38results about How to "Good high temperature stability" patented technology

The invention relates to a preparation method of zirconium oxide-silicon oxide composite aerogel. The method comprises the following steps of: dissolving siloxane in alcohol and uniformly stirring the solution to obtain alcohol solution of the siloxane; titrating concentrated nitric acid with 65-68% of mass concentration, titrating deionized water after stirring uniformly and continuously stirring; titrating the concentrated nitric acid to the pre-hydrolyzed siloxane solution, titrating zirconium alkoxide after mixing uniformly, adding the deionized water after stirring uniformly and stirring continuously to obtain clear and transparent gel; transferring the gel to a mould, and still standing and aging the gel to obtain the zirconium oxide-silicon oxide composite wet gel; soaking the wet gel by using aging solution; and finally soaking the gel by using absolute ethyl alcohol or isopropanol solvent. The blocky zirconium oxide-silicon oxide composite aerogel featured with low density and low thermal conductivity prepared by the invention basically keeps the former microcosmic undefined structure after thermal treatment at 1000 DEG C, and has specific area up to 353m<2> / g and good high-temperature stability.

The invention discloses a permeable pavement structure which is provided with a surface layer of a porous bitumen mixing material, a middle surface layer of the porous bitumen mixing material, a permeable open grading lower surface, a grading gravel base layer, a filtering layer, a geotextile layer and a soil base layer from top to bottom. The invention overcomes the defects caused by the watertightness of a traditional pavement, provides the pavement structure with good noise reducing and skidproof functions and good pavement performance of high temperature stability, abrasion resistance, fatigue resistance, water damage resistance and the like, and is widely applied to various roads of sidewalks, parkways, bicycle roads, parking lots, residential quarters and the like.

The invention provides an infrared radiation material. In the infrared radiation material, a high-concentration crystal defect spinel structure compound is synthesized at high temperature by using various transitional metal oxides and rare earth metal oxides as raw materials. The infrared radiation material has the advantages of high high-temperature stability and high emissivity. The invention also provides high-temperature infrared coating produced by using the infrared radiation material. The high-temperature infrared coating comprises the following components in part by mass: 67 to 73 parts of acidic silicon sol, 0.005 to 0.02 part of ammonium polyacrylate and 28 to 32 parts of mixed powder, wherein the mixed powder comprises the following components in part by mass: 48 to 52 parts of fused quartz, 32 to 37 parts of cordierite, 1 to 3 parts of boron nitride and 10 to 14 parts of the infrared radiation material. The high-temperature infrared coating has high adhesive property, high surface drying speed, low-temperature sintering property and high temperature resistance. The invention further provides a production process of the infrared radiation material and a production process of the high-temperature infrared coating. The production processes are easy and convenient in operation.

The invention relates to a hydrogen absorbing and releasing alloy material with the formula of A(1-x)Bx, wherein A is at least one of Ti, Zr, Mg and rare-earth RE; B is at least one of Hf, Nb, Cr, Ca, Cu, Ni, Mo, Fe, Co, Al, Mn and Si; x is the mol ratio from 0.05 to 0.90; the rare-earth RE comprises at least one of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; and the usage temperature of the alloy is higher than 200 DEG C. Further, the invention relates to a hydrogen absorbing and releasing alloy material of an anti-phase splitting multicycle vacuum interlayer applied to the pollution control of the tail gas of motor vehicles. The hydrogen absorbing and releasing alloy has overstable capacity of anti-high temperature phase splitting and repeated hydrogen absorbing and releasing processes for ten thousand times and can be used for solving the problem of cold start pollution of the tail gas of vehicles or particle pollution of the tail gas of diesel engine road vehicles.

The invention relates to a high-temperature solar selective absorption coating, which is characterized by sequentially comprising an infrared reflecting layer, a first absorption layer, a second absorption layer and an anti-reflection layer from a substrate to the surface. Raw materials selected for the coating are conventional materials, the application range is wider, the forming performance is good, the raw materials can be processed into a cylindrical target material, the utilization rate of the target material is remarkably improved, and the price is also low, so that the working cost can be further reduced. The high-temperature solar selective absorption coating is suitable for a solar heat collection pipe with medium and high working temperatures.

The invention relates to the technical field of metal-based composite material preparation and provides a preparation method of a self-propagating synthesis TiB2 particle-reinforced copper-based surface composite material and a composite copper casting. The preparation method comprises the following steps: mixing metal powder such as B2O3 powder, Ti powder, Al powder and Cu powder by a vacuum lost foam casting process and an SHS (Self-propagating High-temperature Synthesis) technology, adding a bonding agent for preparing into SHS powder paste, applying the SHS powder paste onto the work surface of the casting, producing a self-propagating synthesis reaction due to a high temperature of a copper metal solution in a pouring process to generate a TiB2 particle hard phase, and finally obtaining the surface self-propagating synthesis TiB2 particle-reinforced copper-based surface composite casting. The composite copper casting has the advantages that the compactness of a particle-reinforced alloy layer of the composite copper casting is high, and the composite copper casting is metallurgically bonded with a basic body and is high in strength, good in heat conductivity and high-temperature frictional wear resistance and suitable for various wear-resistant copper alloy parts working in high-temperature wear-resistant work conditions.

The invention relates to a small and medium-sized steel bridge deck pavement system, which is characterized in that: the pavement system is provided with a waterproof layer, a bonding layer, a waterproof modified asphalt sand layer, a hot spray SBS modified asphalt layer and a high viscosity modified asphalt layer respectively from the bottom up. The waterproof layer involved in the invention adopts a modified epoxy resin waterproof layer, and blocks corrosion of the steel bridge deck. The bonding layer adopts bonding particles and gravel, improves the adhesion between asphalt sand and the waterproof layer, and the asphalt sand mixture has the flexibility of a poured asphalt mixture, however the high temperature stability of the asphalt sand mixture is greatly improved compared to the poured asphalt mixture. The high viscosity modified asphalt layer serves as a slip resistant surface layer and endows the system with good high temperature stability, low temperature crack resistance and stress relaxation ability. The pavement layer has low requirements for construction environment conditions, does not need special construction equipment and has no harsh technological requirements. Generally, the pavement system has the advantages of good high temperature stability, strong anti-rutting ability, strong crack resistance, good water tightness, no water seepage, and good deformation compliance. The construction technology is mature, the construction period is short, the pavement system can be immediately opened to traffic, and the engineering cost is low.

The invention discloses novel condensed lubricant and a preparation method thereof. The novel condensed lubricant is prepared from the following raw materials by weight portion: 5 to 15 portions of esters, 30 to 50 portions of hydrocarbons, 30 to 40 portions of tertiary basic oil, 3 to 8 portions of synthetic fatty acid, 3 to 6 portions of oiliness agent, 1 to 3 portions of oxidation and corrosion inhibitor, 0.5 to 2.5 portions of antifriction and 1 to 3 portions of extreme pressure agent, wherein the ethers are one or more than one selected from NP343, NP372 and P81; the hydrocarbons are oneor more than one selected from PA08, PA06 and PA012; the tertiary basic oil is one or more than one selected from 150N, 75N and HL-68; the synthetic fatty acid is one or more than one selected from azelaic acid, sebacic acid and cinnamic acid; the oiliness agent is one or more than one selected from T405A, T403 and T405; the oxidation and corrosion inhibitor is one or two selected from T203 and T204; the antifriction is one or more than one selected from boron-nitrogen compounds, T304, T301 and 309; and the extreme pressure agent is one or two selected from T361A and 3745P. The novel condensed lubricant has superior high-temperature stability, antioxidation stability, abrasion resistance, corrosion resistance and anti-rust performance, strong adhesivity and permeability and small volatility, can form a solid lubricant membrane on the surface of metal, effectively reduce energy consumption and splash, and prolong the service life of equipment, and does not pollute the working environment.

The invention discloses a surface protection method for a samarium-cobalt magnet workpiece. The surface protection method comprises the following steps: depositing an Ni-based thin film on the surface of a pretreated samarium-cobalt magnet workpiece; and then carrying out vacuum heat treatment to obtain a surface protected samarium-cobalt magnet. In the surface protection method, the Ni-based thin film of a compact structure is obtained through the deposition on the surface of the samarium-cobalt magnet, so that oxidizing media can be effectively isolated; a protective film is redeposited on the surface of the Ni-based thin film, so that the protective performance of the thin film can also be improved furthermore; the deposited Ni-based thin film and Al2O3 thin film are of excellent high-temperature stability, so that samarium cobalt can be effectively protected under a high temperature, and then the problem that the samarium-cobalt magnet workpiece can be oxidized in a high-temperature environment to cause magnetic performance degradation is improved.

The invention provides a laser additive manufacturing high-strength heat-resistant rare earth aluminum alloy and a preparation method thereof. The preparation method comprises the following steps: an aluminum ingot is heated and molten into molten aluminum; required elements are added into the molten aluminum to form alloy liquid, specifically, the alloy liquid comprises, by mass: 1.00%-10.00% of Ce, 0.05%-2.00% of Mg, 0.10%-0.50% of Zr, 0.10%-7.50% of Y, 0.05%-0.50% of Fe, 0.10%-2.00% of Si, and the balance Fe; the alloy liquid is guided out through a flow guide pipe, the alloy liquid is impacted through air flow to form particles, and the particles are solidified into spherical alloy powder; and the spherical alloy powder is rapidly molten, solidified and formed through selective laser melting to obtain the high-strength heat-resistant rare earth aluminum alloy. The high-strength heat-resistant rare earth aluminum alloy has a nanoscale eutectic three-dimensional network skeleton structure, is high in density, has excellent room-temperature and high-temperature mechanical properties, and is relatively low in density.

The invention relates to a composite oxide catalyst for catalytic combustion of soot particles in diesel engine exhaust. The composite oxide catalyst has the following composition: Ce2O2-MOx / Lax' A(1-x)' Mny B(1-y) O3, wherein M is one or more in Zr, Pr, Sm or Y, A is one or more in K, Ca, Ba or Sr, and B is one or more in Cr, Fe, Co or Ni. The soot combustion catalyst has good performance of removing soot in a catalytic way, and is low in cost, simple in preparation process and easy in industrial application.

The invention discloses copper rod complete-synthesis coarse-drawing lubricating fluid and a preparation method as well as a use method thereof. The copper rod complete-synthesis coarse-drawing lubricating fluid is prepared from the following components in parts by weight: 0.5-1 part of copper protectant, 3-5 parts of mixed emulsifier, 20-40 parts of water-based extreme pressure lubricant, 1-2 parts of boric acid, 2-5 parts of cholamine, 2-5 parts of monobutyl ether coupler, 0.5-1 part of hard water resistor, 0.01-0.1 part of defoamer, 0.01-0.1 part of triethanolamine borate antirust agent and 20-25 parts of distilled water; the copper rod complete-synthesis coarse-drawing lubricating fluid is used by being diluted with water according to a ratio of 1:5-20. The copper rod complete-synthesis coarse-drawing lubricating fluid has the advantages that the lubricating property, cooling property and oxidation resistance can be matched with cleaning property for a long term, stableness is achieved, and the service cycle is long.

The invention provides a ready-to-use high-dispersion high-viscosity modifier and a preparation method thereof. The modifier comprises, by weight, 20-60 parts of polymer modifier, 5-10 parts of swelling agent, 20-45 parts of dispersing agent, 4-10 parts of plasticizer and 0.2-0.5 part of crosslinking agent. The method includes the following steps that first, the polymer modifier and the swelling agent are heated for 30-60 minutes at the temperature of 100 DEG C to be swelled to be in a flowing state, then the mixture is poured into the dispersing agent which is already heated to be in a flowing state, the plasticizer and the crosslinking agent are added, and then the mixture is sheared for 5-15 minutes through a high-speed shearing machine, wherein the rotating speed of the high-speed shearing machine is 1000-3000 r / min, and the temperature ranges from 140 DEG C to 180 DEG C; after completion, the mixture is poured into an evaporating vessel, then the evaporating vessel is put into a vacuum drying box of 120 DEG C to be kept warm for 1 h, and then the mixture is pulled into strips, extruded out and granulated through a single-screw extruder. The production cost is low, dispersion and evenness are excellent, the high-temperature stability of high-viscosity modified asphalt can be further improved, and social and economic benefits are remarkable.

The invention relates to a preparation method of an efficient zinc oxide fine desulfurizing agent. The preparation method comprises the steps of enabling a sodium carbonate solution and a mixed solution of soluble zinc salt, soluble active aid salt and soluble carrier aid salt to react in a reactor of a microwave heating oven, carrying out microwave radiation aging and filtration under a stirring condition, preparing material liquid from a filter cake, carrying out spray drying and roasting, so as to obtain the finished desulfurizing agent. The efficient zinc oxide fine desulfurizing agent is high in sulfur capacity, simultaneously applicable to low-temperature, medium-temperature and high-temperature desulfurization and good in thermal stability.

The invention discloses an ice-condensation-resistant asphalt mixture. The composite material comprises the following components in parts by weight: 150 to 250 parts of aggregate, 50 to 80 parts of mineral powder, 10 to 20 parts of calcium sulfate, 60 to 100 parts of an asphalt matrix, 20 to 30 parts of magnesium chloride, 8 to 15 parts of ethylene glycol, 2 to 6 parts of a silane coupling agent,2 to 6 parts of terpene resin, 3 to 8 parts of zeolite, 6 to 13 parts of diatomite, 1 to 3 parts of polypropylene fiber, 1 to 3 parts of dimethyl silicon oil, 2 to 6 parts of maleic anhydride and 1 to3 parts of a corrosion inhibitor. The ice-condensation-resistant asphalt mixture provided by the invention has the following advantages: the aggregate and the mineral powder have good adhesion to asphalt; high-temperature stability is good; meanwhile, ice condensation resistance is good, so the freezing point of pavements in winter can be effectively reduced; the effect of slow release is achieved, so the ice condensation resistance has certain long-lasting durability; in addition, the ice-condensation-resistant asphalt mixture has high-temperature performance, low-temperature performance, water stability and pavement performance.

The invention discloses a preparation method of an asphalt regenerating agent and belongs to the fields of asphalt regenerating agents. The preparation method comprises the following steps: mixing modified bentonite and water and uniformly stirring; adjusting the pH (Potential of Hydrogen) value to 9 to 10; adding a mixture which is 30 to 40 percent of the mass of bentonite and stirring at the temprature of 50 to 60 DEG C for 1 to 2h, so as to obtain a stirring solution; pouring the stirring solution into an emulsifying machine and stirring for 25 to 30s; then adding a stirred material which is 3 to 4 times of the mass of the stirring solution and has the temperature of 130 to 140 DEG C and mixing and stirring for 20 to 30min; then adding a plasticizer which is 30 to 40 percent of the massof the stirring solution and stirring for 10 to 15min; cooling to room temperature to obtain the asphalt regenerating agent.

The invention relates to the technical field of engineering plastic and in particular relates to a modified PET (Polyethylene Terephthalate) base material for a heater and a preparation method thereof. The modified PET base material for the heater is prepared from the following raw materials in parts by weight: 60 to 70 parts of PET, 12 to 16 parts of modified nano rectorite, 8 to 12 parts of polytetrafluoroethylene micro-powder, 4 to 6 parts of glass fibers, 3 to 6 parts of aluminum nitride, 15 to 18 parts of zinc oxide, 3 to 5 parts of nano silicon nitride, 2 to 4 parts of aluminum oxide, 0.5 to 1 part of talcum powder, 2 to 4 parts of dihydroxy polydimethyl siloxane, 2 to 4 parts of a calcium-zinc compound stabilizer, 1.5 to 2 parts of barium stearate, 0.3 to 0.5 part of an ultraviolet absorber, 0.5 to 1 part of an anti-ageing agent and 1 to 3 parts of a toughening agent; the preparation method of the modified PET base material for the heater comprises the main steps of premixing, extruding and granulating, and drying and molding; the modified PET base material for the heater, provided by the invention, not only has excellent thermal conductivity and excellent insulativity, but also has relatively good mechanical properties.

The invention discloses a plastic food box preparation method, and relates to the technical field of food packaging. Raw materials include, by weight, 56-65 parts of polypropylene, 32-45 parts of bagasse fibers, 5-12 parts of corn starch, 5-12 parts of nano-clay, 10-20 parts of calcium oxide, 12-25 parts of calcium carbonate and 12-25 parts of sodium hydrogen carbonate. The method includes the steps: A, grinding the bagasse fibers into powder; B, mixing the polypropylene, the bagasse powder, the corn starch and the nano-clay into mixed materials; C, placing the mixed materials, the calcium oxide, the calcium carbonate and the sodium hydrogen carbonate into a plastic extruding machine for plasticizing and mixing to obtain molten materials; D, filling carbon dioxide gas into the molten materials to obtain foaming materials; E, extruding the foaming materials from the plastic extruding machine, and pressing the foaming materials into a plate; F, performing heating and plastic molding. The plastic food box preparation method can solve the problem that an existing plastic food box cannot resist high temperature and is difficultly degraded.

Provided are a lead-free solder, a solder paste, and a semiconductor device, and more particularly, a lead-free solder that includes Cu in a range from about 0.1 wt % to about 0.8 wt %, Pd in a range from about 0.001 wt % to about 0.1 wt %, Al in a range from about 0.001 wt % to about 0.1 wt %, Si in a range from about 0.001 wt % to about 0.1 wt %, and Sn and inevitable impurities as remainder, a solder paste and a semiconductor device including the lead-free solder. The lead-free solder and the solder paste are environment-friendly and have a high high-temperature stability and high reliability.

The invention discloses a modified material on the surface of a high-temperature component and a preparation method of a cladding layer of the modified material. The modified material is composed of, by mole percent, 35-40% of Ti powder, 35-40% of Al powder, 6-15% of Hf powder, 4-8% of Ta powder and 3-7% of W powder. After the modified material on the surface of the high-temperature component is subjected to laser cladding, the cladding layer is good in surface macro appearance and has the characteristics of being small in structural grain, free of cracks, and high in bonding strength with a base material. The cladding layer has excellent performance under high-temperature conditions, the operating temperature of the high-temperature component can be greatly increased, working demands under high temperatures are met, and the cladding layer has extremely high academic value and extremely great industrial application potentiality.

The invention discloses a preparation method of compound modified asphalt and relates to the technical field of chemical engineering. The compound modified asphalt is prepared from, by weight, 90-110 parts of asphalt, 10 parts of SBS, 4-5 parts of rubber powder, 4-5 parts of furfural extract oil, 3-4 parts of activator and 3-4 parts of stabilizer. The compound modified asphalt is prepared from asphalt, SBS, rubber powder and furfural extract oil, and the ratio of all the components is optimized, so that the prepared compound modified asphalt is good in high-temperature stability, high in low-temperature anti-cracking performance, excellent in ageing resistance and long in service life. All technological parameters are optimized in the preparation process, production efficiency is improved, and the preparation period is shortened.

The invention belongs to the field of lead-free piezoelectric materials and particularly relates to a transition metal element-doped bismuth calcium niobate ceramic material and a preparation method thereof. The chemical components of the transition metal element-doped bismuth calcium niobate ceramic material conform to the chemical general formula: Cal-xAxBi2Nb2O9, wherein A is selected from transition metal element Fe, Mn or Co; and x is not less than 0.01 and not greater than 0.2. The preparation of the transition metal element-doped bismuth calcium niobate ceramic has the advantages of low cost and simple process and is suitable for large-batch industrial production. The piezoelectric performance of the transition metal element-doped bismuth calcium niobate ceramic is much higher than that of the undoped bismuth calcium niobate ceramic, and the transition metal element-doped bismuth calcium niobate ceramic can be widely applied to high-temperature fields such as aerospace and steelmaking.

The invention provides a waterproofing and low-voltage aluminum electrolytic capacitor working electrolyte and a preparation method and application thereof. The electrolyte includes a solute, a main solvent, an auxiliary solvent, a water repellent and other additives, and the water repellent is a mixture of ethylene glycol, lauryl phosphate and hexadecyl phosphate and is obtained by mixing the ethylene glycol, the lauryl phosphate and the hexadecyl phosphate with the ratio of 8:1:1 by the mass percent at the temperature of 100-120 DEG C. The electrolyte provided has good high-temperature stability, and the capacitor assembled by the electrolyte has a long service life at a high temperature, and can achieve a life of more than 20000h at a working voltage U<=100V under the temperature of 105DEG C.

The invention discloses a field limiting ring-negative bevel angle compound terminal structure. The central region of a chip is used as an active region, the peripheral region of the active region is used as a terminal region, an n-type FS layer is arranged below a common n<->substrate of the active region and the terminal region, and a p<+> anode region and an anode are arranged below the n-type FS layer. In the active region, a plurality of parallel units are arranged in a n<-> base region, each unit is internally provided with a wavy p base region adjacent to the n<-> base region, a p<+> base region is arranged above the p base region, a cathode n<+> emission region is arranged in the center of the p<+> base region, and a cathode is arranged above each n<+> emission region. A gate is arranged above the p<+> base region, and the whole gate surrounds the periphery of the encircled cathode n<+> emission region. In the n<-> substrate of the terminal region, at least one p-type filed limiting ring is arranged on the outer side of a main node, a negative bevel angle is arranged above the field limiting angle, and the slope is coated with a passivation layer. The field limiting ring-negative bevel angle compound terminal structure of the invention has better high-temperature stability.

The invention provides a sitagliptin phosphate pharmaceutical preparation and a preparation method thereof. The sitagliptin phosphate pharmaceutical preparation comprises the following components in percentage by weight: 20-40% of sitagliptin phosphate monohydrate, 50-70% of a filler, 1-5% of a disintegrating agent, 0.5-2% of a hydrophobic lubricant and 1-4% of a hydrophilic lubricant, wherein the disintegrating agent is selected from one of magnesium aluminum silicate, magnesium aluminum metasilicate and silicon dioxide. According to the sitagliptin phosphate pharmaceutical preparation disclosed by the invention, the problems of complex preparation process, poor material compressibility and poor raw material stability of the sitagliptin phosphate pharmaceutical preparation are solved, and the sitagliptin phosphate pharmaceutical preparation which is simple in preparation process, good in material compressibility, stable in raw material and high in release speed is obtained.

The invention discloses high-temperature-resistant shield tail sealing grease and a preparation method thereof. The problem that shield tail sealing grease is used at high temperature in the tunneling process of a shield tunneling machine is mainly solved, and the principle is that a high-temperature stabilizer is added into the shield tail sealing grease, and the shield tail grease can still keep the original stable state in the high-temperature construction process of the shield tunneling machine. The high-temperature-resistant shield tail sealing grease is prepared by uniformly kneading the following components in percentage by mass: 5%-20% of base oil, 4%-10% of a high-temperature stabilizer, 8%-35% of a tackifier, 1%-3% of an emulsifier, 0.5%-1% of a preservative, 2%-5% of a water absorbing material, 35%-55% of a powdery filler and 3.5%-5.5% of a structure forming agent. The prepared high-temperature-resistant shield tail sealing grease is high in adhesivity, high in pumpability and good in water-pressure-resistant sealing performance, and the shield tail sealing grease can still play a good sealing and lubricating role in the high-temperature tunneling process of a shield tunneling machine.