50results about How to "Low manufacturing process cost" patented technology

The invention discloses a biomass hard carbon negative electrode material and a preparation method and application thereof. According to the method, the waste biomass is used as a raw material, selective dissolution regulation of hemicellulose in plants is realized only through pretreatment of the organic acid with proper concentration under the condition of not damaging natural structures of the plants, and cellulose and lignin components are reserved; the biomass hard carbon negative electrode material with improved performance can be obtained through two-step carbonization and acid-base treatment, so that the assembled sodium ion battery has excellent electrochemical performance, and under the condition that the current density is 50mA / g, the first discharge capacity is 286-345mAh / g, the first coulombic efficiency is 92-95%, and the cycle capacity is stable. The method can be used as a universal strategy for optimizing the electrochemical performance of the biomass hard carbon, the preparation process is low in cost and simple, and large-scale application and production of high-performance sodium ion batteries are facilitated.

The invention provides a rapid visual D-limonene detection method and application thereof, and belongs to the technical field of analytical chemistry, the method comprises the following steps: uniformly mixing ethanol and water to form a solvent system, sequentially adding template agents Pluronic P123 and Pluronic F127, phloroglucinol, 1, 3, 5-trimethylbenzene and ethylenediamine, and uniformly stirring at room temperature; after the reaction is completed, washing, centrifuging, drying and calcining an obtained sample to obtain DNCzyme; the method comprises the following steps: adding TMB, H2O2 and DNCzyme into an acetic acid-sodium acetate buffer solution HAc-NaAc, finally adding D-limonene, incubating, and carrying out visual detection on the solution. The method for detecting the D-limonene through colorimetric sensing is rapid, simple, convenient, low in cost, high in sensitivity and good in selectivity, and visual detection is achieved by combining a smart phone.

The invention discloses a method for achieving titanium-aluminum alloy additive manufacturing through an electron beam spot melting process. The method comprises the steps that firstly, after a three-dimensional CAD model of a target product is established, layering slicing is conducted; 2, preheating and heat preservation of the substrate; 3, spreading powder and preheating a powder bed; 4, additive manufacturing process parameters are set, powder melting and solidification are carried out point by point, and a single-layer solid sheet layer is obtained; 5, carrying out secondary preheating treatment on the powder bed and descending the forming platform; and 6, repeating the process to obtain the titanium-aluminum alloy. A discrete point melting technology is adopted to replace a traditional line scanning continuous melting technology, point melting and solidification are carried out on a target area in a powder bed one by one, the size of a molten pool is reduced, the cooling speed of the molten pool is increased, the heat affected zone range of the edge of the molten pool is reduced, the influence time of the heat affected zone is shortened, and the uneven structure caused by aluminum element volatilization and phase change is avoided; and meanwhile, single-process printing of the titanium-aluminum alloy complex part is achieved, the difficulty and cost of the additive manufacturing process are reduced, and the method is suitable for the field of titanium-aluminum alloy additive manufacturing.

The invention provides a high-efficiency preparation process of a short-fiber hard thermal-insulation composite material. The high-efficiency preparation process comprises the following steps: immersing carbon fibers of which the raw material is short fibers into a modifier for surface treatment, and then sequentially carrying out metal modification, carbon layer deposition and inorganic matter layer coating on the surface, carbon fibers and inorganic materials are subjected to composite hot pressing, then high-temperature graphitization treatment is carried out, and the short fiber hard heat preservation composite material is obtained. According to the process, the connection strength between the short fibers and the inorganic material can be improved, the mechanical performance of the composite material is improved, the graphitization degree is higher, and the good heat preservation performance is achieved.

The present invention relates to the field of semiconductor technology, and in particular to a gallium oxide diode. The gallium oxide diode comprises a gallium oxide wafer, a cathode electrode, an anode electrode and a P-type semiconductor. The gallium oxide wafer comprises a gallium oxide substrate layer and a gallium oxide epitaxial layer. The P-type semiconductor is n layers, where n is the number of layers and n≥2. The present invention provides a multilayer P-type semiconductor, and one end of the P-type semiconductor forms a PN junction with the gallium oxide epitaxial layer, and the PN junction can compensate for the charge on the depletion side. Through the depletion effect of the PN junction, non-ideal factors such as dangling bonds introduced by etching and fixed charges introduced by etching damage in the gallium oxide diode can be passivated, thereby reducing the resistance degradation caused thereby and improving the stability of the device. At the same time, the other end of the P-type semiconductor is connected to the anode electrode to form an equipotential body, which can promote the depletion of the side PN junction, and can also disperse the high electric field of the device from the original side to the end face, thereby achieving the purpose of reducing the electric field strength of the entire device.

The invention provides a preparation method of a zinc alloy surface corrosion-resistant organic composite coating, and aims to prepare a high-corrosion-resistant coating on the zinc surface through in-situ growth, so that the binding force between the zinc alloy coating and a matrix is improved, and meanwhile, the corrosion resistance of the zinc alloy coating is greatly improved. The preparation method comprises the following steps: carrying out electrolytic oxidation on the surface of the zinc alloy by regulating and controlling the oxidation current density in a sodium hydroxide and sodium carbonate solution with a specific ratio, carrying out sealing treatment in combination with PFDTMS, and preparing the organic composite coating on the surface through in-situ growth. Therefore, the corrosion of the zinc alloy is optimized, and the zinc alloy is suitable for being used in a highly corrosive environment.

The invention provides a composite gel fire preventing and extinguishing material for coal seam fire treatment and a preparation method. The composite gel fire preventing and extinguishing material comprises a first base material, a second base material, a solvent, a colloid material and an auxiliary agent, wherein in parts by weight, the first base material is 270-540 parts, the second base material is 90-180 parts, the colloid material is 15-30 parts, and the auxiliary agent is 30-60 parts; the mass ratio of the first base material to the solvent is 2: 5. The CO inhibition rate of the composite gel fire preventing and extinguishing material is good, moisture is rapidly vaporized at high temperature when part of the composite gel fire preventing and extinguishing material is not gelatinized, the surface temperature of a coal seam can be rapidly reduced, and dehydrated residual solids form an isolation layer to prevent coal oxygen contact; part of the composite gel fire preventing and extinguishing material enters a high-temperature area in a coal seam fire source through coal seam cracks, oxygen is isolated, coal is oxidized, and the exothermic reaction is terminated. The invention further provides a preparation method of the material. The preparation process is simple and low in process cost.

The invention belongs to the technical field of integrated photoelectronics, and discloses an MOS (Metal Oxide Semiconductor) type silicon-on-chip electro-optical modulator based on colloid nanocrystals and a preparation method thereof. The silicon waveguide layer is arranged above the waveguide cladding layer; optical couplers used for inputting and outputting optical signals are arranged at the two ends of the silicon waveguide layer; the dielectric layer is arranged above the silicon waveguide layer in a covering manner; a colloidal nanocrystalline layer disposed over the dielectric layer; the upper electrode layer is arranged above the colloid nanocrystalline layer; the lower electrode layer is communicated with the silicon waveguide layer; and the dielectric layer is used for changing the polarization state according to an external voltage and controlling the inductive charge concentration in the colloid nanocrystalline layer and the silicon waveguide layer through the polarization state. The room-temperature liquid phase processing procedure of the colloidal nanocrystal is simple, and is completely compatible with a silicon-based CMOS (Complementary Metal Oxide Semiconductor) process, so that low-cost and large-scale integration can be carried out; the colloidal nanocrystal has a plasma dispersion effect stronger than that of a silicon material, is easy to realize an ENZ effect, and can realize high modulation efficiency and high modulation depth.

The invention discloses a hand electronic skin based on an ultrasonic transducer and a three-dimensional gesture reconstruction method thereof, and relates to the technical field of man-machine interaction. The hand electronic skin comprises a viscous layer, a flexible strain sensor layer, a flexible electrode, a composite electrode, a surface packaging layer and an ultrasonic transducer which are arranged on the surface of the hand skin; the flexible strain sensor layer comprises a plurality of flexible strain sensors, and each finger joint is provided with a flexible strain sensor used for independently measuring the bending angle of the finger joint. The ultrasonic transducer is partially embedded in the surface packaging layer and used for emitting ultrasonic waves. The electronic skin is mainly composed of a flexible stretchable strain sensor and a piezoelectric micromechanical ultrasonic transducer, and is simple and reliable in structure, low in manufacturing cost, free of interference of ambient light, low in time drift rate and convenient and comfortable to wear. The hand electronic skin is suitable for the fields of virtual reality, robot control, medical rehabilitation and the like, and the interaction experience and operation convenience of the user can be remarkably improved.

The invention relates to the technical field of zinc metal battery negative electrodes, in particular to a preparation method of a zinc metal battery negative electrode protective layer capable of regulating and controlling double electric layers, which comprises the following steps: pre-roasting commercial diatomite at a certain temperature, immersing into an alkali solution, fully stirring for reaction, washing to be neutral, and drying; roasting the dried diatomite again, removing impurities and residual alkali, and sieving for later use; fully mixing the treated diatomite with a binder polyvinylidene fluoride and a conductive agent Super-P, and adjusting the concentration of the slurry by using a solvent N-methyl pyrrolidone; constructing the slurry on a zinc foil in a spin coating manner to obtain a zinc metal battery negative electrode; the zinc metal battery negative electrode protective layer is provided with micron / nano holes serving as zinc ion migration channels, in addition, polar bonds, namely Si-O bonds and holes, constructed by a diatomite roasting and alkali treatment process can synergistically adjust a double electrode layer on the surface of a zinc negative electrode, so that the zinc ion desolvation process is accelerated, and the cycle life is greatly prolonged. The preparation process is extremely low in cost and suitable for large-scale production.

This invention relates to a layer-by-layer composite electrochromic thin film of Mo-WO3 and Bi-WO3 and its preparation method. The method includes: dissolving tungstic acid in hydrogen peroxide solution to obtain a peroxytungstic acid solution; adding a Bi-containing substance to the peroxytungstic acid solution and heating until the Bi-containing substance is completely dissolved to obtain a bismuth-doped peroxytungstic acid sol; adding a Mo-containing substance to the peroxytungstic acid solution and heating until the Mo-containing substance is completely dissolved to obtain a molybdenum-doped peroxytungstic acid sol; spin-coating the bismuth-doped peroxytungstic acid sol onto a conductive glass substrate and calcining to obtain a bismuth-doped WO3 thin film; and spin-coating the molybdenum-doped peroxytungstic acid sol onto the bismuth-doped WO3 thin film and calcining to obtain a Mo-WO3 / Bi-WO3 thin film. This invention employs a layer-by-layer composite structure design. The Bi-WO3 bottom layer significantly enhances the film-substrate adhesion and improves cycle stability; the Mo-WO3 surface layer ensures high optical modulation rate, fast response, and memory effect, achieving a synergistic performance improvement.

The invention aims to provide a preparation method of a perovskite solar cell based on a Moire lattice structure and a perovskite solar cell with a perovskite thin film prepared based on the method as an optical active layer. The perovskite solar cell which is low in light absorption loss, high in short-circuit current density and high in energy conversion efficiency is produced through the thin film preparation method which is simple in process and low in cost. The method provided by the invention has the following three advantages: 1) the method for preparing the diffraction grating by imprinting is adopted, so that the perovskite film is more compact and has higher crystallization strength; 2) the Moire lattice structure improves the light collection efficiency, and enhances the short-circuit current and energy conversion efficiency of the perovskite solar cell; and 3) the Moire lattice structure is based on a light interference principle, and the optical path of sunlight in the perovskite thin film is prolonged, so that a thinner semiconductor thin film is allowed to be adopted in a solar cell device, the lead content in the perovskite solar cell is reduced, more raw materials are saved, and the perovskite solar cell is more environment-friendly.

The utility model discloses a flat plate split type air conditioner, which relates to the technical field of air conditioners and comprises an indoor unit and an outdoor unit, the indoor unit is mounted in a room, the outdoor unit is arranged outside the room, and a water supply pipe and a water return pipe which are used for refrigerating / heating agent circulation are connected between the indoor unit and the outdoor unit. The indoor unit comprises a flat plate split type air conditioner indoor unit body, and the outdoor unit comprises a fluorine medium refrigerating / heating system and a water medium refrigerating / heating system. The flat plate split type air conditioner indoor unit body is vertically arranged on a wall, a water supplementing opening and an automatic exhaust valve are arranged at the upper end of one side of the flat plate split type air conditioner indoor unit body, and a condensate pipe is arranged on one side of the lower end of the flat plate split type air conditioner indoor unit body. According to the flat plate split type split air conditioner indoor unit, the indoor unit body has no pressure, no noise and no accumulated dust exist in operation, the manufacturing cost of the indoor unit is greatly reduced, and the use comfort degree is greatly improved.

The utility model provides a bus capacitor, motor controller and electric drive assembly, relates to motor control technical field, the bus capacitor, including bus shell, capacitor rolled core package, positive pole connecting row and negative pole connecting row, the annular bus shell constitutes the annular accommodation groove, the capacitor rolled core package is the annular monomer structure formed by one-time winding, the positive pole connecting row is connected with the negative pole connecting row, and the negative pole connecting row is connected with the positive pole connecting row. The capacitor rolled core package is arranged in the annular containing groove and assembled in the annular containing groove, meanwhile, a plurality of positive tabs and a plurality of negative tabs are arranged on the surfaces of the two sides of the capacitor rolled core package respectively, and the positive connecting bar and the negative connecting bar are arranged on the two sides of the capacitor rolled core package respectively and make electric contact with the positive tabs and the negative tabs respectively. Compared with the prior art, according to the utility model, the core package is rolled by the annular single capacitor which is formed by one-time winding, so that the manufacturing process is lower in cost, better in consistency and more uniform in capacitor temperature. And the structure is simple and compact, the power density is high, and the low-impurity inductance design is realized.

The invention discloses a binary and multi-component TM-MOFs@MgH2 composite hydrogen storage material and a preparation method thereof, which belongs to the technical field of novel hydrogen storage materials. The binary and multi-component TM-MOFs@MgH2 composite hydrogen storage material preparation method provided comprises the following steps: S1, preparing a binary and multi-component transition metal TM-MOFs precursor; S2, preparing a composite hydrogen storage material: pre-ball milling the TM-MOFs precursor obtained in step S1, adding MgH2 powder material, ball milling, placing the ball-milled mixture powder in a vacuum environment for complete dehydrogenation, and obtaining a binary and multi-component TM-MOFs@MgH2 composite hydrogen storage material. Compared with pure MgH2 hydrogen storage materials, the binary and multi-component TM-MOFs@MgH2 composite hydrogen storage materials provided by the invention have a smaller reduction in hydrogen storage capacity, a significantly reduced hydrogen absorption and desorption reaction temperature, and greatly improved kinetics, which significantly improves the catalyst catalytic efficiency and the practicality of the hydrogen storage material.

The invention belongs to the technical field of magnetic suspension synchronous motors, and particularly relates to a magnetic suspension permanent magnet synchronous motor heat dissipation structure which comprises a shell, a stator part, a rotor part, a front end cover plate, a rear end cover plate, an air inlet and an air outlet, the front end cover plate and the rear end cover plate are connected to the two sides of the shell in the length direction respectively, the air inlet is formed in the rear end cover plate, and the air outlet is formed in the rear end cover plate. The rear end cover plate is provided with a first heat dissipation hole and a second heat dissipation hole, the second heat dissipation hole is connected with a heat dissipation channel, the heat dissipation channel is arranged in the shell, the position, close to the front end cover plate, of the heat dissipation channel is connected with a front end air outlet hole, the air outlet is formed in the shell, and the air outlet is connected with a one-way valve. Compared with the prior art, the heat dissipation area of the shell can be increased, internal cold air circulation is smoother, the heat dissipation efficiency is improved, and the size of the motor is reduced through the built-in heat dissipation channel.

The invention discloses civil nitrifying bacterial cellulose and a preparation method thereof, and belongs to the field of nitrocotton manufacturing. The preparation method of the civil nitrifying bacterial cellulose comprises the following steps: mixing bacterial cellulose with mixed acid, carrying out nitration reaction to obtain an acid cotton mixture, carrying out acid cotton separation and washing on the acid cotton mixture, boiling and washing, and finally dehydrating to obtain the civil nitrifying bacterial cellulose. The boiling and washing are continuously boiling with acid water and are divided into two stages: in the first stage, the boiling and washing time is 1-2 hours, the temperature is 100-110 DEG C, the acidity is 6-8 g / L, and the pressure is 0.05-0.10 Mpa; in the second stage, the boiling and washing time is 0.5-1 hour, the temperature is 120-130 DEG C, and the pressure is 0.05-0.10 Mpa. The nitrogen content of the prepared civil nitrifying bacterial cellulose is 10.7-12.2%, the whiteness is 80-88%, the viscosity is 11.5-29 mpa.s, the light transmittance is 75-85%, and the prepared civil nitrifying bacterial cellulose is subjected to a heat resistance test at 80 DEG C for 20-30 min.

The present invention relates to a "J"-shaped chassis frame specially used for snowplows. The chassis frame of the present invention is a special chassis frame for snowplows, and special hangers are designed at the front and middle parts. When snow removal equipment is installed on the whole vehicle at a later stage, the chassis does not need to be modified and can be directly installed. Secondly, the frame of the present invention is a "J"-shaped structure, and an enlarged installation space is provided in the middle part, which can more conveniently arrange a large roller sweeper and improve snow removal efficiency. Finally, the present invention adopts a highly symmetrical structure of left and right longitudinal beams, which can effectively reduce the manufacturing process cost and greatly improve the overall strength of the frame; the internal assembled crossbeam structure and multiple reinforced special plates improve the overall torsion and bending resistance of the frame.

The application provides a high-efficiency preparation process of short-fiber hard thermal insulation composite material: carbon fibers with short fibers as raw materials are immersed in a modifier for surface treatment, then metal modification, carbon layer deposition and inorganic layer coating are sequentially performed on the surface; the carbon fibers and inorganic materials are compounded and hot-pressed, and then high-temperature graphitization treatment is performed, so that the short-fiber hard thermal insulation composite material is obtained. The process can improve the connection strength between the short fibers and the inorganic materials, improve the mechanical properties of the composite material, and has higher graphitization degree and good thermal insulation performance.

An adjustable storage goods shelf relates to the field of goods shelves and comprises two vertically arranged support frames and a placing frame transversely arranged between the two support frames, the placing frame comprises two cross beams arranged in parallel and a plurality of groups of span beam structures arranged between the two cross beams in a spanning mode, each span beam structure comprises two movable beams arranged side by side, and the adjacent side faces of the two movable beams are inclined planes. A first baffle and a second baffle are vertically arranged at the two ends of the movable beam, the two baffles are located on the outer sides of the two cross beams, the second baffle is attached to the outer side of the cross beam on the side where the second baffle is located, a gap is formed between the first baffle and the outer side of the other cross beam, and the first baffle and the outer side of the other cross beam are locked through a locking piece. According to the cross beam structure, through the matching structural design of the baffles at the two ends of the two movable beams and the corresponding cross beams, the cross beams do not need to be machined, transverse adjustment of the movable beams on the cross beams is achieved, namely the distance between the two movable beams can be adjusted, and therefore the cross beam structure can adapt to the storage requirements of barrel-shaped goods with different diameters and is high in universality.

According to the non-stack CMOS image sensor and the forming method of the vertical transfer transistor of the non-stack CMOS image sensor, manufacturing of a vertical transfer transistor grid electrode, an NMOS transistor grid electrode and a PMOS transistor grid electrode is achieved at the same time through one-time deposition, and the manufacturing process cost can be reduced; the over-etching amount of polycrystalline silicon etching is controlled in a conventional planar grid electrode preparation process to obtain a polycrystalline silicon step structure of the vertical transfer transistor, and secondary ion implantation is carried out at the polycrystalline silicon step structure; therefore, the relatively uniform heavily-doped polycrystalline silicon gate of the vertical transfer transistor can be obtained under the condition of not adding an additional heat treatment process, and the process can be used for preparing vertical transfer transistors with different etching depths and is wide in application range.

The present invention discloses a urine drainage bag, characterized in that: the inner cavity bottom edge on one side of the bottom of the inner cavity of the liquid storage bag body is inclined downward to the lower edge of the inner opening of the liquid storage bag body discharge pipeline; the liquid storage bag body discharge pipeline below the inner cavity bottom edge on the other side of the liquid storage bag body is inclined downward to the upper edge of the inner opening of the liquid storage bag body discharge pipeline, and runs outward and downward from the bottom of the inner cavity of the liquid storage bag body to one side of the liquid storage bag body. The purpose of the present invention is to provide a urine drainage bag with a reasonable design, which can solve the problem that when the liquid volume of the side drainage bag is full, the bag body expands, causing the front and rear walls of the liquid storage bag body on the extension line of the inner cavity bottom edge above the side drainage pipeline to be concave inward along the inner cavity bottom edge, and has fast drainage without liquid residue. It can be blow-molded to manufacture a self-draining precision metering box, has a simple production and assembly process, is fixed and convenient to use, and is suitable for actual production and manufacturing.

The present application discloses a diffusion element and a preparation method thereof, and a projection system. The diffusion element comprises a substrate and a plurality of microlenses; the plurality of microlenses are arranged on a side surface of the substrate; wherein the distance from a position farthest from the substrate to a preset axis of at least one microlens is smaller than the distance from the center of a surface of the microlens close to the substrate to the preset axis, and the preset axis is parallel to the central axis of the substrate.

The present invention discloses a thermally conductive insulating material and a preparation method and application thereof, and belongs to the technical field of thermally conductive packaging insulating composite materials and their preparation. The present invention solves the problems of unilateral precipitation and uneven dispersion caused by adding existing diamond particles to epoxy resin, which causes the thermal conductivity and insulation performance of thermally conductive packaging insulating materials to deteriorate. The present invention first uses diamond powder wrapped with dopamine hydrochloride, and then obtains fluorinated diamond powder wrapped with perfluorosilane by polymerization reaction between tridecafluorooctyltrimethoxysilane and dopamine chains on the surface of diamond, and then adds it as a filling phase to the epoxy resin matrix, thereby improving the thermal conductivity of the epoxy resin composite material, which is expected to be used as a new thermally conductive packaging insulating material for power semiconductor electronic devices. In addition, the preparation process of the epoxy resin composite material provided by the present invention has low cost, is easy to implement, has good environmental protection, and the operation of the required instruments is simple and safe.

The invention discloses rapid detection application of ZIFs (Zinc Ion Factor) supported monatomic iron nano-enzyme to nano polystyrene microspheres, and belongs to the technical field of pollutant detection. The ZIFs supported monatomic iron nano-enzyme has peroxidase-like activity and can catalyze hydrogen peroxide and a color developing agent 3, 3 ', 5, 5'-tetramethyl benzidine to generate a color developing reaction, after nano polystyrene microspheres with different concentrations and different particle sizes are added into a reaction system, the polystyrene microspheres can be adsorbed on the ZIFs supported monatomic iron nano-enzyme, and the ZIFs supported monatomic iron nano-enzyme can be used as a color developing agent. The active sites of the nano enzyme are covered, so that the enzyme activity is reduced, and the color of the TMB in the solution becomes light, so that the rapid visual detection of the nano polystyrene microspheres is realized. The ZIFs supported monatomic iron nano-enzyme is simple in synthesis step, the colorimetric sensing detection method of the ZIFs supported monatomic iron nano-enzyme on nano polystyrene microspheres with different particle sizes is rapid and convenient, and visual detection is realized by combining with a smart phone.

The invention discloses a puffing process of dehydrated vegetables and fruits, which comprises the following steps: S1, raw material pretreatment: carrying out primary cleaning, conditioning, secondary cleaning and cooking on vegetables and fruits; then performing peeling and dicing treatment; cooking the raw materials at 70-100 DEG C for 55-65 seconds again for blanching, and then cooling to 25 DEG C or below; s2, adding baking powder and glucose, wherein the ratio of the vegetables and fruits to the baking powder to the glucose is 1: (0.05-0.057): 0.12; s3, adding color-protecting vitamin E oil which accounts for 0.03% of the total weight of the step S2, and stirring for at least two times within 35-50 minutes so as to uniformly permeate the raw materials; s4, after the step S3, drying and puffing the raw materials, and performing primary drying, secondary drying, puffing and tertiary drying in a stainless steel oven, so that the vegetables and fruits are puffed, the moisture content is reduced, and the floating rate of the puffed vegetables and fruits on the water surface can reach 90% or above; and S5, packaging and storing after the step S4.

The invention provides a preparation process for compacting a silicon carbide coating on the surface of a carbon fiber thermal insulation material, which comprises the following steps: carrying out surface treatment on a hard carbon fiber felt matrix, uniformly coating the treated matrix surface with aquadag, and carrying out carbonization treatment and graphitization treatment to form a graphite sealing blocking layer on the matrix surface; according to the preparation method, the strength of the coating covering the surface of the base body is improved, the bonding strength between the coating and the base body is effectively improved through the silicon carbide coating prepared on the basis, and meanwhile the preparation method has the advantages of being simple in process, low in production cost and the like.

This invention relates to the field of sludge treatment technology, and more particularly to a method for preparing struvite by acid leaching of phosphorus from sludge gasification residue with kaolinite assistance. The method includes the following steps: S1, calcining a mixture of kaolinite and sludge in a certain proportion at 800-1000℃ for a period of time; S2, dissolving the calcined product with an acid solution, separating the solid and liquid, and collecting the phosphorus-containing supernatant; S3, adding a certain amount of magnesium and ammonium sources to the phosphorus-containing supernatant, adjusting the pH to 9.4-10, stirring for a period of time, separating the solid and liquid, washing the filtered solid with deionized water, and drying to obtain struvite crystals. This invention introduces kaolinite before sludge calcination, increasing the phosphorus content in the calcined product, improving the utilization rate of sludge gasification residue, and solidifying heavy metals in the sludge. It avoids a large amount of heavy metals entering the phosphorus-containing supernatant during acid leaching, resulting in a stable and reliable MAP struvite material.

The present invention discloses a display panel and a driving method and a display device with switchable transmission and mirror. The display panel comprises a color film substrate, an array substrate arranged opposite to the color film substrate, and a liquid crystal layer located between the color film substrate and the array substrate. A first polarizer is arranged on the color film substrate, and a second polarizer is arranged on the array substrate. The light transmission axes of the first polarizer and the second polarizer are perpendicular to each other. The display panel comprises a plurality of pixel units, each pixel unit comprises a transmission area and a reflection area. A first pixel electrode, a second pixel electrode, and a metal wire grid polarizer formed by a plurality of metal wire grids are arranged on the array substrate. The first pixel electrode corresponds to the transmission area, and the metal wire grid polarizer and the second pixel electrode both correspond to the reflection area. The light transmission axis of the metal wire grid polarizer is parallel to the light transmission axis of the first polarizer. The present invention can not only independently control the transmission area and the reflection area, but also simplify the structure of the display panel and reduce the box thickness of the display panel.

The utility model provides a splicing type rotor structure and a tool, the splicing type rotor structure comprises a rotating shaft, and the rotating shaft is provided with a positioning hole; the multiple sections of rotor iron cores are arranged on the rotating shaft in a stacked and sleeved mode, a plurality of limiting strips are arranged in the circumferential direction of the rotor iron cores, and a limiting groove is formed between every two adjacent limiting strips; the limiting grooves are matched with the magnets; the two rotor end plates are arranged on the rotating shaft in a sleeving mode, the two rotor end plates are located at the two ends of the multiple sections of rotor iron cores which are arranged in a stacked mode respectively, each rotor end plate comprises a first connecting part and a second connecting part, and a connecting through hole is formed in each first connecting part; a fixing pin penetrates through the connecting through hole and the positioning hole to fix one of the rotor end plates at one end of the rotating shaft, and one side, deviating from the first connecting part, of the second connecting part is connected with the end face of the rotor iron core in an adhesive mode. According to the utility model, the low-cost manufacturing requirement of a long-size rotor can be met, and the applicability is high.