153 results about "Energetic material" patented technology

In a rocket motor in which burn rate enhancement (BRE) wires are used to accelerate the burn rate of the solid propellent, embedded charge assemblies (ECAs) are configured as support structures for the BRE wires. Each ECA includes an energetic material that is configured to burn along with the solid propellent to produce thrust and, upon detonation, to break up the solid propellent to terminate thrust. The detonation may also be initiated as a part of process to prevent a higher-order reaction, such as in reaction to heating from a fire or other cause. By being located inside the casing, the energetic material and ECAs do not adversely affect aerodynamics of the flight vehicle of which the rocket motor is a part, such as a missile.

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.

The invention is directed to a method for the preparation of an energetic material product such as a propellant or explosive charge or grain. The method includes additive manufacturing with co-extrusion of at least two materials to form a multi-layered filament and layer-by-layer deposition of the multi-layered filament. The multi-layered filament has a first material layer and a second material layer and at least one layer includes an energetic material. In another aspect, the invention is directed to an apparatus for use in this method, the apparatus comprising a co-extrusion nozzle.

The present invention relates to a range extension device, particularly to a reversible range extension device, especially reversible base bleed device.There is provided a reversible range extension device, capable in use, of being reversibly engaged to a body of an artillery shell, said range extension device comprising at least one energetic material, and an igniter, wherein the range extension device comprises a first end with an aperture, and second closed end, wherein the range extension device, in use, is selectively arranged to be in an active orientation or inert orientation, wherein in the active orientation the range extension device is arranged such that the aperture faces rearwardly away from the shell to allow the range extension device to function, and in the inert orientation the range extension device is arranged such that the aperture faces inwardly towards the shell.

Heavy inert gas insulation layer(s) are provided for containers configured to contain components that include an energetic material. The heavy inert gas insulation layer delays desensitization or inhibits premature reaction of the energetic material due to high external temperatures. The layers may be formed in hollow walls of the container itself or as inserts that are attached to the container. An inert gas fills a sealed void space in the walls or the insert. The inert gas has a density of at least 1.5 Kg / m3 and a thermal conductivity (Tcond_gas) of no greater than two-thirds of a thermal conductivity of air (Tcond_air) to form the heavy inert gas insulation layer. The inert gas may be Argon, Krypton, Xenon or a synthetic gas and is suitably held at a pressure of 760 Torr (1 atmosphere) or greater at sea level.

There is provided a reversible range extension device, capable in use, of being reversibly engaged to a body of an artillery shell, said range extension device comprising at least one energetic material, and an igniter, wherein the range extension device comprises a first end with an aperture, and second closed end, wherein the range extension device, in use, is selectively arranged to be in an active orientation or inert orientation, wherein in the active orientation the range extension device is arranged such that the aperture faces rearwardly away from the shell to allow the range extension device to function, and in the inert orientation the range extension device is arranged such that the aperture faces inwardly towards the shell.

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.

Igniter assemblies for use with setting tools are disclosed. The igniter assemblies have an electronic heating element disposed adjacent to an energetic material within a setting tool. In some embodiments, the electronic heating element is a resistor or a PCB mounted resistor. Electrical connections are attached to the heating element to provide electrical current to activate the heating element. In some instances, the electrical heating element is disposed onto an insulator cap that is coupled to a pressure block attached to the setting tool, and in some instances the electronic heating element is attached to a non-explosive portion and the energetic material is disposed within an explosive portion. When the non-explosive portion and the explosive portion are assembled, the electronic heating element is adjacent to the energetic material. Other assemblies are described.

According to the bag-pulling centrifugal machine for the energetic materials, the drum is rotationally installed in the barrel body, the through hole is formed in the drum, the feeding pipe is installed at the top of the barrel body, and particularly, the discharging opening of the feeding pipe faces the inner wall of the drum, so that the energetic materials are not prone to falling off in the input process of the energetic materials due to the structural design. Materials are directly sprayed out from the pipe opening of the feeding pipe to impact the inner side of the pull bag, after spin-drying, cleaning and re-spin-drying, the materials penetrate through the opening from the gap between the supports to be discharged out of the rotary drum, due to the fact that the diameter of the feeding pipe is not changed, energetic materials in the feeding pipe cannot be extruded in the feeding process, the explosion risk is reduced, and the production efficiency is improved. The problem that in the prior art, the explosion risk is too high when a bag-pulling centrifugal machine treats energetic materials is solved.

This invention provides an equivalent substitute, its preparation method, and its application for testing the mechanical properties of RDX-based non-aluminum-containing press-loaded explosives under temperature load. The equivalent substitute is prepared by replacing the energetic material RDX in the RDX-based non-aluminum-containing press-loaded explosive formulation with the non-energetic material ammonium sulfate. The equivalent substitute is used to replace the actual explosive for testing its mechanical properties under temperature load. The equivalent substitute, by mass percentage, comprises the following raw material components: 95.5%–96.5% ammonium sulfate, 2%–3% polyvinyl acetate, and 0.5%–1.5% stearic acid, with the total mass percentage of the above components being 100%. The mechanical properties of the molded explosive charge made with the equivalent substitute provided by this invention, such as compressive strength and tensile strength (compressive strength of 2.9-27.3 MPa and tensile strength of 1.1-5.9 MPa at -55 to 70°C), are basically consistent with those of real explosives under different temperature loads. This can truly reflect the changes in the mechanical properties of the actual explosive charge during environmental and aging tests, and can provide data support for the mechanical failure assessment of explosives.

The utility model provides a destroying device for energetic materials, which relates to the field of solid waste treatment and comprises an incineration device, a destroying device and a destroying device. The continuous feeding system extends into the incineration chamber and is used for conveying the energetic material into the incineration chamber; the sensitivity-reducing liquid sealing device comprises a sensitivity-reducing cavity used for containing sensitivity-reducing liquid, and the energetic material and at least part of the continuous feeding system are immersed in the sensitivity-reducing liquid. The destroying device for the energetic material can effectively reduce the risk of accidental burning and explosion of the energetic material in the conveying process, and improves the safety in the destroying process.

A functionally-graded regolith-based energetic fuel and methods for powering heating systems to help humans and equipment operate in harsh lunar conditions are disclosed. A muti-functionally graded material includes energetic particles comprising a metallic fuel and a regolith-based oxidizer. The energetic particles and the regolith-based oxidizer are mixed to form an energetic material. A regolith-based combustible material is disclosed comprising: micro-magnesium in 20%, 30% or 40% w / w; and a regolith-based oxidizer, wherein the material is ball milled for up to 5 hours.

The invention 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 provides an energetic composite material with a micro combustion chamber structure and a preparation method thereof, and the method comprises the following steps: step 1, preparing a composite combustion catalyst: taking a two-dimensional nanosheet material as a carrier, and realizing uniform loading of a nano catalyst through an interface engineering method to obtain the composite combustion catalyst; 2, constructing a three-dimensional porous network structure: constructing the composite combustion catalyst obtained in the step 1 into a porous network combustion catalyst with the three-dimensional porous network structure; and 3, preparing the energetic composite material: adding an oxidizing agent, energetic explosive powder and metal powder into an adhesive, stirring to form energetic material slurry, adding the energetic material slurry into the porous network combustion catalyst obtained in the step 2, and carrying out vacuum impregnation and curing for 12-48 hours to obtain the energetic composite material with the micro combustion chamber structure. The porous network combustion catalyst is preformed, so that the dispersion state of the nano-catalyst is effectively controlled, and the catalytic effect of the nano-catalyst is improved.

The application relates to a method, system and device for analyzing relaxation time of impact energy release of an energetic material, wherein the method comprises the following steps: establishing a diffusion control equation of the energetic material on a hit target; obtaining an atomic diffusion contribution item for characterizing an atomic diffusion rate based on the diffusion control equation and a reaction product layer; obtaining an interface reaction contribution item for characterizing an interface reaction rate based on a standard Avrami equation; analyzing a reaction degree of the energetic material by the atomic diffusion contribution item and the interface reaction contribution item, so as to obtain the relaxation time of the impact energy release of the energetic material. Through the application, a coupling mechanism of interface reaction and atomic diffusion at a microscale is realized, the coupling mechanism can be used for effectively analyzing the impact energy release of the energetic material, the prediction precision of the impact energy release relaxation time is improved, a reliable basis is provided for engineering design of the energetic material, and the problem of how to improve the calculation precision of the impact energy release relaxation time of the energetic material is solved.

The invention relates to a preparation method of a high-energy insensitive explosive-based active energetic material, and belongs to the fields of energetic materials, active fragment materials and efficient damage. The preparation method comprises the following steps: uniformly mixing an insensitive explosive with graphite powder to form a composite material A which has a core-shell structure and coats the insensitive explosive with graphite, uniformly mixing the composite material A with active metal, tungsten and polyvinylidene fluoride in an all-dimensional planetary ball mill, and then carrying out pre-pressing molding; and sintering to obtain a final product. As an energetic material, the material is very insensitive and safe in a static state, has certain toughness and strength, can be directly machined, and generates violent explosion and combustion to generate high heat and high temperature under the action of high-speed impact; as a fragment material, high kinetic energy is utilized, and high chemical energy released after impact explosion can implement comprehensive damage of penetration, implosion, longitudinal fire and overpressure on a target. The preparation method is wide in raw material source and low in price; the process is simple, low in cost and convenient for batch production.

This invention discloses a method for preparing g-C3N4-based composite energetic materials. The method employs simple physical grinding, in-situ reduction, and electrostatic self-assembly. First, g-C3N4 and explosive are physically ground at a specific mass ratio to obtain composite material 1. Then, ultrasonically treated g-C3N4 and GO are coated onto the surface of the explosive crystals through in-situ reduction to obtain composite material 2. Finally, the highly cationic properties of polyethyleneimine are used to modify the surface of ammonium nitrate explosives, and composite material 3 is obtained through electrostatic self-assembly. This invention combines g-C3N4 and GO to desensitize ammonium nitrate explosive crystals, resulting in an ammonium nitrate explosive composite material that simultaneously possesses desensitization and high energy performance. The high stability, high thermal conductivity, and lubricity of g-C3N4 and GO are utilized to passivate the mechanical sensitivity of the energetic material.

The utility model discloses an explosive sintering batching device for a Ni-Al energetic shaped charge liner base body, which belongs to the technical field of energetic material processing equipment and comprises a base, a vertical pipe, a vertical shaft, a first connecting beam and an ejector pin. The base is provided with counter bores for positioning the nylon seat; the vertical pipe is vertically fixed on the base, and a rubber layer is arranged on the inner side; the vertical shaft is of a square section structure and can be axially and movably arranged in the vertical pipe. The first connecting beam is connected with the top end of the vertical shaft and the ejector pin which vertically extends downwards to press the medicine tube. According to the device, through cooperative fixation of the ejector pin and the base, it is ensured that the explosive tube keeps vertical positioning in the explosive filling process, the problem that the explosive tube deflects due to explosive filling is effectively solved, and product defects caused by uneven sintering energy transfer are avoided. The finished product qualification rate of the explosive sintering cylinder is remarkably improved, the manufacturing time is shortened, and operation is convenient and reliable.

The invention discloses an energetic material, a preparation method thereof and application of the energetic material as an initiating explosive, an explosive and a pyrotechnic compound. The chemical formula of the energetic material is MC10H18B2N6; wherein M is selected from at least one of Mn, Fe, Co, Ni, Cu, Zn and Cd; the crystal structure of the energetic material belongs to a monoclinic system, and the space group is P21 / n. The obtained energetic material has excellent stability and safety, and is green and environment-friendly. Through experimental determination, the thermal stability is greater than or equal to 120 DEG C, the impact sensitivity is greater than or equal to 40J, and the friction sensitivity is greater than or equal to 240N. Compared with an existing commercial propellant (unsymmetrical dimethylhydrazine), the ignition delay time of the energetic material is equivalent, the defects that fuel and an oxidizing agent are seriously mixed and the combustion efficiency is low are overcome, and the energetic material has important commercial application value in the field of green high-performance energetic materials.

Heavy inert gas insulation layers are provided for one or more components of a launch system for a plurality of missiles. The layer may be integrated into the walls of the components or provided in inserts attached to the components. An inert gas fills a sealed void space in the walls or the insert. The inert gas has a density of at least 1.5 Kg / m3 and a thermal conductivity (Tcond_gas) of no greater than two-thirds of a thermal conductivity of air (Tcond_air) to form the heavy inert gas insulation layer. The inert gas may be Argon, Krypton, Xenon or a synthetic gas and is suitably held at a pressure of 760 Torr (1 atmosphere) or greater at sea level. The heavy inert gas insulation layer delays desensitization or inhibits premature reaction of the energetic materials inside the missiles due to high external temperatures. The insulation layers allow for more compact and dense configurations of the launch system and missiles.

This invention discloses a vacuum-assisted homogenization and temperature-controlled 3D printing method and apparatus for irregularly shaped viscoelastic propellants, belonging to the field of additive manufacturing technology for energetic materials. The vacuum-assisted homogenization and temperature-controlled 3D printing method for irregularly shaped viscoelastic propellants achieves online degassing and precise temperature control of the slurry in a closed vacuum environment through synergistic physical field control. The technical solution of this application has the following technical effects: it abandons the inert gas protection method that may introduce new gas sources, and adopts a synergistic physical degassing mechanism based on low vacuum negative pressure, supplemented by ultrasonic vibration and pulsed vacuum fluctuations. The stable negative pressure environment provides a continuous driving force for the escape of gas inside the slurry; ultrasonic vibration acts on the slurry, which can destroy the adhesion state of microbubbles and promote their aggregation; pulsed vacuum fluctuations cause the bubbles to be in a periodic expansion and contraction state, thereby accelerating their instability and rupture. The above three physical fields cooperate and work synergistically.

A method for handling a flowable material 208, comprises the step of: aligning a first container 206 with a dispensing means 202. A nozzle 204 extends from the dispensing means 202 at least partially into the first container 206. Flowable material 208 is deposited from the nozzle 204. The nozzle 204 is retracted while the flowable material 208 is being deposited from the nozzle 204. Further deposition of the flowable material 208 is stopped and the nozzle 204 removed from the first container 206 when a measured amount of flowable material 208 has been deposited. The first container 206 is then sealed. Also disclosed is a system for handling a flowable material 208. The flowable material 208 may be an energetic material, such as an explosive. [Figure 3 to accompany the abstract]

This invention discloses an impact energy tester and testing method, including a base, a sample reaction chamber, and a lifting device. The sample reaction chamber includes a sample reaction chamber shell, a sample seat, and an impact column. The lifting device includes a lead screw device and an electromagnetic release device, and also includes a guide rod installed on the top surface of the sample reaction chamber, with the electromagnetic release device sleeved on the guide rod. The impact energy tester also includes an impact block located between the electromagnetic release device and the sample reaction chamber shell. The impact energy tester also includes a gas detector. The impact energy tester provided by this invention uses mechanical lifting and release of the impact block to test the impact energy of energetic materials. The testing process is unmanned, resulting in low safety risks. Furthermore, the use of a gas detector to collect and detect the NO component generated during the reaction ensures that the test judgment is free from subjective human factors and has high testing accuracy.

The present application relates to a kind of stable preparation method of type II basic lead stephanate, belong to detonating explosive, firing charge, pyrotechnics, energetic material technical field.The method described in the present application is prepared by changing reaction raw materials, optimizing synthesis process and hydrothermal reaction, to obtain type II B-LTNR product.The method avoids the generation of type I acicular B-LTNR, not only improves the physical and chemical stability of B-LTNR, reduces mechanical sensitivity, but also significantly improves its dispersibility, mixing and packing density and other application performance.Using the method can ensure the quality and application reliability of the obtained type II B-LTNR product, the obtained product has good flowability, good crystal shape consistency, high yield and other characteristics, and the process is simple and easy to operate, high safety, suitable for industrial production, has good application prospect in detonating explosive, firing charge, pyrotechnics, energetic material and other related technical fields.

The invention belongs to the technical field of energetic material preparation, and particularly relates to a method for preparing nano explosive particles based on an acoustic resonance assisted ball milling technology. Comprising the following steps: weighing and measuring acoustic resonance materials; refining explosive particles through acoustic resonance high-frequency vibration; filtering and drying the nano explosive particles; acoustic resonance high-frequency vibration is applied to the refining process of explosive particles, zirconium oxide beads in a ball milling tank collide at a fixed same frequency under the action of same-frequency resonance, so that an efficient and stable working space is formed in a limited space of the ball milling tank, the explosive particles flow among the zirconium oxide beads through ball milling liquid, and the explosive particles are refined. And under the impact and resonance effects of the zirconium oxide beads, the explosive particles are crushed and refined, and finally the nano explosive particles are prepared. According to the invention, the acoustic resonance frequency is highly matched with the characteristics of the zirconia beads, so that a better synergistic effect can be generated, and the nanocrystallization degree of explosive particles is improved; in addition, the application range of the acoustic resonance technology is expanded through the refinement principle.

The invention belongs to the technical field of energetic materials, and discloses a synthesis method of a fusion casting carrier explosive 4-methoxy-1-methyl-3, 5-dinitropyrazol, commercially available 1-methylpyrazole-4-boronic acid pinacol ester is used as a raw material, a key intermediate 4-methoxy-1-methyl-1H-pyrazole is synthesized through a one-pot method two-step substitution reaction, and the fusion casting carrier explosive 4-methoxy-1-methyl-3, 5-dinitropyrazol is obtained. The product does not need to be purified, and can be directly nitrified after simple post-treatment, so that the casting carrier explosive product 4-methoxy-1-methyl-3, 5-dinitropyrazole is obtained. Compared with the prior art, the preparation method provided by the invention has the advantages of simplicity, high efficiency, low cost and the like, and has the potential of large-scale synthesis.

The energetic material ignition device comprises a substrate, an electric heating body and an ignition structure are arranged at one end of the substrate, an energetic material is arranged in the ignition structure, the electric heating body is in contact with the ignition structure, and the electric heating body is configured to generate heat after being electrified, ignite and enable the energetic material to explode so as to detonate the digital electronic detonator. The energetic material explodes by utilizing heat generated after the electric heating body is electrified, the energetic material explodes to generate high-temperature impact airflow, and the high-temperature impact airflow can uniformly act on the surface of ignition powder in the digital electronic detonator, so that stable and reliable detonation is realized, the ignition powder is prevented from being used, the selection range of the ignition powder is widened, and the ignition efficiency is improved. The device can select safer ignition powder, meanwhile, the energy is highly coupled from the energetic material to the ignition powder, the delay between the actual explosion time and the preset explosion time of the detonator is shortened, and therefore the time precision of detonating the digital electronic detonator is more controllable.

The invention discloses a liquid energetic material composed of non-dangerous chemical raw materials and a preparation method of the liquid energetic material, the liquid energetic material is formed by mixing an oxidizing agent concentrated solution and glycerin in proportion, and the oxidizing agent concentrated solution is obtained by mixing calcium ammonium nitrate, ammonium carbonate and water in proportion and then conducting filtration and vacuum concentration. According to the invention, the prior art is greatly improved, and the three raw materials are all non-dangerous chemicals, so that the traffic and storage safety in the long-time land and marine transportation process in the offshore oilfield operation can be greatly improved; the mode of obtaining the liquid energetic material on site is simple, and seamless butt joint operation with existing liquid gunpowder deflagration fracturing can be achieved; the influence of temperature on solubility is overcome, the composition proportion is moderate, the system can be completely dissolved after being prepared, the operation water adding amount is reduced by utilizing crystal water in the raw materials, and the preparation method is suitable for the environment in shortage of water resources.

The invention relates to the technical field of energetic material testing, and particularly discloses a method for testing volume cracking resistance of a high-energy solid propellant, which comprises the following steps: step 1, preparing a high-energy solid propellant volume cracking resistance test piece; 2, connecting the test piece with a gas storage tank in a sealed manner to form a sealed space; and 3, starting a pressurizing air pump of the air storage tank, recording the pressure of the sealed space, and completing the test when the maximum pressure value appears, so as to obtain the volume cracking resistance. The test method can quantitatively characterize the volume cracking resistance of the high-energy solid propellant, provides specific evaluation data for the volume cracking resistance of the solid propellant, and quantitatively characterizes the volume cracking resistance of the high-energy solid propellant through specific pressure values. The advantages and disadvantages of the volume cracking resistance of the solid propellants with different formulas can be tested.

The application discloses a kind of ignition and recoil force test system and method of energetic material.The heating ignition device of system is used to heat energy release testing device;Energy release testing device is used to excite the energetic material to be measured pre-placed in one end of energy release testing device under the heating action of heating ignition device, so that it releases energy and ejects product to one side to generate recoil force on the other side, and weight collection device is used to collect and record the mass change curve of the energetic material to be measured with time in the heating and energy release process of energetic material;Recoil force collection device is arranged on one side of energy release testing device, for collecting and recording the recoil force change curve generated by the energetic material to be measured with time in the heating and energy release process of energetic material;Temperature collection device is used to collect and record the temperature change curve of the energetic material to be measured with time in the heating and energy release process of energetic material.The application is convenient for measuring the thrust generated by energetic material, and convenient operation.