137results about How to "Improve high temperature performance" patented technology

The invention discloses a cold-mixed and cold-laid ultrathin overlay asphalt mixture which is prepared from the following raw materials in parts by weight: 8-15 parts of rubber powder composite emulsified asphalt; 80 to 90 parts of aggregate; 0.3 to 0.5 part of polymer fiber; 0.5 to 1 part of an interface coupling agent; the invention also provides a construction process of the cold-mixed and cold-laid ultrathin overlay asphalt mixture. The rubber powder composite emulsified asphalt is obtained by emulsifying the composite modified asphalt prepared from the ground rubber powder of the waste tires and the SBS rubber, so that the performance index of the emulsified asphalt is greatly improved, and the bonding performance of a cold-mixed thin-layer asphalt mixture and an original pavement is ensured; in addition, by adding the polymer fibers, the structural strength and the crack resistance of the ultrathin overlay can be remarkably improved. The invention can significantly reduce energy consumption and environmental pollution, and has the advantages of noise reduction, environmental protection, low cost and the like.

The invention relates to the technical field of alloys, in particular to a Ni3Al-based alloy, a test bar, a turbine disc and a preparation method of the Ni3Al-based alloy. The invention discloses a Ni3Al-based alloy which comprises the following components in percentage by mass: 7%-9% of Al, 7%-8.5% of Cr, 0.13%-0.24% of C, 0.5%-2% of Ti, 3%-6% of Mo, 1%-3% of W, 1%-2% of Hf, 0.005%-0.03% of B and the balance of Ni. According to the Ni3Al-based alloy disclosed by the invention, all the elements are coordinated and matched, so that the Ni3Al-based alloy has a long-range ordered crystal structure, a stable high-temperature phase structure and excellent oxidation resistance, mechanical property and high-temperature property.

The invention discloses an anti-stripping warm mix asphalt regenerant with high and low temperature performances. The regenerant comprises the following components: a common asphalt regenerant; a viscosity reducer; a crosslinking curing agent; a slow crosslinking agent; the mass ratio of the common asphalt regenerant to the viscosity reducer to the cross-linking curing agent to the slow cross-linking agent is 100: 10: (30-90): 5. The regenerant can enhance workability and reduce carbon emission in the regeneration process of the aged asphalt mixture, the regenerated asphalt mixture has excellent high-temperature deformation resistance, low-temperature crack resistance and stripping resistance, the engineering problems of low-carbon regeneration and durable service of the aged asphalt mixture can be greatly solved, the preparation process is simple, the cost is low, and the method is suitable for industrial production. The process is low-carbon and efficient, equipment does not need to be transformed and upgraded, the resource utilization rate is high, and economic, environmental and social benefits are remarkable.

The invention discloses a high-temperature-resistant spliced nested honeycomb pyramid wave-absorbing material as well as a preparation method and application thereof. The high-temperature-resistant spliced nested honeycomb pyramid wave-absorbing material is formed by splicing a plurality of hollow honeycomb pyramid unit arrays and a bottom honeycomb plate, the outer part of each hollow honeycomb pyramid unit is formed by splicing four triangular or trapezoidal honeycomb sheets with saw-toothed edges, and a hollow honeycomb pyramid with a smaller size can be nested in each hollow honeycomb pyramid unit and is wholly impregnated with wave-absorbing slurry. A wave-absorbing agent in the wave-absorbing slurry is one or more of conductive carbon black, conductive carbon fiber, conductive graphite, multi-walled carbon nanotubes, graphene, carbonyl polycrystalline iron fiber, cobalt-based amorphous wires or iron-based amorphous powder. The wave-absorbing performance of the material can be improved, high temperature resistance is achieved, heat concentration is reduced, the use amount of raw materials is reduced by adopting the spliced and nested hollow structure, the cost is low, the structural stability is improved, the service life is prolonged, meanwhile, light weight is achieved, high design flexibility is achieved, and the preparation difficulty and the later maintenance difficulty are reduced.

The invention relates to a fiber-reinforced aerogel composite material containing a carbon and titanium dioxide biphase hybrid opacifying agent as well as a preparation method and application of the fiber-reinforced aerogel composite material. The fiber reinforced aerogel composite material containing the carbon and titanium dioxide dual-phase hybrid opacifying agent comprises an inorganic aerogel matrix, wherein a reinforced fiber skeleton and the carbon / titanium dioxide dual-phase hybrid opacifying agent are dispersed in the inorganic aerogel matrix; the carbon / titanium dioxide biphase hybrid opacifying agent comprises a titanium dioxide shell layer and carbon / titanium dioxide core-shell structure particles, wherein the surface of a reinforced fiber skeleton is coated with the titanium dioxide shell layer in situ; gaps of the reinforced fiber skeleton are filled with the carbon / titanium dioxide core-shell structure particles. The problem to be solved is to construct a two-phase hybrid shading system in which carbon / titanium dioxide core-shell particles and a titanium dioxide coating layer on the fiber surface are combined through one-step in-situ synthesis, so that the heat insulation capacity of the composite material in a high-temperature environment is synergistically improved.

The invention relates to the technical field of road materials, in particular to an asphalt raw material for SBS polymer modified asphalt and modified asphalt. The asphalt raw material for the SBS polymer modified asphalt comprises the following components in percentage by mass: 9-16% of saturate; 43%-53% of aromatic component; 22%-28% of colloid; 9%-12% of asphaltene; the penetration of the asphalt raw material for the SBS polymer modified asphalt at 25 DEG C is 63-750.1 mm; the dynamic viscosity at 60 DEG C is less than or equal to 240 Pa.s; the penetration ratio is greater than or equal to 65%; the instability index of the colloid is 0.2-0.4; the weight-average molecular weight of the asphalt raw material for the SBS polymer modified asphalt is 1400 to 2200 g / mol. By optimizing the raw material components of the asphalt, the produced modified asphalt has better high-temperature performance, low-temperature performance, anti-aging performance and storage stability, the production efficiency is improved, and the cost is reduced.

The invention relates to the technical field of batteries, in particular to a composite positive electrode material and a preparation method and application thereof. The composite positive electrode material comprises a base material and a perovskite phase coating layer coating the surface of the base material, the chemical formula of the base material comprises LiNi < x > Co < y > Mn < 1-x-y-z > M < z > O < 2 >, 1, 0 < = y < lt >; 0 < = zlt; 0.2, x + y + zlt; 1, the chemical formula of the perovskite phase coating layer comprises AQO3, A is at least one of Ca, Sr and Ba, and Q is Ti or Zr. According to the composite positive electrode material, the uniform perovskite phase coating layer is arranged on the surface of the base material, so that the surface residual alkali can be remarkably reduced, the side reaction on the surface of the material is slowed down, and the thermal stability and the cycle performance of the composite positive electrode material are improved.

The invention discloses high-viscosity and high-elasticity modified asphalt and an asphalt composition, belongs to the field of asphalt, and solves the technical problem that the existing asphalt material lacks high-viscosity and high-elasticity modified asphalt suitable for diversified climates. The high-viscosity and high-elasticity modified asphalt suitable for diversified climates is prepared from the following raw materials in parts by mass: 100 parts of road petroleum asphalt, 2.5-4 parts of an epoxidized modified styrene-butadiene-styrene block copolymer, 5-10 parts of a hyperbranched polyester modified styrene-isoprene-styrene block copolymer, 5-10 parts of tackifying resin, 1-3 parts of a coupling agent, 1-3 parts of a coupling agent, 1-3 parts of a coupling agent, 1-3 parts of an antioxidant and 1-3 parts of a lubricant. The modified asphalt is prepared from, by weight, 1-2 parts of rubber powder, 1-2 parts of oleamide, 2-3 parts of bagasse fibers and 2-10 parts of other functional auxiliaries. The modified asphalt has the advantages of being high in viscosity and elasticity, suitable for various climates and the like.

The invention discloses a method for preparing a surface high-entropy metallization layer based on Joule thermal shock to assist brazing of a large-size ceramic matrix composite and a niobium joint, and belongs to the field of brazing. The method aims at solving the problem that the residual stress of existing brazing connection of the C / SiC composite material and niobium is too large. The method comprises the following steps: 1, coating alloy mixed liquid; 2, carrying out high-entropy alloying on the surface of the C / SiC composite material; 3, assembling a to-be-welded part; and 4, vacuum brazing. The method is used for preparing the surface high-entropy metallization layer based on Joule thermal shock to assist brazing of the large-size ceramic matrix composite and the niobium joint.

The invention discloses an engine valve guide pipe and a preparation process and application thereof, the valve guide pipe is formed by plating a working surface of a Fe-based alloy matrix by adopting a magnetron sputtering process, and the Fe-based alloy matrix consists of C, N, Co, Cr, Ni, W, Ti, Mn, Al, Cu, V, S, Mo, Mg, Nb, Si, a toughening and cutting additive, a solid lubricant, hard particles and the balance of Fe. The valve guide pipe is prepared through the technological processes of additive preparation, burdening and powder mixing, mold wall lubricating, warm-pressing forming, sintering, siphon copper infiltration, heat treatment, finish machining and magnetron sputtering of the transition layer and the functional plating layer, has excellent hardness and strength and high compactness and further has good corrosion resistance, high-temperature wear resistance and good machining performance, and the service life of the valve guide pipe is prolonged. And the lubricating oil is suitable for working condition requirements including but not limited to hydrogen, natural gas, LPG gas, oil-gas hybrid power, fuel oil engines and the like in environments of high temperature, dry friction, impact, gas corrosion and the like.

The invention provides a solid waste-emulsified asphalt cold recycled mixture and a preparation method thereof, and belongs to the technical field of road engineering materials. According to the invention, asphalt mixture reclaimed materials (RAP), new aggregates, mineral powder, a cementing material, water and emulsified asphalt are used as raw materials, wherein the cementing material adopts blast furnace slag powder and fly ash to replace part of cement. By improving the mixing process, the cold recycling mixture is mixed more uniformly, so that the asphalt film thickness distribution on the surfaces of different types of aggregates after demulsification of the emulsified asphalt is uniform; the macroscopic pavement performance such as volume parameters, mechanical strength, water stability, high-temperature performance and low-temperature performance of the blast furnace slag powder-fly ash-emulsified asphalt cold recycled mixture sample is effectively improved.

The invention discloses a preparation method of a high-temperature wear-resistant multilayer material on the surface of a precision part, and relates to a preparation method of a high-temperature wear-resistant coating on the surface of the precision part. The invention aims to solve the technical problem of poor wear resistance of the surface coating of the precision part at high temperature at present. According to the invention, a magnetron sputtering multi-target co-sputtering mode is adopted, a laminated composite film is formed on the surface of a precision part such as a shaft, and selected target materials are a CoCrFeNi target, a Ti target and a CuNb target. In the preparation process of the multi-layer film, due to the fact that a large number of interfaces exist and can effectively hinder dislocation movement, and a large number of self-lubricating matter phases are matched together, the hardness and abrasion resistance of the material are improved, and the service life of the multi-layer film is prolonged. And the multilayer film structure can optimize the high-temperature phase transformation resistance of the whole coating by adjusting the thickness ratio and high-temperature elements between the layers, so that the high-temperature performance of the coating is remarkably improved, and the high-temperature wear resistance of the CoCrFeNi / Ti / CuNb multilayer material is more excellent.

The invention discloses a multistage phase-change temperature-regulating asphalt pavement structure for relieving urban heat island effect, which sequentially comprises an upper surface layer, a lower surface layer, a base layer and a subbase layer from top to bottom, the upper surface layer is formed by a first asphalt mixture doped with a wide-temperature-range phase-change temperature-regulating system A, and the lower surface layer is formed by a second asphalt mixture doped with a wide-temperature-range phase-change temperature-regulating system B; the volume of the wide-temperature-range phase-change temperature-adjusting system A is 7-10% of the volume of the first asphalt mixture, and the wide-temperature-range phase-change temperature-adjusting system A is formed by compounding a plurality of different composite organic eutectic phase-change materials; the lower surface layer is formed by a second asphalt mixture doped with a wide-temperature-range phase-change temperature-adjusting system B, the volume of the wide-temperature-range phase-change temperature-adjusting system B is 5-10% of that of the second asphalt mixture, and the wide-temperature-range phase-change temperature-adjusting system B is formed by compounding a plurality of different composite organic eutectic phase-change materials. The composite organic eutectic phase change materials with different wide temperature range phase changes are introduced into the upper surface layer and the lower surface layer of the asphalt pavement respectively, and heat in the pavement structure can be greatly absorbed through combination of the organic eutectic phase change materials.

The present invention belongs to the technical field of refractory materials, and specifically relates to a refractory brick for a carbon roasting furnace and a preparation method thereof. The refractory brick for a carbon roasting furnace provided by the present invention comprises large particles of bauxite clinker, large particles of mullite, medium particles of bauxite clinker, additive powder, alumina powder, and a binder; the additive powder is composed of andalusite powder, silica powder and corundum powder in a mass ratio of 4-8:13-17:11-15. In the present invention, andalusite, silica and corundum are used to form additives together, which effectively improves the high temperature performance of refractory bricks for carbon roasting furnaces; forsterite, ferric oxide and magnesium oxide are added to the formula, which effectively improves the density and bonding strength of refractory bricks for carbon roasting furnaces. The refractory bricks for a carbon roasting furnace provided by the present invention have low apparent porosity, low high temperature creep rate, high load softening temperature, stable high temperature volume, good thermal stability and long service life.

The invention relates to the technical field of dust removal filter materials, in particular to a fiber composite needled filter material and a preparation method thereof. In order to enhance the high-temperature performance of the needle-punched filter material, a modified carbon fiber material is added into polyethylene glycol terephthalate; according to the preparation method disclosed by the invention, the surface of the nano carbon fiber is subjected to carboxylation treatment after being subjected to oxidation treatment, a fluorine element is introduced into the surface of the carbon fiber on the basis, and a structure similar to ethylene glycol terephthalate is further prepared on the surface of the carbon fiber; therefore, the compatibility and the bonding strength between the carbon nanofibers and the polyethylene terephthalate are greatly improved; meanwhile, the fluorine element introduced in the process can greatly improve the stability of the polyester fiber at high temperature and enhance the resistance of the polyester fiber to chemical erosion such as acid and alkali, so that the service life of the filter material in high-temperature flue gas is prolonged.

The invention discloses an H2 and CO erosion resistant Al2O3-Cr2O3 refractory material for a hydrogen-based shaft furnace and a preparation method of the H2 and CO erosion resistant Al2O3-Cr2O3 refractory material. The H2 and CO erosion resistant Al2O3-Cr2O3 refractory material comprises the following raw materials in parts by weight: 30-40 parts of chrome corundum particles with the particle size of 4-1mm; 10-15 parts of aluminum chromium slag particles with the particle size of 1-0 mm; 10-20 parts of fused brown aluminum oxide particles with the particle size of 3-1 mm; 20-30 parts of fused white corundum powder with the particle size of less than 0.074 mm; 5-10 parts of alumina micro powder with a particle size of less than 6 [mu] m; 3-5 parts of chromium oxide green with a particle size of less than 0.074 mm; 3-4 parts of phosphoric acid; and 3-10 parts of erbium oxide. The invention has good H2 and CO gas erosion resistance, slag corrosion resistance and stable high-temperature performance, and is convenient for construction and use, so that the overall service life of the hydrogen-based shaft furnace is prolonged.

The invention discloses a composite carbon-coated graphite negative electrode material and a preparation method and application thereof.The negative electrode material is of a coating structure, an inner core comprises graphite, a coating layer comprises graphitized carbon and hard carbon, the graphitized carbon and the hard carbon are evenly distributed, more lithium intercalation active sites are provided for the surface of the graphite, and meanwhile the surface of the graphite is coated with the composite carbon. And the high-temperature performance deterioration of the material is effectively reduced. According to the negative electrode material, the epoxy asphalt is used as a coating agent raw material, a resin-based component and an asphalt component which exist in the epoxy asphalt at the same time are subjected to carbonization treatment and graphitization treatment to obtain a hard carbon and graphitized carbon composite carbon coating layer which is uniformly distributed, and compared with coating of hard carbon or soft carbon, the composite carbon coating layer has the advantages that the coating effect is good; and the material has excellent quick-charging performance and good high-temperature performance. When the lithium ion battery electrolyte is applied to a lithium ion battery, the dynamic performance test shows that lithium is not separated out or slightly separated out, and the electrolyte has excellent fast charging performance; the capacity recovery rate can reach 80.3-91.9% after being stored for 100 days at the high temperature of 60 DEG C, and the high-temperature performance is good.

The invention provides a lithium ion battery electrolyte and application thereof, the electrolyte comprises: a non-aqueous solvent, the non-aqueous solvent comprises a first solvent and a second solvent, the first solvent is selected from at least one of perfluorohexanone, decafluoropentane or 2, 2-bis (trifluoromethyl)-1, 3-dioxolane, and the second solvent is selected from at least one of perfluorohexanone, decafluoropentane or 2, 2-bis (trifluoromethyl)-1, 3-dioxolane; a lithium salt; and an additive, the additive comprises a first additive, and the first additive comprises triallyl isocyanurate. According to the lithium ion battery electrolyte and the application thereof provided by the invention, the obtained electrolyte can be applied to a high-energy-density lithium ion battery, the fast charging performance of the lithium ion battery is improved, the cycle performance of the lithium ion battery is improved, and the high-temperature performance of the battery is improved.

The invention discloses a hydrogen engine powder metallurgy valve seat ring and a preparation method thereof, and belongs to the technical field of powder metallurgy manufacturing, the valve seat ring is composed of a Fe-based alloy matrix and a working face magnetron sputtering plating layer, and the valve seat ring is prepared from, by mass, 0.6%-1.2% of C, 4.0%-7.0% of Cr, 0.8%-1.2% of Ti, 0.8%-1.2% of Nb, 2.5%-5.8% of V, 2.0%-4.0% of W, 3.5%-7.0% of Mo, 2.0%-2.5% of Co, 1.5%-2.0% of Mn, 1.0%-2.0% of Al and the balance Fe. 1.0%-1.5% of a solid lubricant and the balance of Fe, and the particle size is 100-120 meshes. The hydrogen engine powder metallurgy valve seat ring has the advantages that the hydrogen engine powder metallurgy valve seat ring is prepared through the warm pressing-die wall lubrication technology and the like, has excellent hardness and strength, high compactness, corrosion resistance, high abrasion resistance, high-temperature performance, hydrogen embrittlement resistance and hydrogen corrosion resistance and is suitable for hydrogen engines of automobiles, ships, military heavy equipment and the like.

The invention discloses a preparation method of an in-situ cured lithium battery and the in-situ cured lithium battery, and relates to the technical field of lithium batteries. A fluorinated alkyl modified polyamide monomer or fluorinated alkyl modified polyacrylate monomer which is relatively stable to water and oxygen is added in a negative electrode slurry mixing process, and a fluorinated alkyl group is introduced, so that the chemical stability of the polymer is remarkably improved, and hydrolysis or oxidation is not easy to occur when the fluorinated alkyl group is added in the negative electrode slurry mixing process; and subsequently, a small amount of initiator is added into the electrolyte for in-situ thermal polymerization to form the semi-solid electrolyte. Only a small amount of initiator is added into the electrolyte, so that the problems that the viscosity of the electrolyte is increased and the conductivity is reduced due to the fact that the monomer and the initiator are added into the electrolyte together during preparation of the electrolyte in a traditional scheme are solved; in addition, advanced polymerization during transportation or long-term shelving can be avoided, so that the application efficiency and in-situ curing uniformity of the gel semi-solid electrolyte are remarkably improved, and the high-temperature performance of the battery is also improved while the rate capability is not degraded.

The invention relates to the technical field of refractory material preparation, in particular to a preparation method of an energy-saving refractory material for an RH refining furnace, and the preparation method comprises the following steps: S1, raw material pretreatment, S2, ball-milling mixing, S3, vibration molding, and S4, sintering treatment. The high-purity magnesia, corundum, zirconium oxide, Y2O3, silicon carbide and carbon fibers are pretreated, impurities are removed, the crystallinity is improved, and the crystal structure is stabilized; the two-way vibration molding treatment can enable the mixture to be more tightly arranged in the mold, so that the compactness of a green body is improved, and the heat insulation performance and the energy-saving effect of the refractory material are improved; according to the method, firstly slow heating and heat preservation are controlled, so that organic matters, impurities and the like in the green body can gradually react or be discharged, meanwhile, thermal stress caused by too fast heating is avoided, and the refractory material can adapt to complex high-temperature, strong-corrosion and other working environments of the RH refining furnace through the raw material combination in the method, so that the service life of the refractory material in the RH refining furnace is prolonged, and energy consumption is reduced.

The invention discloses a battery diaphragm, a preparation method thereof and a secondary battery. The battery diaphragm comprises a base membrane and a coating, wherein the coating is positioned on at least one surface of the base membrane; the coating comprises a polymer and an electrolyte; the electrolyte includes at least one additive. When the battery diaphragm is assembled into a battery, the high-temperature cycle retention rate and the high-temperature storage performance of the battery can be remarkably improved.

The invention relates to a corundum spinel castable with low thermal conductivity and high corrosion resistance and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: firstly, taking 35.0 to 47.0 weight percent of recycled aluminum oxide ceramic, 25.0 to 34.0 weight percent of light-burned spinel aggregate, 13.0 to 19.0 weight percent of recycled zirconia corundum bricks, 6.0 to 9.0 weight percent of alpha aluminum oxide, 2.0 to 5.0 weight percent of fused magnesia and 1.5 to 4.5 weight percent of hydratable aluminum oxide as raw materials, adding 3.5 to 4.5 weight percent of binding agent and 0.05 to 0.08 weight percent of fiber, and uniformly mixing, so as to obtain the corundum spinel castable with low thermal conductivity and high corrosion resistance. The method has the characteristics of energy conservation, high efficiency, environment friendliness and low cost; the prepared corundum spinel castable with low thermal conductivity and high corrosion resistance is excellent in thermal shock resistance, high in mechanical strength and relatively high in use temperature.

The invention relates to the technical field of preparation of modified asphalt, in particular to SBS modified asphalt and a preparation method thereof. The SBS modified asphalt provided by the invention is prepared from the following raw materials: matrix asphalt, a linear SBS modifier 791H, a star SBS modifier 4306 and an auxiliary agent, the auxiliary agent is selected from one or two of aromatic oil, naphtha, a stabilizer and furfural extract oil. The modified asphalt prepared by the invention has high storage stability and ageing resistance, the high-temperature performance and water stability are remarkably improved, and the overall performance is better than that of linear SBS modified asphalt. According to the high-stability SBS modified asphalt disclosed by the invention, the storage stability problem is solved, various properties and pavement performance of the SBS modified asphalt are integrally improved, and the high-stability SBS modified asphalt is simple and convenient to prepare, short in processing flow, simple in equipment, mild in process condition, rapid in production and low in modification cost.

The invention provides a wet-process injection material for a bosh, a bosh and the lower part of a furnace body of an iron-making blast furnace and a preparation method of the wet-process injection material. The injection material comprises the following components in parts by weight: 3-9 parts of tabular corundum particles of 3-6 mm, 23-33 parts of titanium corundum particles of 1-3 mm, 10-20 parts of titanium corundum particles of 0-1 mm, 0-6 parts of 88 high bauxite particles of 0-1 mm, 0-8 parts of 97 silicon carbide particles of 0-1 mm, 4-12 parts of 97 silicon carbide 45M powder, 6-13 parts of titanium corundum 200M powder, 4-8 parts of tabular corundum 325M powder and 4-7 parts of 71 pure calcium aluminate cement. The invention relates to a high-strength concrete, which is prepared from the following components in parts by weight: 5 to 10 parts of aluminum oxide micro powder, 5 to 10 parts of 96 silicon dioxide micro powder, 0.05 to 0.1 part of additive 1, 0.03 to 0.07 part of additive 2, 0.01 to 0.03 part of additive 3 and 0.05 to 0.1 part of additive 4. The wet-process injection material is used for being sprayed on the bosh, the bosh and the lower part of a furnace body of an iron-making blast furnace for lining making, so that the furnace shape can be quickly recovered, and various performance indexes such as high-temperature performance, wear resistance and slag iron corrosion resistance of the material can be improved, and the service life of the material on the parts can be greatly prolonged.

The invention relates to the technical field of alloy preparation, particularly provides a 650 DEG C high temperature resistant titanium-based composite material plate, and further provides a preparation method of the plate. The titanium-based composite material plate resistant to the high temperature of 650 DEG C, provided by the invention, is prepared from the following chemical components in percentage by mass: 6.0 percent to 7.0 percent of Al, 1.0 percent to 3.0 percent of Zr, 0.5 percent to 2.0 percent of Mo, 0.4 percent to 1.0 percent of Nb, 0.4 percent to 1.0 percent of W, 0.1 percent to 0.4 percent of Si, 0.4 percent to 0.7 percent of B, 0.01 percent to 0.10 percent of C and the balance of Ti and inevitable impurities. According to the titanium-based composite material component system provided by the invention, a vanadium element which is easy to generate interface reaction at high temperature is abandoned, and refractory metal elements such as niobium and tungsten are adopted to cooperate with a ceramic reinforced phase formed by boron, carbon and the like, so that the high-temperature performance and the thermal stability of the material are improved; meanwhile, by controlling the content of molybdenum, aluminum and other elements within a specific interval, the hot working performance of the material is remarkably improved while high strength is maintained, and the contradiction between insufficient high-temperature performance and poor hot working performance of a traditional titanium-based composite material is effectively solved.

This invention belongs to the field of sodium-ion batteries, and relates to a fluorophenylphosphonate, its preparation method, and its application in sodium-ion batteries. The fluorophenylphosphonate includes di(trifluoroisopropyl)phenylphosphonate or di(hexafluoroisopropyl)phenylphosphonate; the preparation steps are as follows: using fluoroalcohol and phenylphosphonyl dichloride as raw materials, triethylamine as an acid-binding agent, and diethyl ether as a reaction solvent, the fluorophenylphosphonate is prepared by a condensation substitution reaction. Sodium-ion batteries prepared using fluorophenylphosphonate exhibit high ionic conductivity and an electrochemical stability window. This phosphonate additive preferentially decomposes at the electrode interface, inducing the formation of a thin, dense, uniform electrode-electrolyte interface phase rich in NaF inorganic components, and giving the electrolyte excellent flame-retardant properties. Sodium-ion batteries assembled with positive electrode materials exhibit good rate performance and cycle stability, with a cycle life exceeding 5000 cycles at room temperature. Simultaneously, this electrolyte also exhibits excellent cycle performance at a high temperature of 60°C.

The invention relates to a low-concentration electrolyte suitable for prussian blue and hard carbon sodium ion batteries. The sodium-ion battery electrolyte is prepared by mixing a sodium salt, an ester organic solvent and a cosolvent, wherein the concentration of the sodium salt in the ester organic solvent is 0.04 to 0.86 mol / L. Due to the low concentration, the overall viscosity of the electrolyte can be reduced, the wettability of the electrolyte can be improved, the diffusion coefficient of sodium ions can be increased, and the cost of the electrolyte can be reduced to a certain extent. Through the unique solvation structure of the sodium salt and the ester organic solvent, a stable inorganic-rich solid electrolyte interface film with high ionic conductivity can be constructed on the surface of an electrode material, so that the electrolyte also has excellent performance at high temperature. The electrolyte disclosed by the invention is simple in preparation method and relatively low in cost, and has a considerable industrial application prospect.

An inorganic high temperature resistant grouting material and a preparation method thereof The present invention provides an inorganic high temperature resistant grouting material, wherein the components and mass fractions in the inorganic high temperature resistant grouting material are: 30-35 parts of high temperature resistant cement, 30-40 parts of plate-shaped corundum, 13-18 parts of quartz sand, 4-8 parts of calcium sulfate whiskers, 0.10-0.15 parts of water reducer, 0.01-0.06 parts of defoamer, 0.01-0.06 parts of plastic expansion agent, 9-14 parts of silica sol, 0.5-1.0 parts of water-based graphene slurry, and 3-7 parts of water. After curing, the grouting material has a smooth surface, no bulging, no cracking, and no powdering, and can be used for a long time at a high temperature of 500°C.

The utility model relates to the technical field of silicon powder heating, specifically relates to a heating device for powder purification of direct pulling method, including heating block, the lower part of heating block is provided with the footboard, the footboard is connected with heating block through the connecting device, the connecting device includes the connecting hole of setting at the top of footboard, the bottom of connecting hole is provided with the plug pipe, a plurality of expansion joints are provided on the pipe body of plug pipe, improve the fixed effect of connection, guarantee the safe use, prolong the life, reduce the production cost.