62results about How to "Guaranteed high temperature stability" patented technology

The invention relates to a high-elasticity asphalt modified composition, a modifier, modified asphalt, a modified asphalt mixture and a preparation method. The modified composition comprises 100 parts of a styrene-butadiene-styrene segmented copolymer, 20-40 parts of a tackifier, 20-40 parts of a softener, 3-8 parts of a warm mixing agent, 15-40 parts of a plasticizer and 2-6 parts of a stabilizer. The preparation method of the modifier comprises the following steps: (1) mixing the styrene-butadiene-styrene segmented copolymer, the tackifier and the warm mixing agent according to a formula to obtain a melt; and (2) mixing the softener, the plasticizer and the stabilizer with the melt, and then extruding, cooling and dicing. The modified asphalt is prepared by doping the modifier into matrix asphalt and uniformly mixing. The modified asphalt mixture is prepared by mixing the modified asphalt and a raw material of a mineral mixture. The modified asphalt provided by the invention has good high-temperature and low-temperature stabilities and anti-fatigue capacity, and the modified asphalt mixture is strong in construction workability and good in pavement performance.

The invention relates to a package structure of a high-temperature pressure sensor, comprising a silicon carbide sensitive chip, an aluminum nitride base, a stress buffer substrate, a high-temperature sealing glass, a lead post, a Kovar outer cover and a thermocouple, wherein the aluminum nitride base is There is a boss on the surface, a stress buffer substrate is placed on the boss, and a silicon carbide sensitive chip is placed on the stress buffer substrate; the periphery of the boss is a stress isolation groove, and there are two or more through holes on the periphery of the stress isolation groove. The column passes through the through hole and is sintered by high-temperature sealing glass to realize the fixed connection between the lead column and the aluminum nitride base. The thermocouple is installed on the lower surface of the aluminum nitride base, and the aluminum nitride base is placed on the Kovar housing through the positioning steps. In addition, the aluminum nitride base and the Kovar cover are sintered and connected through high-temperature sealing glass. The packaging structure is resistant to high temperature, effectively reduces the influence of process stress and high temperature thermal stress on the sensitive chip of the MEMS pressure sensor, and further improves the high temperature measurement accuracy of the sensor.

The invention discloses a preparation method of a high-temperature methanation catalyst applicable to preparation of methane by reacting CO and CO2 with hydrogen. A carrier of the catalyst is an MgO-Al2O3 spinel carrier or a multi-element inorganic oxide compound carrier which consists of MgO-Al2O3 spinel and TiO2; an active ingredient of the catalyst is Ni which exists in the catalyst in a form of nickel oxide; an auxiliary ingredient of the catalyst is La2O3 and/or CeO2; the active ingredient in the catalyst is added in two steps through a kneading method and a dipping method. The preparation method has the beneficial effects that one part of Ni is firstly added through the kneading method, so that the high-temperature stability of the catalyst can be guaranteed; the other part of Ni is loaded through the dipping method, so that the low-temperature high activity of the catalyst can be guaranteed; the catalyst is burned at the temperature of 480-600 DEG C to generate magnesia-alumina spinel, so that the energy consumption and the cost are reduced.

The invention provides a catalyst for catalyzing methane combustion and a preparation method thereof. The catalyst comprises a carrier, and an active component which is loaded on the carrier, wherein the active component is wrapped with a wrapping layer for providing oxygen vacancy. The catalyst further comprises a catalyst promotor which is a ceria-zirconia solid solution. According to the catalyst, the wrapping layer wraps the active component, so that oxygen molecule stored in the wrapping layer can be timely conveyed to the active component, so that the high-temperature stability of the active component of the catalyst is maintained; in addition, the catalyst further comprises the catalyst promotor which is the ceria-zirconia solid solution capable of generating more oxygen vacancies and timely effectively storing and discharging oxygen, so that the high-temperature stability of the active component of the catalyst is improved; in addition, the wrapping layer, the ceria-zirconia solid solution and the carrier are mutually dispersed and in contact, so that the mutual insulation effect is achieved, and the sintering of the carrier is inhibited, and as a result, the high-temperature thermal stability and the catalyzing activity of the catalyst can be improved.

The invention discloses a high-specific-surface-area vanadium-zinc-series modified denitration catalyst. The catalyst is characterized in that a carrier is TiO2, TiO2-SiO2 or one of polynary inorganic oxide complex species containing TiO2, wherein TiO2 is prepared by heating and modifying metatitanic acid by virtue of H2O2; the carrier of the catalyst is in a honeycomb ceramic form; active components of the carrier include V2O5, ZnO and WO3. The catalyst has the beneficial effects that a kneading-dipping combined method is utilized in a preparation process, and Zn is added into the catalyst step-by-step, so that synergistic effects of V and Zn as well as W and Zn are exerted, and the low-temperature activity and high-temperature stability of the catalyst are guaranteed; by carrying out chemical processes of complexing and dispersing ions of the metatitanic acid and H2O2, the specific surface area and uniformity of the metatitanic acid are improved, and a next forming step is benefited; meanwhile, as the frequently-used industrial titanium dioxide is evaded, the cost is lowered.

The invention discloses a neodymium iron boron material and a preparation method and application thereof, the neodymium iron boron material comprises R, Cu, Al, Fe and B, and also comprises one or more of Ti, Zr and Nb, the content of R is 28.5-33.2% by weight, the content of Zr is 23.5-33.2% by weight, and the content of Nb is 23.5-33.2% by weight. The content of Cu is more than 0.393%; the content of B is 0.84 to 0.945 percent; wherein the content of Al is less than 0.08%; the R-T-B series permanent magnet material does not contain Co; the R-T-B series permanent magnet material comprises anR2Fe14B main phase, a grain boundary phase and a rare earth-rich phase. The grain boundary phase comprises R < 6 > Fe < 13 > Cu; and the volume fraction of R6Fe13Cu is greater than or equal to 3.5%. The neodymium iron boron material is high in coercive force Hcj and Br, good in magnet temperature stability and excellent in performance; and the demagnetization curve has no step, the relative permeability is low, and the uniformity of the magnetic steel is good.

The invention discloses a high-temperature alloy with a gradient nanostructure surface layer and a preparation method of the high-temperature alloy, and belongs to the technical field of metal material surface nanocrystallization. The high-temperature alloy is treated through surface mechanical grinding technology, a spherical head is pressed into the surface of a material by a certain depth for grinding, gradient plastic deformation is generated on the surface layer of the material, a gradient organization structure for transition from nano-crystalline grains to micron-crystalline grains is formed on the surface of the high-temperature alloy, and a large hardness gradient is generated from outside to inside, so that the problems of coarse surface grains, uneven microstructure, insufficient mechanical properties and the like of the high-temperature alloy are solved. The high-temperature alloy with the gradient nanostructure surface layer and the preparation method of the high-temperature alloy have the characteristics of being simple in treatment, low in energy consumption, and suitable for industrial application.

The invention discloses special casting materials for triangular area prefabricated components of an electric arc furnace roof. The special casting materials are prepared from the following raw materials: 20-35 parts of highly pure aluminum bauxite, 10-25 parts of tabular corundum, 15-32 parts of chromium corundum, 3-5 parts of spinel fine powder, 1.5-2.5 parts of kyanite, 5-9 parts of active aluminum oxide micro powder, 1-3 parts of chromium oxide green fine powder, 2-4 parts of silicon micro powder, 3.11-5.25 parts of a bonding agent, 0.03-0.06 part of organic fibers and 0.5-1 part of stainless steel fibers. According to the special casting materials disclosed by the invention, scientific grain size distribution is adopted for main body granules, so that the triangular area prefabricatedcomponents are guaranteed to have good high temperature strength and good hot vibration stability; materials of the spinel micro powder, pure calcium aluminate cement, active aluminum oxide and chromium oxide green and the like, which are added, are compounded, and after casting moulding and baking, a high-strength low-temperature solidified combination liner is formed, so that the compactabilityand the volume stability of the prefabricated components are guaranteed; the chromium corundum (Al2O3+Cr2O3 greater than or equal to 95%) in the raw materials is slag for smelting electrofusion chromium metal; through the use of the raw materials, the cost of products can be reduced, discharge of industrial waste can be reduced, and cyclic utilization of the industrial waste can be effectively realized.

The invention discloses a rapid preparation method and a product of a uranium dioxide/nano-diamond nuclear fuel pellet, and belongs to the field of energy and composite materials, particularly belongsto the field of powder metallurgy, and aims to solve the problems that safety requirements of a nuclear power station are difficultly met as heat conductivity of an existing ceramic uranium dioxide (UO2) pellet is poor. According to the method, the uranium dioxide/nano-diamond nuclear fuel pellet with a three-dimensional network structure is prepared by a powder metallurgy technique, the heat conductivity of uranium dioxide nuclear fuel is improved, high-temperature stability and radiation stability of the fuel pellet are improved, the method can effectively solves the problems, safety of theuranium dioxide nuclear fuel pellet is greatly improved, industrial large-scale production application requirements can be met, the method has high application value and good application prospect andis worthy of large-scale popularization and application.

The invention discloses a manufacturing method for a Li-B base air suction material. According to the manufacturing method, by mass, 30-70 % of Li, 20-50 % of B, 0.3-6 % of Mg and/or Al and 0.01-18% of C are heated to 350-370 DEG C, heat preservation is conducted, the components are stirred evenly and cooled along with a furnace, and Li-B base prealloy is obtained; the Li-B pre-alloy is processed into the shape needed by an air suction component at the room temperature in air with relative humidity lower than or equal to 2 %, the Li-B prealloy is heated to 600-700 DEG C in protective atmosphere, heat preservation is conducted on the Li-B alloy for 5-30 minutes and a finished product is obtained. The manufacturing method for the Li-B base air suction material not only solves the problem that Li-B alloy meeting the air suction material standard cannot be manufactured through a one-step synthesis method in the prior art and the problem that Li-B alloy air suction pieces cannot be manufactured through the powder process pressing method, but also reduces the difficulty of controlling the structure of the Li-B base air suction material, and improves the uniformity of the structure of the material; meanwhile, the spontaneous combustion phenomenon is successfully avoided, and the surface passivation of the Li-B base air suction material is achieved. The manufacturing method for the Li-B base air suction material is simple in preparation technology and can be produced in an industrialized mode conveniently.

The invention discloses a rare earth permanent magnet material and a preparation method and application thereof. The rare earth permanent magnet material comprises R, Ga, Al, Fe and B, and further comprises one or more of Ti, Zr and Nb, and the rare earth permanent magnet material comprises the following components in percentage by weight: 28.5%-33.05% of R, 2.05%-3.05% of Ga, 2.05%-3.05% of Al, 2.05%-3.05% of Fe and 2.05%-3.05% of Nb. The content of Ga is greater than 0.35%; the content of B is 0.84 to 0.945 percent; wherein the content of Al is less than 0.08%; the R-T-B series permanent magnet material does not contain Co. The rare earth permanent magnet material is high in coercive force Hcj and Br, good in magnet temperature stability and excellent in performance; and the demagnetization curve has no step, the relative permeability is low, and the uniformity of the magnetic steel is good.

The invention discloses an R-T-B series permanent magnet material and a preparation method and application thereof. The R-T-B series permanent magnet material comprises R, Ga, Cu, Al, Fe and B, and further comprises one or more of Ti, Zr and Nb, and the content of R is 28.5-33.03% in percentage by weight; contents of the R-T-B series permanent magnet material are as follows: the content of Ga is 0.35% or more, the content of Cu is 0.4% or above, the content of B is 0.84-0.945%,, the content of Al is less than 0.08%, and the R-T-B series permanent magnet material does not contain Co. The R-T-Bseries permanent magnet material is high in coercive force Hcj and Br, good in magnet temperature stability and excellent in performance; and the demagnetization curve of the R-T-B series permanent magnet material has no step, the relative permeability is low, and the uniformity of the magnetic steel is good.

Disclosed are a solid cosmetic composition having improved high-temperature stability and feeling of use, and a method for preparing the same. According to the solid cosmetic composition having improved high-temperature stability and feeling of use and the method for preparing the same of the present invention, it is possible to provide a solid cosmetic composition having improved high-temperature stability and feeling of use, which can maintain the structure of the contents and ensure high-temperature stability even at a high temperature of about 50 DEG C by increasing the melting point of the cosmetic, and which not only can withstand thermal stress at a high temperature, but also can provide a solid cosmetic composition having improved high-temperature stability and feeling of use. And the cosmetic can bear physical stress caused by external force. Moreover, even when applied to a grinding container, the cosmetic can be normally cut and discharged by a rotary cutting blade at a high temperature, has improved hardness, and can be lightly applied without feeling heavy when used. In addition, a thin and soft feeling of use is provided, so that a natural skin expression, which is a recent makeup trend, can be achieved, and this makes it possible to form hardness in a small amount instead of a conventional structuring agent comprising only waxes, thereby improving the degree of freedom in the design of cosmetic components.

The invention relates to an intelligent surgery laser knife comprising a laser emitter, a laser controller, a self-focusing lens, an optical fiber connector, an optical fiber, a coupler and a scalpel body. Laser beams output by the laser emitter are converged at a point via the self-focusing lens, and then enter the optical fiber via the optical fiber connector, then are coupled by the coupler via the optical fiber; then laser energy is transmitted to a laser knife pen; the laser controller comprises a microprocessing chip, a high-temperature temperature sensor, an analog-digital conversion circuit, a laser pulse width modulation circuit and a laser pulse peak value modulation circuit; the microprocessing chip comprises a temperature determining unit, a pulse width calculation unit, a pulse peak calculation unit, a pulse width control unit and a pulse peak control unit. The intelligent surgery laser knife has great reliability; and laser can be automatically adjusted via the laser knife, so high temperature stability produced by the laser knife can be effectively maintained.

The invention discloses ultra-supercritical thermal power generating unit steel excellent in steam corrosion oxidization resistance and high-temperature endurance property and a preparing method thereof. The steel comprises, by mass percent, 0.08 to 0.15% of C, 0.2 to 1.0% of Si, 0.2 to 0.8% of Mn, not larger than 0.02% of P, not larger than 0.01% of S, 9.0 to 13% of Cr, 0.2 to 0.8% of Mo, 0.05 to0.32% of V, 0.02 to 0.1% of Nb, 0.002 to 0.008% of B, 0.005 to 0.3% of Al, 0.01 to 0.05% of N, not larger than 0.05% of residual elements of Ni+Zr+Pb+Sn+As, and the balance Fe and inevitable impurities. (Cr+1.5Mo+1.5Si+2Nb+2V)/(0.3Mn+30C+20N) is larger than or equal to 2.3 and smaller than or equal to 4.5, the extrapolated 100-thousand-hour endurance strength of the steel at the temperature of 620 to 650 DEG C is larger than or equal to 60 MPa, weight increment of 2000-hour oxidation corrosion at the temperature of 625 DEG C is smaller than or equal to 20 mg/cm<2>, the coefficient of thermalexpansion is 9 to 15*10<-6>K, and the steel is particularly suitable for large-scale producing of boiler tubes of an ultra-supercritical thermal power generating unit of 620 to 650 DEG C or other heat-resisting devices.