109 results about "Energetic material" patented technology

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.

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.

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.

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.

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 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.

The application discloses a kind of energetic material material belt conveying device, can ensure that most of the grain smoothly enters next process, effectively reduce the grain that falls in conveying process;Can effectively prevent the grain from remaining on the conveying belt, facilitate subsequent cleaning;Driving assembly is provided with dust cover, and has positive pressure protection function, can effectively prevent propellant dust and explosion-proof motor direct contact and cause safety accident;Can avoid explosion-proof motor to be drenched by fire rain shower, ensure that driving assembly still can normally operate after fire rain shower;Can monitor the temperature of explosion-proof motor at any time, and can prevent explosion-proof motor overheat and cause safety accident;Can effectively prevent the safety problem caused by mechanical rolling and electrostatic effect of grain, powder.

The invention discloses a preparation method and a use method of a controllable conductive high-energy self-destruction fiber membrane, relates to the technical field of energetic materials and conductive self-destruction, and aims to solve the problem that electric energy cannot be directly applied to stimulate self-destruction in an existing method and expand self-destruction ways and application scenes. The preparation method of the self-destruction fiber membrane comprises the following steps: dissolving the azido polyether thermoplastic elastomer and the fluorine-containing polymer in a composite solvent, then adding the ammonium nitrate explosive and the nano metal powder, ultrasonically stirring uniformly, then preparing the self-destruction fiber membrane through electrostatic spinning, and finally, adhering a high-conductivity silver simple substance on the surface of the self-destruction fiber membrane by adopting a silver mirror reaction. The application method comprises the following steps: combining the obtained self-destruction fiber membrane with a commercial flexible circuit board base material to prepare a self-destruction device which is stably conductive under safe electric power, and otherwise, rapidly exploding and self-destructing. According to the method provided by the invention, the technical difficulty that a common self-destruction material can only be self-destructed through thermal excitation is solved, and controllable fire blast self-destruction under electric energy stimulation is realized by introducing a high-conductivity silver simple substance through a silver mirror reaction.

The invention relates to a quick-burning film material and a preparation method thereof, and belongs to the technical field of energetic materials, and the quick-burning film material comprises the following components in percentage by mass: 35-40% of a metal material, 35-40% of a fluoropolymer and 25-30% of a fiber material. The preparation method comprises the following steps: dissolving a fluorine polymer into an ethyl acetate solvent, fully stirring after the fluorine polymer is fully dissolved, then increasing the stirring speed, gradually adding aluminum powder, an aluminum-lithium alloy, magnesium fibers and carbon fibers, continuously stirring to be uniform, and increasing the stirring temperature to obtain quick-burning material slurry; placing the quick-burning material slurry on a hot plate type spin coater, heating and rotating, and naturally cooling to obtain the quick-burning thin film material with the normal-pressure burning speed of 1200-1400 mm / s, the friction sensitivity of 10-30% and the impact sensitivity of 10-30%. The prepared quick-burning thin film material has important application potential in the fields of large-area quick ignition of engines and the like.

The application discloses a grading method for evaluating the influence of additives on the thermal stability of explosives based on DSC, and belongs to the field of energetic materials and explosives. The thermal decomposition of single-element explosives and explosives with additives is tested under dynamic conditions by using DSC to obtain the number of exothermic peaks, the peak temperature of the exothermic peaks and the specific heat of unit explosives. The influence of the additives on the thermal stability of the explosives is preliminarily judged according to the number of exothermic peaks and the peak shape. If the number of exothermic peaks and the peak shape have no obvious influence, the grading evaluation is carried out according to the peak temperature of the exothermic peaks and the specific heat of unit explosives. The application has the advantages of simple test conditions, less sampling, short time consumption, low test cost, and the like. The test is carried out by using the proportion of additives and single-element explosives in an actual explosive formula, the influence of a small amount of additives on the thermal stability of single-element explosives can be accurately reflected, and more accurate results can be obtained.

Vacuum insulation layers are provided for one or more components of a launch system for a plurality of missiles. The vacuum insulation layers may be integrated into the walls of the components or provided in inserts attached to the components. A medium or high vacuum is pulled on a sealed void space in the walls or the insert. The vacuum insulation layer provides a thermal conductivity (Tcond_vac) of less than one-third of a thermal conductivity of air (Tcond_air). The vacuum 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.

The invention discloses a preparation method of a composite explosive based on in-situ initiation of a graft polymer on the surface of an explosive crystal. The preparation method comprises the following steps: (1) introducing a large number of active groups on the surface of the explosive crystal; (2) preparing explosive crystals containing initiator active sites on the surface; and (3) adding the explosive crystal containing initiator active sites on the surface into a reaction medium, introducing nitrogen to remove oxygen in a reaction system, then adding a polymer monomer, a metal halide and a ligand into the reaction medium, finally adding a reducing agent, and stirring and reacting under nitrogen protection and heating conditions to obtain the polymer. And initiating polymerization of the polymer monomer on the surface of the explosive crystal in situ to form a polymer brush coating layer. The invention also discloses a composite explosive based on the in-situ initiated graft polymer on the surface of the explosive crystal. According to the invention, a multi-layer interface structure composed of the bionic interface material and the polymer brush is constructed on the surface of the explosive crystal, so that the mechanical enhancement of the composite energetic material is realized.

The invention discloses a treatment and resource utilization method of sludge rich in organic matters, which comprises the following steps: dehydrating the sludge rich in the organic matters to enable the water content of the sludge to be lower than 5%; the dewatered sludge is crushed and ground, and micron-sized energetic powder is obtained; preparing the explosive by taking the micron-sized energetic powder as a reducing agent; the prepared explosive is used for mine blasting. According to the method, low-cost treatment and resource utilization of the sludge rich in the organic matters are realized, and the pollution of the sludge rich in the organic matters to the environment can be reduced; the obtained energetic material can serve as a blasting material to be applied to mine blasting, the blasting performance is excellent, and meanwhile the blasting cost can be reduced.

The application discloses a laser loading energetic material detonation velocity rapid prediction method and system, and belongs to the field of energetic material detonation performance detection. The application uses a pulse laser to interact with an energetic material to generate a shock wave, uses a single-point APD detector to record and store voltage changes of the APD, obtains an attenuation signal of the shock wave when the shock wave passes through a detection light beam, extracts interval time between a pulse signal and different height attenuation peaks from the energetic material surface, fits a time-position relationship through a corrected point explosion model, obtains corresponding shock wave characteristic velocity, establishes a linear regression relationship with a macroscopic detonation velocity, and realizes rapid prediction of the energetic material detonation velocity. The application only needs 5-10 mg of a sample, realizes extraction of the shock wave velocity of the energetic material through a single-point detector, obtains the shock wave characteristic velocity, linearly fits the shock wave velocity and a known detonation velocity, and predicts the energetic material detonation velocity. The application can improve the research and development efficiency of the energetic material and reduce the research and development cost.

The invention discloses a volatile gas concentration detection device and method in a water suspension granulation process, and relates to the field of safety and manufacturing of energetic materials, and the detection device comprises a water suspension granulation reaction kettle, a volatile gas concentration detection unit, a bonding system dropwise adding unit and a vacuum control unit. The water suspension granulation reaction kettle is made of a glass material and is provided with an explosion-proof motor, a stirring paddle and a granulation temperature control unit, and the granulation temperature control unit comprises a water bath jacket of the water suspension granulation reaction kettle and a circulating water bath kettle; the volatile gas concentration detection unit comprises a drying module, a pumping module and a gas concentration sensor; the bonding system dropwise adding unit comprises a peristaltic pump and a bonding system solution tank; the vacuum control unit comprises a vacuum controller and a vacuum circulating water pump; the device and the method provided by the invention can realize high-humidity interference resistant volatile gas concentration detection in the water suspension granulation process.

This invention discloses a method for strength verification of a propellant loading fixture for energetic materials, comprising: identifying the weak components of the propellant loading fixture for strength verification, wherein the weak components are the pressure bar and the upper pressure block; the strength verification includes verifying the crush strength and stability of the pressure bar, quantitatively evaluating the stress distribution of the pressure bar and the upper pressure block under axial load, examining the mechanical behavior at the contact point between the pressure bar and the upper pressure block, and determining the strength from a numerical simulation perspective; using an analysis method combining theoretical calculation and finite element simulation, the strength verification and validation of the pressure bar and the upper pressure block of the dedicated propellant loading fixture are completed. This method can confirm that the stress and deformation of the propellant loading fixture are within the elastic range, and the structural integrity meets the requirements.

The application discloses a solid rocket engine charge embedded with series-connected metal wires, which comprises metal wires A, metal wires B, propellant and heat insulation; the metal wires A and the metal wires B are connected in a head-to-tail mode, the thermal conductivity of the metal wires A is less than that of the metal wires B; the diameters of the metal wires A and the metal wires B are less than 2 mm; the propellant is an energetic material; and the heat insulation is made of a high-temperature-resistant and ablation-resistant material. The application has a large filling ratio, and an end-surface combustion grain type is used to ensure that the engine realizes the maximum filling ratio; the process is simple, the charge is formed in one time, and the charge preparation time is short.