271 results about "Potassium titanate" patented technology

The invention provides an aerogel-based heat-preservation, heat-insulation and waterproof composite coating material for a building outer wall and a preparation method thereof, and belongs to the field of building materials. Through hydrophobic modified silicon dioxide aerogel, a lightweight heat insulation frame is provided, and the waterproofness and compatibility are improved; the mechanical property and the crack resistance are enhanced through the modified potassium titanate nanofibers, and self-adaptive heat insulation is achieved; the thermoelectric effect, the wear resistance and the thermal regulation performance are optimized through plasma treatment and polyaniline coated tungsten carbide nanoparticles; the heat management performance, the crack resistance and the comprehensive heat insulation and waterproof capacity are improved through graphene oxide composite modified boron nitride; the flexibility, the hydrophobicity and the interfacial compatibility are improved through organic silicon modified bisphenol A epoxy resin; and the performance of the coating is optimized through the synergistic effect of the components.

The invention discloses a degradable PLA composite material and a preparation method thereof, and belongs to the technical field of polylactic acid materials, the degradable PLA composite material comprises the following raw materials by mass: 80-95 parts of polylactic acid, 5-15 parts of carboxyl-terminated hyperbranched polycaprolactone, 3-5 parts of potassium titanate whisker, 0.1-3 parts of an antioxidant, 1-5 parts of a compatilizer and 1-2 parts of an anti-hydrolysis agent. By compounding carboxyl-terminated hyperbranched polycaprolactone and polylactic acid, a large number of flexible chain segments are introduced into a polylactic acid matrix material, so that the problem of high brittleness of polylactic acid can be well solved; the potassium titanate whiskers are also added into the composite material, and the thermal stability and mechanical properties of the material can be improved due to the excellent strength and stability of the potassium titanate whiskers. And the potassium titanate whisker can be used as a nucleating agent to solve the problem that the crystallization property of the polylactic acid is reduced due to compounding of the carboxyl-terminated hyperbranched polycaprolactone, and the crystallinity of the polylactic acid composite material is improved, so that the heat resistance of the polylactic acid composite material is improved.

A seamless flux-cored wire for 10CrNiCu steel for ships, applied to welding of continuous casting 907A steel for a main hull and composed of a low-carbon steel sheath and a flux core. The diameter of the wire is 1.0-1.4 mm; the filling rate of flux-cored powder is 14%-16%; measured as the mass percentage of the flux-cored wire, the flux core contains rutile, aluminum oxide, ferroboron, zircon sand, quartz, bismuth oxide, potassium titanate, sodium fluoride, electrolytic manganese, ferrotitanium, magnesium powder, manganese-silicon alloy, nickel powder, metal chromium, copper powder, and iron powder. The seamless flux-cored wire for 10CrNiCu steel for ships has the advantages of good welding performance, stable mechanical properties, good crack resistance, low diffusion hydrogen content, high moisture absorption resistance, excellent rust resistance, and the like. Also provided is a method for manufacturing the seamless flux-cored wire for 10CrNiCu steel for ships

The invention provides carbon fiber directionally-distributed high-thermal-conductivity airtight paste and a preparation method thereof, and belongs to the technical field of airtight paste. According to the invention, a high-efficiency heat-conducting network is constructed through the synergistic effect of various heat-conducting fillers, and the heat-conducting property, the mechanical property and the long-term stability of the composite material are remarkably improved; the potassium titanate whiskers are coated by silica sol and modified by a silane coupling agent to improve the interfacial compatibility and dispersity, and are uniformly distributed in a matrix to reduce interface defects; trimethyl hydroxyl phosphate and an epoxy reactive diluent are subjected to a synergistic reaction to prepare a functional auxiliary agent, so that the interface bonding force is enhanced, and the dispersity of the filler is optimized; metal salt and ethylenediamine tetraacetic acid are chelated, and polyethylene glycol 400 is introduced to form a flexible complex, so that the interface stability and the filler dispersion efficiency are improved; and the uniformity and continuity of the thermal conductivity network are optimized through the synergistic effect of the long and short carbon fibers and a directional arrangement strategy. The heat conduction efficiency, the mechanical property and the processing adaptability of the composite material are remarkably improved through the synergistic effect of various fillers and modification means.

The invention discloses a PPS high-strength temperature-resistant composite material, preparation thereof and application of the PPS high-strength temperature-resistant composite material in a humanoid robot. The composite material comprises the following raw material components: 35-55 parts by mass of polyphenylene sulfide, 20-40 parts by mass of a composite reinforcing agent, 2-8 parts by mass of a flexibilizer, 3-9 parts by mass of a conductive agent, 3-7 parts by mass of potassium titanate whiskers, 0.2-0.5 part by mass of a coupling agent and 0.1-1 part by mass of an antioxidant, and the composite reinforcing agent comprises more than two reinforcing agents with different forms and / or sizes. The obtained PPS high-strength temperature-resistant composite material is subjected to multi-scale enhancement and multifunctional modification on the basis of a PPS material, the performance limitation of an existing PPS material can be broken through, and powerful material support is provided for high-performance and intelligent development of humanoid robots.

The invention relates to the technical field of welding materials, and particularly discloses a high-temperature-resistant flux-cored wire containing rare earth elements and a preparation method of the high-temperature-resistant flux-cored wire. The high-temperature-resistant flux-cored wire containing the rare earth elements comprises a welding wire skin and a flux core. The flux core comprises the following raw materials of dehydrated rutile, dehydrated potassium feldspar, zircon sand, metal chromium powder, metal nickel powder, electrolytic manganese, ferrotitanium, ferro-aluminum, potassium cryolite, potassium titanate, sodium titanate, fine iron powder, yttrium-based iron alloy powder, atomized ferrosilicon, nitrided ferrochrome, bismuth oxide, auxiliaries and the balance reduced iron powder. The auxiliary agent is a mixture of a zirconium-iron alloy, a titanium-iron alloy and an aluminum-magnesium alloy. A specific alloy auxiliary is introduced into the flux core to protect stable transition of rare earth yttrium, yttrium and multiple components synergistically optimize the weld joint performance, 253MA heat-resistant steel is matched, slag and electric arc regulation and control components and a reasonable process are matched, and the welding quality of the welding wire is improved.

The invention discloses a green preparation method of a silicon-containing FeCo-based nano-alloy surface composite passivation film, which comprises the steps of pretreatment, passivation solution preparation, dipping film formation and post-treatment strengthening, and the passivation solution is a silane-tannic acid composite passivation solution; according to the step of dipping and film forming, the pretreated alloy is dipped into a passivation solution, and a uniform primary film is formed; performing heat treatment and curing on the primary membrane to form a Si-O-M covalent network; and the post-treatment strengthening is that a potassium fluotitanate solution is adopted for sealing treatment, and micropores of the film layer are filled. Through molecular-level compounding of silane and TA, the passivation film with compactness, flexibility and a self-repairing function is constructed; meanwhile, nano cerium oxide is introduced as a nano filler and a corrosion inhibitor, so that the corrosion resistance is synergistically improved; and a low-temperature water-based process is used in the whole process, so that thermal damage to the nano-alloy is avoided, large-scale production can be realized, the limitation of a single-component passivation film is broken through, and an efficient and green solution is provided for anti-corrosion treatment of the high-activity nano-alloy.

The invention relates to the field of cable materials, in particular to a wear-resistant modified rubber cable material for a new energy automobile and a preparation method of the wear-resistant modified rubber cable material, and aims to solve the problems that an existing cable material for the new energy automobile is insufficient in wear resistance and mechanical strength, so that a cable is easy to crack, and potential safety hazards are caused. And the use requirements of the new energy automobile in a complex environment are difficult to meet. According to the preparation method, wear-resistant modified rubber, styrene-butadiene rubber and low-density polyethylene are used as matrixes, the comprehensive performance of the cable material is remarkably improved by integrating the advantages of the three materials, and then modified potassium titanate whiskers are added, so that the wear resistance and mechanical strength performance of the cable material are effectively improved; the cable can meet the use requirements of a new energy automobile in a severe environment, shows excellent protection performance, effectively prolongs the service life of the cable, and provides a cable transmission system which is longer in service life, safer and more reliable for the new energy automobile.

The invention relates to a high-heat-resistance and high-insulation two-component epoxy resin adhesive and application thereof, and belongs to the technical field of epoxy resin. The technical problem to be solved by the invention is to provide the high-heat-resistance and high-insulation two-component epoxy resin adhesive. The adhesive comprises a component A and a component B. The component A comprises bisphenol A epoxy resin, novolac epoxy resin, silicon carbide whiskers, potassium titanate fibers, boron phenolic resin and modified nano boron nitride. The component B is prepared from methylhexahydrophthalic anhydride, methyl tetrahydrophthalic anhydride, 2-phenylimidazole, modified aluminum oxide, polyimide micro powder and modified wollastonite. Through synergism of multiple materials, balance of heat conduction, insulation, mechanical strength and thermal stability of the adhesive is realized. Under high-frequency pulse voltage, the adhesive is long in electrical aging life. A gradient curing process is adopted for curing, complete reaction in each stage is guaranteed, and internal stress is reduced. The process fault tolerance is high, the environment compatibility is high, the cost is low, and the curing time is short.

The invention discloses a high-strength PTFE (Polytetrafluoroethylene)-based composite material, which is prepared from the following components in percentage by weight: 60 to 75 percent of polytetrafluoroethylene, 10 to 25 percent of polyimide, 5 to 10 percent of modified potassium titanate whiskers, 5 to 10 percent of modified carbon nanotubes and 1 to 5 percent of nano zinc oxide particles. By adding the modified potassium titanate and the modified carbon nanotubes, the wear resistance is improved by 50% compared with that of unmodified potassium titanate and modified carbon nanotubes; the modified potassium titanate and the modified carbon nanotubes are added, so that the optimal mechanical properties are shown at high and low temperatures; the self-assembly modification improves the dispersibility of CNF in a matrix. The tensile strength and the bending strength at room temperature are respectively improved by 29.4% and 26.7%; and the temperature is increased by 2.8% and 20.4% respectively at high temperature.

The present invention discloses a heat-conducting graphene floor heating pipe, belonging to the technical field of polymer materials, which includes an outer layer, a bonding layer and an inner layer. The outer layer comprises the following components in parts by weight: 100-189 parts of a support heat-conducting material, 150-270 parts of a matrix resin, 10-16 parts of a toughening agent, and 8-19 parts of an antioxidant; the polyethylene resin, graphene, a support material, and a hydrophobic material; the mass ratio of the graphene, the support material, and the hydrophobic material is 5:(0.8-1.2):(0.2-1):(0.1-0.8); the support material includes at least one of potassium titanate whiskers and aluminum borate whiskers. The floor heating pipe of the present invention has excellent heat-conducting performance and mechanical properties, greatly improves the heat dissipation rate, effectively improves the heating efficiency of the floor heating system, and achieves an overall high energy-saving effect.

The invention relates to the field of polypropylene composite materials, and particularly discloses a high-performance polypropylene composite material and a preparation method thereof. The high-performance polypropylene composite material is prepared from the following raw materials in parts by weight: 80 to 90 parts of polypropylene, 10 to 20 parts of polyethylene, 5 to 15 parts of glass fiber, 2 to 5 parts of nano clay, 0.5 to 1 part of coupling agent, 5 to 8 parts of potassium titanate whisker, 3 to 5 parts of heat-conducting filler and 1 to 3 parts of compatilizer. Through the synergistic effect of all the components, the prepared polypropylene composite material can be promoted to have relatively good strength and toughness, and meanwhile, the polypropylene material is endowed with heat-conducting property.

The invention provides a high-toughness austenitic stainless steel welding rod for 5Ni steel and a preparation method of the high-toughness austenitic stainless steel welding rod. The welding rod comprises a core wire and a coating coated on the surface of the core wire, and based on the total amount of the core wire, the core wire comprises the following components in percentage by mass: less than or equal to 0.09% of C, less than or equal to 0.15% of Si, 1.6-2.5% of Mn, 18.5-20.5% of Cr, 12.5-14.5% of Ni, 2.1-3.2% of Mo and 0.06-0.18% of Ti; 0.12-0.24% of Al, less than or equal to 0.007% of S, less than or equal to 0.008% of P, less than or equal to 0.006% of O, less than or equal to 0.001% of H, less than or equal to 0.012% of S + P, and the balance Fe and inevitable impurities. On the basis of the total amount of the coating, the coating comprises, by mass, 28-38% of carbonate, 15-20% of fluorite, 1-3% of lithium fluoride and sodium fluoride, 8-12% of synthetic mica, 3-6% of potassium silicotitanate, 2-4% of zircon sand, 9-15% of electrolytic manganese metal, 2-4% of ferrotitanium, 2-5% of passivated nickel-magnesium alloy, 1-3% of atomized ferrosilicon, 1-3% of lanthanum cerium fluoride, 1-3% of tungsten and molybdenum, 3-5% of nitrided ferrochromium and 1-2% of CMC. The welding rod is good in all-position welding controllability, extremely low in air hole sensitivity and excellent in low-temperature toughness, and can meet the requirements for high-quality and efficient welding of 5Ni steel.

The invention relates to the technical field of intermediate alloy metal materials, and provides a low-nitrogen vanadium-aluminum intermediate alloy and a preparation method thereof, and the low-nitrogen vanadium-aluminum intermediate alloy comprises the following components: 40-68 wt% of V, 0.001-0.003 wt% of N, and the balance of Al and inevitable impurities. The preparation method comprises the following steps: uniformly mixing raw materials of vanadium pentoxide powder and aluminum shots, charging the mixture into a furnace, carrying out exothermic smelting outside the furnace to obtain a vanadium-aluminum intermediate alloy semi-finished product, uniformly mixing potassium fluotitanate and nano carbon powder, putting the mixture as a grate-layer material at the bottom of a corundum crucible, charging the vanadium-aluminum intermediate alloy semi-finished product and the aluminum shots, and carrying out vacuum induction smelting, and the low-nitrogen vanadium-aluminum intermediate alloy is obtained. According to the preparation method provided by the invention, not only is the content of impurity nitrogen in the produced vanadium-aluminum intermediate alloy low, but also the production cost required by nitrogen removal is low.

The invention discloses a high-humidity-resistant high-barrier coating film and a preparation method thereof, and belongs to the technical field of polymer composite materials. The coating film comprises a base film and a coating layer, wherein the coating layer is prepared from a coating liquid containing an ethylene-vinyl alcohol copolymer, acetoacetyl modified polyvinyl alcohol, amino silane modified boron nitride nanosheets, hydroxyl modified potassium titanate whiskers, a water-based polyfunctional aziridine cross-linking agent and an epoxy silane coupling agent. A multi-phase synergistic system of a polymer matrix-nano material-cross-linked network is constructed, a three-dimensional barrier network is constructed by utilizing the synergistic effect of two-dimensional nanosheets and one-dimensional whiskers, and meanwhile, the number of hydrophilic groups is reduced through a specific cross-linking reaction, so that the barrier stability of the material in a high-humidity environment is remarkably improved. The film has excellent oxygen and water vapor barrier property, good mechanical strength, thermal stability and aging resistance, and can be widely applied to the field of high-end packaging of food, medicines and precise instruments.

The invention relates to the field of friction materials, and discloses an electromagnetic brake friction material used for an ultra-long time working condition and a preparation method of the electromagnetic brake friction material. The modified polyimide is a polyimide-silicon rubber interpenetrating complex, and the preparation method of the modified polyimide comprises the following steps: blending a silicon rubber prepolymer with a polyimide precursor and a silicon rubber prepolymer curing agent, and curing to obtain the interpenetrating complex; the reinforcing material comprises aramid pulp, copper fibers, potassium magnesium titanate lamellas, tetrapod-like zinc oxide whiskers and modified aluminum titanate fibers; the friction increasing material comprises nano aluminum hydroxide, fluororubber powder, barite, silicon carbide, feldspar powder, modified white carbon black and cashew nut shell oil friction powder; the antifriction material comprises halloysite nanotubes coated with redox graphene, molybdenum carbon phosphate and graphite fluoride. The friction material provided by the invention can meet the requirements of strength, heat resistance and wear resistance under an ultra-long working condition, and meanwhile, the thermal expansion at high temperature can also be reduced.

The invention relates to the technical field of plastic steel, and particularly discloses an anti-impact plastic steel profile and a preparation method thereof. The anti-impact plastic steel profile is prepared from the following raw materials in parts by weight: 60-80 parts of polyvinyl chloride, 2-8 parts of a stabilizer, 6-10 parts of a filling agent, 9-15 parts of potassium octatitanate fiber, 10-20 parts of a toughening agent and 5-8 parts of calcium sulfate. The toughening agent comprises an inner core formed by a butyl acrylate cross-linked polymer and a polymethyl methacrylate shell; the preparation method comprises the following steps: uniformly stirring the polyvinyl chloride resin, the stabilizer, the filler and the calcium sulfate, raising the temperature to 110-120 DEG C, adding the flexibilizer and the modified potassium octa-titanate fiber, reducing the rotating speed to 600-800 rpm, stirring for 3-5 minutes to obtain a mixture, and carrying out melt blending extrusion molding to obtain the PVC profile. The composition can be used in the fields of house building, door and window manufacturing and the like, and has the advantages of high impact strength and good weather resistance.

The invention relates to a polyamide composition as well as a preparation method and application thereof, and the polyamide composition comprises the following components in parts by weight: 45-75 parts of long-chain aliphatic polyamide, 5-20 parts of semi-aromatic polyamide and 0.5-7 parts of filler, the filler comprises a first filler and a second filler; the first filler comprises any one or a combination of at least two of talcum powder, glass microspheres or barium sulfate; the second filler comprises any one or a combination of at least two of calcium carbonate whiskers, calcium sulfate whiskers, wollastonite whiskers or potassium titanate whiskers. According to the invention, by compounding the rigid-flexible polyamide composition and the filler with specific composition, the prepared polyamide composition has excellent mechanical properties and fatigue resistance, can quickly recover to the original form after being bent, and has a good application prospect as a plastic badminton material.

The invention discloses a friction material, a brake pad and a preparation method of the brake pad. Comprising the following raw materials: 14-18 parts of modified phenolic resin, 10-15 parts of modified composite fiber, 4-7 parts of aramid fiber, 3-5 parts of rubber powder, 5-8 parts of steel fiber, 7-11 parts of graphite, 3-6 parts of aluminum oxide, 3-5 parts of silicon carbide, 4-6 parts of mica powder, 9-13 parts of potassium titanate whisker and 8-11 parts of barium sulfate. The modified composite fiber is prepared by the following steps: mixing basalt fiber and carbon fiber, coating lanthanum gadolinium oxide on the surface through hydrothermal reaction, modifying with silane, and finally reacting with 4, 5-diamino-2, 6-dimercaptopyrimidine. The friction material has the advantages of good mechanical properties, low wear rate, high thermal stability and stable friction coefficient, and is suitable for automobile brake pads.

The present invention belongs to the technical field of titanium metal processing waste acid treatment, and specifically relates to a method for regenerating titanium metal pickling waste liquid. The regeneration method comprises the following steps: adding a fluorosilicic acid solution to the titanium metal pickling waste liquid and mixing uniformly, then adding a potassium salt solution, stirring the reaction at room temperature, and centrifuging or filtering after the reaction is complete to separate the solid portion as a potassium fluorotitanate / potassium fluorosilicate complex; and the liquid portion as a regenerated titanium metal pickling liquid. The method of the present invention can significantly improve the titanium ion recovery rate without destroying the pickling liquid components. The titanium metal pickling waste liquid can be regenerated and reused, and has the advantages of good treatment effect and simple treatment process.

1. The name of the design product: stirring mixing equipment (potassium titanate powder). 2. The use of the design product: potassium titanate powder preparation stirring. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective drawing.

[Problem] The present invention provides a friction pair having excellent low-speed performance stability, comprising a disc brake pad having a friction material composed of a friction material composition and a stainless steel disc rotor. The friction material composition comprises a binder, a fiber base material, and a friction modifier, and is free of copper and iron-based metal fibers. [Solution] The present invention utilizes a friction material composition containing 20-30% by weight of a titanate as an inorganic friction modifier relative to the total weight of the friction material composition, and is free of mica and vermiculite. The titanate is preferably lithium potassium titanate having a layered crystal structure.

The invention belongs to the technical field of polymer composite material preparation, and particularly relates to a polytetrafluoroethylene composite material and a preparation method thereof, the preparation method comprises the following steps: S1, reinforcing phase pretreatment: S11, potassium magnesium titanate whiskers and potassium titanate whiskers are mixed, an ethanol solution of a silane coupling agent is added, mixing and drying are performed, and modified double whiskers are obtained; s12, adding nano-montmorillonite into deionized water, carrying out ultrasonic dispersion, adding a cationic surfactant, stirring, carrying out centrifugal separation, and drying to obtain organic modified nano-montmorillonite; s13, soaking the short carbon fibers in a nitric acid solution, refluxing, washing to be neutral, and drying to obtain surface hydroxylated short carbon fibers; s2, preparation of a composite emulsion: adding deionized water into a reaction kettle, sequentially adding the materials, and performing stirring and ultrasonic dispersion to form a uniform reinforced phase dispersion liquid; then adding a surfactant and an initiator, and stirring; s3, carrying out polymerization reaction; and S4, carrying out post-treatment.

The application discloses a preparation method of an environment-friendly heat-insulating and heat-preserving coating, and the specific steps of the method are as follows: 1) preparing potassium hexatitanate whiskers through a droplet template technology: dissolving oxalic acid in deionized water to obtain A; adding titanium salt and potassium salt into A and stirring to obtain B; adding B into polyvinylpyrrolidone, ethylene glycol and tetrahydrofuran, stirring and aging to obtain a uniform film; heating under the condition of nitrogen to obtain single-crystal potassium hexatitanate; placing the single-crystal potassium hexatitanate in an alumina crucible, heating, quenching between two thick copper plates and cooling in liquid nitrogen; passing oxygen through the sample to obtain potassium hexatitanate whiskers through annealing; 2) preparing the environment-friendly heat-insulating and heat-preserving coating: mixing water, a dispersing agent, a wetting agent, ethylene glycol and a defoaming agent, adding hydroxyethyl cellulose and a pH regulator, further adding potassium hexatitanate whiskers and nano-silica aerogel and dispersing, and sequentially adding a water-based high-elastic emulsion, a water-based silicone-acrylate emulsion, a film-forming aid, a flame retardant, micrometer hollow glass microbeads, a bactericide and a near-infrared reflective material and stirring uniformly.

The invention belongs to the technical field of fireproof heat-insulating materials, and provides waterborne polyurethane, a preparation method thereof and a fireproof heat-insulating coating. The polyhydroxy compound, the isocyanate compound, the hydrophilic chain extender, the cosolvent, the organic bismuth catalyst, the neutralizer and the water are adopted as main preparation raw materials of the waterborne polyurethane, and the waterborne polyurethane does not need to use acetone and is safer and more environmentally friendly. The fireproof heat-insulating coating can be further prepared by compounding the waterborne polyurethane resin with potassium hexatitanate whiskers, nano silicon dioxide, rutile nano TiO2, nanofiber tubes, hollow microspheres and silicate polymers, not only has excellent fireproof, heat-insulating, corrosion-resistant, protective, weather-resistant and adhesive force, but also is more environment-friendly and safer by using water as a medium, and is suitable for popularization and application. The method can be widely applied to the fields of preparation of new energy materials, batteries, automobiles, energy storage materials, aerospace, intelligent machines, anti-corrosion materials, electronic and electric appliance manufacturing and the like.

The application relates to the technical field of welding materials, and particularly discloses a high-temperature-resistant flux-cored wire containing rare earth elements and a preparation method thereof. The high-temperature-resistant flux-cored wire containing rare earth elements comprises a wire sheath and a core; the core comprises the following raw materials: dehydrated rutile, dehydrated potassium feldspar, zircon sand, metal chromium powder, metal nickel powder, electrolytic manganese, ferrotitanium, aluminiferous iron, potassium cryolite, potassium titanate, sodium titanate, iron powder, yttrium-based iron alloy powder, atomized ferrosilicon, chromium-iron nitride, bismuth oxide, an additive, and the balance of reduced iron powder; the additive is a mixture of zirconium-iron alloy, ferrotitanium alloy and aluminum-magnesium alloy. The application introduces a specific alloy additive into the core to protect the transition of the rare earth yttrium, optimizes the welding performance of the yttrium and multiple components in cooperation, matches the 253MA heat-resistant steel, adjusts the components of the molten slag and the electric arc, and reasonably processes the technology, so that the welding quality of the wire is improved.

This application relates to a copper-aluminum brazed terminal block and its manufacturing method, belonging to the field of power fittings technology. It consists of an aluminum-based terminal block with a copper sheet welded to it. The flux used in the welding is a high-performance, non-corrosive copper-aluminum flux composed of the following components: potassium fluoroaluminate, cesium ammonium fluoride, 1-butyl-3-methylimidazolium tetrafluoroborate, potassium fluorotitanate, and nano-copper oxide. The process involves chemically stripping the dense alumina film using highly active fluorine species released from a pure fluorinated ionic liquid, achieving film removal and avoiding the thermal effects of high temperatures. Secondly, a nano-titanium transition layer is generated in situ through a liquid-phase displacement reaction of potassium fluorotitanate on the nascent aluminum surface, achieving a qualitative change in joint strength from mechanical interlocking to intrinsic metallurgical bonding. Finally, the elimination of chlorine and the presence of a self-cleaning mechanism prevent the flux from absorbing moisture and hydrolyzing or causing electrochemical corrosion, thus ensuring long-term reliability and durability of the joint under harsh environments while achieving good connection performance.

The invention discloses a production system of high-flowability moisture-proof sodium potassium titanate, and relates to the technical field of sodium potassium titanate, the production system comprises a pulsed electric field in-situ moisture-proof layer synthesis unit, a multistage cyclone coupling fluidized bed modification unit and a block chain quality closed-loop control unit, the pulsed electric field in-situ moisture-proof layer synthesis unit comprises a nitrogen-protected closed reaction kettle, a high-frequency ultrasonic disperser and a multi-stage pulsed electric field generator, the high-frequency ultrasonic disperser applies a 0.5-20 MHz pulsed electric field, the field intensity of the pulsed electric field is 10-30 kV / cm, the duty ratio of the pulsed electric field is 15%-90%, and the multi-stage pulsed electric field generator is used for generating the moisture-proof layer. The high-frequency ultrasonic disperser enables a nano rare earth silicate composite coating layer to be generated in situ on the surface of sodium potassium titanate particles, the thickness of the nano rare earth silicate composite coating layer is 10-50 microns, the humidity sensitivity of the nano rare earth silicate composite coating layer is 0.1%-0.3%, the multi-stage rotational flow coupling fluidized bed modification unit comprises three stages of fluidized beds which are arranged in series, and the three stages of fluidized beds are connected in parallel. The inclination angle of the inclination-angle-adjustable swirl nozzle array arranged at each stage is 10-60 degrees, and the distance is 1.2-2.5 times of the particle diameter.

The present invention relates to a potassium magnesium titanate capable of increasing the friction coefficient of a high load region when used in a friction material, the potassium magnesium titanate being represented by the compositional formula KxMg0. 4Ti1. 6O4-y in which x is 0.1 < = x < = 0.6 and y = (0.8-x) / 2, the ratio (Ia / Ib) of the peak area (Ia) at 100 cm <-1 > to 165 cm <-1 > to the peak area (Ib) at 215 cm <-1 > to 1-325 cm <-1 > in the Raman spectrum of the potassium magnesium titanate being 0.03 or more, and the ratio (Ia / Ib) of the peak area (Ib) at 215 cm <-1 > to 325 cm <-1 > being 0.03 or more. The ratio (Ic / Ib) of the peak area (Ic) at 785 cm <-1 > to 900 cm <-1 > to the peak area (Ib) at 215 cm <-1 > to 325 cm <-1 > is 0.40 or less.

This application belongs to the field of inorganic chemical waste recycling and fluoride preparation technology, specifically relating to a method for preparing potassium fluorotitanate from hydrofluoric acid waste liquid. The method includes: S1. Pretreatment of hydrofluoric acid waste liquid and titanic acid powder; S2. Adding the pretreated hydrofluoric acid waste liquid and titanic acid powder to a reaction vessel to generate a fluorotitanic acid solution; S3. Adding potassium carbonate to the fluorotitanic acid solution to generate potassium fluorotitanate, followed by purification of the reaction solution to obtain potassium fluorotitanate crystals; S4. Washing and drying the potassium fluorotitanate crystals to obtain a high-purity potassium fluorotitanate product. This application uses titanic acid powder as the titanium source and optimizes reaction parameters to achieve the dual goals of resource recovery from hydrofluoric acid waste liquid and low-cost preparation of high-purity potassium fluorotitanate.