121results about How to "Good anti-sedimentation" patented technology

The invention provides ceramic slurry for photo-curing 3D printing. The slurry is prepared from the following components: ceramic powder, a dispersant, an acrylate monomer combination, an organic aidand a photoinitiator, wherein the acrylate monomer combination comprises at least two acrylate monomers, and the weight ratio of the acrylate monomer combination to the ceramic powder is 0.14-0.175; the weight of the dispersing agent is 0.05%-5% of the weight of the ceramic powder; the weight ratio of the organic aid to the acrylate monomer combination is 0.1-0.5; the weight ratio of the photoinitiator to the acrylate monomer is 0.002-0.01. The ceramic slurry has the advantages of high solid content, extremely low viscosity, excellent sedimentation resistance and the like.

The invention provides an addition-type organic silicon pouring sealant and a preparation method thereof. The pouring sealant is prepared from a component A and a component B in parts by weight, wherein the component A comprises the following raw materials in parts by weight: 100 parts of vinyl silicone oil, 0-100 parts of dimethyl silicone oil, 1-50 parts of hydrogen-containing silicone oil, 20-250 parts of aluminum hydroxide, 0-200 parts of heat conduction fillers, 1-50 parts of nano-calcium carbonate and 0.01-1 part of an inhibitor; and the component B comprises the following raw materialsin parts by weight: 100 parts of vinyl silicone oil, 0-100 parts of dimethyl silicone oil, 20-250 parts of aluminum hydroxide, 0-200 parts of heat conduction fillers, 1-50 parts of nano-calcium carbonate, 0.01-1 part of a platinum catalyst and 0-10 parts of color paste. Through the synergistic effect of the components, the pouring sealant is high in sedimentation resistance, thermal conductivity and flame retardance. The caking time is at least more than three months after the pouring sealant starts settling, the heat conductivity coefficient is 0.4-0.7 W.m<-1>.k<-1>, and the flame retardant rating reaches V-0.

The invention discloses preparation methods of illite / montmorillonite clay nanometer slurry and illite / montmorillonite clay nanometer powder and belongs to the field of development and preparation of nanometer materials. The preparation method of the illite / montmorillonite clay nanometer powder comprises the following steps: (1) mechanically breaking natural illite / montmorillonite clay mineral; (2) soaking in water so as to obtain illite / montmorillonite clay slurry; (3) adjusting the pH value of the illite / montmorillonite clay slurry, puddling and dispersing; (4) sieving the puddled and dispersed slurry by using a 50-mesh sieve; (5) removing iron from the slurry; (6) chemically bleaching the slurry; (7) grinding the bleached slurry by adopting a high-energy density stirred mill so as to obtain nanometer slurry; (8) adding a dispersing agent to the nanometer slurry to carry out dispersing treatment; (9) adding a modifying agent to the slurry to carry out swelling treatment; (10) evaporating and drying; and (11) carrying out mechanical pulverization so as to obtain the illite / montmorillonite clay nanometer powder in the end. The illite / montmorillonite clay nanometer powder prepared by the method can reach the nanoscale and has good powder uniformity and dispersity.

The invention relates to the technical field of preparation of high molecular materials, particularly relates to halogen-free flame-retardant unsaturated polyester resin and a preparation method of the halogen-free flame-retardant unsaturated polyester resin. The halogen-free flame-retardant unsaturated polyester resin is prepared by the following steps: by esterification and polycondensation of organic polyatomic alcohol, saturated or unsaturated polybasic acid or acid anhydride, and reactive flame retardant, a polymer is formed; and the polymer is dissolved in styrene containing polymerization inhibitor and then mixed with additive flame retardant. The advantages are as follows: (1) the halogen-free flame-retardant unsaturated polyester resin consists of materials with low price and the preparation cost is low; (2) combing the comprehensive effects of the reactive flame retardant and the additive flame retardant, the polyester resin is superior to similar products in flame retarding effect in the market; and (3) the product does not contain halogen and is low in smoke and toxicity, and excellent in constructability and settlement resistance. The halogen-free flame-retardant unsaturated polyester resin and the composite of the resin can be broadly applied to such products with high requirement for flame-retardant property as building materials, automobile parts and the like and especially applicable to such glass fiber reinforced plastic products with low-smoke and flame-retardant requirements as hand layup passenger trains.

The invention discloses a high-performance magneto-rheological fluid, which comprises the following materials in percentage by weight of the magneto-rheological fluid: 50 to 80 percent of mixed magnetic granules of nano-scale carbonyl iron powder and carbonyl iron powder, 10 to 40 percent of carrier liquid, 0.5 to 2 percent of surfactant, 0.5 to 2 percent of thixotropic agent, 0.5 to 2 percent of antioxidant, 0.5 to 2 percent of solid lubricant, and 0.5 to 2 percent of dispersant. The high-performance magneto-rheological fluid of the invention has good anti-settling stability; and after the magneto-rheological fluid is stood for 1 year, the magneto-rheological fluid still has good stability and anti-settling property by observing the stability thereof. Meanwhile, the shear yield stress of the magneto-rheological fluid is obviously improved, and the shear yield stress of the high-performance magneto-rheological fluid can reach 60 kPa under an external magnetic field (1T).

The invention provides magnetorheological fluid comprising macromolecular composite magnetic powder and a preparation method thereof, and belongs to the technical field of magnetic materials and functional materials. The magnetorheological fluid comprises the composite magnetic powder, carrier liquid and a thixotropic agent, wherein the composite magnetic powder is the magnetic powder coated with polyether sulphone macromolecules. The preparation method of the magnetorheological fluid comprises the following preparation steps: firstly preparing the composite magnetic powder by using a solvent evaporation drying method, then mixing the carrier liquid and the thixotropic agent by stirring, adding the composite magnetic powder, and preparing the uniformly dispersed magnetorheological fluid comprising the special engineering macromolecular composite magnetic powder by ultrasound and stirring. The preparation method of the magnetorheological fluid system is simple and convenient for large-scale production; and the special engineering macromolecules are used as coating materials of the ferromagnetic powder; the problems of sedimentation and oil resistance are solved; and the magnetorheological effect of the system is maintained at a very high level.

The invention relates to a delayed coagulation adhesive used for retard-bonded prestressed tendon, comprising the components: 100 parts by weight of bisphenol-A type epoxide resin, 20-80 parts by weight of reactive diluent dihydric alcohol diglycidyl ether, 5-20 parts by weight of non-activated thinner, 5-25 parts by weight of low molecular weight polyamide resin curing agent, 0.1-5 parts by weight of thixotropic agent, 50-100 parts by weight of cement and 50-100 parts by weight of calcium carbonate. After being processed by an outer pack PE extrusion device, the delayed coagulation adhesive has no phenomenon of drippage and can be still evenly coated and wrapped around a steel stranded wire.

The invention discloses an urban underground comprehensive steel pipe gallery which comprises box type pipe joints, wherein each box type pipe joint is formed by assembling unit plate sheets, and the box type pipe joints are assembled in the axial direction to form a box type pipe gallery; protrusions are arranged on the outer side and / or the inner side of each unit plate sheet, and openings are formed in the periphery of the cross section of each protrusion. Compared with a circular-section pipe gallery, the box type pipe gallery structure of the urban underground comprehensive steel pipe gallery increases the use ratio and the general net width and net height of the internal clearance, the height of the pipe gallery is significantly reduced under the condition of ensuring the same internal clearance space, and therefore the foundation excavation depth is decreased, and the civil engineering quantity is reduced; the bottom straight surface of the pipe gallery can be directly used as a pedestrian passage or a driving passage, so that the most important and the most difficult re-filling and the degree of compaction of a bottom wedge-shaped included angle when the circular-section pipe gallery is re-filled are achieved; the pipe gallery is in a semi-flexible structure, has a good anti-seismic property and good settlement resistant performance, can absorb the trace deformation, and is not easily crazed.

The invention discloses a preparation method and a usage method of a low-viscosity flame-retardant heat-conducting solvent-free polyurethane electronic-pouring sealant. The electronic-pouring sealant comprises a component A and a component B, wherein the component A is prepared by means of the following process: adding 100 parts of castor oil, 5 to 15 parts of flame retardant, 1 to 5 parts of high heat conductive insulation composite powder and 0.05 to 3 parts of an anti-foaming agent into a reaction kettle in parts by mass, performing uniform mixing and vacuum dehydration, then adding 0.05 to 0.3 part of a catalyst, and performing uniform mixing to obtain the component A; and the component B is liquefied diphenylmethylene diisocyanate. In the invention, a high heat conductive insulation composite powder heat conduction technology, a polyurethane in-situ polymerization self-flame-retardant technology and a thermal sensitive catalyst asynchronous catalysis technology are adopted, the product viscosity is smaller than 6000mPa.s, the heat conduction coefficient is greater than 1.85W / MK, the volume resistivity is greater than 4.2*10<12>omega.m, and the flame retardant property can be up to the American FMVSS302 standard.

The invention relates to a modular maritime floating island, comprising multiple welded all-steel-structure floating box modules, rubber mats and linking cables, wherein the floating box modules can be square modules and rectangular modules, or can also be hexagonal modules; each module is provided with an upper linking boss and a lower linking boss; every two adjacent floating box modules are linked by one cable; a floating box body of each floating box module is divided into an upper layer and a lower layer; the lower layers are respectively and internally provided with a watertight compartment; the upper layers are respectively provided with a working and living room; the lower layers and the upper layers are correspondingly communicated by through cross channels; the sides of the channels are respectively provided with a staircase communicated with the upper plane of a floating box. The modular maritime floating island has the beneficial effects that the floating boxes can be modularly and massively produced, and are applied to maritime combination for infinite extension; the floating island has a strong capability of resisting stormy wave, is small in immersion depth and can be berthed on the bank side of a shallow sea or in a lagoon in a floating way; after a plurality of power modules are combined, the floating island can be positioned in a deep sea in the floating way; the modules which cannot be restored due to damage can be sunken into the sea bottom by unfastening the cables; each floating box module is provided with an independent rainwater collector and an independent septic tank; therefore facilities such as a community, a greenhouse, an aquaculture net cage and an airport can be built on a large floating island.

The invention provides a two-component graphene heavy-duty anti-corrosive coating material, which comprises a component A and a component B, wherein the two-component graphene heavy-duty anti-corrosive coating material comprises the following components in percentage by weight based on 100% of the total weight of the component A: 0.2-2wt% of graphene; 10-30wt% of epoxy resin; 20-50wt% of zinc powder; 0.5-3wt% of a dispersant; 0.5-4wt% of an anti-settling agent; 0.2-1wt% of a defoaming agent; 0.2-2 wt% of a silane coupling agent; 0.3-2wt% of a thickener; 10-20wt% of a pigment filler; and 10-20wt% of a first solvent, wherein the zinc powder is a mixture of spherical zinc powder and flaky zinc powder; and the coating material comprises the following components in percentage by weight based on100% of the total weight of the component B: 50-75% of a curing agent; 1-5wt% of a curing accelerator; and 20-50wt% of a second solvent.

The invention discloses a preparation method of organobentonite modified with fatty acid amide. The method includes the following steps that bentonite, an alkyl trimethyl quaternary ammonium salt cationic surfactant with the carbon chain length of 12-16, an octadecyl trimethyl quaternary ammonium salt cationic surfactant, a fatty acid amide nonionic surfactant, ethyl alcohol and deionized water are mixed to form a mixture, then the mixture is subjected to an organizing reaction with primary organic modification or secondary organic modification, and the product is washed, centrifuged, dried and smashed to be prepared into organobentonite. Organobentonite produced with the method has a high colloidization rate in xylene and is good in settling resistance and small in particle size, wherein the colloid rate reaches 99% or above, and the scraper fineness is smaller than or equal to 10 micrometers and is uniform.

The invention discloses a synthesized pipe rack with a frame composite structure. The synthesized pipe rack comprises unit plate pieces positioned on the upper and lower surfaces, and side unit plate pieces positioned on two side surfaces; the unit plate pieces and the side unit plate pieces are combined and spliced to form unit pipe sections; the unit pipe sections are axially spliced to form the synthesized pipe rack; the unit plate pieces consist of plates, hollow second pipes positioned at two ends, and hollow first pipes positioned at the other two ends; the side unit plate pieces consist of plates, and hollow second pipes positioned at two ends; the second pipes are axial splicing ends of the unit pipe sections; and in splicing of the synthesized pipe rack, the first pipes form longitudinal beams of the synthesized pipe rack, and the adjacent second pipes are connected with each other to form a skeleton structure of the synthesized pipe rack. The longitudinal beams and the skeleton structure of the pipe rack bear main loads; a bridge steel web structure is formed to enhance the shearing resistance of the pipe rack, and is skillfully used; based on dual enhanced structures, the bearing capacity is greatly improved; and under the same filling height, wall plates with the structures are thinner, and materials are saved.

The invention provides a novel intelligent material composed of a porous magnetorheological elastomer and magnetorheological fluid, which comprises a non-magnetic polymer matrix, magnetic particles inthe magnetorheological elastomer, bubble pores, channels, non-magnetic liquid and magnetic particles in the non-magnetic liquid. The magnetic particles in the magnetorheological elastomer and the bubble pores are randomly or regularly distributed in the non-magnetic polymer matrix, the multiple bubble pores are connected through the channels, the non-magnetic fluid is located in the bubble poresand the channels, and magnetic particles in non-magnetic fluid are distributed in the interior of the non-magnetic fluid. Randomly distributed bubble pores are produced by physical or chemical foamingmethods, and chain-like regularly distributed bubble pores are formed by mold forming or augmentation manufacturing (3D). The intelligent material manufactured by the invention has good vibration damping and energy absorption performance, wide adjustment range of stiffness and damping, good controllability, strong designability, stable performance and settlement resistance, and has very broad application prospect.

The invention belongs to the technical field of energy storage fuel and particularly relates to high-energy nano energy storage fuel capable of meeting the use of a missile weapon and a preparation method thereof. The energy storage fuel comprises the following components in percentage by weight: 3-30 percent of nano Al powder, 5-90 percent of liquid hydrocarbon fuel and 7-90 percent of carborane,wherein the nano Al powder is spherical and has an average particle size of less than 150 nm and an active Al content of higher than 90 percent; the liquid hydrocarbon fuel is a petroleum rectification product or synthetic hydrocarbon or two types of compositions. The nano energy storage fuel provided by the invention is high in energy, excellent ignition and combustion performances, simple in preparation method and excellent in sedimentation resistance.

The invention discloses a fire retardant coating of a super thin steel structure and a preparation method thereof. The fire retardant coating is prepared from the following raw materials in parts by weight: 30 to 40 parts of amino resin, 10 to 20 parts of megilp, 20 to 30 parts of APP (ammonium polyphosphate), 2 to 10 parts of titanium dioxide, 5 to 12 parts of melamine, 5 to 12 parts of pentaerythritol, 0.5 to 1.5 parts of bentonite, and 2 to 4 parts of chlorcosane. The related indexes of the fire retardant coating of a super thin steel structure meet the national standard, the toxic gas release does not exist in a work process, safety and environmental protection are realized, and the fire retardant coating can be widely used in various steel construction, two data of the surface dry time and the fire endurance thereof are superior to the national standard, the effect is obvious, and the great market value is achieved.

The invention relates to a foundation anti-settling structure and a construction method. The foundation anti-settling structure comprises a foundation pit dug in the ground, wherein an anti-settling concrete layer is fixedly laid on the inner bottom wall of the foundation pit, a gravel layer is laid on the upper surface of the anti-settling concrete layer, a concrete lime soil layer is laid on theupper surface of the gravel layer, and a fixed column is inserted in the upper portion of the concrete lime soil layer, the bottom end of the fixed column sequentially penetrate through the concretelime soil layer, the gravel layer and the anti-settling concrete layer and is inserted into the ground, a reinforcement cage net is placed on the upper surface of the concrete lime soil layer, concrete is poured into the reinforcement cage net, the foundation is fixed to the upper surface of the reinforcement cage net, and a plurality of anti-settling devices are arranged below the foundation andused for supporting the foundation. The effect of effectively preventing the foundation from settling is achieved.

The invention relates to the technical field of optical precision processing and manufacturing, and particularly discloses a water-based magnetic auxiliary polishing liquid, a preparation method thereof and a magnetorheological polishing liquid. The water-based magnetic auxiliary polishing liquid comprises the following raw materials: in parts by weight, 80-90 parts of deionized water, 0.5-1 partof a thickener, 0.5-1 part of a water-based corrosion inhibitor, 1-2 parts of a dispersant, 2-3 parts of an emulsifier, 0.5-1 part of a pH adjuster, 0.01-0.02 part of an antifoaming agent, 0.05-0.1 part of a preservative and 5-10 parts of polishing powder. Through the water-based magnetic auxiliary polishing liquid, the dispersion stability of the polishing powder particles can be ensured for a long time, and no corrosion to the magnetic powder medium is ensured during operation; and the preparation method of the water-based magnetic auxiliary polishing liquid has a simple process, and the obtained magnetic auxiliary polishing liquid has high polishing efficiency and high stability of material removal, and has the advantages of environmental protection, easy cleaning and circulation.

The invention discloses a ceramic 3D printing paste material and a preparation method thereof. According to the preparation method, the following components in percentage by mass are adopted: 15-20% of a photosensitive resin; wherein the photosensitive resin comprises a monofunctional monomer, a bifunctional monomer and a trifunctional monomer at a mass ratio of 1: 2: 1; the viscosity of the monofunctional monomer is less than 15 pa*s; the viscosity of the bifunctional monomer is less than 20 pa*s; the viscosity of the trifunctional monomer is less than 200 pa*s; 80% to 85% of ceramic powder;a dispersant with a mass amount accounting for 1%-4% of the mass amount of the ceramic powder; 0.1% to 1% of a defoamer; a photoinitiator with a mass amount accounting for 0.1% to 0.5% of the mass amount of the photosensitive resin; and 0.5% to 5% of a thickening agent. The ceramic 3D printing paste material is obtained by the preparation method, has good dispersion uniformity and excellent anti-settling performance.

The invention relates to a high speed boat, and belongs to the technical field of shipping. A boat body of the high speed boat is provided with a fore peak, a passenger compartment and an engine room from head to tail. The dead rise angle of the fore peak is 38-42 degrees. The cross section of the passenger compartment is in a folded angle form, and the outline of the cross section of the passenger compartment is formed by sequentially connecting two lateral sides of two broadsides of the boat body, a bottom side, a first folded side and a second folded side, the bottom edge, the first folded side and the second folded side are located at the bottom of the boat body and arranged sequentially from bottom to top, the bottom side and the second folded side are horizontally arranged at the bottom of the boat body, the bottom side is arranged in the center of the bottom of the boat body, and the second folded side and the lateral sides are adjacent and arranged at the sides of the bottom of the boat body. The included angle between the first folded side and the bottom side and the included angle between the first folded side and the second folded side are both 150-160 degrees. The included angles between the second folded side and the lateral sides are 100-110 degrees. The high speed boat has the advantage of being high in speed.

The invention discloses an anti-settlement device for a foundation of an additionally-mounted elevator and a construction method thereof. The anti-settlement device comprises anti-settlement piles, ananti-settlement box, a rubber box, a rubber cover plate, an anti-settlement cover plate, an anti-settlement column, spring columns, elastic fillers, first connecting pieces and second connecting pieces. The structure is simple, very common materials are adopted, the construction cost and the material cost are low, construction is fast, normal life needs of people are not affected, practicality ishigh, and popularizing is easy; connecting between an elevator shaft and the elevator foundation are well reinforced, when the elevator shaft moves, the quite good buffering effect is achieved, the cooperative work effect is generated between the shaft and the foundation, the good using effect can be achieved whether lateral moving or vertical moving, the quite good reinforcing effect is achieved, and the traveling safety of people is guaranteed.

The invention provides a subgrade anti-settlement device and an installation method thereof. The device consists of a plurality of hollow round pipes, two constraining baffles and a plurality of pre-tensioning bolts; the two constraining baffles are correspondingly provided with a plurality of round through holes which are uniformly distributed and used for mounting the pre-tensioning bolts; the hollow round pipes are sleeved on the pre-tensioning bolts; and the two ends of the pre-tensioning bolts are inserted in the corresponding round through holes of the constraining baffle and the hollow round pipes are fastened between the two constraining baffles by nuts. The subgrade anti-settlement device has the advantages of simple structure, low cost, good anti-settlement performance, and can effectively prevents secondary jumping, and the like.

The invention discloses an ultrathin weather-resistant fire retardant coating for a steel structure. The fire retardant coating comprises the following components: 24-30 parts of base resin, 17-23 parts of an intumescent flame retardant system, 8-15 parts of filler and pigment, 6-11 parts of auxiliaries, 17-22 parts of a solvent, 4-8 parts of modified nano-aluminum hydroxide and 1-3 parts of a plasticizer, wherein the intumescent system comprises components in parts by mass as follows: 8-10 parts of a dehydration catalyst, 5-7 parts of a charring agent and 2-4 parts of a foaming agent. The invention further designs a preparation technology of the ultrathin weather-resistant fire retardant coating for the steel structure. The preparation technology is simple, dense smoke and poison gas are not produced in the preparation process, and the prepared fire retardant coating has the advantages of environmental protection, ultrathin performance, weather resistance, fire retardance, durability, good fire retardant effect, low cost and good decoration performance.

The invention discloses a high-temperature-resistant high-permeability wave absorbing sheet and a preparation method thereof. The wave absorbing sheet comprises, by weight, 100 parts of soft magneticalloy powder, 10-20 parts of an adhesive, 0.5-3 parts of a vulcanizing agent, 1-3 parts of a dispersant and 150-200 parts of an organic solvent. The wave absorbing sheet has high magnetic conductivityand high-temperature resistance, can be stably used for at 120 DEG C a long time, and has a longer service life than wave absorbing sheets which can only be used at 80 DEG C in the prior art.

The invention discloses an adhesive for a louver grinding disc. The adhesive is prepared by mixing a component A and a component B, wherein the component A is prepared from the following components: titanium hydroxide emulsion, sulfuric acid, compound rare earth, an organic solvent, a flame retardant, a foaming agent, pigment and filler, a rheological auxiliary agent and a dehydration catalyst; the component B is prepared from the following components: polypropylene carbonate dihydric alcohol, diisocyanate, acrylic resin, epoxy resin, a thickener, a de-foaming agent, a flatting agent, an anti-skinning agent, a curing agent and a coupling agent. The invention further designs a preparation method of the adhesive for the louver grinding disc; the preparation method provided by the invention is simple and feasible; the prepared adhesive has good flame-retarding and heat-resisting properties and has long service life.

The invention relates to a method for manufacturing and storing a corneal injury scar-free repairing device. Specially-prepared amnion elements are settled or bonded in or on the surfaces of various biological or synthetic attaching devices such as the invisible contact lens through the novel carrier controlled release technology and the biological tissue engineering technology so as to form the corneal or conjunctiva injury scar-free repairing device. At the early stage of the corneal or conjunctiva injury, the affected corneal tissue or the affected conjunctiva tissue is covered with the amnion elements of the corneal or conjunctiva injury scar-free repairing device, the amnion elements, such as the necessary cell growth factors, the tissue repair factors and protease inhibitors, of the corneal or conjunctiva injury scar-free repairing device are diffused to the affected corneal tissue or the affected conjunctiva tissue due to the special superfine structure of an amnion basilar membrane and the stem cell characteristic of amniotic epithelial cells, and therefore growth of epithelial cells of the corneal or the conjunctiva is promoted, the affected corneal tissue or the affected conjunctiva tissue is stimulated, regulated and controlled to heal orderly, and less scars are formed on the affected corneal tissue or the affected conjunctiva tissue.

The invention relates to heat-conducting sticking silica gel. The heat-conducting sticking silica gel is prepared from the following raw materials in parts by weight: 98 to 99 parts of a matrix, 0.7 to 1.2 parts of a cross-linking agent, 0.27 to 0.6 part of an adhesive, 0.01 to 0.1 part of an inhibitor and 0.02 to 0.1 part of a catalyst, wherein the matrix is prepared by sequentially adding methyl vinyl silicone oil, a diluting agent and heat-conducting filling into a kneading machine at the weight ratio of (19 to 21) to (4 to 6) to (73 to 75), wherein the heat-conducting filling needs to be added for a plurality of times; the heat-conducting filling is stirred for a period of time at a low speed; after the powder is completely mixed into the silicone oil, the rotary speed of the kneading machine is improved; meanwhile, a heating function is started and the temperature is set to be 150 DEG C; after the temperature is reached, the materials are mixed for 2h; finally, a mixture is stirred for 10min under the vacuum degree of 0.8MPa; the matrix is poured into a sealing bucket when the matrix is hot, and then the sealing bucket is sealed and a product is preserved for later use.

The invention discloses a high-performance back surface field paste for a crystalline silicon solar cell, belonging to the technical field of back surface field pastes of solar cells. The invention provides a high-performance back surface field aluminum paste for a crystalline silicon solar cell. The aluminum paste is free of lead and good in screening performance, a silicon wafer has small warping degree after being sintered, an aluminum film is free of an aluminum bead and an aluminum lump and good in compactness and electrical conductivity, the aluminum film and a cell slice are highly adhered, the cell slice has high conversion efficiency, and meanwhile the aluminum film has good stability. The aluminum paste comprises the following components in parts by weight: 65-75 parts of spherical metal aluminum powder, 20-30 parts of an organic carrier, 1-5 parts of bismuth glass powder, 0.1-1 part of metal oxide and 1-3 parts of aluminum-silicon alloy powder, wherein the purity of the spherical metal aluminum powder is greater than 99.8%; the organic carrier comprises the following components in parts by weight: 30-50 parts of terpilenol, 2-7 parts of ethyl cellulose, 0.1-5 parts of high molecular resin, 1-7 parts of a dispersing agent and 25-70 parts of an additive. The aluminum paste is mainly applied to the back surface field pastes of the solar cells.

The invention discloses a method for performing fiber surface modification on basalt fiber by using silicon carbon black, and belongs to the technical field of fiber modification. Coating treatment and attachment of adsorbing particles are continuously carried out in the same step, so that the conventional processes of drying and crushing the particles and then preparing a suspension are omitted,an anti-settling step using an emulsifier and the like are omitted, micro settlement is resisted through flowing, and a better adsorbing effect is obtained. According to the method, the silicon carbonblack is treated by a silane coupling agent first and then the treated silicon carbon black particles are attached to the surface of the basalt fiber, so that the roughness of the fiber surface is enhanced and the wettability of the fiber is improved while the original strength property of the fiber is not changed, and thus a better interfacial bonding force exists between the basalt fiber and abase material and application of a basalt fiber composite material is met.

The invention discloses and provides a lubricating oil anti-wear additive based on fewer-layer graphene nanoplatelets and a preparation method thereof. The lubricating oil anti-wear additive has good stability and precipitation resistance and can effectively improve wear resistance and extreme pressure resistance. The lubricating oil anti-wear additive based on the fewer-layer graphene nanoplatelets is prepared from, by weight, 0.0001-5% of fewer-layer graphene nanoplatelets, 0.001-5% of a wetting agent, 0.0-0.5% of an emulsifying agent, 3-5% of a dispersing agent, 3-5% of a clearing agent, 1-2.5% of a pour point reducer and the balance base oil. The lubricating oil anti-wear additive is applicable to the field of production and application of lubricating oil additives.