148results about How to "Increase the number of holes" patented technology

The present invention belongs to the field of automobile tail gas purifying technology, and is especially glass ceramic coating on metal or alloy carrier of automobile tail gas purifying treater and its preparation process. The oxides of the glass coating include silica in 25-65 wt% and boron oxide in 5.0-27 wt%, except the mixture of other 3-9 oxides selected from 17 kinds of oxides, including sodium oxide, potassium oxide, lithium oxide, aluminum oxide, calcium oxide, etc. The glass coating on the metal carrier can raise the mechanical strength and reaction activity of the catalyst effectively, and this results in saving in active component and lowered cost.

The invention relates to a technique for manufacturing the back of a non-through insulated-gate bipolar transistor chip, comprising the following steps of: (1) finishing a technique for processing the front of the non-through insulated-gate bipolar transistor chip; (2) grinding and thinning the back of a silicon chip, and removing stress; (3) injecting silicon ion, germanium ion or boron difluoride ion at the back of the silicon chip for amorphous pretreatment; (4) injecting boron ion at the back of the silicon chip; (5) carrying out furnace tube low temperature annealing; (6) adopting a sputtering or an evaporating method, generating an aluminium film at the back of the silicon chip, and carrying out alloy treatment; and (7) adopting the sputtering or the evaporating method, respectively preparing a titanium, a nickel and a silver metal layers at the back of the silicon chip. The back of the silicon chip is firstly injected with the silicon ion, the germanium ion or the boron difluoride ion for amorphous pretreatment and then injected with the boron ion for low-temperature annealing, so that the activation rate of injecting the boron impurity is improved, the conductive modulation effect for a drifting area can be enhanced, and the conducting resistance and conducting voltage are effectively reduced. The technique can be widely applied to a manufacturing technique of a semiconductor.

The invention discloses a gallium nitride based light emitting diode and a manufacturing method thereof. In the invention, a double-layer transparent conducting layer structure is designed, a first transparent extension layer is formed on a p type semiconductor layer, a p electrode is provided at a center area of an epitaxial structure layer, peripheral of the p electrode is provided with a hole structure, and a second transparent extension layer is formed in the hole structure and is connected with an n electrode to form an equipotential surface. After current is injected from the p electrode, the current diffuses to a whole light emitting surface through the first transparent extension layer and flows to an n type layer through the p type semiconductor layer, and since the second transparent extension layer and the n electrode are in a same electric potential, the current diffuses to the second transparent extension layer to reach the n electrode finally. According to the gallium nitride based light emitting diode and the manufacturing method, in a process that the current flows to the n electrode from the p electrode, the current is uniformly distributed on an epitaxial luminescent layer, a current flow through path of a P layer is shorter, simultaneously, structure of partial light emitting surface is changed, and luminescence efficiency is effectively raised.

A method for cleaning pipeline features that a bowl-shaped cleaning part is driven by liquid stream to move in a pipeline, its edge can generate the liquid jet, and its vibration can squeeze the dirt and generate holes in fluid, so removing the dirt from the inner surface of pipeline. Its apparatus is composed of an axle with axle sleeve and the elastic sheets and elastic soft sheets, which are installed to said axle.

The invention discloses a preparation method of a porous honeycomb ceramic catalyst with a high specific surface area. The porous honeycomb ceramic catalyst is prepared by taking titanium dioxide, montmorillonite and alpha aluminum oxide as carriers and ammonium metatungstate, ammonium metavanadate, cerium nitrate and palladium acetate as active components through mixing, aging, kneading, molding, drying and roasting under the accompanying of auxiliary materials, wherein the auxiliary materials comprise monoethanolamine, ammonia water, lactic acid, stearic acid, glass fibers, macromolecular polymer fibers, hydroxypropyl methyl cellulose, polyoxyethylene, citric acid and water. According to the preparation method of the porous honeycomb ceramic catalyst with the high specific surface area, the catalyst carriers are optimized in order to be adapted to application conditions of frequent temperature variation, high concentration of nitrogen oxides, high heat stability and high specific surface; the montmorillonite and the alpha aluminum oxide are used for replacing one part of the titanium dioxide, the montmorillonite has the enhancing effect and the aluminum oxide has the effect of high heat stability; and meanwhile, the macromolecular polymer fibers are used for replacing wood pulp so that a grinding tool is difficult to block in a production process and the production efficiency is improved.

The invention relates to a light-emitting component and a manufacturing method thereof. The light-emitting component contains an n-shaped bound layer, a p-shaped bound layer and an active layer, wherein the active layer is positioned between the n-shaped bound layer and the p-shaped bound layer and in a multiple-quantum well structure formed by piling multiple barrier layers and multiple well layers in a stagger way; the barrier layers are doped with p-shaped impurities to increase the number of cavities, the barrier layers which are closer to the n-shaped bound layer have lower doping concentration, and the barrier layers which are closer to the p-shaped bound layer have higher doping concentration so as to form a barrier layer structure with gradual change type doping concentration. Thelight-emitting component can enhance the combination probability of the cavities and electrons, thereby enhancing the light-emitting efficiency.

The invention aims to provide an active carbon absorbent for removing heavy metals especially mercury in flue gas and a preparation method thereof. By improving the preparation method of active carbon, the ratio of mesoporous pore canals in active carbon is increased, thus the oxidant load capacity and dispersion degree of active carbon are both improved; the performance of active carbon on absorbing mercury is enhanced, thus the mercury can be removed more easily, and moreover, the provided method has little pollution and can be applied to the industry.

The invention discloses a preparation method of a bacteriostatic air purifier. The preparation method comprises the following steps: step I: acid leaching, calcining, and producing modified maya blue;step II: fermenting various plants by virtue of probiotics, filtering a fermented solution, and preparing plant enzymes; step III: under a condition of argon charged, dissolving zirconium dioxide andtitanium dioxide in tartaric acid, and then preparing a lanthanum-doped composite photocatalyst by virtue of the coupling bonding of lanthanum oxide; step IV: mixing tea polyphenols, quercetin and hydrazine carbonate according to a weight ratio of 1: (1.2 to 1.6): (0.3 to 0.5), condensing by using a coating agent, and preparing a coated synergist; and step V: mixing 20 to 30 parts of modified maya blue, 40 to 60 parts of plant enzymes, 12 to 16 parts of lanthanum-doped composite photocatalyst, and 15 to 20 parts of coated synergist, thus obtaining the air purifier. By adopting the preparationmethod, the pathogenic bacteria can be effectively eliminated, the air spreading route of the pathogenic microorganism can be blocked, the air pollutants can be effectively degraded, and the air quality can be improved.

The invention discloses an epitaxial wafer of a light emitting diode and a manufacturing method thereof and belongs to the technical field of semiconductors. The epitaxial wafer comprises an underlayer and a low temperature buffer layer, a high temperature buffer layer, an N type layer, an active layer, an electronic resisting layer and a P type layer which are stacked on the underlayer in sequence, wherein the electronic resisting layer comprises a GaN layer and at least two AlGaN layers stacked on the GaN layer; the Al component content of the AlGaN layers increases or reduces layer-by-layer in the growing direction of the epitaxial wafer. According to the invention, the electronic resisting layer is arranged, so that the energy level height of the electronic resisting layer increases or reduces layer-by-layer, the resisting function of injecting the active layer to a hole is weakened, electrons can be prevented from leaking from a quantum well, and the luminous efficiency is improved.

The invention relates to a superfine denier polyurethane filament and the method to manufacture. The filament is an island type superfine denier polyurethane filament that the low density polyethylene as see const and the polyurethane as the island const. And the weight ratio of polyethylene is from 0.4 to 1.5:1. The filament number after the island separated is from 0.08 to 0.3dtex. And the density of finished silk fiber product is 150-200dtex; breakdown strength of fiber is 1.9-2.1CN/dtex; the elongation at break is 100-150%. The invention is easy to be industrialization manufactured.

The invention relates to the field of automatic separation of coal and gangue, in particular to an automatic coal and gangue separation system and method based on temperature changes. The automatic coal and gangue separation system based on temperature changes comprises a conveying belt, a collection hoper, a feeding device, a queuing device, a detection device, a gas treatment device and a motionexecution device. The feeding device comprises a small suspension-type vibrating screen. The queuing device comprises a lining device, a gathering support and an isolation plate. The detection devicecomprises a thermal infrared temperature sensor, a data acquisition card and a computer. The gas treatment device comprises a gas inflation box, a gas desorption device, a gas collection box, a gas filtering and purification box and a gas pressurizer. According to the automatic coal and gangue separation system and method based on temperature changes, on the basis of the principle that the temperature of coal is increased after the coal absorbs gas and is decreased after the coal desorbs the gas and the temperature of gangue is not changed due to the fact that the gangue does not react with gas, the coal is separated from the gangue, the gangue with the temperature unchanged is separated out and is removed through the motion execution device; and the automatic coal and gangue separation system and method based on temperature changes are high in separation efficiency, capable of separating various types of coal and high in adaptability, and water is not needed.

The invention belongs to the technical field of building materials and provides a phase change heat insulation composite hollow building block. Three rows of mutually staggered holes are formed in a building block body in total, and the holes in the row near the indoor side are blind holes and are used for filling a gypsum-based phase change material; and the holes in the other two rows are through holes, thereby forming air spaces inserted with heat insulation material plates at middle parts. According to the phase change heat insulation composite hollow building block provided by the invention, by reasonably selecting a hole structure, the mechanical properties of the composite hollow building block can be ensured, and heat insulation, heat isolation and heat accumulation performances of the building block can be also improved to a greatest extent; the prepared gypsum-based phase change material is less prone to causing leakage of the filled phase change material, has good compatibility with the material of the building block main body, and is used for solving the problem that the heat capacity of a wall body built by traditional hollow building blocks is reduced due to improved heat insulation performance; and furthermore, by reasonably selecting the phase change material with great phase change latent heat and appropriate heat conduction coefficient against climatic conditions in different regions, the best performance of the phase change material is realized, so that indoor heat comfort is improved and the energy consumption of a building is reduced.

The invention provides a method for extracting fulvic acid salt from photocatalyst activated lignite. The method comprises the following steps: uniformly mixing lignite powder and water, adding alkalito regulate the pH value to be 10-11, stirring for 2-3 hours at a temperature of 50-80 DEG C, and performing solid-liquid separation to obtain a humate solution; and adding an oxidizing agent and a photocatalyst, and stirring under ultraviolet irradiation for 3-5 hours, thereby obtaining the fulvic acid salt product. The method disclosed by the invention is simple in production process, low in cost, high in humic acid activation rate in lignite, high in fulvic acid salt extraction rate and suitable for popularization and application in agricultural production.

The invention discloses a porous rapid combustion bio-combustible substance particle and a preparation process thereof. The particle comprises, by weight, 40-50 parts of corn straws, 30-40 parts of wheat straws, 22-30 parts of cotton seed hulls, 18-24 parts of peanut hulls, 25-35 parts of bagasse, 16-20 parts of edible fungi residue, 8-12 parts of activated kaolin, 13-17 parts of gamma-aluminum oxide, 16-20 parts of ammonium bicarbonate, 10-14 parts of polyacrylamide and 1-3 parts of kindling agents. The preparation process of the particle includes the steps: S1 crushing biomass materials, soaking the crushed biomass materials by ammonium hydroxide, and exploding soaked biomass materials by steam; S2 mixing and expanding the biomass materials, the activated kaolin, the gamma-aluminum oxide, the ammonium bicarbonate and the polyacrylamide, performing press forming on the mixed and expanded materials, roasting the formed materials at the temperature of 150 DEG C until the porosity of a green body reaches 20-25%, and spraying the kindling agents. According to the particle, the biomass materials are treated by combining an ammonium hydroxide soaking technology and a steam explosion technology, inner gaps of the biomass materials are enlarged, an irregular porous structure is formed by the aid of thermal decomposition reaction between the ammonium bicarbonate and the polyacrylamide,and complete combustion of fuels is facilitated.

The invention discloses a light emitting diode epitaxial wafer and a preparation method thereof, which belong to the technical field of semiconductors. The epitaxial wafer comprises a substrate, a buffer layer, an un-doped GaN layer, an N-type GaN layer, multiple quantum well layers, an electron barrier layer and a P-type GaN layer, wherein the multiple quantum well layers comprise multiple firstsub layers; each first sub layer comprises a quantum well layer and a quantum barrier layer; the quantum barrier layer which is the closest to the electron barrier layer comprises multiple second sublayers and a third sub layer; each second sub layer comprises a fourth sub layer, a fifth sub layer and a sixth sub layer; each fourth sub layer is an AlGaN layer; each fifth sub layer is a GaN layerwith Mg and In doped at the same time; the In doping position in each fifth sub layer is close to the sixth sub layer; each sixth sub layer is a GaN layer; the third sub layer is a GaN layer with Mg and In doped at the same time; and the Mg and In doping concentrations in the third sub layer are higher than those in each fifth sub layer. Hole injection can be increased, and the light emitting efficiency of the LED is improved.

The invention discloses a washable waterproof moisture-permeable foam adhesive laminated fabric and a preparation method thereof. The laminated fabric comprises a modified fabric, a foam adhesive anda waterproof film from bottom to top, the modified fabric is prepared from a cotton fabric, sodium hydroxide, oxalic acid, a first modifier and a second modifier; wherein the foam glue is obtained byfoaming a foaming agent; the waterproof membrane is prepared from a pretreatment membrane, polydimethylsiloxane and cyclohexane; the pretreatment film comprises a first waterproof layer and a second waterproof layer from bottom to top. The invention discloses a washable waterproof moisture-permeable foam adhesive laminated fabric and a preparation method thereof. The preparation method is simple in process operation and reasonable in component proportion, the waterproof film with hydrophobic, waterproof and moisture-permeable performance is attached to the surface of the modified fabric through a foam glue attaching method, and the prepared attached fabric has excellent waterproof and moisture-permeable performance, high hydrophobic performance, excellent washing resistance and high practicability.

The invention belongs to the technical field of building materials and discloses a phase-change-material composite hollow building block. A building block body is made from light aggregate concrete; five rows of mutually-staggered holes are formed inside the building block, and each row of holes consists of a relatively long hole and a relatively short hole; the holes of one row close to the indoor side are blind holes and are used for being filled with gypsum-based phase-change materials, and the holes of the other four rows are through holes and are air interlayers. According to the phase-change-material composite hollow building block, through reasonably selecting a hole type structure, the mechanical properties of the composite hollow building block are guaranteed, and the heat preservation, heat insulation and heat accumulation properties of the building block can be improved; due to the prepared gypsum-based phase-change materials, the filled phase-change materials are not prone to leaking and have good compatibility with a building block main body material, so that the problem of the traditional hollow building blocks that the heat capacity of a wall body is lowered while the heat preservation property is improved is solved; aiming at climatic conditions of different regions, the phase-change materials with large phase-change latent heat and appropriate coefficient of heat conductivity are reasonably selected, so as to exert the optimal performance of the phase-change materials, so that the indoor heat comfort is improved, and the energy consumption of buildings is lowered.