143 results about "Potassium titanate" patented technology

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 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 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 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.

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.

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 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.

This utility model relates to the field of potassium titanate whisker preparation technology, and discloses a raw material mixing device for preparing corrosion-resistant potassium titanate whiskers, including a cylinder with a mixing mechanism disposed on the circumferential surface of the cylinder. The mixing mechanism includes a support frame rotatably mounted on the circumferential surface of the cylinder, a groove formed on the inner side of the support frame, a large gear fixed on the circumferential surface of the cylinder, and the large gear located inside the groove. A fixing plate is fixed on the top circumferential surface of the support frame, and a servo motor is fixed on the side of the fixing plate. A small gear is fixed to the output end of the servo motor through the fixing plate. Through the structure of the mixing mechanism, this utility model, with the cooperation of the servo motor, drives the large gear to rotate via the small gear, thereby providing power for the rotation of the cylinder. This causes the cylinder to rotate inside the support plate, and with the cooperation of the spiral blades, the raw materials inside the cylinder can be stirred and mixed, resulting in more uniform mixing and higher mixing efficiency.

The invention provides a modified nano composite material, a preparation method of the modified nano composite material and a brake pad prepared from the modified nano composite material. The composite material comprises the following raw materials: 20-30 parts of an interpenetrating network polymer, 10-18 parts of a double-core self-repairing microcapsule, 4-8 parts of silane modified nano-zinc oxide, 1-3 parts of copper fibers, 8-15 parts of a wear-resistant filler, 6-12 parts of crystalline flake graphite, 5-10 parts of barium sulfate, 7-13 parts of potassium titanate whiskers, 1-2 parts of a release agent and 2-4 parts of a curing agent. According to the invention, the brake pad has good corrosion resistance, friction stability, mechanical properties and self-repairing capability.

The present application belongs to the technical field of conveying, and particularly relates to a spiral conveying device for potassium hexatitanate and a conveying method thereof. The spiral conveying device for potassium hexatitanate comprises: a feeding hopper arranged at the top of the feeding end of a machine body; a discharging pipe arranged at the bottom of the discharging end of the machine body; a hot air adjusting mechanism comprising: a positioning pipe slidingly arranged at the end of the machine body; a hot air pipe rotatably arranged in the positioning pipe and in communication with a hot air machine; and a plurality of adjusting members hingedly connected at one end of the hot air pipe and in the shape of a circular arc. When conveying material, each adjusting member is turned outward and expanded relative to the hot air pipe, and the hot air sent out from the hot air pipe is diffused to the machine body through the inner wall of each adjusting member. When the discharging pipe is blocked, the material pushes the positioning pipe to slide outward, the positioning pipe pushes each adjusting member to turn inward and gather, and the hot air sent out from the hot air pipe impacts and clears the material through the inner wall of each adjusting member.

The invention relates to the technical field of cables, and provides an extruded insulation low-voltage power cable which sequentially comprises a conductor, an insulation layer, an armor layer and a sheath layer from inside to outside. The sheath layer is prepared from the following raw material components in parts by weight: 80 to 100 parts of polyvinyl chloride, 10 to 20 parts of ethylene propylene diene monomer, 15 to 25 parts of ethylene vinyl acetate copolymer, 20 to 30 parts of filler, 25 to 35 parts of flame retardant, 3 to 5 parts of plasticizer, 1 to 3 parts of antioxidant and 3 to 5 parts of compatilizer; the filler is obtained by modifying potassium titanate whiskers with a titanate coupling agent and diethyl aminovinylmalonate, and the insulating layer is obtained by extruding an insulating layer material on the outer side of the conductor. According to the technical scheme, the problem of insufficient tensile strength of the sheath layer in the prior art is solved.

The present application relates to the technical field of welding material, in particular to a high-toughness gas shielded welding wire and a preparation method thereof.The welding wire comprises a low-carbon steel belt sheath and a flux cored powder, and the flux cored powder comprises reduced iron powder, manganese powder, carbonyl nickel powder, molybdenum powder, titanium powder, silicon powder, graphite powder, rutile titanium dioxide, calcium fluoride, potassium fluorotitanate and cerium-aluminum co-doped microparticle powder; the cerium-aluminum co-doped microparticle powder takes calcium-rich borosilicate as a core, is treated by isopropanol aluminum hydrolysis polycondensation sealing, aluminum oxide nanoparticle enhancement, aluminum nitrate-colloidal silicon dioxide bridging and cerium nitrate outer layer, and is prepared; the welding wire is suitable for high-strength steel thick plate multi-layer multi-pass gas shielded welding, can improve low-temperature impact toughness and refine inclusions while maintaining high deposited metal strength.

The invention discloses a high-manganese steel flux-cored wire for surfacing and a preparation method of the high-manganese steel flux-cored wire, and relates to the technical field of welding materials, the high-manganese steel flux-cored wire is composed of a steel outer skin and a flux core, the flux core is wrapped in the steel outer skin, and the flux core comprises, by weight, 0.1-0.6 part of natural rutile, 0.2-0.8 part of ferrosilicon powder and 0.1-0.3 part of potassium titanate. The material comprises, by weight, 20-30 parts of magnesium powder, 0.1-0.4 part of magnesium powder, 0.1-0.3 part of fluoride, 8-11 parts of electrolytic manganese powder and 0.1-0.5 part of quartz sand. Through organic combination of the components, the Brinell hardness HB of deposited metal after welding of the welding wire is larger than or equal to 170. And the wear resistance of the whole welding seam is effectively improved. The welding process performance is good, electric arcs are stable, splashing is small, and formed weld joints are attractive.

This disclosure provides a polyether-ester elastomer with a high stain hardening ability, wherein the thermoplastic polyether-ester elastomer contains polyester hard segment, polyether soft segment and at least one inorganic compound. The inorganic compound is selected from the group consisting of silicon dioxide, titanium dioxide, zinc oxide, aluminum oxide, aluminum silicate, zirconium oxide, potassium titanate and derivatives thereof. This disclosure also provides a polyether-ester elastic fiber which is characterized by a stress-strain curve with a specific profile. This disclosure also provides a process for preparing the polyether-ester elastomer, a process for preparing the polyether-ester elastomer fiber, use of the polyether-ester elastomer or polyether-ester elastomer fiber, and a polyether-ester elastic material comprising the polyether-ester elastomer.

The application relates to the field of titanate, in particular to a preparation method of potassium titanate whisker and titanium dioxide whisker products. The preparation method of the potassium titanate whisker and the titanium dioxide whisker products is synthesized by adopting a high-temperature sintering and natural slow cooling process method, and the preparation method is characterized by the following steps: S1. mixing; S2. high-temperature sintering and melting; S3. solidification and crushing; S4. dilution decomposition adjustment conversion; S5. drying; and S6. high-temperature sintering setting. The application has low cost and complete whisker.

The invention provides a welding rod for nickel-chromium-cobalt-molybdenum high-temperature alloy welding and a preparation method of the welding rod, and relates to the technical field of welding materials. The welding rod for nickel-chromium-cobalt-molybdenum high-temperature alloy welding comprises a core wire and a coating, and the coating comprises, by mass, 22%-30% of rutile, 29%-38% of marble, 3.5%-5.0% of fluorite, 18%-24% of cryolite, 3.5%-5.0% of potassium titanate, 0.8%-1.5% of cobalt powder, 0.8%-1.5% of molybdenum powder, 1.5%-3.0% of ferroniobium, 0.8%-1.5% of manganese metal, 0.8%-1.5% of reduced iron powder, 0.4%-1.0% of sodium alginate, 0.8%-1.5% of sodium carbonate and 0.4%-1.0% of CMC. When the welding rod is used for carrying out submerged arc horizontal position welding on the nickel-chromium-cobalt-molybdenum high-temperature alloy, the electric arc stability is good, deslagging is good, forming is attractive, deslagging is easy, deposited metal components are stable, and the mechanical property is excellent.

The invention relates to a high-wear-resistance low-noise brake pad and a preparation method thereof. The brake pad comprises the following raw materials in parts by weight: 6-8 parts of phenolic modified resin; 2-3 parts of powdered rubber powder; 2-3 parts of aramid fiber; 3-5 parts of mineral reinforced fibers; 4-6 parts of metal fiber; 8-12 parts of calcium sulfate whisker; 10-20 parts of precipitated barium sulfate; 2-5 parts of zirconium silicate; 3-5 parts of friction powder; 2-4 parts of fresh raw graphite; 6-8 parts of artificial granular graphite; 2-3 parts of antimony oxide; 3-5 parts of modified light magnesium oxide; 3-4 parts of an antistatic agent; 0.3 to 0.5 part of brown aluminum oxide; and 3-6 parts of potassium titanate whiskers. The brake pad has the advantages of excellent braking performance, low noise, low dust generation and good high temperature resistance, and excellent balance is achieved between two commonly contradictory performances of high wear resistance and low noise.

The invention discloses low-rolling-resistance tire tread rubber and a preparation method thereof, and belongs to the technical field of rubber.The low-rolling-resistance tire tread rubber is prepared by adopting high-strength aging-resistant butadiene styrene rubber and natural rubber as basic rubber, modifying potassium hexatitanate whiskers through gamma-methacryloxypropyltrimethoxysilane, endowing the potassium hexatitanate whiskers with double bonds, and then conducting irradiation to obtain the low-rolling-resistance tire tread rubber. The modified potassium hexatitanate whisker can be stably dispersed in a polymerization network of the high-strength aging-resistant styrene-butadiene rubber, so that the filler dispersion and chain segment movement capability in the rubber is optimized, the rolling resistance is remarkably reduced, and the whole material is endowed with good aging resistance and mechanical strength; according to the modified styrene-butadiene rubber latex disclosed by the invention, by utilizing the characteristics of carbon-carbon double bonds and high-reaction-activity epoxy groups in glycidyl methacrylate, the epoxy groups on glycidyl methacrylate are chemically bonded with amino groups in an anti-aging component p-aminodiphenylamine, so that the relative molecular mass of the anti-aging component is increased, and the carbon-carbon double bonds are introduced; a site is provided for forming a co-vulcanization system through reaction with rubber.

This invention discloses a high-temperature resistant, high-strength, low-elasticity, high-density cementing material, relating to the field of cementing materials technology in oil and gas development. It comprises the following components by weight: 100 parts oil well cement; 35-40 parts strength stabilizing material; 50-300 parts density regulator; 0.3-0.5 parts high-strength toughening material; 0.8-1.5 parts flexible sealant; 0.2-0.4 parts suspension stabilizer; 0.5-0.8 parts dispersant; 2-3 parts fluid loss reducing agent; and 0.8-2.0 parts retarder. The oil well cement is of grade G and grade D. The mixed oil well cement has a cement mass ratio of 8:2. The high-strength toughening material is a mixture of modified carbon fiber, modified polyether ether ketone fiber, modified polyether sulfone fiber, β-type silicon carbide whiskers and potassium hexatitanate whiskers in a mass ratio of 40-60:15-25:15-25:5-8:2-4. The flexible sealant is a mixture of high-temperature resistant modified polycarbonate and sulfonated asphalt in a mass ratio of 8:2. This mixture can achieve self-toughening of the cement stone, so that the prepared cement slurry not only has good construction performance, but also has the characteristics of high strength and low elastic modulus under high temperature conditions.

The invention generally relates to a high polymer material modification technology, in particular to a nylon 6 composite material and a preparation method thereof, and the nylon 6 composite material comprises the following raw materials by mass: 60-75 parts of nylon 6; 8 to 15 parts of lamellar potassium titanate whisker; 5-12 parts of glass fiber and / or carbon fiber; 1-3 parts of molybdenum disulfide; 2 to 4 parts of nano montmorillonite; 4-5 parts of a coupling agent; 3 to 5 parts of a crosslinking compatilizer; 1-2 parts of a tackifier; and 0.5 to 1.5 parts of an antioxidant. The high-friction and high-viscosity nylon 6 composite material is successfully prepared through collaborative design of the lamellar potassium titanate whiskers and the fiber filler in combination with precise regulation and control of the tackifier.

The invention provides an E6011 type cellulose welding rod and a preparation method thereof. The welding rod comprises a core wire and a coating, and the surface of the core wire is coated with the coating in a pressed mode; the coating is prepared from, by weight, 10-15 parts of potassium titanate, 10-15 parts of rutile, 18-21 parts of microcrystalline cellulose, 3-5 parts of manganese metal, 5-10 parts of fused magnesite, 9-12 parts of iron sand, 30-35 parts of iron powder, 5-8 parts of CMC-Ca and 0.5-1 part of rare earth ferrosilicon. According to the coating, a titanium type slag system is adopted, and a composite blowing force system is constructed to stabilize electric arcs and enhance electric arc blowing force, so that welding spatter and smoke dust are reduced; the slag alkalinity is adjusted by introducing alkaline oxide and CMC-Ca, so that the liquidity of molten iron during vertical downward welding is effectively controlled, and the process adaptability and the production convenience are both considered; and the high-proportion iron powder is added to improve the deposition efficiency, sleeve carbonization is inhibited through the synergistic effect of the magnesia and the iron sand, and the re-arc striking performance of the welding rod is improved. Splashing and smoke dust amount in the welding process can be remarkably reduced, and the comprehensive welding performance is excellent.

This invention relates to the field of automotive reinforcement plate technology, specifically to a corrosion-resistant, high-rigidity right rear shock absorber mounting reinforcement plate and its preparation method. The plate comprises the following raw materials by weight: 100 parts matrix alloy powder, 8-12 parts additive A, 5-9 parts additive B, 3-5 parts graphite powder, 2-3 parts zinc stearate, 3-4 parts polyvinyl alcohol, 0.4-0.6 parts graphite carbon powder, and 0.8-1.5 parts electrolytic copper powder. In this invention, additive A is prepared as a composite additive through a zirconium precursor mixture and a magnesium precursor mixture, forming a uniformly dispersed zirconium-magnesium composite ceramic phase in the iron-based alloy matrix. This effectively refines the alloy grains, strengthens grain boundaries, and improves the stiffness and mechanical strength of the reinforcement plate. Additive B uses a potassium fluorotitanate and cerium nitrate composite treatment solution as its core, combined with polyaniline and sulfosalicylic acid for in-situ film formation, optimizing the sintering interface bonding force and effectively improving corrosion resistance life under salt spray conditions.

The invention belongs to the technical field of resistance materials, and particularly relates to special zinc oxide varistor ceramic powder with a positive temperature coefficient for photovoltaic direct current as well as a preparation method and application of the special zinc oxide varistor ceramic powder. The zinc oxide varistor ceramic powder is prepared from the following raw materials in parts by weight: 80 to 90 parts of zinc oxide, 2 to 4 parts of bismuth oxide, 2 to 5 parts of antimony trioxide, 1 to 5 parts of cobaltosic oxide, 1.5 to 6 parts of manganese carbonate, 0.5 to 5 parts of boric oxide, 0.03 to 0.05 part of potassium hexatitanate whisker and 0.05 to 0.1 part of stabilizer. According to the ceramic powder, the potential gradient and the nonlinear coefficient of the piezoresistor can be remarkably improved, and meanwhile, the stability of the electrical property of the piezoresistor is kept, so that the operation reliability of the piezoresistor is improved.

The application belongs to the technical field of composite materials, and particularly discloses a fiber hybrid membrane for synchronously removing radioactive cesium and strontium as well as a preparation method and application thereof. The preparation method comprises the following steps: adjusting the pH of a beta-lactoglobulin solution, centrifuging, collecting the supernatant, filtering, dialyzing, freeze-drying, and obtaining beta-lactoglobulin monomers; dissolving the beta-lactoglobulin monomers in ultrapure water, adjusting the pH, and water-bath heating to obtain an amyloid fiber solution; adding potassium titanate to the amyloid fiber solution, adjusting the pH, and obtaining amyloid fiber loaded with titanium dioxide; and mixing the amyloid fiber loaded with titanium dioxide with activated carbon to obtain an amyloid fiber hybrid membrane. The fiber hybrid membrane for synchronously removing radioactive cesium and strontium and the preparation method and application thereof have high membrane flux, excellent adsorption selectivity and cycle performance, can accurately adsorb radioactive cesium and strontium in a complex seawater system, and do not produce secondary waste in the treatment process, and are low in price.