211results about "Ammonium perchlorate explosive compositions" patented technology

A gas propelled munitions anti-fouling system has a case having an open forward mouth end, a rear end, and an interior, the rear end defining a pocket that receives a primer and a passage communicating between the pocket and the interior of the case, a quantity of propellant received within the interior of the case, a quantity of anti-fouling composition received within the interior of the case, and a bullet having a rear portion inserted into the open forward mouth end of the case. The anti-fouling composition may have at least one salt and at least one acid. The acid may be anhydrous. The salt may be sodium chloride or sodium nitrate. The acid may be anhydrous citric acid. The anti-fouling composition may have at least one abrasive. The abrasive may be stannic acid. The anti-fouling composition may be 50% salt by weight and 50% acid by weight.

An explosive material composition containing, as an active ingredient, particles of a water-soluble reactive ingredient having an uniform particle size. Each particle is coated with an oil ingredient and/or a thickener. The coated particles form an agglomerate.

A propellant is disclosed, comprising, as binder, an ethylene copolymer especially ethylene/vinyl acetate copolymer. The binder may be silane-grafted and moisture curable. A solid propellant composition may contain a plasticizer that is solid or semi-solid at 20° C., and an additive to increase one or more of elongation, adhesion and tack. Examples of the solid or semi-solid plasticizer are selected from microcrystalline wax, macrocrystalline wax, an oxidized hydrocarbon polyolefin and a polyketone wax. Examples of the additive are selected from an aliphatic hydrocarbon, an aromatic, a hydrogenated hydrocarbon resin and a derivative of a rosin. Preferably, the binder composition contains 10-30% by weight of liquid plasticizer, 0-30% by weight of solid or semi-solid plasticizer and 20-40% by weight of at least one said additive. The propellant is particularly useful as a rocket propellant. A method of manufacture is disclosed.

The invention relates to a method for cladding energetic materials and particularly relates to a method for coating energetic materials by taking liquid CO2 as an anti-solvent, a dispersion agent and a drying medium. The method provided by the invention is mainly used for solving the technical problems of the existing method for coating energetic material that the coating is not uniform, the operation is complicated, some special energetic materials cannot be coated by a wet process, the solvent cannot be mutually soluble with a non-solvent to limit the application of the water (or solution) suspension method and cause the environment pollution. The invention provides a method for coating energetic materials by taking liquid CO2 as an anti-solvent, a dispersion agent and a drying medium. The method provided by the invention has the advantages of uniform coating, simple operation, wide application range and no environmental pollution.

The invention provides a solid gas generator and a preparation method thereof. The solid gas generator comprises 12 to 23% of a polyether adhesive, 1.2 to 3.6% of a curing agent, 50 to 80% of an oxidizing agent, 0 to 5% of a plasticizer, 0 to 30% of a cooling agent, 0 to 5% of a combustion conditioning agent and 0 to 2% of other additives, wherein the polyether adhesive is one or a composition of more than one selected from the group consisting of ethylene oxide tetrahydrofuran copolyether and propylene oxide tetrahydrofuran copolyether, the curing agent is one or a composition of more than one selected from the group consisting of toluene diisocyanate, isophorone diisocyanate and multifunctional aliphatic diisocyanate, and the plasticizer is one or a composition of more than one selected from the group consisting of dioctyl sebacate, acetyl triethyl citrate and triethyl glycerin tricarbonate. The solid gas generator provided by the invention has a negative pressure exponent of 0 to - 0.30 and provides a power source for attitude control and orbit control power systems of light-weight kinetic kill vehicles (KKV).

The invention discloses a method and a device for preparing a nanometer-eutectic energetic material. The method comprises the following steps that an energetic material is dissolved in a good solvent and then is transported into a temperature gradient heating furnace through inert gases in an ultrasonic spray manner, and then nanometer-eutectic energetic material crystals are collected through a high-voltage electrostatic field and the good solvent and the inert gases are cooled and recovered. The device used in the method is formed by sequentially communicating an ultrasonic device, the temperature gradient heating furnace, the high-voltage electrostatic field and a receiving device in a sealing manner. The method can prepare the energetic material crystals with the crystal size being 20-1000nm, is wide in preparation range, and can realize continuous operation. The preparation method is simple in procedures and is easy to operate, reaction conditions are mild and are easily controlled, and the method can be applied to various kinds of eutectic explosives. The crystal grains of the prepared nanometer-eutectic energetic explosives are uniform, and the purity is larger than 99.9 percent. Waste liquid in the preparation procedures is recovered, and the minimum pollution to the environment is realized.

A safe environment-friendly novel pyrotechnic composition is used as a powdery colorful flower-forming spray composition, and comprises the compositions in parts by weight: 20-50 parts of a high-energy oxidizing agent, 30-60 parts of nitrocellulose, 1-15 parts of a colouring agent, 1-15 parts of a combustible effect agent, 1-10 parts of an adhesive, and 1-10 parts of a stabilizing agent. A preparation technology for the novel pyrotechnic composition is simple, the pyrotechnic composition prepared by employing the above formula is relatively low in friction sensitivity and impact sensitivity, far higher in chemical stability and safety than those of other pyrotechnic compositions, slightly smoky and environment-friendly after being combusted, and is widely applicable to various pyrotechnic composition products.

A gas generating composition is obtained in which an amount of a combustion residue based on a unit amount of a gas generated is reduced.A gas generating composition comprising nitroguanidine, guanidine nitrate or a mixture thereof as a fuel and further an oxidizing agent. The oxidizing agent is a perchloric acid salt, a nitric acid salt or a mixture thereof, and when the oxidizing agent is ammonium perchlorate, a chlorine neutralizer is further incorporated.

The invention discloses a NiO/MXene composite material as well as a preparation method and application thereof. The composite material takes MXene as a supporting carrier, and NiO particles are uniformly dispersed on the surface of MXene, wherein the mass ratio of NiO to MXene is (2.98-50):50. The preparation method comprises the following =steps: (1) etching a certain amount of MAX material intoa HF acid solution with certain concentration, so as to obtain an MXene material; (2) mixing and stirring a certain amount of nickel salt and the MXene obtained in the step (1) into a beaker while dropwise adding a NaOH solution with certain concentration, stirring for a period of time, then washing, centrifuging, and carrying out vacuum freeze drying; and (3) putting a mixture prepared in the step (2) into a tubular furnace, and calcining in nitrogen atmosphere, so that the target product is obtained. The NiO/MXene composite material is applied to thermal decomposition of ammonium perchlorate(AP) and shows better catalytic effect; meanwhile, preparation technology is simple, and the NiO/MXene composite material has a good application prospect.

The present invention relates to a propellant composition which comprises hydroxy-terminated polyether (HTPE), N-butyl-(2-nitratoethyl)nitramine (BuNENA) and ammonium perchlorate (AP) and is insensitive to impact and thermal reactions and thus suitably used for a solid rocket propulsion unit.

According to the invention, metal hydride and an oxidizing agent are mixed, and under the action of an adhesive, the mixture is granulated to prepare a high-heat mixed explosive. The explosive contains the following components, by mass, 50-80% of cyclonite (RDX) and octogen (HMX) or hexanitrohexaazaisowurtzitane (CL-20), 10-25% of an oxidizing agent, 10-25% of metal hydride and 1.0-5% of a binder. According to the invention, metal hydride is added into the explosive for the first time so as to obtain the high-heat high-power explosive with the value of explosion heat being 14000-22000kJ/kg. The explosive has excellent sensitivity, and storage life of the explosive reaches 30 years. The explosive is suitable for charge by using press-fitting technology.

The present invention includes a salt compound having the chemical formula:

• • having a tricyclic structure with the third ring having either six or seven atoms.

The invention discloses a preparation method of a fluorine polymer/metal composite energy-containing material. According to the preparation method, ammonium perchlorate is doped in a fluorine polymermetal energy-containing system through solution crystallization method so as to obtain a novel composite energy-containing material. According to the preparation method, ammonium perchlorate decomposition is adopted to generated a gas product for enhancing the system pressure output and combustion reaction performance, at the same time, the gas obtained through ammonium perchlorate decomposition and reaction product carbon from a fluorine polymer metal system are subjected to oxidation reaction, energy and pressure release is accelerated, so that the fluorine polymer metal energy-containing system energy and combustion reaction characteristics are improved obviously. The preparation method is capable of improving the energy and pressure output of the fluorine polymer metal energy-containing system, and combustion reaction rate is converted from slow combustion to detonation and blast. Doping is adopted to form the novel energy-containing system, and it is possible for the novel energy-containing system to be used in fields such as solid propellant, metallized explosive, and gas generators.

The invention relates to a safe ignition powder and a preparation method thereof, belonging to the field of energetic materials. The safe ignition powder comprises 20 to 40% of carbon black, 30 to 50% of an oxidizing agent, 15 to 30% of coated calcium peroxide, 5 to 15% of hydroborate and 1 to 8% of a binder A. The safe ignition powder provided by the invention has high safety; and coated calcium peroxide prevents reaction of calcium peroxide with hydroborate and obstructs reaction of calcium peroxide with other components caused by collision and friction, so sensitivity is reduced, and safety in transportation and usage of the safe ignition powder is improved. The preparation method is simple, does not need complex equipment, is simple and easily practicable to operate and facilitate continuous production.

The invention discloses a supported copper oxide catalyst. A preparation method of the supported copper oxide catalyst includes weighing titanium powder, aluminum powder, titanium carbide powder and activated carbon powder according to the mole ratio of Ti to Al to C to TiC being 1.5:1.0:0.5:0.5, and subjecting the powder to microwave sintering to obtain high-purity compact Ti2AlC powder; grinding and sieving the Ti2AlC powder obtained after microwave sintering by an agate mortar to obtain 500-mesh powder; allowing the powder to react with hydrofluoric acid with the concentration of 20% for 6 hours, and performing deionized-water centrifugal drying to obtain a Ti2C material; subjecting the Ti2C to electroless copper plating and thermal oxidation to obtain the Ti2C-CuO-Cu2O catalyst. The supported copper oxide catalyst has the advantages that catalytic efficiency of ordinary copper oxide catalysts can be improved, high-temperature thermal decomposition temperature of ammonium perchlorate can be reduced remarkably, combustion efficiency can be improved, and catalytic efficiency is better than that of other catalysts.

The invention relates to a method for preparing micro-ammonium perchlorate. The method comprises the specific steps that an ammonium perchlorate saturated solution containing a surface active agent is prepared; an anti-solvent is conveyed to enter an external channel of a flowing focused type micro-mixer, ultrasound is started, a saturated solution is conveyed to enter an internal channel of the flowing focused type micro-mixer to be mixed with the anti-solvent; the obtained product is filtered and dried to obtain the micro-ammonium perchlorate with the good dispersity. The inner diameter of the internal channel, the distance between the internal channel and the external channel, the standing time of total materials inside the external channel, the volume ratio of the solvent to the saturated solution to the anti-solvent, ultrasonic parameters and the like are adjusted to prepare the micro-ammonium perchlorate with the controllable average grain diameter being 0.3-2 micrometers and the regular morphology. The process of preparing the micro-ammonium perchlorate by means of the flowing focused type micro-mixer is continuous and controllable, and the method has the advantages of being simple in technology, rapid, high in yield and safety performance, free of amplification effects and the like.

The invention introduces a discontinuous crystallization unit for the production of ball-shaped crystals comprising a crystallizer (1) that consists of a metallic cylindrical vessel with its inner surface of a hard material, with an oval or circular cross-section with a conical or vaulted bottom (12), fitted along its length with a duplicator (4) for cooling of the solution and/or suspension of the solution and crystals and a high-speed agitator (8) of a hard material with a drive (9) enabling speed control and thus the rate of the impact of the mechanical action of the agitator on roundness of crystals inside the vessel together with the inner surface of the vessel containing at least 2 baffles (5) of a hard material while the vessel is fitted with at least 1 orifice (10) at the top that at least independent branch of the circulation circuit (11) is connected to from the outside for the inlet of a heated solution and/or heated suspension of the solution and crystals by means of at least 1 circulation pump (2) and through at least 1 heat exchanger (3) and together with the duplicator (4) ensuring controlled periodic changes of temperatures of the crystal suspension around the cooling curve while an interconnection (13) pipeline is connected to the bottom (12) of the crystallizer (1) vessel that is connected to at least one branch of the circulation circuit (11).

A quaternary salt is added at low concentrations to a solid propellant, thereby increasing the conductivity of the polymeric binder to provide for safe discharge of static electricity at relatively low potentials.

The invention relates to a formula for reducing high pressure exponent of solid propellant and improving the performances of a rocket engine fuel. The formula is characterized in that 20-30% of an adhesive and a plasticizer, 0-15% of an oxidant ammonium perchlorate (AP), 30-45% of nitramine explosive, 10-30% of insensitive high explosive FOX-7 with the granularity of 8-200 [mu]m, 1.0-2.0% of a curing agent and 0.5-2% of a combustion stabilizing agent are added to a solid propellant system. The insensitive high explosive FOX-7 with good dispersibility and component compatibility, the AP, the adhesive and the plasticizer are used to guarantee the signal characteristic and the energy, technology and mechanical performances of the propellant, reduce the high pressure exponent of the propellant and guarantee the working reliability of an engine. The formula has the advantages of scientific formula, convenience in production, obvious effect and stable performances.