47 results about "Argon atmosphere" patented technology

This invention relates to the field of ferroalloy smelting technology and discloses a high-carbon ferromanganese and its preparation method, comprising the following steps: raw material pretreatment; converter preheating and bottom material laying: pretreated high-grade manganese ore, lime, and coke powder are mixed and added as bottom material to the CLU converter for preheating; iron addition and initial reduction: high-carbon ferromanganese is added to the converter, and graphite fragments are added, and initial reduction is carried out under a pure argon atmosphere; atmosphere control and second-stage reduction: when the carbon content of the molten iron drops to 5.0-5.8%, the reblowing gas is switched to a mixed gas of argon, CO, and CH4, and the remaining high-grade manganese ore, silicon carbide, ferrosilicon manganese alloy, and supplementary coke powder are added in batches, while adjusting the slag composition; endpoint judgment and iron tapping. The high-carbon ferromanganese of this invention has precise composition and high purity, and the preparation method is characterized by high efficiency, low consumption, greenness, and high manganese recovery rate, enabling the industrial-scale production of high-carbon ferromanganese.

This invention discloses a near-space epitaxial method for significantly improving the uniformity of cadmium zinc telluride (CdZnTe) epitaxial films based on air-firing substrate treatment. The method involves air-firing a cleaned and dried gallium arsenide (GaAs) substrate at a predetermined temperature under argon atmosphere. The growth surface is calibrated before air-firing, and the GaAs substrate after air-firing exhibits a matte finish under optimal parameters. A CdZnTe polycrystalline block is used as the growth source. The polycrystalline block is trimmed to fit into the mask apertures and then subjected to grinding, ultrasonic cleaning, and air-firing to remove surface impurities and mechanical damage layers. During the film growth stage, appropriate growth parameters are set in a near-space sublimation furnace to allow CdZnTe to epitaxially grow on the GaAs substrate.

The present application relates to a kind of methods for preparing composite reducing agent for industrial silicon by using grinding medium to strengthen different caking coal, and belongs to the technical field of preparing composite reducing agent for industrial silicon.The present application uniformly mixes high-viscosity coal powder and non-viscosity coal powder to obtain coal powder mixture A, coffee wastewater is added to the coal powder mixture A and grinding is carried out to obtain coal powder mixture B;the coal powder mixture B is pressed to form a cylindrical blank;the cylindrical blank is placed in an argon atmosphere and subjected to microwave calcination, and is cooled to room temperature with the furnace to obtain a composite reducing agent pellet for industrial silicon.The present application adds coffee wastewater to the mixed coal powder, so that the coffee wastewater penetrates into the pores of the mixed coal powder, increases the contact area between different caking coals, and further increases the reaction rate of the mixed coal in smelting by microwave heating, promotes the crosslinking rearrangement of the structure of the mixed coal, and reduces the reaction activation energy.

The application discloses a preparation method and application method of a multi-level hole nitrogen-doped carbon loaded iron oxide cluster and iron single-atom catalyst, and comprises the following steps: S1, preparing an iron-based metal organic framework; calcining the iron-based metal organic framework under a nitrogen or argon atmosphere at high temperature to obtain a carbonized iron-based metal organic framework; S2, adding 50 mg of the carbonized iron-based metal organic framework into 100 mL of an acid solution, and magnetically stirring at room temperature; and removing unstable iron species through acid washing; S3, repeatedly leaching the carbonized iron-based metal organic framework after the acid washing with distilled water, and drying the carbonized iron-based metal organic framework in a vacuum drying box after washing to neutrality; and S4, grinding the powder obtained in the step S3 with a jade mortar to obtain the multi-level hole nitrogen-doped carbon loaded iron oxide cluster and iron single-atom catalyst. The application can effectively increase channels for reaction substrates to reach active sites, improve utilization of the active sites, and strengthen the performance of traditional iron single-atom catalysts, and can be used for catalytic activation of persulfate.

The application discloses a flexible boron nitride homojunction pn and a preparation method, wherein a sulfur-doped n-type boron nitride film is grown on a sapphire substrate through a low-pressure chemical vapor deposition technology; a magnesium-doped p-type boron nitride film is grown on a copper substrate through a low-pressure chemical vapor deposition technology; the sulfur-doped n-type boron nitride film and the magnesium-doped p-type boron nitride film are transferred to a flexible substrate through a polymethyl methacrylate assisted liquid phase exfoliation technology, and heat treatment is conducted in an argon atmosphere to obtain a flexible boron nitride homojunction pn. The application realizes efficient n-type and p-type doping of the boron nitride film, and prepares a boron nitride-based homojunction pn on the flexible substrate through a large-area film exfoliation and transfer technology. The homojunction structure has high lattice matching degree and low junction formation energy, further develops the preparation and research of van der Waals homojunctions in the field of ultrawide bandgap materials, and has great application prospect in the fields of optoelectronic devices and high-power power electronic devices.

This invention discloses a method for preparing carbon nanotube spirals synergistically optimized with graphene oxide and nickel, as well as the resulting products and applications. The steps are as follows: first, Ni nanoparticles are grown in situ on the surface of carbon nanotube spirals (CNCs) by cation exchange method to obtain Ni / CNCs; then, annealing is carried out at 450°C for 2 h in an argon atmosphere, and graphene oxide (GO) is electrostatically self-assembled onto the surface of Ni / CNCs to obtain GO / Ni / CNCs; then, GO / Ni / CNCs are filled into polytetrafluoroethylene (PTFE) by blending and rolling method to obtain PTFE / GO / Ni / CNCs composite film; finally, films with filling amounts of 20% and 50% are pressed together to form a bilayer film. The composite material obtained by this invention is a corn-like structure of Ni / CNCs coated with GO. Using CNCs as the framework, PTFE / GO / Ni / CNCs composite material is prepared by cation exchange and electrostatic self-assembly. The process is simple, can precisely control the number and size of Ni nanoparticles, and solves the shortcomings of Ni nanoparticles being of different sizes and unevenly distributed. It has good electrical conductivity, electromagnetic wave absorption, electromagnetic shielding, and photothermal properties, and has wide application value in fields such as light-driven heating and electromagnetic protection.

The application discloses a sea urchin-shaped hollow series metal organic framework structure and a preparation method and application thereof, and the method comprises the following steps: uniformly dispersing precursors MOFs and organic ligands in N,N-dimethylformamide, then transferring to a high-pressure reaction kettle, and placing the reaction kettle in a constant-temperature air drying box for reaction; after the reaction is completed, centrifuging, washing and drying the product to obtain the sea urchin-shaped hollow series metal organic framework structure. The sea urchin-shaped hollow series metal organic framework structure is placed in a tube furnace in an argon atmosphere, high-temperature annealing carbonization is performed to form a sea urchin-shaped hollow series Co-MOF-74@C structure. The sea urchin-shaped hollow series Co-MOF-74@C structure is mixed with selenium powder, then annealing is performed under the protection of an argon atmosphere to obtain a sea urchin-shaped hollow series Co-MOF-74 metal selenide@carbon heterojunction. The sea urchin-shaped hollow series Co-MOF-74 metal selenide@carbon heterojunction can be used for preparing a sodium ion battery negative electrode material, and the electrochemical performance of the battery is improved.

This invention discloses a method for preparing one-dimensional network nanotube MOF-derived selenide@porous carbon materials and their applications. The method includes the following steps: dispersing ZnCo-BTC nanowires in an ethanol-water solution to form a uniform suspension A; dissolving 2-methylimidazole in an ethanol-water solution to form a solution B; preheating solution B to the reaction temperature in a water bath, pouring in suspension A, stirring at a constant temperature, centrifuging the product, washing it multiple times with ethanol and water, and finally drying it to obtain a one-dimensional tubular MOF material. Annealing this one-dimensional tubular MOF material with melamine in an argon atmosphere yields a porous carbon nanotube material with a network structure. Mixing the one-dimensional network porous carbon nanotube material with selenium powder and annealing it under argon protection yields the one-dimensional network nanotube MOF-derived selenide@porous carbon material. This invention is simple to operate, the process is controllable, and the prepared product can be widely used in electrochemical energy storage, separation, catalysis, and drug sustained release.

The application relates to the field of new materials, in particular to a method for preparing a uniform multilayer molybdenum-based transition metal chalcogenide film on a liquid phase layer surface. The method specifically comprises the following steps: depositing a non-metallic element capable of forming a low-melting-point alloy phase with gold on the surface of a clean gold substrate by physical vapor deposition under an argon atmosphere; annealing the substrate treated above under certain parameters to build an alloy surface layer and use the alloy surface layer as a growth substrate; introducing a volatile sulfur source and a molybdenum source at high temperature to grow a uniform multilayer molybdenum-based transition metal chalcogenide film. The thickness of the alloy surface layer, the atmosphere and the growth temperature are adjusted to control the number of layers of the molybdenum-based transition metal chalcogenide film. The method can be used to prepare a high-quality and uniform-thickness multilayer molybdenum-based transition metal chalcogenide film, lays a foundation for the application of the molybdenum-based transition metal chalcogenide in the fields of nanoelectronic devices and photoelectric devices, and can be widely applied to the field of thin film chemical vapor deposition preparation.

This invention relates to the field of composite material technology, specifically to a one-step method for preparing a metal carbide coating on the surface of diamond powder using dual-target magnetron sputtering technology. The method includes: pretreating diamond particles to remove surface impurities; loading the pretreated diamond particles into a vacuum rolling deposition apparatus, using a metal target and a graphite target as targets, and directly depositing a metal carbide coating on the surface of the diamond particles via dual-target magnetron sputtering in an argon atmosphere. This method eliminates the need for subsequent high-temperature heat treatment, performing the process near room temperature, thus avoiding thermal damage to the diamond and oxidation of the metal coating. The process is significantly simplified, highly efficient, and easy to implement. By controlling the sputtering parameters, a dense, uniform, high-purity, and controllable thickness metal carbide coating can be obtained on the surface of the diamond particles, effectively optimizing the interface between the diamond and the metal matrix, and laying the foundation for the preparation of high-performance diamond / metal composite materials.

This invention provides a method for preparing a multidimensional powdered hydrogen storage material with high mass transfer and high heat transfer, relating to the field of hydrogen storage material preparation technology. The method includes the following steps: selecting hydrogen storage material particles as the initial hydrogen storage material, selecting a metal mesh or foam material as a two-dimensional or three-dimensional framework, and adding a pore-forming agent to an organic solvent containing a high-temperature resistant resin to obtain a binder solution; under the assistance of the binder solution and ultrasonic vibration, uniformly filling the pores of the framework with the hydrogen storage material particles; and heating and curing the filled material under an argon atmosphere to obtain the multidimensional powdered hydrogen storage material with high mass transfer and high heat transfer. Compared to the initial powdered hydrogen storage material, the multidimensional powdered hydrogen storage material prepared by this invention has a thermal conductivity increased by more than 7 times, the time to absorb hydrogen to 90% saturation capacity is shortened by 22% to 54% compared to traditional processes, and the effective hydrogen storage capacity, hydrogen absorption and desorption kinetics, and cycle life of the initial powdered hydrogen storage material are significantly improved.

The present disclosure provides a carbon-based porous material suitable for electrochemical carbon dioxide capture, a preparation method and application thereof, and belongs to the technical field of electrochemistry. The preparation method comprises: placing urea powder in a high-temperature tube furnace, and introducing nitrogen for 0.5-1.5 hours; pyrolyzing the urea powder under an argon atmosphere and at a preset temperature for 0.5-1.5 hours, and then obtaining a nitrogen-doped carbon-based porous material after cooling and grinding. The present disclosure adopts an in-situ synthesis method, uses urea as a nitrogen source and a carbon source precursor at the same time during the preparation process, and is treated at high temperature in an inert environment, thereby realizing one-step synthesis of a nitrogen-doped carbon material. The material has a large specific surface area and strong adsorption capacity, can effectively adsorb carbon dioxide gas molecules to the surface, and effectively improves the performance and use range of the carbon material in catalysis, adsorption, electrochemistry and the like.

The application relates to a method for connecting sapphire and porous Si3N4 ceramic by using gradient ZBS microcrystalline glass solder, and relates to a method for connecting sapphire and porous Si3N4 ceramic by using microcrystalline glass solder. The application aims to solve the problem of thermal stress caused by the excessively large difference in thermal expansion coefficient between sapphire and porous Si3N4 ceramic base materials. The application successfully realizes the effective connection of sapphire and porous Si3N4 ceramic under the condition of argon by using gradient thermal expansion microcrystalline glass solder, forms a composite gradient thermal expansion intermediate layer, the whole joint is dense, the solder is well combined with the two side base materials, a reaction layer is formed at the sapphire interface to realize excellent connection, an infiltration layer is formed at the porous Si3N4 ceramic side to realize excellent connection, and the overall joint has relatively excellent mechanical properties. After being heated to 760 DEG C under the argon atmosphere and kept for 30 min, the room-temperature mechanical properties of the joint reach 20.5 MPa.

This invention discloses a Ningdong coal-based hard carbon anode material, its preparation method, and its application, belonging to the technical field of sodium-ion battery anode materials. The invention uses Jurassic coal from Lingxin Mine, Hongliu Mine, Yangchangwan Mine, and Meihuajing Mine in Ningdong, Ningxia, as the core raw material. After washing, beneficiation, and crushing, the raw materials undergo deep acid washing and impurity removal using a hydrochloric acid and hydrofluoric acid composite system. The hard carbon anode material is then prepared through a complete process including two-stage carbonization under nitrogen protection, asphalt surface coating, and solid-state pre-sodiumization in an argon atmosphere. The finished product of this invention has an ash content ≤0.5wt%, an initial discharge capacity ≥320mAh / g, an initial coulombic efficiency ≥89%, and a capacity retention rate of no less than 80% after 5000 charge-discharge cycles. This invention solves the industry pain points of low initial coulombic efficiency of Indonesian coconut shell capacitor carbon and high impurities and poor performance of ordinary coal-based hard carbon. It features localized raw material supply, low production costs, and easy large-scale implementation of the process. It can be widely used in liquid and solid-state sodium-ion batteries and aligns with the industrial policy of integrating coal chemical industry and new energy development in Ningdong, possessing extremely high economic and promotional value.

This invention discloses a method for preparing nitrogen-doped carbon nanotubes (NCNTs) composite KVPO4F microspheres and their applications. The method involves: preparing a VOHPO4 / NCNTs composite precursor by reflux and self-assembly; reducing VOHPO4 / NCNTs in a hydrogen / argon atmosphere; ultrasonically dispersing the reduction product with KF in solution, evaporating the solvent to achieve uniform mixing; and calcining the mixture in an argon atmosphere to obtain the final product. This invention features a novel process, and the resulting KVPO4F / NCNTs material exhibits excellent electrochemical performance, making it a promising cathode material for potassium-ion batteries.

This invention relates to the field of gas separation membrane technology, specifically disclosing an in-situ amorphization-driven double-crosslinked hybrid matrix membrane, its preparation method, and its applications. The invention uses carboxyl-modified UiO-66-COOH as a filler, blended with carboxyl-functionalized polyimide casting solution, to prepare a non-crosslinked hybrid matrix membrane via solvent evaporation. This membrane is then subjected to high-temperature heat treatment under an argon atmosphere to achieve in-situ amorphization of MOF and the construction of polymer-polymer and polymer-MOF double-crosslinked networks. By controlling the MOF filler loading, this invention effectively eliminates filler agglomeration and interface defects. After heat treatment, the MOF crystallization peak disappears, forming an amorphous structure, and the double-crosslinked network significantly optimizes the membrane's free volume and micropore distribution. The resulting crosslinked hybrid matrix membrane exhibits excellent CO2 permeability and CO2 / N2 selectivity, showing promising industrial application prospects in CO2 separation scenarios such as flue gas and natural gas.

This invention discloses a fullerene-based (Mo2C-WC) / C 60 An electrocatalyst, its preparation method, and its application are disclosed. The electrocatalyst is composed of molybdenum oxide, tungsten oxide, and fullerene. The molar ratio of molybdenum atoms to tungsten atoms is (0.5~2):1, and the ratio of the sum of the molar numbers of molybdenum and tungsten atoms to the molar number of carbon atoms in the fullerene is 1:20. The preparation method includes the following steps: mixing fullerene, molybdenum oxide, and tungsten oxide to prepare a mixed precursor; calcining the mixed precursor at high temperature under an argon atmosphere to obtain a (molybdenum carbide-tungsten carbide) / fullerene carbon material; acid washing the (molybdenum carbide-tungsten carbide) / fullerene carbon material to remove the metal elements generated in the reaction; and finally drying to obtain a fullerene-based (Mo2C-WC) / C material. 60 Electrocatalyst. The electrocatalyst of this invention forms a unique W-Mo heterojunction with a large specific surface area and electrochemical active area, which exposes more active sites, thereby greatly enhancing the catalyst's ability to electrocatalyze hydrogen evolution.

The present application relates to gas adsorption material technical field, especially to Fe-Ce-Zr three metal MOFs derived carbon material and its preparation method and application, the preparation method of the present application takes iron nitrate, cerium nitrate, zirconium nitrate as metal source, phthalic acid as organic ligand, realizes the coordination assembly of metal ion and ligand through the solvothermal method, and prepares Fe-Ce-Zr three metal MOF;Again under argon atmosphere, with 10~12 ℃ / min heating rate, heat to 600~800 ℃, and bake 2~4h, make organic ligand in situ carbonization into porous carbon skeleton, and metal node converts into high dispersion metal oxide, finally obtains the Fe-Ce-Zr three metal MOFs derived carbon material with porous structure, multi-metal active site and carbon matrix.

This invention discloses a method for preparing high-frequency, low-loss Fe-Ni-Mo permalloy powder using an atomization and heat treatment process, relating to the field of soft magnetic functional materials technology. The invention includes the following steps: first, electrolytic iron, electrolytic nickel, molybdenum plate, ferroboron, silicon, and sponge yttrium are smelted to obtain an alloy liquid; then, the alloy liquid is atomized and solidified to form powder; the resulting atomized powder is cleaned and treated in an argon atmosphere at 600-620℃ for 30-40 minutes; subsequently, it is coated with Y-Al-F-O sol, followed by silica coating; finally, it is treated in an argon atmosphere at 380℃ for 30-40 minutes, and after sieving, high-frequency, low-loss Fe-Ni-Mo permalloy powder is obtained. This preparation method effectively improves the insulation resistance, high-frequency low-loss capability, and frequency stability of the permeability of the Fe-Ni-Mo permalloy powder.

This invention relates to the field of non-enzymatic glucose sensor technology, and particularly to a Ni-doped non-enzymatic glucose sensor, its preparation method, and its application. The method includes the following steps: cleaning and naturally drying a titanium wire, followed by constant-voltage deposition in a fluorine-containing electrolyte to obtain a Ti / TiO2 bilayer structure; annealing in air, followed by heating in an argon atmosphere, introducing a mixed atmosphere of hydrogen and a carbon source, holding at this temperature, stopping the gas introduction, and cooling to room temperature in an argon atmosphere to obtain a C / TiO2 / Ti multilayer structure; and finally, constant-voltage deposition in a nickel-containing mixed electrolyte to obtain the non-enzymatic glucose sensor. Using the above steps, the non-enzymatic glucose sensor obtained exhibits excellent catalytic activity for glucose oxidation in 0.1M NaOH solution, showing good linearity in the concentration range of 0.01–5.78 mM, with a sensitivity reaching 2624 μA·mM. ‑1 ·cm ‑2 The detection limit is approximately 0.5 μM, and the current response time is less than 2 s.

This application relates to a porous carbon material having a core-shell structure with an outer layer of graphite-like or graphitized layer and an inner layer of amorphous carbon. The asymmetry factor γ of the porous carbon material is 1 to 3, and the linewidth LW is 6 to 14. This application also relates to a method for preparing a porous carbon material for silicon-carbon anodes, comprising: thoroughly mixing a precursor carbide with a graphitized catalyst to obtain a precursor carbide / graphitized catalyst composite; heating the precursor carbide / graphitized catalyst composite to a temperature of 900 to 1200°C under an argon atmosphere in a direct-heating device via programmed control; optionally stopping the argon gas flow after heating; subsequently introducing chlorine gas for chlorination etching for 1 to 5 hours to obtain carbide-derived carbon powder; and treating the obtained carbide-derived carbon powder with a post-treatment gas after chlorination to obtain the porous carbon material.

The present application relates to a kind of diamond nanoparticles infiltrates the method for reinforcing hard alloy and the composite material made, belongs to hard alloy strengthening field.The method is first mixed, dry screen powder by ball milling under argon protection to WC, Co, VC powder, then preliminary WC-Co hard alloy sample is prepared by spark plasma sintering process.The key step is to uniformly coat nano diamond dispersion liquid after the surface of sintered sample is polished, and cover protection plate, be placed in the crucible covered with diamond powder, in argon atmosphere, stage heating to 1250 DEG C and heat preservation 3h are carried out heat treatment, so that diamond nanoparticles infiltrate matrix, finally by ultrasonic cleaning to remove residue.The method significantly improves the hardness of hard alloy, the sample after processing significantly increases the vickers hardness compared with untreated sample without reducing core fracture toughness, effectively enhances the wear resistance of material, process is simple and controllable, suitable for high stress working condition tool material.

This invention relates to a nanosecond laser creation and polishing method for periodic micro / nano composite structures on titanium alloy surfaces, belonging to the technical field of titanium alloy surface micro / nano composite structure preparation. The method includes the following steps: using a nanosecond laser to perform cross-scanning on the titanium alloy surface in a nitrogen atmosphere to obtain a micrometer-scale conical periodic structure, while simultaneously forming nanoscale particles on the surface of the microconical structure; the titanium alloy surface is simultaneously nitrided during the periodic micro / nano composite structure creation process; and the nanoparticles on the surface of the periodic micro / nano composite structure are removed by adjusting the focal position of the nanosecond laser in an argon atmosphere, resulting in a polished micrometer-scale conical periodic structure. The method provided by this invention effectively solves the problem of difficult processing of micro / nano composite structures on titanium alloy surfaces, significantly enhancing their wear resistance, corrosion resistance, optical effects, and biocompatibility, while also possessing advantages such as low cost, simple process, and high efficiency.

This invention provides a method for preparing ultra-high strength micro-nano multi-level carbon / silicon carbide porous ceramic aerogel, comprising: (1) mixing a single-molecule silicon source and a macromolecular cross-linked silicon source in a certain proportion to form a dual silicon source; (2) if the carbon source is liquid, mixing the carbon source and the dual silicon source to obtain a sol; or if the carbon source is solid, immersing the carbon source in the dual silicon source to obtain a carbon source filled with a dual silicon source sol; aging the sol or the carbon source gel filled with the dual silicon source sol; (3) replacing the solvent of the aged precursor and drying it; (4) sintering the dried precursor in an argon atmosphere at a temperature gradient to obtain a carbon / silicon carbide porous ceramic aerogel material. The silicon carbide porous ceramic aerogel has a micron-nano multi-level composite three-dimensional structure. Through the synergistic effect of the composite structure of "nanofiber riveting micron units", the brittleness problem is effectively solved, and stress is efficiently transferred and dispersed, thereby significantly improving the mechanical strength.

This invention belongs to the technical field of catalysts for alkaline water electrolysis, and discloses a heterogeneous electrocatalyst with a multiphase structure, its preparation method, and its application. The electrocatalyst is prepared by immersing pretreated nickel foam in a mixed solution and carrying out a hydrothermal reaction at 120-200°C to grow NiCo2O4 nanocones in situ on the nickel foam, denoted as NF@NiCo2O4. These nanocones are then immersed in an electrolyte, and CeO2 is deposited on the NF@NiCo2O4 using a constant current polarization method to obtain NF@NiCo2O4@CeO2. Finally, NF@NiCo2O4@CeO2-P-S is prepared by vapor deposition of a mixed powder of sulfur and NaH2PO2 with NF@NiCo2O4@CeO2 under an argon atmosphere at 200-400°C. The S and P co-doped NiCo2O4@CeO2 heterogeneous electrocatalyst of this invention can be used in the alkaline oxygen evolution reaction.

The invention discloses a synthesis method of a quinoxaline-2 (1H)-ketone derivative containing an SF5 group, which comprises the following specific synthesis steps: taking a quinoxaline-2 (1H)-ketone compound 1 and a styrene compound 2 as reaction raw materials, taking SF5Cl as a pentafluorosulfenyl reagent, taking a halogenated hydrocarbon solvent as a reaction solvent, and reacting under blue light irradiation and argon atmosphere to obtain the quinoxaline-2 (1H)-ketone derivative containing the SF5 group. The quinoxaline-2 (1H)-ketone derivative 3 containing the SF5 group is obtained. The method is simple to operate, mild in condition, good in functional group tolerance and high in yield, and the quinoxaline-2 (1H)-ketone derivative containing the SF5 group can be conveniently obtained.

The application discloses an explosive composition, a preparation method and a use method thereof, and belongs to the technical field of explosive preparation, wherein the explosive composition comprises the following raw materials in parts by mass: zirconium carbide powder 60-80 parts, and zirconium oxide powder 20-40 parts; the composition is placed in an inert gas atmosphere, heated to 150-200 DEG C, and an explosion reaction occurs. The zirconium carbide powder and the zirconium oxide powder are mixed according to a proportion, and an unexpected explosion reaction occurs at 150-200 DEG C in an inert gas (argon) atmosphere; on the basis, the application improves the preparation method of the solid powder of the explosive composition; furthermore, the application provides the use method of the explosive composition. The explosive composition has the advantages of simple preparation process, easy-to-control explosion reaction process, and independence from oxygen, and is suitable for fields such as mine exploitation.

The application relates to the technical field of battery positive electrode materials, in particular to a rigid-flexible adjustable triangular COF material and a preparation method and application thereof. The preparation method comprises the following steps: dissolving flexible unit material and rigid unit material in a mixed solvent of 1,2-dichlorobenzene and n-butanol according to a molar ratio of 9:1, adding acetic acid as a catalyst to obtain a mixed solution; transferring the mixed solution into a pressure-resistant reaction kettle, sealing, reacting at 120 DEG C, carrying out centrifugal treatment after the reaction is completed, and collecting the product; sequentially washing the centrifugal product with tetrahydrofuran, acetone and methanol, vacuum drying at 80 DEG C after the washing, and obtaining a powder-shaped CTP-COF; mixing the powder-shaped CTP-COF with sulfur powder according to a mass ratio of 1:2, melting and diffusing in a closed container under an argon atmosphere at 155 DEG C after the mixing, grinding the melted product after the cooling, and obtaining a triangular COF material. The application improves the performance of the battery by regulating the proportion of the rigid unit material and the flexible unit material in the COF skeleton.

The application belongs to the technical field of refractory materials, and particularly relates to a magnesium-based refractory material for a zinc-extraction rotary kiln and a preparation method thereof. The magnesium-based refractory material is composed of the following components in percentage by weight: magnesia-alumina spinel 10-16 wt%, modified alumina 6-11 wt%, silicon carbide 4-7 wt%, and composite binder 2-4 wt%, with the balance being magnesite. The modified alumina is prepared by the following process: adding aluminum chloride, gadolinium chloride and glucose into ethanol, heating and stirring, then adding alumina particles and ultrasonic dispersing, filtering and drying to obtain alumina particles coated with a precursor; and calcining the alumina particles coated with the precursor under an argon atmosphere to obtain the modified alumina. The magnesium-based refractory material has excellent normal-temperature mechanical properties and high-temperature mechanical properties, and good thermal shock resistance.