67 results about "Molybdenum dioxide" patented technology

The present invention relates to a process for producing molybdenum dioxide dichloride, which is a very efficient process that does not use hazardous chlorine gas and high reaction temperatures and enables the production of molybdenum dioxide dichloride in high yield without solvent.

The invention discloses a method for purifying electronic grade molybdenum dioxide dichloride, which comprises the following steps of: removing low-boiling-point substances by adopting a sublimation method, collecting sublimation gas of which the main component is a target product by adopting sublimation in a fixed temperature interval, then removing substances with different chemical properties and polarities by adopting a complexing and decomplexing method, and finally further removing impurities by sublimation to obtain the electronic grade molybdenum dioxide dichloride. And finally obtaining the electronic grade molybdenum dioxide dichloride with the purity not lower than 7N grade. The method has the characteristics of good purification effect, multi-method comprehensive impurity removal, industrial large-scale application, stable quality, high yield and simple and easy-to-separate impurity components.

The present invention provides a method for preparing molybdenum dioxide dichloride based on a molybdenum-containing solution. The technical scheme comprises the following steps: adjusting the pH of the molybdenum-containing solution to 7.5-9.0 using a pH regulator to obtain a treated molybdenum-containing solution; adding a calcium source to the treated molybdenum-containing solution at a molar ratio of molybdenum to calcium source of 1:1.5-2.0, stirring, and solid-liquid separation to obtain a molybdenum-containing precipitate; mixing the molybdenum-containing precipitate with a chlorinating agent at a molar ratio of molybdenum to chlorinating agent of 1:1-4 to obtain a chlorination reaction product; placing the chlorination reaction product in a reaction apparatus, introducing a protective atmosphere, and reacting at 150-180°C for 1-3 hours to produce molybdenum dioxide dichloride gas; and condensing the molybdenum dioxide dichloride gas at 0-50°C to obtain molybdenum dioxide dichloride based on the molybdenum-containing solution. This method features a simple process, environmental friendliness, high safety, and low energy consumption. The prepared molybdenum dioxide dichloride based on the molybdenum-containing solution is of high purity.

Methods for preparing catalysts for oxidative dehydrogenation (ODH) of alkanes such as ethane are provided. An exemplary method includes forming a slurry including metal oxides; one or more of a bismuth compound, an antimony compound, and a tellurium compound; a reducing agent; and water; and heating the slurry to form the catalyst. The metal oxides include an oxide of molybdenum and an oxide of vanadium. The bismuth compound includes bismuth oxide, bismuth hydroxide, or a bismuth carbonate. The antimony compound includes an oxide of antimony, an antimony acetate, or an antimony ethoxide. The tellurium compound includes tellurium dioxide. The reducing agent includes molybdenum dioxide and may further include vanadium dioxide. The methods use all inorganic reagents, with no build up COx pressure observed during the hydrothermal synthesis.

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 provides a novel method for preparing molybdenum dioxide dichloride, belonging to the technical field of molybdenum dioxide dichloride. The method uses molybdenum trichloride, activated carbon, and chlorine as reaction raw materials. The molybdenum trichloride and activated carbon are mixed in a certain proportion, placed in a tubular reactor, heated to a certain temperature, and then an excess of dry chlorine is introduced to react to produce molybdenum dioxide dichloride gas. This gas is collected in a cooling chamber to obtain molybdenum dioxide dichloride solid. The crude product is then sublimated and purified to ultimately obtain a high-purity molybdenum dioxide dichloride product. This method has a high yield, improves raw material utilization and product yield, reduces production costs, and is conducive to industrial production.

The application discloses a method for removing organic pollutants by using molybdenum dioxide to promote activated periodate, and comprises the following steps: adding molybdenum dioxide, ferric salt and periodate into wastewater containing organic pollutants, and then performing catalytic degradation reaction to remove the organic pollutants in the wastewater. In the method, molybdenum dioxide is introduced into the homogeneous ferric / periodate system, and serves as an electron donor and mediator of a Fenton-like reaction. The molybdenum dioxide can not only accelerate the Fe 3+ / Fe 2+ cycle rate and promote the activation of the periodate, but also promote the generation of high-valence iron (Fe(IV)) in the system, form a non-radical pathway dominated oxidation mechanism, promote the degradation reaction to be more rapid and intense, and finally realize the efficient degradation of the organic pollutants. The method has the advantages of rapid degradation rate, good reusability, simple process, convenient operation and environmental friendliness, and can be widely used in the treatment of organic pollutant wastewater.

The invention relates to a graphene-coated molybdenum dioxide nanorod composite material as well as a preparation method and application thereof. The composite material is of a core-shell structure and takes a molybdenum dioxide nanorod as a core and a graphene layer as a shell; the graphene layer is formed by high-temperature carbonization of polyaniline, and the thickness of the graphene layer is 10-80 nm. The preparation method comprises the following steps: dissolving a molybdenum source in a nitric acid aqueous solution for hydrothermal reaction to prepare a molybdenum trioxide nanorod precursor; dispersing the molybdenum trioxide nanorod precursor in an acidic solution, sequentially adding aniline and ammonium persulfate under a stirring condition, and reacting to obtain a polyaniline / molybdenum trioxide composite precursor; and drying the composite precursor, and carrying out high-temperature calcination to obtain the graphene-coated molybdenum dioxide nanorod composite material. Compared with the prior art, the composite material has the high conductivity of graphene and the chemical activity of molybdenum dioxide, and shows excellent removal efficiency and cycling stability on lead ions in the capacitive deionization process.

The present invention relates to the technical field of metal additive manufacturing, and discloses a method for preparing molybdenum-rhenium alloy powder suitable for 3D printing. The method specifically comprises the following steps: step 1, weighing raw materials ammonium rhenate and molybdenum dioxide to prepare a slurry; step 2, spray drying and granulation to prepare spherical precursor granules; step 3, calcination and hydrogen reduction to prepare molybdenum-rhenium alloy intermediate powder; step 4, plasma spheroidization treatment to prepare spherical molybdenum-rhenium alloy powder. The present invention performs hydrogen reduction on the spray-dried precursor granules and can achieve a sintering effect. The intermediate powder after reduction retains the spherical morphology of the precursor and improves the cohesive strength. At the same time, the interior of the particles maintains a loose and porous structure, and can achieve stable powder feeding and improve heat energy absorption efficiency in a plasma torch environment. In actual production applications, it can effectively reduce energy consumption, improve spheroidization efficiency and sphericity.

The application provides a method and application for reducing molybdenum trioxide to generate molybdenum dioxide or molybdenum carbide, which comprises the following steps: dispersing MoO3 powder in a mixed solution of monohydric alcohol and polyhydric alcohol, adding a triblock copolymer P123 stabilizer, and obtaining a suspension which is subjected to microwave-assisted solvothermal reaction, centrifugation or filtration and washing, and then brown H 0.93 The MoO3 / C precursor microspheres are placed in an argon plasma environment and calcined at a high temperature of 500-600 DEG C for 30-60 min to obtain brown-black MoO2 / C microspheres; or the H 0.93 The MoO3 / C precursor is placed in a hydrogen-argon plasma environment and calcined at a high temperature of 500-600 DEG C for 30-60 min to obtain gray Mo2C / C microspheres. The MoO2 / C and Mo2C / C materials prepared by the application have nanocrystalline characteristics and excellent electrochemical performance, and have a good commercial application prospect as negative electrode materials of lithium batteries.

This invention discloses a method for preparing a nano-zinc sulfide composite material, comprising: (1) dissolving ammonium molybdate in deionized water, stirring evenly to form a 50 g / L solution, then sequentially adding zinc acetate and thiourea, wherein the mass ratio of ammonium molybdate to zinc acetate and thiourea is 2:1, and stirring thoroughly to obtain a mixed solution; (2) transferring the obtained mixed solution to a reaction vessel, reacting at a constant temperature of 160℃ for 12 h, and obtaining a solid powder after treatment; (3) heat-treating at 300-400℃ for 2 h to obtain the nano-zinc sulfide composite material. This invention synthesizes zinc sulfide nanomaterials with different sizes and morphologies, while molybdenum dioxide nanoparticles modify the surface of zinc sulfide. The two work synergistically to have heterogeneous structural characteristics that promote and accelerate electron transport. Using them as electrode materials for electrochemical detection of nicotine and the metabolite cotinine content in cigarettes shows potential application advantages.

The invention discloses a method for preparing a molybdenum dioxide-molybdenum carbide heterostructure material through an in-situ carbonization method and application of the molybdenum dioxide-molybdenum carbide heterostructure material. A molybdenum source and dopamine hydrochloride are self-assembled in a trihydroxymethyl aminomethane buffer solution with the pH being 8.5 to form a precursor, after centrifugation, cleaning and drying, gradient heating carbonization is conducted in an inert atmosphere, and the molybdenum dioxide-molybdenum carbide heterostructure material is obtained. Molybdenum dioxide and molybdenum carbide in the obtained material are tightly compounded in a nanocrystalline form to form a hierarchical porous structure, the material can be used as a multifunctional modification layer of a polypropylene (PP) diaphragm in a lithium-sulfur battery, and the specific structure and interface electron enhancement effect of the material are utilized to improve the performance of the lithium-sulfur battery. The adsorption and catalytic conversion kinetics of the lithium polysulfide intermediate can be effectively improved, so that the comprehensive electrochemical performance of the lithium-sulfur battery is improved. The method is simple in process and low in cost, and a new strategy is provided for design of a high-performance energy storage material.

The invention relates to a method for purifying high-purity molybdenum dioxide dichloride, which comprises the following steps: S1, adding a raw material molybdenum dioxide dichloride into sublimation equipment under the protection of inert gas or nitrogen, arranging a filter screen and a small pore plate between a sublimation end and a receiving end, and vacuumizing the sublimation equipment; s2, raising the temperature of the sublimation equipment to 150-170 DEG C, the temperature of a high-boiling-point region to 120-140 DEG C, the temperature of a product region to 100-120 DEG C and the temperature of a low-boiling-point region to 80-100 DEG C, and collecting a product molybdenum dioxide dichloride in the product region; and S3, sampling the high-purity molybdenum dichloride collected in the step S2, and repeating the operation for sublimation for multiple times to finally obtain a high-purity molybdenum dichloride product. According to the method, the content of inorganic metal elements such as aluminum, iron and titanium in the dichloromolybdenum dioxide is remarkably reduced, and small-particle-size powder particles are prepared and serve as a molybdenum-containing film precursor, so that the production requirement is met.

This invention discloses a method for extracting molybdenum from molybdenum oxide raw materials, comprising: mixing the molybdenum oxide raw materials with a certain proportion of leaching agent for leaching to obtain a first leaching solution for later use; removing impurities from the first leaching solution through resin or extractant to obtain a molybdenum-containing purified solution; adding a control agent to the molybdenum-containing purified solution to obtain a precursor solution; and placing the precursor solution in an autoclave for heating and decomposition to obtain the final product. The process of this invention can prepare molybdenum dioxide products in a short time, with simple steps and low economic cost, and avoids the introduction of ammonia nitrogen reagents throughout the process, thus preventing the generation of ammonia nitrogen waste pollutants. The molybdenum leaching rate during the leaching process and the molybdenum precipitation rate during the product preparation process of this invention exceed 99.5%.

The invention discloses an acid and alkali resistant composite material and a preparation method and application thereof in solar photo-thermal water evaporation, and belongs to the technical field of photo-thermal conversion materials, the key point of the technical scheme is that the preparation method of the acid and alkali resistant composite material comprises the following steps: S1, mixing pure water, ethanol and isopropanol to obtain a mixed solvent; s2, molybdenum acetylacetonate is dissolved in a mixed solvent to obtain a mixed solution; s3, the mixed solution and a hydrophilic PTFE film are mixed and then heated for 8-12 h at the temperature of 180-220 DEG C, and the MoO2 / PTFE composite material is prepared, molybdenum dioxide balls grow on the hydrophilic PTFE film through a solvothermal method, the water evaporation rate of the composite material can be kept stable in the severe environment (acidic, alkaline or high-salt), and therefore the composite material shows excellent stability and durability, and the composite material can be used for preparing the composite material. In addition, the used materials are low in price, the manufacturing process is simple, and popularization is easy.

The application belongs to the technical field of bulletproof ceramic preparation, and provides a boron carbide bulletproof ceramic material and a preparation method thereof; first, molybdenum trioxide is subjected to reduction treatment in a hydrogen atmosphere to prepare reduced molybdenum dioxide; second, boron carbide, the reduced molybdenum dioxide and an additive in a specific proportion are mixed with a solvent, uniformly mixed through a ball milling process, and then subjected to vacuum drying and sieving treatment to prepare a uniform mixed powder; the mixed powder is subjected to unidirectional pressure cold pressing preforming, and the green body is further improved in density through cold isostatic pressing; the green body is subjected to gradient temperature sintering, sequentially experiences a reduction activation stage and a densification stage, realizes a high densification structure of the ceramic material, and finally, the sintered body is subjected to hot isostatic pressing treatment, further optimizes the internal structure of the material, improves the density and mechanical properties, and is suitable for the field of bulletproof materials.

The embodiment of the present application relates to a kind of molybdenum disulfide coated lithium lanthanum zirconium oxygen composite solid electrolyte material and its preparation method.The preparation method includes: ammonium tetrathiomolybdate is dissolved in pure water and dissolved, to obtain ammonium tetrathiomolybdate solution;Lithium lanthanum zirconium oxygen solid electrolyte is added to ammonium tetrathiomolybdate solution, and slurry is prepared by ultrasonic dispersion and stirring;The slurry is spray dried into dry powder;The powder is heat treated in the atmosphere of hydrogen mixed protective gas, to obtain molybdenum dioxide coated lithium lanthanum zirconium oxygen composite solid electrolyte material.

The invention discloses a Ni-doped ferroferric oxide-molybdenum dioxide composite nano material, a preparation method thereof and application of the Ni-doped ferroferric oxide-molybdenum dioxide composite nano material as a hydrogen and oxygen evolution electrocatalyst. According to the invention, the Ni-doped ferroferric oxide-molybdenum dioxide composite nano material is successfully prepared through a diversified material preparation process combining hydrothermal synthesis, high-temperature calcination and electro-deposition. The catalyst is a non-noble metal-based composite material, has the advantages of low raw material cost and green and controllable preparation process, and solves the industrial problems of high price and scarce resources of traditional noble metal catalysts (such as Pt and RuO2).

The invention discloses a truncated octahedron-shaped lithium titanate material and a preparation method thereof, and belongs to the technical field of materials. The preparation method comprises the following steps: mixing a titanium source compound, a lithium source compound and MoO3 to obtain a precursor mixture; and adding an organic carbon source into the precursor mixture, uniformly mixing, carrying out high-temperature sintering, and naturally cooling to obtain the Li4Ti5O12 material. According to the invention, the characteristic of simple operation of a solid phase method is utilized, MoO2 is generated in situ by controlling the addition of a small amount of additive MoO3 and an organic carbon source, and the lithium titanate material with octahedral morphology, relatively uniform dispersion and uniform particle size is synthesized. According to the preparation method disclosed by the invention, the situation that divalent molybdenum is oxidized into a higher valence state in the ball milling process due to direct addition of molybdenum dioxide is avoided, and the situation that morphology control is not uniform due to interference of molybdenum in other valence states is avoided; the synthesis method is simple to operate and relatively low in cost, and has a large-scale application prospect.

The invention provides a composite negative electrode material and a preparation method and application thereof.The composite negative electrode material comprises carbon nanofibers and a heterojunction composite material wrapped in the carbon nanofibers, and the heterojunction composite material comprises first metal and molybdenum dioxide, the work function of the first metal is greater than that of the molybdenum dioxide. The ion conduction rate of the battery can be improved, and the cycle performance is improved.

The application discloses a platinum-nickel loaded molybdenum carbide / molybdenum dioxide nanocomposite material, a preparation method and application. The application first uses a metal molybdenum salt and a complexing agent as raw materials to prepare a Mo2C / MoO2 base material containing a heterojunction, then loads PtNi on the Mo2C / MoO2 base material to prepare the platinum-nickel loaded molybdenum carbide / molybdenum dioxide nanocomposite material. The MoO2 / Mo2C nanomaterial carrier well anchors the PtNi alloy, further improves the catalytic stability of the material, and the electronic coupling and interface synergistic effect provided by the heterojunction can enhance the reactivity of the active sites, so as to maximize the catalytic performance of the material, and further reduce the hydrogen production application cost under an acid condition. Experimental results show that the platinum-nickel loaded molybdenum carbide / molybdenum dioxide nanocomposite material has the advantages of high catalytic activity, excellent stability and the like as a hydrogen production electrocatalyst of an acid electrolyte, and therefore has a wide application prospect.

The invention discloses a preparation method and application of a molybdenum dioxide loaded platinum catalyst, and belongs to the technical field of nano-catalysts, the preparation method comprises the following steps: dissolving platinum acetylacetonate and molybdenum acetylacetonate in an organic solvent, dispensing on carbon paper, heating, and drying to obtain a molybdenum dioxide loaded platinum catalyst; and fixing the obtained carbon paper loaded with the precursor sample in a Joule heating device to complete a rapid carbon thermal shock reaction. According to the invention, the metal platinum can be effectively dispersed to expose more reaction active sites, and the interaction between the metal platinum and the molybdenum dioxide carrier is utilized to reduce the adsorption capacity of the metal platinum to hydrogen, enhance the activity and stability of a catalytic system, improve the catalytic activity of hydrogen production by electrolysis of water, and significantly reduce the usage amount of the metal platinum.

The present application relates to the technical field of industrial solid waste resource utilization, in particular to a process for producing heavy slag sand from high-titanium slag. The process comprises the following steps: (1) adjusting the molten slag: under the condition of 1450-1500 DEG C, adding molybdenum dioxide and / or bauxite to the molten high-titanium slag, and then adding sodium carbonate and stirring to obtain the adjusted molten slag; (2) controlling the temperature and granulating: centrifuging the adjusted molten slag to form particles, and cooling the molten droplets by high-pressure air cooling to ensure that the molten droplets are cooled to 900-1100 DEG C during flight, and obtaining the granulated material; (3) activation treatment: activating the granulated material, and then dehydrating, drying and screening the activated material to obtain the heavy slag sand. The process optimizes the mineral phase composition of the slag and improves the mechanical properties of the product through the synergistic effect of molten component adjustment, temperature control granulation and hydrothermal activation, and finally prepares high-quality heavy slag sand meeting the building standards, realizing efficient resource utilization of high-titanium slag.

The application relates to the technical field of anti-radiation glass, and discloses anti-radiation glass for low-orbit spacecrafts, a preparation method and application thereof. The anti-radiation glass for low-orbit spacecrafts comprises the following raw materials in parts by mass: quartz sand 45.5-68 parts, aluminum hydroxide 8.41-10.25 parts, boric acid 8.86-24.62 parts, carbonate 24-43.69 parts, cerium dioxide 0.6-2.1 parts, gallium sesquioxide 0.2-1.2 parts, antimony sesquioxide 0.5-1 part, nitrate 2-4.6 parts, molybdenum dioxide 0.5-1.4 parts, lead oxide 0.8-2.2 parts, tetrabutyl titanate 3.4-12.75 parts, and kerosene 0.2-0.8 part. Through the technical scheme, the problem of insufficient anti-radiation performance of the glass for low-orbit spacecrafts in the related art is solved.

The invention discloses a hydrogen reduction method for improving the reduction efficiency of molybdenum powder, which comprises the following steps: preparing molybdenum dioxide subjected to primary reduction into molybdenum dioxide fine powder of which the particle size is not greater than 8 microns, and / or increasing the apparent density of the molybdenum dioxide subjected to primary reduction to 1.5-2.0 g / cm < 3 >; loading the obtained molybdenum dioxide into a porous boat; putting the porous boat filled with molybdenum dioxide into a reduction furnace; closing the reduction furnace, heating the reduction furnace, and introducing hydrogen while heating; water vapor in the reduction furnace is extracted in a pulse mode; and opening the reduction furnace, and taking out the reduced molybdenum powder. By changing the morphology of molybdenum dioxide, the apparent density of molybdenum dioxide is improved, the secondary reduction loading amount is increased, the loading amount is increased by 30-50%, the single-furnace yield is remarkably increased, the secondary reduction process is optimized, the mass transfer efficiency of hydrogen permeation and water vapor overflow is enhanced, the reaction time is shortened, the hydrogen utilization rate is increased by 20% or above, and the reduction time is shortened by 15-25%; the molybdenum powder has uniform particle size (D90 < = 5 microns) and oxygen content < = 0.1%.

The present invention relates to the technical field of sodium / lithium ion battery negative electrode materials, and discloses a molybdenum-based negative electrode material, a preparation method thereof, and an application thereof. The material comprises nitrogen- and sulfur-coated carbon nanorods, wherein the carbon nanorods are filled with core-shell molybdenum-based nanoscrolls; the core-shell molybdenum-based nanoscrolls comprise a molybdenum dioxide core and a molybdenum disulfide shell with a curved structure, and the number of molybdenum disulfide layers is 12 to 35. The molybdenum-based negative electrode material provided by the present invention consists of a core-shell MoO2-MoS2 nanoscroll with a carbon nanorod coating and internal filling; the MoO2-MoS2 nanoscroll is obtained by homologous conversion of MoO3 nanorods and has a unique core-shell structural feature. The two form a large number of heterogeneous interfaces, providing abundant reaction active sites for storing sodium ions or lithium ions and accelerating the electrochemical reaction kinetics; the MoS2 shell has a curved structural feature, and the number of MoS2 layers is regulated to 12 to 35 layers by limiting the pyrolysis temperature and the amount of sulfur-containing initiator, so as to obtain excellent sodium / lithium storage performance, and has excellent rate performance and cycle stability when used in sodium / lithium batteries.

The invention relates to a method for preparing a patterned molybdenum dioxide thin film through laser induction and a flexible electronic device, and belongs to the technical field of functional material preparation and processing, precursor ink containing molybdenum trioxide nanoparticles, polyvinylpyrrolidone and isopropanol is prepared, a substrate is coated with the precursor ink to form a precursor thin film, and the patterned molybdenum dioxide thin film is prepared. And after drying and curing, carrying out laser direct writing reduction sintering on the precursor film, and reducing and sintering into molybdenum dioxide by utilizing a photothermal effect generated by surface plasmon resonance. The invention aims to overcome the dependence of a traditional process on a high-temperature vacuum environment, and provides a method for efficiently preparing a molybdenum dioxide film with high conductivity and biocompatibility in an environment atmosphere in a patterning manner, and a multifunctional flexible electronic device is constructed based on the film.

The invention discloses a thermal insulation molybdenum trioxide-molybdenum dioxide heterojunction / polyimide aerogel composite material and a preparation method thereof. A molybdenum trioxide nanobelt with a specific length-width ratio is accurately synthesized by utilizing a hydrothermal reaction; the controllable growth of the molybdenum trioxide-molybdenum dioxide heterojunction is realized through interface engineering, and a heterogeneous interface with an energy band matching characteristic is formed; then, the molybdenum trioxide-molybdenum dioxide heterojunction is compounded with polyamide acid, and the composite aerogel with a layered structure is prepared through a strong temperature gradient driven freezing assembly method and a freezing drying technology. By constructing a triple synergistic phonon scattering network of a molybdenum trioxide-molybdenum dioxide heterojunction interface, an organic-inorganic hybrid interface and a gas-solid porous interface, phonon scattering is effectively improved, and heat conductivity is reduced. The performance bottleneck of a traditional heat insulation material is broken through, and a brand new solution is provided for efficient heat management in an extreme environment.

The application belongs to the technical field of conductive ceramic materials, and particularly relates to a conductive ceramic material and a preparation method and application thereof. According to mass parts, the conductive ceramic material comprises the following components: 79-97 parts of beta-aluminum oxide, 0.5-2 parts of yttrium oxide, 0.7-3 parts of thorium oxide, 1-8 parts of zirconium oxide, 0.5-2 parts of molybdenum dioxide, 0.2-3 parts of copper oxide and 0.1-3 parts of zinc oxide. Due to the introduction of high-activity aluminum oxide nano powder and yttrium oxide, the sintering temperature can be greatly reduced, the energy consumption is reduced, the preparation cost is reduced, the competitiveness is improved, and the application is conducive to popularization.