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2086results about How to "Promote infiltration" patented technology

Preparation method of continuous oxide fiber reinforced oxide ceramic based composite

ActiveCN105254320AAvoid Density GradientsAvoid fiber strength loss or pulverizationSolventOxide ceramic
The invention belongs to the preparation technology of a continuous fiber reinforced ceramic based composite, and relates to a preparation method of a continuous oxide fiber reinforced oxide ceramic based composite. The technology comprises the steps that an organic ceramic precursor solution is utilized to serve as solvent to prepare slurry with ceramic powder, the slurry is smeared on the surface of oxide fiber fabric to prepare oxide fiber prepreg, the technological processes of laminating, mold pressing and sintering are conducted on the prepreg, a low-porosity ceramic based composite preform is obtained, the repeated processes of soaking and splitting are conducted by adopting an organic ceramic precursor, and the continuous fiber reinforced ceramic based composite with the ideal density is obtained. According to the preparation method of the continuous oxide fiber reinforced oxide ceramic based composite, the organic ceramic precursor is adopted to serve as the solvent to prepare the ceramic slurry, the organic ceramic precursor can play a role of bonder for bonding the ceramic powder, low-temperature inorganic characteristics of the organic ceramic precursor can be utilized, fiber is protected against thermal damage caused by high temperature in the composite preparation process, and the composite strength is improved.
Owner:AVIC BEIJING AERONAUTICAL MFG TECH RES INST +1

Absorptive core, absorptive core molding equipment and absorptive core manufacture method

The invention relates to the manufacture field of absorptive sanitary articles and automatic production equipment and discloses an absorptive core. The absorptive core comprises an absorptive core surface layer, an absorptive core middle layer and an absorptive core bottom layer, wherein the tightness degrees of the absorptive core middle layer and the absorptive core bottom layer are larger than the tightness degree of the absorptive core surface layer. The invention further discloses absorptive core molding equipment and an absorptive core manufacture method. The gathering degrees of fluff pulp fibers in the surface layer, the middle layer and the bottom layer of the absorptive core are from relative looseness to compactness, and the gradient density design can rapidly absorb body fluid, is favorable to fluid permeation and effectively reduces the possibility that the body fluid leaks from the absorptive sanitary articles. When the absorptive core of the structure is manufactured, a molding screen is effectively prevented from being blocked by high molecular absorption resin granules, time and cost which are spent on cleaning and maintaining the molding screen are saved, and the production efficiency of the absorptive core molding device is further improved.
Owner:ZUIKO (SHANGHAI) CORP

Super-capacitor electrode based on vertical oriented graphene and manufacturing method thereof

The invention discloses a super-capacitor electrode based on vertical oriented graphene and a manufacturing method thereof. The electrode comprises a current collector and a graphene nanosheet, wherein the graphene nanosheet is vertical to the surface of the current collector; each graphene nanosheet comprises 1-10 layers of graphene. In the manufacturing process, the current collector is heated to 600-1000 DEG C; a carbon element contained gas is adopted as a precursor gas to generate a plasma; the current collector is placed in the plasma; a vertical oriented graphene nanosheet directly grows on the surface of the current collector by using a plasma reinforced chemical vapor deposition method, and after the vertical oriented graphene nanosheet grows for 5 minutes to 8 hours, the obtained current collector with the vertical oriented graphene nanosheet grown on the surface is the super-capacitor electrode. The super-capacitor electrode with the vertical oriented graphene as active material can be made in one step so that the use of adhesives and agglomeration of graphene are avoided, the benefit of material infiltration and ionic diffusion is achieved and the potential in effective energy storage area of the graphene and the property of the super-capacitor is improved.
Owner:ZHEJIANG UNIV

Lead-free glass powder, preparation method thereof, silver paste containing glass powder and crystal silicon solar cell manufactured by using silver paste

The invention discloses lead-free glass powder, a preparation method thereof, silver paste containing the glass powder and a crystal silicon solar cell manufactured by using the silver paste. The lead-free glass powder comprises the following components in percentage by weight: 20-30 percent of SiO2, 2-15 percent of B2O3, 40-70 percent of Bi2O3, 1-10 percent of ZnO, 1-10 percent of Al2O3 and 1-5 percent of BaO. The preparation method comprises the following steps of: (1) weighing the components for preparing a mixture; (2) putting the mixture into a crucible for melting; (3) performing water quenching on molten glass; (4) drying; (5) smashing the mixture into powder by planetary ball milling; and (6) screening. The needed silver paste is prepared from the lead-free glass powder, silver powder, an additive and an organic carrier. A solar panel front face electrode and a grid line are manufactured by performing screen printing and sintering on conductive silver paste on a cell substrate, so that the needed solar cell is obtained. The lead-free glass powder has low melting temperature, low softening temperature and low linear expansion factor.
Owner:湖南威能新材料科技有限公司

Multifunctional system for rainwater infiltration, collection and storage and purification of sponge city

The invention discloses a multifunctional system for rainwater infiltration, collection and storage and purification of a sponge city.The system comprises a bioretention pond and water storage wells.Firstly, appropriate positions are selected for digging of a foundation pit of the bioretention pond and the water storage wells, and the portions, 5-10 cm away from the two sides of the bioretention pond, of the road surface are paved with opened vertical curb belts.The bioretention pond sequentially comprises a gravel covering layer, a vegetation planting soil layer, a biochar packing layer and a gravel drainage layer from top to bottom, and the periphery and bottom of the bioretention pond are both paved with anti-seepage thin film.An overflow pipe is laid on the gravel drainage layer, an upper end overflow opening is 5-10 cm higher than the gravel covering layer, and the lower end of the overflow pipe is connected with a municipal drainage pipe network.The system can be used at the places such as residential areas, schools, parking lots, parks and roads, not only can rainwater be stored, but also the content of pollutants such as nitrogen, phosphorus and heavy metal can be reduced, the purpose of recycling is achieved, city water logging is effectively relieved, and the rainwater use efficiency is improved.
Owner:中壤建设股份有限公司

Preparation method of carbon-coated sodium-micron-scale lithium titanate composite anode material

The invention relates to a preparation method of a carbon-coated sodium-micron-scale lithium titanate composite anode material. The method comprises steps as follows: lithium salt is dissolved in an aqueous solution of absolute ethyl alcohol, and the solution is marked a solution a; an organic titanium compound and a carbon source are dissolved in absolute ethyl alcohol, and the solution is marked a solution b; a chelating agent M is dissolved in absolute ethyl alcohol, ultrasonic dispersion is performed, and the solution is marked a solution c; the solution c is slowly dropwise added to the solution b while stirring, and white sol is obtained; then the solution a is slowly dropwise added to the white sol; after the sol is aged, heating, stirring, drying, grinding, sieving and calcination are performed, and the carbon-coated lithium titanate composite anode material is obtained. Lithium titanate has narrower particle size distribution and more uniform particle distribution, and sodium-micron-scale particles are uniformly inlaid to form particles with high tap density; the particle structure is loose and porous, the specific surface area of a formed electrode is larger, getting off of lithium ions in the lithium titanate material is facilitated, and the stability of the crystal structure of the lithium ions in the charge and discharge process is guaranteed.
Owner:SHANDONG YUHUANG NEW ENERGY TECH

Filament low-melting-point polyester fiber and preparation method thereof

The invention relates to a filament low-melting-point polyester fiber and a preparation method thereof. The filament low-melting-point polyester fiber is in a skin-core structure, a skin layer is made of low-melting-point polyester; a core layer is made of PET (polyethylene terephthalate); the low-melting-point polyester consists of a terephthalic acid chain segment, an isophthalic acid chain segment, an ethylene glycol chain segment, a diethylene glycol chain segment, a molecular weight modifier chain segment and a 1, 12-Dodecanediol chain segment containing branched chains; a molecular weight modifier corresponding to the molecular weight modifier chain segment is specifically a monoacid series or a diacid series; the preparation method of the filament low-melting-point polyester fiber comprises the following steps: polymerization of the low-melting-point polyester and skin-core composite spinning, so as to obtain the filament low-melting-point polyester fiber. The prepared filament low-melting-point polyester fiber has the advantages that the initial melting point is reduced, the melting speed is increased, the polyester fiber is immediately melted at the corresponding temperature, and the melting effect is good.
Owner:扬州富威尔复合材料有限公司

Electrode pole plate of lithium ion battery, pole plate rolling device and lithium ion battery

The invention discloses an electrode pole plate of a lithium ion battery. The electrode pole plate comprises a current collector and active substance coating layers, wherein the active substance coating layers are uniformly coated at two sides of the current collector, and grooves are symmetrically and uniformly formed in surfaces of the active substance coating layers at two sides. A thick pole plate with specially-shaped grooves in a surface are prepared, the electrolyte retention quantity in the battery can be remarkably increased, and long-term recycle of the battery is promoted; moreover, the specially-shaped grooves are uniformly formed in the surface of the thick pole plate, electrolyte penetration and diffusion are facilitated, and the rate charge-discharge electrochemical performance of the battery is improved; and meanwhile, the specially-shaped grooves are uniformly formed in the surface of the thick pole plate, thus, the specific area of the pole plate is expanded, the polarization current density of the battery during the charge-discharge process is reduced, a lithium precipitation risk of a large-current charging positive electrode separator is improved, and the application safety of the battery is improved.
Owner:欣旺达惠州动力新能源有限公司

Lithium ion battery positive electrode slurry, preparation method thereof and lithium ion battery

The invention relates to lithium ion battery positive electrode slurry, a preparation method thereof and a lithium ion battery. The positive electrode slurry comprises a positive electrode active substance, a solvent, a composite binder, a composite conductive agent and a dispersing agent, wherein the composite conductive agent is a mixture composed of a conductive agent A and a conductive agent B; the conductive agent A is a conductive agent capable of forming a point-to-point conductive network; the conductive agent B is a conductive agent capable of forming a point-to-line or surface-contact conductive network; and the conductive agent A and the conductive agent B respectively account for 80-90% and 10-20% of the total weight of the conductive agent. According to the method disclosed bythe invention, the positive electrode slurry is processed and modified by changing the adding sequence of different substances in the positive electrode slurry, adjusting the stirring time, the stirring speed and the proportioning ratio and using the dispersing agent, the positive electrode slurry which enables all the components to be uniformly mixed and is relatively good in dispersion, moderate in viscosity and relatively small in fineness can be prepared, and the positive electrode slurry can improve the processing performance of the lithium battery and also can keep the battery to have excellent electrochemical performance.
Owner:桑顿新能源科技(长沙)有限公司

Reaction device for simulating migration and transformation of soil organic pollutant

The invention discloses a reaction device for simulating migration and transformation of a soil organic pollutant, relates to a reaction device, and solves the problem that existing leaching experiment equipment for simulating the migration and transformation of the soil organic pollutant is large in experimental error, low in equipment use ratio and poor in adaptability The reaction device comprises a first water box, a second water box, a water pump, a water inlet pipe, a steady flow pipe, a support, a supporting frame, a base, a fixed plate, a first regulating valve, a second regulating valve, multiple flowmeters, multiple sieve hole plates, multiple earth pillars and multiple fifth regulating valves, wherein the first water box, the support and the supporting frame are all arranged on the base; the fixed plate is connected with the supporting frame, and the second water box is supported through the supporting frame; the supporting frame is provided with the multiple earth pillars which are vertically arranged, each flowmeter is arranged right above each earth pillar, the multiple flowmeters are fixedly arranged on the fixed plate, and the sieve hole plates are fixedly arranged on the support. The reaction device disclosed by the invention is used for simulating the migration and transformation of the soil organic pollutant.
Owner:NORTHEAST AGRICULTURAL UNIVERSITY

Method for governing red soil strongly-eroded slope

The invention relates to a method for governing a red soil strongly-eroded slope. The method comprises the following steps that (1) horizontal furrow groups are dug in a red soil strongly-eroded slope surface along all contour lines, each horizontal furrow group comprises multiple horizontal furrows, and the cross section of each horizontal furrow is trapezoid; (2) planting holes are dug between two adjacent horizontal furrows in the same horizontal furrow group, and the cross section of each planting hole is trapezoid; (3) shrubs and grass are planted in the horizontal furrows, and grass is planted in the planting holes; (4) shallow furrows are dug in the same horizontal furrow group, and water and soil conservation grass seeds are evenly sowed in the shallow furrows to form horizontal grass band chains; (5) after the environment of the strongly-eroded slope is improved one year later, trees are then planted in the horizontal furrows and the planting holes. The method is applied to water and soil loss governance and governance of ecological environment of vegetation recovery of the red soil strongly-eroded slope, water storage and soil protection performance of the slope is increased, the ecological environment good for the vegetation recovery is created, and the governance effect of a red soil strongly-eroded area is improved.
Owner:FUJIAN AGRI & FORESTRY UNIV

Rear-earth surface-modified hollow glass microsphere and preparation method thereof

The invention provides a rear-earth surface-modified hollow glass microsphere and a preparation method thereof. The rear-earth surface-modified hollow glass microsphere is prepared from the following raw materials: hollow glass microsphere, sodium hydroxide and rare earth compound in parts by mass: 100 parts of hollow glass microsphere, 300 parts of sodium hydroxide solution and 300 parts of rare-earth aqueous solution, wherein the hollow glass microsphere has the compression strength larger than 40MPa and the average grain size of 5-80 microns, the sodium hydroxide solution has the mol concentration of 0.1-0.5 mol/l, and the rear earth is one of cerous nitrate, cerium chloride, lanthanum nitrate, lanthanum chloride, yttrium nitrate or yttrium chloride and is 0.3-2.0 percent by mass of the rare-earth aqueous solution. The preparation method comprises the following steps of: firstly, arranging the hollow glass microsphere in the low-concentration sodium hydroxide solution to increase the hydroxyl radical number and the roughness on the surface of the hollow glass microsphere; and then, adding to a rare-earth metal salt solution to modify, wash and dry. The invention has simple process, high efficiency and low cost, and the treated hollow glass microsphere is added to a polymer to remarkably improve the interfacial compatibility between a filler and a substrate, and the hollow glass microsphere modified by the method can be widely applied to the special composite material fields, such as aerospace, wind power generation, vehicles, buildings, heat insulation, sound insulation, and the like.
Owner:HEBEI BEISU PIPE IND
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