51results about How to "Good hole making effect" patented technology

The invention provides a preparing method of a nanometer silicon-carbon composite lithium-ion battery negative electrode material. A composite of porous silicon and graphite and a microwave drying method are adopted. The preparing method comprises the following steps of 1, proportionally mixing and ball-milling micrometer silicon, low-melting-point organic matter, carbon sources and a ball milling auxiliary into a ball-milled mixture, and drying the ball-milled mixture for drying pelletizing to obtain a precursor in which micrometer silicon, the low-melting-point organic matter and the carbon sources are evenly distributed; 2, conducting heating treatment on the precursor to make the low-melting-point organic matter molten out to obtain a precursor material in which silicone with a porous structure and the carbon sources are evenly distributed; 3, conducting high temperature sintering on the precursor material under the protection of inert atmosphere to obtain a carbon-covering porous silicon material; 4, proportionally mixing the carbon-covering porous silicon material with a graphite material to obtain the nanometer silicon-carbon composite lithium-ion battery negative electrode material. According to the nanometer silicon-carbon composite lithium-ion battery negative electrode material, the raw materials are rich in sources, low in cost and simple in process, and expansion of a silicon material in the charging and discharging processes is overcome, so that the material has an excellent rate capability and cycle performance.

The invention discloses a preparation method of an alga-based active carbon precursor for a super capacitor. The method mainly comprises the following steps: ultrasound and swelling and other methodsare firstly utilized for carrying out cell wall breaking of alga raw materials, so that alginate in pectin of cell walls and between cells is dissolved; a digestion process is further carried out, under the heating condition with alkali, alginates which are not dissolved in water are converted into water soluble alkali metals and extracted; a cross-linking agent is introduced, and precipitation ofpolymers is formed; washing and filtering steps are carried out, in order to discharge a large amount of inorganic salts, pigments and other impurities which are dissolved in water along with water,and the precursor is obtained. The precursor is carbonized and activated in order to obtain the active carbon material with reasonable pore structure, abundant channels, and massive specific surface area, in order to substantially improve capacity and electrochemical performance of the super capacitor with extremely good industrial application prospects.

The invention provides a preparation method of a porous graphene/carbon nano tube lithium sulfur anode material. The method comprises the steps of introducing silicon dioxide microspheres as a template, mixing with a carbon nano tube dispersion liquid, dropwise adding a sodium ascorbate solution, using hydrofluoric acid for soaking for 5 to 7 days, and obtaining a porous graphene/carbon nano tube;grinding with a sulfur elementary substance, using a hydrothermal reaction kettle for heating for 10 to 15h at 140 to 160 DEG C under the argon protection, and obtaining a sulfur/porous graphene/carbon nano tube. The material prepared by the invention adopts the porous graphite/carbon nano tube composite material as a frame so as to form a three-dimensional conductive network structure, so that sulfur can be stored, and a battery performance is improved.

The invention relates to a fabrication method for a hot pressing diamond bit with added aluminium oxide hollow balls. The method comprises the following processes: allowing the aluminium oxide hollow balls and the diamonds to be subjected to pelletization and film applying; uniformly mixing the film applied aluminium oxide hollow balls, the diamonds and bit matrix powder subjected to ball milling and an adhesive; weighing the mixture and filling into a graphite die according to the required amount of each of drill bits in various specifications; pressing a drill bit steel basal body on the graphite die which is then delivered into an mid-frequency electric furnace and pressing machine all-in-one machine for sintering, wherein the hot pressing pressure is 15-16 MPa, the boiler temperature is 950-960 DEG C, the heat-insulating time is 4-5 min, and the discharging temperature is 815-830 DEG C; and after discharging, slowly cooling to the ambient temperature under the heat-insulating condition, and carrying out demoulding so as to fabricate the drill bit provided by the invention. According to the invention, the diamond volume concentration of the diamonds in a fan-shaped cutting operating block of the drill bit is 11-13 percent, and the volume concentration of the aluminium oxide hollow balls is 12-18 percent. The drill bit is used for drilling objects that are as hard as that of hard and compact rocks; and average drilling effectiveness is improved by 95 percent, and the service life is improved by 80 percent as compared with a general diamond bit.

The invention discloses a large-size diesel oil particulate filter with low pressure drop and a low expansion coefficient and a preparation method thereof. The filter is prepared from the following raw materials: an inorganic component, a graphene precursor, starch, polymer resin and an adhesive, wherein the inorganic component is prepared from the following components by mass: 30 to 50 percent oftalcum, 5 to 30 percent of kaolin, 10 to 25 percent of aluminum oxide, 5 to 30 percent of hydrated alumina and 5 to 25 percent of silicon dioxide; the amounts of the graphene precursor, the starch and the polymer resin respectively account for 2 to 15 percent, 5 to 10 percent and 5 to 15 percent of the mass of the inorganic component; the amount of the adhesive is 2 to 10 percent of the total mass of the inorganic component, the graphene precursor, the starch and the polymer resin. The filter provided by the invention can be used for purifying automobile tail gases, in particular to particulate matters in tail gases of diesel vehicles, so that the problems of high pressure drop and high thermal expansion coefficient in an existing filter are solved; meanwhile, the problem of lower qualification rate in the preparation process of the filter is solved, the production cost is reduced, and the production efficiency is improved.

The invention provides a light heat insulation and hydrophobic glass bead used for construction. The light heat insulation and hydrophobic glass bead comprises, by mass, 60%-80% of clayed perlite production tailings, 5%-25% of expanded perlite micro powder, 0.5%-2.0% of fluorite powder, 0.5%-5.0% of pure alkali, 0.3%-1% of green silicon carbide dust collection powder, 0.5%-1% of quicklime powder and 8%-12% of water glass. The invention further provides a preparation method of the light heat insulation and hydrophobic glass bead used for construction, and the light heat insulation and hydrophobic glass bead used for construction has the beneficial effects of being small in volume density, good in heat insulation performance and low in water absorption rate and is wide in application prospect.

The invention discloses a transparent freshness-preserving film capable of prolonging the freshness-preserving time of fruits and vegetables and a preparation process of the transparent freshness-preserving film. The transparent freshness-preserving film is characterized by being prepared from, by weight, 1000-1200 parts of polyethylene, 100-120 parts of kaolin, 4-30 parts of sodium alginate, 16-150 parts of chitosan, 300-600 parts of dioctyl phthalate, 2-8 parts of ultraviolet light absorbent, 20-50 parts of polysulfonyldiphenylene phenyl phosphonate, 2-30 parts of antibacterial agents, 100-200 parts of beeswax and 10-30 parts of silicon dioxide, wherein the dioctyl phthalate serves as plasticizer. The transparent freshness-preserving film and the preparation method thereof have the advantages that the technology is good in holemaking effect, simple in process and low in product cost. By adding an appropriate number of inorganic particles, the film weight is increased, the transparency of the film is improved, meanwhile, the strength and softness of the film are further improved, the film can have a better freshness-preserving effect, the selling cycle is prolonged, the loss and consumption are lowered, and thereby the operation cost of a supermarket is lowered.

The invention relates to alginate-based porous carbon as well as a preparation method and application thereof. The preparation method comprises the following specific steps: putting alginate or a calcium-modified alginate precursor into a tubular furnace, introducing protective gas into the tubular furnace, heating to carry out carbonization; washing and drying the carbonization product, impregnating the carbonization product in a chemical activator solution; after impregnation, heating the carbonization product to activate the carbonization product in a protective atmosphere, and after activation, washing to obtain the alginate-based porous carbon. The obtained porous carbon is uniform and consistent in morphology, rich in pores, large in specific surface area and reasonable in micro-pore, mesopore and macro-pore distribution. A super capacitor electrode prepared by the porous carbon is excellent in performance and good in cycling stability.

The invention provides a process method for producing high-quality organic system supercapacitor active carbon. The process method comprises: 1) washing a coconut shell carbonization material 3 times,drying to obtain a drying material, crushing the drying material to achieve a particle size of 50-80 [mu]m, adding the crushed material to a metal oxide suspension, stirring for 20 min in a high-pressure stirring kettle to obtain a mixture, placing the mixture in an activation furnace introduced with an inert gas, pre-activating, heating at a heating rate of 10-15 DEG C/min to an activation temperature of 600 DEG C, and maintaining for 50 min to obtain a pre-activated material; 2) heating the pre-activated material to a temperature of 850-950 DEG C, introducing a mixed gas of water vapor andoxygen, and carrying out an activation reaction for 120 min to obtain an activated material; and 3) reducing the temperature of the activation furnace to 600-800 DEG C, introducing carbon dioxide gas,carrying out a reaction, naturally cooling to a room temperature under an inert atmosphere, soaking in an acid solution, washing with pure water to achieve a neutral state, and drying to obtain the supercapacitor active carbon. According to the present invention, the prepared active carbon has characteristics of high specific surface area, reasonable pore size distribution and the like.

The invention provides a preparation method of a carbon material for a supercapacitor, the carbon material and application of the carbon material, and the preparation method of the carbon material forthe supercapacitor comprises the following steps: step 102, pretreating a certain amount of raw coal and gasified slag enriched carbon, then performing uniform mixing with a certain amount of co-activator, and carrying out high-temperature activation treatment; and step 104, mixing the first product obtained after high-temperature activation treatment with a certain amount of an acid-alcohol mixed solution, performing heating and stirring, and carrying out suction filtration, washing and drying after the reaction is finished for later use. According to the preparation method, the raw materials are cheap and easy to obtain, the process is simple and controllable, the operation conditions are mild, industrial production can be achieved, and the carbon material prepared through the preparation method has the characteristics of being high in specific surface area, high in specific capacitance, small in internal resistance and the like.

The invention relates to the technical field of exhaust pollutant post-treatment of gasoline vehicles, and particularly relates to a method for preparing a low-pressure drop and low-expansion coefficient cordierite gasoline vehicle exhaust particle catcher by using fumed silica. The method comprises the following steps: (1) mixing inorganic raw materials by a dry method, and adding a binder; (2) kneading; (3) practicing; (4) extruding, microwaving and drying; (5) cutting and sintering; (6) punching holes, blocking the holes and then putting the holes into a kiln for back burning. The fumed silica material is adopted as the raw material catcher, the pore-forming effect is remarkable, and the micro-pore connectivity is good, so that the pressure drop and the thermal expansion coefficient ofthe catcher can be reduced; meanwhile, the fumed silica can replace common silica, thereby not only achieving the function of serving as an inorganic component, but also achieving the pore-forming effect and reducing the adding amount of the organic pore-forming agent; the use of the fumed silica not only can meet the use requirements, but also reduces the production cost and improves the production efficiency.

The invention discloses a transparent preservative film for preserving agricultural product with micropores and preparation technology thereof. The preservative film is characterized by comprising: by weight, 1000-1200 parts of polyethylene, 100-120 parts of calcium carbonate, 3-30 parts of sodium alginate, 15-150 parts of chitosan, 300-600 parts of dicapryl phthalate, 2-8 parts of ultraviolet ray absorber, 20-50 parts of polysulfonyldiphenylene phenyl phosphonate, 1.5-30 parts of antibacterial agent, and 200-300 parts of beeswax, wherein dicapryl phthalate is a plasticizer. The preparation technology has good effect on making holes, and has simple process and low product cost. The film weight is increased by adding moderate inorganic particles, and the transparency of the film is increased, further the intensity and softness of the film are increased, which makes the preservative film has good preservation effect. So that the sale period is prolonged, the spoilage is reduced, and the operating cost of supermarket is reduced.

The invention relates to a preparation method of a defective nanofiber carbon carrier coupled iron monatomic catalyst, and belongs to the field of new energy nanomaterials and the technical field of catalysis. The invention aims to solve the problem of low CO2RR reaction activity caused by low specific surface area of the existing catalyst. According to the main scheme, a one-dimensional nanofiber material is prepared from a Fe-doped metal organic framework, polyacrylonitrile and N, N-dimethylformamide through an electrostatic spinning reaction, then Fe single atoms are prepared through high-temperature heat treatment under the protective atmosphere and are loaded on a nitrogen-doped carbon carrier, then under the assistance of diaminonitrile, unstable pyridine nitrogen and pyrrole nitrogen in a carbon skeleton are removed through secondary heat treatment at the temperature of 1,100 DEG C, the carbon-carrier-loaded Fe monatomic catalyst with the intrinsic defects is obtained, and the prepared carbon-carrier-loaded Fe monatomic nanofiber material with the intrinsic defects has high catalytic activity and stability and can be applied to an electrode material for electrocatalytic CO2 reduction reaction.

The invention provides preparation methods of a polycrystalline silicon wafer texturing liquid and a black silicon material and application of the polycrystalline silicon wafer texturing liquid and the black silicon material in accelerating LeTID recovery of a PERC battery. The polycrystalline silicon wafer texturing liquid is prepared from HF (Hydrogen Fluoride), Mn(NO3)2, poly(N-vinylacetamide)and water. By adopting the polycrystalline silicon wafer texturing liquid, a damaged layer does not need to be removed before texturing, a polycrystalline silicon wafer can be directly immersed into the polycrystalline silicon wafer texturing liquid for etching, rapid texturing is realized in a relatively mild environment, the etched polycrystalline silicon wafer can be used for preparing a solarcell after being cleaned for removal of impurities, the use is convenient, and the texturing time is short. The invention also provides a preparation method and application of the black silicon material. The black silicon material has the characteristic of accelerating LeTID recovery when being used for a polycrystalline silicon PERC battery processing technology, can improve the power generationefficiency of the battery, and is beneficial to the popularization and application of the polycrystalline silicon PERC battery.

The invention discloses a honeycomb ceramic carrier for a diesel engine soot particle purifying DPF (diesel particulate filter). The honeycomb ceramic carrier comprises a main body material, a splicing material and a hole sealing material. A preparation method of the honeycomb ceramic carrier comprises the following steps: preparing main body mud; carrying out extrusion molding on the main body mud, drying the extruded and molded mud, cutting the dried mud to form square blocks, and sintering the square blocks by a vacuum induction furnace to form a honeycomb monomer; carrying out height cutting processing on the honeycomb ceramic monomer, bonding the cut honeycomb ceramic monomer by splicing mud to form a spliced honeycomb ceramic body, carrying out microwave drying until the splicing mudis completely dried, carrying out outer circle processing, covering the sidewall of the spliced honeycomb ceramic body with the splicing mud to form an outer skin layer, and carrying out microwave drying until the outer skin layer is completely dried; and carrying out crossing interval hole sealing on the end surface of the obtained honeycomb ceramic with the hole sealing mud, carrying out microwave drying, and baking the dried honeycomb ceramic at 600 DEG C to obtain the honeycomb ceramic carrier for the diesel engine soot particle purifying DPF. The honeycomb ceramic carrier for the dieselengine soot particle purifying DPF has the advantages of high porosity, large specific surface area, high refractory temperature and high mechanical strength.

The invention discloses an electrolysis column, electrolysis impurity removal device and impurity removal method for nickel plating liquid electrolysis impurity removal. The electrolysis column comprises a shell, a cathode and an anode. The cathode and the anode are arranged in the shell. The cathode comprises a base material. The base material is plastic of a porous mesh-shaped structure. The surface of the plastic is coated with an electric conduction adhesive layer. The surface of the electric conduction adhesive layer is electroplated with a metal layer. The electrolysis impurity removal device comprises a water pump, an electric controller, an electrolytic bath and a purification tank. The electrolysis column is detachably connected in the electrolytic bath. The input end of the waterpump communicates with an electroplating tank. The output end of the water pump communicates with a water inlet of the electrolysis column. The cathode and the anode of the electrolysis column are both electrically connected with the electric controller. The device further comprises the purification tank. The electrolytic bath is provided with an overflow opening communicating with the purification tank. The purification tank is provided with a water outlet. The water outlet communicates with the electroplating tank. The impurity removal method includes the step of electrolysis impurity removal and the step of impurity recycling and has the characteristics of being simple, feasible and good in impurity removal effect.

The invention relates to a preparation method of a hydrophobic porous carbon material, which belongs to the field of carbon materials, and is characterized by comprising the following steps: pre-emulsifying raw materials organic silicon, styrene, acrylate, an emulsifier and deionized water, dropwisely adding potassium peroxodisulfate to perform emulsion polymerization to obtain styrene-acrylic latex SSAL, and blending the SSAL with an oxalic acid solution to obtain a resin matrix PSO; and carbonizing PSO at high temperature to obtain a hydrophobic porous carbon material. According to the method, oxalic acid is used as an activating agent, and a specific adding step is matched, so that the pore-forming effect is guaranteed, and meanwhile, energy waste and waste liquid generation are avoided.