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Graphene composite material for cathode of lithium ion battery and preparation method of graphene composite material
ActiveCN102683657AGood electrical conductivityLow priceCell electrodesSecondary cellsCvd grapheneStructural stability
The invention relates to a graphene composite material for a cathode of a lithium ion battery and a preparation method of the graphene composite material, belonging to the technical field of preparation of the electrodes of the lithium ion batteries. The preparation method of the graphene composite material for the cathode of the lithium ion battery comprises the steps of: oxidizing and ultrasonically dispersing a graphene material in a concentrated acid environment, then mixing the obtained graphene material with a titanium source, and drying and calcining an obtained mixture to obtain the graphene composite material. The graphene composite material for the cathode of the lithium ion battery, provided by the invention, is high in electric conductivity; an obtained electrode slice is low in resistance and has structural stability in a charge / discharge process; and the prepared lithium ion secondary battery is high in capacity, good in safety, favorable in cyclic performance and long in service life.
Owner:THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
Method for improving gallium nitride based transistor material and device performance using indium doping
ActiveCN101114594AFree diffusionIncrease the diffusion distanceSemiconductor/solid-state device manufacturingGas phaseSingle crystal
The invention discloses a method of increasing the properties of the gallium nitride-based transistor material and device with indium doping and applies in the field of making gallium nitride-based HEMT or HFET materials and devices. The method and process is to form the gallium nitride-based high electron mobility transistor or heterostructure field effect transistor materials on SiC or Si single crystal substrate grown by metal-organic chemical vapor deposition epitaxial growth system. After the AlN or AlGaN nucleating layer and the GaN buffer layer are grown on the SiC or Si single crystal substrate, a GaN channel layer, an AlN insert layer, an AlGaN barrier layer and a GaN capped layer are grown, and trimethyl indium is added in the growth atmosphere to do epitaxial growth with indium doping. The dislocation of the material or device made by the method of the invention is reduced greatly. The invention improves the interfacial smoothness, increases the electron mobility of the material, increases the growth window, ensures the material grow easier, improves the current collapse of the device, reduces the leakage current and increases transconductance and gain and increases the output power of microwave power devices.
Owner:THE 13TH RES INST OF CHINA ELECTRONICS TECH GRP CORP
Graded porous nano alumina/gold composite film electrode and preparation method thereof
InactiveCN102183558AImprove electrocatalytic activityImprove electron transfer efficiencyVacuum evaporation coatingSputtering coatingComposite filmConductive polymer
The invention relates to a composite film electrode and a preparation method thereof. The electrode is a graded porous nano composite film which is composed of an insulating substrate, a first binding layer, a conductive gold layer, a second binding layer and a modified aluminum layer, wherein small holes with a hole diameter of 2-20 nm are uniformly distributed on the conductive gold layer according to a distribution density of 1010 / cm2-1012 / cm2, and the small holes with the hole diameter of 20-400 nm are uniformly distributed on the second binding layer and the modified material layer according to the distribution density of 109 / cm2-1012 / cm2; and the preparation method of the electrode comprises the following steps of: firstly, preparing a multi-layer composite film on the insulating substrate, then, performing anodizing and hole enlargement on the multi-layer composite film to implement that an aluminum layer becomes a porous alumina layer, a gold layer becomes a nano porous structure, the second binding layer becomes a porous oxide of tantalum, niobium or titanium, and cleaning and drying the multi-layer composite film to get a finished product of the graded porous nano alumina / gold composite film electrode. The graded porous nano alumina / gold composite film electrode has high in electroanalytical activity and the dual advantages of a nano porous gold and a porous anodizedaluminum; and the preparation method is simple and reliable, solves the defect of inconvenience in operation caused by high brittleness of an AAO, and fits for mass production.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Inorganic ecologic wood, and preparation method and application thereof
The invention provides an inorganic ecologic wood. The inorganic ecologic wood is prepared through using, by weight, 100.0 parts of inorganic gelling powder, 6.0-42.0 parts of a dispersible vegetable fiber, 8.0-25.0 parts of amorphous SiO2 mineralization powder, 0.0-5.5 parts of a modification aid, and 23.5-26.2 parts of a complex formulation solution. The inorganic ecologic wood reserves the good plasticity and environmental protection characteristic of the inorganic material, and has the ecologic functions of formaldehyde cleaning, antibiosis, mildew resistance and negative ion generation. The invention also provides a preparation method of the inorganic ecologic wood, and applications of the inorganic ecologic wood as building materials comprising ecologic board, wood floors, interior and exterior decorative boards or decorative modeling boards and the like.
Owner:HUBEI GREENS NEW BUILDING MATERIALS SCI & TECH YINGCHENG
Method for growing upright three-dimensional netlike noble metal nano-plate on boron-doped diamond substrate
InactiveCN101570872AGood reproducibilityOvercome the disadvantage of low catalytic activityAnodisationMaterial typeNanostructure
The invention relates to a method for growing an upright three-dimensional netlike noble metal nano-plate on a boron-doped diamond substrate, which comprises the following steps: firstly, when electro-deposition is used in an electrochemical technique, using hydrogen bubbles generated on the surface of a boron-doped diamond film substrate material as a dynamic template so as to obtain an upright three-dimensional netlike nano metal plate; and secondly, in the process of performing a chemical method, using the upright three-dimensional netlike nano metal plate as a template, and through substitution reactions, using high valent noble metal to replace the upright three-dimensional netlike nano metal plate so as to obtain the upright three-dimensional netlike noble metal nano-plate on a boron-doped diamond film. The special structure obtained by the method not only can give full play to the advantages of the boron-doped diamond, but also can greatly improve the specific surface area of the noble metal and effectively promote the diffusion of active reaction molecules in a hole pipeline by a netlike nano structure. Simultaneously, the special combination ensures that a working electrode obtains high electrochemical properties in material types and structural shapes.
Owner:TONGJI UNIV
Pichia kudriavzevii embedded tea polyphenol microcapsules and preparation method thereof
InactiveCN109674034AGuaranteed AntioxidantImprove stabilityFood ingredientsFood shapingEmbedding rateHeat resistance
The invention provides pichia kudriavzevii embedded tea polyphenol microcapsules. The microcapsules are characterized in that tea polyphenol yeast microcapsules are specifically prepared through embedding tea polyphenols into yeast cells by utilizing adsorption and assimilation functions of the pichia kudriavzevii. A method is simple in operation steps and low in cost; the embedding rate reaches 68.75 percent and is much higher than that of microcapsule products in the prior art. The tea polyphenol yeast microcapsules prepared by the method also can keep the anti-oxidization performance of theoriginal tea polyphenols; meanwhile, the pichia kudriavzevii has heat resistance and acid and alkali resistance; the tea polyphenol microcapsules can be used for effectively improving the stability of the tea polyphenols under the conditions of illumination and the like.
Owner:OCEAN UNIV OF CHINA
Preparation method of anti-ultraviolet aging polyphenylene benzodioxazole fiber
InactiveCN101906677ADoes not affect mechanical propertiesFree diffusionArtificial filament heat treatmentWet spinning methodsFiberWarm water
The invention relates to a preparation method of an anti-ultraviolet aging polyphenylene benzodioxazole fiber, which comprises the following steps: adding raw materials into a prepolymerizer according to the mixing ratio, removing chlorine hydride gas at certain temperature, gradually increasing the temperature to 160-180 DEG C, carrying out reaction for 12-48h, then transferring into a twin-screw reactor for carrying out postpolymerization, obtaining PBO / PPA spinning solution which is in line with requirements, and quantitatively conveying into a spinning component by a metering pump; and extruding the PBO / PPA spinning solution by a spinneret plate at 150-200 DEG C, passing through an air gap layer of 50-300cm for stretching, then entering into a coagulation bath, passing through a washing process of 50-300m with warm water at about 30-50 DEG C after passing through the coagulation bath, drying at 70-110 DEG C, then winding at the speed of 50-200m, obtaining a PBO protofilament, continuously carrying out heat treatment at 550-650 DEG C and obtaining the high-modulus PBO fiber, wherein an anti-aging agent is added in coagulation bath solution in advance. The anti-ultraviolet aging polyphenylene benzodioxazole fiber has the advantages that the anti-aging agent is closed and retained in the fiber, thereby giving the durable anti-aging property to the fiber; and the process is simple and applicable to the industrial operation.
Owner:EAST CHINA UNIV OF SCI & TECH
Dressing containing trehalose reparable skin barriers and making process of dressing
ActiveCN111467561AImprove repair effectAvoid allergiesBandagesSkin sensitizationHippophae rhamnoides fruit
The invention provides a dressing containing trehalose reparable skin barriers and a making process of the dressing. The dressing comprises the following raw materials in parts by weight of 55-100 parts of trehalose, 13-25 parts of hippophae rhamnoides fruit polysaccharide, 65-95 parts of glycerine, 32-46 parts of sweet almond oil, 13-20 parts of glusulase, 25-35 parts of pentadiol, 3.0-5.0 partsof phenoxyethanol, 2.3-3.5 parts of triethanolamine and 765-852 parts of water. According to the dressing prepared by a specific technology and limited technology parameters, the repair capacity of skin is improved, skin sensibility after laser therapy can be relaxed, and the repair time of damaged skin can be shortened.
Owner:绽妍生物科技有限公司
Biomass-based hydrogel adsorbent of immobilized yeast as well as preparation method and application of biomass-based hydrogel adsorbent
PendingCN110813263AGood adsorption effectEnvironmentally friendlyOther chemical processesWater contaminantsEnvironmental chemistryAqueous solubility
The invention discloses biomass-based hydrogel of immobilized yeast and a preparation method of the biomass-based hydrogel. The hydrogel has a three-dimensional macroporous network structure, adsorption sites are fully exposed, water-soluble small molecules can be freely diffused, and the hydrogel is a dual-network hydrogel adsorbent with very high adsorption efficiency on metal ions in an aqueoussolution. According to the invention, microorganisms with an adsorption effect are immobilized into the gel adsorbent, so that the gel adsorbent can fully diffuse water-soluble small molecular substances, has an excellent adsorption effect on heavy metal ions in water, and is environment-friendly, low in cost and convenient to popularize and use.
Owner:OCEAN UNIV OF CHINA
Method for efficiently removing phosphorus in eutrophic water
ActiveCN109704446AImprove phosphorus removal effectStable emissionsWater/sewage treatmentChemistryRaw material
The invention discloses a method for efficiently removing phosphorus in eutrophic water. The method is concretely characterized in that cement and bentonite are used as a phosphorus removal agent, thephosphorus removal agent contains, by mass, 80% of cement and 20% of bentonite, and the amount of the phosphorus removal agent added to water to be treated is 0.025-0.2% of the mass of the water to be treated. The method comprises the following steps: adding the phosphorus removal agent to the water to be treated, performing uniform mixing, carrying out a reaction, and standing the obtained waterto complete the treatment of the water. The phosphorus removal agent is powdery, can be directly added into the water, and can be uniformly dispersed in and reacted with water, so the method does notneed other special facilities and makes phosphorus removal operation simple. The phosphorus removal agent used in the method of the invention has lower cost than conventional phosphorus removal agents currently used in the market, so the method has the advantages of easily available raw material, and easiness in industrialization realization. The total phosphorus content of the water treated through the method can quickly reach relevant standards.
Owner:SICHUAN UNIV
Conductive glass cleaning method
InactiveCN108919565AImprove surface activityLower contact angleNon-linear opticsEngineeringContact angle
The invention discloses a conductive glass cleaning method. The conductive glass cleaning method includes spraying an alkaline solution on one side of conductive glass with a conductive film for cleaning; spraying alignment liquid on one side of the conductive glass with the conductive film. According to the conductive glass cleaning method, the conductive film on the conductive glass is cleaned through the alkaline solution, the surface activity of the conductive film can be improved, the contact angle between the alignment liquid sprayed later and the conductive film is reduced, and the alignment liquid can be sufficiently and freely diffused on the conductive film to form a uniformly coated alignment film.
Owner:ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
A kind of graphene-doped lithium iron phosphate cathode material and preparation method thereof
ActiveCN102544491BDiffuse fullyFull free diffusionCell electrodesSecondary cellsDoped grapheneFerrous salts
Owner:THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
Method for extracting and separating polysaccharide from codium fragile
InactiveCN110724207APromote rupturePromotes the release of polysaccharidesAntiviralsChromatographic columnEnvironmental chemistry
The invention relates to the technical field of polysaccharide extraction. Aiming at solving the problems of low polysaccharide extraction rate from codium fragile and difficult separation, the invention provides a method for extracting and separating polysaccharide from codium fragile. The method comprises the following steps: performing pretreatment comprising degreasing on codium fragile; thenperforming extracting on the codium fragile with hot water, performing alcohol precipitation, performing standing overnight, performing suction filtration, adding ethanol for washing, and carrying outdehydrating and drying to obtain a crude polysaccharide which is extracted from the codium fragile with hot water; and finally separating the crude polysaccharide which is extracted from the codium fragile with hot water by using a strong anion exchange chromatographic column: concretely performing gradient elution with an NaCl solution, collecting the polysaccharide by a fraction collector, performing pressure-reduced concentration on the eluent of the components, performing dialysis for desalination, and performing freeze drying to obtain the product polysaccharide. According to the method,cell wall rupture and polysaccharide release are greatly promoted through fatty acid ether sodium sulfate and polysorbate-80 active polypeptide in advance, so that the extraction time is reduced, thepolysaccharide extraction rate is reduced, and the polysaccharide with anti-HPV activity is prepared through proper gradient elution in the strong anion exchange chromatographic column.
Owner:ZHEJIANG OCEAN UNIV
Rotating device of mobile satellite antenna
ActiveCN112201956AAvoid strangulationImprove tensile propertiesAntenna supports/mountingsAntennas earthing switches associationSatellite antennasDrive shaft
The invention discloses a rotating device of a mobile satellite antenna. The rotating device comprises an antenna rack, a base, a motor, a driving belt pulley and a driven belt pulley, the base is fixedly connected with a mobile carrier, the antenna rack is rotatably connected with the base, the driving belt pulley is coaxially and fixedly connected with a driving shaft of the motor, the driven belt pulley is coaxially arranged with the central axis of the antenna rack and fixed to the antenna rack, the device is characterized in that a planetary gear train angle limiting mechanism is arrangedon the antenna rack, a winding column is fixedly arranged in the center of the base, a spiral cable sleeves the winding column, a winding fixing seat is fixedly arranged on the antenna rack, one endof the spiral cable is fixed to the winding fixing seat, and the other end of the spiral cable is fixed to the top of the winding column. The rotating device has the advantages that the limiting device is prevented from being triggered possibly when the mobile carrier turns around quickly and reverses by 180 degrees, the phenomenon of satellite loss is avoided, and in addition, a coil of the spiral cable can shrink and diffuse freely in the rotating process of the antenna rack, so that the cable is prevented from being twisted off.
Owner:迪泰(浙江)通信技术有限公司
Glass welding method
ActiveCN113105106AWeld tightlyThe method of welding, including bonding the glass tightlyGlass reforming apparatusGlass productionSiliconHigh heat
The invention relates to a glass welding method. The method comprises the following steps: carrying out laminating treatment on glass; carrying out microwave treatment on the laminated glass; and carrying out welding treatment on the glass subjected to microwave treatment. Firstly, laminating is performed on the glass to enhance the surface interface activity of the glass and promote the combination between glass interfaces; microwave treatment is conducted on the attached glass, microwaves penetrate into the glass, the temperature of the glass is increased through friction generated by the interaction of the microwaves and the glass, the interior and the exterior of the glass are almost heated at the same time, a body heat source state is formed, and the interior and the exterior of the material are heated uniformly and consistently; extra pressurization is not needed, and the glass interface can be freely diffused in the microwave treatment process, so that the effects of tight attachment and no bubble between the glass are realized; and meanwhile, the high temperature generated by the microwaves can enable the interface group of the glass group to have weak connection, and after high-temperature welding, silicon-oxygen bond combination between the glass is promoted, so that the effect of tight connection of the glass plates can be realized.
Owner:WEIDALI IND CHIBI CO LTD
Filter screen, preparation method of the filter screen and filtering device applying the filter screen
ActiveCN112933739AHigh specific surface areaHigh porosityCombination devicesDispersed particle filtrationPhysicsChemistry
The invention relates to a filter screen, a preparation method of the filter screen and a filtering device applying the filter screen. The filter screen comprises a collection base cloth and a nanofiber layer taking the collection base cloth as a substrate, and the nanofiber layer is a nanofiber structure which is prepared by an electrostatic spinning method and has positive charges. The filter screen provided by the invention adopts a nanofiber structure, has the advantages of high specific surface area and high porosity, and can obviously enhance the interception effect on tiny particles.
Owner:NINGBO FOTILE KITCHEN WARE CO LTD
Preparation method of glass immobilized enzyme with biological activity
InactiveCN103205414BImprove bonding forceImprove catalytic performanceOn/in organic carrierOn/in inorganic carrierThermal ageingLactobacillus salivarius
The invention relates to a preparation method of glass immobilized enzyme with a biological activity. The method comprises the following steps of: preparing a microbial emulsion by lactobacillus salivarius and an MRS culture medium; mixing the microbial emulsion, a silicon source, a phosphorus source, calcium salt and MO salt to sol; hydrothermally aging to form gel; drying to obtain xerogel; thermally treating to obtain a porous glass carrier material with biological activity. Enzyme in the duct is directly bonded and fixed with surface by the characteristics of biological activity and compatibility of the porous glass carrier material with biological activity, excellent surface chemical performance, adjustable multi-pore structure and enzyme molecular size matched so as to obtain a porous glass immobilized enzyme biological catalyst with biological activity. The method has the characteristics of high enzyme load, high enzyme activity, good thermal and chemical stabilities, repeated use, no pollution to products and the like, and can be used to the fields of fine chemical industry, food industry, biological chemicals, wastewater treatment, medicines and the like.
Owner:QILU UNIV OF TECH
Method for growing upright three-dimensional netlike noble metal nano-plate on boron-doped diamond substrate
InactiveCN101570872BAvoid destructionMild experimental conditionsAnodisationNano structuringHydrogen bubble
The invention relates to a method for growing an upright three-dimensional netlike noble metal nano-plate on a boron-doped diamond substrate, which comprises the following steps: firstly, when electro-deposition is used in an electrochemical technique, using hydrogen bubbles generated on the surface of a boron-doped diamond film substrate material as a dynamic template so as to obtain an upright three-dimensional netlike nano Zn plate; and secondly, in the process of performing a chemical method, using the upright three-dimensional netlike nano Zn plate as a template, and through substitution reactions, using high valent noble metal to replace the upright three-dimensional netlike nano Zn plate so as to obtain the upright three-dimensional netlike noble metal nano-plate on a boron-doped diamond film. The special structure obtained by the method not only can give full play to the advantages of the boron-doped diamond, but also can greatly improve the specific surface area of the noble metal and effectively promote the diffusion of active reaction molecules in a hole pipeline by a netlike nano structure. Simultaneously, the special combination ensures that a working electrode obtains high electrochemical properties in material types and structural shapes.
Owner:TONGJI UNIV
Method for improving gallium nitride based transistor material and device performance using indium doping
ActiveCN100576467CFree diffusionIncrease the diffusion distanceSemiconductor/solid-state device manufacturingGas phaseSingle crystal
The invention discloses a method of increasing the properties of the gallium nitride-based transistor material and device with indium doping and applies in the field of making gallium nitride-based HEMT or HFET materials and devices. The method and process is to form the gallium nitride-based high electron mobility transistor or heterostructure field effect transistor materials on SiC or Si single crystal substrate grown by metal-organic chemical vapor deposition epitaxial growth system. After the AlN or AlGaN nucleating layer and the GaN buffer layer are grown on the SiC or Si single crystal substrate, a GaN channel layer, an AlN insert layer, an AlGaN barrier layer and a GaN capped layer are grown, and trimethyl indium is added in the growth atmosphere to do epitaxial growth with indium doping. The dislocation of the material or device made by the method of the invention is reduced greatly. The invention improves the interfacial smoothness, increases the electron mobility of the material, increases the growth window, ensures the material grow easier, improves the current collapse of the device, reduces the leakage current and increases transconductance and gain and increases the output power of microwave power devices.
Owner:THE 13TH RES INST OF CHINA ELECTRONICS TECH GRP CORP
A rotating device for a mobile satellite antenna
ActiveCN112201956BAvoid strangulationImprove tensile propertiesAntenna supports/mountingsAntennas earthing switches associationSatellite antennasElectric machine
The invention discloses a rotating device for a mobile satellite antenna, which comprises an antenna frame, a base, a motor, a driving pulley and a driven pulley, the base is fixedly connected to the mobile carrier, the antenna frame is connected to the base in rotation, and the driving pulley is driven by the motor. The shafts are coaxial and fixedly connected, the driven pulley is set coaxially with the central axis of the antenna frame and the two are fixed. The winding post is covered with a spiral cable, and the antenna frame is fixed with a winding fixing seat. One end of the spiral cable is fixed on the winding fixing seat, and the other end of the spiral cable is fixed on the winding post. the top of. The advantage is to prevent the limit device from being triggered when the mobile carrier turns around quickly and changes direction by 180°, and the phenomenon of star loss occurs. In addition, the coil of the helical cable can shrink and spread freely during the rotation of the antenna frame to prevent the cable from being twisted. broken.
Owner:迪泰(浙江)通信技术有限公司
A dressing containing trehalose capable of repairing skin barriers and its manufacturing process
ActiveCN111467561BImprove repair effectAvoid allergiesBandagesSkin sensitizationHippophae rhamnoides fruit
The invention provides a dressing containing trehalose reparable skin barriers and a making process of the dressing. The dressing comprises the following raw materials in parts by weight of 55-100 parts of trehalose, 13-25 parts of hippophae rhamnoides fruit polysaccharide, 65-95 parts of glycerine, 32-46 parts of sweet almond oil, 13-20 parts of glusulase, 25-35 parts of pentadiol, 3.0-5.0 partsof phenoxyethanol, 2.3-3.5 parts of triethanolamine and 765-852 parts of water. According to the dressing prepared by a specific technology and limited technology parameters, the repair capacity of skin is improved, skin sensibility after laser therapy can be relaxed, and the repair time of damaged skin can be shortened.
Owner:绽妍生物科技有限公司
Method for producing plastic components
A plastic part 5 having a main body 1 and a front surface having at least one translucent area distinct from an opaque area is produced through the following steps: the first step wherein an opaque plastic component is injection molded into a member having a recess 2 so that the recess 2 extending from its opening in a surface of the member toward its inside has a shape and a position corresponding to those of the translucent area; and the second step wherein at least the above-mentioned surface of the member is covered with a layer of a colored plastic component so that the layer thin enough to be translucent straddles the opening at the surface of the member.
Owner:TRW AUTOMOTIVE ELECTRONICS & COMPONENTS GMBH & CO KG
Preparation method of anti-ultraviolet aging polyphenylene benzodioxazole fiber
InactiveCN101906677BDoes not affect mechanical propertiesFree diffusionArtificial filament heat treatmentMonocomponent synthetic polymer artificial filamentFiberWarm water
The invention relates to a preparation method of an anti-ultraviolet aging polyphenylene benzodioxazole fiber, which comprises the following steps: adding raw materials into a prepolymerizer according to the mixing ratio, removing chlorine hydride gas at certain temperature, gradually increasing the temperature to 160-180 DEG C, carrying out reaction for 12-48h, then transferring into a twin-screw reactor for carrying out postpolymerization, obtaining PBO / PPA spinning solution which is in line with requirements, and quantitatively conveying into a spinning component by a metering pump; and extruding the PBO / PPA spinning solution by a spinneret plate at 150-200 DEG C, passing through an air gap layer of 50-300cm for stretching, then entering into a coagulation bath, passing through a washing process of 50-300m with warm water at about 30-50 DEG C after passing through the coagulation bath, drying at 70-110 DEG C, then winding at the speed of 50-200m, obtaining a PBO protofilament, continuously carrying out heat treatment at 550-650 DEG C and obtaining the high-modulus PBO fiber, wherein an anti-aging agent is added in coagulation bath solution in advance. The anti-ultraviolet agingpolyphenylene benzodioxazole fiber has the advantages that the anti-aging agent is closed and retained in the fiber, thereby giving the durable anti-aging property to the fiber; and the process is simple and applicable to the industrial operation.
Owner:EAST CHINA UNIV OF SCI & TECH
Smoke detection system and aircraft with same
PendingCN113484205AFree diffusionAvoid affecting ventilation airflowThermometer applicationsParticle suspension analysisSmoke detectorsFlight vehicle
The invention relates to a smoke detection system and an aircraft with the same. The smoke detection system comprises a smoke detection device and a plurality of temperature measuring devices. The smoke detector is arranged in the cabin and is used for sensing the smoke concentration in the cabin and sending out smoke alarm information. The temperature measuring devices are arranged in the cabin and used for sensing the temperature in the cabin. When the temperature sensed by at least one temperature measuring device reaches or exceeds a preset temperature value, the ventilation device of the cabin is controlled to stop ventilation. According to the invention, the smoke detector is directly arranged in the cabin of the aircraft, so that the smoke detector is prevented from being installed in the ventilation pipeline to influence ventilation airflow, and the smoke detector is prevented from sucking dust in the ventilation pipeline to cause false alarm.
Owner:COMAC +1
A low-cost method for uniformly preparing graphene films
InactiveCN105755447BReduce dosageReduce manufacturing costGrapheneChemical vapor deposition coatingMetal catalystCavity pressure
The invention provides a low-cost method for uniformly preparing a graphene film. The method comprises the following steps: heating inlet air, performing high-temperature annealing on a base, introducing a carbon source, performing graphene film growth, and finally cooling. The method is capable of greatly reducing the dosage of reaction gases, effectively utilizing the reaction gases to prepare graphene and lowering the graphene preparation cost; during a preparation process, a continuous pumping link is omitted, so that the loss and energy consumption of a vacuum pump are greatly reduced; graphene growth is rapid, and the method has the advantage of industrialization; the growth environment stability is high, and the problem that growth environment pressure and gas proportion fluctuate due to instable original continuous inlet gas flow and an instable pumping valve is solved; a method of introducing the gases to achieve reaction pressure and then stopping gas introduction without pumping is adopted to maintain cavity pressure, so that the gases freely diffuse on the surface of a metal catalyst and are uniformly distributed, the sheet resistance uniformity of the graphene film is obviously improved, and thus the graphene quality is improved.
Owner:CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
Graded porous nano alumina/gold composite film electrode and preparation method thereof
InactiveCN102183558BImprove electrocatalytic activityImprove electron transfer efficiencyVacuum evaporation coatingSputtering coatingComposite filmNiobium
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
A method for efficiently removing phosphorus in eutrophic water
ActiveCN109704446BAchieve emission standardsImprove phosphorus removal effectWater/sewage treatmentEnvironmental engineeringEnvironmental protection
The invention discloses a method for efficiently removing phosphorus in nutrient-rich water bodies. Specifically, cement and bentonite are used as phosphorus removal agents, and the mass ratio is 80% of cement and 20% of bentonite. The addition amount of the above-mentioned phosphorus removal agent in the water body to be treated is 0.025%-0.2% in parts by mass. The above phosphorus removal agent is added to the water body to be treated, mixed, reacted, and left to stand, and the treatment of the water body can be completed. The dephosphorization agent of the present invention is in powder form and can be directly added into the water body. After being added, it can be evenly dispersed in water and reacted with water. Therefore, the present invention does not need to add other special facilities and equipment, and the dephosphorization operation is simple and convenient. The cost of the phosphorus removal agent used in the method of the invention is lower than that of the conventional phosphorus removal agent currently used in the market, and the raw materials are easy to obtain and easy to realize industrialization. After being treated by the method, the total phosphorus in the water body can quickly reach the relevant standard.
Owner:SICHUAN UNIV
Method of glass fusion
ActiveCN113105106BWeld tightlyImprove surface activityGlass reforming apparatusGlass productionPhysical chemistryGlass sheet
The present invention relates to a method for glass fusion. The method includes the following steps: laminating the glass; microwave processing the glass after the lamination processing; and welding the glass after the microwave processing. First, the glass is laminated to enhance the surface interface activity of the glass and promote the bonding between the glass interfaces; then the laminated glass is subjected to microwave treatment, the microwave penetrates into the glass, and the interaction between the microwave and the glass generates friction. It causes the temperature of the glass to rise, so that the inside and outside of the glass are heated and heated almost at the same time, forming a body heat source state, and the heating inside and outside the material is uniform; no additional pressure is required, and the glass interface will diffuse freely during the microwave treatment process, thus achieving tightness between the glasses. At the same time, the high temperature generated by the microwave can make the interface group of the glass group have a weak connection. After high temperature welding, the silicon-oxygen bond between the glasses can be promoted, and the tight connection of the glass sheets can be realized. Effect.
Owner:WEIDALI IND CHIBI CO LTD
Deposition furnace for the preparation of quartz glass ingots
ActiveCN105036520BImprove structural uniformityReduce temperature gradientGlass furnace apparatusRotational axisCrucible
The invention discloses a deposition furnace for preparing quartz glass ingots, which comprises: a furnace body, the furnace body is composed of a furnace top, a furnace wall and a furnace bottom, and the furnace top, furnace walls and furnace bottom form a furnace; a burner , arranged on the top of the furnace; the base rod extends vertically from the bottom of the furnace into the furnace, the base rod can move in the vertical direction relative to the furnace body, and the base rod can rotate with its axis as a rotation axis; The deposition base is arranged on the top of the base rod and is fixedly connected with the base rod. The diameter of the deposition base is larger than the diameter of the base rod. The deposition base provides a basis for the deposition of quartz glass ingots; the auxiliary heating device is in the furnace It is arranged around the periphery of the deposition base and is used to increase the edge temperature of the quartz glass deposition mound. The invention reduces the temperature gradient of the deposition surface, improves the consistency of the component distribution of the quartz glass ingot, and produces the quartz glass ingot with uniform radial and axial structures.
Owner:CHINA BUILDING MATERIALS ACAD
Filter screen, preparation method of filter screen and filter device using the filter screen
ActiveCN112933739BLarge specific surface areaHigh porosityCombination devicesDispersed particle filtrationPolymer scienceNanofiber
The invention relates to a filter screen, a preparation method of the filter screen and a filter device using the filter screen, wherein the filter screen includes a collection base cloth and a nanofiber layer using the collection base cloth as a base, and the nanofiber layer is obtained by electrospinning Positively charged nanofibrous structures prepared by the silk method. The filter screen of the present invention adopts a nanofiber structure, has the advantages of high specific surface area and high porosity, and can significantly enhance the interception effect on tiny particles.
Owner:NINGBO FOTILE KITCHEN WARE CO LTD
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