pulses are instantly generated, and when the titanium carbide nanosheet is used for laser ignition, combustion of energetic materials can be rapidly triggered under low laser energy irradiation.

The present invention relates to a process for passivating at least one pyrophoric metal, comprising the step of coating the at least one pyrophoric metal, such as preferably magnesium, with urea. Furthermore, the present invention relates to passivated pyrophoric metal, in particular magnesium, obtainable by the process in the form of pyrophoric metal particles coated with a urea-containing or urea-consisting coating, as well as to the use of passivated magnesium for producing pyrotechnics, coated welding electrodes, refractory products, flux-cored wires, or desulfurizing agents for pig iron desulfurization.

The invention relates to a film effect igniter (1) comprising an electrical connecting lead (6); a glowing wire (4) connected to the electrical connecting lead; and an ignition material charge (3) forming an active mixture which can be ignited by means of the glowing wire (4); wherein the ignition material charge (3) is composed of an ignition material which is free of heavy metals and contains silver azide. Furthermore, a method for manufacturing a film effect igniter is provided.

This invention discloses a safe and efficient unconventional in-situ cryogenic ignition agent and ignition process for oil and gas, belonging to the field of oil and gas development technology. The ignition agent, by mass percentage, includes a coated slow-release oxidant, high-calorific-value fuel, a catalyst, and the balance being additives. The process includes: first, pretreating the reservoir by injecting dispersion system A containing the catalyst; then, injecting dispersion system B containing the coated slow-release oxidant and dispersion system C containing the high-calorific-value fuel into the pretreated reservoir in an alternating or simultaneous manner, ensuring that the coated slow-release oxidant and the high-calorific-value fuel are uniformly distributed and physically isolated within the reservoir; finally, injecting dispersion system D containing an initiator as the trigger source. Through a novel chemical ignition agent system and a reasonable implementation process, rapid, safe, and self-generating ignition under cryogenic reservoir conditions is achieved, thereby realizing cost reduction and efficiency improvement in in-situ conversion and exploitation.

The invention discloses a hydrophobic property and ignition property synergistically enhanced boron / potassium nitrate ignition powder and a preparation method thereof. The hydrophobic property and ignition property synergistically enhanced boron / potassium nitrate ignition powder comprises the following components in parts by weight: 10-50 parts of boron; 50 to 80 parts of potassium nitrate; copper stearate (CuSt2) accounting for 1%-6% of the total weight of the potassium nitrate; the trifluorochlor oethylene-vinylidene fluoride copolymer (F2314) accounts for 1%-6% of the total weight of the potassium nitrate, and boron is amorphous particles. The preparation method comprises the following steps: coating the surfaces of potassium nitrate particles with copper stearate to prepare KNO3 (at) CuSt2, modifying the KNO3 (at) CuSt2 with F2314 to prepare KNO3 (at) CuSt2 (at) F2314, and mixing the KNO3 (at) CuSt2 (at) F2314 and boron according to a certain ratio to prepare the boron / potassium nitrate ignition powder.

The invention discloses a low-energy laser combustion improver and a safe ignition method. The combustion improver comprises the following raw materials in percentage by weight: 1-5wt% of phosphorus-containing ligand, 3-8wt% of sulfur-containing ligand, 1-3wt% of metal nickel salt, 1-5wt% of accelerant and the balance of organic solvent. The invention provides a low-energy laser combustion improver and a safe ignition method, the low-energy laser combustion improver can ignite an object to be ignited through low-energy laser at a certain interval at a lower environment temperature, so that the ignition safety of explosives is improved, and the low-energy laser combustion improver can also be used in activities such as performance, magic and celebration; the combustion improver is simple and easy to prepare, free of tedious procedures and harsh conditions, capable of being prepared in an amplified mode, convenient to industrialize, relatively low in price and suitable for popularization.

The invention relates to the technical field of civil explosives, and discloses a single-component high-precision ignition powder head and a preparation method thereof, and the ignition powder head is composed of the following raw materials in parts by weight: 100 parts of Stefan lead and 5-10 parts of an adhesive. The ignition powder head is obtained by firstly mixing Stefan lead and an adhesive to prepare a product A, then dipping powder to prepare a semi-finished product, and then dipping paint to prepare the ignition powder head. The ignition head prepared by the invention has extremely high ignition precision, breaks through the barrier of the current ignition head, reaches us-level ignition precision, has the minimum range of 60 us, and has extremely high popularization and application values.

The invention relates to a method for passivating a magnesium material, comprising the step of coating the magnesium material with urea, where the magnesium material is magnesium, a magnesium alloy containing at least 50% by weight of magnesium, or a mixture of magnesium and one or more such magnesium alloys, and where the coating is carried out by mixing the magnesium material with urea particles. The invention further relates to a passivated magnesium material, in particular magnesium in the form of particles of a magnesium material, which are coated with a coating containing urea or consisting of urea, which can be obtained by said method, the invention also relates to the use of the passivated magnesium material for producing pyrotechnic, coated welding electrodes, refractory products, cored wires or desulfurizers for the desulfurization of pig iron and / or steel.

A method for making a pyrotechnic composition in accordance with an embodiment of the present technology includes flowing metal powder, polytetrafluoroethylene powder, and binder powder in separate respective feed streams toward an extruder. The binder powder includes adhesive material and polytetrafluoroethylene anticaking material coating the adhesive material. The method further includes interspersing the metal powder, the binder powder, and the fluoropolymer powder to form a mixture. This mixture is then subjected to an extrusion process during which the anticaking material coating the adhesive material is disrupted. This releases the adhesive material to bind together the metal powder and the polytetrafluoroethylene powder in the extrudate. The powder mixture includes no solvent at any time between being formed and being extruded, yet the extrudate is well-mixed and cohesive.

The invention relates to a carbon-carbon double bond connected cyanine dye conjugated organic framework material as well as a preparation method and application thereof, and belongs to the technical field of conjugated polymer materials. The carbon-carbon double bond connected cyanine dye conjugated organic framework material prepared by introducing a cyanine dye into a conjugated organic framework material has excellent optical properties, the absorption spectrum can be expanded to 2000 nm, the material has excellent photo-thermal conversion properties under near-infrared laser irradiation, the ultrahigh temperature of 450 DEG C can be reached, and the stability is good; the preparation method is simple in process and low in cost; and carbon-carbon double bonds can be broken under the action of reductive amine and are degraded into monomers, so that raw materials are recycled.

This invention discloses an energy control method for high-energy electrohydraulic detonation, belonging to the field of pulse power technology. It includes: control of the electrical and chemical energy of a metal wire, utilizing the high amplitude component of a composite pulse power to rapidly deposit electrical energy into the metal wire and completely release its chemical energy; control of plasma channel deposition energy, adjusting the channel deposition energy and external radiated heat through the long pulse width component of the composite pulse power, enabling the metal powder to react with the liquid medium and release energy; control of metal powder release energy, adjusting the reaction rate between the metal powder and the liquid medium to achieve self-sustaining reaction and improve the energy release efficiency of the metal powder; and control of shock wave energy, adjusting the composite pulse power, metal wire size, and metal powder parameters to improve the conversion efficiency of the deposited energy into shock wave energy, meeting application requirements. This invention achieves precise energy control during electrohydraulic detonation through the matching of multiple stages.

The invention discloses a safe and efficient unconventional oil gas in-situ low-temperature ignition agent and an ignition process, and belongs to the technical field of oil gas development, and the ignition agent comprises, by mass, a coated slow-release oxidant, a high-calorific-value fuel, a catalyst, and the balance an auxiliary agent. The process comprises the following steps: firstly, injecting a dispersion system A containing a catalyst to pre-treat a reservoir; then, injecting the B dispersion system containing the coated slow-release oxidizing agent and the C dispersion system containing the high-calorific-value fuel into the pretreated reservoir in an alternate injection or synchronous injection mode, so that the coated slow-release oxidizing agent and the high-calorific-value fuel are uniformly distributed in the reservoir and are physically isolated; and finally, injecting a D dispersion system containing an initiator as a trigger source. Through a novel chemical ignition agent system and a reasonable implementation process, rapid, safe and self-heating ignition under a low-temperature reservoir condition is realized, so that cost reduction and benefit improvement of in-situ conversion mining are realized.

The invention relates to an active ingredient for a pyrotechnic decoy target that burns at a wind speed of more than 100 m / s and emits spectral infrared radiation, a pyrotechnic decoy target containing this active ingredient, and a use of the active ingredient, wherein the active ingredient comprises an organic first fuel and an oxidizing agent, wherein the first fuel is an aliphatic or heterocyclic compound or an aliphatic or heterocyclic polymer, wherein in the case of the aliphatic compound or the aliphatic polymer there are at most 5 carbon atoms in a row and in the case of the heterocyclic compound or the heterocyclic polymer there are at most 5 carbon atoms directly adjacent in the heterocycle or in the heterocycles, and the active ingredient further comprises a salt of an aliphatic carboxylic acid as a second fuel.

This invention belongs to the field of solid propellant ignition technology, specifically relating to a conductive ignition paint, its preparation method, and its application. The invention involves mixing carbon nanotubes and high-energy fuel using a microfluidic device to form a suspension, followed by a microwave-assisted complexation reaction with a metal complexing agent. This allows the carbon nanotubes and high-energy fuel to form a stable core-shell structure through metal ion bridging, synthesizing a carbon nanotube composite coated with fuel. This composite is then mixed with a nanofiber dispersion, forming a hierarchical porous gel system with a three-dimensional interpenetrating network. Finally, a nano-oxidant is added and ultrasonically dispersed uniformly within the cavities of the network structure. The conductive ignition paint is then obtained through a rotary evaporation process. This invention's conductive ignition paint possesses a unique three-dimensional interpenetrating network structure and hierarchical porous characteristics, maintaining high energy density while reducing sensitivity, ensuring stable energy transfer and controllable release, and significantly improving the reliability and safety of ignition.

Disclosed are an ignition powder, a preparation method therefor and a use thereof, and an airbag gas generator, which belong to the technical field of ignition powders. The raw materials of the ignition powder include the following components in percentages by mass: potassium perchlorate. 30%˜50%; basic copper nitrate: 5%˜20%; a fuel: 15%˜60%; a metal oxide: 1%˜25%; and a metal powder: 1%˜25%, wherein the metal powder is at least one of a titanium powder, a magnesium powder, a copper powder, an iron powder, a zirconium powder, a hafnium powder, a tungsten powder or a silicon powder.

The present disclosure relates to pyrophoric pellets that break apart into individual particulates or agglomerates when exposed to air and emit infrared radiation. The pyrophoric pellets include: (a) about 35 to about 95 wt. % of pyrophoric particles; (b) about 0.05 to about 30 wt. % of one or more thermally expandable particles; (c) about 1 to about 40 wt. % of one or more additives that modify IR signature; and (d) optionally, one or more additives that produce smoke at a temperature of 150° C. or greater. The pyrophoric pellets are particularly useful as countermeasures to protect against incoming missiles.

The present invention relates to a method for passivating a magnesium material, comprising the step of coating the magnesium material with urea, wherein the magnesium material is magnesium, a magnesium alloy containing at least 50 wt.% magnesium or a mixture of magnesium and one or more such magnesium alloys, and wherein the magnesium material is coated by mixing the magnesium material with urea particles. In addition, the present invention relates to passivated magnesium material, in particular magnesium, obtainable by the method, in the form of particles of magnesium material, which is coated with a coating containing urea or consisting of urea, and to the use of passivated magnesium material for producing pyrotechnics, sheathed welding electrodes, refractory products, cored wires or desulphurisation agents for pig iron and / or steel desulphurisation.

The invention belongs to the technical field of energetic materials, and discloses a core-shell structure aluminum-based microwave energetic material and a preparation method and application thereof.The preparation method comprises the steps that in order to construct an interface layer on the surface of aluminum powder, the aluminum powder is added into a silane coupling agent solution, a cyclodextrin solution, a butyl titanate solution and a perfluorododecyl mercaptan / dopamine hydrochloride solution, and four kinds of suspension liquid A are formed; adding the suspension B containing the bimetallic composite oxide into the suspension A, and stirring to obtain four suspensions C; and filtering, washing and drying the suspension C to obtain the aluminum-based microwave energetic material with the core-shell structure. According to the invention, interface chemical bonds or electrostatic interaction is constructed between aluminum and AB2O4 by using the interface layer, so that oxidation of aluminum is effectively prevented, interface polarization is enhanced at the same time, and a core / shell structure further shortens the mass and heat transfer distance of a reaction between fuel and potassium oxide, so that the microwave ignition delay time is remarkably shortened, and the microwave ignition efficiency is improved. Efficient microwave energy coupling and controllable combustion performance are achieved, and excellent microwave response characteristics are shown.

Disclosed is an ignition formulation for use as an aerial ignition incendiary. The ignition formulation comprises an incendiary material and an ignition fluid. The ignition fluid includes an alcohol-based reactant capable of reacting exothermically with the incendiary material to an extent sufficient to generate a flame. The ignition fluid also includes an alcohol-based suppressant capable of delaying a time needed to generate the flame upon contact of the alcohol-based reactant with the incendiary material compared to a time required to generate the flame in an absence of the alcohol-based suppressant.

Existing water ignition fuel is unstable to heat and not resistant to storage, and potassium ferrate which is a relatively stable oxidizing agent is introduced to prepare the water ignition fuel which is thermally stable (free of obvious decomposition at 200 DEG C) and is mainly applied to a simple fire ignition scene.

The invention relates to an ignition powder automatic re-weight device and a process method, through the design of the automatic re-weight device, automatic stirring and weighing operation of powder is realized, and direct contact of people and powder during manual operation is effectively avoided, so that potential safety hazards are avoided, and the health of operators is protected. The device adopts two sets of independent vertical driving units to drive the stirring mechanism and the medicine basin to ascend and descend, medicine powder is stirred through a paddle structure, and the mobility of the medicine powder and the volatilization uniformity of a solvent are improved. And meanwhile, the re-weight precision is improved in combination with a re-weight control process parameter table. According to the automatic re-weight device and the process method, the production efficiency is improved, the labor intensity of workers is reduced, and the automatic re-weight device and the process method can be widely applied to re-weight operation of various initiating explosive device medicament manufacturing and have remarkable technical effects and practical value.

The application discloses a high-sensitivity moisture-proof ignition powder composition and a preparation method thereof. The high-sensitivity moisture-proof ignition powder composition comprises a pyrotechnic agent base, a high-thermal-conductivity inorganic powder and a high-molecular-weight fluorine-containing polymer solution. The high-molecular-weight fluorine-containing polymer solution is used for adsorbing and bonding the pyrotechnic agent base and the high-thermal-conductivity inorganic powder. The high-molecular-weight fluorine-containing polymer is used as an adhesive, the polymer consumption is reduced, and the moisture-proof performance is provided. Meanwhile, the high-thermal-conductivity inorganic solid particles are introduced into the pyrotechnic agent base, the volume shrinkage during drying is reduced, the thermal conductivity is improved, and the sensitivity of the ignition agent is increased.

The invention discloses a novel ionic self-assembly energetic compound ABX3, a synthesis method thereof and application of the novel ionic self-assembly energetic compound ABX3 in a heat-resistant energetic material. The invention provides a novel ionic self-assembled energetic compound with good thermal stability and excellent detonation performance. According to the synthesis method of the energetic compound, the 1-fluoro-4-methyl-1, 4-diazabicyclo [2.2. 2] octane tetrafluoroborate, the perchloric acid and the corresponding halide or the perhalide are directly added into the deionized water to be synthesized through a one-pot method, the raw materials are cheap and easy to obtain, the reaction route is simple, and the reaction conditions are mild. The sodium-containing and potassium-containing compounds can be used for heat-resistant gunpowder, the rubidium-containing and cesium-containing compounds can be used for heat-resistant primary explosives, and the hydrazine-containing and ammonium-containing compounds can be used for heat-resistant explosives.

The present invention is a micro-scale continuous flow preparation method for ultra-fine boron / potassium nitrate ignition powder. It includes the following steps: (1) potassium nitrate and a binder are respectively prepared into solutions, and boron powder is dissolved in one phase of the solution to form a boron suspension system B-X1, (2) equipment assembly, the boron suspension system B-X1 and another solution phase X2 are placed in a fluid drive unit, the molding chamber is vacuumed, and the inlet of the atomizer is passed through an inert gas of 0.1-6.0kpa, and the temperature in the molding chamber is set to 80°C-200°C; (3) the boron suspension system B-X1 and another phase solution X2 are driven to flow into a micro-mixing unit, and the boron potassium nitrate suspension system generated by mixing in the micro-mixing unit flows into the atomizer and forms atomized droplets under the action of the inert gas, and the atomized droplets enter the molding chamber and are dried and then molded to obtain ultra-fine boron / potassium nitrate ignition powder. The present invention overcomes the problem that the output is not easy to amplify faced by the current micro-chemical process, the whole process is continuous, there is no three wastes, and it is easy to realize the green and controllable macro-preparation of boron / potassium nitrate ignition powder.

The invention relates to the field of alloy production, and discloses an alloy preparation method which comprises the following steps: S1, mixing a first material and a second material according to a preset preparation ratio to obtain an ignition agent; s2, the reaction materials are put into a smelting furnace, and an ignition agent is flatly laid on a frustum formed by the reaction materials; s3, igniting an ignition agent for smelting; and S4, after the smelting reaction is completed, cooling to obtain an alloy product. According to the scheme, the titanium powder which is nontoxic, harmless and relatively low in price is adopted as an ignition agent material, the ignition operation technology is optimized, operation is easy and convenient, cost is low, efficiency is high, the stability and success rate of the ignition process are improved, production cost and safety risks are effectively reduced, and the method can be widely applied to preparation of high-end vanadium alloy and titanium alloy and has good application prospects. The method has important industrial application value.

A multicolor strobing pyrotechnic flare including a plurality of alternating pyrotechnic layers. The plurality of alternating pyrotechnic layers includes n pyrotechnic layers and the n pyrotechnic layers include m different pyrotechnic layer types, n is 2 to 2,000 and m is 2 to 2,000. The n pyrotechnic layers include a first pyrotechnic layer and a second pyrotechnic layer and the first pyrotechnic layer includes a first pyrotechnic compound and the second pyrotechnic layer includes a second pyrotechnic compound. Burning of the first pyrotechnic compound emits a first color and burning of the second pyrotechnic compound emits a second color and the first color and the second color are different.