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52results about How to "Unique microstructure" patented technology
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High-strength high-plasticity copper-containing high-carbon TWIP steel and preparation process thereof
The invention relates to high-strength high-plasticity copper-containing high-carbon TWIP steel and a preparation process thereof. In the preparation process, the carbon content is improved on the basis of Fe-Mn-C series TWIP steel, a non-carbide forming element Cu and rare earth Ce serving as alloying elements are added into the steel, and a solution treatment process at the high temperature of between 900 and 1,050 DEG C and a hot rolling process are combined, so that gap defects in an ingot structure are reduced and the intrinsic strength and plasticity of the high-carbon copper-containing TWIP steel are fully exerted. The prepared alloy steel has the outstanding characteristic that product of strength and plasticity for reflecting the comprehensive mechanical property of the alloy steel is obviously improved; the yield strength of the alloy steel is 513.7MPa, the tensile strength is 1,223.7MPa, the elongation is 86.8 percent, and the product of strength and plasticity reaches 106,217.2MPa. percent which is 20 percent higher than highest data 87,882MPa. percent of multiple kinds of TWIP steel reported by domestic and foreign documents at present; and novel high-strength high-toughness steel is prepared for the mechanical manufacturing industry and equipment industry.
Owner:FUZHOU UNIV
Preparation method of agricultural drought-resistant type water retaining agent with good salt tolerance and low water absorbency
InactiveCN103554358AStrong salt toleranceAppropriate water absorption capacityOrganic fertilisersSoil conditioning compositionsSilicon dioxideChemistry
The invention discloses a technology for preparing an agricultural drought-resistant water retaining agent, which belongs to the field of one of the agricultural drought-resistant water retaining technologies. The technology is mainly characterized by comprising the following steps of: initiating the polymerization of acrylic acid and acrylamide monomers by using a nanometer silicon dioxide-ammonium persulfate compound system under a low-pressure heating condition. The water retaining agent prepared by using the technology is quite strong in salt resistance (70-120 times in absorbing normal saline), and proper in water absorbency (300-500 times), can resist drought and retain water in soil, simultaneously does not compete for water with plants, does not harden, and therefore can be widely applied to the fields of agriculture and desertification control for drought resistance and water retaining.
Owner:东北大学秦皇岛分校
Method for preparation of novel pipe type ceramic capacitor
InactiveCN1629990AUnique microstructureIncrease capacityFixed capacitor dielectricCapacitor manufactureDielectricSurface layer
This invention provides a method for preparing pipe type ceramic capacitor containing the method for preparing surface layer-pipe type ceramic capacitor and grain boundary later pipe type ceramic capacitor through preparing semiconductor ceramic material with high effective dielectric constant to substitute I group or II group medium ceramic material for preparing large capacity pipe type ceramic capacitor. The effective dielectric constant of said semiconductor ceramic can reach to ten of thousands even hundred of thousands.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Ecological bait for mixed culture of Exopalamon carincauda Holthuis and Portunus trituberculatus and preparation method thereof
InactiveCN101411409ADelicious meatLess investmentFood processingClimate change adaptationAdditive ingredientForsythia
The invention relates to ecological feedstuff for the mixed culture of palaemon carincauda and portunus trituberculatus. The ecological feedstuff is characterized in that the ecological feedstuff is prepared by the following raw materials according to the weight percentage: 95 to 99 percent of basic nutrient content, and 1 to 5 percent of medicine content. The basic nutrient content comprises full cream fish meal, common Japanese mackerel powder, mussel cream, cuttle fish cream, shrimp head powder, canola meal, puffed corn, puffed soybean, peanut pulp, linter pulp, wheat middlings, and the like. The medicine content comprises vine of tuber fleece flower, linley eupatoium, forsythia fruit, rhubarb, asafetida, astragalus, albizia bark, liquorice, Indian bread with hostwood, choline chloride, active attapulgite clay, and the like. The invention also discloses a preparation method for the ecological feedstuff for the mixed culture of palaemon carincauda and portunus trituberculatus. The preparation method has balanced nutrient content, and is capable of meeting all the nutrient physiological requirements under the condition of the artificial mixed culture of palaemon carincauda and portunus trituberculatus, effectively reducing the mutual killing rate of palaemon carincauda and portunus trituberculatus, and improving the growth rate of palaemon carincauda and portunus trituberculatus.
Owner:HUAIHAI INST OF TECH
Novel metallic film preparation technology on liquid phase substrate surface
InactiveCN1730716AEasy to operateUnique microstructureVacuum evaporation coatingSputtering coatingGrain structureVacuum evaporation
Disclosed is a novel metallic film preparation technology on liquid phase substrate surface, which comprises using liquid phase material whose saturated vapor tension is lower than the vacuum evaporation pressure as substrate, employing magnetron sputtering or thermal deposition method, evaporating the metal atoms with energy of argon ions in high speed movement or tungsten filament heated by electric current, then depositing the evaporated metal atoms onto liquid phase substrate surface, finally growing metallic film having polycrystalline grain structure through diffusion, core formation, rotation and agglomeration. The film has substantially no internal stress.
Owner:ZHEJIANG UNIV
Method for preparing high-intensity and high-plasticity iron steel material with high manganese and aluminum contents
InactiveCN101445864AImprove plasticityHigh strengthTemperature control deviceMetal rolling arrangementsExtensibilityManganese
A method for preparing a high-intensity and high-plasticity iron steel material with high manganese and aluminum contents belongs to the processing field of iron steel materials. A high-intensity and high-plasticity iron steel material with high manganese and aluminum contents includes the following components: C%: 0.6-1.2wt%, Mn%: 18-33wt%, Al%: 8-13wt%, S% less than 0.008%, P% less than 0.02%, Fe or inevitable impurities in balancing amount. The preparation methods comprises steps as follows: a material plate blank after the smelting preparation is prepared in the processes of heat rolling and cold rolling, the thickness of a cold-rolled plate is 0.8-1.5 mm, and the cold-rolled steel plate keeps the temperature of 700-1300 DEG C for 10-20 minutes in a heating furnace and cools at the speed of 10-50 DEG C / s to the room temperature. The invention can achieve different levels of intensity and plasticity proportions through process control, and the performance includes shear strength being 540-1240 MPa, tensile strength being 780-1310 MPa and extensibility being 10.0-76.0%. The high-intensity and high-plasticity iron steel material with high manganese and aluminum contents prepared by the invention plays a significant role and has great application space for the booming automobile industry and the military industry.
Owner:UNIV OF SCI & TECH BEIJING
Preparation method of bamboo fiber paper cups
InactiveCN108824071AGood oil resistanceGood resistance to organic solventsPaper coatingReinforcing agents additionPolypropyleneGuar gum
The invention discloses a preparation method of bamboo fiber paper cups. The invention relates to a bamboo fiber paper cup and a production process thereof. The bamboo fiber paper cup mainly structurally comprises a hollow fiber cup body, and is characterized in that the cup body comprises an outer layer, an inner layer, a hollow layer arranged between the outer layer and the inner layer and a coating layer above the inner layer. The outer layer and the inner layer are prepared from the following components in parts by weight: bleached bamboo fibers, dahurian larch fibers, modified starch, chitosan, talc powder, a dispersant, guar gum, glyceride hydrolase and a wet-strength agent. The hollow layer is prepared from the following components in parts by weight: polypropylene hollow short fiber pulp, dahurian larch fibers, chitosan, talc powder and a dispersant. According to the above settings, the outer layer and the inner layer are produced by employing bamboo fibers. The bamboo fiber pulp not only is environment-friendly, but also has the characteristics of being excellent in antibacterial property, bacteriostatic and free of peculiar smells. The hollow fiber layer has the functionsof being light in weight, heat insulative and warm-keeping. The bamboo fiber paper cup serving as a hot drink paper cup and a cold drink paper cup simultaneously is relatively safe.
Owner:安徽永豪新材料科技有限公司
Nano twin-crystal nickel with extremely small twin-crystal lamella thickness and ultrahigh strength and preparation thereof
The invention relates to a superhard nanocrystal metal material, in particular to nano twin-crystal nickel with extremely small twin-crystal lamella thickness and ultrahigh strength and a preparationmethod thereof. The nano twin-crystal nickel with a thickness of hundreds of microns to millimeters is prepared by utilizing an electrolytic deposition technology, wherein a microstructure of the nanotwin-crystal nickel is composed of columnar crystal particles with lengths of 200-3000 nm and widths of about 10-50 nm, twin-crystal lamella structures with high density and consistent orientation are contained in columnar crystals, a thickness of each twin-crystal lamella structure is 0.5-10 nm, the crystal particles with the twin-crystal structures can account for 100% of the crystal particlesof a whole sample, a room-temperature microhardness of a material can reach 8.5 GPa or above and is 1.5-2 times or above that of common electroplating nano nickel, and after annealing is carried out at 250 DEG C for half an hour, the hardness is increased to 9.6 GPa and a structure roughening temperature can reach 350 DEG C or above and is 150 DEG C or above higher than a structure roughening temperature of common nanocrystal nickel. A prepared nanocrystal coating can be applied to wear-resistant protection of metal materials such as copper, nickel, alloys of the copper and nickel, and stainless steel, and can also be applied to the fields of micromechanical systems (MEMS) and the like.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Co-modified metal organic framework-derived ZrO2/C electromagnetic wave absorbing material, and preparation method and application thereof
ActiveCN110437800AImproving Impedance MatchingUnique microstructureOther chemical processesFiberMetal-organic framework
The invention relates to a Co-modified metal organic framework-derived ZrO2 / C electromagnetic wave absorbing material, and a preparation method and an application thereof. The electromagnetic wave absorbing material is of a three-dimensional network structure formed by interweaving one-dimensional fibers. The fiber is composed of a carbonaceous matrix, ZrO2 and Co nanoparticles. The Co nanoparticles are embedded in the surface of the carbonaceous matrix uniformly distributed by ZrO2. The method comprises the steps that 1, a cobalt source, a zirconium source, an anhydrous acetic acid organic ligand and DMF are processed into a solvothermal solution, the organic ligand containing a carbon source, an MOF precursor is obtained after solvothermal reaction, the MOF precursor is washed and dried,then the MOF precursor is treated with the cobalt source, and cobalt source composite MOF is obtained; and (2) the compounded MOF precursor is placed in a protective atmosphere to convert cobalt ionsin a cobalt source into elemental cobalt, a zirconium source into ZrO2 and an organic ligand into a carbon matrix, thereby obtaining the catalyst. According to the preparation method disclosed by theinvention, ZrO2, Co and C are effectively subjected to nanoscale compounding, so that the prepared material has excellent performance.
Owner:SHANDONG UNIV
Fabric-based capacitive sensor and manufacturing method thereof
ActiveCN110160562ALow modulusImprove flexibilityConverting sensor output electrically/magneticallyCapacitive sensingEngineering
The invention discloses a fabric-based capacitive sensor. The fabric-based capacitive sensor comprises an electrode layer a and an electrode layer b, wherein a fabric dielectric layer is arranged between the electrode layer a and the electrode layer b, the electrode layer a, the electrode layer b and the fabric dielectric layer are all solidified and encapsulated through an encapsulating material,and the electrode layer a and the electrode layer b are both connected with leads. The invention also discloses a manufacturing method of the fabric-based capacitive sensor, which comprises the following steps: firstly, pretreating the fabric dielectric layer, then soaking the fabric dielectric layer in the dispersion liquid, and taking out after ultrasonic treatment; printing a mould through a 3D printer, adhering a conductive copper foil to the surface of the fabric dielectric layer, placing the fabric dielectric layer into the mould, and clamping the mould; and pouring the prepared encapsulating material into the mould, standing, and then placing the molud into a curing furnace for curing treatment to finally obtain the fabric-based capacitive sensor. The fabric-based capacitive sensorsolves the problems of poor flexibility and high manufacturing cost of the existing capacitive sensor.
Owner:XI'AN POLYTECHNIC UNIVERSITY
A <111> textured nano-twinned Cu bulk material and its preparation method
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
High-extensibility electrolytic copper foil and preparation method thereof
ActiveCN113621999AEasy to implementReduce manufacturing costFurnace typesElectroforming processesCopper foilCrystallite
The invention discloses a high-extensibility electrolytic copper foil and a preparation method thereof, and belongs to the technical field of preparation of electrolytic copper foils for copper-clad plates. The preparation method comprises the following steps: firstly, preparing a nano twin-crystal copper foil through a direct-current electrolytic deposition technology, and then annealing the nano twin crystal copper foil to obtain the high-extensibility electrolytic copper foil, wherein the thickness of the high-extensibility electrolytic copper foil is controllable and adjustable in a range of 3-100 microns. The electrolytic copper foil has one or more crystal grains along the thickness direction, and the size range of the crystal grains is 0.5-20 microns; and one or more twin-crystal lamellas exist in the crystal grains. When the thickness of the electrolytic copper foil is 12 microns, the elongation of the electrolytic copper foil is as high as 15%, the tensile strength is 191MPa, and the electrolytic copper foil has a relatively good application prospect in the field of flexible copper-clad plates.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
High-strength high-plasticity copper-containing high-carbon TWIP steel and preparation process thereof
The invention relates to high-strength high-plasticity copper-containing high-carbon TWIP steel and a preparation process thereof. In the preparation process, the carbon content is improved on the basis of Fe-Mn-C series TWIP steel, a non-carbide forming element Cu and rare earth Ce serving as alloying elements are added into the steel, and a solution treatment process at the high temperature of between 900 and 1,050 DEG C and a hot rolling process are combined, so that gap defects in an ingot structure are reduced and the intrinsic strength and plasticity of the high-carbon copper-containingTWIP steel are fully exerted. The prepared alloy steel has the outstanding characteristic that product of strength and plasticity for reflecting the comprehensive mechanical property of the alloy steel is obviously improved; the yield strength of the alloy steel is 513.7MPa, the tensile strength is 1,223.7MPa, the elongation is 86.8 percent, and the product of strength and plasticity reaches 106,217.2MPa. percent which is 20 percent higher than highest data 87,882MPa. percent of multiple kinds of TWIP steel reported by domestic and foreign documents at present; and novel high-strength high-toughness steel is prepared for the mechanical manufacturing industry and equipment industry.
Owner:FUZHOU UNIV
Pyroelectric unit infrared detector and production thereof
InactiveCN1746639AHigh pyroelectric coefficientHigh sensitivityThermoelectric device with dielectric constant thermal changePyrometry using electric radation detectorsSurface oxidationOxide
A unit pyroelectric infrared detector consists of top and bottom electrodes, BST ceramic semiconductor and BST ceramic oxide layer media wrapped outside of said semiconductor. It features that BST ceramic semiconductor is prepared by high temperature sintering and reduction heat treating ( Ba 0.7 Sr 0.3 ) TiO3 ceramic base material doped with 1 ¿C 5 wt % rare earth impurities with its thickness less than 0.20mn and resistance rate less than 10ª©.cm, BST ceramic oxide layer media is prepared by oxidizing surface of ceramic semiconductor with its thickness of 5 ¿C 10 micro m. The preparing method is also provided.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA
Method for preparing vanadium pentoxide-based nanosheets
ActiveCN109205674AEasy to prepareEasy to operateVanadium oxidesTin oxidesCooking & bakingN dimethylformamide
The invention discloses a method for preparing vanadium pentoxide-based nanosheets, and belongs to the field of functional nanomaterials. The method comprises the following preparation steps: firstly,dissolving vanadium triacetylacetonate and tin tetrachloride pentahydrate in N,N-dimethylformamide, and performing magnetic stirring for 1 to 2 hours until a uniform and transparent solution is formed; secondly, transferring the solution into a stainless steel autoclave lined with polytetrafluoroethylene, reacting in a baking oven, washing the solution with anhydrous ethanol after the reaction, and drying; finally, putting ground powder into a muffle furnace for calcining treatment to obtain V2O5-SnO2 nanosheets with high crystallinity. The method has the advantages of short production cycle,low cost, easiness in operation and mild reaction conditions; the material has higher performance, and has a broader application prospect in the fields such as energy storage and catalysis.
Owner:UNIV OF SCI & TECH BEIJING
Composite lithium battery cathode with high energy storage efficiency, preparation method thereof and lithium battery
ActiveCN108695509AIncrease energy densityIncrease capacityElectrode carriers/collectorsSecondary cellsComposite filmHigh energy
The invention discloses a composite lithium battery cathode with high energy storage efficiency, a preparation method thereof and a lithium battery. The lithium battery cathode comprises a a current collector and an active cathode slurry applied to the surface of the cathode current collector; the active cathode slurry is prepared from modified silicate composite material, a conductive agent and abinder; and the cathode current collector is a modified carbon nanotube / carbon nanofiber composite film. Compared with the prior art, the cathode current collector disclosed by the invention not onlyimproves the energy density of batteries, but also resists the corrosion of electrolyte and improves adhesion; because a silicate precursor which is prepared by in-situ carbonization composition andball-milling / spray-drying is adopted as the modified silicate composite material, the sintering and agglomeration between silicate particles can be prevented, and the transmission path of lithium ionscan be shortened; because the external surface of the silicate active material is wrapped by a fast ion conductor layer to form a mosaic structure, the material is prevented from being in direct contact with the electrolyte, the lithium ion diffusion capability is improved, and the interface resistance between the material and the electrolyte is decreased.
Owner:湖南庆胜新能源科技有限公司
Method for preparing porous germanium by utilizing electrodeposition of ionic liquid
ActiveCN104752704AUnique microstructureIncrease surface areaElectrochemical processing of electrodesElectrode thermal treatmentIonChemistry
The invention relates to a method for preparing porous germanium by utilizing electrodeposition of ionic liquid. The invention relates to the method for preparing the porous germanium. The invention aims the solve the problems that germanium-based materials prepared by the existing method are mostly granular, even if gaps exist among granules, the gaps are smaller and unordered, and cannot better buffer volume expansion of the germanium, or the gaps in block shapes cannot provide more buffer space, and meanwhile, the traditional preparation method is high in preparation cost, not environment-friendly, and tedious in process. The method comprises the following steps of (1) a hydrogen foam method; (2) cleaning treatment of electrodes; (3) cleaning treatment of electrolytic cells; (4) electrodeposition of the ionic liquid, so that the porous germanium prepared by utilizing electrodeposition of the ionic liquid is obtained. The invention is applied to a method for preparing the porous germanium by utilizing electrodeposition of the ionic liquid.
Owner:HARBIN INST OF TECH
MOF-derived composite wave-absorbing material as well as preparation method and application thereof
PendingCN113840528ALight in massLarge specific surface areaCarbon compoundsMagnetic/electric field screeningHigh volume manufacturingMetal alloy
The invention provides a preparation method of an MOF-derived composite wave-absorbing material. The preparation process is simple, the cost is low, large-scale mass production can be realized, and the prepared wave-absorbing material has good impedance matching, wide effective absorption bandwidth and high reflection loss value. The ordered porous wave-absorbing material is synthesized by taking MOFs as a template, and magnetic metal, alloy or metal oxide generated after calcination can bring excellent magnetic loss, which is beneficial to impedance matching and wider effective absorption bandwidth.
Owner:ZHEJIANG UNIV OF TECH
Cold catalyst-containing novel compound air purifying particle and preparation method thereof
InactiveCN109092053AExtend the life cycleUnique microstructureGas treatmentDispersed particle separationPorosityDecomposition
The invention discloses a cold catalyst-containing novel compound air purifying particle and a preparation method thereof, and belongs to the technical field of air purification. The cold catalyst-containing novel compound air purifying particle comprises Baina soil with a 2:1 layered chain-shaped crystal structure, and the Baina soil has a unique microstructure and electric charge properties, sothat most of harmful gases with polarity in air can be adsorbed, secondarily, sepiolite, medical stone and diatom are relatively large in porosity, so that a stable structure and long-lasting adsorbability are achieved by cooperation of the sepiolite, the medical stone and the diatom, and the air purifying particle is strong in adsorbability, and relatively strong in rheological property and catalytic performance, and meanwhile, a cold catalyst contained in the formula can catalyze formaldehyde to react with oxygen in air, and the cold catalyst itself does not participate in the reaction directly in the process of catalytic reaction, so that the decomposition effect of the air purifying particle on formaldehyde is effectively improved, a service cycle of the air purifying particle is prolonged, and formaldehyde is effectively decomposed for a long term.
Owner:山东名物健康科技有限公司
Process for preparing functional film on fused substrate surface
InactiveCN1807676AUnique microstructureMicrostructural stabilityVacuum evaporation coatingSputtering coatingSputteringEvaporation
The invention discloses a functional film preparing method of molten substrate surface, which is characterized by the following: adopting the material of solid-phase low-melting point and low vapor pressure at ambient temperature; elevating substrate temperature before depositing film; melting film for liquid phantom background; evaporating film material atom and depositing to liquid level substrate surface with the method of magnetron sputtering or heat evaporation; adopting the method of diffusing, formatting the core, rolling, aggregating to grow functional film of characteristic grain arrangement; reducing substrate temperature to room temperature after finishing aggradation; curing background; keeping microconfiguration of film stable. The method simplifies technique, which reduces the cost.
Owner:ZHEJIANG UNIV
A kind of high temperature resistant elastic graphene airgel and preparation method thereof
ActiveCN111974320BUnique microstructureReduce oxidationAerogel preparationColloidal chemistry detailsFreeze-dryingActive agent
The invention relates to a high temperature resistant elastic graphene aerogel and a preparation method thereof. The method comprises the following steps: (1) stirring and mixing a graphene oxide solution, a reducing agent, a surfactant and a silica sol evenly to obtain a precursor foam; (2) subjecting the precursor foam to a hydrothermal reduction reaction to obtain a graphene wet gel with silica sol suspended in the pores; (3) performing the steps of directional freezing and freeze-drying on the graphene wet gel to obtain pores The graphene aerogel that is loaded with silica nanoparticles on the wall; (4) the graphene aerogel is thermally annealed at a high temperature under an inert atmosphere to obtain a high temperature resistant elasticity that is covered with a thin layer of silica nanoparticles on the pore wall Graphene aerogel. The invention prepares graphene aerogel with high temperature resistance and high elasticity, greatly improves the temperature resistance of graphene aerogel materials in an aerobic environment from not more than 600 DEG C commonly reported to 800 DEG C, and broadens its application in High temperature and high elasticity applications.
Owner:AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
Cu2O-TiO2 composite photocatalyst as well as preparation method and application thereof
ActiveCN113181912AMultiple activitiesMany active sitesWater/sewage treatment by irradiationWater treatment compoundsUltraviolet lightsActive site
The invention discloses a Cu2O-TiO2 composite photocatalyst as well as a preparation method and application thereof. The composite photocatalyst is composed of Cu2O nanospheres and TiO2 nanosheets according to the mass ratio of 1: 2.8, and Cu2O is the nanospheres of a hollow structure and is evenly loaded on the TiO2 nanosheets. The Cu2O of the hollow structure has the advantages of more active sites, high light absorption capability, facilitation of reaction molecule diffusion and the like; the TiO2 nanosheets have the advantages of high oxidation capacity, large specific surface and the like. The advantages of the Cu2O and the TiO2 nanosheets are synergistically enhanced, so that the photocatalytic performance of the Cu2O-TiO2 composite photocatalyst is greatly improved. Compared with performance of the TiO2, the activity of the catalyst is improved by 1.64 times. The Cu2O-TiO2 composite photocatalyst can well degrade a methyl orange (MO) wastewater solution under ultraviolet light; and the Cu2O-TiO2 composite photocatalyst is simple in preparation method, low in cost, good in reproducibility and unique in structure, so that the Cu2O-TiO2 composite photocatalyst has a good application prospect.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Preparation method of magnesium-nitrogen co-doped biomass activated carbon with high specific surface area
ActiveCN109502585AUnique three-dimensional connected hole structureRealize comprehensive utilizationCarbon compoundsNitrogen gasChemistry
The invention discloses a preparation method and application of magnesium-nitrogen co-doped biomass activated carbon material with high specific surface area. The activated carbon has a unique macropore-mesopore-micropore three-dimensional composite hole structure, and has a characteristic of magnesium-nitrogen co-doping. The method comprises the following steps: taking hemp cores which are biomass wastes as raw material; after cleaning, drying and carrying out shearing pretreatment, dipping the raw materials in a mixed solution of zinc chloride and magnesium chloride for a period of time, drying and then loading in a tube furnace, and carbonizing, activating and cooling in a nitrogen atmosphere; and after pickling and washing the obtained matter, dipping the obtained matter in an ethanolsolution of aminopyridine for a period of time and then drying to obtain the magnesium-nitrogen co-doped activated carbon. The specific surface area of the activated carbon is high, and the activatedcarbon has excellent carbon dioxide gas adsorption performance.
Owner:GUIZHOU INST OF TECH
Nano twin crystal copper material with ultrahigh strength and superhigh conductivity as well as preparation method
InactiveCN1234914CImprove propertiesUnique microstructurePhotography auxillary processesProcess efficiency improvementElectrical resistance and conductanceElectrolysis
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Copper-aluminum-silicon alloy nanometer negative electrode material of lithium battery and preparation method of negative electrode material
InactiveCN107732196AUnique microstructureReasonable particle size distributionMaterial nanotechnologyCell electrodesDislocationNickel–lithium battery
The invention discloses a copper-aluminum-silicon alloy nanometer negative electrode material of a lithium battery and a preparation method of the negative electrode material, and belongs to the technical field of the negative electrode material of the lithium battery. According to the copper-aluminum-silicon alloy nanometer negative electrode material of the lithium battery and the preparation method of the negative electrode material provided by the invention, a technical scheme is adopted as follows: the copper-aluminum-silicon alloy nanometer negative electrode material of the lithium battery comprises the following raw materials in parts by weight: 27.5-32 parts of silicon, 58-63 parts of copper, 9-11 parts of aluminum and 0-5 parts of impurities; and the overall alloy nanomaterial comprises a multi-defect organization structure of air pores, shrinkage holes, shrinkage porosity, dislocation, vacancy and holes, and the grain diameter is less than or equal to 80[mu]m. The inventioncan be applied to the technical field of the negative electrode material of the lithium battery.
Owner:산시우테하이머뉴매테리얼스테크놀러지컴퍼니리미티드
Adsorbent capable of removing heavy metals in industrial wastewater and preparation method thereof
ActiveCN111790352ARealize reasonable reuseLow costOther chemical processesWater contaminantsCarbon compositesIndustrial waste water
The invention belongs to the technical field of industrial wastewater treatment adsorbents, and particularly relates to an adsorbent capable of removing heavy metals in industrial wastewater and a preparation method of the adsorbent. The preparation method of the adsorbent comprises the following steps: mixing and stirring 10-20wt% of sodium hydroxide and 80-90wt% of water glass until sodium hydroxide particles are completely dissolved to obtain an alkali activator; mixing 55-65 wt% of sawdust powder, 20-30 wt% of steel slag powder and 10-20 wt% of the alkali activator, and grinding for 0.5-1h to obtain mixed powder; subjecting the mixed powder to mechanical pressing and forming under a pressure of 100-150 MPa to obtain a steel slag sawdust geopolymer precursor; drying the geopolymer precursor at 50-80 DEG C, then carrying out heat preservation for 1-2.5 hours at 600-850 DEG C under the protection of nitrogen to obtain a steel slag sawdust carbon composite material; and washing the steel slag sawdust carbon composite material with deionized water until the pH value of the washing water is 5-7 to obtain the adsorbent. The preparation method disclosed by the invention has the advantages of low cost, simple process, easiness in industrial production and the like, and the prepared easily recycled adsorbent for removing the heavy metals in the industrial wastewater has a good adsorption effect on the heavy metals and is easy to recycle.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
a co/zro 2 /c Electromagnetic wave absorbing material and its preparation method and application
ActiveCN110437800BImproving Impedance MatchingUnique microstructureOther chemical processesFiberAcetic acid
The invention relates to a Co-modified metal organic framework-derived ZrO2 / C electromagnetic wave absorbing material, and a preparation method and an application thereof. The electromagnetic wave absorbing material is of a three-dimensional network structure formed by interweaving one-dimensional fibers. The fiber is composed of a carbonaceous matrix, ZrO2 and Co nanoparticles. The Co nanoparticles are embedded in the surface of the carbonaceous matrix uniformly distributed by ZrO2. The method comprises the steps that 1, a cobalt source, a zirconium source, an anhydrous acetic acid organic ligand and DMF are processed into a solvothermal solution, the organic ligand containing a carbon source, an MOF precursor is obtained after solvothermal reaction, the MOF precursor is washed and dried,then the MOF precursor is treated with the cobalt source, and cobalt source composite MOF is obtained; and (2) the compounded MOF precursor is placed in a protective atmosphere to convert cobalt ionsin a cobalt source into elemental cobalt, a zirconium source into ZrO2 and an organic ligand into a carbon matrix, thereby obtaining the catalyst. According to the preparation method disclosed by theinvention, ZrO2, Co and C are effectively subjected to nanoscale compounding, so that the prepared material has excellent performance.
Owner:SHANDONG UNIV
Process for producing twin crystal inducement plastic steel material with high carbon content
InactiveCN101429590BHigh elongationImprove propertiesTemperature control deviceFurnace typesCrystal twinningHigh carbon
The invention belongs to the field of preparing a steel material and in particular relates to a method for preparing a twin crystal induced plastic steel material with high carbon content. The twin crystal induced plastic steel material comprises the following compositions in the range: 0.2 to 0.49weight percent or 0.55 to 1.5weight percent of C, 10 to 22weight percent or 23.1 to 35weight percentof Mn, less than 1weight percent of Al, less than 1weight percent of Si, less than 0.008 percent of S, less than 0.02 percent of P and the balance being Fe and inevitable impurities. The preparation method comprises the following steps: a plate blank prepared through smelting is subjected to a hot rolling process to obtain a hot rolled sheet in a use state; or the plate blank is subjected to hot rolling and cold rolling to obtain a cold rolled sheet; the sheet is subjected to heat treatment in order that the tensile strength is between 750 and 1,200 MPa, the yield strength is between 230 and 615 MPa, the extension rate is between 45 and 70 percent; and no tough brittle turning point exists at a temperature of more than 100 DEG C. The steel material with high strength and high plasticity has excellent comprehensive mechanical performance, machining performance and forming performance, can be used for a steel rail of a railroad, automobile manufacture, engineering machinery, an oil and gas transportation pipeline, a liquefied natural gas transportation ship, war industry and other industries and has important value and great application space for an automobile industry and a war industry with rapid development.
Owner:UNIV OF SCI & TECH BEIJING
A kind of preparation method of magnesium nitrogen co-doped high specific surface area biomass activated carbon
ActiveCN109502585BUnique three-dimensional connected hole structureRealize comprehensive utilizationCarbon compoundsActivated carbonCarbonization
The invention discloses a preparation method and application of a high specific surface area biomass activated carbon material co-doped with magnesium and nitrogen. The activated carbon has a unique three-dimensional composite pore structure of macropores-mesopores-micropores, which is characterized by co-doping of magnesium and nitrogen. The method uses biomass waste hemp core as raw material. After cleaning, drying and shearing pretreatment, the raw material is soaked in a mixed solution of zinc chloride and magnesium chloride for a period of time, dried and put into a tube furnace. Carbonization activation and cooling under the atmosphere. After the resultant is acid-washed and washed with water, it is immersed in an ethanol solution of aminopyridine for a period of time and then dried to obtain the activated carbon co-doped with magnesium and nitrogen. The activated carbon has a high specific surface area and exhibits excellent carbon dioxide gas adsorption performance.
Owner:GUIZHOU INST OF TECH
A kind of preparation method of non-spherical silicon dioxide particle
A method for preparing non-spherical silicon dioxide particles of the invention belongs to the technical field of nano particle preparation. Using tetraethyl orthosilicate as the silicon source, ammonia water as the catalyst, and quaternary ammonium salts as the morphology regulator, the “sea urchin-like” or “beam-like” is prepared by the sol-gel method in the alcohol / water system. Silica particles. The preparation conditions of the invention are mild, the environment is friendly, and the prepared silicon dioxide particle has a unique shape and structure, and has very superior application value in the aspects of drug carrier, drug delivery, hard template agent and the like.
Owner:JILIN UNIV
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