200results about How to "Improve preparation efficiency" patented technology

The invention relates to a preparation method of a chitosan hydroxybutyl derivative. Chitosan is used as a raw material; 1,2-epoxybutane is used as an etherifying agent; the hydroxybutyl modification of the chitosan is performed in an isopropanol aqueous solution dispersion system under microwave action with controlled reaction temperature and time; a chitosan derivative, hydroxybutyl chitosan, is successfully prepared; the preparation period is greatly shortened, and the preparation efficiency is increased. During the reaction, the hydroxybutyl modification of the chitosan is performed orderly under the microwave action and with controlled reaction temperature and time, which shortens the preparation period. The product has a wider pH dissolution range, and has a soluble property in weakacid, neutral, and weak alkaline aqueous solutions, that is to say, the limitation that chitosan is only soluble in acids or acid solutions is improved; the aqueous solution of the product has temperature sensitivity, can be transformed between an aqueous solution and hydrogel by adjusting the temperature; and the product is widely applicable to fields of biomedicine, tissue engineering, pharmaceutical carriers, chemical engineering, food, cosmetics, etc.

The invention relates to a method and a device for preparing a continuous transparent conductive carbon nanotube film. In the device, a water tank is connected with a quartz tube in a tubular furnacevia water seal chemical vapor reaction; a spindle shaft of a spindle film is installed on a seal water surface and rotates driven by a motor; the spindle shaft and the motor can be mounted in a smalltrough or on a bracket of the water surface; the mixed solution of ethanol, ferrocene and thiofuran are injected in a carrier gasflow of H2 with the speed of 200-4000ml/min to react at a high temperature of 900-1600 DEG C; the tubular continuous carbon nanotube film synthesized by reaction is spinned by the spindle shaft, and the spinned carbon nanotube film can be resolved; the size of the carbontube film is correlated to the size of the reactor, and the size of the carbon tube film can be adjusted by adjusting the reaction parameter as for special reactors; and the continuous transparent conductive carbon nanotube film of different structures can be prepared by altering the chemical mixture ratio of the reacted solution. The invention ensures that the continuous transparent conductive carbon nanotube film can be prepared in one step, has high preparation efficiency and simple reaction devices, and is suitable for large-scale production of carbon nanotube films.

Preparation of Al-Si-Cu alloy metallography sample and display organize method, it includes the following steps: a. rough grinding: using size reduction water sandpapers in turn, the samples are accomplished at least two times water polished, and after each sandpaper changing rotate 90 degree, until eliminating the scratch of the previous process, and before sandpaper changing, the samples are cleaned with water; b. electrolytic polishing: using the electrolytic polishing machine, polish at least two times, and after each time, rinse and cool with water; c. flannel polishing: samples polish on the single direction with the polishing pasted silk cloth; d. chemical etching: the etchant is dropped on the sample surface, eroded using wipe-mop method. Compared with the existing technologies, the advantages of the invention is to take electrolytic polishing and flannel polishing at the same time, combining chemical corrosion, optimized selecting the etchant of HF:HCl:H2O=2:3:18, to successful prepare metallographic examination samples. It is a high efficiency for sample preparation, low labor intensity, and it is the technology to obtain a very clear and integrity crystal boundary.

The invention discloses a heat conductive composite material with a high volume fraction. The composite material is characterized by being composed of a heat conductive filling material, which is irregularly stacked to form a heat conductive network and accounts for 90 to 99% of the total weight of the composite material, and a polymer adhesive, which is dispersed in the cavities in the heat conductive network and accounts for 1 to 10% of the total weight of the composite material, wherein the heat conductive filling material is high heat conductive carbon-base micro nano powder. The moulded products can be prepared through the steps of direct mixing and hot press molding, and the preparation efficiency is high. The preparation of the composite material is simple and convenient. Moreover the content of the high heat conductive carbon-base micro nano powder filling material is high, so the composite material can meet the realistic requirements on massive production. The prepared heat conductive composite material has an excellent heat conductive performance and mechanical properties, also has a certain electric conductive performance, and can be used in fields like 3D printing materials, notebook, large power LED luminescence, panel display, digital camera, and mobile communication products and related compact and high-speed electronic elements.

The present invention discloses a method for rapidly preparing a large-area and uniform black silicon material through pulsed laser grating type scanning, and a device thereof. The method comprises the following steps: 1, placing a silicon substrate in a black silicon preparing environment; 2, shaping laser beams, converging the laser beams into a strip light spot to irradiate a surface of the silicon substrate; 3, adopting the laser to carry out grating type scanning for the surface of the silicon substrate, growing a microstructure on the surface of the silicon substrate to form the black silicon. With the method and the device provided by the present invention, the black silicon can be directly prepared on the 2 inch silicon substrate, 4 inch silicon substrate, or larger silicon substrate through the one-time scanning, the surface microstructure of the prepared black silicon has good uniformity, and the method can meet the actual requirements of mass production.

The invention discloses a solar cell laminated passivation structure. The laminated passivation structure comprises a silicon wafer, and an aluminum oxide layer, a mixed passivation layer and a passivation layer which are sequentially arranged on the back surface of the silicon wafer, wherein the aluminum oxide layer is formed through a PECVD method; and the mixed passivation layer is formed by bombarding the aluminum oxide layer by plasmas obtained by ionizing a hydrogen-containing material. The invention also discloses a laminated passivation solar cell which comprises the solar cell laminated passivation structure. By implementing the method, dangling bonds on the back surface of the silicon wafer can be effectively removed, the surface state is reduced, and the efficiency of the solarcell is improved.

The object of the present invention is to provide a method for integrating large-scale silicon-based lithium niobate thin film electro-optic modulator arrays in view of the deficiencies of the prior art. By using the method, the preparation process difficulty of the lithium niobate crystal layers is reduced, the precision requirement for the bonding of lithium niobate and silicon is reduced, and the preparation and bonding of the large-scale array-type lithium niobate crystal layers can be simultaneously completed at one time, so that production efficiency of the lithium-based lithium niobatethin film electro-optic modulator arrays is greatly improved; by structurally designing and optimizing the silicon crystal layer, the light can be naturally alternated and mutually transmitted in thesilicon waveguide and the lithium niobate waveguide, so that a high-performance lithium niobate film electro-optic modulation effect is achieved; and in addition, the advantages of standardized silicon-based integration technology maturity are used in the method, and the complex chip preparation process is concentrated on the silicon crystal layer, so that the process error in the chip fabricationprocess can be reduced, and performance stability of the entire silicon-based lithium niobate film electro-optic modulator array is ensured.

The invention discloses a growth method and a growth device for bar-shaped sapphire crystals. The growth method comprises the steps as follows: in step one, quantitive high purity sapphire blocks or powder are arranged in a melting pot, and then the melting pot is put in a crystal growing furnace; an edge defined film-fed die is arranged in the melting pot, and the cross section of the guide die is circular; in step two, the crystal growing furnace is vacuumized; in step three, a primary heater controls the temperature of the crystal growing furnace to rise to 2000 to 2100 DEG C so as to melt the sapphire; in step four, seed crystals are added, and seeding is carried out; in step five, crystal growth is carried out until the crystal growth is finished, wherein, the speed ranges from 10 to 100mm/h; in step six, crystal bars are annealed; in step seven, temperature drops slowly, and the speed ranges from 10 to 60 DEG C/h; and in step eight, the crystal bars are taken out after the temperature in the furnace drops to the room temperature. The growth method and the growth device for the bar-shaped sapphire crystals can obtain the bar-shaped sapphire crystals, and can effectively improve the preparation efficiency of the sapphire crystals. The crystals that grow by adopting the growth method, and can be used as substrates for manufacturing LEDs (Light Emitting Diode) and LDs (Laser Diode) after shape processing.

The invention discloses a method for preparing a continuous surface-shape spiral phase plate, and relates to the field of micro machining, spinning optics and the like. In order to overcome the defects of low preparation efficiency, high cost and the like during preparation of the spiral phase plate in the prior art, the invention provides a novel method for preparing the continuous surface-shape spiral phase plate. According to the method, quantitative combination is performed on a target surface phase to form a mask structure, and the mask structure is utilized to realize modulating quantity of illumination, so that the preparation of the continuous surface-shape spiral phase plate can be realized by utilizing single-time exposure, and the method is a novel method which is low in cost, high in efficiency, practical and relatively large in application prospect.

The invention discloses a growth method and equipment of a sapphire crystal. The growth method comprises the following steps of: step S1, placing a high purity sapphire lump material or powder material of a set weight into a crucible, and then placing the crucible into a crystal growth furnace, wherein a guide die is arranged in the crucible; step S2, vacuumizing the crystal growth furnace; step S3, controlling the temperature rise of the crystal growth furnace to 2,000-2,100 DEG C through a main heater until sapphire is smelted into a fusant; step S4, discharging a seed crystal, and carrying out seeding; step S5, growing the crystal at the speed of 10-100 mm/h until the crystal growth ends; step S6, carrying out annealing treatment on a crystal bar, wherein the annealing temperature is 1,600-2,000 DEG C, and the annealing time is for 10-20 hr; step S7, slowly cooling at the speed of 10-60 DEG C per h; and step S8, cooling the temperature in the furnace to room temperature, and taking out the crystal bar. According to the growth method and equipment of the sapphire crystal provided by the invention, a bar-shaped sapphire crystal can be prepared, and the utilization rate of the sapphire crystal is effectively improved. The crystal which grows by using the method is subjected to forming and processing and can be used, as a substrate, for manufacturing LED (Light Emitting Diode) and LD (Laser Diode) devices.

The embodiment of the invention relates to a cellulose nanocrystal and a preparation method thereof based on an oxidation reduction system. The preparation method comprises the following steps: swelling and crushing cellulose raw materials, and washing; dispersing the pretreated cellulose raw materials into a water solution containing an oxidant and a reducing agent, so as to generate hydrolysis reaction; and carrying out post-treatment on the obtained hydrolysate, so as to obtain stably dispersed cellulose nanocrystal suspension liquid. According to the preparation method, the reducing agentand the oxidant are matched as an aid to participate in the hydrolysis reaction of cellulose, and the activation energy required by the oxidant for destroying an amorphous region is reduced by virtueof the interaction between the oxidant and the reducing agent in the reaction system, so that the reaction rate can be increased under relatively mild reaction conditions; and by adding the reducing agent, the preparation efficiency is improved to a certain degree, the use amount of the oxidant is reduced, the preparation energy consumption is reduced, and the preparation cost is saved.

A procedure customization method for project management includes three major steps: firstly, establishing workflow templates of departments; secondly, using the workflow templates based on the departments to establish a workflow template library of the company; and thirdly, selecting departments related to a certain kind of document so as to determine businesses of relevant departments when the workflow template of that kind of data document is built, selecting the workflow template of departmental businesses related to the kind of the data document from the workflow template library according to correlation degree between document type and business of every department, and finally composing an examining and signing procedure of that kind of document according to the sequence of examining and signing. The procedure customization method for the project management overcomes defects of large procedure formation workload and difficulty in maintenance, realizes reorganization of the existing procedure, optimizes the existing procedural model, finally forms the workflow template library meeting examining and signing functions of enterprises and has better practical value and wide application prospect in the technical field of computers and communications.

The invention relate to a novel method for preparing a high quality graphene material, and aims to satisfy the massive needs of high quality and low cost graphene. According to the preparation method, physical parameters such as mixed solution surface tension, viscosity, and the like should be maintained in a certain range; in realtime measurement, the surface tension and viscosity can be adjusted at the same time, or various raw materials can be added at random. Shearing and stirring equipment such as shearing emulsifying machine is adopted to shear and stir the raw materials, and then an ultrasonic wave treatment is adopted to obtain graphene dispersion liquid. The obtained graphene has a very large transverse dimension and extremely high concentration, the thickness is within four layers; due to the adopted non-oxidation method, the conductivity of graphene is high; the method is simple, no complicated technology or procedure is used, and the method is suitable for massive industrial production.

The invention discloses a preparation method of a semiconductor oxide nanometer particle doped carbon nitrogen/MOF nanometer composite material and application thereof to electrocatalysis nitrogen fixation, and belongs to the technical field of nanometer composite materials and electrocatalysis. The preparation method includes the steps that with 2,6-dipicolinic acid, copper nitrate and cobalt nitrate being raw materials, CuCo-MOF nanometer crystals are synthesized at room temperature and heated under the atmosphere of air to prepare the composite material. The raw materials used for preparinga catalyst are low in cost, the preparation technology is simple, reaction energy consumption is low, and industrialized application prospects are realized. The catalyst is used for efficient electrocatalysis nitrogen fixation, and has good electrochemical nitrogen fixation activity and electrochemical stability.

The invention discloses a three-dimensional grid core material woven fabric. The three-dimensional grid core material woven fabric is composed of a first face layer fabric, a second face layer fabric and a core layer, wherein the first face layer fabric and the second face layer fabric are woven through weft and warp made of inorganic nonmetallic materials, and the core layer is used for connecting the first face layer fabric and the second face layer fabric. The low-density weft and warp of the first face layer fabric are interwoven in a tabby structure mode, a plurality of pieces of warp in adjacent sections are tied respectively to form stranding warp through wrap-directional filaments in a twisted-woven mode, and therefore the first face layer fabric which is of a continuous mesh grating-shaped structure is formed. Core layer filaments are distributed in a continuous V-shaped structure mode in the warp direction and are continuously and alternately distributed in an I-shaped or V-shaped mode in the weft direction, corresponding warp and weft of the first face layer fabric and the second face layer fabric are vertically connected at intervals, and the three-dimensional grid core material woven fabric is formed. The three-dimensional grid core material woven fabric has the advantages that the structure is advanced and reasonable, when used as core materials for manufacturing light building members, the three-dimensional grid core material woven fabric is good in compatibility for foaming cement or gypsum or other else, pouring is convenient, tamping is easy, and the strength of a produced product is high.

The invention discloses a device for preparing black silicon, which comprises a reaction chamber (100), a gas flow control device (110), a pressure intensity regulation and control device (140), a cooling device (150), a coil power source component and a flat-plate power source component, and is characterized in that a quartz cover (101) is arranged above the reaction chamber (100); the lower part of the reaction chamber (100) is provided with a support platform (102) used for placing a silicon slice sample to be processed; the gas flow control device (110) comprises no less than two gas circuits (111), and working gas can be introduced into the gas circuits; the pressure intensity regulation and control device (140) comprises an air outlet (141), a mechanical pump (142) and a molecular pump (143); and the cooling device (150) is directly connected to the support platform (102). The device can be used for preparing the black silicon with high density and width-depth ratio, and is high in preparation efficiency, low in cost and automatic, simple and convenient in control.

The invention discloses a preparation method of a catalyst for photo-catalytically splitting water to produce hydrogen and relates to nano materials. The preparation method includes: placing urea into a ceramic crucible with a cover, and calcining in a muffle furnace to obtain yellow g-C3N4 polymer material; under nitrogen protection, ultrasonically dispersing the g-C3N4 polymer material into tetrahydrofuran solution, using lithium metal as the electron donor and naphthalene as the first electron acceptor, performing solution-phase stripping in the presence of halogenated hydrocarbon, adding ethanol into the reaction product after reaction to remove unreacted lithium metal, centrifuging, washing the obtained solid product, and drying to obtain g-C3N4 nano-plates; ultrasonically dispersing the g-C3N4 nano-plates into water, adding graphene oxide, continuing ultrasonic dispersion to obtain a mixed solution, transferring the mixed solution into a reaction kettle, rising temperature to 140-200 DEG C, keeping the temperature for 2-12 hours, then cooling to room temperature, performing suction filtration to obtain solid product, and performing vacuum drying to obtain the catalyst for photo-catalytically splitting water to produce hydrogen.

The invention relates to a processing method of electronic ceramic tape-casting slurry. The processing method comprises the following steps: adding a main solvent, a plasticizer, a surface lubricating agent and a bonding agent into a ball milling tank for ball milling for 2-4h, further adding electronic ceramic powder, and continuously performing ball milling for 26-32h. In the first aspect, the ball milling time is greatly reduced, and the preparation efficiency of the electronic ceramic tape-casting slurry is improved; in the second aspect, by adopting the preparation process which performs ball milling twice, the plasticizer can be fully inserted into double bonds of the bonding agent, and the opening of the double bonds of the bonding agent is better; the surface lubricating agent is also uniformly distributed in a solvent system, so that when powder is added subsequently, the powder can be effectively infiltrated and protected; in the third aspect, according to the tape-casting slurry prepared by the method provided by the invention, aggregation can be avoided during tape-casting molding of an electronic ceramic green body, and after firing of the electronic ceramic green body, the product has uniform and clear lines and a good microstructure.

The invention discloses a manufacturing method for an organic semiconductor laser based on an active waveguide grating structure, which belongs to the technical field of nanometer photo-electronic materials and devices. The manufacturing method comprises the following steps of: (1) preparing an organic solution of a fluorescent emission organic semiconductor material; (2) coating the fluorescent emission organic semiconductor solution on a substrate in a spinning way to obtain a uniform organic semiconductor film of which the thickness is 50-500 nanometers; (3) spinning a recording medium onto the organic semiconductor film obtained in the step (2) to obtain a recording medium film of which the thickness is uniform and is 50-500 nanometers; and (4) reacting a laser interface pattern with the recording medium film to form a high-quality recording medium distribution feedback structure. The method has the advantages of no need of expensive equipment, low cost, high preparation efficiency, good laser mode, low threshold value and suitability for manufacturing electric pumped semiconductor lasers.

The invention belongs to the technical field of graphite preparation, and specifically relates to a device and method for preparing graphite by a Zn/Fe flame sealed-tube method. The provided device can shorten the vacuumizing period and improve the CO2 sample collection efficiency. According to the Zn/Fe flame sealed-tube method, Zn powder is taken as a reducing agent, the shortage that when H2 orTiH2 is taken as a reducing agent, methane is generated in the system is overcome; moreover, the flame sealed-tube method can solve the problem that due to long time of an online reducing method, leakage of a vacuum system happens, the background values of the test result are reduced, and the sampling efficiency is improved.

The invention provides a system and a method for dynamically distributing gases of volatile liquid under room temperature and normal pressure. The system comprises a gas generator, a volatile liquid control device, a gas proportioning device and a gas analysis device, wherein the volatile liquid control device controls air to enter the gas generator; the gas generator converts the volatile liquid into the gases, and introduces the gases into the gas proportioning device; the gas proportioning device is connected with the gas analysis device; and the gas analysis device is connected with the volatile liquid control device by a signal feedback control line. In the system and the method, the volatile liquid control device controls the injection of the air into the gas generator to convert the volatile liquid in the gas generator into the gases, and a conversion speed, a conversion degree, an injection speed and an injection amount all can be effectively and automatically controlled, so the gas distribution efficiency is greatly improved; and simultaneously, a polytetrafluoroethylene layer is coated on the inner side of the gas proportioning device, and gas pipelines adopt polytetrafluoroethylene pipes so as to effectively reduce the absorption of the gases and improve the distribution accuracy.

The invention belongs to the technical field of luminous materials, and particularly relates to a method for preparing nano structural spherical fluorescent powder. The chemical formula composition of the fluorescent powder is Aa-xMbOc: Rex, wherein A is one or more of Sc, Y, La, Gd, Yb, Lu, Mg, Ca, Sr, Ba and Zn; M is Al or Si; Re is Ce or Eu; and a is more than or equal to 1 and less than or equal to 5, b is more than or equal to 1 and less than 20, and x is more than 0 and less than or equal to 0.06. The method comprises the following steps of: 1) preparing slurry by using oxides of A, M and Re as raw materials, and performing spray granulation; 2) heating granulation powder in flow regime by using acetylene-oxygen flame, and forming amorphous spherical powder by water quenching; and 3) in reduction atmosphere, crystallizing the amorphous spherical powder to obtain the nano structural crystal spherical fluorescent powder. The fluorescent powder does not need ball milling, and has spherical micro appearance, excellent luminous performance and important industrial application value.

The invention relates to a polar polymer negative poisson ratio foam material and a preparation method thereof, and belongs to the technical field of functional polymer foam materials. The method solves the technical problem that a preparation method of a negative poisson ratio foam material is complicated in preparation process, low in preparation efficiency and unfavorable for large-scale production and limits polymers in the prior art. The preparation method is characterized in that polar polymers are directly formed or compounded with auxiliaries and then formed to prepare a workpiece to be foamed, the workpiece to be foamed is placed into a foaming device, physical foaming agents and water are led in, and pressure is rapidly released at the temperature of 80-180 DEG C and under the saturation pressure of 3-25MPa for the saturation pressure of 0.5 hour or more to obtain the foam material. The polar polymer negative poisson ratio foam material can be prepared by one step, the methodis simple in preparation technology, high in preparation efficiency and safety, green, environmentally friendly and suitable for large-scale production, the water is used for assisting in preparation, and the negative poisson ratio foam material with a large size can be prepared.

The present disclosure provides a laser-assisted maskless high aspect ratio silicon carbide deep trench structure preparation method. The method comprises the steps of: taking a silicon carbide material to be processed; performing laser irradiation for the silicon carbide material to be processed; and performing dry etching for the silicon carbide material after laser irradiation. The method provided by the invention solves the processing difficulty of the silicon carbide high aspect ratio deep trench structure, achieves maskless etching, is simple in process, improves the preparation efficiency and selectively repeats the laser irradiation and dry etching steps to meet higher demands for the silicon carbide trench depth.

The invention relates to a preparation method of a spherical geopolymer with a high aperture ratio and a hierarchical pore structure. The invention belongs to the field of geopolymer preparation. The invention aims to solve the technical problems that an existing spherical geopolymer is low in porosity, the average particle size of microspheres is small, and the geopolymer with high aperture ratio is difficult to prepare. The method comprises the steps: step 1, preparing slurry; step 2, curing and balling; and step 3, post-processing. According to the novel method provided by the invention, the spherical geopolymer with the characteristic of a high-porosity communicated hierarchical pore structure can be prepared by designing a suspending agent and adjusting the foaming slurry, the diameter of the prepared spherical geopolymer is 2-3 mm, and the preparation efficiency is greatly improved; and technical support is provided for large-scale utilization of the porous spherical geopolymer, and in addition, the multi-layer suspending agent structure can effectively prevent the prepared spherical geopolymer from being bonded with the bottom of a beaker.

The invention relates to a preparation method of a flexible sensor. The preparation method comprises the steps of sequentially generating a sacrificial layer and a substrate layer on a base; sputtering a metal layer on the substrate layer; performing first photo-etching and etching processing on the metal layer to form a strain sensor device; coating a photosensitive layer on the strain sensor device and the substrate layer; performing second photo-etching and etching processing on the photosensitive layer to form an optical waveguide; integrating a light source and a photoelectric detector ata position, corresponding to the optical waveguide, on the substrate layer so that the light source, the photoelectric detector and the optical waveguide form the optical sensor device; packaging thesubstrate layer, the strain sensor device and the optical sensor device by use of a packaging layer so that the substrate layer, the strain sensor device, the optical sensor device and the packaginglayer form the flexible sensor; and dissolving the sacrificial layer so that the flexible sensor and the base are separated. According to the reparation method of the flexible sensor, the strain sensor device and the optical sensor device with complicated double-layer structures are molded once through large-range photo-etching, and the preparation efficiency of the flexible sensor is improved.

The invention discloses a nanometer manganous manganic oxide/active carbon composite material and a preparation method therefor. The composite material comprises the following raw materials in percentage by mass: 85-95wt% of manganous manganic oxide and 5-15wt% of coconut shell active carbon. According to the preparation method, the natural coconut shell active carbon is subjected to KOH activation processing in advance initially; the nanometer Mn<3>O<4>/AC composite material with a hierarchical-porous structure is prepared by adopting a simple and convenient hydrothermal method and a subsequent thermal treatment process; the method is simple; the preparation efficiency is high; the active carbon with excellent electric conductivity is combined with the manganous manganic oxide, so that the electric conductivity of the single manganous manganic oxide is greatly improved; and therefore, the electrochemical property of the composite material is greatly improved.

The invention relates to a preparation method of carboxylated cellulose nanoparticles. The preparation method comprises the following steps of soaking a cellulose raw material in a reaction liquid; carrying out hydrothermal reaction for 0.5-6 hours at the temperature of 80-120 DEG C; diluting a reaction product with water; carrying out suction filtration and washing repeatedly until washing liquor is neutral; and carrying out freeze drying to obtain the carboxylated cellulose nanoparticles, wherein the reaction liquid is mixed liquid of an oxidizing substance aqueous solution and a hydrochloric acid aqueous solution, and oxidizing substances are at least one of oxidizing acid and oxidizing salt. The method is simple and convenient in technology, easy to operate, low in cost and short in treatment time; the product is not required to be subjected to troublesome aftertreatment such as dialysis, and the prepared cellulose nanoparticles are high in purity, narrow in size distribution and easy to regulate and control; and the carboxylated cellulose nanoparticles are suitable for industrial large-scale production, and have wide application prospect in the fields of green nano composite materials, biological medicines, food, garments, cosmetics, coating, photoelectricity and the like.

The embodiment of the invention discloses an array substrate, a display panel and a display device, wherein the array substrate comprises a substrate base plate; a scanning wire and a data wire, which are formed on the substrate base plate, wherein the scanning wire and the data wire are crossed to define a plurality of pixel units, and the pixel units are provided with pixel electrodes electrically connected with the data wire; a plurality of touch electrodes, a plurality of touch walking wires and a span structure; the touch walking wires are electrically connected with one corresponding touch electrode through the span structure; along the extending direction of the scanning wire, the distance between adjacent two first pixel electrodes is more than the distance between the adjacent first pixel electrode and the second pixel electrode, and more than or equal to the distance between two second pixel electrodes. In conclusion, the distance between the pixel electrode and the span structure is big, the technique requirement is simple, and the production cost can be reduced.

The invention discloses a 3D printing and electrolytic polishing combined machining system for a CoCrMo dental crown. The combined machining system comprises laser selective melting printing equipment and electrolytic polishing equipment, wherein the laser selective melting printing equipment comprises an optical transmission system and a vacuum chamber which can be incident by laser of the optical transmission system, a moulding platform which can be lifted is arranged in the vacuum chamber, a powder feeding device used for conveying printing powder is also arranged in the vacuum chamber, the powder feeding device is connected with a power laying device which can lay the printing powder on the powder feeding device onto the moulding platform; the electrolytic polishing equipment comprises an electrolytic tank which is used for placing a product and filled with electrolyte, a para-position electrode is fixed in the electrolytic tank, the para-position electrode is connected with the cathode of a power supply, and when electrolytic polishing is carried out on the product, the product is connected with the anode of the power supply. The combined machining system disclosed by the invention has the advantages that the laser selective melting printing equipment and the electrolytic polishing equipment are combined, surface roughness of the treated product meets post processing requirement, tissues are compact and controllable, mechanical properties can be configured, and anticorrosion and wear-resistant properties are excellent.