41results about How to "Well distributed holes" patented technology

The invention relates to a method for preparing flake porous ZnO nano powder, which comprises the following steps: adding ammonia into solution of zinc nitrate dropwise, and adjusting the pH of the solution to between 6 and 8; under the condition of stirring by magnetic force at the rotating speed of 0 to 180r/m, performing reaction at the temperature of between 0 and 80DEG C for 0.5 to 3 hours; separating, washing and drying the obtained cloudy solution to obtain a crosslinked flake and dispersed flake basic zinc nitrate precursor; and calcinating the basic zinc nitrate precursor with the two appearances at the temperature of between 220 and 500DEG C for 0.5 and 3 hours to obtain the flake porous ZnO nano powder. The nano ZnO product prepared by the method is white powder, belongs to a hexagonal system, has large specific surface area, high purity and good product quality, and responds to gas such as ethanol and acetone sensitively.

The invention relates to carbon paste of electrodes for a dye-sensitized solar cell and a preparation method. The carbon paste comprises liquid mixture and solid carbon powder, wherein, the liquid mixture is 15-95wt percent and the solid carbon powder is 5-85wt percent, wherein, the liquid mixture is mixed by 0.5percent-40wtpercent of viscosity modifier and 20-99.5wtpercent of solvent. Owing to the addition of the viscosity modifier and the solid powder with particle size less than 1mm and 10-2000m<2>/g of specific surface area in the carbon paste, the viscosity of the paste can be controlled, the carbon paste disperses uniformly, and the paste can keep long-term stabilization. Pore inducing materials can be added in the carbon paste, porous solid thin films for batteries can be conveniently prepared by the carbon paste. The thin film is a solid carbon thin film with smooth surface, large surface area, uniform distribution of pores and firm combination with substrates.

The invention discloses a low porosity closed cell foam aluminum alloy preparation method comprising the steps of, (1) heating aluminium alloy to melting, (2) charging 0.5-5% thickener, stirring the aluminium alloy to increase thickness, (3) charging foaming agent 0.2-5.0 wt% of aluminium alloy, stirring homogeneously, (4) stirring 10s-180s again, (5) extracting the stirring paddle, (6) subjecting the thermal insulated foam aluminium alloy flux to simultaneous cooling. The invention also discloses a closed cell foam aluminium alloy with low factor of porosity.

The invention discloses a micro-nano processing method for an aluminum/aluminum alloy surface. The method comprises the following steps of: placing the aluminum/aluminum alloy into electrolyte containing hydrochloric acid, sulfuric acid, phosphoric acid and a corrosion inhibitor to carry out direct current electrochemical corrosion, wherein the aluminum/aluminum alloy is used as an anode, the concentration of the hydrochloric acid is 1.5-3mol/L, the concentration of the sulfuric acid is 0.9-1.2mol/L, and the concentration of the phosphoric acid is 0.6-1mol/L. A method for integrating the aluminum/aluminum alloy and plastic comprises the following steps of processing a micro-nano porous structure on the aluminum/aluminum alloy surface by using the micro-nano processing method and tightly integrating the plastic and the aluminum/aluminum alloy surface by using the micro-nano porous structure. The micro-nano porous structure, which is formed by using the micro-nano processing method, is formed on the surface of an aluminum/aluminum alloy structure. The micro-nano processing method is high in micro-nanometer pore processing efficiency and good in micro-nanometer pore quality, and is very environment-friendly.

The invention discloses a preparation method and device for a bottom blowing type photocatalytic porous permeable brick. The preparation device for the bottom blowing type photocatalytic porous permeable brick is characterized by comprising a forming die, a breathable end cover, a porous lining board, a draw bar, a nylon mesh, an air inlet pipe and a water draining pipe. The preparation method for the bottom blowing type photocatalytic porous permeable brick comprises the following steps: (1) smashing straw into particles with the length of 1-2cm; (2) putting the straw particles into a water glass solution to be soaked for 30 minutes, then taking out, and drying; (3) soaking in tung oil for 5 minutes, and then drying; (4) uniformly mixing the straw particles, cement, river sand, water glass, chopped fiber glass filaments, a cement foaming agent and water; (5) pouring mixed slurry into the forming die, and introducing CO2 gas at the temperature of 80 DEG C for curing; (6) drying for 5-7 days; (7) carrying out heat preservation on a porous brick for 1 hour at the temperature of 150 DEG C, slowly heating to 400 DEG C, carrying out heat preservation for 5 hours, and carrying out furnace cooling; and (8) impregnating and drawing a porous permeable brick in a photocatalytic plating solution for 5 minutes and then drying, and repeating for 3-4 times, so that the photocatalytic porous permeable brick is obtained.

The invention discloses a method for preparing an aluminum oxide template by step decompression reaming. The method comprises the steps as follows: 1) taking a polished aluminum foil as an anode and a platinum electrode as a cathode, placing the anode and the cathode into an acidic electrolytic solution, connecting a power supply, and carrying out anodic oxidation for 1-5 h for the first time; 2) after the anodic oxidation for the first time, removing an aluminum oxide film on the surface of the anode, and carrying out anodic oxidation for 1-5 h for the second time; 3) after the anodic oxidation for the second time, carrying out step decompression treatment by reducing the voltage between the anode and the cathode at a speed of 0.5-3 V/min and disconnecting the power supply until the voltage is reduced to be less than 16 V; and 4) after the step decompression treatment, cleaning the aluminum foil, placing into a reaming solution, and reaming for 10-60 min. According to the method, the baffle layer thickness of the aluminum oxide template and the length and diameter of template holes can be accurately controlled; and the needed equipment is simple, the operation process is convenient, and the parameters are easy to control.

The invention belongs to the technical field of tantalum sheet preparation and discloses a preparation process of a porous tantalum sheet. An electrolytic corrosion mode is adopted for preparation. The preparation process comprises the steps of preparing a tantalum sheet as an anode electrode and platinum as a cathode electrode, and putting the anode electrode and the cathode electrode into an electrolytic cell; preparing an electrolyte solution with ethyl alcohol and a conductive agent, and putting the prepared electrolyte solution into the electrolytic cell, wherein the conductive agent is chloride which can be dissolved into the ethyl alcohol; after the distance between the anode electrode and the cathode electrode, fixing the anode electrode and the cathode electrode to the electrolytic cell; and connecting the anode electrode and the cathode electrode to a positive pole and a negative pole of a direct-current power source correspondingly, and starting electrolytic corrosion to prepare the porous tantalum sheet. The obtained porous tantalum sheet is large in number of holes; the holes are distributed relatively uniformly; the diameters of the holes are each at the micron level;and the tantalum sheet can be used as an excellent raw material in all relevant fields.

The invention discloses a corrosion method for an ultra-high-voltage and high-specific-capacity positive electrode corrosion foil. The ultra-high-voltage positive electrode corrosion foil is a positive electrode foil used for an aluminium electrolytic capacitor, wherein Vt of the positive electrode foil is greater than or equal to 1,050V; and the corrosion method comprises the following steps of pre-treatment, first-stage corrosion, second-stage corrosion, third-stage corrosion and post-treatment. Through improvement of a corrosion process, corrosion mixed solution prescription and the like, the produced aluminum foil can satisfy the ultra-high-voltage formation requirement with Vt which is greater than or equal to 1,050V; in addition, the shortcoming of low specific capacity caused by high probability of blocking after formation due to small corrosion foil hole in the prior art is also overcome; higher mechanical strength and longer service life are achieved under the premise of obtaining higher pore diameter and static specific capacity; and meanwhile, the produced formation foil is high in stability, low in electric leakage, quick in voltage boosting time, and capable of filling up the blank in the field of the ultra-high-voltage corrosion foil in the prior art.

The invention discloses a preparation method and products of a novel macroporous carbon material. According to the preparation method comprises the following steps of carbonizing and heating macroporous phenolic resin serving as a carbon source and FeCl3 serving as a catalyst to obtain the novel macroporous carbon material. By adopting the macroporous phenolic resin serving as the carbon source and FeCl3 serving as the catalyst, slow oxidation, catalysis and carbonization are simultaneously performed; by the structure-directing effect of the macroporous phenolic resin and the kirkendall diffusion effect of Fe element in FeCl3, the Fe element enters the phenolic resin plate to modify carbon pores, and the regular and hard macroporous carbon material having more smooth pore walls is finally prepared; and meanwhile, the distribution of pores in the prepared macroporous carbon material is more uniform.

The invention discloses a reinforcing construction method for a trough plate platform of an operation subway station and belongs to the technical field of reinforcing construction of operation subwaystation structures. The reinforcing construction method comprises the following steps of S1, construction applying and blockage of a track line, S2, construction preparation, S3, hole forming, S4, mounting of steel bars, S5, mounting of steel formworks, S6, stirring of cement foundation grouting materials, S7, pouring of the cement foundation grouting materials and pressurizing of a high funnel, S8, platform surface recovering and S9, applying of construction completion and removing of line blockage. According to the reinforcing construction method for the trough plate platform of the operation subway station, the two holes with the diameter being 90 mm are formed in a trough plate and serve as the pouring hole and the pressurizing hole correspondingly, and not only can the integrity of the overall structure of the trough plate platform and the safety of the operation station be guaranteed, but also the reinforcing construction requirements can be met; the assembled steel formworks areutilized as a part of the reinforcing structure, and convenience and rapidness are achieved; and the reinforcing construction method has the advantages that safety is high, operation is convenient, applicability is high, and manual operation strength is reduced.

The invention provides a method for continuously extracting a beta-methylnaphthalene crude product from a methylnaphthalene enrichment liquor. The method comprises steps as follows: methylnaphthalenefractions are treated with an ammonium bisulfate water liquor and a heptane and ethanol amine mixed liquor sequentially, separation is performed, an upper-layer oil phase is taken, and alkyl methylnaphthalene subjected to secondary purification is obtained; an entrainer is added to alkyl methylnaphthalene subjected to secondary purification, indirect reduced pressure distillation operation is performed, the reduced pressure distillation is performed under the vacuum degree of minus 0.09 MPa and at the tower top temperature of 80 DEG C and the tower bottom temperature of 150 DEG C, a gas phasepasses through a porous alumina membrane/carbon fiber filler cold trap at the tower top, and the beta-methylnaphthalene crude product is obtained; the beta-methylnaphthalene crude product is put in afreezing microtome and frozen and crystalized at the temperature of subzero 25 DEG C to subzero 15 DEG C, separation is performed, then, redisliquor is performed at the temperature of 36-40 DEG C, andbeta-methylnaphthalene is obtained, wherein the porous alumina membrane/carbon fiber filler cold trap comprises alternate porous alumina layers and carbon fiber layers.

The invention discloses a foam-like magnetic chitosan adsorbent and a preparation method thereof. The foam adsorbent is foamed by carbon dioxide produced by the reaction of sodium bicarbonate and acetic acid, and is prepared under the aid and protection of glycerol, the size and distribution of pores in the foam adsorbent are uniform, and more active groups are retained on chitosan. Consequently,the foam-like magnetic chitosan adsorbent has the advantages of having adsorbability to metal ions, and being conducive to large-scale application of the foamed chitosan-based adsorbent in water treatment.

The invention provides a manufacturing method of porous tasty bean curd based on microwave pretreatment, comprising the following steps: (1) washing fresh soybeans and draining, adding distilled waterwhich is 6 times the weight of the soybeans, carrying out microwave treatment at the power of 200 W in a microwave oven for 3 min, taking the materials out of the microwave oven and cooling to room temperature to obtain pretreated soybeans; (2) immersing the pretreated soybeans in water until there is a planar concave in the center of the bean cotyledon, and taking out to obtain waterishlogged soybeans; (3) adding water to the waterishlogged soybeans and jordaning to obtain uncooked soya-bean milk, boiling the uncooked soya-bean milk for 1-3 min to obtain cooked soya-bean milk, immediately adding water and cooling to 63-67 DEG C within 10-15 seconds so as to obtain a serous fluid; (4) adding a coagulating agent into the serous fluid, carrying out thermal insulation for 10 min, and takingout to obtain bean curd pulp, and discharging water from the bean curd pulp through a flip self-pressing mode to obtain a semi-finished product; and (5) adding the semi-finished product into boiled cooking liquor and waiting for 3-5 min to obtain the porous tasty bean curd. The prepared bean curd has uniform aperture, good local flavor, and excellent yield and elasticity.

The invention discloses an electrostatic spinning porous carbon material and a preparation method thereof. The preparation method of the electrostatic spinning porous carbon material comprises the following steps that silk fibroin, polyoxyethylene, potassium chloride and anhydrous formic acid are taken for being uniformly mixed to obtain a spinning solution; the spinning solution is subjected to electrostatic spinning to obtain an electrostatic spinning membrane, and the spinning voltage is 14-18kV; and high-temperature carbonization is carried out on the electrostatic spinning membrane in a nitrogen atmosphere to obtain the electrostatic spinning porous carbon material. The electrostatic spinning porous carbon material is prepared from a nitrogen element, and the content of the nitrogen element is 6-22 wt%. The preparation method of the electrostatic spinning porous carbon material is convenient to operate, the preparation process is easy to control, the technological process is short, and the obtained electrostatic spinning porous carbon material has good hydrophilic performance and pore structure.