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Multi-Layer Metallic Structure and Composite-to-Metal Joint Methods
ActiveUS20130075526A1Reduce eliminate possibilityReduce occurrence and propagationFuselage framesExtrusion containersFiberMetal sheet
A composite structure comprises stacked sets of laminated fiber reinforced resin plies and metal sheets. Edges of the resin plies and metal sheets are interleaved to form a composite-to-metal joint connecting the resin plies with the metal sheets.
Owner:THE BOEING CO
Multi-layer metallic structure and composite-to-metal joint methods
ActiveUS8993084B2Reduce eliminate possibilityReduce occurrence and propagationFuselage framesLaminationFiberMetal sheet
A composite structure comprises stacked sets of laminated fiber reinforced resin plies and metal sheets. Edges of the resin plies and metal sheets are interleaved to form a composite-to-metal joint connecting the resin plies with the metal sheets.
Owner:THE BOEING CO
Coating for inner wall of oil field pipeline and preparation method thereof
ActiveCN101948648AKey lengthImprove mechanical propertiesAnti-corrosive paintsEpoxy resin coatingsVinyl etherToluene diisocyanate
The invention relates to a coating for the inner wall of an oil field pipeline and a preparation method thereof. A component A of the coating consists of the following components in part by weight: 15 to 50 parts of trifluoroethylene-vinyl ether fluoro-resin, 8 to 30 parts of lubricating filler, 1 to 3 parts of dispersing auxiliary agent, 10 to 20 parts of solvent, 15 to 45 parts of colour paste and 1 to 6 parts of lubricating auxiliary agent, wherein the colour paste consists of the following components in part by weight: 40 to 80 parts of film forming resin, 1 to 3 parts of dispersing auxiliary agent, 10 to 40 parts of solvent and 2 to 40 parts of pigment; and the film forming resin is three kinds of biphenol A epoxy resins, namely biphenol A epoxy resinE-20, biphenol A epoxy resin E-12 and biphenol A epoxy resin E-06, or is trifluorochloroethylene-vinyl ether fluoro-resin. A component B of the coating is a curing agent aromatic toluene diisocyanate addition product. Before construction, the component A and the component B are mixed according to a weight ratio of 10 to 1. The coating of the invention is used for coating the inner wall of the oil field pipeline, is corrosion resistant, makes the inner wall of the pipeline have hydrophobic performance and fulfils the aim of reducing resistance and enhancing effect.
Owner:CHINA NAT OFFSHORE OIL CORP +2
Preparation method of WC-Co-cBN composite material
The invention belongs to the technical field of material preparation and in particular relates to a preparation method of a WC-Co-cBN composite material. The preparation method of the WC-Co-cBN composite material comprises the following steps: firstly weighing WC, metal Co powder and cBN raw material in proportion, uniformly mixing, mixing by carrying out ball milling, drying the mixed raw materials in a drying oven at the temperature of 50-200 DEG C, then sieving with a sieve of 100-300 meshes, putting the dried raw materials into a mould, then placing the mould into a hot-pressing sintering furnace, heating the sintering furnace to 1200-1400 DEG C at a speed of 30-50 DEG C / min, insulating for 5-30 minutes, and maintaining pressure to be 20-50MPa, so that the WC-Co-cBN composite material is obtained. The preparation method of the WC-Co-cBN composite material has the advantages that the hot-pressing method is adopted, the sintering temperature is low, sintering time is short, and no phase transformation of cBN can be guaranteed while the WC-Co-cBN composite material has high shrinkage percentage and high volume density; meanwhile, hot pressing energy consumption is low, cost is low, operation is easy, and safety coefficient is high.
Owner:NORTHEASTERN UNIV
Oil-proof packaging paper
InactiveCN108589419ALower surfaceReduce air permeabilityFlexible coversWrappersPlasticizerPaper production
The invention discloses an oil-proof packaging paper and belongs to the field of paper products. The oil-proof packaging paper is prepared by mixing paper pulp, surfactant and complex oil-proof components at a speed of 400-500 r / min for 40-60 minutes and then standing to obtain a mixed solution, mixing coalescing agent, plasticizer and compound additives into the mixed solution to obtain a pulp solution, melt-extruding the pulp solution at 150-200 and then cooling down to obtain a packaging paper base, and then feeding the packaging paper base into a packaging paper production line. The oil-proof packaging paper solves the problems that existing oil-proof packaging paper are non-significant in oil-proof effects and prone to producing toxic substance when applied to high-temperature food.
Owner:周晓东
Silicone rubber material with high corrosion resistance and preparation method thereof
The invention discloses a silicone rubber material with high corrosion resistance and a preparation method thereof, belonging to the field of rubber materials. According to the invention, modified silicone rubber and a thermoplastic polyurethane elastomer are added into an open mill for open milling; then a hydrolysis inhibitor and white carbon black are sequentially added for mixing and blanking; a rubber material is placed at room temperature, and then secondary mixing is performed; and the mixed rubber material is placed in a vulcanizing machine to complete vulcanization so as to obtain the high-corrosion-resistance silicone rubber material. According to the preparation method, the hydrophobic property and the stability of silicone rubber are improved by preparing the modified silicone rubber, and the hydrolysis inhibitor is prepared and is subjected to a ring-opening addition reaction with carboxyl groups, hydroxyl groups, amino groups and the like containing protons generated in the hydrolysis process of thermoplastic polyurethane elastomer, so the hydrolysis of the thermoplastic polyurethane elastomer is inhibited; and under the synergistic effect of the modified silicone rubber and the hydrolysis inhibitor, the silicone rubber-polyurethane composite material has excellent mechanical properties and excellent corrosion resistance.
Owner:SHENZHEN TAIKE TECH
Water-soluble fluorine-containing modified N-NVP polymer and preparation method thereof
The invention relates to a water-soluble fluorine-containing modified N-NVP polymer and a preparation method thereof. The preparation method comprises the step: N-NVP and DFMA are subjected to a polymeric reaction to obtain the compound shown as the formula (I). According to the invention, as a fluorine-containing hydrophobic alkyl side chain is introduced to the water-soluble N-NVP polymer, the N-NVP polymer has the advantages of excellent hydrophobic association property, high surface activity, and excellent salt, temperature and shear resistant properties, can serve as a macromolecular surfactant, and meanwhile has a high utilization potentiality in the fields of oil exploitation, paints, medicines, daily chemicals and the like.
Owner:SHANDONG UNIV
Asymmetric dual-core cyclometalated platinum (II) complex with D-A-A configuration pi conjugated system and application thereof
InactiveCN106008608AImprove the coupling effectKey lengthSolid-state devicesSemiconductor/solid-state device manufacturingDual coreTriplet state
The invention discloses an asymmetric dual-core cyclometalated platinum (II) complex with a D-A-A configuration pi conjugated system and an application thereof. In the metalated platinum (II) complex, pyrene(triphenylamine and the like)-pyridine-pyridine (D-A-A configuration) is used as a main ligand, 2,2,6,6-tetramethyl-3,5-heptadione is used as an auxiliary ligand, a dual-core coordination mode is adopted, and the middle A unit provides two coordination points; the metalated platinum (II) complex improves the external quantum efficiency by the means of enhancing the molecular rigid structure and molecular spin-orbit coupling effect, providing more triplet-state energy levels and improving the external quantum efficiency and the like, and has obvious advantages when used as a near-infrared organic electroluminescent materials; and the prepared near-infrared organic electroluminescent devices show remarkable photoelectric conversion efficiency.
Owner:XIANGTAN UNIV
Preparation method of dielectric film with ultrahigh dielectric constant
ActiveCN111430228AKey lengthReduce distortionSemiconductor/solid-state device manufacturingChemical vapor deposition coatingDielectricPhysical chemistry
The invention discloses a preparation method of a dielectric film with an ultrahigh dielectric constant. The method comprises the following steps: (1) providing a substrate and cleaning the substrateto serve as a substrate for depositing the dielectric film; (2) preparing an HfXO thin film on the substrate by adopting a plasma enhanced atomic layer deposition method, wherein X is Si, Ge, P, Al orTi, and the number of atoms of X doped in HfXO accounts for 5-15%; and (3) carrying out high-temperature rapid annealing treatment on the HfXO film. By forming a crystalline phase structure with an ultrahigh dielectric constant, the preparation of the dielectric film with the ultrahigh dielectric constant is realized. According to the preparation method, the dielectric film with low equivalent gate-oxide thickness, ultrahigh dielectric constant, wide energy gap and high reliability can be prepared, and a feasible path is provided for selection of gate-oxide media in a semiconductor process technology which is rapidly developed along with the Moore law at present.
Owner:SHANGHAI NORMAL UNIVERSITY
Corrosion-resistant weather-resistant high-storage-performance polyester resin for powder coating
ActiveCN112961334AKey can be strongGood corrosion resistanceGeneral water supply conservationAnti-corrosive paintsComposite materialWeather resistance
The invention relates to the technical field of powder coatings, in particular to polyester resin for a powder coating with corrosion resistance, weather resistance and high storage performance, the powder coating and a coating. The polyester resin is prepared from, by weight, 90-125 parts of terephthalic acid, 22-30 parts of fluorine-containing dicarboxylic acid, 46-60 parts of isophthalic acid, 50-70 parts of neopentyl glycol, 10-14 parts of ethylene glycol, 18-24 parts of fluorine-containing dihydric alcohol; through reasonable matching of the components, the glass transition temperature of the polyester resin is improved, and the polyester resin has excellent corrosion resistance and weather resistance.
Owner:SHANDONG SHANGHE POWER TECH
Preparation method of low-temperature-resistant anti-freezing agent for fruit trees
InactiveCN109329279AHigh activityImprove durabilityBiocidePlant growth regulatorsEffective actionVacuum drying
The invention provides a preparation method of a low-temperature-resistant anti-freezing agent for fruit trees and belongs to the field of plant anti-freezing agents. The anti-freezing agent is obtained by adding an aqueous solution to an oil solution and then performing emulsification under the action of an external magnetic field. The aqueous solution comprises a polysaccharide immobilized Fe3O4magnetic fluid, and a preparation method of the Fe3O4 magnetic fluid comprises the steps as follows: mixing a sodium hydroxide solution and a surfactant, introducing N2 for protection, increasing thetemperature to 45-60 DEG C, slowly adding a mixed salt solution of ferric chloride and ferrous sulfate and stirring the mixture for a reaction; washing an obtained product with deionized water to beneutral, performing centrifugal sedimentation, vacuum drying and grinding, and storing the anti-freezing agent for later use. The anti-freezing agent is safe, environmentally friendly, long in life and long in effective acting time, has remarkable benefits for cold resistance and freezing prevention of fruit trees and can promote growth of fruit trees and enhance immunity of fruit trees.
Owner:尹启龙
Rubber sealing element with good anti-aging performance
InactiveCN107522919AHigh tensile strengthHigh tear strengthOther chemical processesCross-linkPolymer science
The invention discloses a rubber seal with good aging resistance, relates to the technical field of rubber seals, and is made of the following components: rubber base material, silicone oil, filler, crosslinking agent, lubricant, vulcanizing agent and plasticizer , carbon black, functional auxiliary agent; the functional auxiliary agent prepared by the present invention not only has a certain vulcanization accelerator function to the rubber seal system, but also can absorb the small molecule by-products generated in the vulcanization process of styrene-butadiene rubber. Its own specific functional groups participate in the anti-aging effect of styrene-butadiene rubber, which can improve the cross-linked structure of styrene-butadiene rubber to a greater extent and improve its mechanical properties; at the same time, it can improve the tensile strength and tear strength of rubber seals to a certain extent .
Owner:宁国市润丰金属制品有限公司
Preparation method of nickel cobalt lithium manganate ternary positive electrode material
The invention discloses a preparation method of a nickel cobalt lithium manganate ternary positive electrode material, which comprises the following steps: preparing an aluminum-containing nickel cobalt manganese precursor, adding a compound of an element W and a compound of an element Ir, and sintering to obtain the nickel cobalt manganese positive electrode material containing aluminum, tungsten and iridium. By doping Al in the precursor synthesis process and doping W and Ir in the sintering process, the three doping elements are uniformly distributed in the material, the synergistic effect of the three doping elements enables positive electrode material particles to have higher hardness, and the higher particle hardness not only improves the compaction density of a positive electrode piece, but also improves the conductivity of the positive electrode piece. And the formation of microcracks in the particles in the circulation process can be effectively inhibited, so that the circulation performance of the material is improved. In addition, the process is simple, the production process is easy to control, and the method is suitable for large-scale production.
Owner:WANHUA CHEM (SICHUAN) CO LTD +1
Anticorrosive acid and alkali resistant acrylic coating and preparation method thereof
InactiveCN113402941AHigh electronegativityGood chemical stabilityAnti-corrosive paintsEpoxy resin coatingsEpoxyPolymer science
The invention discloses an anticorrosive acid and alkali resistant acrylic coating and a preparation method thereof. The acrylic coating is prepared from the following raw materials in parts by mass: 70 to 80 parts of butanol, 50 to 60 parts of butyl acetate, 20 to 30 parts of butyl acrylate, 20 to 30 parts of acrylic acid, 20 to 30 parts of hydroxyethyl acrylate, 20 to 30 parts of methyl methacrylate, 0.1 to 0.3 part of azodiisobutyronitrile, 0 to 14 parts of hexafluorobutyl methacrylate, 10 to 12 parts of epoxy resin, 10-12 parts by mass of a cross-linking agent and 0.1-0.4 part by mass of a catalyst. The acrylic coating is excellent in corrosion resistance, acid resistance and alkali resistance, simple and convenient in process, non-toxic and harmless, and excellent in economic value.
Owner:武汉海翎化学工业有限公司
Paint for pier and bridge decoration and protection and preparation method thereof
InactiveCN111004573AEnhance chemical affinityHigh bond energyAntifouling/underwater paintsPaints with biocidesCellulosePolymer science
The invention relates to a paint for pier and bridge decoration and protection. The paint comprises the following components in parts by weight: 15-30 parts of a water-based fluorine-containing acrylate resin; 26 to 30 parts of K2 silicon resin emulsion; 5-10 parts of an NSR 801 paint film reinforcing agent; 1-2 parts of MK888 potassium methyl silicate aqueous solution; 0.10 to 0.15 part of a polyphosphate; 10 to 15 parts of a material powder; 0.20 to 0.30 part of HEC cellulose; 1.7 to 3.1 parts of an auxiliary materials; and the balance water. The invention further discloses a preparation method of the paint for pier and bridge decoration and protection. The paint has the beneficial effects of good corrosion resistance, water resistance, scouring resistance, good thermal stability and excellent anti-fouling capability.
Owner:NIPPONPAINT SICHUAN CO LTD
Integrated slurry pump and manufacturing mold thereof
PendingCN114087203AGood sealing performanceImprove sealing performanceSpecific fluid pumpsPump componentsPhysicsCarbide silicon
The invention relates to the technical field of slurry pumps, and discloses an integrated slurry pump and a manufacturing mold thereof. The integrated slurry pump comprises a volute and a pump shell, the pump shell is integrally formed and comprises a pump body, the diameter of one side of the pump body shrinks in the axis direction to form a suction inlet, and a connecting opening is formed in the other side of the pump body; and the volute can be embedded into the pump shell through the connecting opening, a sealed cavity is formed between the volute and the pump shell, and the sealed cavity is filled with a resin silicon carbide sand layer. The slurry pump has the following advantages and effects that the pump shell is integrally formed, splicing of two pump shells is not needed, the sealing performance is good, the volute can be embedded into the pump shell from the connecting opening in the pump shell, then the gap between the pump shell and the volute is filled with the resin silicon carbide sand layer, the volute and the pump shell are bonded, and the integrated slurry pump can be obtained.
Owner:HANJIANG HONGYUAN XIANGYANG SILICON CARBIDE SPECIAL CERAMICS
Preparation method of self-cleaning fabrics
PendingCN111733464AHigh reactivityGuaranteed cleanlinessHeating/cooling textile fabricsElectro-spinningFiberSpinning
The invention relates to a preparation method of self-cleaning fabrics, and belongs to the technical field of textile materials. According to the preparation method, titanium is used as a target material, a titanium dioxide film is sputtered on the surface of the base fabric as a substrate, polyvinylidene fluoride is used as a raw material, a nanofiber membrane is prepared by electrostatic spinning, and the nanofiber membrane is compounded on the surface of the substrate through hot pressing, so that the self-cleaning fabrics are prepared. According to a magnetron sputtering method, nano TiO2particles are deposited on the surfaces of the fabrics by utilizing an electromagnetic technique in a vacuum environment so as to form a nano TiO2 film, and the photocatalytic self-cleaning performance is given to the fabrics; anatase types generally react with H2O or OH- ions adsorbed to the surfaces so as to form hydroxyl radical with a strong oxidizing property; and electrons react with oxygenmolecules adsorbed to the surfaces, the oxygen molecules can participate in the reduction reaction and are used as the other source of surface hydroxyl groups, and all kinds of organic matter can be oxidized into micromolecules such as CO2 and H2O, so that the purpose of keeping the materials clean is achieved.
Owner:廖褚华
Ag-C co-doped TiO2-perchloric acid pyranium salt photocatalyst and preparation method thereof
PendingCN110773239AIncrease polarityHigh catalytic activityOrganic-compounds/hydrides/coordination-complexes catalystsBond energyPtru catalyst
The invention relates to the technical field of chemical reaction photocatalysts, and discloses an Ag-C co-doped TiO2-perchloric acid pyranium salt photocatalyst and a preparation method thereof. TheAg-C co-doped TiO2-perchloric acid pyranium salt photocatalyst is prepared from the following formula materials: a benzaldehyde compound, a phenylacetaldehyde compound, phosphorus oxychloride and Ag-Cco-doped TiO2. According to the Ag-C co-doped TiO2-perchloric acid pyranium salt photocatalyst and the preparation method thereof, when perchloric acid pyranium salt absorbs solar energy, electrons can be absorbed to form an excited state, and high oxidation performance is achieved; C atoms replace O atoms in an interstitial void of TiO2 in the calcination process, a Ti-C bond and C-O bond with higher bond energy and shorter bond length can be formed, the growth of TiO2 grains can be inhibited to a certain extent, the TiO2 is enabled to have a larger specific surface area and active site, Ag+easily captures the electrons in a reaction system, and the negative charge generated is used in the reduction quenching process of the -perchloric acid pyranium salt biological catalysis process, the excited state of the perchloric acid pyranium salt can absorb the charge and reduce to a ground state, and the catalyst cycle process is achieved.
Owner:罗金标
Printing plate protective coating and preparation method thereof
ActiveCN113416459AGood weather resistanceGood light fastnessAnti-corrosive paintsAcrylic resinSide chain
The invention discloses a printing plate protective coating and a preparation method thereof, belongs to the technical field of printing, and solves the problem that a printing plate in the prior art does not have good comprehensive performance. The protective coating is prepared from the following raw materials in parts by weight: 100-115 parts of modified acrylic resin, 7.5-8.2 parts of modified nano silicon dioxide, 1.2-1.5 parts of a dispersing agent, 0.8-1.1 parts of a defoaming agent, 1.3-1.7 parts of a flatting agent and 0.4-0.7 part of an adhesion promoter. The raw materials are stirred, subjected to vacuum bubble removal and ultrasonic dispersion to prepare a composite coating, then the composite coating is coated on the surface of a printing plate, and the the composite coating is dryed to obtain a protective coating. According to the prepared modified acrylic resin, a main chain is separated from the outside by fluorine atoms of a side chain, direct action with the outside is avoided, the corrosion resistance and solvent resistance of the resin are improved, the nano silicon dioxide is modified by the silane coupling agent, the compatibility is improved, the nano silicon dioxide is uniformly distributed in a coating, and the hardness and wear resistance of the coating are improved.
Owner:安徽强邦新材料股份有限公司
Stain-resistant and easy-to-clean yarn and production process thereof
PendingCN113481729AImprove wrinkle resistanceImprove pillingStain/soil resistant fibresLiquid repellent fibresFiberPolymer science
The invention discloses a stain-resistant and easy-to-clean yarn and a production process thereof, and relates to the technical field of textile yarns. An emulsifier and deionized water are used for shearing at a high speed, then glycidyl methacrylate, hydroxyethyl methacrylate, an anti-wrinkle monomer and a stain-resistant monomer are added for continuous shearing, emulsifying is performed to form a pre-emulsion, and an initiator is added into the pre-emulsion, so that the glycidyl methacrylate, the hydroxyethyl methacrylate, the anti-wrinkle monomer and the stain-resistant monomer are polymerized to form a polymer; after the polymer treats yarn, isocyanate is cross-linked with hydroxyl and amino on fiber to form a network-shaped polymer, so that the wrinkle resistance and the fuzzing and pilling performance of the yarn are improved, and the situation that dust is accumulated and difficultly cleaned is avoided; and a modifier is endowed with excellent hydrophobic and waterproof performance through a large number of existing C-F bonds, so that the yarn is prevented from being polluted by stains such as water, oil and dust, and the stain-resistant and self-cleaning effects of the yarn are greatly improved.
Owner:JIESHOU HUAYU TEXTILE
Mid-infrared anti-radiation Er, Re: LuYSGG laser crystal and preparation method and application thereof
PendingCN113265705AShort lifeImprove mechanical propertiesPolycrystalline material growthBy pulling from meltRare earth ionsPhysical chemistry
The invention belongs to the technical field of functional crystal materials, and particularly relates to a mid-infrared anti-radiation Er, Re: LuYSGG laser crystal and a preparation method and application thereof. The chemical formula of the laser crystal is Er3xRe3yLu3zY3 (1-x-y-z) Sc2Ga3O12, Re < 3 + > is a rare earth ion different from Er < 3 + >, Lu < 3 + >, Y < 3 + >, Sc < 3 + > and Ga < 3 + >, Er < 3 + >, Re < 3 + > and Lu < 3 + > all replace Y < 3 + > at the central position of a dodecahedron, partial substitution of Lu < 3 + > can improve the radiation resistance of the crystal, and a LuYSGG crystal grown by adopting a melt method is used as a laser host material of an active ion Er < 3 + > and can provide a proper crystal field for Er < 3 + >; the co-doped Re < 3 + > can realize a de-activation effect on an active ion Er < 3 + > so that the service life of a lower laser energy level 4I13 / 2 of the Er < 3 + > is effectively reduced, meanwhile, the service life of an upper laser energy level 4I11 / 2 is not obviously changed, thereby being beneficial to reducing a laser threshold value and improving laser efficiency.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
A kind of preparation method of wc-co-cbn composite material
The invention belongs to the field of material preparation technology, and particularly relates to a method for preparing WC-Co-cBN composite materials. In the present invention, WC, metallic Co powder and cBN raw materials are first weighed in proportion and mixed evenly, and the ball mill is used for mixing. After the ball-milled mixed raw materials are dried in an oven at 50~200°C, they are then sieved through 100~300 mesh. After processing, put the dried raw materials into the mold and place them in a hot-pressing sintering furnace. The sintering furnace heats up to 1200~1400℃ at a speed of 30~50℃ / min and keeps it warm for 5~30 minutes. The pressure is maintained at 20 ~50MPa, WC-Co-cBN composite material was obtained. The present invention adopts the hot-pressing sintering method, with low sintering temperature and short sintering time, which can ensure that the cBN does not phase change, and can also make the material have a large shrinkage rate and high volume density, and the hot-pressing sintering energy consumption is small and the cost is low. Low, easy to operate, high safety factor.
Owner:NORTHEASTERN UNIV LIAONING
A high temperature resistant blended yarn and its production process
The invention discloses a high-temperature-resistant blended yarn, which belongs to the technical field of textile yarns, and aims to provide a high-temperature-resistant blended yarn with excellent anti-oil performance and easy to popularize. The present invention includes an outer layer and a core layer, the outer layer is coated on the core layer, the outer layer includes a flame-retardant layer, an oil-proof layer and a skin layer polymer arranged from the inside to the outside, and the core layer includes a main core wire and a The temperature-regulating viscose fiber is a temperature-adjusting viscose fiber whose main cores are intertwined with each other. The main cores are formed by blending polyimide fibers and polyether ketone. The invention has the advantages of excellent high temperature resistance and oil stain resistance, suitable for manufacturing oil stain resistant carpets for restaurants, practical and effective, and strong popularization.
Owner:四川恒创特种纤维有限公司
A medium dielectric constant high q microwave dielectric ceramic material and preparation method thereof
ActiveCN112979314BEffective regulation of microwave dielectric propertiesResonant frequency temperature coefficient does not drop significantlyMicrowaveDielectric resonator
The invention discloses a medium dielectric constant high-Q microwave dielectric ceramic material and a preparation method thereof, which belong to the technical field of electronic functional materials and devices. Described ceramic material is made of BaO, SrO, La 2 o 3 、TiO 2 and Al 2 o 3 Composition, its weight percentage is: 0.1% ~ 3.0% BaO, 0.1% ~ 8.0% SrO, 59% ~ 74% La 2 o 3 , 21% ~ 30% TiO 2 ,0.1%~7.0%Al 2 o 3 ; The dielectric constant of the ceramic material is 39.2-48.6, the Q×f value is 51600-89900 GHz, and the temperature coefficient of resonance frequency is -0.8-30.3 ppm / °C. Compared with microwave dielectric ceramic materials with similar dielectric constants, the microwave dielectric ceramic materials of the present invention have a higher Q×f value and a near-zero resonant frequency temperature coefficient, and are expected to be used for making dielectric resonators, dielectric filters and High-performance microwave devices such as microwave capacitors.
Owner:TSINGHUA UNIV
A kind of printing plate protective coating and preparation method thereof
ActiveCN113416459BGood weather resistanceGood light fastnessAnti-corrosive paintsPolymer scienceAcrylic resin
The invention discloses a printing plate protective coating and a preparation method thereof, which belongs to the field of printing technology and solves the problem that the printing plate does not have good comprehensive performance in the prior art. The protective coating includes the following raw materials in parts by weight: modified acrylic resin The above-mentioned Stirring of raw materials, vacuum degassing, ultrasonic dispersion to obtain a composite coating, then coating the composite coating on the surface of the printing plate, and drying to obtain a protective coating; the modified acrylic resin prepared by the present invention, the fluorine atom of the side chain will The main chain is separated from the outside world to avoid direct interaction with the outside world and improve the corrosion resistance and solvent resistance of the resin. Nano-silica is modified by a silane coupling agent to improve compatibility and evenly distributed in the coating to improve coating Layer hardness and wear resistance.
Owner:安徽强邦新材料股份有限公司
An asymmetric dinuclear cyclometal platinum(ii) complex with d-a-a configuration π-conjugated system and its application
InactiveCN106008608BImprove the coupling effectKey lengthSolid-state devicesPlatinum organic compoundsQuantum efficiencyMethyl group
Owner:XIANGTAN UNIV
A kind of phosphorus-doped lithium vanadate lithium ion battery negative electrode material and preparation method thereof
ActiveCN110828801BImprove conductivityReduce voltage polarizationCell electrodesSecondary cellsElectrical batteryElectric capacity
The invention relates to the technical field of lithium ion battery negative electrode materials, and discloses a lithium ion battery negative electrode material doped with phosphorus lithium vanadate, which comprises the following formula raw materials: activated porous carbon, Li 3 V 0.85‑0.95 P 0.05‑0.15 o 4 , Adhesive. The anode material of lithium ion battery of this kind of phosphorus-doped lithium vanadate, P-doped Li 3 VO 4 prepared Li 3 V 0.85‑0.95 P 0.05‑0.15 o 4 , which enhances the Li 3 V 0.85‑ 0.95 P 0.05‑0.15 o 4 The conductivity of the battery promotes the diffusion and migration of metal ions and charges between the electrode material and the electrolyte, thereby reducing the voltage polarization during the charging and discharging process of the battery, improving the specific capacitance and electrochemical reversible capacity of the battery, and enhancing the strength of the battery. electrochemical performance, and P-doped Li 3 VO 4 , which reduces the bond length of the Li-O bond, increases the bond energy, and promotes the Li‑O bond 3 V 0.85‑0.95 P 0.05‑0.15 o 4 form a structurally stable cubic octahedral pyramid structure, avoiding the Li 3 V 0.85‑0.95 P 0.05‑0.15 o 4 In the process of lithium intercalation and delithiation, the phenomenon of loss of its crystal structure due to slight strain leads to enhanced rate performance and electrochemical cycle stability of cathode materials.
Owner:安徽鑫辉源储能科技有限公司
High-strength aluminum-plastic composite template and preparation method thereof
InactiveCN114571756ATight shieldingSmall water absorptionFlat articlesBackbone chainFluorine containing
The invention relates to a high-strength aluminum-plastic composite template and a preparation method thereof, and belongs to the technical field of building construction tools. The composite formwork comprises an aluminum angle bead and an aluminum support fixedly connected with the aluminum angle bead, the aluminum angle bead protects the tip of a modified PA plate, slurry leakage caused by knocking damage from the tip when the formwork is assembled and disassembled is avoided, the aluminum support has a bearing effect on the whole modified PA plate, a supporting ring in the middle provides a supporting site, stress is evenly dispersed, the situation that the formwork is pressed against and cracked by a supporting piece is avoided, and the service life of the modified PA plate is prolonged. A modified PA plate is poured on the inner side of the aluminum bracket; the modified PA plate is formed by polymerizing diacid containing benzene rings and diamine, a main chain contains a large number of benzene rings and has high rigidity, fluorine-containing groups are introduced into diacid polymerization monomers through hexafluoroisopropanol, fluorine atoms of side chains are spirally distributed along the main chain after polymerization, the main chain is tightly shielded, water absorption is reduced, and the service life of the modified PA plate is prolonged. The tolerance performance is improved, and the water absorption rate of the modified PA plate is about 0.2% through tests.
Owner:安徽海铭塑业有限公司
Coating for inner wall of oil field pipeline and preparation method thereof
ActiveCN101948648BKey lengthImprove mechanical propertiesAnti-corrosive paintsEpoxy resin coatingsVinyl etherToluene diisocyanate
Owner:CHINA NAT OFFSHORE OIL CORP +2
Polyester resin for corrosion-resistant, weather-resistant and flame-retardant powder coating
ActiveCN113150658AUnique C-F keyStrong bond energyFireproof paintsAnti-corrosive paintsPolymer scienceGlass transition
The invention relates to the technical field of powder coatings, in particular to a polyester resin for a corrosion-resistant, weather-resistant and flame-retardant powder coating, the powder coating and a coating, and the polyester resin is prepared from the following components in parts by weight: 102-138 parts of terephthalic acid, 26-38 parts of fluorine-containing dicarboxylic acid, 79-108 parts of isophthalic acid, 56-78 parts of neopentyl glycol, 20-28 parts of propylene glycol and 22-30 parts of fluorine-containing dihydric alcohol. Through reasonable matching of the components, the flame retardant property of the polyester resin is improved, a relatively good glass transition temperature is kept, and the polyester resin has excellent corrosion resistance and weather resistance.
Owner:SHANDONG SHANGHE POWER TECH
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