14results about How to "Guaranteed high temperature stability" patented technology

The invention discloses a technological method for refining oxygen-free copper plate crystal grains. The technological method comprises the following steps that an electrolytic copper plate is placed in a furnace bin to be melted, the surface of the electrolytic copper plate is covered with charcoal, semi-continuous casting billet drawing is carried out, and an oxygen-free copper cast ingot is produced; the oxygen-free copper casting blank is put into a heat preservation furnace to be preheated, the preheating temperature ranges from 800 DEG C to 900 DEG C, and the heat preservation time ranges from 2 hours to 3 hours; the preheated cast ingot is subjected to upsetting and drawing, the upsetting deformation is 50%-60%, the cast ingot is drawn to 150%-160% of the original cast ingot, and the upsetting and drawing times are 3-4 times; warm forging and square drawing are started, the warm forging temperature ranges from 700 DEG C to 750 DEG C, the cast ingot is upset to 50%-60% of the original length, square drawing is conducted to the needed blank length, and the final forging temperature is kept to be larger than or equal to 700 DEG C; the blank is cooled to the room temperature, cold forging is started, multiple passes of cold forging are conducted, the rolling reduction of each pass is 10%-15%, and the final cold forging deformation is 30%-60%; and the oxygen-free copper blank obtained after cold forging is subjected to aging heat treatment, the aging heat treatment temperature ranges from 350 DEG C to 450 DEG C, the aging heat treatment time ranges from 1 h to 2 h, air cooling is conducted after annealing, and the oxygen-free copper plate is obtained.

The invention provides an anti-degradation automobile exhaust purification three-way catalyst and a preparation method thereof.The three-way catalyst comprises a carrier and a coating coated on the carrier, and the coating comprises a lower coating, a middle coating and an upper coating which are sequentially arranged on the carrier from bottom to top; the lower coating comprises a magnesium-aluminum composite oxide, a first cerium-zirconium composite oxide and precious metal Pd, the middle coating comprises a lanthanum-aluminum composite oxide, a second cerium-zirconium composite oxide and precious metal Rh, and the upper coating is a lanthanum coating formed by dipping a lanthanum salt solution. According to the catalyst disclosed by the invention, the noble metal Pd and the MgO-Al2O3 material are combined, so that the Pd is effectively anchored on the carrier more stably under a high-temperature condition, the Pd is distributed more uniformly, the ignition of the catalyst can be effectively accelerated, and meanwhile, the high-temperature stability of the catalyst is ensured; the outermost layer of the catalyst is impregnated with lanthanum salt to adjust multi-layer distribution control of La in the catalyst, and the anti-sintering performance of the catalyst is further improved.

The invention discloses an underground continuous oil pipe heating assembly for oil extraction, and relates to the technical field of oil pipe steam heating. An inseparable first hose body is connected to the outer side of a continuous oil pipe body side by side, and a separable second hose body is connected to the tail end of the first hose body; the tail end of the second hose body floats upwards through the columnar air bag, so that after the device is lowered to an underground oil layer, the tail end of the first channel can float upwards to the position above the crude oil level in the underground oil layer, and high-temperature steam can be conveyed from bottom to top through the first channel in cooperation with the operation that a large amount of high-pressure and high-temperature steam is injected into the underground oil layer during SAGD oil extraction; the continuous oil pipe body is heated from bottom to top by means of high-temperature steam, a large number of evenly-distributed electric heating assemblies do not need to be used, installation and use are convenient and fast, and the heating cost during continuous oil pipe oil extraction can be effectively reduced.

The present invention belongs to the technical field of mechanical processing tools, and specifically relates to a high-temperature wear-resistant coating tool and a preparation method thereof. The high-temperature wear-resistant coating tool prepared by a high-power pulsed magnetron sputtering process includes, from the substrate to the outside, an M bonding layer, an MN transition layer deposited on the surface of the M bonding layer, an NbN / CrB2 functional layer deposited on the surface of the MN transition layer, and a NbN coating deposited on the surface of the NbN / CrB2 functional layer; wherein the face-centered cubic structure MN in the high-temperature wear-resistant coating has excellent bonding strength to NbN, and in addition, the thickness of the NbN / CrB2 coating in the NbN / CrB2 functional layer presents a gradient trend, which can achieve the effect of reducing internal stress and preventing peeling. The coating prepared by the present invention not only has high-temperature stability and wear resistance, but also has high bonding strength and anti-stickiness, thereby solving the problem of easy wear and built-up edge when PVD coated tools cut high-temperature alloy materials, and the composite coating tool preparation process is simple, easy to operate, and suitable for industrial production.

The invention discloses a diaphragm as well as a preparation method and application thereof, and belongs to the technical field of battery diaphragms. The diaphragm comprises an aramid fiber base membrane and a thermoplastic polyimide layer which is polymerized on at least one side surface of the aramid fiber base membrane in situ; the thermoplastic polyimide layer is formed by imidization of thermoplastic polyamide acid; the thermoplastic polyamide acid is formed by polymerizing a diamine monomer and aliphatic dicarboxylic anhydride; and the difference between the glass transition temperature of the thermoplastic polyimide layer and the glass transition temperature of the aramid fiber base film does not exceed 80 DEG C. The diaphragm has relatively good strength, thermal stability and the like. The preparation method of the diaphragm comprises the following steps: coating at least one side surface of the aramid base membrane with a thermoplastic polyamide acid solution prepared from a diamine monomer and aliphatic dicarboxylic anhydride, preparing a thermoplastic polyamide acid gel layer from the thermoplastic polyamide acid solution coating layer, and carrying out imidization reaction to obtain the diaphragm. The method is simple to operate and easy for industrial production. The diaphragm can be used for preparing a battery with good performance.

The invention belongs to the technical field of petrochemical engineering, and particularly relates to composite modified hydraulic asphalt and a preparation method thereof. The hydraulic asphalt is prepared from the following components in parts by mass: 100 parts of petroleum asphalt, 5 to 10 parts of SBS modifier, 15 to 25 parts of rubber modifier, 15 to 25 parts of cosolvent and 0.1 to 0.3 part of stabilizer. According to the invention, a scheme of compounding two types of modifiers, namely the rubber powder and the SBS, is adopted, the product process is simple, the structure is stable, and the composite modified hydraulic asphalt disclosed by the invention has a specific three-dimensional elastic net-shaped structure through specific stabilizer composition and a mass ratio of a styrene chain segment to a butadiene chain segment in the SBS modifier; and the adhesive can meet the requirements of special environments, and is relatively high in viscosity. The production is simple, the high-low temperature performance is excellent, the quality of the hydraulic asphalt is improved, and the application performance of the hydraulic asphalt in a special environment is ensured.

The application discloses a preparation method and application of low-carbon magnesite-carbon brick, relates to the technical field of low-carbon magnesite-carbon brick preparation, and comprises the following component materials: 69-73 parts of fused magnesite, 3-7 parts of zirconia, 3.5-7.5 parts of graphite powder, 2.8-3.4 parts of phenolic resin, 2.5-4 parts of a functional additive and 1-2 parts of nanometer materials; the nanometer materials can be added to enhance the strength and toughness of the matrix, can also fill the pores of the fused magnesite and the zirconia, realize the close packing of particles, and reduce the apparent porosity of the material; the zirconia can be added to provide a solid, stable and non-shrinking skeleton support for the brick body, and guarantee the high-temperature stability; the functional additive can be added to optimize the phase composition under high temperature, enhance the thermal shock resistance and wear resistance of the brick body, and ensure that the low-carbon magnesite-carbon brick can still maintain good structural integrity and use reliability under high temperature and complex working conditions.

The invention discloses weighted high-temperature-resistant and high-salt-resistant gel as well as a preparation method and application thereof, and belongs to the technical field of temporary plugging gel for oil and gas fields. The invention relates to a high-temperature-resistant composite material which comprises the following raw materials: an ethyl acrylate-vinyl acetate copolymer or a methyl methacrylate-vinyl acetate copolymer, naphthalene-1, 4, 5-triol, a reinforced cross-linking agent, a composite salt weighting agent, modified polyvinyl alcohol fibers, an antioxidant, a synergistic antioxidant and water. The preparation method comprises the following steps: firstly, dispersing the ethyl acrylate-vinyl acetate copolymer or methyl methacrylate-vinyl acetate copolymer in water, then adding the composite salt weighting agent, the antioxidant, the synergistic antioxidant, the modified polyvinyl alcohol fiber, naphthalene-1, 4, 5-triol and other raw materials, and uniformly stirring to obtain a mixture; and reacting for 2-4 hours under the condition of 35-50 DEG C to obtain the product. The gel has relatively high density and excellent high temperature resistance and salt resistance, and is stable in plugging effect when being applied to temporary plugging or isolation leakage layers.

The invention relates to a transmission electron microscope high-resolution in-situ dual-temperature-zone chip and a preparation method thereof. The transmission electron microscope high-resolution in-situ dual-temperature-zone chip comprises an upper chip and a lower chip, the upper chip and the lower chip are connected through a gasket to form a gas flow channel; a sample groove structure is arranged on the surface of the lower chip; the lower chip comprises two independently controlled heating areas, namely a high-temperature area and a low-temperature area, the high-temperature area is used for evaporating a solid precursor, the low-temperature area is used for observing material deposition and reaction, and a controllable temperature gradient is formed between the high-temperature area and the low-temperature area. According to the invention, a real CVD temperature gradient is simulated in a TEM cavity through double-temperature-zone layout and independent temperature control, so that in-situ observation of gas-solid reaction under an atomic scale is realized; the shallow slot design prolongs the reaction time and improves the experiment reliability; the heater ensures high-temperature stability; the chip provides an advanced experimental platform for CVD mechanism research and process optimization.

The invention discloses a rubber material for improving the grip performance of tires by changing the type of resin, and relates to the technical field of tire rubber materials. The invention utilizes 2,2'-[[2-(allyloxy)-1,3-phenylene]bis(methylene)]bis(ethylene oxide), ethylene(chloromethyl)dimethoxysilane, and high specific surface area porous silica modified polyetheramine to change the type of resin so that it has both anti-slip and puncture resistance characteristics, which is beneficial to improving the performance of tire rubber materials. On this basis, natural rubber and oil-extended styrene-butadiene rubber are used as raw materials, and are respectively mixed with epoxy resin and isocyanate. Through the combination of rubber and resin, the strength of the formula can be improved, and the tire can be more gripped. In addition, the epoxy resin and isocyanate can be cross-linked with the modified resin, and a new cross-linking network is introduced to improve the modulus and strength of the prepared tire rubber material, and improve the puncture resistance and gripping ability.

The application discloses high-elasticity modified asphalt, modified asphalt mixture, and a preparation method and application thereof. The high-elasticity modified asphalt comprises the following components in parts by weight: 70-88 parts of base asphalt, 10-16 parts of SBS, 2-4 parts of butyronitrile rubber, 8-16 parts of naphthenic oil, 1-3 parts of RET modifier, and 0.3-0.6 parts of anti-stripping agent. The modified asphalt mixture prepared from the high-elasticity modified asphalt has good fatigue resistance and deformation following capacity, and is suitable for steel bridge deck pavement.

The invention relates to the field of petrochemical engineering, in particular to hydraulic asphalt and a preparation method thereof. According to the hydraulic asphalt provided by the invention, the petroleum asphalt, the SBS modifier, the SBR modifier, the ductility enhancer and the stabilizer are matched according to a certain proportion. The preparation method comprises the following steps: mixing an SBR modifier and a ductility enhancer, and carrying out certain treatment to prepare an SBR mother solution; the method comprises the following steps: preheating petroleum asphalt, mixing the preheated petroleum asphalt with an SBS modifier, heating, stirring for swelling, and shearing to obtain a shearing liquid; and mixing the shearing liquid with the SBR mother liquid, and performing certain treatment to obtain the hydraulic asphalt. The specific raw materials are matched according to a certain proportion, and the specific steps, the preparation sequence and certain process conditions are controlled in the preparation process, so that an asphalt product also has excellent low-temperature performance on the premise of ensuring high-temperature stability. Meanwhile, the viscosity is relatively low, so that the problems of high viscosity and high energy consumption in the production and use process of the hydraulic asphalt are solved.

The invention discloses a sizing material capable of changing resin types and improving the gripping performance of a tire, and relates to the technical field of tire sizing materials. According to the invention, 2, 2 '-[[2-(allyloxy)-1, 3-phenylene] di (methylene)] di (ethylene oxide), ethylene (chloromethyl) dimethoxysilane and porous silicon dioxide with high specific surface area are utilized to modify polyether amine, and the type of resin is changed, so that the resin has the characteristics of wet skid resistance and puncture resistance, the performance of a tire rubber material is improved, and on this basis, the service life of the tire rubber material is prolonged. The natural rubber and the oil-extended styrene-butadiene rubber are used as raw materials and are respectively mixed with the epoxy resin and the isocyanate, through the matching of the rubber and the resin, the strength of a formula can be improved, a tire is more grabbed, the epoxy resin and the isocyanate can be cross-linked with the modified resin, a new cross-linked network is introduced, the modulus and the strength of the prepared tire rubber material are improved, and the service life of the tire rubber material is prolonged. And the pricking resistance and the road holding capacity are improved.

The present invention discloses a high temperature resistant thin film sensor integrating temperature, strain and heat flow testing functions and a preparation method thereof. The high temperature resistant thin film sensor comprises a substrate and a high temperature glue layer, a Ta2O5 thin film layer and a SiO2 thin film layer arranged on its surface, as well as a first thin film thermocouple, a thermocouple stack and a strain sensitive grid, and the surface is covered with a protective layer. The preparation method thereof comprises: preparing the above-mentioned thin film layers on the surface of the substrate. Compared with conventional high temperature resistant thin film sensors, the high temperature resistant thin film sensor of the present invention has more excellent high temperature resistance and structural stability, longer service life, higher measurement accuracy, and can be used to measure the working parameters (such as temperature, strain, heat flow, etc.) of turbine blades at high working temperature and high speed at the same time. It has high use value and good application prospects. The preparation method thereof has the advantages of simple process, convenient operation, low preparation cost, high yield rate, etc., is suitable for large-scale preparation, and is conducive to industrial application.