38results about How to "Fill pores" patented technology

The invention discloses a method for preparing a silicon carbide coating on a graphite surface. The method includes, firstly, placing a graphite crucible containing solid silicone materials in a high temperature graphitizing furnace and placing a graphite base body on a graphite support in the graphite crucible to generate a silicon carbide coating by means of direct reaction of silicon steam and carbon on the surface of the graphite base body; and secondly, placing the graphite base body which generates the silicon carbide coating on the surface in a chemical vapor deposition (CVD) furnace to be pyrolyzed on the surface of the silicon carbide coating which is located on the surface of the graphite base body to generate a CVD silicon carbide coating. According to the method for preparing the silicon carbide coating on the graphite surface, by means of the direct reaction of the silicon steam formed by heating the solid silicone materials and the carbon on the surface of the graphite base body, an in-situ formed chemical vapor reaction (CVR) silicon carbide coating is firmly combined on the graphite base body so that combination intensity is improved; and then a CVD process is used for pyrolyzing the CVR silicon carbide coating at high temperatures on the CVD silicon carbide coating so that pore space of the CVR silicon carbide coating is effectively filled, and combination strength is improved.

The invention relates to a high-reflective acrylic polyurethane coating composition which comprises a component A and a component B in a mass part ratio of 20;3. The component A in 100 parts by mass comprises the following materials in part by mass: 30-50 parts of modified hydroxyl acrylic resin, 2-6 parts of auxiliaries, 35-45 parts of heat reflective pigments, 4-8 parts of aerogel and 10-15 parts of organic solvent. The component B in 100 parts by mass comprises the following materials in part by mass: 75-90 parts of polyisocyanate and 10-25 parts of organic solvent. The modified hydroxyl acrylic resin is obtained by cold-blending modified resin and hydroxyl acrylic resin in a mass part ratio of 1-3: 1; the solid content of the modified hydroxyl acrylic resin is greater than or equals to 75wt%; the particle size of heat reflective pigments ranges from 0.55 micron to 1.2 microns; the particle size of the aerogel ranges from 1 micron to 80 microns; the pore size of the aerogel ranges from 10 nanometers to 20 nanometers; and the heat conductivity coefficient of the aerogel is less than or equals to 0.015W/(m k). The polyisocyanate is one or more of HDI (hexamethylene diisocyanate) biuret, HDI trimer and IPDI (isophorone diisocyanate) trimer curing agents. The high-reflective acrylic polyurethane coating composition is high in reflective insulation quality; and the quantity of VOC (volatile organic compounds) of the high-reflective acrylic polyurethane coating component is low.

The invention provides a vacuum heat insulating plate and preparation and application of the vacuum heat insulating plate. The vacuum heat insulating plate comprises a heat insulating core material and a film material coating the heat insulating core material. The heat insulating core material comprises nanoscale silicon dioxide and is formed by mixing the nanoscale silicon dioxide with multi-scale expanded perlites and chopped fibers in the weight ratio of 10:5-30:1. The specific surface area of the nanoscale silicon dioxide is 100-400m<2>/g. The incompact stacking density of the multi-size expanded perlites is lower than 350kg/m<3>. The length of the chopped fibers is less than 10mm, and the diameter is less than 20mum. The vacuum heat insulating plate is obtained by uniformly mixing the raw materials, putting the uniformly mixed raw materials into a mold for pressing and molding, taking out the molded core materials, drying the molded core materials to constant weight, putting the core materials into a bag which is prepared from the film material in advance, vacuumizing till the vacuum degree is less than 0.1Pa, and then performing hot sealing. The vacuum heat insulating plate is high in strength and good in heat insulating effect. In this way, the vacuum heat insulating plate is applied to the heat insulation of building walls.

The invention provides an equipment cabin pultrusion technology. The equipment cabin pultrusion technology comprises the steps that firstly, fiber yarn and fiber fabric are discharged at the same time, an equipment cabin body part is made of fiber fabric, and fiber yarn is adopted at the corner part or the thickened part; secondly, a pre-forming die is used for conducting pre-forming treatment onthe fiber yarn and the fiber fabric, the pre-forming die comprises a plurality of pre-forming plates, the pre-forming plates are provided with hollow grooves, the hollow grooves can gradually change,and finally the product shape is formed; thirdly, glue injection type pultrusion is conducted on the pre-formed fiber yarn and the pre-formed fiber fabric; fourthly, a curing die is used for conducting curing on the fiber yarn and the fiber fabric obtained after pultrusion; and fifthly, an automatic cutting machine is used for cutting the cured fiber yarn and the cured fiber fabric. Compared withthe prior art, the fiber fabric and fiber yarn mixed pultrusion manner is adopted, holes of the fiber fabric are filled, the fiber content reaches up to 80%, and the equipment cabin mass is further reduced.

The invention belongs to the technical field of weaving material deep processing and particularly relates to a mildewproof treatment method for corn bran. The mildewproof treatment method for corn bran comprises the steps of corn bran temporary storage, soaking treatment, suffocating treatment, drying and the like. Compared with the prior art, the mildewproof treatment method provided by the invention has the following advantages: a corresponding placement method is provided for collected corn bran, and raw material loss caused during storage can be reduced greatly; a soak solution is used for soaking, thereby not only playing a sterilizing and softening effect, but also filling gaps in corn bran, and effectively preventing shrinking and aging after the suffocating and during drying of the corn bran; after suffocating, the luster of the corn bran is enhanced, the corn bran is pure white and soft, the use ratio of the corn bran during a weaving process is improved, product quality is improved, the appearance retention rate is relatively high, the service life period is prolonged, and market requirements are met.

The invention provides an ecological cement high-strength grouting material and a preparation method thereof. The ecological cement high-strength grouting material has the advantages of high flowability, favorable constructability, long operable time and smooth and flat surface after completion, and can perform self-remaining leveling. The ecological cement high-strength grouting material comprises a cementing material, aggregate and an additive, wherein the cementing material comprises slag powder, desulfurized gypsum and an alkaline activator; the aggregate is prepared from, by weight, 250-300 parts of 20-40-mesh quartz sand, 100-150 parts of 40-70-mesh dried sand and 100-150 parts of 70-120-mesh dried sand; and the additive comprises, by weight, 1-2 parts of a water reducing agent, 0.1-0.6 part of a retarder, 0.1-0.3 part of a plastic expanding agent and 0.1-0.3 part of a defoaming agent.

The invention relates to novel nano-modified high-strength concrete which comprises the following components in parts by mass: 170-220 parts of water; 340 to 460 parts of Portland cement; 600 to 850 parts of aggregate; 13-28 parts of a nano porous material; 220 to 250 parts of nanometer fibers; 50 to 80 parts of silica fume; 65 to 95 parts of mineral powder; 3-5 parts of a water reducing agent; 15-30 parts of a filling reinforcing material; according to the nano-modified high-strength concrete disclosed by the invention, Portland cement and aggregate are used as main materials of the concrete;the nano porous material and the nano fiber are added to modify the concrete, so that the mechanical property, the salt resistance, the frost resistance and the high temperature resistance of the concrete are improved, meanwhile, the overall workability and the flowability are maintained, internal pores of the concrete are effectively filled, and the grain composition and the compactness are improved.

The present invention provides a with tertiary air duct curve prefabricated component for a cement kiln, and aims to resolve the problem of poor anti-erosion performance of the tertiary air duct curve of the prior art. The tertiary air duct curve prefabricated component for the cement kiln comprises the following components by weight parts of: 15-25 parts of 5-8mm black corundum, 15-20 parts of 3-5mm black corundum, 10-15 parts of 1-3mm black corundum, 10-15 parts of 0-1mm black corundum, 10-20 parts by 0-1mm of silicon carbide, 6-10 parts of silicon carbide powder not larger than 200 mesh, 5-10 parts of brown alumina powder not larger than 200 mesh, 4-7 parts of calcium aluminate cement, 3-5 parts of alumina powder, 4-6 parts of silica powder, 0.10-0.15 part of a water reducing agent, 0.01-0.02 part of explosion-proof fiber and 0.5-1 part of heat-resistant steel fiber. The invention uses black corundum and silicon carbide as the main materials for the tertiary air duct curve prefabricated component, and the black corundum can make the matrix and aggregate fully connect and cement at high temperature, effectively fill the pores of aggregate and significantly improve the high temperature properties of the material, thereby increasing the abrasion resistance and alkali erosion resistance of the tertiary air duct curve inner liner.

The invention discloses a preparation method of modified fluorgypsum powder. Fluorgypsum waste residues after production of hydrofluoric acid are cooled through a horizontal cooling converter, saponification slag and quicklime are added, the mixture is uniformly mixed, the mixture, alums and fly ash are jointly subjected to ball milling, and the modified fluorgypsum powder is prepared. According to the preparation method of the modified fluorgypsum powder, the preparation process is simple, a few procedures are adopted, generation of pungent smell is effectively reduced in the preparation process, the cost is low, and the prepared modified fluorgypsum powder is wide in application range.

The invention discloses a durable emulsified asphalt mixture prepared from waste tire rubber powder. The durable emulsified asphalt mixture is prepared from epoxy resin modified emulsified asphalt, aggregate, a curing agent and tire rubber powder, wherein the epoxy resin modified emulsified asphalt accounts for 8-10% of the aggregate in percentage by mass; the curing agent accounts for 3-4% of themass of the epoxy resin modified emulsified asphalt; and the tire rubber powder is obtained by shearing and crushing waste tires, and the mass of the tire rubber powder accounts for 1-3% of the massof the aggregate. According to the durable emulsified asphalt mixture, the tire rubber powder is added, so that the durability and the wear resistance of a pavement can be kept for a long time, the service life of the pavement is greatly prolonged, and meanwhile, reutilization of rubber resources and environmental protection are facilitated.

The invention discloses adhesive mortar capable of being used for large board bonding, which is prepared from the following components in parts by weight: 70 to 80 parts of Portland cement, 20 to 30 parts of sulphoaluminate cement, 8 to 10 parts of hydroxyethyl methyl cellulose, 2 to 3 parts of modified silicon oxide aerogel and 80 to 100 parts of quartz sand, the modified silicon oxide aerogel is prepared by the following steps: firstly, carrying out surface silanization treatment on superfine silicon oxide aerogel by adopting 3-(methacryloyloxy) propyltrimethoxysilane, and then inducing carbonate precipitation by adopting microorganisms to carry out modification. The invention also discloses a preparation method of the adhesive mortar, and the adhesive mortar prepared by the invention not only has good tensile adhesive strength, but also has good mechanical properties, excellent sagging resistance and good volume stability.

The invention discloses compound amorphous seed added electrical porcelain and a preparation method thereof. The compound amorphous seed added electrical porcelain is prepared from the following raw materials in weight percent: 10-20% of SiO2, 10-25% of Al2O3, 10-20% of Fe2O3, 1-5% of TiO2, 2-10% of CaO, 0-3% of MgO, 5-15% of K2O, 3-8% of Na2O, and 5-20% of compound amorphous seeds. According to the compound amorphous seed added electrical porcelain and the preparation method thereof disclosed by the invention, the compound amorphous seeds (CaB2O4 amorphous seed and CaB4O7 amorphous seed) are added, so that the softening characteristic of the amorphous seeds can be exerted, and the sintering process of the electrical porcelain can be promoted; in the temperature raising process, the compound amorphous seeds can be converted into compound seed crystals (CaB2O4 seed crystal and CaB4O7 seed crystal), and the seed crystals are molten to form a liquid phase, so that the sintering process of the electrical porcelain can be further promoted, the density of the electric porcelain can be improved, and the breaking strength of the electrical porcelain is obviously enhanced; in addition, the addition of the compound amorphous seeds can effectively facilitate crystallization of mullite phase, and furthermore the mechanical strength of the electrical porcelain is obviously improved. The preparation method disclosed by the invention is simple and accessible in raw materials, stable and mature in process, and capable of meeting the requirements of practicability and industrialization.

The invention provides a fiber cement external wall board and a preparation method thereof. The fiber cement external wall board comprises the following components in parts by weight: 80-120 parts ofcement, 22-27 parts of silicon micropowder, 43-58 parts of closed-pore vitrified microbeads, 20-29 parts of talcum powder, 12-18 parts of mica, 20-28 parts of wood fiber and 27-34.5 parts of fly ash,wherein the silicon micropowder has the particle size of 10-20 microns and has the silicon dioxide content of 99% or above. Through addition of a certain proportion of silicon micropowder into a production formula, pores of a cement substrate can be effectively filled, the compactness of the board is improved, and the water absorbing rate is reduced; meanwhile, through production of a gel by virtue of a hydration reaction of the silicon micropowder and the cement, adhesion between the fiber and the cement is strengthened and the flexural strength of the board is effectively improved.

The invention discloses an aerogel heat insulation sleeve for a battery. The aerogel heat insulation sleeve for the battery comprises a cylindrical sleeve body with one end sealed, wherein grooves are formed in the sleeve body in an axis direction, and the number of the grooves is 1-4, and the grooves are evenly distributed in the circumferential direction. The preparation method comprises the following steps: (1) continuously pumping uniform superfine fiber slurry into a hollow special-shaped mold, allowing fibers to be stacked in the mold and to be automatically woven and formed, and then carrying out drying and demolding to obtain a superfine fiber sleeve; (2) preparing a silicon dioxide micelle particle solution; (3) adding the silicon dioxide micellar particle solution into the superfine fiber sleeve, and then conducting treatment by using a mechanical wave dispersion method to obtain a heat insulation sleeve gel preform; (4) putting the heat insulation sleeve gel preform into an alcoholic solution of a water repellent for modification; and (5) prefabricating the modified heat insulation sleeve gel, and conducting drying and demolding to obtain the aerogel heat insulation sleeve for the battery. The sleeve is uniformly formed, and the defects of non-uniform gum dipping, bending, cavities and the like are effectively avoided.