894results about How to "Radiation resistant" patented technology

The invention discloses a preparation method of graphene-polyester nano-composite fiber. The preparation method comprises the step of preparing graphene-terylene polyester composite master batch and the step of preparing the graphene-polyester nano-composite fiber from the composite master batch. Compared with other conventional methods, the preparation method has the advantages that the technology is extremely simple, the reinforcing material is excellent in performance and low in cost; besides, excellent mechanical property and functional characteristics of graphene self endow the nano-composite fiber with functionalities like high strength and antistatic property, surface-modified and modified graphene has good dispersity and perfect interfacial compatibility in terylene polyester polymer matrix, which enables graphene to be effectively and uniformly compounded with a terylene polyester chip base material.

The invention relates to a computed tomography (CT) scanning heterogeneous model testing system. The system comprises a CT scanning system, a displacement system, an overburden pressure system, a pressure measurement system, a heterogeneous multilayer core clamp holder and a metering system, wherein the heterogeneous multilayer core clamp holder consists of a shell, a rubber cylinder, a core left plug, a core right plug, a left fixing sleeve, a right fixing sleeve, a left fastening sleeve, a right fastening sleeve and a fixed bracket; the core right plug is provided with a plurality of liquid outlets; each liquid outlet is respectively aligned with one layer of core model; and a strip liquid outlet sealing gasket is formed on the core right plug, which correspond to a seam between two adjacent layers of core models, so that liquid flow passing through each layer of core model flows out from the corresponding liquid outlet of each layer of core model, and thus, intraformational heterogeneous water displacing oil layered measurement is realized. By the CT scanning system, the real-time on-line monitoring of the on-way distribution of saturation of fluid on each layer section in a heterosphere is realized so as to observe the interlayer communication phenomenon.

The invention relates to a Xingyang red black tea processing technique. The technique comprises the following parameters: wilting temperature: 25-30 DEG C; humidity: 60-70%; wilting time: 6-7 h; twisting machine rotating speed: 55-60 r / min; 2-3 times of twisting, each for 30 min; amount of tea feed: 30-35 kg; unravel machine rotating speed: 35 r / min; sieve pore size: 6#; 2-3 times of unravelling;temperature in a fermentation chamber: 2-7 DEG C; humidity in the fermentation chamber: 96%; tea spread thickness: 10 cm; oxygen supply amount: 5 L / min; fermentation time: 4.5 h; initial drying temperature: 115 DEG C; initial drying time: 20 min; re-drying temperature: 75 DEG C; and re-drying time: 30 min. The processing technique of the invention is unique, and the quality of the made black tea is excellent: the appearance of the product is fat and tender and compact, the peak of the tea is gold and the tea has bright luster; the endoplasm aroma of the tea has rich green flavour; the taste of the tea is mellow and sweet; the tea liquor is brilliantly red; and the root of the tea leaf is soft and green, has many sprouts and a colour of brilliant red.

The invention relates to the field of water treatment, specifically to a method for removing metal ions from an aqueous solution by the use of hydrotalcite. The method provided by the invention comprises the step of removing metal ions from an aqueous solution by the use of hydrotalcite. The metal ions, which refer to heavy metal ions or radioactive substance ions, comprise one or more selected from the group consisting of mercury, chromium, lead, arsenic, cadmium, tin, copper and zinc heavy metal ions. The radioactive substance ions comprise uranium, thorium and radium ions. According to the invention, hydrotalcite is applied in metal ions-containing sewage processing, leading to high metal ion removing efficiency and obvious effects. In the meanwhile, raw material sources for the preparation of hydrotalcite are extensive, the cost is low, the preparation method is simple, energy consumption is low and the investment is also low. Therefore, the method provided by the invention has an extensive application prospect.

The invention relates to an inter-curved surface layer extrusion pressure monitoring system based on an array-type ultrathin compliant force sensor, and belongs to the technical field of precise measurement. The system comprises an array-type sensor consisting of an array-type ultrathin compliant force sensing probe and a front end circuit; a reference source; a collection module; a computer comprising an interface card and a data processing unit; and a power supply module. The power supply module is connected with the sensor and the collection module. The reference source is connected with the array-type sensing probe through line multi-route electronic simulation switches. The front end circuit is connected between the array-type sensing probe and the collection module. The interface card is connected with the row and line multi-route electronic simulation switches, respectively. The invention has the characteristics of simple structure, high antijamming capability, high accuracy of measurement, and capability of on-line monitoring of data processing in real time. The invention can monitor the extrusion pressure between face layers on line in real time.

The invention relates to a local discharging on-line detecting and positioning system for an electric transformer, which comprises an ARM processor. The ARM processor is connected with a multi-way signal detecting channel, a LCD (Liquid Crystal Display) screen, a keyboard, a SD (Secure Digital) card seat and a serial port. The multi-way signal detecting channel is formed by an optical fiber ultrasonic sensor sequentially connected with an photoelectric diode, an I / V converter, an amplifier, a filter and a threshold judger. The optical fiber ultrasonic sensor in the multi-way signal detecting channel detects an acoustic transmission signal generated during local discharging, and the acoustic transmission signal is output by the threshold judger after photoelectric conversion, I / V conversion, amplification and filtration. The ARM processor is used for analyzing and processing the multi-way detecting signal, displaying the position of the discharging source on the LCD screen, storing data into the SD card, and sending the data to a host computer through the serial port. The invention has the advantages of simplicity, practicality, strong anti-electromagnetic interference property and stable operation, and can be used for detecting and positioning local discharging of the electric transformer.

The invention relates to a method for making hydrogen-containing silicone oil, in particular to a method for making methyl phenyl hydrogen-containing silicone oil for the encapsulation of LEDs. The method is characterized in that the methyl-phenyl cyclic siloxane (Dn<Me, Ph>), the tetramethyl tetraethyl cyclic tetra-siloxane (D4<Me, Et>) and hydrocyclotetrasiloxane (D4<H>) are taken as monomers; under the protection of N2, right amount of an end capping agent is added into the monomer mixture to be copolymerized under the action of a catalyst, after the polymerization, the catalyst is filtered and recycled, the low molecular compound of the obtained clear solution is removed in decompression and high temperature conditions, the clear solution without low molecular compound is cooled to the room temperature, and the target product is obtained. The method has the advantages of available raw materials, low cost, moderate conditions, simple technique, simple operation, environmental protection and convenient industrialization. The product made by the method can be widely applied to the enterprises which manufacture and use the LEDs, etc.

The invention relates to a high-specific surface area nanometer mesoporous silicon carbide hollow ball and a preparation method thereof. The preparation method comprises dropwisely adding different amounts of silica precursor tetraethoxysilane into water-anhydrous ethanol mixed solutions with different ratios so that the silica precursor tetraethoxysilane is hydrolyzed into silica solid nanospheres with different diameters, dispersing the silica solid nanospheres in distilled water with different volumes, carrying out thermal insulation for a certain time to obtain nanometer mesoporous silicon carbide hollow balls with different diameters are obtained, coating the inner and outer shells of the nanometer mesoporous silicon carbide hollow ball with an organic matter layer so that the organic matter is insert into the shell walls, carrying out carbonization, mixing the reaction product, magnesium powder and a metal salt to obtain a uniform mixture, and carrying out thermal insulation in an inert atmosphere for some hours to obtain nanometer mesoporous silicon carbide hollow balls with uniform structures and adjustable sizes. The preparation method has a low reaction temperature and a low cost. The obtained hollow silicon carbide has the advantages of uniform structure, adjustable sizes, superhigh specific surface area of 648m<2> / g and excellent mesoporous structure.

The invention belongs to the high molecular synthetic material field. The invention relates the double-end phthalonitrile, resin, condensate, which are made by phthalonitrile, and preparing method. The invention uses 4-nitro-o-phthalonitrile and dihydric phenol as reaction integral to get double-end phthalonitrile. The double-end phthalonitrile and diamine are used to react in aromatic amine solution at 140-200Deg.C to get phthalonitrile resin which possesses phthalocyanine ring structure. The resin is cured at 220-280Deg.C, then carried out heat treatment at 320-370Deg.C to get phthalocyanine condensate which possesses high heat stability. The invention has the advantages of good heat stability and fire-retardancy.

The invention discloses a method for preparing an organic substance, in particular to a method for preparing methyl phenyl cyclosiloxane for LED packaging. The method takes methyl phenyl cyclic siloxane (Dn<Me, Ph>, n is equal to 3 and 4) and tetramethyl tetrahydric cyclotetrasiloxane (D4<H>) as monomers; under the protection of N2, an end-capping agent is added into the cyclosiloxane monomer which is subjected to pressure reduction and water removal to copolymerize under the action of a catalyst, then the filtration is performed to recover the catalyst, and the a low molecular compound in clear solution is removed under the condition of pressure reduction and high temperature and then is cooled to room temperature to produce a target product. The method has the advantages of easily-obtained raw materials, low cost, mild conditions, simple process, simple and convenient operation, no pollution, and easiness for industrialization. A product prepared by the method has good effect in the packaging process of LEDs.

The invention discloses a heat-conducting and wave-absorbing rubber material and a preparation method thereof. The heat-conducting and wave-absorbing rubber material is prepared from the following substances in parts by weight: 100 parts of a rubber matrix, 50-600 parts of heat-conducting powder, 50-400 parts of wave-absorbing powder, 0-2 parts of a release agent and 0.5-2 parts of a cross-linking agent. The heat-conducting and wave-absorbing rubber material has the properties of high temperature resistance, low temperature resistance, high voltage resistance, ozone aging resistance, radiation resistance, weather resistance, physiologically inert property, high permeability and solvent resistance, and especially has outstanding high temperature resistance, so that the possibility is provided for preparation of the heat-conducting and wave-absorbing material; the heat-conducting and wave-absorbing rubber material can be directly applied between a heat dissipation room and a metal housing, and heat energy can be effectively exported; and meanwhile, the heat-conducting and wave-absorbing rubber material has electromagnetic shielding and electromagnetic noise wave absorbing properties, so that a good solving scheme is provided for electronic communication products in heat conduction and electromagnetic shielding.

The invention discloses a peroxidated heat-vulcanized silicone rubber resistant to irradiation and a preparation method thereof. The peroxidated heat-vulcanized silicone rubber comprises 100 parts of silicon rubber, 10-60 parts of anti-irradiation agent, 40-70 parts of gaseous white carbon black, 2-7 parts of concentrated crosslinker and 0.5-2.5 parts of vulcanizing agent according to parts by weight. The peroxidated heat-vulcanized silicone rubber resistant to irradiation is prepared from a main material of methyl vinyl silicon rubber by modification; the rubber has strong environmental suitability, and the stretch strength reaches more than 6MPa and the tear strength reaches more than 20KN / m after 500KGy of irradiation; the rubber can be used for producing various rubber products resistant to irradiation such as rubber cushions, sealing parts, buffer elements, distance sleeves, diaphragms, and can be widely applied to the conditions abundant in high-energy irradiation such as aerospace, nuclear industry, electronic communication, chemical industry, medicine and ship; thus, the rubber has very good economic benefit and promotional value.

The invention discloses a blueberry tablet and a preparation method thereof. The main compositions of the blueberry tablet are blueberry powder, carrot powder, medlar powder and chrysanthemum powder, and the weight ratio of each composition is 30-700: 100-300: 100-300: 50-150 according to the former sequence; the blueberry tablet can release asthenopia and has the effect of having relatively good health care function on the damnification of retina and lens of eyes and the cataract caused by that the lens become thick owning to the oxidation of free radical, glaucoma, retinitis, etc. Meanwhile, the blueberry tablet also has the advantages of being convenient for carrying and taking as well as being capable of being quantified for taking according to needs, etc.

The invention discloses a novel anti-allergy repairing composition for skin. The anti-allergy repairing composition comprises the following components by weight percent: 5%-12% of moisturizing agent, 0.1%-3.0% of thickener, 1%-4% of skin repairing agent, 0.1%-1.5% of preservative, and the balance of water. The invention also discloses a preparation method of the skin repairing agent. The anti-allergy repairing composition for skin can be prepared into cream or water aqua, can be directly smeared at the infected part and has no toxicity or harm to human skin. The skin repairing composite component has strong effects of clearing heat and detoxifying, being anti-allergy, repairing skin, diminishing inflammation and astringing; other auxiliary additive components are selected from the moisturizing agent, preservative and thickener and the like which can keep the skin tender and smooth and moisturize the skin and are mild and non-irritant to skin. The anti-allergy repairing composition is convenient to use, achieves the purposes of moisturizing, diminishing inflammation and relieving itching and repairing damaged skin, and is applicable to sensitive skin and skin allergy, pruritus, desquamation, red and swollen skin and couperose skin that are caused by misuse of cosmetics.

The invention relates to a poly(diphenyl-dimethyl siloxane) with terminals sealed by alkyloxy groups, and a preparation method thereof. The preparation method comprises that octaphenylcyclotetrasiloxane and octamethylcyclotetrasiloxane as monomers for a polymerization reaction, low viscosity polydimethylsiloxane with terminals sealed by alkyloxy groups as a terminal sealing agent, and potassium silanolate as a catalyst are adopted; the monomers, the terminal sealing agent, the catalyst and accelerating agents are added into a reaction system; the reaction system is sealed up and then the mixture in the reaction system is stirred and heated to a temperature of 120 to 180 DEG C to undergo a polymerization reaction for 1 to 16 hours; and processes of neutralization, filtering and removal of low molecules on the reaction system are carried out. The preparation method has the advantages of high purity of raw materials, simple process, no need of a mass of organic solvents, and environmentally friendly characters. Products prepared by the preparation method has the advantages of high refractive index and good radiation resistance, high-low temperature resistance and climate resistance, and is especially suitable for base polymers of a dealcoholization type room temperature vulcanized silicone rubber, and surface treatment agents of filling materials such as white carbon black and the like utilized in various silicone rubber and other rubber processing.

The invention relates to a coating method for a wire or an electrical insulator with a teflon coating, which relates to the technical field of transmission lines. The coating method for the electrical insulator (3) comprises the steps of degreasing, sand-blasting treatment, coating, drying and sintering. The coating method for the wire (1) comprises the steps of degreasing, coating adhesives and spraying the coatings. As the teflon has inadhesion property and moisture resistance, the aim of preventing serious icing can be fulfilled by spraying the teflon on the outsides of the wire and the electrical insulator, and the aim of preventing the pollution flashover can be fulfilled by spraying the teflon on the outside of the electrical insulator. As the teflon coating film has excellent heat resistance and low temperature resistance, the wire or electrical insulator sprayed with the teflon can work normally in a high-temperature environment in summer or a low-temperature environment in winter.

The invention relates to a polyphenylene sulfide fiber spinning technology which comprises the steps as follows: (1) pre-processing materials: mixing graphite powder with a silane coupling agent to obtain modified graphite, and mixing the modified graphite and polyphenylene sulfide resin at a high speed so as to obtain a mixture, and finally pre-crystallizing and drying the mixture in a vacuum drying box to obtain dried powder with less than 50 ppm of water; (2) melting and spinning: feeding the dried powder into a double-screw extruder for melting and spinning so as to obtain a melt; (3) slowly cooling and cooling: thermally forming the smelt after forming silk through a spinneret plate, and then transferring to a slow cooling area, and finally transferring to a cooling area to solidify and form; and (4) drafting and finalizing: carrying out oil applying and silk guiding on the solidified and finalized fiber, and then drafting and finalizing at three times so as to obtain the short fiber with the linear density of 11 dte x. The polyphenylene sulfide fiber spinning technology is low in cost and easy in industrial production; and the fiber material prepared via the technology has good performance.

The invention provides a spin microwave oscillator and a spin microwave detector. The spin microwave oscillator of the invention is directly controlled by direct current based on microwave oscillationand output of a spin angle momentum transfer principle, or jointly regulated and controlled by direct current and impressed static magnetic field, has the advantages of miniaturization, high integration, low power consumption, high controllability and tunability and the like. The spin microwave detector of the invention directly detects input microwave by direct voltage generated by the input microwave, and has the advantage of direct measurement on high-frequency signals in no need of hybrid frequency.

The penetration piece comprises the protection cover buried in the tube, the leak detection set, the connecting flange, the cable plug, the conductor assembly and the body of the penetration piece etc. The conductor assembly contains one or more H type conductor unit. Each H type conductor unit comprises the one or more electrical conductor and the connector socket. The agglomeration of glass or pottery and porcelain is used to connect the conductor with the socket. Since the dual seal and insulation of the agglomeration or the solder method are accepted as well as no organic material is used in the penetration piece, the invention possesses the features of higher withstanding voltage, low gas leakage rate, high temperature and radiation resistant.

The invention discloses anti-radiation lithium-aluminum-silicate system low-expansion window glass and belongs to lithium-aluminum-silicate system glass ceramics. The glass is prepared from, by mass, 2.5-8.5% of Li2O, 16.2-26% of Al2O3, 40-71.8% of SiO2, 0.8-4.6% of TiO2, 0.6-3.7% of ZrO2, 1.3-7% of P2O5, 0.7-3.1% of F-, 0.7-3.9% of CeO2, 1.8-6.9% of B2O3, 0.5-3.5% of Na2O, 0.4-3% of K2O, 0.6-4.5% of MgO, 0.2-5.2% of CaO, 0-3.7% of SrO, 0-3% of BaO, 1.9-8.2% of ZnO, 0-1.2% of Cl- and 0-1.3% of SO42+. The invention further provides a machining process of the anti-radiation lithium-aluminum-silicate system low-expansion window glass. The window glass has high transmission, high strength, good in cold-heat impact resistance, small expansion coefficients and anti-radiation stability, can be widely applied in the aerospace field such as a transparent observation window of a spacecraft.

The invention relates to a data acquisition and communication system suitable for a small satellite controller local area network. The system comprises a power management module, a central control unit, a bidirectional bus transceiver, a control area network (CAN) bus controller and a CAN bus transceiver, and further comprises an analog / digital (A / D) acquisition module and an input interface filter circuit, wherein the power management module is used for supplying power to the whole system; the central control unit is used for controlling the bidirectional bus transceiver, the CAN bus controller and the A / D acquisition module; the bidirectional bus transceiver is used for performing chip level conversion; the CAN bus controller supports CAN bus technical regulations; the CAN bus transceiver is directly and electrically connected with a physical bus; the CAN bus controller and the CAN bus transceiver realize data communication through two data transceiving wires; the A / D acquisition module is used for acquiring analog data, converting the analog data into digital data and inputting the digital data to the central control unit; and the input interface filter circuit performs analog filtering. The A / D acquisition module is used for performing satellite analog acquisition to obviously extend a dynamic acquisition range and reduce energy consumption. The system has the advantages of the realization of the satellite digital and analog acquisition and communication, and high extendibility and reliability.

The invention discloses PVC / PE / PVCD solid medicine using composite hard sheet manufacturing technology. It includes the following steps: unreeling for PVC basis material; corona treatment for its surface; coating adhesive; drying; unreeling for PE film; compositing the PVE basis material and PE film; solidifying; dying; corona treatment for the PE film surface; coating adhesive; coating PVCD glue; drying to form PVCD film; repeating coating the PVCD glue on the PE film; drying; rolling, solidifying to form PVCD film again; patting cut and detecting.

The invention relates to the technical field of sheets, in particular to an anti-static two-sided gold-stamped, printed and embossed PVC (polyvinyl chloride) sheet and a preparation method thereof. The sheet comprises raw materials in parts by weight as follows: 80-120 parts of PVC resin, 32-52 parts of a plasticizer, 6-10 parts of a lubricant, 1-4 parts of a heat stabilizer, 0.03-0.07 parts of a slipping agent, 0.03-0.07 parts of pigment powder and 0.1-0.5 parts of calcium powder, wherein the calcium powder is a mixture of nano calcium carbonate and heavy calcium carbonate in the weight ratio of 1:(1.5-2.5), the particle size of the nano calcium carbonate is in a range of 120-150 nm, and the particle size of the heavy calcium carbonate is in a range of 1-10 [mu]m. The raw materials are adopted, and the weight ratio of the raw materials is strictly controlled, so that the sheet is good in anti-static effect, heat-resistant, cold-resistant, acid-resistant, alkali-resistant, heavy-load-resistant, anti-aging, smooth in surface, free of cracks and bubbles, uniform in color, strong in stereoscopic impression, soft in texture, comfortable, healthy and environment-friendly.

The invention discloses an instant collagen lyophilized ball which comprises the following components in percentage by mass: 14-20% of collagen, 10-15% of trehalose, 10-15% of pullulan, 30-56% of mannitol and 10-20% of sterile injection water. The invention further discloses a preparation method of the instant collagen lyophilized ball. The instant collagen lyophilized ball has the repairing function; the prepared collagen lyophilized ball has very strong hydrophilicity, can be quickly and uniformly dissolved in the use moment, and can be used for reparation and maintenance of skin suffered from medical plastic surgeries of laser, photon, refrigeration, high frequency, grinding, face-lifting and the like; the instant collagen lyophilized ball can be used for treating skin damages, caused by acne or trauma, of depressed scars, couperose skin symptom, skin atrophy, sun burn, heat injury and the like. The instant collagen lyophilized ball prepared according to the method has very strong hydrophilicity, can be uniformly dissolved instantly when in use, is more convenient and fast to use and long in guarantee period, can be stored at the room temperature, and is very convenient to store.

The invention relates to a preparation method of a Co3O4 / PANI / MXene / PI electromagnetic shielding fabric. The preparation method comprises the steps: pretreating a PI fabric, and then carrying out plasma treatment; spraying MXene solution to the surface of the treated PI fabric for reaction; spraying Co3O4 / PANI nanowire solution on the obtained MXene / PI composite for reaction; treating the obtainedCo3O4 / PANI / MXene / PI composite in a PDMS (polydimethylsiloxane) solution. The preparation method is simple and has mild conditions, and the obtained electromagnetic shielding fabric has excellent conductivity and electromagnetic shielding performance.

The invention discloses sweet black tea and a preparation method thereof. The black tea comprises the following raw material ingredients in parts by weight: 40-50 parts of black tea and 40-50 parts of sweet tea. The preparation method of the sweet black tea comprises the following steps of: respectively carrying out heating and sterilization on 40-50 parts of the black tea and 40-50 parts of the sweet tea, controlling water contents at 8-10%, respectively crushing the black tea and the sweet tea and enabling the black tea and the sweet tea to pass through a 30-60-mesh sieve, then uniformly mixing, packaging 3-8 g of the mixture in each bag, so as to prepare tea bags. According to the sweet black tea and the preparation method thereof, the black tea and the sweet tea are organically combined, any additive is not added, and the sweet black tea has a good synergistic effect; the sweet black tea has the functions of both the normal black tea and the sweet tea; and the product has the mouth feel of the tea, is suitable for drink by various people, is convenient to carry, is instant to drink after being brewed, meets safe and healthy tea leaf consumption trend and has a good market prospect.

The invention discloses a processing technique of health thorn tea and processing equipment for health thorn tea, which relate to the technical field of processing of agricultural products. The health thorn tea is made of fresh thorn tea leaves. The processing technique includes cutting, primary fixation, primary spreading and cooling, secondary fixation, secondary spreading and cooling, primary rolling, tertiary spreading and cooling, primary baking, secondary rolling, fourth spreading and cooling, secondary baking, grading and packaging. The processed health thorn tea has the advantages of blood glucose lowering, blood lipid lowering, blood pressure lowering, immunity enhancement, heart rate slowing, coronary flow increasing, anticoagulation, antithrombosis, hypoxia tolerance, mononuclear macrophage functional promotion, radio resistance and the like, and is suitable for middle-aged and aged people and people with hyperlipidemia, hypertension and hyperglycemia. The processing technique and the processing equipment for the health thorn tea can also be used for processing common tea and other types of health tea.

The invention discloses a dendrobe beverage the formula of which comprises purified water, dendrobe, xylitol, liquorice and vitamin C in a weigh ratio of 10:1:(0.03-0.06):0.001:(0.02-0.06). The dendrobe beverage with the formula provided by the invention has the effects of promoting the production of body fluid to relieve thirst, promoting gastric acid secretion, assisting digestion, strengthening physical health, preventing and treating the high blood pressure of the old, tonifying kidney, benefiting liver, improving eyesight, treating nyctalopia, reducing heat, easing pain and regulating physiological functions, and has the functions of oxygen deficiency, radiation resistance, aging resistance and neurasthenia resistance, also has the function of improving the immunity of human bodies, has obviously easing, regulating and health protecting functions on coronary heart disease, hypertension and glycosuria, and has the effect of enhancing appetite and improving memory for children.

The invention discloses a preparation method of a polyurethane pervaporation phenol / water separating membrane compounded by inorganic particles, and belongs to the field of pervaporation membrane separation. The polyurethane membrane basic material is obtained by polymerizing and mixing monomer hydroxyl-terminated polybutadiene, toluene diisocynate, 4,4'-diamine diphenylmethane solution, cyclodextrin and silica or carbon fiber powder. The preparation method comprises the following steps: reacting hydroxyl-terminated polybutadiene with toluene diisocynate to obtain blocked prepolymer, then adding 4,4'-diamine diphenylmethane solution and cyclodextrin as chain extenders to perform the chain extension, and adding inorganic modified particle silica or carbon fiber powder (using N,N-dimethylacetamide as solvent) to obtain prepolymer solution of polyurethane; casting the solution on a polyfluortetraethylene plate to form a membrane, solidifying for 1-1.5 hours at room temperature, and moving the membrane to an oven at 80 DEG C to thermally treat to obtain the polyurethane membrane compounded by inorganic particles. The preparation method disclosed by the invention is simple in process, and the prepared membrane has good heat and chemical stability and mechanical property.

The invention relates to an X-band satellite-borne phased-array antenna. The X-band satellite-borne phased-array antenna comprises an antenna cover, an installation plate and a plurality of same antenna units, wherein centers of the plurality of antenna units are arranged on the installation plate in an equilateral triangle lattice mode, the antenna cover covers the plurality of same antenna unitsand is fixed with the installation plate, each antenna unit is a multi-layer microstrip antenna and comprises a radiation patch, an antenna unit shell, an SMA coaxial connector, a grounding plate, abottom-layer dielectric plate, an upper-layer dielectric plate and a parasitic patch, an inner core of the SMA coaxial connector sequentially penetrates through the installation plate, the grounding plate and the bottom-layer dielectric layer and is connected with the radiation patch, an outer skin of the SMA coaxial connector is fixedly connected with the installation plate, the installation plate is connected with the grounding plate, the radiation patch is arranged on the center of the bottom-layer dielectric plate, the parasitic patch is arranged in the center of an upper surface of the upper-layer dielectric plate, an air medium is arranged between the bottom-layer dielectric plate and the upper-layer dielectric plate, and the peripheries of the bottom-layer dielectric plate, the grounding plate and the upper-layer dielectric plate are fixed with the antenna unit shell.