56results about "Metal azide explosive compositions" patented technology

High nitrogen gas generant compositions, useful for inflating passenger restraint gas inflator bags, comprise a nitrogen rich coordination compound selected from coordination complexes comprised of anionic nitro and nitrito ligands coordinated with a transitional metal template, and nonmetallic or nonmetallic / metallic cations. The gas generant compositions generate relatively more gas and less solids, and are safer than known gas generant compositions. Certain gas generant compositions ignite at lower autoignition temperatures thereby facilitating the use of an aluminum or light weight metal pressure vessel. Other gas generants self-deflagrate eliminating the need for other constituents in the composition. Novel methods for the synthesis of nonmetal derivative coordination complexes, guanidine and hydrazine for example, are also presented.

The present invention relates to a non-toxic primer powder composition for small caliber ammunition characterized by comprising potassium nitrate coated with shellac as an oxidizer, and particularly characterized by comprising 25-40 wt % of an initiating explosive, 10-30 wt % of nitrate ester as a fuel, 32-40 wt % of a shellac-coated potassium nitrate (KNO3) as an oxidizer, 5-10 wt % of tetracene as a first sensitizer, 3-9 wt % of a borosilicate powder as a second sensitizer and 0.1-0.2 wt % of a chemical binder.

A non-toxic, non-hydroscopic percussion primer composition and methods of preparing the same, including at least one explosive component that has been traditionally considered a moderately insensitive explosive or secondary explosive, and at least fuel particle component having a particle size of about 1.5 microns to about 12 microns, which allows the use of moderately active metal oxidizers. The sensitivity of the primer composition is created by the interaction between the moderately insensitive explosive and the fuel agent such that traditional primary explosives such as lead styphnate or DDNP are not needed. The primer composition also eliminates the risks and dangers associated with traditional nano-sized fuel particles.

The invention discloses a micro smoke ignition agent for fireworks, which consists of potassium perchlorate, carbon powder, nitro-cotton and / or nitroguanidine, a high-energy reducing agent and a detonation agent. The invention has the advantages that: an oxidant adopts a high-oxygen content and high-stability substance, so that the using amount can be controlled and smoke can be reduced; combustibles can release a large amount of heat during combustion, so that a high-temperature substance is generated; therefore, the using amount can be controlled and the smoke can be reduced; and main combustibles adopt high-oxygen content substances, so that the using amount of smoke oxidants can be reduced to the greatest extent. Therefore, only micro smoke is generated during combustion of the ignition agent. Due to the detection result of light transmittance, compared with that of the conventional same-class corresponding products, the produced smoke is reduced by 70 percent. Meanwhile, the configuration of the whole medicament system guarantees ignition performance and stability of the ignition agent, and the safety performance meets the requirement of the national standard.

The invention discloses an azide hydrazine nickel and making method of detonating medicinal compound, which comprises the following steps: adding soluble nickel salt and azide liquid and hydrazine hydrate solution in the water to do combination reaction; or adding azide solution and hydrazine hydrate solution in the nickel solution to do combination reaction; setting the feeding time for 30-40 min under 50-70 deg.c; cooling; sucking; washing; dehydrating; drying to obtain the product; adjusting pH value through adding diluted acid. The invention provides a safer, more energy-saving and effective pharmaceutical synthetic method, which improves flame sensitivity with low mechanic sensitivity and electrostatic accumulation.

The invention relates to a special gunpowder formula for firework colored drawing and special paper for firework colored drawing. According to the special gunpowder formula, gunpowder special for colored drawing is finally prepared from the raw materials such as nitrate, a combustible agent and a combustion speed regulator through proper proportioning. According to the special paper for firework colored drawing, flame retardant technologies are added on the basis of the common paper, so that the paper can resist high temperature and can be applied to firework colored drawing conveniently. Thespecial gunpowder can combust rapidly after being ignited, the produced temperature enables the added nitrate to be decomposed into the corresponding metal oxide, the oxide corresponding to the selected nitrate is nonferrous metal oxide, and the metal oxide generated through reaction firmly adheres to the special paper; furthermore, any adverse damage to the paper by the produced temperature is avoided. The defect that the traditional firework colored drawing has single color is overcome, so that spreading and development of the firework drawing are facilitated.

The present invention relates generally to carbon nanotubes, and more particularly to the interaction of single wall carbon nanotubes with hydrazoic acid to introduce energetic azide groups into the nanotubes to form activated carbon nanotubes.

An initiator explosive for detonating a second explosive that includes nanocrystalline silicon containing a plurality of pores and a solid state oxidant disposed within said pores.

The invention discloses a metal azide graphene compound and a preparation method thereof. Soluble metal salt, nano-metal powder or nano-metal oxide is used as a raw material, graphene oxide is used asa conductive carbon material additive, polyvinyl alcohol and the like are used as binders, and the nano-metal azide graphene in any shape is prepared. The azide composite material is prepared by putting several uniformly mixed materials into molds with different shapes and carrying out freeze drying, high-temperature carbonization and in-situ azide reaction. Compared with the traditional azide, the azide graphene initiating explosive obtained by the invention has the advantages that the particle size can reach hundreds of nanometers, the electrostatic sensitivity can be reduced due to the existence of conductive materials such as graphene, and the azide graphene initiating explosive can be designed into different shapes and matched with the charging mode of a micro-initiation system.

The invention relates to a preparation method of a high-density metal azide with arbitrarily regulated filling density, and belongs to the field of initiating explosive devices. The preparation methodmixes hollow microspheres with different diameters constructed by nanoporous metal / metal oxide and fills a restraint shell with the hollow microspheres to prepare hollow microspheres constructed by the nanoporous metal / metal oxide with a little filling density in the restraint shell, and then places the restraint shell filled with the hollow microspheres constructed by the nanoporous metal / metaloxide in a reactor to be subjected to gas-solid in-situ chemical reaction with hydrazoic acid gas to prepare the metal azide with high filling density. The preparation method of the invention can prepare the high-density metal azide having a filling density of 50%-92% of theoretical density in the restraint shell. The prepared high-density metal azide (for example, the copper azide dose is more than or equal to 0.4 mg) in a single restraint shell can detonate HNS-IV, CL-20, PETN, RDX and other explosives with a filling density being 75%-92% of the theoretical density and a diameter being morethan or equal to 0.5 mm or ignite B / KNO3 and other ignition powder.

The invention discloses a high-performance copper azide composite initiating explosive and a preparation method thereof, and belongs to the crossing field of nano-chemistry and energetic materials. Firstly, a novel copper-sulfur cluster-based porous coordination polymer (Cu12bpy for short) is prepared, and the chemical formula of the compound is [Cu12(StBu)9(CF3COO)3(bpy)4]n. Then, Cu12bpy is usedas a precursor to prepare a copper azide-heteroatom co-doped porous carbon material (CA-HPCH for short); and the CA-HPCH has a high copper azide content (89.43%), excellent ignition capacity (H50>=60cm) and low electrostatic sensitivity (E50=1.1 mJ), and is superior to common copper azide in performance. The micro initiating device made of CA-HPCH has short ignition time (7.0[mu]s) and low ignition energy (0.106 mJ), the performance of the composite initiating explosive exceeds that of most reported initiating explosives, and a basis is provided for further designing and synthesizing a high-performance initiating explosive.

The application discloses an energy-containing material, a preparation method thereof and application of the energy-containing material as an initiating explosive, an explosive and a pyrotechnic compound. The chemical formula of the energy-containing material is MC4H4N14, wherein M is selected from at least one of a group IB metallic element, a group IIB metallic element, a group VIIB metallic element and a group VIII metallic elements; the crystal structure of the energy-containing material belongs to a triclinic system and a space group P-1. The energy-containing material has superior stability and security, and is green and environmentally friendly. As proved by experiments, the thermal stability of the energy-containing material is greater than 200 DEG C, the impact sensitivity is greater than 1J, the friction sensitivity is greater than 5N, and the electrostatic spark sensitivity is greater than 4mJ. The energy-containing material disclosed by the application is 2 to 4 times the explosive energy of the existing commercial initiating explosive, and the defects of severe lead pollution and insufficient explosive performance are overcome; the energy-containing material has important commercial application value in the field of environment-friendly high-performance energy-containing materials.

The present invention relates to an electric detonator (1) comprising a cap (2), comprising a priming charge (3) and an electrode (4), comprising a positive pole, a negative pole and a resistor element (8), the said priming charge (3) comprising at least two primary explosives, a first primary explosive (9) and a second primary explosive (10), and at least one secondary explosive (11). The electric detonator is characterized in that the two primary explosives (9, 10) and the secondary explosive (11) are arranged in layers, in an increasing degree of sensitivity, bearing one against the other, wherein the first primary explosive (9), constituting the most sensitive of the two primary explosives (9, 10), is arranged closest to the resistor element (8), and in that the second primary explosive (10) is arranged thereafter between the first primary explosive (10) and the secondary explosive (11). The invention also relates to a production method for the said electric detonator (1).

The invention proposes a trinitride and a synthesis method thereof, and application thereof as a heat-resisting initiating explosive. The chemical name of the trinitride is azide cadmium, the molecular formula is Cd(N3)2, the trinitride reacts through a cadmium nitrate solution and a sodium azide solution under the conditions of required reaction temperature, material ratio, charging sequence, reaction time and pH value of a reaction solution, so as to obtain the azide cadmium. The performance of the azide cadmium is subjected to comprehensive assessment by a test. The impact sensitivity of carbonic anhydrase (CA) is equivalent to that of lead azide while the friction sensitivity and the static-electric sensitivity are more insensitive than those of the lead azide; the decomposition peak temperature of the CA is higher than that of the lead azide, and achieves 334-370 DEG C; the explosion temperature can be up to 417-426 DEG C; the initiating power of the CA is much stronger than that of the lead azide. Thus, the CA can be applied to heat-resisting detonators and various miniature detonators instead of the lead azide.

The invention discloses a preparation method of copper azide / cuprous azide packaged by a conductive metal organic framework. According to the method, a conductive copper-containing metal organic framework material is adopted as a precursor, and azido of the precursor is completed through a liquid-solid electrochemical azido reaction. According to the invention, the copper azide / cuprous azide nanocrystals are highly and uniformly embedded in the conductive frame, so that agglomeration of copper azide / cuprous azide can be effectively avoided, static electricity generated by friction, displacement and the like can be reduced, the conductive frame can promote effective transfer of charges, accumulation of static charges is avoided, and the static safety performance is improved. Besides, the liquid-solid electrochemical azide reaction has the advantages of safety, high efficiency, short reaction time, high operability and the like, and the preparation process is compatible with the MEMS process, so that the application of the copper azide / cuprous azide material in micro devices is facilitated.

Energetic compounds based on bismuth salts with reduced toxicity that are obtained through the reaction of soluble bismuth salts with soluble salts of organic or inorganic energetic compounds based on azides, derivatives aromatic nitro compounds or nitrogenous heterocyclic compounds, together with the methods for their preparation and application.

The invention provides a foam graphene-based metal azide compound and a preparation method thereof. Soluble metal salt, nano metal powder or nano metal oxide is used as a raw material, graphene is used as a conductive carbon material carrier, and the foam graphene-based metal azide compound is prepared. The azide is a metal azide initiating explosive material based on foamed graphene, which is prepared by uniformly dispersing nano metal / metal oxide in a graphene oxide solution and carrying out high-temperature hydrothermal reduction reaction, freeze drying and in-situ azide reaction. Comparedwith the traditional azide, the foam graphene-based azide initiating explosive has the advantages that the particle size can reach hundreds of nanometers, the electrostatic sensitivity of the foam graphene-based azide initiating explosive can be greatly reduced due to the existence of the graphene conductive material, and the safety of the foam graphene-based azide initiating explosive is greatlyimproved.

The invention relates to a preparation method for high-density copper azide with a constrained shell, and belongs to the field of initiating explosive devices. Nanoporous copper or nanoporous copper oxide fills the constraining shell and then is stored, and then the high-density copper azide is prepared by a gas-solid in-situ chemical reaction with hydrazoic acid gas before use; and risks of production, transportation and post-explosive pressing of the traditional primary explosives are avoided during the operation. The prepared copper azide with the constrained shell has high loading density,no dangers during the loading process, safe transportation and storage, and strong detonation power. The explosive quantity of single-shot copper azide in the constrained shell belongs to the submilligram class, and the preparation process is green and pollution-free. The high-density copper azide of which the loading density is 1.4 to 3.2g / cm<3> can be prepared by the method disclosed by the invention, and the prepared high-density copper azide in the constraining shell can initiate explosives such as HNS-IV, CL-20, PETN and RDX of which the loading density is 75% to 92% of the theoretical density and the diameters are not smaller than 0.5mm and ignite igniters of B / KNO3 and the like when the explosive quantity of the high-density copper azide is not smaller than 0.4mg.

The invention discloses a copper-based suspension, and belongs to the field of energetic materials. The copper-based suspension consists of copper-based powder, polyvinyl alcohol, boric acid and water. A preparation method of the copper-based suspension comprises the following steps: dissolving certain amounts of polyvinyl alcohol and boric acid in water, performing mixing until uniformity, addingcopper oxide or copper powder, stirring for reacting for a certain time, and lowering the temperature to room temperature in order to obtain the copper-based suspension. The copper-based suspension liquid prepared by the method has the characteristics of wide powder content range, good settling resistance, and easiness in solvent removal, and can provide copper oxide and copper powder precursorsfor copper azide and copper-based pyrotechnic composition.

The invention discloses a method for preparing low-sensitivity copper azide by compounding rGO and copper nano-wires. The method comprises the following steps: preparing copper nano-wires by using a liquid phase reduction method, adding graphene oxide in the copper nano-wire synthesis process, preparing an electrophoretic solution from the prepared copper nano-wire / reduced graphene oxide compositematerial by using catechuic acid as a reducing agent through a hydrothermal method, carrying out an electrophoretic deposition experiment by using graphite as an anode and using a silicon wafer as acathode to deposit the surface of the silicon wafer, and carrying out azidation to prepare the low-sensitivity copper azide prepared from the composite rGO and the copper nano-wires. According to theinvention, with the preparation method, the influence of external force on the reaction product can be effectively reduced so as to improve the safety and the reliability; sodium azide and nitric acidare used as the reactants, the adopted device is simple, and the azidation efficiency is high; and the accumulation of electrostatic charges on the composite material is reduced through the carbon material, so that the electrostatic sensitivity of the copper azide is reduced while the excellent detonation performance of the copper azide is not affected.

Belonging to the technical field of blasting, the invention discloses a novel electronic detonator priming and a preparation method thereof. According to the invention, nickel hydrazine azide, magnesium powder, boron powder, potassium perchlorate, potassium chlorate, barium chromate and other components are adopted as the raw materials to prepare the priming. The electronic detonator priming provided by the invention has low ignition point and high detonation velocity, is conducive to reducing the action time of the electronic fusehead, generates high heat and sensitivity to flame during combustion, and can ignite basic detonators reliably. The electronic detonator fusehead prepared from the electronic priming provided by the invention has the characteristics of good ignition reliability and high delay time precision.

The invention discloses a method for preparing low-sensitivity copper azide by compounding carbon nano-tubes and copper nano-wires. The method comprises the following steps: preparing copper nano-wires by utilizing a liquid phase reduction method, mixing the copper nano-wires and single-walled carbon nano-tubes, depositing the prepared composite material on an electric-conducting substrate by utilizing an electrochemical deposition method, and preparing the copper azide / carbon nano-tube composite energetic material through a gas-solid phase azide reaction. According to the preparation method provided by the invention, the influence of external force on the reaction product can be effectively reduced so as to improve the safety and the reliability; sodium azide and stearic acid are used asthe reactants, the adopted device is simple, and the azidation efficiency is high; and the accumulation of electrostatic charges on the composite material is reduced through the carbon material, so that the electrostatic sensitivity of the copper azide is reduced while the excellent detonation performance of the copper azide is not affected.

The present invention provides a gas generating composition comprising a light rare earth compound.

Te invention relates to an ignition charge, an electric ignition fuse head and a preparation method of the electric ignition fuse head. The ignition charge provided by the invention is prepared from the following preparation raw materials in percentage by mass: 60 to 80 percent of potassium picrate, 20 to 40 percent of nickel hydrazine azide and the balance of binder, wherein the content of the binder is 80 to 110 percent times the sum of the contents of the potassium picrate and the nickel hydrazine azide. According to the ignition charge, the electric ignition fuse head and the preparation method of the electric ignition fuse head, the advantages that the firing precision and the production safety can be improved are realized.

The invention discloses a core-shell structure carbon-based copper azide composite energetic material and a preparation method thereof. The composite energetic material takes large-particle copper azide as a core and amorphous carbon uniformly distributed with copper azide as a shell, a Cu-coated MOF hybrid with a core-shell structure is constructed by accurately controlling the dissolution rate of cuprous oxide and the MOF crystallization rate, and an amorphous carbon composite material embedded with cuprous oxide nanoparticles is obtained through calcination on the basis. And then through a gas-solid phase azidation reaction, the core-shell structure carbon-based copper azide composite energetic material is constructed. According to the composite energetic material, the topological structure of the three-dimensional metal organic framework material is used for uniformly isolating a copper azide component in an energetic system, on one hand, the advantage of high energy density of copper azide is played, on the other hand, the sensitivity of the composite energetic material is greatly reduced by using the carbon material, and the prepared composite energetic material has excellent performance of high energy insensitivity.