80results about How to "Reduced chance of reaction" patented technology

A method for diffusely distributing a micro-nano particle reinforced phase in a composite material is characterized in that the method comprises the following steps: 1, ball-milling the micro-nano particle reinforced phase and matrix powder by adopting a mechanical ball-milling process in order to improve the wettability of the micro-nano particle enhanced wetting phase and a metal melt; 2, melting the metal melt, adding the molten metal melt to the ball-milled mixed powder, and processing the obtained melt by utilizing an ultrasonic field or an ultrasonic and electromagnetic compound fieldt; and 3, carrying out cooling molding or casting molding to prepared a micro-nano particle reinforced phase diffusely distributed metal matrix composite material. The method realizes the diffusive distribution of one or more of ceramic particles of SiC, WC, Al4C3, B4C, ZrB2, TiB, Al2O3 and AlN in metal materials of aluminum alloy, magnesium alloy and the like, and the high-quality metal matrix composite material with good compactness and uniform performances can be obtained through the method.

The invention discloses a total-nutritional formula milk powder, comprising the following components: 15-60% of concentrated whey protein powder, 18-25% of grease substances, 5-25% of desalted whey powder, 0-21% of carbohydrate, 2-12% of dietary fiber prebiotics substances, 0.95-1.4% of compound mineral substances, 0.25-0.45% of multi-vitamins, 0.05-0.10% of choline and 0.035-0.068% of amino acid substances; the preparation method comprises the steps: (1) mixing the concentrated whey protein powder, the desalted whey powder, the carbohydrate, the prebiotics, the choline, the amino acids and water to obtain a solution A; (2) mixing grease and the solution A to obtain a solution B; (3) mixing the multi-vitamins with water to obtain a solution C; (4) mixing the solution C and the solution B to obtain a solution D; (4) dissolving multi-vitamins in water to obtain a solution E; (6) mixing the solution E and the solution D to obtain a solution F; (7) sterilizing, concentrating and drying.

The invention discloses a method for preparing micro-capsulized superfine red phosphorus, boiling the superfine red phosphorus with vitriol, sodium cyanide solution and sodium hydroxide solution, separately, filtering, eliminating impurities, and drying, and storing by sealing; blending and dissolve metal compound, depositing with ammonia, centrifuging and adding water to dilute, raising temperature, dropping in aluminum nitrate, vitriol or HCl and making metal hydroxide sol; mixing propylene acylamide monomers and N, Ní»-methylene dipropylene acylamide with ammonium persulphate, raising temperature and reacting to form high molecular network gel; adding the high molecular network gel into the metal hydroxide sol, raising the temperature and reacting to form high molecular network gel of metal hydroxide, mixing the high molecular network gel of metal hydroxide with the processed superfine red phosphorus, blending and placing still so that the sol takes the red phosphorus as the center to make surface absorption to form gel and coating a layer of colloid membrane on the red phosphorus surface, so as to obtain the micro-capsulized superfine red phosphorus. The advantages of the invention: it improves the stability, invariability and surface activity of the red phosphorus, improving processing property.

The invention relates to a preparation method of a material of a negative electrode of a lithium ion battery, and belongs to the technical field of lithium ion batteries. The method includes the following steps of making graphite, oxidizing agent and organic acid react to obtain intercalated graphite, adding the intercalated graphite to a NaOH solution, and conducting soaking, washing, smashing and spheroidizing to obtain the material. According to the material of the negative electrode of the lithium ion battery, the intercalated graphite is processed through a soaking method, non-graphitic carbon and surface impurities on surfaces of the graphite are reduced, lithium ions consumed by irreversible carbon are reduced, and then the primary charging and discharging efficiency of the graphite is improved.

The invention belongs to the technical field of isocyanate curing agents, and discloses a rapidly-dried water-dispersible isocyanate curing agent composition and a preparation method thereof. The rapidly-dried water-dispersible isocyanate curing agent composition disclosed by the invention comprises the following two parts: 50-95 parts by mass of a hydrophilically modified aliphatic polyisocyanatepart and 5-50 parts by mass of a non-hydrophilically modified aromatic polyisocyanate part. After emulsification in a water system, the non-hydrophilically modified aromatic polyisocyanate is partially wrapped by the hydrophilically modified aliphatic polyisocyanate, so that long usable time can be kept in a water phase. After water of coating construction is volatilized, the drying speed is greatly improved, and a long usable time is achieved while rapid drying is realized. The problem that an application is limited due to the fact that hydrophilically modified aliphatic polyisocyanate is fast in drying speed but very short in usable time and hydrophilically modified aliphatic polyisocyanate is slow in curing speed is solved.

The invention relates to the technical field of building materials, in particular to a material for manufacturing a modified phenolic fireproofing insulation board and a preparation method thereof. The material for manufacturing the modified phenolic fireproofing insulation board comprises the following components in part by weight: 100 parts of modified phenolic resin, 2 to 4 parts of surfactant, 5 to 7 parts of foaming agent and 8 to 10 parts of curing agent. Due to the adoption of the technical scheme, the free phenol of the material is 0.09 percent, the free formaldehyde is less than 0.1 percent, the release amount of the formaldehyde is reduced obviously, and the physical and chemical properties of the material have no obvious difference compared with those of phenolic foam prepared under the normal condition, so the material can be applied to interior wall construction (interior wall heat-insulating systems) of buildings.

The invention discloses a method for preparing copper-tungsten alloy doped graphene. The method comprises the following steps: uniformly and quantitatively depositing a layer of copper on the surfaceof tungsten powder, and modifying the surface state of copper-plated tungsten powder and graphene respectively with PVA and PVP; sufficiently stirring in a liquid medium to sufficiently mix the copper-plated tungsten powder and graphene, and performing cold-press molding and hog-press sintering to obtain the graphene doped copper-tungsten alloy. The method can be used for improving the wetting performance of the sintering process, and the chemical, electrical, thermal and other performance of the alloy prepared by the method are greatly improved in comparison with those of alloy prepared by atraditional method, the vacuum ablation performance is promoted when the alloy is applied to an electrical contact, the service life of the contact is prolonged, and the ablation can be more uniform.

The invention relates to a method for leaching bauxite ore pulp, in particular to a method for leaching bauxite ore pulp during aluminium oxide production by a Bayer process. The method is characterized in that (1) the bauxite ore pulp is subject to intensifying pre-desilication; and (2) the ore pulp after intensifying pre-desilication is preheated in a first preheating pipeline, then the ore pulp is introduced into a heat preservation reactor to react and then is pumped into a second preheating pipeline to be heated, and then the ore pulp is introduced into the heat preservation reactor to react and then is introduced into a heating pipeline to be heated to leaching temperature, thus completing the leaching process. In the method provided by the invention, the high temperature intensifying pre-desilication process with longer reaction time is adopted, thus the pre-desilication efficiency of the ore pulp is improved; and meanwhile retention reactors are arranged in the pipeline preheating process of the ore pulp after pre-desilication by sections, so that mineral containing silicon and mineral containing titanium fully react in the retention reactors and the probability of precipitation from follow-up heat exchange surface is reduced, thus slowing down scabbing in the preheating process of the ore pulp.

The invention relates to a carbon raw material for a carbon composite refractory material and a preparation method thereof. The technical scheme comprises the following steps: firstly uniformly filling the bottom of a graphite crucible with a monatomic silicon powder, uniformly coating the monatomic silicon powder with graphite, carrying out thermal insulation at 1000-1400 DEG C in the atmosphere of argon or nitrogen for 1-4 hours, and taking out a substance which covers the monatomic silicon powder so as to prepare the carbon raw material for the carbon composite refractory material, wherein graphite is one of expandable graphite and graphene, and mass ratio of graphite to the monatomic silicon powder is (0.01-0.9):1. By adjusting the mass ratio of graphite to the monatomic silicon powder, in-situ preparation of different numbers and sizes of silicon carbide whiskers is realized on the edge of graphite. The prepared carbon raw material for the carbon composite refractory material has excellent resistance to oxidation, good dispersibility and excellent mechanical properties, is used in a carbon composite refractory material, and can be used to raise overall performance of a carbon composite refractory material and especially enhance mechanical properties and oxidation resistance of the carbon composite refractory material.

The invention relates to a preparation method of polyester resin having high hydroxy value. Raw materials of the invention comprise polybasic acid, polyol and diluent; the invention is characterized in that: the esterification polymerization of the polybasic acid and the polyol is completed through the method of multistep feeding so as to obtain the polyester resin with solid content of 70-80 percent in mass, hydroxy value of 3.5-5.5 percent and viscosity of 1500-8000cm<2>/s; the resin yielded is employed as crosslinking agent after being added with HDI biuret and HDI trimer to prepare aviation coatings, which is characterized by high solid content, good wettability to pigments, excellent environmental protection, weatherability, impact resistance and chemical resistance and so on.

The invention discloses a preparation method and a material using standards of a slate alkali reactivity restraining addition agent (FLSR-I). The addition agent is composed of mixing materials, ganister sands, nanometer SiO2, triethanolamine, a high-efficient plasticizing agent and an air entraining agent, the preparation method comprises accurately weighting dosage of the mixing materials, the ganister sands, the nanometer SiO2, the triethanolamine, the high-efficient plasticizing agent and the air entraining agent in proportion during preparation; sufficiently blending the mixing materials,the ganister sands, the nanometer SiO2, the high-efficient plasticizing agent and the air entraining agent, and manufacturing end products of the restraining addition agent by blending with the triethanolamine; and mixing in preparation of alkali reactive aggregate concrete in carious grades in proportion. The preparation method can effectively restrain reaction of slate alkali aggregate with expansion ratio between 0.2% to 0.5% and is obvious in restraining effect, simple and convenient in using method and free of needs of special construction control, thereby being capable of greatly lowering engineering using materials and transportation cost, and expanding material selecting range of the engineering using materials simultaneously.

The invention belongs to the technical field of waterborne epoxy resin, and particularly relates to a reactive emulsifier, waterborne epoxy resin emulsion, preparation and application. Phenolic aldehyde amine generated by condensation reaction of cardanol, paraformaldehyde and micromolecular polyamine reacts with polyethylene glycol diglycidyl ether to obtain the reaction type emulsifier being ofan "amine-polyoxyethylene ether-amine" structure, which is terminated by the aldehyde group of the cardanol and has hydrophilic middle chain sections; then mixing the reactive emulsifier with water toform a nano-scale emulsion, and mixing the nano-scale emulsion with epoxy resin at a high speed to obtain the water-borne epoxy resin emulsion. The method is simple in technological process, safe tooperate, mild in reaction and low in production cost. The preparation method is simple and the prepared reactive emulsifier is good in emulsifying effect, so that the water-borne epoxy resin emulsionwith good stability is obtained under the condition that few hydrophilic components are introduced. The water-borne epoxy resin emulsion has excellent mechanical property, adhesion property, water resistance and corrosion resistance when used as a water-borne coating.

The invention discloses a ceramic riser neck and sand mould structure capable of reducing defects of a high-nickle nodular iron reaction layer. The ceramic riser neck and sand mould structure comprises a wet mould lower sand mould, a wet mould upper sand mould, a casting mould cavity formed in the interface of the wet mould lower sand mould and the wet mould upper sand mould and a cladding assembly arranged in the casting mould cavity and further comprises a casting assembly, wherein one end of the casting assembly is positioned at the interface of the wet mould lower sand mould and the wet mould upper sand mould and communicates with the casting mould cavity and a cladding mould cavity; the other end of the casting assembly stretches out of the wet mould upper sand mould; and the claddingassembly comprises a cladding shell mould, a cladding sand core and a heat insulating riser. According to the ceramic riser neck and sand mould structure, on the one hand, during pouring, wet mould sand moulds, a precoated sand cladding shell mould, a cladding sand core and a heat insulating riser sleeve react with iron liquid to generate plenty of turbulent flow oxidized gas, and the turbulent flow oxidized gas can be conveniently discharged out of a second exhausting rod to reduce the reaction probability of gas and Mg in the iron liquid; and on the other hand, a ceramic riser neck is arranged at the bottom of the heat insulating riser to prevent influence of the turbulent flow oxidized gas to nodularization of casting at the riser neck, so that generation of defects of the casting reaction layer at the high-nickle nodular iron riser neck is effectively reduced.

The invention discloses a method for preparing Y2Ce2O7 transition layer thin film for superconduction coatings. The method includes the following steps: acetic acid yttrium, a first organic addition agent and methyl alcohol are mixed and blended to obtain a clear yttrium-contained solution; cerous nitrate, acetylacetone and propionic acid are mixed to obtain a clear cerium-contained solution; the obtained yttrium-contained solution and the obtained cerium-contained solution are mixed to obtain a first mixed solution, and methyl alcohol is added into the first mixed solution to obtain a precursor solution of the Y2Ce2O7 transition layer thin film; the Y2Ce2O7 transition layer thin film is coated on flexible nickel-tungsten alloy base bands through the adoption of the precursor solution of the Y2Ce2O7 transition layer thin film; after drying is conducted and 180 nm-250 nm ultraviolet irradiation is carried out, heat treatment is carried out in a first protective atmosphere, cooling is carried out in a second protective atmosphere, and the Y2Ce2O7 transition layer thin film is obtained from corresponding base sheets or the corresponding base bands. The method overcomes the defects that existing transition layer thin film is easy to crack, the surface is rough, and the texture degree is poor; YBCO superconduction thin film prepared on the basis of the transition layer is free of impurity phases, the good c-axis texture is achieved, and the application requirement of high temperature superconductor coating conductors is met.