316 results about "Molybdenum trioxide" patented technology

The invention relates to the technical field of chemical reactions, and particularly discloses a reaction device and method for preparing high-purity molybdenum trioxide, and the reaction device for preparing high-purity molybdenum trioxide comprises a reaction kettle; the filter bag is arranged in the reaction kettle; the lifting column is arranged in the discharging sleeve in a lifting and sleeving manner; the lifting driving part is arranged at the upper end of the reaction kettle and is used for driving the lifting column to do lifting motion; the spoiler is movably arranged on the lifting column and located in the bag body; the bag body shakes up and down to effectively promote mixing of reaction solutions in the vertical direction and enhance the hierarchical fluidity of the solutions, meanwhile, the spoiler pushes the reaction solution in the center to the periphery and gathers the peripheral solutions to the center to form effective radial mixing, radial flow mixing of the reaction solutions is achieved, and the reaction effect is improved. Any possible local concentration gradient can be broken, uniform distribution of reactants in the whole reaction kettle is ensured, sufficient mixing of a reaction solution is ensured, and the product purity is effectively improved.

The invention relates to the technical field of hydrometallurgy, and particularly discloses preparation methods of ultralow-potassium ammonium molybdate and ultralow-potassium derivatives thereof. The preparation method of the ultralow-potassium ammonium molybdate comprises the following steps that S1, roasted molybdenum concentrate is subjected to primary screening, smashing and re-screening, and a raw material is obtained; s2, adding the raw materials and pure water into a reaction kettle, uniformly mixing, adding an acid solution, adjusting the pH value, introducing compressed air, heating, adjusting the pressure in the kettle, cooling and depressurizing, washing, and carrying out solid-liquid separation to obtain hydrated molybdenum trioxide; s3, mixing molybdenum trioxide hydrate with an ammonia water solution, adding ammonium sulfide, mixing for 1-2 hours, carrying out solid-liquid separation, then adding an adsorbent, mixing for 1-2 hours, cooling, aging for 24-48 hours, and carrying out solid-liquid separation to obtain an ammonium molybdate solution; and S4, concentrating the ammonium molybdate solution according to the specific gravity, and then carrying out cooling crystallization, solid-liquid separation, washing and drying to obtain the ultralow-potassium ammonium molybdate. The ammonium molybdate and the derivatives thereof prepared by the invention have relatively low content of potassium.

The invention relates to the technical field of composite materials, in particular to a heat and sound insulation PVB intermediate film and a preparation method thereof. The problem that a PVB intermediate film is insufficient in heat insulation and aging resistance is solved. The preparation method comprises the following steps: pre-plasticizing PVB resin, shearing and mixing the pre-plasticized PVB resin and silane coupling agent modified enhanced nano cellulose, sequentially adding additives such as a plasticizer, molybdenum trioxide loaded lanthanum hexaboride, a composite light stabilizer and modified cerium oxide, and carrying out tape casting and hot pressing treatment to obtain the PVB intermediate film. Wherein the modified lanthanum hexaboride enhances infrared ray shielding, the composite light stabilizer and the modified cerium oxide synergistically improve the aging resistance, all the components are subjected to substance cooperation and process cooperation, comprehensive improvement of heat insulation, sound insulation and aging resistance of the PVB intermediate film is achieved, and the PVB intermediate film is suitable for the field of high-strength building glass.

The invention relates to the technical field of nano material preparation, and provides a molybdenum powder preparation method and molybdenum powder.The molybdenum powder preparation method comprises the steps that original molybdenum trioxide is subjected to thermal shock treatment, and treated molybdenum trioxide is obtained; the defect of the treated molybdenum trioxide is higher than that of the original molybdenum trioxide; adding the treated molybdenum trioxide and a water-soluble carbon source into a solvent, and carrying out ultrasonic dispersion and ball milling treatment to obtain mixed slurry; dehydrating and drying the mixed slurry to obtain precursor powder of organic carbon coated molybdenum trioxide; performing inert atmosphere reduction treatment on the precursor powder to obtain molybdenum dioxide; carrying out gas reduction deoxidation treatment on the molybdenum dioxide to obtain molybdenum powder; and the particle size of the molybdenum powder is nanoscale. The method disclosed by the invention can be used for preparing the nano molybdenum powder with narrow particle size distribution.

The invention discloses a supported iron-molybdenum catalyst for formaldehyde production and a preparation method and application thereof, and belongs to the field of catalysts.The catalyst comprises a core-shell structure, the core of the catalyst is a carrier, molybdenum trioxide is supported on the carrier, and the shell of the catalyst is iron molybdate. The carrier is selected from at least one of silicon dioxide, aluminum oxide, titanium oxide, magnesium oxide, magnesium silicate, a molecular sieve, white carbon black and hydroxyapatite; the preparation method comprises the following steps: firstly, loading molybdenum trioxide on a carrier, then dispersing the carrier in deionized water, dropwise adding a molybdenum source solution and an iron source solution in a parallel flow manner under stirring to perform deposition loading of iron molybdate, and performing aging, drying, forming and calcining to obtain the catalyst. The catalyst is used for preparing formaldehyde by oxidizing methanol, dimethyl ether and methylal; according to the catalyst disclosed by the invention, the raw material cost and the pollutant treatment capacity are obviously reduced due to the reduction of the dosage of molybdenum and iron components, and the catalyst has relatively good activity and stability.

The invention belongs to the technical field of wave-absorbing materials, and particularly relates to a monatomic modified carbon composite wave-absorbing material and a preparation method thereof. The method specifically comprises the following steps: S1, uniformly dispersing a pyrrole monomer and molybdenum trioxide hydride by using a solvent, and reacting at room temperature for 3-6 hours to obtain an HM-PPy compound; s2, adding metalloporphyrin and thionyl chloride into N, N-dimethylformamide, uniformly mixing, and then adding 4-dimethylaminopyridine to obtain a raw material solution; s3, dispersing the HM-PPy compound into a N, N-dimethylformamide solution containing triethylamine, so as to obtain a turbid liquid; s4, dropwise adding the raw material solution into the turbid liquid, and stirring and reacting at room temperature for 20-25 hours to obtain HM-PPy-MPor; and S5, carrying out pyrolysis on the HM (at) PPy-MPor to obtain the monatomic modified carbon composite wave-absorbing material.

The invention discloses a wafer-level single-layer MoS2 continuous film and an APCVD film forming method and application thereof.The wafer-level single-layer MoS2 continuous film is obtained by adopting a pipe-in-pipe APCVD tubular furnace, and conducting in-situ annealing on a C-A face sapphire substrate in the mixed atmosphere of oxygen and argon before the MoS2 continuous film grows; then the sulfur powder and the C-A surface sapphire substrate are heated at the same time in the mixed atmosphere of argon and hydrogen, the molybdenum trioxide powder is heated at the same time in the argon atmosphere, the wafer-level MoS2 continuous thin film of a single-layer structure is successfully prepared, and the technical problem that in the prior art, the wafer-level single-layer MoS2 thin film prepared through an APCVD method is discontinuous is solved. The wafer-level single-layer MoS2 continuous film prepared by the method has the characteristics of high quality and good uniformity, and is beneficial to large-scale integration and application of two-dimensional electronic devices.

The invention provides a preparation method of high-purity molybdenum trioxide, which belongs to the technical field of molybdenum trioxide production and comprises the following steps: S1, crushing, grinding and roasting molybdenum ore sand to obtain crude molybdenum oxide, adding the crude molybdenum oxide into a sodium hydroxide solution, heating, stirring and filtering to obtain a crude sodium molybdate solution; s2, adjusting the pH value of the crude sodium molybdate solution to 5.5-7.0, introducing the crude sodium molybdate solution into an exchange column of macroporous cation exchange resin, then adjusting the pH value of the solution to 7.0-8.5, and introducing the crude sodium molybdate solution into an exchange column filled with anion exchange resin to obtain a high-purity sodium molybdate solution; s3, excessive ammonia water is added into the high-purity sodium molybdate solution, ammonium molybdate is separated out, washing and drying are conducted, and high-purity ammonium molybdate is obtained; and S4, the high-purity ammonium molybdate is put into a rotary calcining furnace, rare earth oxide is sprayed on the inner wall of a furnace tube, and the high-purity molybdenum trioxide is prepared by adopting a calcining mode of firstly heating, then cooling and then heating. According to the invention, the purpose of producing high-purity molybdenum trioxide is realized.

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 relates to the technical field of superfine molybdenum powder preparation, in particular to a preparation device and method for low-oxygen superfine molybdenum powder. The specific preparation device comprises a sublimation bin, a reaction area and a gas-solid separation bin which are sequentially connected, the reaction zone comprises a preheating zone, a reduction zone and a conversion zone; a part of the hydrogen pipeline and a part of the carbon monoxide pipeline are arranged in the preheating area; one end of the hydrogen pipeline extends to the reduction area and is used for providing preheated hydrogen and carrying out gas-phase reduction reaction on the preheated hydrogen and the gas-phase MoO3 subjected to heat preservation; one end of the carbon monoxide pipeline extends to the conversion area and is used for providing preheated carbon monoxide and reacting with water vapor to complete primary water vapor conversion; meanwhile, partial carbon monoxide is subjected to a disproportionation reaction to generate micro carbon powder, and the micro carbon powder and water vapor are subjected to a water gas reaction to complete secondary water vapor conversion. The problem that the oxygen content of existing superfine molybdenum powder prepared through gas-phase molybdenum trioxide reduction is too high is solved.

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 discloses a growth method for controlling the layer number and stacking structure of molybdenum disulfide crystals based on temperature gradient and application of the growth method, and belongs to the technical field of two-dimensional layered materials and photoelectric materials. Molybdenum trioxide powder and sulfur powder are used as precursors, sodium chloride is used as an auxiliary agent, the growth temperature is controlled to be 700-900 DEG C through chemical vapor deposition, and the molybdenum disulfide crystals are obtained. According to the method, accurate control over the layer number and the stacking structure of the molybdenum disulfide crystals is achieved through the temperature gradient, the method has high controllability and repeatability, an efficient technical means is provided for preparation of large-area and high-quality molybdenum disulfide materials, and the method is suitable for industrial production. The technical problem that the number of layers of multi-layer materials and the stacking structure are uncontrollable is solved. The method disclosed by the invention is accurate in control and suitable for preparing the high-performance photoelectric material with a specific layer number and a stacking structure.

The invention discloses a molybdenum-vanadium-aluminum intermediate alloy and a low-cost preparation method thereof. The molybdenum-vanadium-aluminum intermediate alloy comprises the following chemical components in percentage by mass: 39-41% of Mo, 39-41% of V and the balance of Al. The method comprises the following steps: uniformly mixing vanadium oxide (tablets replace powder), molybdenum trioxide, metal aluminum, calcium fluoride, calcium oxide and a cold material according to a mass ratio of (28-32): (24-26): (32-35): (10-13): (1.5-4): (5-10); then putting the mixture into a graphite crucible for tamping treatment; and finally, the metal powder is directly ignited for a reduction reaction, and the molybdenum-vanadium-aluminum intermediate alloy can be obtained. According to the method, the recovery rates of the molybdenum and the vanadium are increased by adjusting the components and the ratio of the raw materials and the auxiliary materials and adopting a one-step aluminothermic reduction method, and the recovery rates of the molybdenum and the vanadium can reach 95 wt% or above and 96 wt% or above respectively.

The invention discloses an industrial flue gas denitration filter bag and a preparation method thereof, and relates to the technical field of flue gas denitration. The industrial flue gas denitration filter bag comprises PTFE (Polytetrafluoroethylene) fibers, PPS (Polyphenylene Sulfide) fibers, PI (Polyimide) fibers and PTFE loaded fibers. Wherein the PTFE loaded fiber is a PTFE fiber layer loaded with a modified molecular sieve catalyst; the modified molecular sieve catalyst takes a molecular sieve coated with modified nanorods as a carrier, a vanadium-titanium composite oxide as an active catalytic component and a cerium-titanium composite oxide as a co-catalytic component; the modified nanorod is a molybdenum-tungsten composite oxide modified cerium dioxide nanorod. By introducing the modified molecular sieve catalyst prepared from cerium dioxide nanorods, lanthanum nitrate, molybdenum trioxide and other raw materials, the denitration capacity, the ammonia escape prevention capacity, the sulfur poisoning resistance, the hydrothermal stability and the working life are further improved, and an active temperature window is widened. Therefore, the method has a wider application prospect.

The present invention provides a method for preparing high-purity molybdenum trioxide, belongs to the technical field of molybdenum trioxide production, and comprises the following steps: step S1, molybdenum ore is crushed and ground, roasted, crude molybdenum oxide is obtained, added to sodium hydroxide solution, heated and stirred, filtered, and crude sodium molybdate solution is obtained; step S2, the crude sodium molybdate solution is adjusted to pH 5.5-7.0, an exchange column of macroporous cation exchange resin is passed, and the solution pH is adjusted to 7.0-8.5, and an exchange column equipped with anion exchange resin is passed to obtain a high-purity sodium molybdate solution; step S3, excessive ammonia water is added to the high-purity sodium molybdate solution, ammonium molybdate is precipitated, washed, and dried to obtain high-purity ammonium molybdate; step S4, high-purity ammonium molybdate is put into a rotary calcining furnace, the inner wall of the furnace tube is sprayed with rare earth oxide, and a calcination mode of first heating, then cooling, and then heating is adopted to prepare high-purity molybdenum trioxide. The present invention realizes the purpose of producing high-purity molybdenum trioxide.

A battery is provided comprising a coated sintered cathode. The coated sintered cathode comprises at least one of lithium cobalt oxide (LiCoO2) or NMC (LiNi(1-x-y)MnxCoyO2). The coated sintered cathode also comprises a coating layer. The coating layer comprises at least one of aluminum oxide (Al2O3), aluminum fluoride (AlF3), zinc oxide (ZnO), magnesium oxide (MgO), titanium dioxide (TiO2), lanthanum oxide (La2O3), zirconium oxide (ZrO2), gallium oxide (Ga2O3), magnesium fluoride (MgF2), molybdenum trioxide (MoO3), selenium (Se), or phosphorous pentoxide (P2O5). The coating layer is coated on the sintered cathode by atomic layer deposition. The sintered cathode may form a cathode-electrolyte interface inside the battery, and the coating layer may be positioned at the cathode-electrolyte interface.

Auto-igniting booster gas generant compositions according to various implementations include a primary fuel and at least two additives. The fuel may be a tetrazole or salt of tetrazole, such as 5-aminotetrazole, whereas the additives include boron carbide and molybdenum trioxide. The compositions may also include a secondary fuel, preferably potassium salt of 5-aminotetrazole. The auto-igniting booster gas generant compositions have an auto-ignition temperature of 200 degrees Celsius or less, self-igniting in the presence of an external heat source. The compositions may also include an oxidizer, such as potassium nitrate. Optionally, the auto-igniting booster gas generant compositions may include additional components, such as processing lubricants. For example, the compositions may include polyethylene to aid in processing and manufacturing.

The invention discloses a polyurethane outer packaging material with synergistic flame retardance of molybdenum trioxide, ammonium polyphosphate and organosilsesquioxane and a preparation method of the polyurethane outer packaging material, and belongs to the field of development of flame-retardant materials. The flame-retardant polyurethane flexible foam is synthesized through a one-step foaming process, the obtained flame-retardant polyurethane flexible foam material has an extremely good flame-retardant effect, and flame-retardant indexes such as limit oxygen index, thermal stability, heat release rate, total heat release, smoke yield, total smoke yield and carbon residue of the flame-retardant polyurethane flexible foam material are greatly improved; through the synergistic flame-retardant effect of molybdenum trioxide, ammonium polyphosphate and organosilsesquioxane, the polyurethane outer packaging material with an extremely prominent flame-retardant effect is developed, and the polyurethane outer packaging material has an extremely good application prospect.

A production process of electronic grade molybdenum dichloride dioxide comprises the following steps: S1, pretreatment: contacting molybdenum trioxide with a dilute acid solution at a low temperature for pickling to remove alkaline impurities and soluble metal impurities adsorbed on the surface, and drying for later use after washing; s2, wet synthesis: in an inert gas atmosphere, reacting the molybdenum trioxide subjected to acid pickling in the step S1 with concentrated hydrochloric acid of which the mass is 4-5 times of that of the molybdenum trioxide at 80-100 DEG C, and after the reaction is finished, evaporating and concentrating in a high-temperature chlorine atmosphere to generate a crude product of dichloromolybdenum dioxide; s3, primary sublimation purification; s4, complexing and decomplexing purification; and S5, secondary sublimation purification: using a quartz sublimation tower to carry out vacuum sublimation on the secondary decomplexed molybdenum dichloride obtained in the step S34, and collecting sublimation condensate to obtain the electronic grade molybdenum dichloride. The final product purity of the production process is greater than or equal to 6N, and the process can be used for large-scale production.

This invention belongs to the field of single-crystal material preparation technology, specifically relating to a molybdenum trioxide single-crystal ribbon and its preparation method. During the calcination of a molybdenum source, the ribbon is contacted with a structure-directing agent composed of alkali metal salts and metals other than molybdenum in Group 6, or alkaline earth metal salts and metals other than molybdenum in Group 6. After cooling, the molybdenum trioxide single-crystal ribbon is obtained. This invention does not require complex template guidance, the structure-directing agent is simple and readily available, and it enables molybdenum trioxide crystals to grow along a specific direction, resulting in a highly crystalline molybdenum trioxide single-crystal ribbon.

The invention discloses a wafer-level single-layer MoS2 film and a preparation method thereof, and the method comprises the steps: taking sulfur powder and molybdenum trioxide powder as reaction precursors, and respectively placing the reaction precursors in two quartz boats; the quartz boat containing the sulfur powder, the quartz boat containing the molybdenum trioxide powder and the C-face sapphire substrate which is vertically placed in the air flow circulation direction are placed in a first temperature zone, a second temperature zone and a third temperature zone in the single-tube type CVD tube furnace respectively, wherein the first temperature zone, the second temperature zone and the third temperature zone are arranged in the single-tube type CVD tube furnace; the method comprises the following steps: cleaning a single-tube CVD tube furnace, introducing a carrier gas into the cleaned single-tube CVD tube furnace, respectively heating sulfur powder, molybdenum trioxide powder and a C-plane sapphire substrate when a preset pressure in the furnace is reached, and forming a wafer-level single-layer MoS2 film with good uniformity and relatively high quality, thereby solving the technical problems of low yield and poor uniformity of a two-dimensional MoS2 film obtained by existing mechanical stripping.

The utility model discloses a dust-free type particle screening device for molybdenum trioxide production, which comprises a shaftless drum screen body, the lower part of the shaftless drum screen body is respectively provided with a plurality of stages of collecting hoppers corresponding to different screen sections, the top of the shaftless drum screen is buckled with a shell, the two sides of the shell are connected with negative pressure dust collecting components through air guide pipes, and the negative pressure dust collecting components are connected with the shaftless drum screen body through air guide pipes. The utility model relates to the technical field of molybdenum trioxide production, an existing shaftless drum screen body is improved, a shell is additionally arranged on the upper portion of the shaftless drum screen body, an operation space on the upper portion of the shaftless drum screen body is wrapped, flying dust generated in the operation process is effectively avoided, and the service life of the shaftless drum screen is prolonged. And meanwhile, dust generated in the screening operation process is collected and filtered in cooperation with a negative pressure dust collecting assembly, and scattered raw material powder is recycled.

The invention discloses a preparation method of a flame-retardant smoke-suppressing polystyrene foam material. Comprising the following raw materials in parts by weight: 100-120 parts of polystyrene resin, 12-24 parts of modified molybdenum trioxide, 4-8 parts of a processing aid, 5-7 parts of an antioxidant, 1-3 parts of a foaming aid and 5-10 parts of a foaming agent. The prepared polystyrene foaming material adopts a composite foaming system consisting of a foaming agent and a foaming aid, and has the characteristics of low density, light weight and good heat insulation performance; wherein the modified molybdenum trioxide has better compatibility with a polystyrene matrix, the agglomeration phenomenon is reduced, the influence on the mechanical properties of the material is reduced, the heat resistance, flame retardance and smoke suppression performance of the material can be greatly improved, and the performance is long and stable; therefore, the polystyrene foam material prepared by the invention is light in weight and good in heat insulation, has stable and efficient heat resistance, flame retardance and smoke suppression performance, and has important application value in the technical field of foam materials.

The invention belongs to the technical field of photocatalysis and environmental governance, and particularly relates to a composite photocatalyst, in particular to a graphite-phase carbon nitride / molybdenum trioxide composite photocatalyst as well as a preparation method and application thereof. The method comprises the following steps: S1, dispersing ammonium heptamolybdate in deionized water, adjusting the pH value of the solution to 0.5 + / -0.3 by using sulfuric acid, stirring and centrifuging the formed system, and carrying out vacuum drying to obtain a molybdic acid precursor; s2, mixing melamine and the molybdic acid precursor, calcining the formed mixture, and naturally cooling to room temperature after calcining is finished, so as to obtain the composite photocatalyst. Tests prove that the prepared catalyst has excellent cycling stability, still keeps high catalytic activity after being recycled for multiple times, and has a good industrial application prospect.

The present invention relates to a foam carbon wave-absorbing material, which comprises foaming component A and foaming component B, and the ratio of the foaming component A to the foaming component B is 150-160:100; the foaming component A comprises a polyurethane foaming ingredient A, ammonium polyphosphate, expanded graphite powder, and molybdenum trioxide; the foaming component B comprises a polyurethane foaming ingredient B. In the preparation of foam carbon in the prior art, the foaming and carbonization steps are carried out simultaneously at a high temperature, so the yield is low and the reaction process is difficult to control; however, in the preparation process of the present application, the polyurethane foam is first generated from the foaming material at room temperature and then carbonized at a high temperature, so the process route in the present application is easier to control the finished product quality and has a lower cost, and the requirements for equipment are not high.

The invention provides a method for generating molybdenum dioxide or molybdenum carbide through reduction of molybdenum trioxide and application, and the method comprises the following steps: dispersing MoO3 powder in a mixed solution of monohydric alcohol and polyhydric alcohol, adding a triblock copolymer P123 stabilizer, carrying out microwave-assisted solvothermal reaction on the obtained suspension, centrifuging or filtering and washing to obtain molybdenum dioxide or molybdenum carbide; the obtained brown H0. 93MoO3 / C precursor microspheres are placed in an argon plasma environment, high-temperature calcination is carried out at the temperature of 500-600 DEG C for 30-60 min, and brown black MoO2 / C microspheres are obtained; or placing the H0. 93MoO3 / C precursor in a hydrogen-argon plasma environment, and calcining the H0. 93MoO3 / C precursor at a high temperature of 500-600 DEG C for 30-60 minutes to obtain the gray Mo2C / C microspheres. The MoO2 / C and Mo2C / C materials prepared in the invention have nanocrystalline characteristics and excellent electrochemical performance, and have good commercial application prospects as lithium battery negative electrode materials.

A display device includes a substrate; an anode electrode disposed on the substrate; a first anti-contact layer disposed on the anode electrode and including molybdenum trioxide (MoO3); a second anti-contact layer disposed on the first anti-contact layer and including molybdenum dioxide (MoO2); and a pixel-defining layer disposed on the second anti-contact layer, wherein the first anti-contact layer includes a first opening, wherein the second anti-contact layer includes a second opening, wherein the pixel-defining layer includes a third opening, and wherein the first opening, the second opening and the third opening overlap one another and expose the anode electrode.

The invention discloses a preparation method of nearly spherical porous nano molybdenum powder. The method comprises the following steps: 1, decomposing molybdenum salt to obtain molybdenum trioxide; 2, performing hydrothermal reaction and carbonization on the organic carbon source to obtain carbon microspheres; 3, performing high-temperature carbonization to obtain partially graphitized microcrystalline carbon spheres; 4, molybdenum trioxide and microcrystalline carbon spheres are mixed in a high-dispersion mode, and a mixed material is obtained; 5, carrying out heat treatment on the mixed material to obtain nearly spherical molybdenum dioxide powder; and sixthly, hydrogen reduction is conducted, and the nearly-spherical porous nanometer molybdenum powder is obtained. Molybdenum salt is decomposed through rapid heating to avoid agglomeration of the molybdenum salt, microcrystalline carbon spheres which are good in dispersity and uniform in size are obtained through a hydrothermal method and high-temperature carbonization to serve as a nucleating agent for hydrogen reduction, the situation that subsequent agglomeration and growth of MoO2 and Mo powder are hindered in the chemical vapor transmission process in the hydrogen reduction process is avoided, and therefore the molybdenum-molybdenum-molybdenum composite material is obtained. And the chemical vapor transmission and growth process in the MoO2-Mo hydrogen reduction process is controlled in combination with gradient heating reduction, so that the dispersity of Mo particles and the size of a pore structure are ensured.

The present invention relates to a silicate glass comprising from 35 to 45 wt% of silicon dioxide (SiO2), at most 15 wt% of molybdenum trioxide (MoO3), from 4 to 7 wt% of zirconium dioxide (ZrO2), from 1 to 3.5 wt% of phosphorus pentoxide (P2O5), and from 14 to 28 wt% of one or more alkali metal oxides and / or one or more alkaline-earth metal oxides, the weight percentages being expressed relative to the total weight of the glass. The present invention also relates to a method for improving the solubility of molybdenum in a glass melt.

The invention belongs to the technical field of lithium battery materials, and particularly discloses a porous carbon negative electrode material for a lithium ion battery and a preparation method of the porous carbon negative electrode material. Firstly, a copolymer is prepared through staged polymerization of a functional monomer and a chain transfer agent; secondly, taking nano molybdenum trioxide and zinc acetate dihydrate as raw materials, and performing ball milling and roasting to form a core-shell template; then, mixing and sieving the copolymer, the core-shell template, sodium chloride and the polymethyl methacrylate microspheres to obtain a precursor; and finally, carrying out multi-stage heating carbonization and post-treatment on the precursor to obtain the porous carbon negative electrode material. The obtained negative electrode material has a hierarchical porous structure and a high specific surface area, synergistic doping of multiple elements such as nitrogen, phosphorus and molybdenum is realized, rapid transmission and efficient storage of lithium ions are effectively promoted, the rate capability and cycling stability of a battery are remarkably improved, polarization impedance is reduced, and meanwhile, the electronic conductivity and interface stability of the material are further optimized; excellent comprehensive electrochemical performance is shown in the application of a high-energy-density lithium ion battery.