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55results about How to "Avoid high temperature sintering" patented technology
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Catalyst with meso pore characteristics and application thereof
InactiveCN102240570AGood dispersionHigh catalytic activityMolecular sieve catalystsDispersed particle separationAdditive ingredientMulti pollutant
The invention discloses a catalyst with meso pore characteristics and an application thereof. The catalyst with meso pore characteristics is produced by loading ingredients with catalytic activity onto the inner tunnel surface of a meso pore molecular sieve carrier, wherein the meso pore molecular sieve carrier contains one or more elements selected from the group consisting of MCM-41, MCM-48, SBA-15, SBA-16, KIT-5 and KIT-6 with the aperture being from 2nm to 50nm; and the active ingredients contain one or more elements selected from the group consisting of Co, Fe, Ni, Mn, Cr, Ti, Cu, Mg, Nb, Ta, Mo, W, Zn, Zr, Ru, Ag, Au, Ru, Rh, Pt, Re, Al, W, Ga, Ge, Sn, Sb and metal oxide thereof. The catalyst with meso pore characteristics can be applied to the catalytic purification of tail gases containing nitrogen oxide. The catalyst provided by the invention has high catalytic activity and is suitable for a plurality of pollutants; in addition, the active ingredients of the catalyst are fixed so as to avoid loss, volatilization and high-temperature sintering.
Owner:BEIJING UNIV OF CHEM TECH
Catalyst for growing three-dimensional carbon nanotube/grapheme composite material and preparation method of catalyst
ActiveCN102784648AGood dispersionAvoid reunionElectrolytic capacitorsCatalyst activation/preparationActive componentCarbon nanotube
The invention belongs to the technical field of new nano materials and particularly relates to a catalyst for growing a three-dimensional carbon nanotube / grapheme composite material and a preparation method of the catalyst. The catalyst is formed by taking urea as a precipitator and uniformly precipitating nitrate as an active component on a graphene oxide carrier of which the surface is adsorbed with a surfactant. The method is simple and controllable; the activity of the catalyst is high; and the prepared three-dimensional carbon nanotube / grapheme composite material is regular in morphology.
Owner:四川天策聚材科技有限公司
Catalyst for purifying automobile exhaust
ActiveCN102921448AGood dispersionHigh catalytic activityMolecular sieve catalystsDispersed particle separationNitric oxideMesoporous material
The invention discloses a catalyst for purifying automobile exhaust and a preparation method of the catalyst. The catalyst belongs to the technical field of environmental-protection catalysis. The catalyst is an integrated catalyst comprising a carrier and a coating. The coating is of a double-layer structure, wherein the first layer is formed by directly coating alumina and an assistant on the carrier; the second layer is formed by coating the alumina, the assistant and a mesoporous material on the first coating; and the mesoporous material comprises one or more mesoporous characteristic catalysts. The catalyst is low in cost and higher in catalyzing activity, and can greatly reduce pollutants generated in emission of the automobile exhaust such as nitric oxide, carbon monoxide and hydrocarbon carbon, so that the emission of an automobile meets a national standard (GB 18285-2005), and therefore, a purpose of protecting the environment can be achieved.
Owner:SHANXI PROVINCIAL RES INST OF COMM
Perovskite solar cell structure and preparation method thereof
ActiveCN105336864APromote absorptionImprove light absorption capacityFinal product manufactureSolid-state devicesMetal particleHole transport layer
The invention relates to a perovskite solar cell structure which sequentially comprises a cathode transparent conducting substrate, an electron transport layer, a perovskite layer, a hole transport layer and a metal anode. The electron transport layer is a titanium dioxide-coated metal particle core-shell layer. TiO2 coats the Au / Ag core-shell layer to directly serve as the electron transport layer, a special electron transport layer does not need to be manufactured additionally, and a preparation process is simplified. Light absorption by the perovskite layer is promoted by utilizing a plasmon enhancement effect of nano particles, and the light absorption effect of a solar cell is improved. According to the preparation method, the electron transport layer is prepared by adopting a solvent low-temperature process, the use of the steps such as high-temperature sintering in the prior art is avoided, the preparation process is further simplified, and the production cost is reduced. Due to the fact that TiO2 coats the metal particle core-shell layer to serve as the electron transport layer to be directly formed on the cathode transparent conducting substrate in solution rather than be formed through a spin coating process, the structure is more compact, and the electron transport effect is better.
Owner:NINGBO UNIV
Flexible and transparent conductive thin film and preparation method thereof
InactiveCN108470598AIncreased substrate adhesionReduce surface roughnessConductive layers on insulating-supportsCable/conductor manufactureSurface layerConductive polymer
The invention discloses a flexible and transparent conductive thin film and a preparation method thereof. The structure of the flexible and transparent conductive thin film is characterized in that transparent and flexible plastic is used as a substrate, and a surface-modified graphene layer, a metal nanowire layer and a conductive polymer layer are sequentially arranged from bottom top. The preparation method comprises the following steps of 1) preparing a graphene oxide dispersing liquid, adding dopamine for oxidation polymerization reaction, and removing a product which does not react aftercompletion to obtain dopamine-grafted graphene; 2) respectively preparing a dopamine-grafted dispersing liquid and a metal nanowire dispersing liquid which are sequentially marked as a first dispersing liquid and a second dispersing liquid, and adding a conductive doping agent into a conductive polymer solution to obtain a first solution; and 3) sequentially attaching the first dispersing liquid,the second dispersing liquid and the first solution onto the substrate layer by layer, and performing drying to obtain the flexible and transparent conductive thin film. According to the method, thebonding strength between the conductive layer and the flexible plastic layer is improved by a graphene surface layer winkle structure and the adhesion of the polydopamine, meanwhile, a high-temperature condition is not needed, and the flexible plastic substrate cannot be damaged.
Owner:TIANJIN POLYTECHNIC UNIV
Method for reducing grain boundary impedance and interface impedance of oxide electrolyte
ActiveCN111509293AHigh ion conductivityImprove electrochemical performanceCell electrodesSecondary cellsPhysicsSolid-state battery
The invention belongs to the technical field of solid-state battery materials, and particularly relates to a method for reducing grain boundary impedance and interface impedance of an oxide electrolyte. The method is characterized in that a halide electrolyte membrane is formed on the surfaces of oxide electrolyte particles or the surfaces of electrode particles. The crystal grain interface of theoxide electrolyte particles is modified by the halide electrolyte, so that the grain boundary impedance can be effectively reduced, and the aim of preparing the oxide solid electrolyte sheet by adopting a room-temperature cold pressing technology is fulfilled; the halide electrolyte membrane plays a role in bonding grain boundaries of particles and providing ionic conductance, so that the oxide solid electrolyte sheet can be prevented from being prepared by high-temperature sintering, and the obtained oxide-halide composite electrolyte sheet has very high ionic conductance. Similarly, the halide electrolyte is used for modifying the electrode particles so as to modify the interface of the active electrode material and the oxide solid electrolyte sheet, so that the active electrode material and the oxide solid electrolyte sheet are in close contact, the interface impedance is effectively reduced, and the obtained solid-state battery can normally work at room temperature and release good electrochemical performance.
Owner:CHINA AUTOMOTIVE BATTERY RES INST CO LTD +1
Device for crushing and grinding uranium ores through assistance of 915MHz pulse microwave irradiation and control method
ActiveCN105944810ALow mechanical strengthGood for grindingGrain treatmentsUranium orePulse microwave
The invention relates to a device for crushing and grinding uranium ores through assistance of 915MHz pulse microwave irradiation and a control method. The device comprises five main parts of: a 915MHz microwave source generator, a microwave circulator, a water load, wave guide tubes and a microwave resonant heating cavity. After the uranium ores are irradiated by high-power pulse microwave emitted by the device, the mechanical strength of the uranium ores is reduced, the dissociation degree of the uranium ores is increased, and the crushing and the grinding of the uranium ores and the leaching of uranium minerals are facilitated. Compared with traditional continuous microwave irradiation, the pulse microwave irradiation is lower in consumption and better in assistance of the crushing and grinding effect, and can effectively prevent high-temperature sintering.
Owner:NANHUA UNIV
Preparation method of synthetic gas methanation catalyst
InactiveCN102626628AImprove stabilityLimit anchorHydrocarbon from carbon oxidesGaseous fuelsPtru catalystMethanation
The invention discloses a preparation method of a synthetic gas methanation catalyst. The preparation method is characterized in that a polyoxyethylene-polyoxypropylene-polyoxyethylene triblock copolymer, one or more aluminum sources, nickel nitrate and one or more auxiliaries as raw materials undergo a one-step synthesis reaction according to a certain ratio by a solvothermal method to produce a desired product. The preparation method has simple processes. The synthetic gas methanation catalyst obtained by the preparation method has a mesoporous structure and controllable aperture sizes and catalyst particle dispersity, can show good sintering resistance, high activity at a low temperature, stability at a high temperature and high methane selectivity in methanation, and has important application values in synthesis of substitute natural gas and solution of the existing natural gas shortage problem.
Owner:TAIYUAN UNIV OF TECH
Method for casting thick-wall nodular iron casting of blower in power plant
InactiveCN101716671AImprove production success rateSolve the problem of sticky sandFoundry mouldsFoundry coresFine structureThick wall
The invention relates to a method for casting a fine structure of a thick-wall nodular iron casting, in particular to a method for casting the thick-wall nodular iron casting of a blower in a power plant, which comprises the steps of core bar manufacturing, core manufacturing, molding, mould assembling, pouring and sand falling and cleaning; the invention provides the method for casting the thick-wall nodular iron casting of the blower in the power plant; and the process method is unique, can improve the success ratio of sand core production, reduce the difficulty of core manufacturing and solve the problem that sand is adhered in pores.
Owner:NINGXIA KOCEL GRP CO LTD +1
Method for preparing metal powder by plasma spheroidizing
InactiveCN109570521AHigh bulk densityImprove powder flowabilityAdditive manufacturing apparatusMetal powderPumping vacuum
The invention discloses a method for preparing metal powder by plasma spheroidizing. The method comprises the following steps of 1) feeding the raw metal powder into a ball mill for grinding, and fully drying; 2) carrying out pre-pumping vacuum treatment on a smelting chamber and an atomizing chamber, and filling inert gas; 3) smelting the metal powder to form a metal melt; and 4 ) atomizing and hydrogenating the metal melt by adopting a double-layer atomizing nozzle to prepare metal powder; 5) after the metal powder is cooled, and collecting the metal powder through cyclone separation; 6) establishing a stable operation argon plasma torch, feeding the metal powder into a core-part high-temperature zone of the plasma torch, and rapidly melting the metal powder to form metal molten drops; and 7) the metal molten drops enter the powder spheroidization chamber, and condensing to form spherical metal powder. According to the method for preparing the metal powder by the plasma spheroidizing, the atomization method and the plasma method are combined, the prepared metal powder is high in loose packing density, and the powder fluidity is obviously improved.
Owner:NANTONG JINYUAN INTELLIGENT TECH CO LTD
Graphite paper-barium titanate/polymide integrated composite thin-film capacitor
ActiveCN104036957ADirectly Test Dielectric PropertiesImprove thermal stabilityLiquid surface applicatorsThin/thick film capacitorBarium titanateGraphite
The invention relates to a graphite paper-barium titanate / polymide integrated composite thin-film capacitor. The graphite paper-barium titanate / polymide integrated composite thin-film capacitor comprises one or more layers of graphite-paper inner electrodes, dielectric layers among the inner electrodes and end electrodes at two ends. The graphite-paper-barium titanate / polymide integrated composite thin-film capacitor is characterized in that tatanate / polymide composite films are used as the dielectric layers, and the dielectric layers are integrally manufactured by graphite paper as carriers by means of the Czochralski method; the polymide is used as shell packing materials. The graphite-paper-barium titanate / polymide films are made by the Czochralski method, and solvent is removed and air microbubbles easy to cause breakdown are eliminated by reaction of vacuum heat imidization, so that dielectric constant is increased and the graphite paper-barium titanate / polymide integrated composite thin-film capacitor high in dielectric performance is manufactured. The manufactured thin-film capacitor has higher thermal stability, small thickness, high dielectric constant and low dielectric loss, energy loss caused by high-temperature sintering is avoided, and large-area manufacturing is realized.
Owner:OCEAN UNIV OF CHINA
High-temperature-resistant methanation catalyst and preparation method thereof
ActiveCN105797731AHigh activityImprove anti-sintering performanceHeterogenous catalyst chemical elementsGaseous fuelsAluminateAlkaline earth metal
The invention discloses a high-temperature-resistant methanation catalyst. The high-temperature-resistant methanation catalyst comprises an active component, a carrier and / or an assistant. Nickel serves as the active component, the carrier is mesoporous nickel aluminate spinel, and the assistant is one or more of oxides of alkaline earth metals magnesium, calcium, strontium and barium. The invention further discloses a preparation method of the high-temperature-resistant methanation catalyst. Soluble nickel salt and soluble salt of the assistant are dissolved in water to form impregnation liquid; the mesoporous nickel aluminate spinel carrier is added to the impregnation liquid for impregnation, then drying and calcination are conducted, and then the high-temperature-resistant methanation catalyst is obtained. The high-temperature-resistant methanation catalyst is used at high temperature, the anti-sintering capacity of active center nickel is high, and activity is stable. The production method is simple, and industrial enlarged production is promoted.
Owner:XIAN SUNWARD AEROSPACE MATERIAL CO LTD
Hollow fiber ceramic membrane production method
InactiveCN104785123AImprove fracture toughnessAvoid high temperature sinteringSemi-permeable membranesWater/sewage treatment bu osmosis/dialysisNitrogen pressureNitrogen gas
A hollow fiber ceramic membrane production method comprises the following steps: adding polyethersulfone particles into an n-methyl-2-pyrrolidone solution, dissolving to form a polymer solution, adding polyvinylpyrrolidone, and uniformly mixing; slowly adding Fe2O3 and YSZ mixed powder, fully stirring, and preparing a spinning solution; pouring the spinning solution into a stainless steel container, and carrying out vacuum deaeration at room temperature for 2h to remove bubbles dissolved in the stirring process; and spinning by adopting an air gap technology, extruding the spinning solution from a spinning nozzle into an external coagulant aid tap water at a speed of 20-30mm / s under a nitrogen pressure of 0.1MPa under an air gap of 150-300mm, and standing the above obtained hollow fiber ceramic membrane precursor in tap water for 14-34h.
Owner:HAIMEN SENDA DECORATION MATERIAL CO LTD +1
Nickel-based oxygen vacancy carrier catalyst as well as preparation method and application thereof
ActiveCN111604045AImprove catalytic stabilitySolving activityHydrogenHydrogen/synthetic gas productionCatalytic reformingPtru catalyst
The invention provides a nickel-based oxygen vacancy carrier catalyst as well as a preparation method and application thereof, and belongs to the field of catalytic reforming and diesel hydrogen production. With the catalyst provided by the invention adopted, the problems of low activity, easy coking and poor sulfur resistance of a diesel reforming catalyst can be solved. Cerium dioxide is used asan oxygen carrier; heterovalent metal La is doped in the CeO2 to reduce oxygen vacancy generation energy; the enhancement of the oxygen storage and release capacity of the carrier can inhibit side reactions so as to improve the activity of a main reaction. Diesel oil H / C is low, a large amount of carbon deposits are likely to occur during reforming; when coking occurs, the oxygen vacancy carriercan release more oxygen to oxidize the carbon deposits, so that coking inactivation of the catalyst is avoided. Ni particles are smaller in size and more uniform in distribution, so that the catalyticactivity of the catalyst is improved, and the catalyst can still keep excellent reforming performance after part of active metal sulfur is poisoned; the oxide of lanthanum is mainly distributed on asurface phase, so that high-temperature stability of the catalyst can be improved, and high-temperature sintering of the catalyst carrier is avoided.
Owner:TSINGHUA UNIV
Method and equipment for deoxidizing low-concentration oxygen-containing coal bed gas
The invention discloses a method for deoxidizing a low-concentration oxygen-containing coal bed gas. The method comprises the following steps: preheating a fixed bed deoxidization reactor; feeding the oxygen-containing coal bed gas into the reactor after penetrating through a flame arrester, a preheater and a preheater bypass; carrying out deoxidization reaction when the reaction temperature is 350-650 DEG C, the operation pressure is 0-0.4MPa and the gaseous hourly space velocity is 2,000-20,000h<-1>; feeding a hot deoxidized coal bed gas into the preheater and exchanging heat with a cold oxygen-containing coal bed gas; and feeding the cooled oxygen-containing coal bed gas into a cooler, cooling and dewatering, and feeding to a coal bed gas delivery pipeline. The method has the advantages of being good in safety, good in deoxidization effect, low in investment, convenient to operate and low in operation cost.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
High-density and long-life data storage disk and preparation method thereof
InactiveCN104700852AAddressing Chemical StabilityAchieve preservationRecord information storageOptical record carrier manufactureGold nanorodHigh density
The invention belongs to the technical field of optical information storage. A high-density and long-life data storage disk is characterized in that the surface of a glass substrate is covered with a thin film made from hybrid materials or the internal surface of a flat-bottom container is covered with a plate sample made from the hybrid materials; and high-density gold nanorods are dispersed in the hybrid materials. The data storage disk prepared by the method is stable in thermodynamic property and capable of storing recorded data for a long time.
Owner:WUHAN UNIV OF TECH
Metal oxide cathode material, composite cathode material and battery
ActiveCN112186201ASimple structureImprove thermal stabilityCell electrodesSolid electrolyte fuel cellsAlkaline earth metalComposite cathode
The invention discloses a metal oxide cathode material, and provides a composite cathode material and a battery using the composite cathode material. The chemical formula of the cathode material is A'B' yB 'xyO5 + / -delta, wherein A' is one of alkaline earth metal elements of Ba, Sr, Bi, Ce, Gd, Ca, Y and Pr, B 'and B' 'are two different transition metal elements including Fe, Co, Ni, Cu, Ti, Nu,Cr and Sc, and x satisfies the relational expression that 1.5<= x<= 2, y satisfies the relational expression that 0<=y<=1.98,deltaindicates excess or lack of oxygen. The cathode material has high thermal stability at high temperature, which is close to the thermal expansion coefficient of an electrolyte, and is conducive to reducing the decay rate of the battery. The cathode material is particularly suitable for medium-high temperature solid oxide fuel batteries. When the cathode material is applied to a battery, a high-temperature sintering barrier layer is not needed to be arranged between acathode and an electrolyte; in addition, the synthesis process is simple, and the preparation cost of the cathode material and a subsequent battery is greatly reduced.
Owner:浙江氢邦科技有限公司
Single-sheet electrolyte solid oxide fuel battery pack
InactiveCN103956504ARealize concatenationSolve the sealing problemCell electrodesSolid electrolyte fuel cellsFuel cellsPower flow
A disclosed single-sheet electrolyte solid oxide fuel battery pack comprises electrolyte sheets, cathode films, anode films and connectors; one surface of each electrolyte sheet is provided with multiple cathode films at intervals, the other surface of each electrolyte sheet is provided with multiple anode films at intervals, and the cathode films and the anode films have same shape and size and are arranged oppositely; each electrolyte sheet is provided with a connection hole between two adjacent cathode films or anode films, the connector penetrates the connection hole, one end of the connector is connected with the cathode film on one surface of the electrolyte sheet, and the other end of the connector is connected with the anode film on the other surface of the electrolyte sheet, so that serial connection is formed; and the connector employs metal silver or a lanthanum chromate ceramic material. Multi-section serial-connection solid oxide fuel battery pack is prepared by employing the single-sheet electrolyte. The battery pack employs electrolyte support, so that the stability of the battery performances is facilitated; and through the ingenious design to the connection holes and the connectors, the battery pack has the advantages of high output voltage and power density, good sealing property and current collection convenience.
Owner:SOUTH CHINA UNIV OF TECH
High-performance electric furnace cover
InactiveCN107162610AGood sintering performanceGood peeling resistanceFurnace componentsSlagSillimanite
The invention aims at providing a high-performance electric furnace cover. The high-performance electric furnace cover is prepared from the following components in percentage by weight: 18-33 percent of fused alumina zirconia, 15-25 percent of tabular corundum particles, 8-12 percent of electro-fused mullite particles, 3-6 percent of sillimanite particles, 3-8 percent of zincochromite powder, 8-15 percent of calcium aluminate cement, 2-6 percent of alpha-Al2O3 micropowder, 5-8 percent of Fe3Si powder, 4-6 percent of beta-sialon powder and 0.4-0.6 percent of additives. The high-performance electric furnace cover is applicable to an electric furnace environment having a relatively high molten iron blending proportion, has excellent sintering performance, iron slag erosion resistance and thermal shock resistance, and has good peeling resistance in the using process.
Owner:嘉兴新耐建材有限公司
Preparation method of efficient Co/CNTs catalyst for Fischer-Tropsch synthesis reaction
ActiveCN110918098AGood dispersionHigh selectivityCatalyst activation/preparationLiquid hydrocarbon mixture productionNano catalystPtru catalyst
The invention relates to the technical field of nano catalysts, in particular to a preparation method of an efficient Co / CNTs catalyst for a Fischer-Tropsch synthesis reaction. The glow discharge plasma is introduced into the preparation of a supported Co / CNTs catalyst to explore the influence of plasma treatment in different inert atmospheres on the Fischer-Tropsch synthesis catalytic performance. Research results show that the Co / CNTs catalyst is treated by the inert atmosphere plasma, the reduction performance is improved while high dispersion of cobalt is kept on the premise that preciousmetal auxiliaries are not added for modification, and higher (3-4 times) Fischer-Tropsch synthesis reaction activity is shown in comparison with the sample obtained through the corresponding traditional roasting method. Particularly, the Co / CNTs catalyst is treated by adopting argon plasma, the catalyst also shows the optimal reaction stability while showing the optimal Fischer-Tropsch synthesis reaction activity and obvious inactivation does not occur in a 100h reaction.
Owner:SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
Self-sintering nano-copper soldering paste and preparation method and use method thereof
PendingCN114535863APromote sinteringImprove antioxidant capacityWelding/cutting media/materialsSoldering mediaBenzoic acidChemical reaction
The invention belongs to the technical field of welding materials, and particularly relates to self-sintering nano-copper soldering paste and a preparation method and using method thereof.The self-sintering nano-copper soldering paste comprises a nano-copper particle layer and a sintering aid layer, the surfaces of nano-copper particles are coated with citric acid layers, and the sintering aid layer comprises a complexing agent and a reducing agent; the complexing agent comprises at least one of sodium alginate, o-hydroxybenzoic acid and acrylic resin, and the reducing agent comprises at least one of hydrazine, hydrazine hydrate and ethylenediamine. According to the method, sintering can be achieved only by means of heat release of a chemical reaction, expensive specific equipment and a reducing atmosphere without extra atmosphere and heating, high-temperature sintering is avoided, meanwhile, high-temperature service is guaranteed, and the sintering performance is good.
Owner:重庆平创半导体研究院有限责任公司
Refractory material used for cover of electric furnace
InactiveCN107098685AImprove sinterabilityGood resistance to iron slag corrosionElectric furnaceProcess efficiency improvementElectric arc furnaceSlag
The invention is direct at providing a refractory material used for a cover of an electric furnace. The refractory material comprises, by weight, 18-33% of chromium corundum, 15-25% of tabular corundum granules, 8-12% of electric-smelting mullite granules, 3-6% of sillimanite granules, 3-8% of zincochromite powder, 8-15% of calcium aluminate cement, 2-6% of alpha-Al2O3 micropowder, 5-8% of Fe3Si powder, 4-6% of beta-Theron powder, and 0.4-0.6% of an additive. The refractory material is suitable for an electric furnace with high addition ratio of molten iron, has excellent sintering performance, anti-iron-slag-erosion performance and thermal shock stability, and has good anti-stripping performance during use.
Owner:嘉兴新耐建材有限公司
Metal heat-conducting substrate and manufacturing method thereof
InactiveCN101894762BSimple designSimple processSemiconductor/solid-state device detailsSolid-state devicesHeat conductingMiniaturization
The invention relates to the technical field of electronic packaging and discloses a metal heat-conducting substrate and a manufacturing method thereof. An insulating medium slurry layer is printed on a metal substrate and molten by a laser ablation method to form an insulating medium layer, and a metal circuit slurry layer is printed on the insulating medium layer and molten by the laser ablation method to form a metal circuit layer, so that a well-insulated radiating passage is provided. The laser melting method has the advantages of achieving extremely high pattern accuracy, contributing to product miniaturization and precision, simplifying the technology of a manufacturing process, preventing pollution, saving materials, lowering cost and achieving good radiating effect.
Owner:SHENZHEN UNIV
A method and equipment for deoxidizing low-concentration oxygen-containing coalbed methane
ActiveCN104629842BAvoid high temperature sinteringSimple controlGaseous fuelsFlame arresterFixed bed
The invention discloses a method for deoxidizing a low-concentration oxygen-containing coal bed gas. The method comprises the following steps: preheating a fixed bed deoxidization reactor; feeding the oxygen-containing coal bed gas into the reactor after penetrating through a flame arrester, a preheater and a preheater bypass; carrying out deoxidization reaction when the reaction temperature is 350-650 DEG C, the operation pressure is 0-0.4MPa and the gaseous hourly space velocity is 2,000-20,000h<-1>; feeding a hot deoxidized coal bed gas into the preheater and exchanging heat with a cold oxygen-containing coal bed gas; and feeding the cooled oxygen-containing coal bed gas into a cooler, cooling and dewatering, and feeding to a coal bed gas delivery pipeline. The method has the advantages of being good in safety, good in deoxidization effect, low in investment, convenient to operate and low in operation cost.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Low-temperature solution method synthesis process of novel long-afterglow perovskite crystal
ActiveCN112898967AHigh transparencyCrystal facetLuminescent compositionsManganese compoundsManganeseSingle crystal
The invention discloses a novel long-afterglow perovskite crystal low-temperature solution method synthesis process, and the process comprises the following steps: 1) putting cesium chloride, silver chloride, indium chloride, manganese chloride, disodium ethylene diamine tetraacetate and concentrated hydrochloric acid into a polytetrafluoroethylene liner, and then sealing the polytetrafluoroethylene liner in a stainless steel high-pressure kettle; (2) putting the stainless steel high-pressure kettle into a muffle furnace, heating the stainless steel high-pressure kettle to 180 DEG C within 1 hour, keeping the temperature for 12 hours, slowly cooling the muffle furnace to 80 DEG C within 24-106 hours, and finally naturally cooling the muffle furnace to room temperature; 3) opening the reaction kettle, discarding the supernatant liquid, placing the bottom crystal on absorbent paper, flushing the single crystal for 3-5 times by using isopropanol, and then adsorbing the isopropanol on the surface by using filter paper to obtain the perovskite long afterglow crystal. According to the invention, a high-temperature calcination process confronted by a long-lasting long-afterglow material is avoided, the long-afterglow performance of a single crystal material is realized, and possibility is provided for application of the long-afterglow material in the fields of noctilucent gemstones and the like.
Owner:UNIV OF JINAN
Preparation method of pure or composite hexagonal boron nitride densified macroscopic body
ActiveCN113929430AThe source is easy to getSimple hot pressing methodPolymer scienceMacroscopic scale
The invention discloses a preparation method of a pure or composite hexagonal boron nitride densified macroscopic body. The preparation method of the pure hexagonal boron nitride densified macroscopic body comprises the following steps of: (1) obtaining a raw material which is hexagonal boron nitride nanosheet powder with a solvent content of 0-10 wt%; and (2) carrying out hot press molding on the raw material in the step (1) at the temperature of 25-500 DEG C to obtain the hexagonal boron nitride densified macroscopic body. The forming temperature of the hexagonal boron nitride macroscopic body can be greatly reduced, and the prepared hexagonal boron nitride densified macroscopic body has the characteristics of high density, high strength, high thermal stability and high chemical stability.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
Composite solid electrolyte and lithium ion battery comprising same
PendingCN113285117AImprove performanceReduce impuritySecondary cellsElectrolytesSolid state electrolytePhysical chemistry
The invention relates to the technical field of lithium ion batteries, in particular to a composite solid electrolyte and a lithium ion battery comprising the same. According to the composite solid electrolyte, impurities on the surface of the oxide solid electrolyte can be eliminated, the oxide solid electrolyte is converted into lithium halide in situ, continuous reaction between the oxide solid electrolyte and water and carbon dioxide in air can be blocked through formation of the lithium halide, and the oxide solid electrolyte is not corroded; the stability of the oxide solid electrolyte in the air is improved; meanwhile, the introduced sintering aid can be filled in gaps among crystal grains of the oxide solid electrolyte, so that the density of the oxide solid electrolyte is improved, the grain boundary resistance of the oxide solid electrolyte is reduced, and the performance of the composite solid electrolyte is further improved.
Owner:ZHUHAI COSMX BATTERY CO LTD
A kind of high temperature resistant methanation catalyst and preparation method thereof
ActiveCN105854889BLarge specific surface areaHigh activityHeterogenous catalyst chemical elementsCatalyst activation/preparationOXALIC ACID DIHYDRATEMethanation
Owner:XIAN SUNWARD AEROSPACE MATERIAL CO LTD
Catalyst for selective catalytic reduction denitration and preparation method thereof
PendingCN113769734AGuaranteed plasticityImprove adsorption capacityDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsCalcium silicateOXALIC ACID DIHYDRATE
The invention discloses a catalyst for selective catalytic reduction denitration and a preparation method thereof, and the preparation method comprises the following steps: weighing titanium dioxide, adding stearic acid and lactic acid, and uniformly performing stirring and mixing; adding ammonia water, deionized water, glass fiber and broad-leaved tree pulp into the mixed material, adding hot oxalic acid solution of ammonium metavanadate, ammonium paratungstate and ethanolamine into the mixed material, performing mixing, adding acetic acid solution of cerium carbonate and manganese carbonate, performing stirring and mixing, adding calcium silicate and barium sulfate, and adding a carboxymethyl cellulose aqueous solution, ethylene oxide and deionized water; adjusting the pH value of the solution by adopting ammonia water, and shaping, drying and calcining the mixed material after vacuum treatment to obtain the catalyst. The catalyst is reasonable in component, simple in process and controllable in cost, and by adding cerium oxide and manganese dioxide into the vanadium-titanium-tungsten-based denitration catalyst, the SO2 conversion rate of the vanadium-based catalyst is reduced, the use temperature range of the vanadium-based catalyst is widened, and the denitration efficiency of the catalyst under the low-temperature effect is improved.
Owner:XIAN THERMAL POWER RES INST CO LTD
Graphite Paper Barium Titanate/Polyimide Integrated Composite Film Capacitor
ActiveCN104036957BDirectly Test Dielectric PropertiesImprove thermal stabilityLiquid surface applicatorsThin/thick film capacitorComposite filmBarium titanate
The invention relates to a graphite paper-barium titanate / polymide integrated composite thin-film capacitor. The graphite paper-barium titanate / polymide integrated composite thin-film capacitor comprises one or more layers of graphite-paper inner electrodes, dielectric layers among the inner electrodes and end electrodes at two ends. The graphite-paper-barium titanate / polymide integrated composite thin-film capacitor is characterized in that tatanate / polymide composite films are used as the dielectric layers, and the dielectric layers are integrally manufactured by graphite paper as carriers by means of the Czochralski method; the polymide is used as shell packing materials. The graphite-paper-barium titanate / polymide films are made by the Czochralski method, and solvent is removed and air microbubbles easy to cause breakdown are eliminated by reaction of vacuum heat imidization, so that dielectric constant is increased and the graphite paper-barium titanate / polymide integrated composite thin-film capacitor high in dielectric performance is manufactured. The manufactured thin-film capacitor has higher thermal stability, small thickness, high dielectric constant and low dielectric loss, energy loss caused by high-temperature sintering is avoided, and large-area manufacturing is realized.
Owner:OCEAN UNIV OF CHINA
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