159results about How to "Improve flexural strength" patented technology

The invention discloses a fiber foamed concrete and a preparation method thereof. The fiber foamed concrete comprises the following raw materials in parts by weight: 5290 parts of cement, 4965 parts of water, 1.361 part of foaming solution, 1.2964 part of fly ash and 10 parts of fiber. The preparation method comprises the following steps: proportionally weighing the components; sequentially adding the cement and fly ash into a stirrer, proportionally weighing the water, uniformly stirring the mixture by the stirrer, and adding the fiber; preparing and adding the foaming solution; gradually adding the foam into the mixture, and continuously stirring until all the components are uniformly mixed; pouring the mixture into a mold on which lubricating oil is brushed, and curing in a curing chamber; after 24 hours, removing the mold; and respectively curing for 3 days, 7 days and 28 days for experimental detection. The fiber foamed concrete has the advantages of favorable thermal insulation property, favorable compression resistance and favorable bending resistance, and is applicable to a railway bed strengthening layer.

The invention discloses a low-dielectric low-loss high-strength borosilicate glass ceramic composite material and a preparation method thereof, and belongs to the technical field of borosilicate glass ceramic composites.The low-dielectric low-loss high-strength borosilicate glass ceramic composite material is prepared from, by weight, 70% of low-alkali borosilicate glass ceramics with the low borosilicate ratio, 29% of Al2O3 and 1% of Bi2O3. The preparation method comprises the following steps: preparing low-alkali borosilicate glass ceramics with a high borosilicate ratio, melting the low-alkali borosilicate glass ceramics with the high borosilicate ratio and amorphous SiO2 at a set temperature to obtain the required low-alkali borosilicate glass ceramics with the low borosilicate ratio, and finally mixing and ball-milling the crushed and ground low-alkali borosilicate glass ceramics with Al2O3 and Bi2O3 to obtain the low-alkali borosilicate glass ceramics with the low borosilicate ratio. And finally, the borosilicate glass ceramic composite material is sintered at the temperature of 880-900 DEG C. The borosilicate microcrystalline glass ceramic composite material is low in dielectric, low in loss and high in strength.

The invention discloses a wet-type large-surface repairing material and a preparation method thereof. The repairing material comprises the following components in percentage by mass: 20-30% of sintered magnesia coarse sand with the particle size of 10-5 mm and the mass percentage of 20-30%; the particle size of the sintered magnesia fine sand is 5-3mm, and the mass percent of the sintered magnesia fine sand is 5-15wt%; the grain size of the forsterite is 3-1 mm, and the mass percentage of the forsterite is 15-25 wt%; the particle size of the medium-grade magnesia is not greater than 2mm, and the mass percent is 15-25wt%; the particle size of the medium-grade magnesia fine powder is 150-200 meshes, the mass percent of the medium-grade magnesia fine powder is 10-15 wt%, the particle size of the magnesium-calcium-iron sand fine powder is 150-200 meshes, and the mass percent of the magnesium-calcium-iron sand fine powder is 1-8 wt%; 10 to 14 wt% of modified asphalt; and 0.5 to 1.5 wt% of industrial white oil. The repairing material disclosed by the invention is low in cost, environment-friendly and economical, has relatively high breaking strength, and is particularly suitable for a large-surface repairing material of a schreyerite steelmaking converter.

According to the office desk with the desk leg hidden connecting structure, a positioning plate is completely embedded in a positioning groove of a desk leg, then a decorative plate covers the positioning plate, exposed connecting pieces are thoroughly eliminated through stacked assembly of the positioning plate and the decorative plate, the visual effect of seamless connection is achieved, the aesthetic requirement of high-end office furniture is met, and the service life of the office desk is prolonged. Besides, through cooperation of the positioning columns and the first positioning holes, rapid combination and assembly of plastic, metal, solid wood and other heterogeneous materials are achieved, triple breakthrough of functionality, attractiveness and economical efficiency is achieved through structural innovation of the technical system, and a solution capable of achieving mass production is provided for customized production of office furniture.

The invention relates to the field of hard alloy product production, in particular to a production method of a high-toughness and wear-resistant hard alloy. A production method of a high-toughness and wear-resistant hard alloy comprises the following steps that S1, raw materials including, by mass, 40%-45% of WC powder, 25%-35% of Fe powder, 3%-5% of Si powder, 0.95%-1.16% of C powder, 2.5%-3.2% of Ni powder, 9%-12% of Co powder, 1.75%-2.05% of Mo powder and 0.15%-0.3% of VC powder are taken, and the purities of all the powder components are all larger than 99%; s2, mixing the raw material powder in the step S1 with a ball milling medium according to a ratio, and mixing by adopting a wet ball milling process; s3, drying the slurry, and sieving to prepare granules; s4, pressing the granules into a hard alloy blank; s5, the hard alloy blank is sintered in a vacuum or low-pressure sintering furnace, and the sintering temperature is controlled to be 1180-1250 DEG C; and S6, after sintering is completed, a sintered body is cooled, precision machining is conducted according to requirements, and a product is obtained. The high toughness and wear resistance of the hard alloy material are remarkably improved.

This invention discloses a high-density, high-thermal-conductivity hot-pressed aluminum nitride substrate and its preparation method, belonging to the field of ceramic thermally conductive materials technology. The aluminum nitride substrate is composed of aluminum nitride powder and a composite sintering aid, the composite sintering aid being a fluoride, with a total addition amount of 2%-8% of the aluminum nitride powder mass. The aluminum nitride substrate has a multi-layer composite structure, including an upper dense layer, a middle stress buffer layer, and a lower dense layer. The porosity of the upper and lower dense layers is ≤0.3%, and the porosity of the middle stress buffer layer is 1%-5%. The preparation method includes steps such as raw material mixing, multi-layer molding, hot-pressing sintering, and diamond wire saw cutting. This invention achieves grain boundary purification through a pure fluoride composite aid system, combined with a multi-layer structure design to absorb cutting stress and thermal stress, resulting in a substrate density ≥99.5%, thermal conductivity ≥240W / (mK), and an ultra-thin substrate edge chipping rate ≤3%, while simultaneously reducing the sintering temperature and shortening the production cycle.

The invention belongs to the technical field of solid waste treatment and utilization, and particularly relates to modified manganese slag and application thereof in preparation of a cement material. The modified manganese slag disclosed by the invention is prepared by a method comprising the following steps: uniformly mixing maleic anhydride grafted polyethylene, epoxy group modified manganese slag, epoxy group modified nano alumina fiber and epoxy group modified basalt fiber, and then performing melt extrusion to obtain a polyethylene grafted manganese slag-polybasic fiber compound, and uniformly mixing the polyethylene grafted manganese slag-polybasic fiber compound and 5-chlorosulfonyl-2-hydroxybenzoic acid, and carrying out melt extrusion to obtain the modified manganese slag. The basalt fiber and the nano alumina fiber are combined with the manganese slag through chemical bonds and polyethylene long chains to form a compound, so that the combination stability and dispersion uniformity of the basalt fiber, the alumina fiber and the manganese slag can be improved, and the basalt fiber and the alumina fiber can play an anchoring role in a cement material; the mechanical strength and the low-temperature freezing resistance of the cement material are improved.

The utility model provides a comfortable back -carrying type hair dryer with damping structure, include: hair dryer body, hair dryer body one side is equipped with backplate support, backplate support one side fixed mounting has damping component, and damping component includes U shaped elastic sheet, and U shaped elastic sheet fixed mounting is in backplate support one side, and U shaped elastic sheet one side surface is equipped with two empty grooves, and two empty grooves are all respectively pasted with silica gel block in, and silica gel block one side is respectively pasted with soft cotton board. When the user carries the hair dryer body through the shoulder strap, the body pressure is passed to the silica gel block through the soft cotton board, and the high elasticity deformation of silica gel absorbs high frequency fine vibration, and the wave plate is located between two soft cotton boards, and the wave structure of the wave plate produces deformation when being pressed, and the dispersion pressure increases the buffer stroke, improves the comfort degree when the user is carrying.

The invention provides a modified epoxy resin water permeable brick and a preparation method thereof. The modified epoxy resin water permeable brick is prepared from the following raw materials in parts by weight: 95 to 105 parts of aggregate, 8 to 15 parts of modified epoxy resin, 1 to 3 parts of curing agent, 5 to 8 parts of composite filler, 0.1 to 0.3 part of exciting agent, 2 to 4 parts of self-repairing component and 1 to 3 parts of diluent. According to the water permeable brick, through the synergistic effect of the organic silicon modified epoxy resin and the special curing agent, the anti-aging performance of the material is improved. The introduced Si-O-Si bond can effectively resist the attack of ultraviolet photons; long-chain alkyl in the curing agent forms a compact physical barrier layer, so that oxygen and moisture permeation is greatly slowed down, the water permeable brick can effectively resist pulverization, yellowing and embrittlement in long-term outdoor use, the compressive strength and the water permeability coefficient of the water permeable brick can still keep an extremely high retention rate after long-term use, the service life is remarkably prolonged, and the water permeable brick is suitable for popularization and application. The industrial pain point that a traditional resin-based water permeable brick is easy to age is solved.

This invention provides a multi-scale corn stalk cellulose-reinforced cementitious material and its preparation method. The multi-scale corn stalk cellulose-reinforced cementitious material comprises multi-scale corn stalk cellulose and cement. The multi-scale corn stalk cellulose has both micron-fiber and nanofiber structures. The micron-fibers have a diameter of 1-5 μm and a length of 500-3000 μm, and the nanofiber structures are mainly distributed on the surface of the micron-fiber structures, with a diameter of 1-5 nm and a length of 100-2000 nm. The multi-scale corn stalk cellulose-reinforced cementitious material provided by this application exhibits higher flexural and compressive strengths (10-30% increase) than the control group cement, and has broad application prospects in the field of construction engineering.

The application provides an electric heating device for a strip steel heat treatment furnace, which comprises an electric heating radiation tube mechanism and an atmosphere protection cover mechanism, the electric heating radiation tube mechanism is horizontally suspended in the strip steel heat treatment furnace, one end of the electric heating radiation tube mechanism is fixed on a side wall of the strip steel heat treatment furnace, the end of the electric heating radiation tube mechanism is exposed to the strip steel heat treatment furnace, and the other end of the electric heating radiation tube mechanism extends into the strip steel heat treatment furnace, and the atmosphere protection cover mechanism covers the end of the electric heating radiation tube mechanism connected with the strip steel heat treatment furnace and is fixed on the wall of the strip steel heat treatment furnace, the electric heating device has the advantages of low cost, high temperature control precision, good energy-saving effect, long service life and low maintenance cost.

The utility model relates to a kind of high trapezoidal multi-hole high cavity reinforced structure wall pipe, including pipeline main body, reinforcing rib is formed with spiral winding in pipeline main body outer end face, it is hollow, and cross-sectional shape is set to trapezoidal;Reinforcing rib outer end face spiral winding is formed with reinforcing pipe, reinforcing pipe is hollow tubular structure, its cross-sectional shape is circular, the outer diameter of reinforcing pipe is not greater than the maximum width of reinforcing rib;Reinforcing frame is arranged in the cavity of reinforcing rib, and it is tightly arranged with the inner wall of reinforcing rib, corrugated pipe is arranged in reinforcing pipe, and it is tightly arranged with the inner wall of reinforcing pipe.Compared with the defect that existing circular reinforcing rib is prone to depression, cracking under asymmetric load, the structure wall pipe is designed through trapezoidal cross-section reinforcing rib, utilizes the advantage that trapezoidal structure stress dispersion is uniform, lateral pressure resistance is strong, efficiently transfers external force such as soil pressure, ground load to pipeline main body, avoids local stress concentration.

This utility model discloses a high-load-bearing machine tool base, including a top plate, a bottom plate, side plates, and supporting partition plates. The two ends of the top plate and the bottom plate are connected by the side plates. The side plates and the supporting partition plates are vertically arranged and perpendicular to each other. The supporting partition plates are evenly distributed between the top plate and the bottom plate along the length of the top plate. Each supporting partition plate includes an arc-shaped support part, a vertical support part, and an inclined support part. The two ends of the arc-shaped support part are connected to the side plates on both sides, respectively. The upper end of the vertical support part is connected to the top plate, and the lower end is connected to the bottom plate. The inclined support parts are located on both sides of the vertical support parts, with the upper end connected to the top plate and the lower end connected to the bottom plate. The inclined support parts gradually incline towards the vertical support parts from top to bottom. This utility model has a simple structure, is easy to manufacture, and has high structural strength, effectively improving the load-bearing capacity of the base.

The utility model discloses a near ceramic sample concrete drain pipe relates to drain pipe technical field, and this near ceramic sample concrete drain pipe, including pipe body, pipe body is the composite structure of carbon fiber silk, porous ceramic aggregate, ceramic powder filling piece and concrete filling piece, and pipe body surface is equipped with nanometer ceramic coating, and pipe body includes intermediate straight pipe, and socket and spigot of setting in the both ends of intermediate straight pipe and the annular connecting rib of setting in the outer wall of intermediate straight pipe, and socket end portion is equipped with outward extending dentate boss along the length direction, and the butt joint surface of socket inner wall is equipped with sealing washer, and the connecting rib end portion is equipped with dentate recess. The utility model sets up the pipe body of composite structure, and the carbon fiber silk that increases restrains crack propagation, and the pipe body is connected stably between, and the sealing effect is good, and the pipe body corrosion resistance improves, and the integral drain pipeline system that the pipe body body of subsection butt joint installation constitutes can be locally replaced, prolongs the overall life, and reduces maintenance cost.

The invention discloses a (Ti, W) C-AlCrCoNiMo high-entropy metal ceramic material as well as a preparation method and application thereof, and belongs to the technical field of metal ceramic materials. The invention provides a metal ceramic material which is prepared by taking (Ti, W) C ceramic as a matrix, adding Al, Cr, Co, Ni and Mo as a high-entropy alloy binding phase, carrying out two-step wet-dry composite ball milling process treatment and carrying out spark plasma coupling high-frequency induction sintering. The problem of segregation can be solved after two-step wet-dry composite ball milling process treatment, ideal pre-alloyed powder is obtained, the components are more uniform, the dispersity is better, and the composite powder treated by an optimized ball milling method is sintered through spark plasma coupling high-frequency induction. And the high-entropy metal ceramic material with high bending strength, high hardness and excellent fracture toughness can be obtained at the sintering temperature of 1300 DEG C.

The invention provides a battery pack box body and a battery pack, and relates to the technical field of batteries, the battery pack box body comprises a cross beam assembly, the cross beam assembly comprises a cross beam main body and at least one first supporting beam, a plurality of cavities are formed in the cross beam main body, and inclined ribs are arranged in the cavities close to the bottom of the battery pack box body; one end of the first support beam is welded with the side wall of the cross beam main body deviating from the battery monomer to form a first welding seam and a second welding seam, the first welding seam extends along the second direction and is positioned at the upper part of the first support beam along the third direction, and the second welding seam extends along the third direction and is positioned at two sides of the first support beam along the second direction; the cross beam assembly has the advantages that the cross beam assembly is compact in structure, high in rigidity and relatively light in weight, and the vibration resistance of the cross beam assembly is improved.

The invention relates to the field of civil engineering materials, and discloses a composition for a coating material, the coating material as well as a preparation method and application of the coating material. The composition for the tuff-based inorganic protective coating material comprises a cementing raw material, quartz sand, zinc silicate and an alkaline activator, relative to 100 parts by weight of the cementing raw material, the content of the quartz sand is 100-200 parts by weight, the content of the zinc silicate is 5-10 parts by weight, and the content of the alkaline activator is 40-70 parts by weight; the cementing raw material contains 10 to 50 weight percent of slag, 10 to 50 weight percent of metakaolin and 10 to 50 weight percent of tuff powder. The tuff-based inorganic protective coating material prepared on the basis of the composition has the characteristics of high strength, high cohesiveness and high corrosion resistance.

This invention discloses a high-performance vitrified microsphere composite polystyrene particle insulation board and its preparation method, comprising the following steps: premixing hydrophobic vitrified microspheres and expandable polystyrene particles coated with expanded graphite at a mass ratio of (2.5~4):1 to obtain composite lightweight aggregate. The insulation board prepared by this invention, with a dry density of only 184-193 kg / m³, exhibits a compressive strength as high as 0.275-0.302 MPa, significantly superior to traditional inorganic insulation boards (0.15-0.25 MPa) and organic insulation boards (0.10-0.15 MPa); its thermal conductivity is as low as 0.034-0.041 W / (m·K), and its insulation efficiency is more than 40% higher than that of traditional inorganic materials, while also possessing Class A fire safety performance; furthermore, the process is simple and controllable, with an industrial solid waste utilization rate of up to 70%, demonstrating significant economic benefits and environmental value, and possessing broad prospects for widespread application.

The utility model relates to electric power steel pipe pole technical field discloses a kind of electric power steel pipe pole inner perforation structure, including pipe, the pipe is welded in the pair of perforation of steel pipe pole body, the pipe extends along the axis direction of the pair of perforation;Two ends of the pipe are respectively aligned with the two ends of the steel pipe pole body, and the pipe is used to install hanging line screw.The material of the pipe is high-strength steel, improves the installation strength and stability of hanging line screw, because the pipe extends along the axis direction of the pair of perforation, so that the installation position of hanging line screw is more fixed.Pipe uses high-strength steel material, wall thickness is the wall thickness of steel pipe pole 1 / 2 to 2 / 3, both ensure the strength of structure, and reduce overall weight, improve the use efficiency of material.The chamfer design of pipe two ends reduces stress concentration, improves the fatigue resistance of structure.The reinforcing rib arranged in the pipe increases its bending strength, improves the stability of overall structure.

The application discloses a modified basalt fiber reinforced self-leveling mortar and a preparation method thereof, and relates to the technical field of cement mortar. The modified basalt fiber reinforced self-leveling mortar comprises the following raw materials in parts by weight: 18-22 parts of ordinary Portland cement, 6-10 parts of fast-hardening sulphoaluminate cement, 4-8 parts of gypsum, 35-45 parts of quartz sand, 15-20 parts of calcium carbonate, 0.5-1 part of modified basalt fiber, 2-4 parts of redispersible latex powder, 0.05-0.1 part of cellulose ether, 0.05-0.2 part of defoaming agent, 0.1-0.2 part of retarder and 0.1-0.3 part of water reducing agent. The modified basalt fiber reinforced self-leveling mortar prepared by the application has excellent fluidity, fluidity retention rate, tensile bonding strength, 28d compressive strength, 28d flexural strength and dimensional stability.

The utility model discloses an asymmetric non -middle wall connected arch tunnel support system relates to tunnel support technical field, including connected arch tunnel first -pass hole initial support, connected arch tunnel first -pass hole initial support includes I20a type steel arch frame, inside phi 8 steel bar net, outside phi 8 steel bar net, steel arch frame connecting reinforcing steel bar, big arch foot reinforcing cage, big arch foot steel arch frame triangle bracing structure, big arch foot steel arch frame connecting steel sheet and stiffened steel plate, through the first -pass hole initial support of setting, first -pass hole initial support adopts I20a type steel arch frame, inside phi 8 steel bar net, outside phi 8 steel bar net, steel arch frame connecting reinforcing steel bar, big arch foot reinforcing cage, big arch foot steel arch frame triangle bracing structure, connecting steel plate and stiffened steel plate, form high -strength, high rigid support system, effectively disperses the surrounding rock pressure, reduces local damage, and system anchor rod and radial injection grouting small catheter consolidate surrounding rock through injection grouting, further enhances the stability of surrounding rock.

The utility model discloses a kind of beams of gantry milling, including beam, the beam has hollow cavity, the inner wall of the beam is fixedly connected with multiple annular reinforcing plates at equal intervals, the inner wall of the beam is fixedly connected with multiple reinforcing plates, each the reinforcing plate is fixedly connected with each annular reinforcing plate, the inner wall of the beam is fixedly connected with multiple reinforcing pieces, each the reinforcing piece is fixedly connected with annular reinforcing plate, the bottom of the beam is fixedly connected with two mounting blocks, the bottom of the beam is equipped with two vertical beams, assembly mechanism is equipped between the beam and vertical beam. The utility model is by being provided with equal interval annular reinforcing plate in the beam hollow inner wall, cooperate with the reinforcing plate fixedly connected with it, form support structure, effectively enhance the torsional stiffness and bending strength of beam;Reinforcing piece and annular reinforcing plate fixedly connected that the beam inner wall is provided with, can effectively disperse stress concentration, prolong equipment service life.

The utility model discloses a kind of lightweight high-strength cabinet main body support section bar, belong to cabinet section bar technical field, its technical scheme main point includes crossbeam, column and steel tee, the steel tee is set in the connecting place of crossbeam and column, by the first section bar main plate of crossbeam and column, second section bar main plate adopts W shape outer contour, by bending process forms wave shape cross section, when bearing perpendicular load, W shape structure will force be dispersed to each bending part, reduce single-point stress concentration, steel tee is welded after inserting with crossbeam, column by connecting protrusion, the elastic deformation ability of W shape outer contour and bending part relieves welding thermal stress, improve the fatigue resistance of connecting position, compared with traditional solid rectangular steel pipe, so that the weight of cabinet section bar can be reduced, while the bending strength is greatly improved, meet the urgent needs of industrial electrical integration to cabinet lightweight, improve protection level and multi-cabinet combination and other aspects.

The utility model discloses a seat cask connecting piece and a seat cask, and relates to the technical field of seat cask manufacturing, the seat cask connecting piece comprises a side plate and a connecting structure, the connecting structure comprises a first part and a second part, the first part and the second part form a first included angle, the side plate is located in the first included angle, and the side plate is located in the second included angle. The side plate comprises a flat plate and a reinforcing section, part of the circumferential edge of the flat plate is fixedly connected to the first part and the second part, the edge, not connected with the first part and the second part, of the side plate forms a reinforcing edge, one side of the reinforcing section coincides with the reinforcing edge and is fixedly connected with the reinforcing edge, and the other side of the reinforcing section coincides with the reinforcing edge. An included angle is formed between the reinforcing edge and the flat plate, and one edge, far away from the flat plate, of the reinforcing section is a curled edge. The seat cask connecting piece and the seat cask are higher in strength and higher in safety.

This invention provides a high-parameter SiC / SiC ceramic matrix composite material, relating to the field of aerospace high-temperature structural materials. This high-parameter SiC / SiC ceramic matrix composite material is composed of a SiC fiber preform, an interface phase, and a SiC matrix; the interface phase is a BN layer or a PyC+BN composite gradient layer; the SiC fiber preform adopts a 3D orthogonal braided or needle-punched structure, with a fiber volume fraction of 45%–55%; the SiC matrix is ​​prepared by a CVI+PIP composite process, with a matrix porosity ≤5%. The preparation method includes four main steps: SiC fiber preform preparation, interface phase deposition, SiC matrix densification, and environmental barrier coating. By optimizing the preform braiding structure, interface phase type, and matrix composition, combined with specific preparation processes, the composite material meets the requirements of high mechanical properties, high high-temperature oxidation resistance, high density, and high thermal conductivity. This preparation method, through CVI+PIP composite process optimization, nano-dispersed phase addition, and gradient interface phase design, overcomes existing process bottlenecks and achieves the industrial-scale preparation of high-performance composite materials.

This invention belongs to the field of building materials technology. Specifically, it discloses a glaze for preventing ceramic tile deformation and an anti-deformation ceramic tile, comprising the following raw materials in parts by weight: 15-30 parts spodumene, 15-30 parts calcite, 12-20 parts bauxite, 8-15 parts pyrophyllite, 6-12 parts modified magnesium borate whiskers, 5-9 parts wet-process mica powder, 3-6 parts palygorskite, 1-2.5 parts calcium borate, 1-2 parts tricalcium silicate, and 0.2-0.7 parts ammonium fluoride. The system of this invention uses spodumene, calcite, bauxite, and pyrophyllite as the matrix minerals, effectively lowering the sintering temperature and providing basic strength to the system. At a lower firing temperature, a high degree of sintering of the glaze layer can be ensured, preventing sintering failure of other materials. By adding modified magnesium borate whiskers and wet-process mica powder, the flexural strength is effectively improved.

This invention belongs to the field of engineered wood products manufacturing, specifically a method for preparing low-formaldehyde finger-jointed boards based on bio-based modified adhesives. The method includes preparing an adhesive composed of modified soybean protein, non-formaldehyde crosslinking agents, micro / nano cellulose, nano-silica, and epoxidized vegetable oil elastomers; pre-treating the wood and cutting the finger joints; applying a sealing liquid via atomization for end-face damping treatment; performing quantitative adhesive application and stepped butt joint molding; and employing a multi-stage hot-pressing process involving preheating penetration, high-temperature curing, and cooling and pressure holding. Through the above technical solution, this application can achieve the formation of a dense adhesive film at the finger joint interface, significantly improving bonding strength and stability while reducing formaldehyde release.

The invention provides a fluorescent zirconia composition and a preparation method and application of a fluorescent zirconia porcelain block. The fluorescent zirconium oxide composition is prepared from the following components in percentage by mass: 90 to 95 percent of inorganic powder, 3 to 10 percent of organic matter and 1 to 5 percent of fluorescent component. Wherein the inorganic powder comprises zirconium oxide, hafnium oxide, aluminum oxide, yttrium oxide, titanium oxide and manganese oxide. The organic matter comprises a dispersing agent, an adhesive, a plasticizer and a defoaming agent. The fluorescent component comprises cerium oxide, iron oxide and erbium oxide. Through mutual cooperation of the components, the obtained fluorescent zirconia ceramic block has a fluorescent effect and enhanced toughness at the same time. Moreover, the preparation method disclosed by the invention is simple, convenient to operate and suitable for large-scale industrial production.

The present application belongs to the technical field of preparation of multi-curved surface silicon carbide, and discloses a preparation method of reaction sintering multi-curved surface silicon carbide whole plate, comprising: mixing 100 parts of alpha-SiC powder, 15-20 parts of composite carbon source, 1-2 parts of silicon carbide fiber, 2.3-3.8 parts of dispersing agent, 8-12 parts of water-soluble phenolic resin, 2-4 parts of additive and 42-46 parts of water according to weight parts, pre-dispersing, ball-milling, spray granulating, pressing into multi-curved surface green body; the green body is stacked with graphite support parts and filled with graded silicon particles, and is subjected to step-by-step degreasing and step-by-step reaction sintering under vacuum argon, and then is cooled after temperature control to obtain the product. Through the synergistic effect of formula control of composite carbon source, specific ternary additive and fine sintering process, the technical problem of sintering cracking and cracking of multi-curved surface whole plate is eliminated, and the product density, bending strength and fracture toughness are effectively improved.

The invention discloses anti-cracking and anti-corrosion concrete and a preparation method thereof, and relates to the technical field of concrete preparation, the concrete comprises the following raw materials by weight: 350-400 parts of cement, 80-90 parts of fly ash, 170-190 parts of water, 5-8 parts of a water reducer, 1100-1200 parts of gravel, 700-800 parts of medium sand, 3-5 parts of a modified filler, 8-10 parts of a modified additive, and 3-5 parts of triethylene tetramine. In the raw material mixing process, epoxy groups in the modified additive and epoxy groups on the surface of the modified filler can react with amino groups on triethylene tetramine to form a cross-linked network, and the modified filler contains iron-based layered double hydroxides which can quickly absorb chloride ions, so that the corrosion resistance effect of the concrete is improved, and the service life of the concrete is prolonged. The modified additive forms a polysiloxane network, so that a hydrophobic network is formed in the concrete, and the anti-permeability effect of the concrete is effectively improved.