775 results about "Oxygen atmosphere" patented technology

The invention discloses an asphalt-based hard carbon negative electrode material for a sodium-ion battery and a preparation method of the asphalt-based hard carbon negative electrode material, and belongs to the technical field of negative electrode materials for sodium-ion batteries. The hard carbon negative electrode material is prepared from the following raw materials in parts by weight: 30-80 parts of asphalt, 10-30 parts of a cross-linking agent and N, N-dimethylformamide as a solvent. The preparation method comprises the following steps: S1, carrying out crushing, ball milling and sieving on the asphalt to obtain powder with the particle size of 10 [mu] m; s2, uniformly mixing the powder, N, N-dimethylformamide and a cross-linking agent to obtain a cross-linked substance; s3, carrying out pre-oxidation treatment on the cross-linked product in an oxygen atmosphere; and S4, performing high-temperature carbonization treatment on the low-temperature pre-oxidized cross-linked product in an inert atmosphere to obtain the asphalt-based hard carbon material. The organic cross-linking agent is introduced to initiate oxidation cross-linking of the asphalt, so that the asphalt is converted into a thermosetting precursor from a thermoplastic precursor, and the high-performance asphalt-based hard carbon material for the sodium-ion battery is prepared.

The invention provides a preparation method of a multi-element doped asphalt-based hard carbon material for a negative electrode of a sodium-ion battery, which comprises the following steps: (S1) mixing and crushing asphalt and zinc salt of organic acid, and pre-oxidizing in an oxygen-containing atmosphere to obtain pre-oxidized asphalt particles; (S2) uniformly mixing the pre-oxidized asphalt particles, N-containing aromatic polyaldehyde and 1-hydroxyethylidene-1, 1-diphosphonic acid, and carrying out heating reaction in an inert atmosphere to obtain modified asphalt particles; and (S3) carrying out high-temperature carbonization on the modified asphalt particles in an inert atmosphere to obtain the multi-element doped asphalt-based hard carbon material. Firstly, an asphalt precursor and organic acid zinc are mixed and then pre-oxidized, then a cross-linking agent containing N and a cross-linking agent containing P are added for cross-linking, the obtained hard carbon material has a short-range ordered structure, and the sodium storage capacity and the sodium ion transmission capacity are both improved. The hard carbon material obtained by the preparation method has high specific capacity and first coulombic efficiency, and the rate capability is also improved.

The invention discloses an aluminum electrolytic capacitor powder stacking sintered foil and a preparation method thereof, and belongs to the technical field of aluminum electrolytic capacitors. The preparation method of the aluminum electrolytic capacitor powder stacking sintered foil comprises the steps that aluminum powder and a dielectric substance precursor serve as raw materials, a dielectric substance is deposited on the surface of the aluminum powder through a chemical vapor deposition method, and the aluminum powder wrapped by the dielectric substance is obtained; the dielectric constant of the dielectric substance is greater than that of aluminum oxide; the method comprises the following steps: uniformly mixing aluminum powder wrapped by a dielectric substance, a binder and a solvent, coating an aluminum foil substrate with the mixture, drying, degreasing at 350-550 DEG C in an oxygen-containing atmosphere, sintering at 600-670 DEG C in an oxygen-free state, and energizing after sintering to obtain the aluminum electrolytic capacitor powder stacked sintered foil. According to the aluminum electrolytic capacitor powder stacking sintering foil prepared by the method, the aluminum electrolytic capacitor powder stacking sintering anode foil per unit area has excellent electrostatic capacity.

The invention discloses a metal self-dispersed low-carbon alkane dehydrogenation catalyst as well as a preparation method and application thereof. The catalyst is composed of a molecular sieve carrier, metal particles of main active components Ru, Rh, Pd, Ir, Pt and Au, auxiliary components Fe, Co, Ni, Cu, Zn, Ga, In, Ge, Sn, Mn, Zr, V, Cr, Ti, Nb, Mo, Y, W, Pb, Sc, Bi, Sb, La and Ce, and alkali metal components Na, Mg, K, Ca and Cs. Firstly, the synthesized molecular sieve is subjected to high-temperature activation heat treatment, so that rich defect sites are generated; and mixing the activated molecular sieve with metal particles, and finally carrying out high-temperature treatment on the mixture in an oxygen atmosphere to prepare the stable molecular sieve loaded metal cluster. The obtained catalyst shows excellent catalytic activity and regeneration performance. The active metal particles are used as raw materials, the step of converting metal particle powder into salt is reduced, a physical mixing method is adopted, the preparation process of the catalyst is simpler, and the economic cost is lower.

The invention relates to the technical field of electro-catalysis oxygen evolution, and particularly discloses a nickel-molybdenum foam composite oxygen evolution electro-catalysis material with high-valence nickel induced by molybdate radicals and a preparation method of the nickel-molybdenum foam composite oxygen evolution electro-catalysis material aiming at the problem that an existing oxygen evolution electro-catalysis material is insufficient in comprehensive performance or poor in performance stability. Soaking in a NaCl aqueous solution, and taking out; s2, mixing the nickel-molybdenum alloy foam with a K3 [Fe (CN) 6] aqueous solution, heating, and carrying out a hydrothermal reaction; and S3, finally, the nickel-molybdenum alloy foam is placed in the air or oxygen atmosphere and heated to 350-450 DEG C, heat preservation treatment is conducted for 2 h, and the nickel-molybdenum foam composite oxygen evolution electro-catalysis material is obtained. Molybdate anions are adopted as a sustainable induction source to be coupled with a NixOy / Fe3O4 heterogeneous interface, integrated construction is achieved on a nickel-molybdenum foam framework, and the nickel-molybdenum foam composite material has the advantages of being low in overpotential, high in stability, high in activity, high in binding force and long-term in durability and meanwhile being simple in process, easy to amplify on a large scale and the like.

The invention provides a method for preparing a spinel type catalyst rich in oxygen vacancies under the assistance of magnetization treatment and application of the spinel type catalyst. The synthesis method of the catalyst comprises the following steps: (1) preparing a precursor of the catalyst by adopting a hydrothermal method: putting a metal foam carrier into a mixed solution of metal salt ions such as ferric nitrate, manganous nitrate and cobalt nitrate, adding ammonium fluoride and urea, carrying out hydrothermal reaction, repeating the hydrothermal reaction for several times, and washing and drying to obtain the precursor; and (2) putting the catalyst precursor into a magnetization reactor, putting the magnetization reactor in the center of an alternating magnetic field coil, and carrying out magnetization treatment on the catalyst precursor in an air or oxygen atmosphere to obtain the spinel type catalyst rich in oxygen vacancies. The method is simple in process and low in cost, and the obtained product is uniform in morphology and good in repeatability and has high photo-thermal catalytic oxidation toluene performance. Through a clean, pollution-free and in-situ directional heating electromagnetic induction auxiliary technology, removal of oxygen atoms on the surface of the spinel catalyst is promoted, so that rich oxygen vacancies are introduced into cobalt-manganese spinel, the exchange effect between the catalyst and oxygen molecules is accelerated, and the reaction rate of catalytic oxidation of VOCs is promoted. When the intensity of simulated sunlight is 500 cm <-2 >, the concentration of toluene is 1000 ppm, the air speed is 45000 mL.gcat <-1 >. H <-1 >, the conversion rate of toluene reaches 86% or above, and high-efficiency oxidation of toluene can be realized under the driving of the simulated sunlight.

The invention discloses a preparation method for directly preparing 2, 5-furandicarboxaldehyde from a carbohydrate, and the preparation method comprises the following steps: reacting a mixture I containing the carbohydrate, a catalyst, an organic phase solvent and a water phase solution in an oxygen-containing atmosphere to obtain the 2, 5-furandicarboxaldehyde, the catalyst comprises a component I and a component II; the component I is selected from at least one of aluminum chloride, indium chloride and chromium chloride; and the component II is an organic hydrophobic modified manganese oxide. According to the method, a 5-hydroxymethylfurfural intermediate product generated by reaction is directly oxidized without separation to prepare 2, 5-furandicarboxaldehyde, so that side reactions such as polymerization and the like are reduced; the carbohydrates are dissolved in the water phase and cannot be catalyzed and oxidized by the hydrophobic oxidation catalyst dispersed in the organic phase to generate byproducts, and the method has the advantages of low cost, mild reaction conditions, high product yield and the like.

The invention relates to a method for preparing a hard carbon material from carbon dot heterogeneous cross-linked bituminous coal, a coal-based hard carbon material and application. The preparation method comprises the following steps: (1) soaking pretreated bituminous coal in an acid solution, washing to be neutral, and drying to obtain dry pulverized coal; (2) dispersing the carbon dots in an alcohol solvent for ultrasonic treatment to obtain a dispersion liquid; (3) mixing the dried pulverized coal obtained in the step (1) and the dispersion liquid obtained in the step (2), mechanically stirring, and drying to obtain a mixture; (4) performing low-temperature heating crosslinking on the mixture obtained in the step (3) in an oxygen-containing atmosphere so as to obtain a heterogeneous crosslinking product; and (5) performing high-temperature carbonization on the heterogeneous cross-linked product in an inert atmosphere to obtain the coal-based hard carbon material. The coal-based hard carbon material can be used as a sodium ion battery / potassium ion battery negative electrode, and has excellent sodium / potassium storage performance.

The invention relates to the technical field of nano powder material preparation, in particular to a method for preparing molybdenum powder based on a spray granulation precursor and the molybdenum powder. The method for preparing the molybdenum powder comprises the steps that ammonium molybdate and a pore forming agent are dissolved in ultrapure water at the room temperature, and mixed slurry is obtained; carrying out spray granulation treatment on the mixed slurry to obtain composite powder particles containing the pore-forming agent and ammonium molybdate; the composite powder particles are placed in an oxygen-containing atmosphere to be roasted, and superfine nano molybdenum trioxide is obtained; placing the superfine nano molybdenum trioxide in a hydrogen atmosphere for primary reduction treatment to obtain superfine molybdenum dioxide powder; and the superfine molybdenum dioxide powder is subjected to second-stage reduction treatment, the superfine molybdenum powder is obtained, and the reduction conditions of the first-stage reduction treatment and the second-stage reduction treatment are different. According to the preparation method, the superfine molybdenum powder with good uniformity and dispersity can be prepared.

The invention discloses a method for separating and recycling a silver-copper composite material through selective interface oxidation. The method comprises the following steps that the material is crushed and sheared, and a crushed material is obtained; the crushed material is pretreated and then fed into an oxidation fluidized bed, an internal oxidation reaction is conducted in a gas phase at the temperature of 400-700 DEG C and the oxygen pressure of 0.2-0.6 MPa, the reaction time is 20-60 h, and a high-temperature material is obtained; quenching the high-temperature material to generate stress cracks on an oxidation interface to obtain a cooled material; and stripping the cooled material under the mechanical action to obtain a recycled copper material and a recycled silver material, oxidizing the electrical contact material or leftover materials of the electrical contact material in the oxygen atmosphere to oxidize an interface between the silver-copper composite materials to form an oxidation film, separating the two materials of the silver-copper composite materials under the quenching and mechanical actions, and then, obtaining the recycled copper material and the recycled silver material. The method is high in recovery rate, high in recovery purity and environment-friendly.

The invention belongs to the field of positive electrode materials, and particularly relates to a method for preparing a lithium iron phosphate C composite material by combining double spraying, which comprises the following steps: carrying out spray pyrolysis treatment on slurry of a lithium source, an iron source and a phosphorus source to obtain a transformed activated precursor; wherein the atmosphere in the spray pyrolysis stage is an oxygen-containing atmosphere, and the temperature is 600-900 DEG C; and carrying out composite pulpifying on the transformed and activated precursor and a carbon source, and then carrying out spray drying and heat treatment to prepare the lithium iron phosphate C composite material. The invention also discloses the material prepared by the preparation method and application thereof. The method can be based on a brand new process, anion residues are reduced, and the phase and distribution uniformity of elements are improved, so that the electrochemical performance, especially the low-temperature performance, of the material can be remarkably improved.

The invention relates to the technical field of nano powder material preparation, in particular to a method for preparing molybdenum powder with controllable granularity and the molybdenum powder. The method for preparing the molybdenum powder with the controllable granularity comprises the steps that molybdenum salt and a pore forming agent are dissolved in water at the room temperature, and a mixed solution is obtained; drying the mixed solution to obtain a nano mixture of molybdenum salt coated with a pore-forming agent; roasting the nano mixture in an oxygen-containing atmosphere to obtain superfine molybdenum trioxide powder; the molybdenum trioxide powder is subjected to first-stage hydrogen reduction treatment, and superfine molybdenum dioxide powder without preferred orientation is obtained by adjusting the hydrogen dew point and the temperature field in the reduction process; and carrying out two-stage hydrogen reduction treatment on the superfine molybdenum dioxide powder to obtain molybdenum powder, and grinding and dispersing the molybdenum powder to obtain the superfine molybdenum powder. According to the preparation method, the superfine molybdenum powder with good uniformity and dispersity and controllable granularity can be prepared.

The invention belongs to the technical field of new energy battery materials, and particularly relates to coated asphalt for a negative electrode of a new energy battery as well as a preparation method and application of the coated asphalt. The method comprises the following steps: mixing an ethylene tar raw material and a cross-linking agent, and carrying out a first hydroxide cross-linking reaction in an oxygen-containing atmosphere to obtain a reaction liquid after the first hydroxide cross-linking reaction; transferring the reaction liquid after the first hydroxide cross-linking reaction into a protective gas atmosphere, and carrying out a second hydroxide cross-linking reaction to obtain a reaction liquid after a second hydroxide cross-linking reaction; and cooling the reaction liquid after the second hydroxide cross-linking reaction to room temperature, and performing liquid phase volatilization, so that the obtained coated asphalt has the characteristics of high softening point, low quinoline insoluble content, low coating thickness, high integrity, high compactness and high yield, is easy to realize industrial application, and can solve the recycling problem of ethylene tar.

The invention relates to a ternary positive electrode material with a core-shell structure and a preparation method and application thereof, and the method comprises the following steps: S1, mixing a lithium source with a nickel-cobalt-manganese hydroxide ternary precursor, and carrying out first heat treatment on the obtained mixture in a first oxygen-containing atmosphere to obtain a first material; s2, enabling the first material to be in contact with a solution containing ammonium salt, performing impregnation, and performing second heat treatment on an obtained solid in a second oxygen-containing atmosphere; the temperature of the first heat treatment is lower than that of the second heat treatment. The ternary positive electrode material prepared by adopting the method disclosed by the invention is relatively low in residual alkali content, and relatively good thermal stability and electrochemical performance can be obtained when the ternary positive electrode material is used as a positive electrode material of a lithium ion battery.

The invention relates to a method for recycling polyethylene plastic through catalytic oxidation cracking, and belongs to the technical field of plastic recycling. The method comprises the following steps: mixing a Co / Al2O3 catalyst, polyethylene plastic and water, and carrying out a catalytic reaction in an oxygen-containing atmosphere at a set temperature, so that the polyethylene plastic is converted into binary acid, thereby obtaining a reaction solution. The low-price Co / Al2O3 catalyst is applied to catalytic oxidation cracking of the polyethylene plastic, the polyethylene plastic is converted into the binary acid, the yield of the binary acid is stabilized at 70% or above and reaches 115% at most, and the Co / Al2O3 catalyst is low in price and low in cost. The low-cost and low-energy-consumption improvement of the yield of the binary acid converted from the polyethylene plastic through catalytic oxidation cracking is fully realized, and a new way is provided for the high-value conversion of the polyethylene plastic.

The invention provides a method for manufacturing a terbium-dysprosium-iron giant magnetostrictive alloy based on three-dimensional photocuring molding, which comprises the following steps of: firstly, preparing three-dimensional photocuring molding slurry, adopting photosensitive resin as a matrix, and matching with a metal organic chelating agent containing terbium-dysprosium-iron giant magnetostrictive alloy component to enhance the uniform distribution of metal powder so as to ensure the printing precision and the material stability; secondly, the resin and the chelating agent are removed through heat treatment degreasing, the degreasing process is controlled by controlling the heating rate, and structural collapse is avoided; decarburization is carried out in a low-oxygen atmosphere, so that the purity of the alloy is improved, and the structural integrity before sintering is ensured; then reduction treatment is performed to improve the structural stability and purity; and finally, high-temperature sintering is carried out under the assistance of a magnetic field, grain orientation and magnetic domain arrangement are optimized, and the magnetostrictive effect and the force-magnetic energy conversion efficiency are improved. According to the method, three-dimensional light curing forming and magnetic field auxiliary heat treatment are combined, and the risk of structural damage in the printing process of the terbium dysprosium iron giant magnetostrictive alloy is practically and effectively avoided.

The invention discloses iridium-cobalt oxide nanoparticles as well as a preparation method and application thereof. The iridium-cobalt oxide nanoparticles comprise a cobaltosic oxide carrier and supported iridium oxide. The preparation method comprises the following steps: 1) preparing an iridium salt-cobalt salt aqueous solution; 2) preparing a reaction solution of a complex containing iridium ammonium salt and cobalt; (3) preparing an iridium hydroxide-cobalt complex compound; and 4) grinding the iridium hydroxide-cobalt complex compound, placing the ground complex compound in an oxygen-containing atmosphere for heat treatment, and then carrying out water washing and drying. The iridium-cobalt oxide nano-particles are low in iridium content, small and uniform in particle size and simple in preparation method, have the advantages of being high in electrochemical activity, good in electrochemical stability and the like when being used as an OER reaction catalyst, and are suitable for large-scale industrial application in the field of hydrogen production through water electrolysis.

The invention provides a sodium ion battery negative electrode hard carbon material and a preparation method and application thereof, and the preparation method comprises the following steps: carbonizing a co-pre-oxidation raw material in an oxygen-containing atmosphere, mixing the carbonized co-pre-oxidation raw material with starch to form a mixed raw material, carrying out first-stage heat treatment in air, and carrying out second-stage heat treatment in a protective atmosphere to obtain the sodium ion battery negative electrode hard carbon material. Wherein the co-pre-oxidation raw material is any one or a mixture of more of biomass and carbonized raw materials. According to the preparation method, the thermal stability of starch pre-carbonization is effectively improved, the effect of inhibiting expansion of starch is achieved, and the problems of low structural damage capacity and the like caused by expansion due to the characteristics of starch raw materials are solved.

The invention provides sintering flue gas denitration activated carbon and a preparation method thereof.The preparation method comprises the steps that coal-based activated carbon raw material powder and an aqueous solution of a nitrogen-containing compound and a phosphorus-containing compound are evenly mixed, impregnated and dried, and a nitrogen-phosphorus co-doped precursor is obtained; blending the catalytic components to obtain raw material strips; primarily forming pores, and activating for the first time in a water vapor atmosphere; carrying out secondary loading and pore regulation, and carrying out secondary activation to obtain a secondary carbon body; and carrying out heat treatment on the secondary carbon body in an oxygen-containing atmosphere to convert the loaded metal precursor into a metal oxide. According to the invention, through a cascade catalytic network constructed by nitrogen and phosphorus doping and titanium, tungsten and vanadium oxides and an optimized pore channel formed by step-by-step activation of water vapor and carbon dioxide, the denitration efficiency of the catalyst breaks through 80% and is far higher than that of common activated carbon. The sintering flue gas denitration system has high activity and high stability, can greatly reduce the series number of denitration towers, obviously reduces the system resistance and operation energy consumption, and provides an efficient scheme for solving the problems of low sintering flue gas denitration efficiency and high cost.

The invention belongs to the field of battery materials, and particularly relates to a regenerated graphite fast charging material and preparation and application thereof.The preparation method comprises the steps that waste graphite is subjected to first-stage plasma treatment in an oxygen-containing atmosphere in advance and then subjected to second-stage plasma treatment in an ammonia-containing atmosphere, and first-stage modified graphite is obtained; performing ultrasonic treatment on the first-stage modified graphite in a modification liquid containing an N modifier to obtain second-stage modified graphite; performing first-stage polymerization on the second-stage modified graphite in a solution A containing a monomer 1 in a formula 1 and an initiator in advance, and then performing second-stage polymerization on the second-stage modified graphite in a solution B containing a monomer 2 and an oxidizing agent to prepare the regenerated graphite quick-charging material, the monomer 2 comprises at least one of a formula 2 and a formula 3. The method provided by the invention can strengthen ion and electron conduction pathways of the regenerated material, improve the transmission rate, remarkably strengthen the fast charging performance of the material, and further strengthen the stability and low-temperature performance of the material.

The embodiment of the invention provides a method for manufacturing foam glass by recovering glass fibers from waste fan blades. The method comprises the following steps: pyrolyzing the waste fan blades in an inert atmosphere; calcining the pyrolysis product of the waste fan blade in an oxygen-containing atmosphere to obtain regenerated glass fiber; carrying out grinding treatment on the obtained regenerated glass fiber; mixing the ground regenerated glass fiber powder with a foaming agent, a foam stabilizer and a binding agent, and performing compression molding to obtain a prefabricated blank; and sintering, foaming and annealing the prefabricated blank in sequence to obtain the foamed glass. The recycling of the fan blade reduces the waste of a landfill, realizes the recycling of the glass fiber, reduces the demand on raw materials, creates a new economic growth point by using the waste glass fiber for developing the foam glass market, and realizes the high-valued utilization of the recycled glass fiber.

The invention discloses a method for preparing a ternary positive electrode composite material. The method comprises the following steps: sintering a ternary positive electrode material precursor and a lithium source in an oxygen atmosphere to obtain a ternary positive electrode material; and introducing mixed gas of acid gas and oxygen into the ternary positive electrode material under the condition that the temperature does not exceed 900 DEG C to obtain the ternary positive electrode composite material. By adopting the technical scheme, on one hand, overgrowth or abnormal growth of crystal grains caused by overhigh temperature can be prevented; on the other hand, the residual alkali on the surface is effectively removed and is converted into inorganic salt with more stable thermodynamics, and the surface of the ternary positive electrode material is coated with the inorganic salt layer, so that the interface stability and the cycling stability of the material can be remarkably improved, and the resource utilization of wastes is also realized. The invention also discloses the ternary positive electrode composite material. The ternary positive electrode composite material is prepared by adopting the preparation method. The invention also discloses a lithium battery and a ternary positive electrode composite material.

The present invention belongs to the field of carbon-based composite materials, and particularly relates to a preparation method of a biomass-starch composite-based hard carbon material, which is obtained by pre-treating biomass under a low-oxygen atmosphere to obtain a heat-treated material, and then compounding the heat-treated material with starch and performing a roasting treatment; in the heat treatment stage, the oxygen partial pressure in the low-oxygen atmosphere is 1-15 v%, and the heat treatment temperature is 300-600 °C. The present invention also includes the material obtained by the above preparation method and its application in sodium batteries. The process of the present invention can solve the problem of starch thermal expansion, construct special physical and chemical structural characteristics, and can also improve the interfacial compatibility of carbons from different sources, thereby synergistically improving the sodium battery electrochemical performance of the material.

The invention provides a YBCO (Yttrium Barium Copper Oxide) film for a single-photon detector and a deposition method thereof, and the deposition method comprises the following steps: S1, fixing a substrate on a substrate table of pulse laser deposition equipment, vacuumizing, and heating the substrate table to a deposition temperature; s2, oxygen is introduced into the deposition cavity until the oxygen pressure ranges from 0.25 Torr to 0.35 Torr; s3, adopting a YBCO target material, and carrying out pre-sputtering in a baffle closing state; s4, a baffle is opened, sputtering is conducted on the YBCO target material, and a YBCO film precursor is obtained; s5, oxygen is introduced into the deposition cavity, and meanwhile, the annealing temperature is reduced for in-situ annealing treatment; and S6, cooling to room temperature to obtain the YBCO film. According to the method, the high-quality ultrathin YBCO film with the thickness as low as 14 nm is prepared by accurately controlling the deposition parameters and the annealing process of the oxygen atmosphere, the prepared YBCO film still keeps excellent superconducting performance under the ultrathin condition, and the refrigeration cost is greatly reduced.

The invention discloses a radioactive waste resin pyrolysis catalyst composition and a radioactive waste resin pyrolysis treatment method, and belongs to the technical field of radioactive waste resin treatment. The radioactive waste resin pyrolysis catalyst composition provided by the invention comprises 8-12wt% of hydrated copper salt, 52-55wt% of kaolin, 25-30wt% of sodium hydroxide and 9-12wt% of sodium chloride. The radioactive waste resin pyrolysis catalyst composition and radioactive waste resin are uniformly mixed and then fed into a pyrolysis reaction unit, the temperature is raised to 200-300 DEG C in an oxygen-containing atmosphere for a pyrolysis reaction, and waste resin residues after pyrolysis treatment are obtained. The radioactive waste resin pyrolysis catalyst composition and the radioactive waste resin pyrolysis treatment method can realize fixation of radionuclides at a low temperature, and the radioactive waste resin pyrolysis catalyst composition and the radioactive waste resin pyrolysis treatment method provided by the invention are low in cost.

The invention belongs to the technical field of preparation of soft magnetic composite materials, and particularly relates to an insulation coating method and application of a soft magnetic powder material. The insulating coating method comprises the following steps: (1) uniformly mixing low-melting-point metal or alloy powder with silica sol, a silane coupling agent and a thermocuring resin glue solution to obtain coating slurry; and (2) uniformly mixing soft magnetic powder with the coating slurry obtained in the step (1), firstly performing hot-pressing curing molding at the temperature of 60-100 DEG C under a vacuum condition, and then performing hot-pressing sintering treatment at the temperature higher than the melting point temperature of low-melting-point metal or alloy powder and under an oxygen-containing atmosphere condition to obtain the insulated and coated soft magnetic powder material. According to the insulating coating method, the advantages of an organic material insulating coating method and an inorganic material insulating coating method are combined, the defects of the organic material insulating coating method and the inorganic material insulating coating method are overcome, and the stability and the insulating coating effect of the insulating coating layer are remarkably improved.

The invention discloses a metal oxide precursor and a preparation method and application thereof. The precursor comprises a nickel element, a manganese element and an element M, and the element M comprises one or more of cobalt and aluminum. The preparation method comprises the steps that a mixed metal salt solution with the total metal ion concentration being 2-5 mol / L is prepared; spraying the mixed metal salt solution into a high-temperature pyrolyzing furnace in an aerial fog form, and carrying out a spray pyrolysis reaction; roasting the spray pyrolysis product for 1-4 hours in an oxygen-containing atmosphere, wherein the roasting temperature is 500-700 DEG C; dispersing the roasted product in an acidic aqueous solution, carrying out hydrothermal reaction at 150-250 DEG C for 1-6 hours, and carrying out filter pressing and washing until the conductivity of filtrate is less than 50 [mu] S / cm; and drying the washed product, and carrying out air jet pulverization to obtain the metal oxide precursor. During application, the metal oxide precursor and a lithium source are mixed and sintered to prepare the ternary positive electrode material. Impurities are removed through low-temperature roasting-acidic hydrothermal combination, the structure is optimized, and the performance of the positive electrode is improved.

To provide a method for evaluating the degree of oxidation of an oxidized polymer material.SOLUTION: When a standard piece made of a non-oxidized polymer material is measured by a chemiluminescence method while being heated in an oxygen-containing atmosphere to obtain a first integrated emission amount A, and a specimen made of the oxidized polymer material is measured by the chemiluminescence method while being heated in an oxygen-containing atmosphere to obtain a second integrated emission amount B, the degree of oxidation of the specimen is evaluated on the basis of an emission change rate R=(A-B) / A.SELECTED DRAWING: None

The utility model provides refrigeration equipment. The oxygen adjusting device comprises an oxygen adjusting storage container and an electrolysis oxygen adjusting module, the oxygen adjusting module is arranged in the oxygen adjusting container so that the oxygen-rich atmosphere or the oxygen-poor atmosphere can be supplied to the oxygen adjusting container, the oxygen adjusting container comprises a first oxygen adjusting container body and a second oxygen adjusting container body, the first oxygen adjusting container body is arranged in the second oxygen adjusting container body, and the electrolysis oxygen adjusting module is arranged in the second oxygen adjusting container body. Or the second oxygen adjusting container is arranged in the first oxygen adjusting container. By means of the arrangement, the concentration of oxygen in the oxygen adjusting container can be adjusted, and meanwhile the equipment structure is more compact.

The invention discloses a non-noble metal ORR catalyst and a preparation method thereof, and belongs to the technical field of electro-catalysis. The method comprises the following steps: (1) adding 5, 10, 15, 20-tetra (4-cyanophenyl) porphyrin and nickel salt into an organic solvent, and synthesizing a supramolecular crystal precursor UPC-S7 through solvothermal reaction; (2) carbonizing the supramolecular crystal precursor UPC-S7 in an inert atmosphere to obtain a Ni-coated NC material; (3) oxidizing the Ni-coated NC material in an oxygen-containing atmosphere to obtain a Ni / NiO-coated NC material; and (4) sequentially soaking and etching the Ni / NiO-coated NC material by using a nitric acid solution and an ammonia water solution, and then washing and drying to obtain the non-noble metal ORR catalyst. The prepared catalyst does not contain precious metal such as platinum, the raw material cost is remarkably reduced on the basis of ensuring the ORR activity and stability of the catalyst, and a new scheme is provided for solving the cost bottleneck of a fuel cell.