30results about How to "Low thermal conductivity at high temperature" patented technology

A method for preparing an aluminum alloy element surface coating comprises the following steps of sequentially pre-treating the aluminum alloy element surface, preparing aluminum alloy element surface arcing-blocking coating, preparing aluminum alloy surface insulation composite ceramic coating and performing post-treatment; the preparation of aluminum alloy element surface arcing-blocking coating is to perform coating in a deionized water electrolyte system composed of NaOH, Na2SiO3, (NaPO3)6 and K2ZrF6; the system for the preparation of aluminum alloy element surface coating comprises a stainless steel solution tank (7), tooling (4), an aluminum alloy element (5), a stirrer (2), a thermometer (6), a water-circulating cooling device (1) and power supply equipment (8). The aluminum alloy member surface coating obtained from the method and the system of the invention has the advantages of high toughness and strong binding capacity with the surface of the aluminum alloy element, long service life and excellent heat insulation performance.

The invention relates to nano-Si-based composite thermal insulation paint and a preparation method thereof, belongs to the field of thermal insulation paint and aims to solve the problems of powder and slag falling, low high-temperature resistance coefficient, harm to environmental protection and high cost of existing paint. The nano-Si-based composite thermal insulation paint is prepared from thefollowing raw materials in parts by weight: 25-40 parts of waste cellucotton, 10-15 parts of a quick penetrating agent T, 20-30 parts of attapulgite hydrosol, 10-20 parts of silica hydrosol, 80-110 parts of vitrified microbeads, 5-10 parts of floating beads, 10-20 parts of expanded perlite and 380-620 parts of water. The paint comprises the waste cellucotton, a waste material is recycled, and theproblem about environmental protection is solved; ordinary insulation cotton is burnt off easily in case of fires and the protective effect on pipe equipment is lost, while the raw materials of the paint are carbonized and vitrified on surface in high-temperature flames and cannot be burnt off accordingly, and the pipe equipment is protected from losses.

The invention relates to the technical field of airgel, in particular to a method for preparing a silica / graphene composite airgel and the obtained composite airgel. Graphene oxide reacts with amino-containing trialkoxysilane to obtain alkoxysilanized graphene, alkoxysilanized graphene is ultrasonically dispersed in an organic solvent for hydrolysis to obtain hydrolyzate A, and conventional silicon sources are hydrolyzed to obtain hydrolyzate B , the hydrolyzate A and the hydrolyzate B are mixed evenly, and the wet gel is obtained after alkaline condensation, and then after aging, solvent replacement and surface modification, the silica / graphene composite airgel is obtained by drying. The silicon dioxide / graphene composite airgel of the present invention has relatively high mechanical strength, and the presence of graphene reduces the high-temperature thermal conductivity of the silicon dioxide airgel, and can be applied in the fields of thermal insulation materials and the like.

The invention relates to a composition, a porous carbon fiber thermal insulation material high-surface-emissivity anti-oxidation coating prepared from the composition and a preparation method of the porous carbon fiber thermal insulation material high-surface-emissivity anti-oxidation coating. The composition comprises the following ingredients: transition metal boride, refractory metal silicide,silicon carbide powder, polycarbosilane and cerium oxide. The preparation method comprises the following steps: preparing pulp; coating the pulp on a porous carbon fiber thermal insulation material; drying the porous carbon fiber thermal insulation material coated with the pulp, then performing thermal treatment on the dried porous carbon fiber thermal insulation material and sintering the porouscarbon fiber thermal insulation material after thermal treatment in sequence, so as to obtain the porous carbon fiber thermal insulation material high-surface-emissivity anti-oxidation coating. The composition is applied to preparation of the coating, so that the sintering temperature can be reduced; the prepared coating has the advantages of being comparatively high in emissivity, comparatively low in high temperature thermal conductivity and good in ultrahigh temperature stability. Therefore, the coating is hopefully applied to a thermal protection system of a hypersonic vehicle.

The invention relates to the field of high temperature resistance and heat insulation, in particular to high temperature resistance multilayer heat insulating composite material and a manufacturing method thereof. The finished product comprises the following components according to parts by weight: 1 to 3 parts of quartz fibre meshes, 7 to 12 parts of ceramic high-temperature continuous fibre cloth, 3 to 7 parts of ceramic fibre paper, 55 to 80 parts of inorganic high- temperature refractory mortar, 5 to 7 parts of SiO2 aerogel, 5 to 7 pars of potassium titanate whiskers and 3 to 5 parts of flaky mica or flaky metal. The density of the high temperature resistance multilayer heat insulating composite material finished product prepared through the manufacturing method is very low, and the adhesive effect is good. The method has the advantages that the method is simple and easy to be operated, the heat insulation effect of the product is good, the strength can meet the operating requirement, and the method has wide application prospect.

The invention relates to a high-infrared reflectivity high-aluminum light fire-resistant thermal insulating material and a preparation method thereof. According to the technical scheme of the High-infrared reflectivity high-aluminum light fire-resistant thermal insulating material and the preparation method thereof, 20-40 wt% of potassic raw material, 50-70wt% of titaniferous raw material and 5-10 wt% of binding agents are uniformly mixed, grinding is conducted after molding and thermal treatment are conducted, and A material with particle size ranging from 0.088-1 mm and B material with particle size smaller than 0.088 mm are obtained. 20-40 wt% of alumina particles, 10-25 wt% of alumina fine powders, 5-15 wt% of A material, 5-15 wt% of B material, 5-15 wt% of aluminiferous raw material and 2-10 wt% of potassic raw material are used as mixture, water containing 2-8 wt% of the micture are added, a green body is made by stirring, drying is conducted, cooling is conducted after the thermal treatment is conducted, the green body is soaked with water, then drying is conducted, and the high-infrared reflectivity high-aluminum light fire-resistant thermal insulating material is obtained. The high-infrared reflectivity high-aluminum light fire-resistant thermal insulating material has the advantages that the volume density is low, the compression strength is high, and the high-temperature heat conductivity coefficient is low. The high-infrared reflectivity high-aluminum light fire-resistant thermal insulating material can also be applied to the heat insulation field within 1300 DEG C for a long time.

The invention discloses an aluminum-titanium-doped silica airgel / fiber composite material and a preparation method thereof. Anhydrous ethanol, hydrochloric acid solution, aluminum chloride hexahydrate, and tetrabutyl titanate are added to a reaction kettle, Measure tetraethyl orthosilicate and slowly pour it into the reaction kettle, stir to obtain a sol; add a gel accelerator and continue to stir to obtain a composite sol; impregnate the glass fiber mat into the composite sol, and place the impregnated glass fiber mat on a flat plate Lay flat on the top; put the glass fiber mat impregnated with composite sol in a plastic box and seal it for gel aging, and use a solvent to replace the aged gel / glass fiber composite material; gel / glass fiber composite The material is supercritically dried. The invention can enhance the strength and toughness of the aerogel while retaining the heat insulation property of the aerogel, and improve the high-temperature resistance performance of the silica aerogel by doping with aluminum elements, and the prepared airgel / fiber composite material has very high Good stability and thermal insulation properties.

The invention relates to a high-strength lightweight forsterite fireproof material and a preparation method therefor. The scheme is as follows: the preparation method comprises the steps: firstly, uniformly mixing a siliceous raw material, a magnesium salt, a zinciferous raw material, iron powder and boric acid, carrying out forming, carrying out heat treatment in a reducing atmosphere, and carrying out grinding, thereby obtaining a material A; then, mixing the material A, a surfactant, a thickener, an additive and water, and carrying out ball-milling, thereby obtaining slurry; then, uniformly mixing a siliceous raw material, fine magnesia powder, a zinciferous raw material, municipal sludge and a surfactant, carrying out forming, carrying out heat treatment in a reducing atmosphere, carrying out heat treatment in a neutral atmosphere, and carrying out grinding, so as to obtain a material B and a material C; and finally, uniformly mixing magnesia granules, fine magnesia powder, a siliceous raw material, the material B, the material C, a zinciferous raw material and the slurry, carrying out forming, and carrying out heat treatment, thereby preparing the high-strength lightweight forsterite fireproof material. According to the high-strength lightweight forsterite fireproof material and the preparation method therefor, the source of the raw materials is wide, and the production cost is low; and the prepared product is excellent in high-temperature resistance, high in strength and small in high-temperature coefficient of thermal conductivity and can be used in a long term in high-temperature environments in contact with reducing atmosphere, alkaline dust and the like.

The invention relates to a high-strength low-thermal conductivity ceramic fiber thermal insulation material and a preparation method thereof. According to the technical scheme of the high-strength low-thermal conductivity ceramic fiber thermal insulation material and the preparation method thereof, titaniferous raw material, magniferous raw material and binding agents are uniformly mixed, grinding is conducted after molding and thermal treatment are conducted, and A material with particle size ranging from 0.088-1 mm and B material with particle size smaller than 0.088 mm are obtained; potassic raw material, titaniferous raw material and the binding agent are uniformly mixed, grinding is conducted after molding and thermal treatment are conducted, and c material with particle size smaller than 0.088 mm is obtained; then the A material, the B material, the C material and the potassic raw material are mixed uniformly, grinding is conducted after thermal treatment is conducted, and D material with particle size ranging from 0.088-1 mm is obtained; the pretreated ceramic fiber, the B material, the C material, the D material, the binding agent and additive are mixed uniformly, water is added, stirring is conducted, the mixed solution is poured into a die, and the high-strength low-thermal conductivity ceramic fiber thermal insulation material is obtained through the steps of vacuum dewatering, drying and thermal treatment. The high-strength low-thermal conductivity ceramic fiber thermal insulation material and the preparation method thereof have the advantages are low in cost, the prepared product is low in volume density, high in breaking strength and low in high-temperature heat conductivity coefficient.

The invention relates to a high-infrared-reflectivity forsterite lightweight refractory and thermal insulation material and a preparation method thereof. According to the technical scheme, the method comprises the following steps: uniformly mixing a titanium-containing raw material, a magnesium-containing raw material and a binding agent, molding, carrying out heat treatment, and grinding, thus obtaining an A material with a particle size of 0.088-1mm and a B material with a particle size of less than 0.088mm; uniformly mixing a potassium-containing raw material, a titanium-containing raw material and a binding agent, molding, carrying out heat treatment, and grinding, thus obtaining a C material with a particle size of 0.088mm; uniformly mixing the A material, the B material, the C material and a potassium-containing raw material, carrying out heat treatment, and grinding, thus obtaining a D material with a particle size of 0.088-1mm and an E material with a particle size of 0.088mm; and finally, mixing forsterite particles, fine forsterite powder, the A material, the D material, the E material, a magnesium-containing raw material, a silicon-containing raw material and a potassium-containing raw material, molding, drying, carrying out heat treatment, cooling, soaking and drying. The prepared high-infrared-reflectivity forsterite lightweight refractory and thermal insulation material is low in volume density, high in compression strength, and low in high-temperature heat conductivity coefficient.

The invention relates to a nano ceramic thermal insulation material and a preparation method thereof. The preparation method comprises the following steps: preparing a glue solution from superfine lanthanum-based rare earth oxide, an yttrium oxide stabilized nano zirconium oxide auxiliary agent, nano titanium dioxide and nano aluminum oxide aqueous solution, attapulgite hydrosol, silicon dioxide hydrosol and fly ash; and then preparing the nano ceramic thermal insulation material by utilizing the glue solution, magnesium aluminum silicate fibers, sepiolite fabric, vitrified micro beads and power plant floating beads. The prepared material has the advantages of better high temperature resistance, higher strength, better toughness and no pollution.

The invention relates to the field of high temperature resistance and heat insulation, in particular to a high-temperature-resistance and heat-insulation coating and the production method thereof. The finished product of the coating comprises the following components: 55 to 80 weight parts of inorganic high-temperature refractory adhesive mortar, 5 to 7 weight parts of SiO2 aerogel, 5 to 7 weight parts of hexapotassium titanate whisker, 3 to 5 weight parts of lamellar mica or lamellar metal and 90 to 120 weight parts of acetone or absolute alcohol. The production method comprises the following steps: a) firstly, screening the SiO2 aerogel containing grains with appropriate size, and pouring the appropriate amount of the acetone or the absolute alcohol into the SiO2 aerogel and fully stirring, wherein the contents of the SiO2 aerogel and the acetone or the absolute alcohol are 5 to 7 weight parts of the SiO2 aerogel and 90 to 120 weight parts of the acetone or the absolute alcohol; and b) adding 3 to 5 weight parts of the lamellar mica or 3 to 5 weight parts of the lamellar metal, 55 to 80 weight parts of the inorganic high-temperature refractory adhesive mortar and 5 to 7 weight parts of the hexapotassium titanate whisker to the mixture prepared in the step a), and fully stirring so as to prepare the high-temperature-resistance and heat-insulation coating. The production method is simple and easy to operate. The high-temperature-resistance and heat-insulation material obtained by using the method has the advantages of good heat insulation effect, high strength and wide prospect on the application.

The invention provides an inorganic thermal insulation material, which is prepared by the following raw materials by weight: 2.5-6 parts of attapulgite, 3.5-4.5 parts of perlite, 1.5-5.0 parts of ceramic beads, 0.0-5 parts of palygorskite, 0.0-5.5 parts of sepiolite, 0.5-1.0 part of a fast penetrant T, 0.25-0.75 part of lightweight magnesium carbonate, 1.5-3.5 parts of brucite, 0.25-0.75 part of alumina silicate fiber cotton, 0.5-0.8 part of lithium silicate, 0.7-1.0 part of magnesium oxide, 0.10-0.25 part of titanium dioxide, 0.25-0.75 part of carboxymethyl cellulose and 70-81.25 parts of water. The thermal insulation material of the invention can be used at a temperature ranging from -40DEG C to 800DEG C, and has low thermal conductivity which can be 0.059W / m.k at a temperature of 70DEGC, especially low high temperature thermal conductivity, which can be 0.085W / m.k at a temperature of 350DEG C.

The invention relates to a high temperature resistant Si-C-O aerogel thermal insulation composite material and a preparation method thereof. The preparation method comprises the following steps: mixing an Si source and a C source, and carrying out hydrolysis and condensation polymerization to form a sol which has a nanometer porous three-dimensional network skeleton structure and contains three elements of Si, C, and O in the network structure; compositing the sol with a high temperature resistant inorganic ceramic fiber to form a fiber-gel mixture; carrying out supercutical fluid drying to obtain an Si-C-O aerogel precursor composite material with the nanometer porous structure; and cracking the Si-C-O aerogel precursor composite material in high temperature inert atmosphere to form the Si-C-O aerogel thermal insulation composite material with an Si-O bond and an Si-C bond coexisting. The thermal conductivities of the Si-C-O aerogel thermal insulation composite material prepared in the invention at 800DEG C, 1000DEG C, and 1200DEG C are low to 0.32W / m.K, 0.043 W / m.K, and 0.051 W / m.K respectively, and the bending strength of the Si-C-O aerogel thermal insulation composite materialis 2.6MPa, so the Si-C-O aerogel thermal insulation composite material can satisfy stringent thermal insulation requirements by aerospace fields, military fields and civil fields.

A method for preparing an aluminum alloy element surface coating comprises the following steps of sequentially pre-treating the aluminum alloy element surface, preparing aluminum alloy element surface arcing-blocking coating, preparing aluminum alloy surface insulation composite ceramic coating and performing post-treatment; the preparation of aluminum alloy element surface arcing-blocking coating is to perform coating in a deionized water electrolyte system composed of NaOH, Na2SiO3, (NaPO3)6 and K2ZrF6; the system for the preparation of aluminum alloy element surface coating comprises a stainless steel solution tank (7), tooling (4), an aluminum alloy element (5), a stirrer (2), a thermometer (6), a water-circulating cooling device (1) and power supply equipment (8). The aluminum alloy member surface coating obtained from the method and the system of the invention has the advantages of high toughness and strong binding capacity with the surface of the aluminum alloy element, long service life and excellent heat insulation performance.

The invention provides a calcium silicate fireproof board and a preparation method thereof. The calcium silicate fireproof board comprises the following raw materials in parts by weight: 0.1-80 parts of hydrated calcium silicate; 10-70 parts of quartz; 0-20 parts of cement 0-20 parts of wood pulp fiber; 10-70 parts of lime; the calcium-silicon ratio of the raw material is 0.1-5. The preparation method of the calcium silicate fireproof board includes pulping, molding by flow-flow process, steam curing and drying. The calcium silicate fireproof board successfully applies hydrated calcium silicate to the fireproof board, its high-temperature thermal conductivity is less than 0.2W / (M×K), and its thermal shrinkage rate is less than 0.3%. It solves the problem that solid waste-based silicon-containing materials are difficult to use Problem: The preparation method has simple process, mild conditions, low cost and easy industrial application.

The invention relates to a high-infrared reflectivity spinel light fire-resistant thermal insulating material and a preparation method thereof. According to the scheme of the high-infrared reflectivity spinel light fire-resistant thermal insulating material and the preparation method thereof, titaniferous raw material, magniferous raw material and binding agents are uniformly mixed, grinding is conducted after molding and thermal treatment are conducted, and A material with particle size ranging from 0.088-1 mm and B material with particle size smaller than 0.088 mm are obtained; potassic raw material, titaniferous raw material and the binding agent are uniformly mixed, grinding is conducted after molding and thermal treatment are conducted, and c material with particle size smaller than 0.088 mm is obtained; then the A material, the B material, the C material and the potassic raw material are mixed uniformly, grinding is conducted after thermal treatment is conducted, and D material with particle size ranging from 0.088-1 mm and E material with particle size smaller than 0.088 mm are obtained; finally, the magnesium aluminate spinel particles, magnesium aluminate spinel fine powders, the A material, the D material, the E material, the magniferous raw material, the aluminiferous raw material and the potassic raw material are mixed, water is added, the stirring is conducted, drying is conducted on a green body formed by pressing, the green body is soaked with water after thermal treatment is conducted, and drying is conducted. The prepared product is low in volume density, high in compression strength and low in high-temperature heat conductivity coefficient.

The invention discloses a high-infrared-reflectivity ceramic fiber heat-insulating material and a preparation method thereof. The preparation method includes: grinding potassium-containing raw material, titanium-containing raw material and binding agent after being mixed well, formed and thermally treated to obtain a material A of 0.088-1mm in granularity and a material B smaller than 0.088mm in granularity; drying the material A after being soaked by water, and thermally treating the material A under condition of 1000-1200 DEG C to obtain a material C; disposing ceramic fiber in a titanium-compound-containing solution of 5-30wt% in concentration, stirring, filtering, drying, and thermally treating to obtain pre-treated ceramic fiber; mixing the pre-treated ceramic fiber, the material B, the material C, the binding agent and additive well, and adding water for stirring to form slurry; injecting the slurry into a die, dewatering in a vacuum manner, drying, thermally treating under condition of 800-1100 DEG C, and cooling to obtain the high-infrared-reflectivity ceramic fiber heat-insulating material. The preparation method is low in production cost, and the high-infrared-reflectivity ceramic fiber heat-insulating material prepared by the method has the advantages of low size density, high bending strength and low high-temperature heat conducting coefficient.