431results about How to "Raise room temperature" patented technology

The present invention provides methods for lathing at room temperature a silicone hydrogel material, in particular silicone hydrogel material having a high oxygen permeability and made of a polymerizable composition containing a relative large amount of oxyperm component, into contact lenses.

The present invention provides a coating inorganic fiber toughened MAX phase ceramic composite material and a preparation method thereof. The composite material adopts a MAX phase ceramic material as a matrix and adopts coating inorganic fibers as a toughening phase, wherein the coating inorganic fiber content is 0.5-90% (by volume), and the coating inorganic fibers are completely dispersed in the matrix and are inorganic fibers with the surface coated with the coating. Compared with the composite material in the prior art, the composite material of the present invention has the following characteristics that: the interface reaction between the inorganic fibers and the MAX phase ceramic can be effectively inhibited, the thermal expansion coefficient and elasticity modulus matching degree between the inorganic fibers and the MAX phase ceramic can be effective regulated, the effective improvement of the fracture toughness and the high temperature resistance of the MAX phase ceramic composite material can be achieved, the problems of high brittleness and insufficient use reliability of the MAX phase ceramic can be fundamentally solved, and the coating inorganic fiber toughened MAX phase ceramic composite material has potential application prospects in the high technology fields of civil use, aviation, aerospace, nuclear industry and the like, and is especially for the fission and fusion reactor nuclear power plant inner wall structure material.

This invention is a high-intensive heat-fast magnesium alloy and its preparation method, and the magnesium alloy has the following components with their weight percentages: 6-15%Gd, 1-6%Y, 0.35-0.8%Zr, 0-1.5%Ca, and impurity elements Si, Fe, Cu and Ni with their gross less than 0.02%, and the rest percentage is Mg. while melting, add Gd, Y, Zr in the Mg melt in Mg-Gd, Mg-Y, Mg-Zr forms, then carry out solution treatment to the magnesium alloy under 450-500deg.C for 6-12 hours, squeeze in in 350-450deg.C, treat in time the squeezing stick for 10-16 hours in 225deg.C to improve its strength.

A lithium ion-conducting compound, having a garnet-like crystal structure, and having the general formula: Li_n[A_{(3-a′-a″)}A′_(a′)A″_(a″)][B_{(2-b′-b″)}B′_(b′)B″_(b″)][C′_(c′)C″_(c″)]O₁₂, where A, A′, A″ stand for a dodecahedral position of the crystal structure, where A stands for La, Y, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and/or Yb, A′ stands for Ca, Sr and/or Ba, A″ stands for Na and/or K, 0<a′<2 and 0<a″<1, where B, B′, B″ stand for an octahedral position of the crystal structure, where B stands for Zr, Hf and/or Sn, B′ stands for Ta, Nb, Sb and/or Bi, B″ stands for at least one element selected from the group including Te, W and Mo, 0<b′<2 and 0<b″<2, where C and C″ stand for a tetrahedral position of the crystal structure, where C stands for Al and Ga, C″ stands for Si and/or Ge, 0<c′<0.5 and 0<c″<0.4, and where n=7+a′+2·a″−b′−2·b″−3·c′−4·c″ and 5.5<n<6.875.

The invention relates to a method for preparing a high-nickel long-cycle single-crystal nickel-cobalt-manganese (NCM) lithium ion battery positive-pole material. The preparation method comprises the following steps: (1) mixing a soluble nickel salt, a cobalt salt, a manganese salt, an alkali metal hydroxide and ammonia water, and enabling the mixture to flow into a reaction kettle for constant-temperature coprecipitation to obtain a high-nickel NCM ternary precursor material; (2) uniformly mixing the high-nickel NCM ternary precursor, lithium hydroxide and an additive A in a wet high-speed mixing mode, carrying out drying, then carrying out primary sintering in an oxygen-enriched atmosphere to obtain a spherical high-nickel NCM ternary positive-pole material; (3) carrying out crushing, smashing and sieving to obtain a high-nickel NCM ternary positive-pole material; and (4) carrying out wet mixing and drying on the high-nickel NCM ternary positive-pole material with a coating agent B, carrying out secondary sintering in an oxygen-enriched atmosphere, and carrying out crushing, smashing and sieving to obtain the high-nickel single-crystal NCM lithium ion battery positive-pole material. The positive-pole material prepared by the method has the advantages of high capacity, good cycle performance, high compaction density and the like.

A bond layer for use on a silicon based substrate. The bond layer comprises an alloy comprising a refractory metal disilicide/silicon eutectic. The refractory metal disilicide is selected from the group consisting of disilicides of molybdenum, chromium, hafnium, niobium, tantalum, rhenium, titanium, tungsten, uranium, vanadium, yttrium and mixtures thereof. The refractory metal disilicide/silicon eutectic has a melting point of greater than 1300° C.

The invention discloses a high-strength silicon carbide ceramic pipe and manufacturing method thereof, and belongs to the technical field of engineering ceramic materials. Silicon carbide ceramic powders with different granularities are used as the main raw materials, graphite powder and carbon black are used as binders, and resin is used as a binder. The materials are uniformly mixed by a spray granulation process; an organic plasticizer of cellulose and a lubrication agent are added into the mixture; and vacuum pugging, decaying and extrusion molding are conducted to obtain a pipe base substrate; and the base substrate is subjected to drying solidification, high temperature sintering reaction, sandblast and heat treatment to obtain the high strength silicon carbide ceramic pipe. The pipe biscuit manufactured by the process has high strength and length of more than 4000mm; after sintering, the pipe has strength of 300MPa or more, and has the advantages of moderate density, high thermal conductivity, high fracture toughness, good thermal shock resistance and low cost, and can be widely applied to chemical and metallurgy fields, such as acid and alkaline corrosion and high temperature erosion.

The invention relates to a heat-resistant cast aluminum alloy and an extrusion casting method thereof, and belongs to the fields of metallic materials and metallurgy. The alloy consists of the following elements in percentage by weight: Si, Cu, Ni, Mg, Ti, RE, Mn, Fe and Al. The heat-resistant cast aluminum alloy is prepared by virtue of extrusion casting, and after performing solution treatment and artificial aging treatment on the alloy, the room temperature tensile strength sigma b of the alloy is more than or equal to 420MPa, the tensile strength sigma b at 300 DEG C is more than or equal to 220MPa, the tensile strength sigma b at 350 DEG C is more than or equal to 140MPa, the room temperature extensibility delta is more than or equal to 2.5%, the extensibility delta at 300 DEG C is more than or equal to 6.5%, and the extensibility delta at 350 DEG C is more than or equal to 14.5%. According to the alloy and the extrusion casting method thereof provided by the invention, the casting performance is improved, the room-temperature and high-temperature mechanical properties of the alloy are greatly improved, and the application range of Al-Si series cast aluminum alloys is expanded.

A method for fabricating a single-electron transistor (SET). A one dimensional channel is formed between source and drain on a silicon-on-insulator substrate, and the separated polysilicon sidewall spacer gates are formed by electron-beam lithographically etching process in a self-aligned manner. Operation of the single-electron transistor with self-aligned polysilicon sidewall spacer gates is achieved by applying external bias to the self-aligned polysilicon sidewall spacer gates to form two potential barriers and a quantum dot capable of storage charges between the two potential barriers. A metal upper gate is finally formed and biased to induce a two-dimensional electron gas (2DEG) and control the energy level of the quantum well. Accordingly, the method of the invention comprises a combination of electron beam (E-beam) lithography with multilayer-aligned direct writing technology, oxidation, and wet etching to form a nanoscale one-dimensional channel between source and drain on a silicon-on-insulator substrate.

The invention discloses a positive pole piece which comprises a positive pole current collector and a positive pole diaphragm arranged on at least one surface of the positive pole current collector, and the positive pole diaphragm comprises a positive pole active substance; the positive electrode active substance comprises at least two lithium nickel cobalt manganese oxides LiNixCoyMn1-x-yO2 withdifferent morphologies and average particle sizes D50, wherein one type is primary particle single crystal LiNixCoyMn1-x-yO2, and the other type is secondary particle polycrystalline LiNixCoyMn1-x-yO2; the weight ratio [omega] of the single crystal to the polycrystalline LiNixCoyMn1-x-yO2 satisfies the relational expression: 0.1<=[omega]<=9. By adjusting the ratio of the primary particle single crystal to the secondary particle polycrystalline material and the nickel content, the positive pole piece can have better thermal stability and excellent dynamic performance, so that the lithium ion secondary battery based on the positive pole piece has the characteristics of long cycle life at normal temperature and high temperature.

The invention discloses method of preparing a refractory castable used for large blast furnace iron runners, and the refractory castable has the advantages of green environmental protection, energy saving and emission reduction, good construction performance, high strength, high temperature volume stability, thermal shock stability and slag corrosion resistance. The method adopts Shanxi high-quality high bauxite (Al2O3 is greater than equal to 88%), fused brown corundum, fused white corundum and 97 silicon carbide as main raw materials, and high bauxite and fused brown corundum are composed ofcertain particles, fused white corundum powder, calcined alumina powder, 95 silicon micropowder, spherical asphalt, metal silicon powder and pure calcium aluminate cement are composition of a matrix,and an appropriate amount of an anti-explosive agent and a high-efficiency dispersant are added for the preparation. The calcined alumina powder used in the long-life environment-friendly tapping trench castable prepared by the method of the invention has uniform microstructure, high fineness, good sinterability and fluidity, and reacts with silicon oxide to form a high-temperature phase of mullite at high temperature, which improves the internal microstructure of the material and improves the thermal shock stability of the material.

The invention belongs to the technical field of blending processing of copolymers and discloses a blended material of an ethylene-vinyl alcohol copolymer and high-density polyethylene. The blended material comprises the following components in percentage by weight: 50.0 to 80.1 percent of ethylene-vinyl alcohol copolymers, 10.0 to 30.0 percent of high-density polyethylene, 5.0 to 15.0 percent of flexibilizer, 4.8 to 15 percent of compatilizer, and 0.1 to 1.0 percent of antioxidant. The invention also discloses a method for preparing the blended material. The blended material has high gas resisting property of EVOH as well as high moisture resisting property of HDPE; the product cost is effectively lowered; the EVOH/HDPE blended material is good in toughness, the normal-temperature and the low-temperature impact strengths of the EVOH/HDPE blended material are obviously higher than those of the EVOH, and the application range of EVOH is widened.

The invention relates to a multiphase ceramic hybrid composite reinforced metal matrix composite material and a preparation process thereof, a substrate of the material is aluminum and an alloy thereof and magnesium and the alloy thereof, the hybrid reinforced phase is in-situ TiC and TiB2 and SiC particles added through the vacuum stirring and casting method, the weight percent of the reinforced phase of TiC and TiB2 particles is 4-20% by weight respectively, and the volume percent of SiC particles is 4-25% by volume. The preparation process comprises the following steps: firstly melting a substrate, and carrying out fining, fluxing, refining and degassing on the substrate; introducing argon for protection, then carrying out in-situ reaction and the vacuum stirring and casting composite process, further carrying out vacuum refining and degassing treatment, unloading vacuum, skimming dross and oxide inclusion, standing, and then carrying out casting, thereby preparing the high-performance multiphase ceramic hybrid composite reinforced (TiC+TiB2+SiC)/M(M=Al and the alloy thereof, Mg and the alloy thereof) metal matrix composite material. The preparation process can fully play the complementary role of multiphase hybrid reinforcement and the advantages thereof, thereby significantly improving various performances of the composite material; and the process is simple and easy to realize mass production.

The invention provides electrolyte solution, which contains an organic solvent, a lithium salt or lithium oxide, a compound containing an electron-withdrawing group and an additive, wherein the solvent is a carbonic ester and/or ether solvent; and the additive is a compound having a molecular formula of RBC2O4Li, R in the formula may be -C2O4, -F2, -C6H2O2, alkyl or fluorine-containing substitutedalkyl, and the concentration of the additive in the electrolyte solution is 0.005 to 0.1mol/l. The invention also provides a preparation method of the electrolyte solution. The invention also provides a lithium cell, which comprises a lithium cell diaphragm soaked in the electrolyte solution. The electrolyte solution of the invention has the advantages of high transport number of lithium ions, high conductivity and wide electrochemical window. Meanwhile, the electrolyte solution has high compatibility with a carbon cathode material.

A high-toughness steel welded with high linear energy (More than 50 KJ/cm) and resisting molten zinc corrosion is prepared through converter smelting at 1250-1320 deg.C, vacuum treating, and rolling at 1000-1180 deg.c or lower than 950 deg.C and cumulative drafts rate is greater than or aqual to 50%. It features that composite Ti oxide is used to resist high linear energy, the Nb, V, etc. and used for raising strength, and the Cu, Ni, B and RE are used to resist molten zinc corrosion. Its advantages are simple technology with high efficiency, low cost, and high performance of finished steel.

The invention relates to a high-temperature abrasion resistant composite material and a preparation method thereof. The high-temperature abrasion resistant composite material is prepared from raw materials of the following components, by mass, of 1.0%-3.0% of short carbon fibers, 0.5%-1.0% of fine ceramic particles, 1.5%-10.0% of coarse ceramic particles, 6.0%-15.0% of graphite powder and the balance copper powder. The preparation method of the high-temperature abrasion resistant composite material comprises the steps that firstly, composite pre-alloyed powder I and spherical composite pre-alloyed powder II are prepared through the high-energy ball-milling technology with appropriate ball-milling parameters and the annealing technology respectively; then, the coarse ceramic particles, thegraphite powder, the copper powder, the composite pre-alloyed powder I and the spherical composite pre-alloyed powder II are proportioned according to the designed components and mixed uniformly, andthus mixed powder is obtained; and a high-performance finished product can be obtained after pressing and sintering. The designed and prepared copper-based composite material is excellent in mechanical performance, high-temperature resistant performance and abrasion resistant performance and high in conductivity, and the preparation technology is simple.

The invention relates to a heat-resistant cast aluminum alloy and a pressure casting method thereof. The aluminum alloy consists of the following elements according to certain weight percentage: Si, Cu, Ni, Mg, Ti, RE, Mn, Fe and the balance of Al. After pressure casting of the heat-resistant cast aluminum alloy provided by the invention, the tensile strength (sigma)b of the alloy at room temperature is greater than or equal to 400MPa, the tensile strength (sigma)b at 300 DEG C is greater than or equal to 210MPa, and the tensile strength (sigma)b at 350 DEG C is greater than or equal to 130MPa; and the elongation delta at room temperature is greater than or equal to 2.0%, the elongation delta at 300 DEG C is greater than or equal to 6.0%, and the elongation delta at 350 DEG C is greater than or equal to 14.0%. By comparing the alloy and pressure casting preparation method thereof provided by the invention with the existing Al-Si cast aluminum alloy and the pressure casting preparation method thereof, the casting performance is improved, the room-temperature and high-temperature mechanical properties of the alloy are remarkably improved, and the application range of the Al-Si cast aluminum alloy is widened.

An infra-red heater assembly takes on the conditions that afflict buildings: bed bugs, termites, other insects, molds, bacteria, and the like, and their resulting odors, and other contaminants. The assembly includes a portable electric infra-red emitting panel system with vertically stacked panels that distribute heat energy to the entire height of a wall. Removable panel covers over the infra-red heating elements protect them from damage during transport and when opened, act as deflectors, to direct, the radiant energy, widthwise, to restrict the line of site energy transferred to a wall. The heating panels are regulated by room air and wall temperature sensors to prevent structural damage and fire during usage of the invention. The infra-red heater may be pivotally mounted within its supporting structure so as to direct heat in various angular directions within the building being treated.

The invention belongs to the technical field of plastics modification and particularly relates to a modified polypropylene material for a high-performance thin-wall automobile door panel and a preparation method thereof. The material is prepared from, by mass, 5%-10% of homopolymerized PP, 20%-30% of first copolymerized PP, 15%-25% of second copolymerized PP, 12%-18% of toughening agent, 1%-2% of compatilizer, 0.4%-0.6% of antioxidant, 0.2-0.4% of weather resistance agent, 3%-6% of melting index regulator, 20%-25% of mineral enhancer, 1.5-3% of scratch resistant agent and 1-2% of other assistants. The preparation method of the modified polypropylene material comprises the steps of mixing, extrusion and granulation. The material prepared by adopting the preparation method has high liquidity, rigidity and toughness, can well meet the usage requirements of the thin-wall automobile door panel and is low in cost. Compared with the prior art, a high-liquidity allyl elastomer is used as the melting index regulator, the liquidity of the material is remarkably improved, and the thin-wall door panel forming requirements are met. In addition, high-liquidity polypropylene and a low surface energy polymer are used in a mixed mode, and the tiger skin stripe defects on the surface of the thin-wall door panel can be basically eliminated.

The invention discloses a high-strength wear-resisting heat-resisting aluminium alloy material and a preparation process thereof. The material comprises, by weight, 4.0-6.5% of copper, 0.06-0.4% of titanium, 0.08-0.6% of manganese, 0.03-0.4% of antimony, 0.4-0.6% of nickel, 1.2-1.8% of cobalt, 0.2-0.3% of zirconium, 0.2-1.8% of rare earth and the balance aluminum. During preparation of the material, a special heat treatment process is used. The material has the advantages of being capable of improving the mechanical strength, the abrasive resistance and the high-temperature deformation resistance of an aluminium alloy simultaneously, the material can be used for cast members which are required to bear a certain high temperature and have high mechanical performance requirements, and a new field of application of the aluminium alloy material is developed.