45results about How to "Resistant to thermal shock" patented technology

The invention provides an ultra-thin shielding film and a circuit board capable of changing circuit impedance, and a method for preparing same. The shielding film capable of changing the circuit impedance consists of an insulated coverage film layer, a metal foil layer, an anisotropic conductive adhesive layer and a protective release film layer; the metal foil layer is provided with meshes according to the impedance requirement design of the product and is arranged between the insulated coverage film layer and the anisotropic conductive adhesive layer; the surface of the anisotropic conductive adhesive layer is covered by the protective release film. The invention has the advantages that the ultra-thin layer of metal foil with a certain mesh dimension which is completely connected together is provided; the metal foil layer and the insulated layer have extremely high peeling strength, can durably bear heat impact and can be used for the multi-time pressing process of a soft / hard combination board; meanwhile, the thickness of a dielectric layer can be reduced and the aim of controlling the impedance can be achieved. Furthermore, the cost is low, the bending performance is excellent and the processing is easy.

The invention provides an ultra-thin shielding film and a circuit board capable of changing circuit impedance, and a method for preparing same. The shielding film capable of changing the circuit impedance consists of an insulated coverage film layer, a metal foil layer, an anisotropic conductive adhesive layer and a protective release film layer; the metal foil layer is provided with meshes according to the impedance requirement design of the product and is arranged between the insulated coverage film layer and the anisotropic conductive adhesive layer; the surface of the anisotropic conductive adhesive layer is covered by the protective release film. The invention has the advantages that the ultra-thin layer of metal foil with a certain mesh dimension which is completely connected together is provided; the metal foil layer and the insulated layer have extremely high peeling strength, can durably bear heat impact and can be used for the multi-time pressing process of a soft / hard combination board; meanwhile, the thickness of a dielectric layer can be reduced and the aim of controlling the impedance can be achieved. Furthermore, the cost is low, the bending performance is excellent and the processing is easy.

The invention provides a method for preparing an anti-oxidation Nb coating on the surface of a carbon material. In the method, ultrahigh vacuum multifunctional magnetron sputtering coating equipment is adopted, metal Nb with the purity of 99.9 percent is taken as a target, 99.99 volume percent high-purity argon is taken as sputtering gas, and the anti-oxidation Nb coating is prepared on the surface of a graphite material through direct current magnetron sputtering. The anti-oxidation Nb coating prepared by the method has high compactness and uniformity, thermal shock resistance and high high-temperature oxidation resistance; the thickness of the coating is convenient to control by adjusting a magnetron sputtering process parameter, and the coating is convenient to prepare on a large scale; the temperature rise of a base material is low when the coating is prepared, and the components of the coating are uniform and stable; and the process is relatively simple and high in repeatability.

The invention discloses a high-temperature flue gas dust removal and denitration integrated device which comprises a machine body, wherein a flue gas passage is formed inside the machine body; a fluegas inlet is formed at the lower part of the machine body; a flue gas outlet is formed at the upper part of the machine body and is conducted with the flue gas passage; a high-temperature dust removerand a SCR (Selective Catalytic Reduction) denitration reactor are sequentially mounted in a detachable mode in the machine body along a direction in which flue gas passes; the high-temperature dust remover comprises a plurality of filter cartridges regularly arranged and a dust purging collection assembly; the top end of each filter cartridge is open, and the bottom end of the filter cartridge issealed; each filter cartridge comprises at least one filter layer made of a metal fiber net; a plurality of ceramic honeycomb bodies regularly arranged are arranged in the SCR denitration reactor; each ceramic honeycomb body comprises a carrier and a catalyst distributed on the carrier; each catalyst is formed by V2O5 or rare earth elements or transition elements; each carrier adopts TiO2 or a molecular sieve or cordierite. The high-temperature dust remover and the SCR denitration reactor are mounted in a detachable mode; the filter cartridges made of the metal fiber nets are adopted; for each filter cartridge, the filtering area is not limited, filter pores are regularly arranged, and a through hole rate is high; the high-temperature flue gas dust removal and denitration integrated device is long in service life and has high-temperature resistance.

The invention discloses a heat-resistance stainless steel exhaust pipe and a manufacturing method thereof. According to a formula, the heat-resistance stainless steel exhaust pipe comprises the following components in part by mass: 11.42 to 38.66 parts of low-carbon steel, 0 to 70 parts of material remelted steel, 0.3 to 0.8 part of electrolytic manganese, 0.4 to 0.7 part of ferrosilicon, 4.1 to 13.75 parts of electrolytic nickel, 13 to 43.5 parts of ferrochromium and 0.05 to 0.1 part of deoxidizer. The preparation method comprises the following steps of: performing shot blasting, preparing materials, smelting, pouring, filling molds, shaking out sand and the like. The heat-resistance stainless steel exhaust pipe overcomes a large number of defects in the prior art, and has the advantages of high product size precision, durability, low deformation rate, simple preparation process and high yield.

The invention provides a flint-clay composite refractory brick, which is prepared from a main material and an additive, wherein the main material comprises the following raw materials in percentage by mass: 6 to 12 percent of bauxite clinker large particle, 7 to 28 percent of flint clay large particle, 15 to 27 percent of andalusite small particle, 5 to 10 percent of flint clay small particle, 15 to 27 percent of andalusite fine powder, 5 to 10 percent of flint clay fine powder and 5 to 14 percent of kaolin micro powder; the mass of the additive is 4.5 to 5.5 percent of that of the main material. The invention also provides a preparation method and application of the flint-clay composite refractory brick. The flint-clay composite refractory brick is reasonable in the matching of components, and further has favorable heat shock resistance, better heat stability and higher refractoriness under load, so as to improve the service life of a carbon roasting furnace of which the flue wall is built by applying the flint-clay composite refractory brick.

The invention relates to the field of materials, in particular to a conducting ceramic material, and discloses a novel composite conducting ceramic and a method for preparing the same. The constitution formula of the novel composite conducting ceramic is xLaAlO3:(1-x)SrTiO3, wherein x is a mole number of which the numerical range is between 0.001 and 0.015. The method for preparing the composite conducting ceramic comprises the following steps: grinding and mixing a strontium titanate substrate raw material with lanthanum aluminate evenly; tabletting the mixture at a pressure of between 8 and 12 MPa; and baking the mixture at a temperature of between 1,200 and 1,400 DEG C for 4 to 8 hours. The mol ratio of the strontium element in the strontium titanate matrix raw material to the lanthanum aluminate is (1-x) to x, wherein x is between 0.001 and 0.015. The new novel composite conducting ceramic has the performances of electrical conductivity, corrosion resistance, high temperature resistance, high strength, innocuity, thermal conductivity and the like, and is applicable to sensors, electric heating warming, industrial heating, drying and conductive ceramic for shielding electromagnetic waves for construction.

The invention relates to a Mo-S / NF hydrogen evolution material, and a preparation method and an application thereof. The preparation method comprises the following steps: 1, mixing ammonium tetrathiomolybdate, thiourea and water, and carrying out ultrasonic dispersion to obtain a mixed solution; 2) adding the mixed solution into a reaction kettle, putting foamed nickel as a carrier into the reaction kettle, and performing a hydrothermal reaction to obtain Mo-S / NF; and 3) calcining the Mo-S / NF under an oxygen-free condition to obtain the Mo-S / NF hydrogen evolution material. The hydrogen evolution material is applied to an electrocatalytic hydrogen evolution reaction. Compared with like materials in the prior art, the Mo-S / NF hydrogen evolution material prepared in the invention is low in raw material cost, simple in preparation mode and good in hydrogen evolution effect in an alkaline solution, and is expected to face industrial development.

The invention relates to a molybdenum sulfide-coated cobalt-MOF / NF hydrogen evolution material, an in-situ synthesis method and application. The method comprises the following steps: preparing a mixed aqueous solution A of 2-methylimidazole and cobalt nitrate hexahydrate; putting a foam liquid into the mixed aqueous solution A prepared in the step S1, and conducting standing and soaking to obtain Co-MOF / NF; mixing ammonium molybdate hydrate, sodium sulfide nonahydrate and deionized water to obtain a mixed solution B; and transferring the Co-MOF / NF into the mixed solution B, and carrying out a constant potential electrodeposition reaction to obtain MoS2-coated Co-MOF / NF. Compared with the prior art, the preparation method has the advantages that the flaky Co-MOF is self-loaded on the NF, so that the specific surface area of the material is increased, the contact area of the material and water is increased, hydrogen is easier to prepare, meanwhile, the nano structure of the material is improved, and the hydrogen evolution performance and stability of the material are improved.

This is to provide an anisotropic electro-conductive film having high reliability, which electrically connects circuit electrodes having a fine pattern. Provided is an anisotropic film containing an insulating resin and particle groups, wherein the particle groups are groups of particles in which a plurality of particles are bound together with a binder, and the particle groups are regularly arranged with an interval of 1 mum to 1,000 mum.

The present invention is preparation process of high temperature oxidation resisting coating on the surface of carbon material. The preparation process includes the steps of: cleaning and stoving the surface of the carbon material, compounding slurring with silica powder, boron powder, water and adhesive in certain weight proportion, coating the slurry onto the surface of the carbon material through soaking, spraying or brushing to form slurry layer of 200-240 micron thickness, drying, heating in vacuum resistive furnace first at 400-500 deg.c for 10-20 min and then at 1420-1500 deg.c for 20-30 min, and cooling to obtain high temperature oxidation resisting ceramic coating. The present invention has simple technological process, high production efficiency, good repeatability and low production cost and is suitable for industrial production.

The invention discloses a method for making gradient silicon carbide coating by electrophoresis codeposition, which includes the following steps: by ultrasonic processing, suspending liquid A is prepared by silica powder, carbon soot, caking agent polyvinyl butyral, acetone and additive n-butylamine which are mixed according to the mass proportion of 2-16:20:15:100:1; by ultrasonic processing, suspending liquid B is prepared by silica powder, carbon soot, polyvinyl butyral, acetone and n-butylamine which are mixed according to the mass proportion of 16-30:20:15:100:1; by ultrasonic processing,suspending liquid C is prepared by silica powder, carbon soot, polyvinyl butyral, acetone and n-butylamine which are mixed according to the mass proportion of 15-40:10:15:100:1; by ultrasonic processing, suspending liquid D is prepared by silica powder, carbon soot, polyvinyl butyral, acetone and n-butylamine which are mixed according to the mass proportion of 40-70:10:15:100:1; with graphite material as the anode, under a constant potential mode the suspending liquids above are deposited, dried, heated to be between 1200 DEG C and 1600 DGE C, and preserved at the temperature for 20 to 60 minutes. The invention has the advantages of simple process, good thermal-shock resistance and oxidation resistance, controllable coating thickness and uniform coating.

The invention discloses a nano ceramic coating capable of being cured at a normal temperature. The nano ceramic coating comprises a component A consisting of silicon sol, pigments, filler and water, and a component B consisting of siloxane, an aid, a drier and a solvent. The nano ceramic coating can be cured at the normal temperature, so that the application range is enlarged. In addition, the invention also discloses a preparation method of the nano ceramic coating capable of being cured at the normal temperature. The preparation method comprises the following steps: step 1, weighing the silicon sol, pigments, filler and water according to a corresponding ratio, mixing, stirring an obtained mixture, grinding the uniformly stirred mixture to powder with fineness of not higher than 25 micrometers, and adopting the powder as the component A; weighing the siloxane, aid, drier and solvent according to a corresponding ratio, mixing, uniformly stirring an obtained mixture, and adopting the mixture as the component B; and step 3, sufficiently mixing the component A and the component B according to a ratio, and generating the nano ceramic coating.

The invention relates to a turbocharger shell and a preparation method thereof. According to a formula, the turbocharger shell is prepared from the following components in part by weight: 28 to 30 parts of pig iron, 3 to 8 parts of low-carbon steel, 32.53 to 45.2 parts of recirculated iron, 0.3 to 0.4 part of electrolytic manganese, 3.4 to 4.12 parts of No.75 ferrosilicon, 17.4 to 21.2 parts of electrolytic nickel, 1.4 to 1.95 parts of ferrochromium, 0.5 to 0.8 part of nickel magnesium nodulant and 0.8 to 1.0 part of inoculant. The preparation method comprises the following steps of: shot blasting, material preparation, smelting, nodulizing, pouring and mold-filling, shakeout and the like, wherein during mold-filling, pouring is performed after two external mold cores are closed, a set ofexternal mold core cavity is adopted for each product, the product is inoculated by a stream inoculation device, and the inoculant enters the cavity along molten iron. The product prepared according to the formula and the preparation method has the advantages of high dimensional accuracy, durability, stable size of castings and low deformation rate.

The invention relates to a method for melting metal by a household microwave oven, and belongs to the technical field of melting metal. The method comprises the following steps: using cerium oxide as a stabilizing agent and using a zircite ceramic crucible containing 5 to 20 percent of cerous phosphate as a container, insulating heat around the crucible by a porzite fiber material, placing a silicon carbide ring between the crucible and the porzite fiber, putting a block shaped metal into the crucible, heating the metal by microwave in the microwave oven, taking out the silicon carbide ring after the metal is heated for 10 to 20 minutes, and continuously heating the metal. The method can melt metal with the melting point below 1,500 DEG C; and the melted metal does not adhere to the wall surface of the crucible, impurities are not introduced into the metal, and the temperature on the inner wall of a cavity of the microwave oven is lower than 100 DEG C. The method can be used for quickly melting small pieces of metal in the fields such as assaying, purifying, reclaiming and precisely casting the metal, and the like.