43 results about "Nanostructured titanium" patented technology

The invention discloses a preparation method of a nano silicon dioxide modified high-density polyethylene wear-resistant plate, and belongs to the technical field of polyethylene plates, the method comprises the following steps: firstly preparing an antioxidant PMMA microcapsule, then preparing titanium dioxide and silicon dioxide, and modifying by KH550 to obtain modified nano titanium-silicon composite particles; then, an antioxidant coated PMMA microcapsule, the modified nano titanium-silicon composite particles, POE-g-MAH and HDPE particles are premixed, and the wear-resistant plate is obtained through twin-screw extrusion granulation and pulsating force field assisted molding; through the synergistic effect of the antioxidant coated PMMA microcapsule, the modified nano titanium-silicon composite particles and the compatilizer POE-g-MAH, the problems that the wear resistance of the HDPE plate is insufficient and the antioxidant is easily adsorbed by nano silicon dioxide to cause aging resistance attenuation are solved, and the wear resistance, thermal oxidation / light aging resistance and mechanical property improvement of the plate are realized; and the requirements of high-frequency wear scenes such as mine conveying and outdoor engineering can be met.

The present application relates to the technical field of dielectric ceramic powder preparation, and particularly relates to a multilayer ceramic capacitor, a high-activity nano-barium titanate powder for the multilayer ceramic capacitor and a preparation method of the high-activity nano-barium titanate powder, the method comprising the following steps: (1) reacting a soluble barium salt with a precipitator to obtain barium carbonate precursor particles with high specific surface area; (2) uniformly coating nano-titanium dioxide particles on the surface of the barium carbonate precursor particles by using a supercritical fluid flash technology to form a composite precursor; and (3) performing a solid-phase synthesis reaction on the composite precursor and sintering to obtain nano-barium titanate powder. The present application, through the synergistic effect of the two means of "high-activity precursor preparation" and "nano-level uniform coating", prepares a composite precursor with extremely high specific surface area, surface energy and micro-uniformity, effectively reduces the heat sintering temperature, suppresses abnormal grain growth and lattice distortion, and significantly improves the tetragonality of the nano-barium titanate powder.

The application provides a preparation method of a high-efficiency piezoelectric coating on a titanium implant surface. The preparation method of the application uses a hydrothermal treatment and an in-situ piezoelectric deposition technology to in-situ synthesize a nano strontium titanate-noble metal piezoelectric coating on the titanium implant surface. The coating can generate a piezoelectric potential and active oxygen through ultrasonic driving to degrade extracellular polymers and kill bacteria. In addition, the piezoelectric coating can also promote the osteogenic differentiation of bone marrow mesenchymal stem cells under piezoelectric stimulation, and finally realize the effects of bioactivity, long-acting drug-resistant bacteria and high-efficiency bone integration in the body. The application can provide a new surface treatment technology and research idea for controlling the drug-resistant bacteria infection on the implant surface, help to break through the limitations of the existing theory and technology in removing bacterial infection on the titanium implant surface, and provide beneficial guidance for the control of bacterial biofilm on other parts and the prevention and treatment of related infectious diseases.

The invention discloses nanoscale Ti2O3, a preparation method and application of the nanoscale Ti2O3 as a catalyst carrier, and belongs to the technical field of nano material preparation. According to the invention, a solid-phase synthesis method is utilized, nano titanium powder and nano titanium dioxide are used as raw materials, and the nano-scale Ti2O3 brownish black powder with uniform particle size distribution is controllably synthesized. Meanwhile, a series of noble metal supported catalysts are synthesized by taking the catalyst as a catalyst carrier. According to the invention, rapid synthesis of nanoscale Ti2O3 is realized, and the particle size of the prepared sample is uniform and is about 300nm. The preparation method has the characteristics of high efficiency, rapidness, low equipment requirement, simplicity, easiness in repetition, high product purity and capability of realizing large-scale synthesis. Meanwhile, the prepared nanoscale Ti2O3 is small in size and uniform, so that a catalyst prepared by taking the nanoscale Ti2O3 as a carrier has relatively good dispersity, shows excellent electrocatalytic activity, can be prepared into catalyst slurry with relatively high uniformity, and is suitable for the fields of electrochemical catalysis and energy conversion.

The invention discloses a polycarbonate material with high CTI (Comparative Tracking Index). The polycarbonate material comprises the following components in parts by weight: 70-90 parts of polycarbonate, 5-15 parts of nano titanium dioxide, 3-8 parts of metasilicate, 0.3-0.5 part of a coupling agent and 0.5-1 part of a lubricant. The invention further provides a preparation method and application of the high-CTI polycarbonate material. According to the high-CTI polycarbonate material and the preparation method and application thereof provided by the invention, the obtained polycarbonate material has excellent arc resistance and tracking resistance, also has good impact resistance and temperature resistance, and can be widely applied in scenes requiring strict electrical safety performance.

The invention discloses titanium-containing leather, which is prepared from a solvent-free PU (polyurethane) mixture prepared by mixing a component A and a component B through blade coating, baking, base cloth attaching and separation processes, and the component A comprises the following components in percentage by mass: 80-85% of polyether polyol, 12-15% of polyester polyol, 2-8% of nano titanium powder, 0.2-0.6% of a zinc-bismuth compound and 0.1-0.4% of a platinum-carbon catalyst. By adding nano titanium powder into a solvent-free PU mixture and combining a specific component ratio and a preparation process, the product has good high temperature resistance, super-strong corrosion resistance and antibacterial property and is suitable for various application scenes such as outdoors, home furnishing, fitness equipment and the like, the leather is endowed with excellent mechanical properties due to the super strength of titanium, the leather is suitable for lightweight design, and the cost is reduced. The leather material has the advantages of high temperature resistance, corrosion resistance, biocompatibility and the like, can be widely applied to the fields of new energy automobiles and aerospace, has excellent biocompatibility, and meets the requirements of scenes such as medical and physical therapy equipment, children products, dining table mats and the like on material safety.

The application relates to the alloy preparation technical field, and discloses a nano-titanium reinforced magnesium-based alloy, a preparation method thereof and mechanical equipment. The disclosed preparation method of the nano-titanium reinforced magnesium-based alloy comprises the following steps: uniformly dispersing nano-titanium particles in paraffin to obtain a paraffin preform; heat-treating the paraffin preform to remove part of the paraffin to obtain a dewaxing preform; the mass ratio of the nano-titanium particles to the paraffin in the dewaxing preform is 1:0.3-0.8; adding the dewaxing preform into a semi-solid magnesium alloy melt to uniformly stir and mix, so that the paraffin attached to the surface of the nano-titanium particles completely escapes from the melt to obtain a mixed melt; pouring casting after the temperature of the mixed melt is increased by 50-80 DEG C to obtain the nano-titanium reinforced magnesium-based alloy. The disclosed nano-titanium reinforced magnesium-based alloy is prepared by using the above preparation method. The disclosed mechanical equipment is prepared by using the above magnesium-based alloy. The preparation method provided by the application can uniformly disperse the nano-titanium in the magnesium-based alloy, and obtain a composite magnesium-based alloy material with good mechanical properties.

The invention relates to the technical field of metal powder for additive manufacturing, and discloses high-temperature alloy powder for additive manufacturing and a preparation method of the high-temperature alloy powder for additive manufacturing. The powder is formed by physically blending nickel-based parent powder and reactive functional powder with a core encapsulation layer structure; the inner core of the reactive functional powder comprises nano aluminum powder, nano titanium powder and a surface tension modifier precursor, and the outer layer of the reactive functional powder is an inorganic matter encapsulation layer. By means of the design, in the laser melting process, the packaging layer plays a role in physical isolation and thermal buffering on high-activity elements in the inner core, and volatilization and burning loss of the high-activity elements are effectively restrained; and meanwhile, controlled release and in-situ reaction of active elements in the molten pool are achieved, a dispersion strengthening phase is promoted to be formed so as to inhibit solidification cracking, and flowing of the molten pool is optimized so as to improve the density of the component. According to the method, the technical problems that in high-strength high-temperature alloy additive manufacturing, cracking is prone to occurring, element burning loss is serious, and the number of metallurgical defects is large are solved, and a high-performance component which is accurate in component, compact in structure and free of macroscopic cracks can be obtained.

The present application relates to the technical field of dielectric ceramic powder preparation, and particularly relates to a multilayer ceramic capacitor and a method for preparing high-performance nano-barium titanate powder used for the multilayer ceramic capacitor, the method comprising the following steps: high-purity titanium hydroxide precursor and solid-state barium source are mixed under the condition of deep cold medium at low temperature, so as to form an amorphous composite precursor with high reactivity, and finally, the nano-barium titanate powder is generated through a hydrothermal synthesis reaction. The present application realizes the forced mixing of the titanium hydroxide precursor and the solid-state barium source at the solid state through the low-temperature cryogenic grinding, so as to physically ensure that the Ba / Ti ratio is highly consistent in each micro area, and the problem of the out-of-control stoichiometric ratio is solved from the source. Meanwhile, the high activation of the precursor shortens the hydrothermal reaction time, greatly reduces the calcination temperature, effectively inhibits the abnormal growth of the crystal grains, and makes the product particle size distribution narrower and the performance better.

The present invention relates to the technical field of a dielectric ceramic powder manufacturing process, and particularly relates to tetragonal nanometer barium titanate powder, a manufacturing method thereof, and an application. The manufacturing method includes: (S.1) manufacturing a mesoporous titanium dioxide precursor with controllable crystal phase, adding it to a barium salt solution so that the molar ratio of barium to titanium is 2 to 4, then adding ethanol and aqueous ammonia to obtain a barium titanate precursor suspension in which the volume ratio of ethanol is 40% to 60%; (S.2) subjecting the barium titanate precursor suspension to a hydrothermal reaction to obtain a barium titanate suspension; and (S.3) centrifugally washing, drying, and pulverizing the barium titanate suspension to obtain tetragonal nanometer barium titanate powder. In the present application, by simultaneously controlling the molar ratio of barium to titanium between the anatase-type mesoporous titanium dioxide precursor and the barium salt in the hydrothermal reaction process and the ratio of ethanol in the hydrothermal medium in the hydrothermal reaction process, barium titanate powder having a higher c / a value and particle size uniformity can be obtained.

The invention discloses a preparation method of an equiaxial nanoscale titanium alloy bar, and relates to the technical field of beta-type titanium alloy processing. The preparation method specifically comprises the following steps that a TB8 alloy raw material is weighed in proportion, a Y raw material is added into the weighed TB8 alloy raw material, and a mixed alloy raw material is formed; the mixed alloy raw materials are placed in a smelting device, protective gas is introduced, heating smelting is carried out, smelted alloy raw material liquid is poured into a mold, then the mold is subjected to water cooling, and a cast ingot is obtained through rapid solidification; carrying out homogenizing annealing treatment on the cast ingot, and then carrying out air cooling to obtain an alloy bar; and the alloy bar is subjected to room-temperature graded rotary swaging, and the equiaxial nanoscale titanium alloy bar is obtained. According to the preparation method, Y is added in the TB8 alloy smelting process, homogenization treatment is conducted, room-temperature graded rotary swaging is conducted, the equiaxial nanoscale titanium alloy material is successfully prepared through the synergistic effect, and the prepared alloy material is stable in structure and not prone to cracking and has the ultrahigh strength, superplasticity and anti-fatigue characteristics.

This application discloses a nano-tetragonal barium titanate and its process-enhanced continuous preparation method, belonging to the field of barium titanate preparation technology. The process-enhanced continuous preparation method for nano-tetragonal barium titanate includes the following steps: preparing a circulating mother liquor, a titanium tetrachloride acid hydrolysate, a barium chloride solution, and an ammonia solution; adding the titanium tetrachloride acid hydrolysate dropwise to the barium chloride solution to obtain a titanium-barium mixture; passing the titanium-barium mixture, the circulating mother liquor, and the ammonia solution into a microdroplet process-enhanced device for mixing and reaction; after heat preservation and aging, and solid-liquid separation, obtaining a mixed precipitate and a first filtrate; dissolving the mixed precipitate in a solvent, filtering to obtain barium oxalate tetrahydrate and a second filtrate; calcining the barium oxalate tetrahydrate to obtain nano-sized tetragonal barium titanate powder. By employing a microdroplet process-enhanced method, the titanium-barium mixture and the ammonia solution are dispersed into microdroplets smaller than 10 μm, enhancing the degree of material mixing, improving the mass transfer rate, and obtaining nano-barium titanate with small particle size and high purity.

The invention belongs to the field of ceramic materials, and particularly relates to a lead-free ferroelectric ceramic material and a preparation method thereof.The preparation method comprises the steps that aluminum nitrate nonahydrate and titanium isopropylate are dissolved in ethylene glycol and stirred, a citric acid solution is added, stirring continues, and a precursor solution A is prepared; dissolving bismuth nitrate pentahydrate in a citric acid solution, and stirring to prepare a precursor solution B; mixing the precursor solution A and the precursor solution B, stirring and drying to form gel; drying, grinding and crushing the gel, and calcining to obtain ceramic powder; the preparation method comprises the following steps: uniformly mixing ceramic powder and nano barium titanate powder by taking deionized water as a medium, and drying to obtain precursor powder; grinding and granulating the precursor powder and a 5wt% polyvinyl alcohol solution in an agate mortar, and then applying axial pressure to form a green body; and putting the green body into a corundum crucible with a cover, and sintering by using a two-step method to finally obtain the lead-free ferroelectric ceramic material. According to the invention, a universal combined optimization strategy is provided, and a strong relaxation ferroelectric system is developed.

The invention discloses tetragonal-phase barium titanate powder as well as a preparation method and application thereof, and relates to the technical field of inorganic functional materials. Comprising the following steps: sulfonating a template agent to prepare a modified template agent; mixing a barium source, a titanium source and the modified template agent in proportion to prepare a precursor; and calcining the precursor in an inert negative pressure environment to prepare the tetragonal barium carbonate powder. Wherein the sulfonation treatment template agent is beneficial to enhancing the stability and uniformity of ion adsorption and eliminating abnormal growth of crystal grains caused by non-uniform ion adsorption; calcining in an inert negative-pressure gas atmosphere, so that Ba and Ti atoms can be orderly arranged at low temperature, and the purpose of synthesizing tetragonal-phase barium titanate at low temperature is achieved. Namely, according to the preparation method disclosed by the invention, the uniform and nanoscale tetragonal-phase barium titanate powder can be efficiently prepared in a low-temperature state, the prepared tetragonal-phase barium titanate powder is good in dispersity, uniform in particle size and controllable in size, and the application field of nano barium titanate is greatly widened.

The invention relates to the technical field of adhesive tapes, and particularly discloses a shading adhesive tape for a folding screen metal support and a preparation method and application of the shading adhesive tape. The shading adhesive tape for the folding screen metal support sequentially comprises a black ink layer, a primer layer, a base material layer, an adhesive layer and a protective layer from outside to inside, the black ink layer is prepared from the following raw materials: waterborne polyurethane, an opacifying agent, a nonionic polycarboxylate dispersing agent, a blocked isocyanate cross-linking agent, a polyurethane elastomer toughening agent, polyethylene glycol, an antioxidant 1010 and a solvent; the opacifying agent is obtained by activating and modifying carbon black, grafting polyethylene glycol, performing micro-fluidic chip dual-channel treatment on the carbon black and nano titanium dioxide with positive charges, and coating polyurethane-acrylate. The shading adhesive tape prepared by the invention has a good shading effect when being used for the metal bracket of the folding screen.

The invention relates to the technical field of protective coatings, and discloses a self-cleaning anti-corrosion weather-resistant finish paint as well as a preparation method and application thereof. The finishing paint comprises a component A and a component B (an isocyanate curing agent), the component A comprises nano composite modified white color paste, fluorocarbon resin, matting powder, a solvent, an adhesion promoter, a light stabilizer and an ultraviolet absorbent in specific parts by weight; the nano composite modified white color paste comprises acrylic resin, nano titanium dioxide, nano aluminum oxide, nano inert hydrophobic gas silicon, super-hydrophobic aerogel, a modifier, a dispersant and an auxiliary agent in specific parts by weight. The finishing paint is adaptive to various base materials, has high weather resistance, corrosion resistance, damp heat resistance, salt mist resistance, self-cleaning and wear resistance, a cured paint film is compact, the compatibility with epoxy primer / intermediate paint and the like is high, the cost is controllable, and the finishing paint can be directly coated on various base materials, can also be matched with the epoxy primer / intermediate paint and the like for use, is suitable for wind power tower protection in an offshore high-corrosion environment, and has wide application prospects. And the 25-year long-acting service requirement of offshore wind power equipment is met.

The invention relates to a high-strength, high-conductivity and wear-resistant powder metallurgy copper-titanium alloy and a preparation method thereof, and belongs to the field of non-ferrous metal alloy materials. The alloy comprises the following components in percentage by weight: 2.0-4.0% of nano titanium and the balance of copper and inevitable impurities. The preparation method comprises the following steps: carrying out ball milling on copper powder and nano titanium powder to obtain pre-alloyed composite powder; then cold pressing is carried out, hot pressing sintering is carried out in vacuum or protective atmosphere, the sintering temperature is 900-950 DEG C, and the pressure is 30-50 MPa; and finally, the comprehensive performance is further optimized through hot rolling and annealing treatment. According to the method, mechanical alloying, thermal deformation and thermal treatment are combined, solid solution and dispersion strengthening of titanium in a copper matrix are promoted, and the grain boundary and precipitated phase state is regulated and controlled, so that the strength, conductivity and wear resistance of the material are synergistically improved. The obtained alloy is uniform and fine in structure, the tensile strength is not lower than 900 MPa, the electric conductivity is not lower than 28% IACS, the abrasion resistance is excellent, and the alloy is suitable for key parts such as electrical contacts, pantograph slide plates and robot bearings.

The invention relates to the field of fireproof coatings, and relates to a nano-titanium modified solvent-free epoxy fireproof coating and a preparation method thereof, the nano-titanium modified solvent-free epoxy fireproof coating comprises the following components: 100 parts of a component A and 30 parts of a component B, the component A comprises epoxy resin, a nano titanium modified epoxy polymer, liquid polysulfide rubber, a reactive diluent, a catalyst, a charring agent, a flame retardant phosphate, magnesium hydroxide, expansible graphite, ceramic chopped cotton and an auxiliary agent; the component B is prepared from the following components: a modified polyamide curing agent, a foaming agent, aluminum hydroxide, titanium dioxide, kaolin, zinc borate and carbon fiber powder. The prepared fireproof coating fills up the blank of multifunctional coatings for resisting hydrocarbon flame and explosion impact, resisting corrosion, resisting water, being high in weather resistance and the like in domestic outdoor use; the flux-free epoxy intumescent fireproof coating is modified by the nano titanium modified epoxy polymer, so that the flux-free epoxy intumescent fireproof coating has excellent fireproof performance and also has corrosion resistance, water resistance and weather resistance.

This application relates to the field of rare earth permanent magnet materials and discloses a method for preparing a multi-phase sintered NdFeB permanent magnet with a core-shell structure, comprising the following steps: S1 Mixing: Under a protective atmosphere, the main phase matrix powder and the kinetically modified composite powder are mixed uniformly to obtain a mixed powder; S2 Shaping: The mixed powder is oriented and pressed into shape under an orientation magnetic field to obtain a green blank; S3 Sintering: The green blank is placed in a vacuum sintering furnace for sintering, the sintering process including a first stage, a second stage, and a third stage; S4 Heat Treatment: The sintered magnet is subjected to aging treatment. By introducing nano-titanium powder or nano-zirconium powder as a thermal trigger in the kinetically modified composite powder, its hydrogen absorption and exothermic properties provide reaction activation energy at the microscopic interface. Combined with a heavy rare earth-iron ratio close to the eutectic point, the modifier is promoted to generate a heavy rare earth-rich liquid phase in situ at a lower temperature.

The invention discloses a high-strength wear-resistant copper-based composite material and a preparation method thereof. The composite material is composed of a copper matrix, reduced graphene oxide and a nano titanium carbide reinforced phase, wherein the reduced graphene oxide and the nano titanium carbide reinforced phase are uniformly dispersed in the copper matrix. The preparation method comprises the following steps: firstly, uniformly mixing the copper powder, the reduced graphene oxide and the nano titanium powder in a ball milling manner; then putting the mixed powder into a vacuum hot-pressing sintering furnace, and densifying at high temperature and high pressure to obtain a sintered block; and finally, the sintered block is subjected to hot rolling deformation and annealing treatment, and the final copper-based composite material is obtained. The preparation method is characterized in that nano titanium is introduced to serve as an interface modifier and can effectively improve the interface bonding property between copper and graphene, meanwhile, authigenic nano titanium carbide plays a dispersion strengthening role, and the authigenic nano titanium carbide and the strengthening and toughening effect of graphene cooperate to jointly strengthen a copper matrix. And through the process combination of hot pressing sintering and hot rolling annealing, the wear resistance of the material is remarkably improved while the high strength of the material is ensured.

The invention belongs to the technical field of refractory materials, and particularly relates to an unshaped refractory material containing nano-powder and a preparation method of the unshaped refractory material. The amorphous refractory material is prepared from the following components in parts by mass: 60 to 70 parts of aluminum oxide micro powder, 20 to 30 parts of silicon carbide micro powder, 1 to 5 parts of modified nano graphite powder, 5 to 7 parts of silica sol, 3 to 5 parts of aluminate coupling agent, 4 to 7 parts of modified carbon fiber, 2 to 5 parts of chopped mullite fiber, 2 to 3 parts of rare earth compound stabilizer, 1 to 2 parts of nano titanium powder, 3 to 5 parts of nano ZrO2-Y2O3 and 2 to 4 parts of compound antioxidant. The particle size of the alumina micro powder is 5-50 [mu] m, and the particle size of the silicon carbide micro powder is 10-80 [mu] m. The prepared unshaped refractory material has excellent oxidation resistance, erosion resistance and thermal shock resistance stability.

This application relates to the field of adhesive tape technology, specifically disclosing a light-shielding tape for a foldable screen metal bracket, its preparation method, and its application. The light-shielding tape for the foldable screen metal bracket comprises, from the outside to the inside, a black ink layer, a primer layer, a substrate layer, an adhesive layer, and a protective layer. The black ink layer comprises the following raw materials: waterborne polyurethane, a light-shielding agent, a nonionic polycarboxylate dispersant, a blocked isocyanate crosslinking agent, a polyurethane elastomer toughening agent, polyethylene glycol, antioxidant 1010, and a solvent. The light-shielding agent is obtained by activating and modifying carbon black, grafting it with polyethylene glycol, then treating it with positively charged nano-titanium dioxide through a microfluidic chip dual-channel process, and finally coating it with polyurethane-acrylate. The light-shielding tape prepared in this application exhibits excellent light-shielding performance when used for foldable screen metal brackets.

The invention discloses an oversized cylindrical sodium-ion battery structure and a safety cooperation system, and relates to the technical field of sodium-ion battery structures and safety control, the oversized cylindrical sodium-ion battery structure comprises a double-gradient self-adaptive collector plate, spokes are wide in center and narrow in edge, the spacing of the spokes is in a cooperative gradient, and a base material is an aluminum-based composite layer coated with a nano titanium coating; the four-function integrated core rod is internally provided with a flow guide channel and gradient through holes, coated with a temperature-sensitive conductive coating, filled with porous ceramic particles and provided with a pressure relief sheet; according to the positive and negative electrode-diaphragm bidirectional adaptive structure, diaphragm pores are distributed in a gradient manner, composite coatings are arranged on the two sides, and hot sealing glue is coated on the edges; the invention discloses a graded pressure relief-fire extinguishing cooperative safety system. According to the electrolyte-material collaborative optimization system, a high-salt-concentration electrolyte and a multi-component additive are adopted, and infiltration is carried out through a multi-step liquid injection process. Through full-chain innovation, the problems that an existing battery is uneven in current collection, slow in electrolyte infiltration, lagged in safety response and the like are solved; and the process improves the production efficiency, adapts to multiple application scenes, and meets the large-scale mass production requirements.

The present application relates to the technical field of lithium ion battery negative electrode material preparation, and particularly relates to a Mxene material, a preparation method thereof and application of the Mxene material in a lithium ion battery negative electrode material, wherein the present application takes nano titanium powder, nano carbon powder and nano aluminum powder as precursors, reacts in a molten salt bath to generate a MAX phase material, and etches aluminum components in the MAX phase material in the molten salt bath by using CuCl2 to obtain a Mxene two-dimensional material; and the present application prepares a nano-scale layered Mxene material with an accordion-like and porous structure morphology.

The invention discloses alumite paint capable of enhancing the color development effect and a preparation method of the alumite paint, and relates to the technical field of alumite paint. The water-based paint is prepared from the following components in parts by weight: 28 to 35 parts of modified polyacrylate emulsion, 8 to 12 parts of epoxy resin E-44, 12 to 18 parts of composite pigment of nano titanium dioxide and vanadium yellow, 6 to 15 parts of pigment component, 1 to 3 parts of monopotassium phosphate, 1 to 2 parts of silane coupling agent KH-560, 0.8 to 1.2 parts of sodium polycarboxylate dispersing agent and 25 to 32 parts of deionized water. According to the invention, a series of structures are arranged, and the triple dynamic pigment and the natural coloring agent are cooperated, so that a multi-layer developing effect of temperature change, light change, iridescent gradual change and natural ground color fusion is realized.

The invention relates to the field of metal additives, and discloses a high-dispersion silicon additive suitable for low-temperature smelting and application of the high-dispersion silicon additive in aluminum alloy, the additive comprises the following raw materials in parts by mass: 85-92 parts of silicon powder, 2-5 parts of a coating agent, 3-6 parts of a composite fluxing agent and 1-3 parts of a modifier; the surface of the silicon powder is subjected to plasma activation treatment. According to the invention, a raw material formula is optimized, plasma activated silicon powder is taken as a core, and a sodium alginate modified chitosan coating agent, a specific composite fluxing agent and a nano titanate modifier are matched; the technology parameters are optimized, low-temperature smelting at the temperature of 700-750 DEG C is achieved, the silicon dispersity and recovery rate are improved, energy consumption and the impurity content are reduced, the pain point of a traditional technology is solved, and the high-end aluminum-silicon alloy production requirement is met.

The application discloses a method for preparing nano titanium-silicon molecular sieve TS-1, which comprises the following steps: (1) adding a silicon source into a template agent aqueous solution, uniformly mixing, and obtaining a full-silicon mixed solution; (2) performing rotary evaporation and heating on the full-silicon mixed solution to prepare a full-silicon precursor solution; (3) adding a titanium source into an aqueous solution containing a complexing agent, stirring and hydrolyzing to obtain a titanium source hydrolysis solution; (4) adding the titanium source hydrolysis solution into the full-silicon precursor solution prepared in the step (2) to obtain a silicon-titanium mixed solution, sealing a reactor, hydrothermally crystallizing, and obtaining a crystallization product; and through filtering, washing, drying and calcining, the nano titanium-silicon molecular sieve TS-1 is obtained. The method is simple in operation, short in synthesis period, and can effectively avoid the formation of non-framework Ti caused by the mismatching of silicon-titanium species hydrolysis and crystallization rate, and the prepared TS-1 is a microcrystalline aggregate with a size of 100-200 nm.

The invention discloses a friction material for a brake pad and a preparation method and application of the friction material, and belongs to the technical field of friction materials. The nano calcium silicate, the expanded vermiculite and the nano potassium titanate which are different in particle size are compounded, pores of the expanded vermiculite with the large particle size can be filled with the nano calcium silicate and the nano potassium titanate with the small particle size, the nano sound absorbing material with the specific pore structure is formed, the nano sound absorbing material can absorb noise, and the sound absorbing effect is good. Further, the low-noise friction material is obtained; in addition, by adding the friction modifier, the wear resistance of the friction material can be improved; meanwhile, the reinforced fibers and the matrix curing material can absorb or restrain vibration, so that noise is reduced; through the synergistic effect of the components, the noise of the friction material in the braking process is remarkably reduced, and the friction material also has good wear resistance; therefore, the friction material has a better application prospect in the brake disc of the electric vehicle.

The invention relates to the technical field of polymer / nano inorganic matter composite materials, in particular to a graphene nano titanium alloy epoxy polymer and a preparation method thereof.The graphene nano titanium alloy epoxy polymer is prepared from epoxy resin, liquid polysulfide rubber, metal titanium powder, high-purity graphite powder, a silane coupling agent, polyvinylpyrrolidone, organobentonite and a mixed solvent; after freezing treatment of high-purity graphite powder and preparation of a polymer solution, the polymer solution, metal titanium powder and the frozen high-purity graphite powder are put into a planetary ball mill for ball milling, and the graphene / nano titanium alloy epoxy polymer is prepared. The graphene nano titanium alloy epoxy group polymer prepared by the invention is matched with an epoxy curing agent to prepare a special anticorrosive coating, and the special anticorrosive coating has the advantages of temperature resistance, weather resistance, stain resistance, excellent mechanical properties and ultrahigh heavy corrosion resistance. A certain amount of graphene / nano titanium alloy epoxy polymer is added into the conventional epoxy anticorrosive paint, so that the comprehensive performance of the conventional epoxy anticorrosive paint can be remarkably improved.

The application discloses a preparation method of nano barium titanate for electronic ceramics, and comprises the following steps: adding a dispersing agent into an oxalic acid solution, starting a stirring device and heating; adding barium chloride solution and titanium tetrachloride solution into the oxalic acid solution in parallel flow at a uniform speed, and controlling the pH value of the reaction system to be 2.0-4.0; filtering and washing the mixture after reaction, drying and roasting the filter cake, and obtaining nano barium titanate. By introducing the dispersing agent into the reaction system, adding the reactants in parallel flow at a uniform speed, and making the reaction proceed under high-speed stirring, the application reduces the particle agglomeration in the reaction and roasting processes, and can prepare tetragonal phase nano barium titanate with small particles and high dispersion.