393results about How to "Improve temperature adaptability" patented technology

The invention relates to a flexible supporting mechanism for a reflector of a spatial optical remote sensor. The supporting mechanism comprises a reflector frame, and a plurality of external ring bosses B that are circumferentially and uniformly distributed and connected with an external ring of the reflector frame; wherein the remote sensor is connected with the reflector frame through the external ring bosses B; radial flexible ring knots and axial flexible ring knots are arranged on the external ring bosses; each radial flexible ring knot comprises two radial flexible knots; each axial flexible ring knot comprises two axial flexible knots; the radial flexible knots can offset a radial force suffered by the reflector through elastic deformation; and the axial flexible knots can offset an axial force suffered by the reflector through the elastic deformation. With the adoption of the flexible supporting mechanism for the reflector of the spatial optical remote sensor, effects of stress and deformation of a remote sensor body on the reflector can be effectively eliminated; the difficulty of installing and adjusting of the reflector is reduced; the rigidity of the mechanism is ensured, effects of environmental factors such as temperature fluctuation and gravity on a surface shape of the reflector can be effectively reduced; and the supporting mechanism has the advantages that the supporting mechanism is high in rigidity, good in temperature adaptability, and easy to process and assemble.

The invention provides mortar for quickly repairing a filling layer of a slab ballastless track, and a preparation method and a use method of the mortar. The mortar for quickly repairing the filling layer of the slab ballastless track comprises the following raw materials in parts by mass: 0.95-0.99 parts of cement, 0.01-0.05 parts of an admixture, 0.35-1.4 parts of polymer emulsion, 1.5-2 parts of sand, 0-0.3 parts of water, 0.0004-0.01 parts of a defoaming agent, 0.0001-0.003 parts of a foaming agent, 0.0005-0.01 parts of an air-entraining agent, 0.001-0.005 parts of a thickening time control agent, 0-0.02 parts of a water reducing agent and 0-0.001 parts of a rheology modifier, wherein the cement is quick-hardening sulphoaluminate cement. The mortar can meet requirements of construction at different temperatures, and is high in hour strength and high in flowability; filling is full; the mortar is homogeneous and free from layering, segregation and bleeding; the mechanical properties and the durability are matched with the mortar of the original filling layer; in addition, a construction process is simple; the cost is low; and sources of the raw materials are not limited.

The invention discloses an environment-friendly colorful tile joint mixture. The environment-friendly colorful tile joint mixture is characterized by comprising the following components in percentage by weight: 35%-40% of white cement, 40.73%-47.75% of waste porcelain powder, 0-15% of quartz powder, 0-10% of titanium dioxide, 1%-1.5% of re-dispersible emulsion powder, 0.1% of water repellent, 0.15% of water-retaining agent, 0.4% of lignin fiber, 0.1%-0.25% of water reducing agent and 0-2% of pigment. The invention further discloses a preparation method of the environment-friendly colorful tile joint mixture. The consumption of quartz sand and heavy calcium powder is reduced by using the waste porcelain powder as the joint mixture filler; the early strength of the joint mixture is improved by virtue of early strength function of the white cement, so that the construction process requirements are satisfied. The waste porcelain powder is sintered at a high temperature, so that the physical and chemical performances are stable, the volume is stable, and the expansion-shrinkage coefficient is close to that of the tile; the material with the same expansion-shrinkage coefficient is used as the filler, so that the possibility that the tile joint mixture generates cracks can be further reduced.

The invention discloses fast rush-repair mortar for a ballastless track filling layer and a preparation method and an application thereof. The fast rush-repair mortar comprises the following components in parts by mass: 0.95-0.99 part of cement, 0.01-0.05 part of cement expansion admixture, 0.001-0.0025 part of fiber, 0.35-1.4 parts of macromolecular emulsion, 1.5-2 parts of sand, 0.001-0.005 part of thickening time control agent, 0.0004-0.01 part of antifoaming agent, 0.0001-0.003 part of gas forming agent, 0-0.01 part of air entraining agent, 0-0.02 part of water reducing agent, 0-0.001 part of rheology modifier and 0-0.3 part of water, wherein the cement and the cement expansion admixture account for 1 part in total. The rush-repair mortar disclosed by the invention has the advantages of fast setting and early strength and excellent thermal adaptability and application property, and guarantees recovery of railway operation in a skylight period of 4 hours in a severe cold area.

The invention provides emulsified asphalt for a ballastless slab track in a severe cold region and a preparation method thereof. The emulsified asphalt comprises the following ingredients by mass portion: 55-65 portions of matrix asphalt or modified asphalt, 35-45 portions of water, 0.1-1.0 portion of stabilizer, 0-1.0 portion of thickening agent, 0-2.0 portions of pH regulator, 0.1-1.5 portions of interfacial modifier, 0.6-1.8 portions of cationic emulsifier, 0.4-1.2 portions of non-ionic emulsifier, 0-1.0 portion of optional amphoteric ionic emulsifier and 0-0.6 portion of mineral emulsifier, wherein the emulsifier amounts to 1.0-4.0 portions. The emulsified asphalt has the advantages of high stability, good thermal adaptability, wide material adaptability, strong adhesive force with aggregate and the like, does not significantly influence the hydration of cement after the emulsified asphalt is mixed with the cement and sand, and is suitable for the ballastless slab track, particularly the ballastless slab tracks of CRTSI type high speed railways, passenger transport lines and interurban railways in the severe cold region.

This invention relates to a panel dreg-free emulsified asphalt-cement mortar used in orbits, its manufacturing method and an application including cement, mixed materials, emulsified asphalt, sand, water, polymer latex, defoaming agent, Al powder, an air entrainer and a regulator, which solves the problem of short working time, poor adaptability to temperature, easy separation, hard expansion after 24 hours of injection of the present emulsified asphalt-cement mortar and provides a panel dreg-free emulsified asphalt-cement mortar working long, well suitable to temperature, hard separated, easily expanding, low cost and raw materials are got easily.

The invention relates to a high-temperature-resistant plugging agent for a drilling fluid and a preparation method thereof. The high-temperature-resistant plugging agent is prepared from the following components by weight: 10 to 20 parts of a mineral fiber material, 10 to 30 parts of an asphalt particle, 20 to 30 parts of an inorganic elastic particle, 5 to 20 parts of fine rubber powder, 20 to 30 parts of ultrafine calcium carbonate and 0 to 5 parts of brown coal resin. The invention has the following beneficial effects: the plugging agent exerts a substantial plugging effect on holes and cracks and can form a plugging layer at a place near a borehole wall around a borehole in a short time, so invasion of solid particles and a filtrate is prevented, and borehole wall stabilizing and reservoir stratum protecting effects are exerted; and materials for preparation of the plugging agent are widely available, and the plugging agent has stable performance and adaptability to temperature, is environment friendly and can withstand a high temperature of 180 DEG C.

Special emulsified asphalt for railway or light-rail plated non-fragment rail and its manufacture are disclosed. The process is carried out by emulsifying by mineral, regulating by pH value, building up with other emulsifiers and blending for emulsifier and applier. Its advantages include excellent stability, compatibility, elasticity and endurance and higher ionic strength.

The invention relates to a hard sealing soluble bridge plug which comprises a body made of soluble metal. The body comprises a cone body, a slip and a guiding shoe which are connected from top to bottom; at least one metal sealing ring is arranged in a connecting position of the periphery of the cone body and the slip in a sleeving way; and the metal sealing ring is made of soluble metal. The hardsealing soluble bridge plug provided by the invention is applied to the field of fracturing yield increase operation of an oil gas well, so that the hard sealing soluble bridge plug can be more simply and conveniently stored, more stably sealed, and more firmly anchored; the setting success rate of the hard sealing soluble bridge plug is effectively improved; and the hard sealing soluble bridge plug better adapts to underground environment. In addition, the structure is simple and compact, and the processing and the manufacturing are easy, so that the cost of the soluble bridge plug is effectively reduced.

The invention discloses a method for improving the temperature applicability and accuracy modeling of an electrochemical-thermal coupling model, comprising the steps of testing and measuring an entropy thermal coefficient, wherein the entropy thermal coefficient of a battery is closely related to the heat production of the battery; establishing a lithium ion battery electrochemical model accordingto the measured entropy thermal coefficient and the electrochemical modeling control equation; establishing the electrochemical-thermal coupling model of a lithium ion battery by combining the lithium ion battery electrochemical model with the thermal characteristic equation of the lithium ion battery; establishing the correction functions S (T) and H (T) of the solid diffusion coefficient and reference reaction rate with temperature; introducing the correction functions into the electrochemical-thermal coupling model of the lithium ion battery; adding the tested and measured entropy thermalcoefficient in the electrochemical-thermal coupling model to the accuracy of the electrochemical-thermal coupling model along with the temperature change of the battery. By carrying out the temperature correction factor adjustment on the two parameters of the solid diffusion coefficient and the reference reaction rate constant, the electrochemical-thermal coupling model can be used for battery electrochemistry-thermal characteristic research at different temperatures and operating conditions, thereby improving the temperature adaptability of the model.

The invention discloses emulsified asphalt and a preparation method thereof. The emulsified asphalt comprises the following components in percent by weight: 60 to 65 percent of asphalt, 1.0 to 4.0 percent of complex emulsifier, 0.04 to 0.4 percent of stabilizing agent, 0.05 to 0.2 percent of thixotropic agent, 0.1 to 4 percent of aid and the balance of water. The emulsified asphalt for CRTS II type slab ballastless track cement-emulsified-asphalt mortar solves the main problems of poor stability, short available time, poor temperature adaptability, easy delamination and the like of the emulsified asphalt in the prior art. By adopting technology of complexing the emulsifier, various stabilizing agents are added, so the emulsified asphalt has the advantages of good emulsifying effect, good storage stability, good temperature adaptability of prepared cement-emulsified-asphalt mortar, long available time and no delamination, and can completely meet the requirement of cement-emulsified-asphalt mortar for ballastless track cushion of high speed railways.

The invention relates to emulsified asphalt for longitudinal connecting plate type ballastless track cement emulsified asphalt mortar. The emulsified asphalt comprises the following components in percentage by weight: 60 to 65 percent of asphalt, 0.2 to 5 percent of anionic emulsifier, 0.02 to 3 percent of stabilizing agent, 0 to 4 percent of assistant, and the balance being water; and the wax content of the asphalt is less than or equal to 2.2 percent. The emulsified asphalt for the longitudinal connecting plate type ballastless track cement emulsified asphalt mortar has good emulsifying effect, is not only suitable for storage and usage under normal temperature environment, but also suitable for storage and usage under the environment of lower temperature or higher temperature, and has the advantages of good storage stability, strong temperature adaptability and the like; and the cement emulsified asphalt mortar prepared by the emulsified asphalt has the advantages of long working time, large temperature adapting range, no layering, good filling property, good physical-mechanical properties, good durability, and the like. The emulsified asphalt is applied to a plate type ballastless track, and in particular the longitudinal connecting plate type (CRTS II type) ballastless tracks of high-speed railways and passenger dedicated lines.

The invention discloses a vibration film component, and relates to the technical field of electro acoustical products. The vibration film component comprises a vibration film, wherein the vibration film comprises a middle portion and a fold ring portion which wraps around the periphery of the middle portion. The vibration film furthermore comprises a vibration film base layer and a silica gel layer, wherein the silica gel layer is integrated in the vibration film base layer at least partially, the vibration film base layer is a polymer material layer, the silica gel layer is integrated in the surface of the fold ring portion, and the silica gel layer and the polymer material layer are injection molded. The vibrating film component achieves recombination of the silica gel layer and the polymer material layer by arranging the silica gel layer in the surface of the fold ring portion, and thereby improves compliance of the vibration film, enhances chemical stability and adaptability to temperature of the vibration film, optimizes acoustic performances, and improves products yield rate.

The invention belongs to the technical field of semiconductor processes, and in particular to a method for preparing a hybrid integrated fiber optic gyroscope optical chip. The chip comprises a substrate, a light source, a silicon-based 3dB coupler, a lithium niobate Y branch phase modulator and a signal detector, the silicon-based 3dB coupler is based on the silicon-based silicon dioxide opticalwaveguide technology and comprises a Y branch waveguide, two 90-degree circular arc waveguides, a tapered waveguide and two straight waveguides, which communicate with each other, a wide end of the tapered waveguide is used as an optical input port of the optical chip, the light source is aligned to the optical input port, the straight waveguide connected with a Y branch is used as a signal outputport of the optical chip, a photosensitive surface of the signal detector is aligned to the signal output port, and the straight waveguide connected with the 90-degree circular arc waveguide is usedas an optical transmission port and is spiced and fixed with a base waveguide end face of the lithium niobate Y branch phase modulator 3 through a waveguide coupling process. By adoption of the methodprovided by the invention, an optical fiber fusion point is removed, and the method has the advantages of high integration degree, small volume, low power consumption, good performance, good reliability and environmental adaptability, etc.

The invention discloses a preparation method for a titanic iron ore floatation collecting agent. The preparation method includes the following steps that vacuum gas oil No.5 dewaxing oil serves as raw oil; a fuming sulphuric acid solution serves as a sulfonating agent, and sulfonating reaction is performed on the raw oil and the sulfonating agent to obtain a sulfonated product; an NaOH solution is used for performing primary saponification on the sulfonated product to obtain sulfonate; the prepared sulfonate, soybean oleic acid and styryl phosphonic acid are compounded to be a mixture; secondary saponification is performed on the mixture after compounding through NaOH solution to obtain the anionic collecting agent. Compared with an existing titanium concentration collecting agent, the prepared titanic iron ore floatation collecting agent is simple in floatation agent rule, small in usage quantity of agents, excellent in floatation index and good in low-temperature floatation performance; the main components of the collecting agent are sulfonic acid and fatty acid, so that the collecting agent is small in influence on the environment and is a green product.

The invention discloses a nontoxic rubber color daub and a preparation method thereof. The preparation method is characterized by comprising the following steps: mixing 5 to 30 portions of rubber elastomer, 5 to 25 portions of white factice, 20 to 80 portions of mineral filler, 1 to 10 portions of bonding agent, 5 to 20 portions of plasticizing agent, 0.1 to 10 portions of pigment, and 0.5 to 3 portions of anti-aging agent with or without proper amount of auxiliary materials on a mixing machine at a temperature of 50 to 250 DEG C; and mixing the rubber elastomer and the white factice evenly first, then adding other components, and mixing the components evenly. The nontoxic rubber color daub is nontoxic and pollution-free, has strong temperature difference adaptability, good hand feeling and bright color, and can not only be used as a toy for children and a tool for artists to make models, but also can be used as a building joint filling material.

The invention discloses a preparation method of a wide-temperature range rare earth-based composite oxide denitration catalyst. The preparation method comprises that titanium dioxide and montmorillonite as carriers, ammonium metatungstate, ammonium metavanadate, cerium nitrate and manganese oxide as active components and accessory materials are subjected to blending, ageing decaying, kneading, molding, drying and roasting to form the wide-temperature range rare earth-based composite oxide denitration catalyst, wherein the accessory materials comprise monoethanolamine, citric acid, ammonia water, lactic acid, stearic acid, glass fibers, wood pulp, hydroxypropyl methyl cellulose, polyoxyethylene, citric acid and water. The preparation method utilizes the rare earth-based composite oxide as an active ingredient, shortens catalyst activation time, effectively controls a SO2 / SO3 conversion rate, improves a catalyst temperature adaptation capability, widens a catalyst use temperature range from 320-400 DEG C to 150-420 DEG C, has denitration efficiency more than 90%, and can carry out ammonia spraying denitration operation at a denitration area temperature of 150 DEG C when a boiler is started.

The invention discloses aqueous adhesive applied in the product of artificial leather electronics spanned with real leather fiber and the preparation method of the adhesive, which adopts that interpenetrating polymer network emulsion taking polyurethane as a housing and polyacrylic acid as a nucleus is firstly prepared, acrylate polymer emulsion which can seal the carboxyl in the aqueous polyurethane is then compounded, and a compound aqueous adhesive is obtained by blending the interpenetrating polymer network emulsion and the acrylate polymer emulsion according to a certain proportion. The aqueous adhesive not only remains the artificial leather characteristics of high intensity and elasticity and strong thermal adaptability of the polyurethane, but also remains the strong adhesiveness of the polyurethane to real leather and artificial leather, simultaneously, the water resistance and the aging resistance of the aqueous polyurethane are improved, therefore, the product of electronics spanned with real leather fiber is provided with simulation ability.

The invention discloses a flexible supporting method of a large-aperture lens, which comprises the steps of; firstly, machining three bosses on the excircle of a circular lens base with a certain thickness at intervals of 120 DEG , machining a connecting part with a cuboid structure on the outer side of each boss, machining an installing hole and a pin hole on the outer side of each boss along the radial direction of the lens base, machining an installing hole and a pin hole on the connecting part along the axial direction of the lens base, machining an installing hole on each boss along the axial direction of the lens base, and machining a small boss with a step on the inner side of each boss; secondly, machining three corresponding installing surfaces on the excircle of the lens at intervals of 120 DEG, and machining radial flexible elements and axial press plates; thirdly, bonding the radial flexible elements with the lens, and fixing the bonded assembly in the lens base through the installing holes and the pin holes; and finally, tightly pressing the lens through the axial press plates, and fixing the axial press plates through the installing holes. According to the supporting method disclosed by the invention, positioning precision of the lens is integrally improved, stress environment of the lens under an assembling condition is improved, and optical aberration such as field curvature, astigmatism and the like can be eliminated.

The invention discloses a single-point supporting flexible section for a small-aperture reflecting mirror of a space optical remote sensor, which belongs to the field of mechanical supporting. The supporting flexible section comprises a supporting mandrel body, three radial unloading troughs formed on the supporting mandrel body, three circumferential unloading troughs, three pasteboards and three clearances formed on the supporting mandrel body, wherein the pasteboards are arranged between the radial unloading troughs and the clearances; and the circumferential unloading troughs are formed in the pasteboards. The single-point supporting flexible section has small size and the maximum diameter of the single-point supporting flexible section is smaller than one third of the aperture of the reflecting mirror, so the single-point supporting flexible section can be processed and assembled conveniently and flexibly, and the installation space is saved; the reflecting mirror in which the single-point supporting flexible section is taken as a key supporting part is high in temperature adaptability, so when the external thermal deformation is transferred to the reflecting mirror through a mandrel, the deformation can be absorbed by the unloading troughs formed in two directions, which is equivalent to the process for shielding the reflecting mirror, so that the reflecting mirror is protected; and when the bonding working procedure is performed, the deformation energy produced by an adhesive layer during the solidification can be absorbed by the unloading troughs in two directions, so that the reflecting mirror is protected.

The invention discloses a portable water battery element and a water battery device comprising the same. The portable water battery element is composed of a carbonized cloth forming the anode, an anode extraction electrode electrically connected with the carbonized cloth, a salt-containing cloth tightly connected with the carbonized cloth, a piece of water-absorbing paper tightly connected with the salt-containing cloth, a cathode metal piece closely connected with the water-absorbing paper and forming the cathode, a cathode extraction electrode electrically connected with the cathode metal piece, and thermal contraction pipes pressing the carbonized cloth, anode extraction electrode, salt-containing cloth, water-absorbing paper, cathode metal piece and cathode extraction electrode. The water battery element and the water battery device comprising the same can be preserved for a long time and are convenient for storage and transportation; the water battery device can quickly supply power only by injecting water or other electrolytic driving liquid or other neutral liquid, and the voltage and current characteristics at initial and long-term usage are very good. In addition, the invention has the advantages of simple production process, low manufacturing cost, wide application and no pollution to the environment.

The invention discloses an electrolyte used for an ion state mixed crystal salt storage battery. The electrolyte comprises the following components in percentage by weight: 52-80% of hydrosulphate, 0.1-8% of corrosion inhibitor, 0.4-3% of antiager, 3-12% of strong acid salt agent, 0.1-10% of ester ion concentration control agent, 1-13% of lead-acid storage battery activating agent, 1-10% of chemically pure sulfuric acid of which the concentration is larger than or equal to 98%, and the balance of distilled water. The electrolyte disclosed by the invention has the advantages that the environment pollution caused by sulfuric acid in the electrolyte of the existing lead-acid storage battery is effectively avoided, a system is enabled to have stable and mild reactivity, the stable electrochemical performance of the storage battery is improved, the high and low ambient temperature adaptability is strong, the effective discharge capacity and the self discharge rate are small, and the service life of the battery can be effectively prolonged.

The present invention discloses a low carbon methanol gasoline composite additive and a preparation method thereof. The low carbon methanol gasoline composite additive is prepared ??from the following raw materials, by weight, 1.0-5.0 parts of an auxiliary solvent, 2.0-3.0 parts of a heat value increase agent, 0.5-2.0 parts of an anti-corrosion agent, and 0.5-1.0 part of an antioxidant. According to the present invention, a blending method is simple, methanol and gasoline can be really and uniformly mixed and dissolved to form a true solution, and good use effects can be achieved, such that the blended methanol gasoline has excellent performances, wherein the good use effects comprise that power does not drop, and start is easily achieved in winter.

The invention discloses a satellite-remote sensor flexible heat sinking joint, which belongs to the field of spatial remote sensor optical instruments using a satellite as a carrier. The satellite-remote sensor flexible heat sinking joint comprises a first supporting rod, a second supporting rod and a plurality of unloading grooves such as an unloading groove a, an unloading groove b and the like. The unloading groove a and an unloading groove d are positioned on the first supporting rod and are mutually parallel; the unloading groove b and an unloading groove c are positioned on the first supporting rod, are mutually parallel, and are mutually perpendicular to the unloading groove a and the unloading groove d; an unloading groove e and an unloading groove h are positioned on the first supporting rod and are mutually parallel; an unloading groove f and an unloading groove g are positioned on the first supporting rod, are mutually parallel, and are mutually perpendicular to the unloading groove e and the unloading groove h; the first supporting rod and the second supporting rod are arranged triangularly; and the unloading grooves on the second supporting rod are fully symmetrical with the unloading grooves on the first supporting rod. When a large spatial remote sensor is assembled and positioned, the system stability is optimal, and the satellite-remote sensor flexible heat sinking joint has higher vibration resistance. A stress environment in a working process is improved, so that the remote sensor is in a favorable working condition, and the imaging quality is guaranteed.

The invention discloses a photovoltaic power generating device based on a direct current bus. The photovoltaic power generating device comprises a current acquiring unit, a voltage acquiring unit, a control unit, a mode control unit, a driving circuit and a plurality of photovoltaic battery pack string units respectively connected with the direct current bus in parallel; each photovoltaic battery pack string unit comprises a battery pack string and a boost circuit; the battery pack string is connected with the direct current bus through the boost circuit; an input end of each of the current acquiring unit and the voltage acquiring unit is connected with the battery pack string; and an output end of each of the current acquiring unit and the voltage acquiring unit is connected with an input end of the control unit; an output end of the control unit is connected with the mode control unit; and an output end of the control unit is connected with a switching tube of the boost circuit through the driving circuit. The photovoltaic power generating device has the advantages of high generating efficiency, less power consumption, flexible system structure and good sunlight intensity and thermal adaptability.

The invention relates to a preparation method of a double-layer high-temperature-resistant heat-insulating wave-absorbing composite material, which belongs to the technical field of wave-absorbing material preparation. In the present invention, aluminum trichloride, zirconium carbonate and other materials are first prepared to obtain ceramic fiber powder, then nano-titanium dioxide and coupling agent are added to deionized water for mixing, then ceramic fiber powder is added, and after ultrasonic dispersion, heated and stirred to obtain a slurry solution, the The slurry solution and water glass are mixed, poured, molded and sintered to obtain a matrix material, and the wave-absorbing coating prepared by epoxy resin is coated on the surface of the matrix, and after curing, a double-layer high-temperature-resistant heat-insulating wave-absorbing composite material can be obtained. It is a ceramic fiber material with a porous structure, not only has high resistivity, but also has low thermal conductivity and good high temperature resistance. After being combined with the outer coating, it can quickly absorb and attenuate electromagnetic waves, with high absorption efficiency, wide frequency, light weight, Excellent mechanical properties, the coating is firmly combined with the base layer through the coupling agent, and it is not easy to fall off.

The invention relates to a furnace lining material for a converter extracting vanadium and a preparation method thereof. The technical scheme adopts the following steps: mixing 50-85 percent by weight of fused magnesite, 3-30 percent by weight of SiC, 9-15 percent by weight of crystalline flake graphite fine powder and 3-5 percent by weight of antioxidant; additionally adding 2-4 percent by weight of phenolic resin into the mixed material; uniformly mixing the material in a mixing mill; forming by pressing of a machine and drying at the temperature of 250-300DEG C for 16-24h, wherein the antioxidant is more than one of metallic aluminum, a simple substance silicon and B4C and the grain diameter of the antioxidant is less than 0.088m; the content of MgO in the fused magnesite is more than 97 percent and the grain diameter of the fused magnesite is less than 5mm; the grain diameter of the SiC is les than 1mm; and the grain diameter of crystalline flake graphite is less than 0.088mm. The product has the characteristics of low porosity, small average pore size, uniform pore distribution, high temperature and strength, strong adaptability to vanadium-titanium slag and long service life.

The invention belongs to the technical field of hydrogen storage materials, and particularly relates to a preparation method of a metal oxide composite magnesium hydride hydrogen storage material. Themethod comprises the steps that magnesium hydride serves as a base material, metal oxide particles are mixed, the mass percentage content of metal oxide in the mixture is 1%-8%, and the mixture is subjected to hydrogen filling ball milling in a ball mill to obtain the metal oxide composite magnesium hydride hydrogen storage material. By adding the nanoscale metal oxide particles, the hydrogenation speed of the magnesium-based composite powder in the hydrogen charging ball milling process can be increased, and reduction of the particle size of magnesium hydride is facilitated; the nanocrystalline MgH2 is coated with the metal oxide to form a core-shell structure with an excellent synergistic effect, the core-shell structure has a good catalytic effect and remarkable dynamic performance, the hydrogen storage reaction speed can be improved, microcell heat release can be controlled, agglomeration of a hydrogen storage reactant Mg (OH) 2 can be effectively eliminated through the metal oxide, and the hydrogen storage efficiency is improved. Therefore, the purpose of sufficient hydrolysis reaction is achieved.