2590 results about "Material technology" patented technology

An integrated carbon honeycomb structure material and its preparation method are disclosed, belonging to the field of carbon materials technology. Based on a co-sacrificial template low-temperature pyrolysis strategy, the target material can be obtained through three main steps: preparation of a metal salt-colloidal microsphere template precursor, precursor pressing and molding, and subsequent calcination and carbonization. This technology has the characteristics and advantages of simple preparation process, regular and controllable macroscopic structure of the sample (such as shape, area, and thickness), rich and tunable chemical composition, and three-dimensional interconnection of graphene carbon matrix. It has great application potential in many fields such as electrochemical energy storage, catalysis, gas separation, adsorption, and electromagnetic shielding.

The invention relates to the technical field of biomedical ceramic materials, in particular to a zirconia-based biomedical ceramic material and a preparation method thereof.The preparation method comprises the following steps: preparing a zirconia-based biomedical ceramic material on the basis of preset opening degrees of air channels of a first heating part and a second heating part in a heating assembly and a preset working state of a first stirring structure; synchronously and continuously adding a plurality of to-be-reacted substances into the first space of the container for primary reaction; after the interval is fixed, opening a circulation channel based on a preset liquid channel opening degree of the circulation channel of the first space and the second space of the container, so that the material in the first space flows into the second space, and performing a second-section reaction at a preset second temperature and a preset rotating speed of a second stirring structure to generate a precipitate; according to the invention, the materials to be reacted can be heated at a stepped temperature, and the reaction process is fully adjusted according to the ion concentration and uniformity in the detected solution, so that the high-precision preparation of the zirconium oxide-based biomedical ceramic material is stably and efficiently carried out.

The invention relates to the technical field of tunnel engineering building materials, in particular to a double-slurry synchronous grouting material based on shield silty-fine sand and a preparation method of the double-slurry synchronous grouting material based on shield silty-fine sand. The liquid A is prepared from, by weight, 20%-30% of cement, 30%-50% of shield silty-fine sand, 5%-10% of bentonite, 5%-15% of mineral admixture, 0.1%-0.5% of stabilizer and 20%-30% of water, and the stabilizer is a water-soluble high-molecular polymer; the solution B is a water glass solution, and the volume ratio of the solution A to the solution B is (10-15): 1; the double-slurry synchronous grouting material further comprises a retarder and a coagulant, the retarder is citric acid, and the coagulant is a nano Ca (OH) 2 crystal nucleus. Bidirectional and gradient regulation and control of the gelation time between 5s and 100s can be realized through the coagulant and the retarder, and diversified requirements of different geological conditions and construction progress on slurry operation time are met.

The invention belongs to the technical field of metal composite materials and hydrogen storage and transportation materials, and particularly relates to a high-strength hydrogen-embrittlement-resistant layered metal composite material for hydrogen storage and a preparation method and application of the high-strength hydrogen-embrittlement-resistant layered metal composite material. According to the preparation method, the nickel-saving austenitic stainless steel (NEASS) and the 30CrMo steel are alternately overlapped in a multi-layer mode, and the processes of vacuum electron beam welding, high-temperature hot rolling, accumulative ply rolling, multi-stage heat treatment and the like are combined, so that the composite board with the layer number reaching hundreds of layers, firm interface bonding, excellent mechanical performance and good hydrogen embrittlement resistance is prepared; the technical problem that strength, toughness and hydrogen brittleness resistance of an existing metal material in a high-pressure hydrogen environment are difficult to consider at the same time is solved. The obtained composite material has high strength, high plasticity and excellent hydrogen embrittlement resistance, and is suitable for structural materials of high-pressure hydrogen storage tanks, hydrogen conveying pipelines and other key hydrogen energy equipment.

This invention discloses a visible-light-responsive dynamically covalently cross-linked self-healing polyurethane and its preparation method, belonging to the field of self-healing materials technology. The material is prepared by reacting diisocyanate, long-chain diol, butanediol, trimethylolpropane, and a monool containing an azophenylboronic acid structure in a certain proportion at 60°C. This invention achieves visible-light-responsive self-healing of the polyurethane material by introducing a visible-light-responsive azophenylboronic acid structure into the polyurethane and utilizing the photoresponsive cis-trans isomerization of the azo structure to regulate the reversible breakage and recombination of the boron-oxygen hexacyclic ring. The visible-light-responsive dynamically covalently cross-linked self-healing polyurethane material prepared by this invention maintains high mechanical strength (16.47 MPa) while exhibiting a strength self-healing efficiency of 95.8% after 8 hours of visible light irradiation, showing broad application prospects in smart materials, anti-corrosion coatings, and other fields.

The invention relates to the technical field of concrete materials, and discloses rapidly-reinforced high-performance sprayed concrete for an existing tunnel lining and a preparation method of the rapidly-reinforced high-performance sprayed concrete. The sprayed concrete is prepared from the following raw materials in parts by weight: 300 to 350 parts of low-calcium high belite sulphoaluminate cement, 80 to 100 parts of superfine slag powder, 3 to 8 parts of a trigger type activating agent, 5 to 15 parts of slow-release particles, 2 to 5 parts of nanogel, 800 to 900 parts of fine aggregate, 800 to 900 parts of coarse aggregate, 30 to 50 parts of copper-plated steel fiber, 0.8 to 1.2 parts of polypropylene fiber, 30 to 40 parts of a viscosity-adjusting accelerator, 10 to 20 parts of a water reducing agent and 160 to 180 parts of water. The sprayed concrete is high in compressive strength and good in durability, the double threats of chemical corrosion and chloride ion permeation / steel bar corrosion are cooperatively solved, and the requirement for rapid reinforcement of tunnels and underground engineering is met.

The invention discloses a compostable and reslurrable mineral-based dual-scale barrier coating as well as preparation and application thereof, and belongs to the technical field of water-based and reslurrable barrier materials. In order to overcome the defects of high coating weight, large color difference or difficulty in recovery in the prior art, a compact barrier is constructed through double-scale collaborative design of interlayer intercalation of layered double hydroxides and interparticle metal micro-networks. The method has the prominent advantage that high-efficiency water-oxygen barrier better than that of a conventional scheme can be realized only by using an extremely low coating amount. Meanwhile, the coating strictly controls color difference to maintain high whiteness of the paper, has pH responsiveness, can be quickly unlapped and dispersed under an acidic condition, and is easy to re-pulp. The coating does not contain PFAS and PVDC, and unification of high barrier, high whiteness and recoverability is achieved.

The invention relates to the technical field of ceramic materials, and discloses antibacterial self-cleaning domestic ceramic and a preparation method thereof. The preparation method comprises the following steps: S1, mixing a ceramic green body raw material, an antibacterial precursor and an auxiliary agent, performing ball milling to obtain slurry, performing slip casting on the slurry to obtain a green body, and drying to obtain the green body; s2, carrying out gradient in-situ reaction sintering on the green body, and sintering at the temperature of 400-600 DEG C; then sintering at the temperature of 800 to 1000 DEG C; then sintering at the temperature of 1100 to 1250 DEG C; s3, after sintering, micron-sized pits are formed in the surface of the ceramic body through plasma etching; and S4, glazing: sintering at 700-900 DEG C to combine the glaze with the biscuit, thereby obtaining the antibacterial self-cleaning domestic ceramic. The preparation process is simple, long-acting synergism of antibacterial and self-cleaning performance is achieved, and firm combination of the functional layer and the ceramic matrix is achieved.

The invention relates to the technical field of ceramic materials, in particular to a method for reducing the surface roughness of a silicon nitride instant-fired sheet, which comprises the following steps: S1, mixing alpha-silicon nitride, beta-silicon nitride, absolute ethyl alcohol and herring fish oil, grinding and dispersing to obtain basic mixed powder; s2, mixing, grinding and dispersing the filling mixed powder, absolute ethyl alcohol and herring fish oil, then carrying out filter pressing and drying, calcining and regrinding to obtain ground filling mixed powder; s3, mixing and ball-milling the basic mixed powder, the ground filling mixed powder, a solvent, an adhesive, a plasticizer and a dispersing agent to obtain slurry; s4, casting the slurry into a film; s5, attaching the thin film to the surface of the silicon nitride green body, and pressing the silicon nitride green body into a whole piece through an isostatic press to obtain a pressed green body; s6, a boron nitride isolation layer is printed on the surface of the pressed green body, and the green body with the isolation layer is obtained; and S7, stacking the green bodies with the isolating layers, and then carrying out adhesive removal and sintering reaction to obtain the silicon nitride ceramic chip.

The invention provides a high-dielectric low-loss X7P type dielectric ceramic material and a preparation method and application thereof, and relates to the technical field of functional ceramic materials, the dielectric ceramic material is composed of a perovskite type compound as a main component and an auxiliary component; wherein the perovskite type compound contains a Ba element and a Ti element, and the auxiliary components comprise a first auxiliary component containing an Mg element, a second auxiliary component containing SiO2, a third auxiliary component containing an Mn element and a fourth auxiliary component containing a rare earth element R. According to the invention, barium titanate is doped and modified, so that the excellent performance of combining different compounds is realized, the dielectric constant and temperature stability of the dielectric ceramic material are improved, and the dielectric loss is reduced.

The invention discloses a high-content fly ash unfired water permeable brick and a preparation method thereof, and relates to the technical field of building materials, the unfired water permeable brick comprises the following raw materials by weight: 55-75 parts of fly ash, 20-35 parts of aggregate, 8-15 parts of a composite cementing material, 0.5-2 parts of toughening fiber, 1-3 parts of a pore regulator, 0.1-0.5 part of a surfactant, and 10-18 parts of water. Wherein the aggregate is 1-3mm waste ceramic particles and 2-5mm building recycled aggregate (1: 1-1: 2); and the rest components have specific proportions, specifications and modification requirements. According to the invention, 55-75 parts of F-type II-grade or higher high-content fly ash is matched with the waste ceramic particles and the pretreated building recycled aggregate to serve as the composite aggregate, solid waste is digested, natural resource dependence is reduced, and the method conforms to the direction of green building materials; by means of a modified composite fiber and composite gel system, the pressure resistance is larger than or equal to 25 MPa, the fracture resistance is larger than or equal to 3.5 MPa, the water permeability is larger than or equal to 1.5 * 10 cm / s, the freeze-thaw loss is smaller than or equal to 3.5%, and the grinding pit is smaller than or equal to 30 mm; through graded mixing, bidirectional pressurization and segmented maintenance, the porosity is kept to be 15%-25%, the percent of pass is increased, and the cost is reduced.

The invention relates to the technical field of functional ceramic materials, and discloses complex-phase gradient isomeric zinc spinel-based composite activated zinc oxide, a preparation method thereof and a ceramic glaze, and the preparation method comprises the following steps: mixing zinc oxide, aluminum oxide, silicon oxide, magnesium oxide and rare earth oxide in proportion to obtain a mixture, adding the mixture and an alkoxy compound into a solvent, and dispersing to form nano precursor slurry; carrying out reduction-oxidation calcination treatment on the obtained nano precursor slurry to obtain a calcined product; and carrying out hydration treatment on the obtained calcined product to obtain the complex-phase gradient isomeric zinc spinel-based composite activated zinc oxide. By implementing the preparation method, the obtained complex-phase gradient isomeric zinc spinel-based composite activated zinc oxide contains a zinc oxide phase and a spinel phase, is low in high-temperature lattice distortion rate and has super wear resistance, and a rare earth element R is introduced, so that the catalytic activity of the zinc oxide is improved, the degradation rate of the zinc oxide to formaldehyde and toluene is increased, and the antibacterial property of the zinc oxide is also improved.

The invention discloses a hydrogen embrittlement-resistant welding wire for tailor welding of ultrahigh-strength aluminum-silicon coating hot-formed steel and a welding method, and belongs to the technical field of metal materials. 5.0%-7.0% of Ni; 0.3%-0.6% of Mo; 0.08% to 0.12% of Nb; mo, Nb and C react to form Mo2C / NbC nanophase fixed free hydrogen; 0.05%-0.1% of V: carrying out a reaction to form VC nanophase fixed free hydrogen; 0.5% to 0.8% of La; 0.3%-0.5% of Ce; 0.1%-0.5% of Ti; according to the invention, hydrogen atoms diffused in the welding process can be captured, the hydrogen content in a welding seam is obviously reduced, and the diffusible hydrogen amount is reduced by more than 40% under the hydrogen capturing effect of retained austenite, so that the hydrogen-induced crack sensitivity is reduced by 70%.

The invention discloses a high-resilience eTPU foaming material and a preparation process thereof, and belongs to the technical field of foaming materials. The process comprises the steps of raw material premixing and TPU chain extension reaction, precursor system injection, in-situ phase change energy storage core-shell particle generation, supercritical two-fluid foaming and molding post-treatment. Wherein the SiO2-coated TiO2 core-shell particles are prepared by a non-hydrolytic sol-gel method, the porous SiO2 core adsorbs and fixes the micro-crosslinked polyurethane-based phase change material, the TiO2 shell provides sealing and supporting, the particles are combined with the TPU matrix through covalent bonds, and the micro-crosslinked polyurethane-based phase change material has a unique micro-crosslinked network structure, so that the thermal conductivity of the TPU matrix is improved, and the thermal conductivity of the TPU matrix is improved. The hidden danger of leakage of the phase change material in the using process can be effectively eliminated, and meanwhile the interface bonding effect between the inorganic particles and the TPU matrix is synchronously enhanced. The eTPU foaming material prepared by the invention has the characteristics of high resilience, strong interface bonding, excellent energy storage stability and low compression set, and is suitable for shoe materials, automotive interiors and other scenes.

The invention discloses a super-early-strength shrinkage-free high-crack-resistance tunnel spraying repair material in the technical field of civil engineering materials, which comprises the following raw materials in percentage by mass: 35-45% of sulphoaluminate cement; 8%-12% of a superfine early strength admixture; 2%-3% of a calcium sulphoaluminate expanding agent; 1%-2% of a magnesium oxide-based expanding agent; 1-2% of a calcium-magnesium composite expanding agent; 10%-15% of hollow glass beads; 1.5%-2.5% of copper plated steel fiber; 0.1%-0.3% of polypropylene fiber; 25%-30% of graded quartz sand; 0.5%-1.0% of a polycarboxylic acid water reducing agent; 3%-5% of an alkali-free liquid accelerator; 0.3%-0.8% of a thixotropic agent; and 0.1%-0.3% of a thickening time control agent. According to the method, a multi-scale performance cooperative regulation system is innovatively constructed. Through accurate control of the hydration process of a gel system, a shrinkage stress multi-stage compensation mechanism and systematic integration of a fiber-matrix interface strengthening technology, the mutual restriction relationship among early strength development, volume stability and crack resistance of a traditional material is broken through.

This invention provides an environmentally friendly expandable polystyrene bead and its preparation process, belonging to the field of foaming material technology. The preparation process includes the following steps: S1, injecting 65.28g of deionized water into a reaction vessel, stirring, adding 0.13g of dispersant and 0.16g of composite stabilizer, dispersing for 20min, then adding 31.95g of styrene monomer and 0.3g of composite initiator, followed by the addition of pentane and SiO2 micelle composite to obtain a base solution; wherein the mass ratio of pentane to SiO2 micelle composite is 1:(0.2-0.3); the mass of pentane is 3.1%-3.2% of the mass of the base solution; S2, subjecting the base solution to stepwise heating at 86℃-140℃ with stirring, then stopping heating, continuing stirring, and allowing it to cool naturally to 40℃, then stopping stirring, with a total reaction time of 8.5-9.5h to obtain the reaction product; S3, discharging the material, washing the reaction product with warm water, filtering, and obtaining the environmentally friendly expandable polystyrene beads. This invention improves the average particle size of expandable polystyrene beads while reducing fine powder.

This invention provides a multifunctional gradient composite filament for 3D printing, its preparation method, and its applications, relating to the field of additive manufacturing materials technology. The filament's cross-section includes at least two structurally or functionally distinguishable regions, each region composed of a thermoplastic polymer with different chemical properties, or a thermoplastic polymer matrix with the same chemical properties but different functional modifications. These at least two regions are arranged in an ordered spatial pattern on the filament's cross-section using a multi-component co-extrusion technique, enabling pre-design and integration of properties. This invention overcomes the inherent limitations of traditional single-material filaments, achieving multifunctionality and performance designability of a single filament. It significantly improves the interlayer bonding performance of multi-component 3D printing and the comprehensive mechanical properties of the printed composite material. Furthermore, it allows for the production of components with both functional gradients and high mechanical properties in a single printhead operation, making it suitable for mass production.

The invention discloses a preparation method of a high-capacity magnesium-based composite material based on MOF structure modification, and belongs to the technical field of hydrogen storage materials, the preparation method comprises the following steps: (1) preparing an M-MOF guest material; (2) modifying an aperture structure of the M-MOF guest material; and (3) preparing the MgH2 (at) S-M-MOF compound by a wet impregnation nano confinement method. Compared with a pure MgH2 hydrogen storage material, the MgH2 (at) S-M-MOF compound magnesium-based hydrogen storage material prepared by the nano confinement method has the advantages that the hydrogen absorption and desorption reaction temperature is obviously reduced, and the dynamics is greatly improved; compared with a traditional nano confinement hydrogen storage material preparation process, the preparation method has the advantages that the comprehensive hydrogen storage performance of a compound is enhanced by modifying a pore structure and introducing catalytic elements, the operability is high, the effective loading rate is high, the preparation period is short, and the yield is high; the required raw materials are cheap and easy to obtain, and the preparation process is low in cost, high in safety and suitable for industrial production and popularization.

The invention relates to the technical field of special functional coating materials for lost foam casting, and particularly discloses a special coating for a large machine tool casting lost foam as well as application and a use method of the special coating. According to the invention, the full-temperature-range functional composite material and the composite aggregate are used for synergistic reinforcement, and mullite is used for high-temperature reinforcement; the temperature-sensitive polymer modified graphite can realize intelligent temperature response of graphite performance; spodumene is used as a thermal expansion adaptive fluxing agent, so that medium-temperature healing and thermal expansion adjustment of a coating system are facilitated; the composite reinforced fibers are reinforced and toughened aiming at large thermal stress of thick and large parts; as an ultralow-temperature glazing agent, the boron-containing glazing agent can form an initial liquid phase at about 450 DEG C to seal the surface of the coating and purify a ventilation channel; the rare earth oxide serving as a high-temperature phase stabilizer can be dissolved in mullite crystal lattices, so that the high-temperature phase stability is improved, and ceramic nodes are refined. Through raw material design, on the premise of ensuring moderate air permeability, the ultrahigh strength and crack resistance of a coating system at extremely high temperature are improved.

The invention discloses a high-toughness corrosion-resistant semi-solid injection molding magnesium alloy and a preparation method thereof, and belongs to the technical field of metal materials. The magnesium alloy comprises the following chemical components in percentage by weight: 8.6 to 11 percent of aluminum, 0.5 to 1 percent of zinc, 0.05 to 0.4 percent of manganese, 0.05 to 0.2 percent of calcium, 0.6 to 2 percent of rare earth element RE and the balance of magnesium and inevitable impurities. The preparation method of the alloy comprises the following steps: (1) adding raw materials according to the component proportion, smelting into magnesium alloy melt, pouring into a mold, and molding to obtain a magnesium alloy ingot; (2) cutting the cast ingot into magnesium alloy semi-solid blank particles; (3) performing injection molding to obtain a molded part; (4) solid solution heat treatment; and (5) performing two-stage aging heat treatment. The magnesium alloy has high toughness and corrosion resistance, and is suitable for semi-solid injection molding. The forming process can achieve near-net forming of complex components, and castings are few in defect, compact in structure and wide in application prospect.

The invention belongs to the technical field of metallurgical materials, and discloses austenite-martensite dual-phase steel and a preparation method and application thereof.The austenite-martensite dual-phase steel comprises, by mass, 0.1%-0.3% of C, 10%-20% of Cr, 6%-10% of Ni, 0.5%-1.5% of Al, smaller than or equal to 0.005% of P, smaller than or equal to 0.005% of S and the balance Fe. A basic strength platform is provided through dislocation strengthening, a nano precipitated phase regulates and controls phase transformation kinetics through chemical partition and enhances dislocation storage capacity, the gradual TRIP effect maintains plastic deformation capacity through phase transformation plasticity and secondary hardening, and finally the requirements for the strength and plasticity of the austenite-martensite dual-phase steel are met at the same time. And when the yield strength at the liquid nitrogen temperature exceeds 2 GPa, the plasticity exceeds 20%.

The invention provides a high-dielectric low-loss ceramic composition as well as a preparation method and application thereof, and relates to the technical field of functional ceramic materials, the high-dielectric low-loss ceramic composition comprises a perovskite type compound serving as a main component and an auxiliary component; wherein the perovskite type compound contains a Ba element and a Ti element, and the auxiliary components comprise a first auxiliary component containing an Mg element, a second auxiliary component containing an Nb element, a third auxiliary component containing an Mn element, a fourth auxiliary component containing a rare earth element R, and a fifth auxiliary component containing SiO2. According to the present invention, the ratio of the main components to the auxiliary components is subjected to design optimization, the ratio of the Nb element in the second auxiliary component to the Mn element in the third auxiliary component is adjusted, and the material preparation process parameters are subjected to optimization control, such that the dielectric constant and the temperature stability of the dielectric ceramic material are improved, and the dielectric loss is reduced.

The invention discloses an anti-oxidation packaging material for hot rolling of thermoelectric materials and a preparation method of the anti-oxidation packaging material, and relates to the technical field of new materials. The packaging material is of a three-layer composite tubular structure and sequentially comprises, from inside to outside, an anti-oxidation barrier layer which is a composite material with an Fe-Al intermetallic compound as a matrix and Y2O3 particles dispersed and distributed; the transition layer is a Ni-Cr-Fe-Mn-C series solid solution alloy with Ni as a matrix; and the structure supporting layer is made of microalloyed low-carbon bainite steel. The layers are metallurgically bonded through hot isostatic pressing, and then the hollow composite pipe is manufactured through cold drawing. The packaging material has excellent high-temperature oxidation resistance, good plastic deformation capacity and structural strength, can effectively isolate oxygen, coordinate strain and maintain overall integrity in the high-temperature hot rolling process, is suitable for protection and densification of Bi2Te3-based, PbTe-based and SiGe-based thermoelectric materials and the like, and remarkably improves thermoelectric performance and production consistency of the thermoelectric materials.

The invention discloses an Mg + Nb co-doped TiO2 giant dielectric ceramic material and a preparation method thereof, and relates to the technical field of giant dielectric materials. The (Mg + Nb) co-doped TiO2 ceramic is successfully prepared by adopting a traditional solid phase method, the performance of the TiO2-based giant dielectric ceramic is regulated and controlled through a new doping strategy, the raw material is single, the preparation process is simple, the cost is low, the repeatability is good, the yield is high, the obtained ceramic material has giant dielectric performance, and the preparation method is suitable for industrial production. The (Mg + Nb) co-doped TiO2 novel giant dielectric ceramic can meet the requirements of a dielectric material with high dielectric constant, low dielectric loss and good temperature and frequency stability, and compared with other widely applied giant dielectric materials, the titanium dioxide-based giant dielectric ceramic has the characteristics of simplicity in preparation and excellent dielectric property.

The invention discloses a synergistic phase change reinforced dental zirconia material and a preparation method and application thereof, and relates to the technical field of ceramic materials.The preparation method comprises the following steps that a zirconium oxychloride solution and a polyvinyl alcohol solution are mixed, dried and then subjected to heat treatment, and ZrC ceramic powder is obtained; then mixing with yttria-stabilized zirconia (Y-PSZ) to obtain composite powder; the composite powder is subjected to hot pressing sintering and cooling, and a pre-sintered body is obtained; introducing Ar-O2 mixed gas, and carrying out controllable oxidation to obtain an oxidation phase change reinforced pre-sintered body; and carrying out high-temperature sintering to obtain the synergistic phase change reinforced dental zirconia material. The invention further discloses the synergistic phase change reinforced dental zirconia material and application of the synergistic phase change reinforced dental zirconia material in preparation of dental products. According to the method, ZrC is introduced, and a pressure stress field formed by crystal transformation in ZrC oxidation and high-temperature sintering processes is utilized, so that the yttrium oxide stabilized zirconia dental ceramic is strengthened, and the mechanical strength of the yttrium oxide stabilized zirconia dental ceramic is remarkably improved.

The invention relates to the technical field of ceramic materials, in particular to a preparation method of a diatomite-based porous ceramic material and application of the diatomite-based porous ceramic material in wastewater pollutant treatment. The preparation method of the diatomite-based porous ceramic material comprises the following steps: mixing a basic raw material, a sintering aid, a pore forming agent and a binder, performing compression molding to obtain a green body, and sintering the green body, the basic raw materials comprise 80-85% of diatomite, 5-10% of kaolin, 0-5% of feldspar and 5-10% of sodium silicate; the mass of the sintering aid is 5% higher than that of the basic raw material; the mass of the pore-forming agent is 25-45% of that of the basic raw material, and the pore-forming agent is selected from one or more than two of crystalline flake graphite, polymethyl methacrylate and spherical graphite. By controlling the composition and dosage of the basic raw materials, the sintering aid and the pore-forming agent, a micro-nano hierarchical pore structure is formed, mechanical properties and permeability are improved at the same time, and good filtration and interception performance on pollutants in wastewater is achieved.

The invention relates to the technical field of TPU materials, in particular to a high-wear-resistance anti-oxidation electroplated TPU film and a preparation method thereof.The high-wear-resistance anti-oxidation electroplated TPU film comprises an elastic UV protection layer, a high-wear-resistance anti-oxidation layer, an electroplated layer and a release paper layer which are sequentially arranged from top to bottom; the high-wear-resistant anti-oxidation layer is made of a high-wear-resistant anti-oxidation TPU (Thermoplastic Polyurethane) material, the electroplated layer is made of an aluminum electroplated film layer, and the release paper layer is made of a PET (Polyethylene Terephthalate) release film layer. The high-wear-resistance anti-oxidation electroplating TPU film has the advantages of wear resistance, oxidation resistance, difficulty in delamination, no conductivity and no sparking, is environment-friendly and energy-saving in the preparation process, and can be used for replacing an electroplating film of a traditional electroplating processing technology.

The invention discloses self-repairing and rapid-repairing cement-based mortar and a preparation method thereof, and belongs to the technical field of building materials. The self-repairing and rapid-repairing cement-based mortar is prepared from the following raw materials: 5500-6500 parts of a composite cementing material; 200 to 650 parts of an inorganic permeable crystalline material; 1500 to 3500 parts of a filling material; 307 to 510 parts of a rapid hardening component; 2-5 parts of a moisturizing and thickening component; 150 to 250 parts of a toughening and softening component; and 6-10 parts of a water reducing agent. The preparation method of the self-repairing and rapid-repairing cement-based mortar comprises the following steps: preparing the raw materials according to the proportion, uniformly mixing, adding the mixing water, and uniformly mixing to obtain the self-repairing and rapid-repairing cement-based mortar. The self-repairing quick-repairing cement-based mortar is efficient in water resistance and leaking stoppage, quick in setting and hardening and high in hour strength and has the function of silt; and a good self-repairing capability is achieved for microcosmic cracks of 0.1 mm.

The invention discloses a high-temperature-resistant organic silicon elastomer with high mechanical property as well as preparation and application thereof, and belongs to the technical field of functional materials. The high-temperature-resistant organic silicon elastomer with high mechanical property is prepared from the following raw materials: hydroxyl silicone oil, white carbon black nanoparticles, a silane monomer cross-linking agent, a silane coupling agent and stannous octoate, and the catalyst also comprises cage-shaped titanium oxygen cluster molecules. According to the invention, by simultaneously using the components, the composite high-temperature-resistant organic silicon elastomer material can be provided, the thermal collapse temperature of the material is almost 500 DEG C, and the composite high-temperature-resistant organic silicon elastomer material is good in thermal stability and mechanical tensile strength and wide in application prospect.

The invention belongs to the technical field of ceramic materials, and particularly discloses whisker toughened zirconium oxide-aluminum oxide composite ceramic and an additive manufacturing method thereof, the composite ceramic comprises the following components by mass: 94 parts of zirconium oxide toughened aluminum oxide ceramic and 5 parts of silicon carbide whisker; the zirconium oxide toughened aluminum oxide ceramic is prepared from the following components in parts by mass: 76 parts of aluminum oxide and 24 parts of zirconium oxide, and 3mol% of yttrium oxide is added into the zirconium oxide. According to the whisker toughened zirconium oxide-aluminum oxide composite ceramic and the additive manufacturing method thereof, the preparation method has unique design of components and process, and the preparation of a high-density and high-performance ceramic-based composite material part based on a fused deposition modeling technology is successfully realized. Further, the prepared silicon carbide whisker toughened zirconium oxide-aluminum oxide-based composite ceramic has relatively high density and excellent obdurability.