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290results about How to "The process steps are simple" patented technology

Dual-waveband photoelectric detector and preparation method thereof

The invention provides a dual-waveband photoelectric detector and a preparation method thereof. The dual-waveband photoelectric detector comprises a semiconductor substrate, an infrared wavelength detecting part which is positioned on the semiconductor substrate and provided with an active area for ion injection, an ultraviolet wavelength detecting part which is positioned on the infrared wavelength detecting part, and an electrode leading-out pole for the infrared wavelength detecting part and the ultraviolet wavelength detecting part. The ultraviolet wavelength detecting part comprises a graphene layer which is positioned on the active area of the infrared wavelength detecting part, an ultraviolet sensitive quantum dot layer which covers the graphene layer. According to the dual-waveband photoelectric detector disclosed by the invention, infrared and ultraviolet dual-waveband detection can be performed, and the infrared wavelength detecting part and the ultraviolet wavelength detecting part are integrated, so that the process steps are simplified, and the cost is reduced; moreover, the graphene and the ultraviolet sensitive quantum dots are utilized as the ultraviolet wavelength photosensitive materials, and the forbidden band of the quantum dot can be regulated according to the dimension of the quantum dot and is quick in response speed, so that the ultraviolet waveband detection is adjustable and relatively sensitive.
Owner:SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT

Preparation method of Cu-Nb multi-core composite wire with rectangular cross-section

InactiveCN101872660AThe process steps are simpleShort processSuperconductors/hyperconductorsManufacturing extensible conductors/cablesL&D processExtrusion
The invention discloses a preparation method of a Cu-Nb multi-core composite wire with the rectangular cross-section, which comprises the following steps: firstly, carrying out first extrusion assembly and drawing for a single pure Nb rod and a first outer oxygen-free copper sheathing; secondly, carrying out second extrusion assembly and obtaining a first Cu-Nb multi-core composite filament; secondly, according to the extrusion assembly method and related process parameters in the step 2, repeatedly carrying out third extrusion assembly; thirdly, according to the extrusion assembly method and related process parameters in the step 2, repeatedly carrying out fourth extrusion assembly; and finally, setting and drawing by a rectangular mold. The invention has simple process step, short process, high production efficiency, low preparation cost and good use effect, and the produced Cu-Nb multi-core composite wire has superior performance; and the invention is suitable for mass production, can better control the dimensional accuracy of the rectangular cross-section, and can machine any size and length of hundred-million-magnitude-order Cu-Nb multi-core composite wires with the rectangular cross-section.
Owner:NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH

Ingot casting method of granular polysilicon

The invention discloses an ingot casting method of granular polysilicon. The method comprises the following steps: firstly, charging: putting the granular polysilicon into a crucible as silicon ingot casting materials; secondly, preheating; thirdly, melting, wherein the melting process comprises the following steps: step 1, carrying out heat preservation; steps 2 to 5, heating and implementing pressurization; step 6, raising temperature for the first time and keeping pressure, namely raising the temperature to T3 which is equal to 1450 DEG C; step 7, raising the temperature for the second time and keeping the pressure, namely raising the temperature to T4 which is equal to 1500 DEG C; step 8, raising the temperature for the third time and keeping the pressure, namely raising the temperature to T5 which is equal to 1550 DEG C, wherein temperature rise times from the step 6 to step 8 are all 260 to 300 minutes; step 9, carrying out heat preservation; step 10, continuously carrying out the heat preservation; fourthly, growing crystals; fifthly, annealing and cooling. The method disclosed by the invention is simple in steps, reasonable in design, convenient in realization, easily mastered, and good in use effect. Furthermore, ingot casting products with high conversion efficiency can be manufactured by using the low- cost granular polysilicon, thereby achieving the purposes of reducing wastes and lowering cost.
Owner:XIAN HUAJING ELECTRONICS TECH

Preparation method of silver coated copper powder for electronic slurry

The invention provides a preparation method of silver coated copper powder for electronic slurry, which comprises the following operation steps of: (1) adding a certain mass of copper powder raw materials into a reaction container, adding acid solution, carrying out ultrasonic stirring for 5 to 15 min, filtering materials, and collecting filter residue; (2) weighing a proper amount of complexing agents, adding the complexing agents into deionized water, then, adding copper powder after acid washing, carrying out stirring dispersion, and obtaining reducing liquid; (3) weighing a proper amount of silver nitrate, adding the silver nitrate into the deionized water, adding ammonia water, stirring the solution until the solution is transparent, and obtaining silver-ammonia solution; (4) adding the silver-ammonia solution into the reducing liquid for taking reaction under the dispersion stirring of an ultrasonic dispersing device; and (5) filtering the solution after the reaction, washing the filter residue by the deionized water and/or absolute ethyl alcohol, carrying out vacuum drying, and obtaining the product of the silver coated copper powder for the electronic slurry. The preparation method has the advantages that the raw material ingredients are simple, the technical steps are simple, the preparation method can be used for large-scale production, and in addition, a silver layer can not be deposited on the surface of the reaction container.
Owner:NINGBO GUANGBO NEW NANOMATERIALS STOCK

Method for dispersing complex conducting agent in electrode slurry for lithium ion capacitor

The invention discloses a method for dispersing a complex conducting agent in an electrode slurry for a lithium ion capacitor. The method comprises the following steps: (1) material weighing: weighing 0.5-14.5% of graphene, 5.5-14.5% of a carbon nano tube and the balance of conducting carbon black, weighing N-methylpyrrolidone which is 4-9 times of the mass of the complex conducting agent, and weighing a surfactant which accounts for 5-15% of the mass of the complex conducting agent, wherein the grapheme, the carbon nano tube and the conducting carbon black constitute the complex conducting agent, and all the materials are weighed for standby application; (2) step-by-step material adding for dispersion: mixing the complex conducting agent with N-methyl-pyrrolidone and the surfactant for ultrasonic dispersion firstly, adding the carbon nano tube for first high-speed dispersion secondly, and adding the grapheme for second high-speed dispersion finally. The method is simple in process sequence, high in operability, and suitable for industrialized production, and has the advantages that the complex conducting agent can uniformly disperse to form a three-dimensional conducting network structure, and the power performance can be obviously improved when the relatively high energy density of capacitance is retained.
Owner:NINGBO CRRC NEW ENERGY TECH CO LTD

C-direction sapphire polishing solution and preparation method thereof

InactiveCN105462504AThe process steps are simpleProcess parameters are easy to controlPolishing compositions with abrasivesIonSolution system
The invention firstly aims at providing a C-direction sapphire polishing solution. The C-direction sapphire polishing solution comprises silica sol, an auxiliary polishing agent, a complexing agent, oxidant, surfactant, humectant, a pH adjusting agent and water. The C-direction sapphire polishing solution has the advantages that the wafer surface is oxidized into a soft oxidation layer through the oxidant; the soft oxidation layer formed on the wafer surface is removed through the silica sol, and polishing efficiency is improved; roughness of the wafer surface is lowered through the auxiliary polishing agent; contamination of impurity irons is reduced through the complexing agent; the surfactant facilitates cleaning and removal; crystallization generated in the polishing process is greatly reduced through the humectant; the PH value of a polishing solution system and chemical action in the polishing process are adjusted through the pH adjusting agent. The invention secondly aims at providing a preparation method of the C-direction sapphire polishing solution. The C-direction sapphire polishing solution and the preparation method thereof have the advantages that the process steps are simple, the process parameters are easy to control, and the C-direction sapphire polishing solution and the preparation method thereof are suitable for mass production.
Owner:LENS TECH CHANGSHA

Method for extracting and separating components of osmanthus flower or arabian jasmine flower

The invention discloses a method for extracting and separating components of an osmanthus flower or an arabian jasmine flower. The method comprises the following steps: picking up fresh flowers, removing obvious impurities; storing and extracting by using edible 95% ethanol, filtering to obtain a fresh flower alcohol extract; concentrating the fresh flower alcohol extract by using a vacuum absorption method; absorbing high-volatility components which are extracted together with gaseous ethanol during concentration by adopting an adsorbent; recovering the gaseous ethanol by a cold well behind the adsorbent; forming fresh flower extractum by using vacuum concentrated components; extracting the adsorbent absorbing the high-volatility components of the fresh flowers by using a supercritical CO2 extraction technology, so as to obtain fragrance volatile essential oil of the fresh flowers; separating the fresh flower extractum by using a molecular distillation technology, so as to obtain medium volatile absolute oil and high-volatility balm of the fresh flowers. By adopting the method, the components of the osmanthus flower or the arabian jasmine flower can be obtained, so that the method is simple in technological steps and environment-friendly, the problem that easy-to-loss fragrance volatiles when the solvent is recovered is overcome by using a vacuum absorption method in a concentrating manner, a residual solvent is avoided by using the supercritical CO2 extraction technology and the molecular distillation technology, and the raw materials are high in utilization rate.
Owner:仙芝科技(福建)股份有限公司 +1

Flax rove treatment process

The invention relates to a process for treating flax rough yarn. The prior sub-oxygen bleaching chemical degumming processes have complex flow, large water usage, large energy consumption, highly toxic substances in the chloride bleaching waste water and high pollution to environment. The process comprises the following reaction steps: step one, boiling-off and oxygen-bleaching, namely adding sodium hudroxide, hydrogen peroxide, sodium silicate, calcined soda, osmotic agent, carbonyl diamide, sodium tripolyphosphate and sodium sulfite into water, and heating and boiling off the mixture; step two, washing by water, namely washing the mixture once or twice by hot water and twice or thrice by cold water, and washing the mixture by overflow; step three, washing by acid, namely using acetic acid and adding the osmotic agent into the acetic acid; step four, washing by water, namely washing the mixture twice or thrice by cold water, and washing the mixture by overflow; and step five, soft treatment, namely adding alkyl silicon composite RS into the water. The process adopts the method of combining carbomite and the hydrogen peroxide to replace sodium chlorite which is a toxic bleaching agent, is favorable for environmental protection, improves whiteness of yarns at the same time, and reduce production cost.
Owner:HANGZHOUSNGLU SILK

Preparation method of electrolyte for vanadium redox battery (VRB)

InactiveCN102110837AThe process steps are simpleRegenerative fuel cellsVanadium pentoxide dustSulphate Ion
The invention relates to a preparation method of an electrolyte for a vanadium redox battery (VRB), wherein the electrolyte for the VRB is prepared by means of an electrolytic process, the electrolyte for the VRB prepared by means of an electrolytic process is a quadrivalent vanadium ion solution, and the preparation method comprises the following basic steps: 1) preparing a mixed solution composed of sulfuric acid and vanadium sulphate, adding vanadium pentoxide powder into a 98% sulfuric acid solution, then heating and stirring, and then diluting with distilled water to prepare a mixed solution comprising sulfuric acid and vanadium sulphate; 2) filtering the mixed solution comprising sulfuric acid and vanadium sulphate to remove a small quantity of insoluble vanadium pentoxide to obtain a mixed solution comprising sulfuric acid and vanadium sulphate, wherein the mixed solution can meet the requirements for the preparation of the quadrivalent vanadium ion solution; and 3) pouring the mixed solution comprising sulfuric acid and vanadium sulphate into an electrolytic cell without a diaphragm to electrolyze to obtain a quadrivalent vanadium ion solution. The preparation method provided by the invention has the advantages that the preparation cost is reduced and the process is simple.
Owner:WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +1

Preparation method of thermosetting type composite adhesive

The invention provides a preparation method of a thermosetting type composite adhesive, which comprises the steps of preparing polyester polyol and preparing thermosetting composite adhesive, wherein the polyester polyol is prepared through primary esterification, secondary esterification and condensation polymerization; dimethyl terephthalate (DMT) and diglycol are added to a polyester synthesis kettle to carry out the primary esterification; dimeric dibasic acid, m-phthalic acid, nonane diacid and 1,3-butanediol are added to the polyester synthesis kettle in which the primary esterification reaction is finished to carry out the secondary esterification; low vacuumizing, high vacuumizing and long vacuumizing are sequentially carried out for the polyester synthesis kettle in which the secondary esterification is finished, and the polycondensate generated after the condensation polymerization is the polyester polyol; the thermosetting composite adhesive is prepared by mixing evenly the prepared polyester polyol, enclosed type isocyanate tripolymer, a component solvent, titanic acid ester chelon, tackifying resin and plasticizer. The thermosetting type composite adhesive prepared by the method has excellent bonding intensity when used for bonding PVC and an armor plate without chemical treatment for the surface.
Owner:BEIJING COMENS NEW MATERIALS

Method for preparing amoxicillin or ampicillin in full-water-phase through mode

The invention discloses a method for preparing amoxicillin or ampicillin in a full-water-phase through mode. The method includes the steps that a high-concentration penicillin GK or penicillin VK extracting solution is used as a raw material, immobilized penicillin G acylase or penicillin V acylase is used as an enzyme catalyst, a high-concentration 6-APA solution or crystal is obtained through full-water-phase operations such as catalytic cracking, separating, acidization, filtering, chromatography and concentration by nanofiltration, and then the amoxicillin or the ampicillin is synthesized by the solution or crystal and HPGME or phenylglycine methyl ester under the catalytic action of the immobilized penicillin synthetase. According to the method, water-phase reacting is conducted in the whole process, no organic solvent is used, and environmental pollution is reduced; besides, the special immobilized penicillin G acylase and the penicillin V acylase are used for cracking the high-concentration penicillin GK or VK extracting solution, and special macroporous absorption resin is used for separating and cracking products, so that the processing steps are greatly simplified, the production cost is lowered, the product yield is increased, and the industrial production requirement is met.
Owner:HUNAN FLAG BIOTECHNOLOGY CO LTD

Preparation method for metal organic framework structure wrapped ammonium polyphosphate fire retardant and application

The invention discloses a preparation method for a metal organic framework structure wrapped ammonium polyphosphate fire retardant and application. The preparation method comprises the following steps: dispersing ammonium polyphosphate in a methanol solution, adding the methanol solution containing dimethylimidazole in the mixed solution, uniformly stirring and mixing, dropwise adding the methanolsolution containing metal nitrate, uniformly stirring, performing a heating reflux reaction, centrifuging, washing and drying after completing the reaction, thereby obtaining the fire retardant. Thepreparation method has the advantages of simple processing step, high operability and low preparation cost; the active site of ammonium polyphosphate is sealed by adopting a metal organic framework structure to form an organic isolation layer with certain thickness to block the invasion of water, so that the polarity and the hydrophily of the material can be effectively reduced, the compatibilityand the dispersibility of the material and an organic high-molecular polymer are improved, and meanwhile, the catalytic charing effect is achieved, and the flame retardant efficiency of ammonium polyphosphate is improved; and the preparation method can be widely applied to fields of flame retardant materials such as epoxy resin, polyurethane, polystyrene, polylactic acid or polyolefin.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

Manufacturing method for carbon fiber composite plate and self-punching riveting die and method for carbon fiber composite plate and aluminum alloy plate

The invention discloses a self-punching riveting die for a carbon fiber composite plate and an aluminum alloy plate. The self-punching riveting die comprises a rivet which is used for riveting the carbon fiber composite plate and the aluminum alloy plate, a punch which can reciprocate vertically in a through hole of a blank holder, and a female die body. Female die cavities in the center position of the female die body are concentrically formed with the punch. The side walls of the female die cavities are unthreaded hole cylindrical side walls, and cone bosses are arranged in the centers of the female die cavities. Unthreaded holes and the conical bosses are riveted and matched. The punch and the female die body are connected with a sensor, and height adjusting coefficients, speed adjusting coefficients and timing adjusting coefficients of the punch are obtained by collecting data. The invention further discloses a preparing method for the carbon fiber composite plate and a self-punching riveting method for the carbon fiber composite plate and the aluminum alloy plate. The self-punching riveting die and method for the carbon fiber composite plate and the aluminum alloy plate have the characteristics that large impact force can be borne, technology steps are simple, cost is low, and tensile, shearing resistance and fatigue resisting performance of a riveting connector are superior.
Owner:JILIN UNIV
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