16results about "Pyrophoric compositions" patented technology

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 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 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.

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 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.

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 relates to an infrared interference technology, in particular to a flammable foil for a surface-type infrared decoy, and a method for preparing the flammable foil. In order to solve the problems in the prior art that production raw materials and a production process are extremely hazardous in the process of producing equipment decoys, and are not conducive to environmental protection, and at the same time, the obtained decoy has short combustion time and low combustion temperature, the flammable foil of the present invention can quickly spontaneously ignite in air, and the heat radiation temperature can reach 1300K or more. During manufacturing, a metal foil is coated with an ignition agent and a combustive agent by an adhesive, and then the ignition agent is activated to obtain a flammable foil which is stored in an inert atmosphere glove box for subsequent use.

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.