59results about How to "Performance can be adjusted" patented technology

The invention relates to a high-temperature-resistant radar and infrared compatible stealth coating and a preparation method thereof. The high-temperature-resistant radar and infrared compatible stealth coating is of a layered structure, and sequentially comprises a metal bonding layer, a ceramic wave absorbing layer, a chip resistance type high-temperature periodic structure layer, a ceramic isolation layer and an infrared low-emissivity frequency selective surface layer from inside to outside; and the chip resistance type high-temperature periodic structure layer is a high-temperature resistance coating which is arranged in a periodic characteristic mode, and the infrared low-emissivity frequency selective surface layer is a high-temperature conductor coating which is arranged in a periodic characteristic mode. According to the radar and infrared compatible stealth coating, integration of the radar stealth function and the infrared stealth function is effectively achieved, the coating has both the radar stealth effect and the infrared stealth effect, and the defects that a traditional radar stealth coating cannot be compatible with the infrared stealth function, and the wave absorbing performance is not ideal are overcome; and the preparation method is simple and relatively mature, and is easy for large-scale production and application.

The invention discloses a force-responsive polymer foam particle and a preparation method thereof; under the action of mechanical force, force-sensitive groups and/or force-responsive components in the force-responsive polymer foam particle undergo chemical and/or physical changes, so that the foam particles form force response. In the polymer foam particle, a force-sensitive group/force responsecomponent with a force response characteristic is introduced, so that a force-responsive foam product with a wide controllable range, and a rich structure and various performances can be prepared. Theforce response polymer foam particle can be used for producing foam packaging materials, impact-resistant protective materials, damping materials, buffer materials, silencing materials, thermal insulation materials and the like with a force response function so as to be widely applied.

The invention discloses a phenylboronic acid hydrogel-based sugar-sensitive microneedle pad and a preparation method thereof. The phenylboronic acid hydrogel-based sugar-sensitive microneedle pad comprises a base and a microneedle array which is located on the base, wherein the base and microneedles are mainly prepared from a vinyl phenylboronic acid monomer and a vinyl monomer through free radical copolymerization; microneedle bodies and the base can both be used for embedding insulin drugs; the phenylboronic acid monomer is selected from 3-acrylamidophenylboronic acid, and the vinyl monomeris selected from N-isopropyl acrylamide and N-vinyl pyrrolidone. The preparation method disclosed by the invention is simple; the obtained phenylboronic acid hydrogel-based sugar-sensitive microneedlepad is regular in structure, has good mechanical performance, is capable of effectively piercing the skin, has stimulus responsiveness to glucose concentration, and is capable of regulating the release rate and the dosage of insulin according to blood sugar concentrations and effectively preventing a risk of hypoglycemia caused by excessive release of the insulin.

The invention discloses a spouted bed reactor and an olefin polymerization method thereof. The spouted bed reactor comprises a spouted bed reactor main body, a circulation gas system, and a solid particle conveying device. With the solid particle conveying device, solid particles in the spouted fluidized bed is subjected to external circulation, such that the flowing of solid particles and gas in bed layer and especially annulus areas is promoted, particle mixing in the reactor is enhanced, retention area is eliminated, heat transfer efficiency and mass transfer efficiency are improved, and possibilities of wall adhesion agglomeration is reduced. A material outlet port is arranged on an external circulation pipe, and is connected to a material discharge system, such that material discharge efficiency can be improved. Auxiliary gas flow is delivered to a reaction bottom diameter-reduction section. Production performance can be adjusted by changing the composition of main gas flow and auxiliary gas flow.

The invention discloses an industrial production method for synthesizing a cemented carbide block material in situ, belonging to the technical field of cemented carbide. The industrial production method comprises the steps of: utilizing WO 2.9, Co3O4 and carbon black as raw materials, calculating a dosage ratio of the three raw materials by considering the evaporation capacity and wastage of Co and carbon wastage caused by carrying powder in an oxidizing gas during the preparation process according to the demand of a final Co content, ball grinding the raw materials to mix the same, and calculating the mass of the necessary raw material powder according to the material mass reduction and the sintering wastage coefficient k of the WC and Co powder during the sintering process; and utilizing the low sintering pressure at the primary application stage of a hot press sintering technique, a vacuum sintering technique or a low pressure sintering technique, periodically maintaining the temperature and periodically increasing the pressure to obtain the cemented carbide block material. The industrial production method of the invention has the advantages of simple technique steps, short process, energy saving and environmental friendly properties, and capability of realizing the large scale industrial production of the cemented carbide.

The invention relates to a vibration measurement apparatus based on a laser speckle of a polarized singular-point light beam. With the apparatus, a problem that non-destructive telemetering of vibration information can not be realized in the prior art can be solved. On the basis of the principle of laser speckle excitation by the polarized singular-point light beam and combination with a vector-light field coherent technology, a vector light field coherent technology passes through a light splitter and then irradiates a detected zone; a singular-point light beam laser scattering effect is generated by the detected zone; and a laser speckle passes through an out-of focus optical imaging system to carry out transmission. Another polarized singular-point light beam after light splitting passes through two wave plates; horizontal polarized distribution control is carried out and then reflection is carried out by a reflection element; an overlapped area with a laser speckle light filed exists to form an interference light field; and a photoelectric sensor detects the interference light field information and vibration information is obtained based on information processing. According to the invention, the vibration measurement apparatus has characteristics of non-contact detection, non-destructive detection, remote measurement realization, adjustable performance, high sensitivity and reliability, good anti-interference capability, wide frequency response characteristic, high information quantity, easy system construction, convenient usage, and wide application range and the like.

The invention provides a pressure sensor and a preparation method thereof, the pressure sensor comprises a glass base and a silicon strain diaphragm located on the glass base, one surface of the glass base is provided with a recessed cavity, and the silicon strain diaphragm comprises an insulating medium layer located on the front surface and a silicon substrate covered by the insulating medium layer; and a beam membrane structure of a cross beam structure is arranged at the position, facing the cavity, of the front face of the silicon strain membrane, each end of the beam membrane structure is provided with a set of piezoresistors, a set of heavily-doped contact areas and a pair of metal leads, the piezoresistors are connected with the heavily-doped contact areas in series, and the two ends of the piezoresistors are led out of the heavily-doped contact areas through the metal leads, the metal leads and the heavily doped contact regions form ohmic contact on the front surface of the silicon strain diaphragm, and Wheatstone bridges are formed among the varistors; the beam membrane structure comprises a plurality of groove structures arranged on the cross beam and is used for adjusting the performance of the pressure sensor to adapt to different measuring ranges; and the sensor is higher in linearity, more stable in structure and suitable for different measuring ranges.

The invention relates to an in-situ authigenic aluminum-silicon gradient composite material and a preparing method thereof. According to the in-situ authigenic aluminum-silicon gradient composite material, the silicon content is gradually reduced from the surface to the core part, and the in-situ authigenic aluminum-silicon gradient composite material is formed in a manner that an outer-layer hypereutectic high-silicon organization layer is in gradual transition to an inner eutectic aluminum-silicon organization layer, or the outer-layer hypereutectic high-silicon organization layer is in transition to the eutectic aluminum-silicon organization layer, then the eutectic aluminum-silicon organization layer is in transition to a hypo-eutectic aluminum-silicon organization layer, or the outer-layer hypereutectic high-silicon organization layer is in transition to the eutectic aluminum-silicon organization layer, then the eutectic aluminum-silicon organization layer is in transition to thehypo-eutectic aluminum-silicon organization layer, and finally, a pure aluminum layer is taken as the core part. All organization layers of the material are in smooth transition, and no obvious interface exists. To solve the problem that massive primary silicon and acicular eutectic silicon exist in an aluminum-silicon gradient composite material, firstly, a lanthanum or cerium alterant is added in a pure aluminum liquid, and then the mixed aluminum liquid reacts with silicon dioxide to obtain the aluminum-silicon gradient composite material. In this way, the morphology of primary silicon andeutectic silicon is improved, and finally, round-head short-rod-shaped or round-head grain-shaped primary silicon and eutectic silicon are obtained.

The invention discloses a performance-adjustable high-stability resistive random access memory which comprises a substrate, a bottom electrode, a resistive random access layer and a top electrode in sequence from top to bottom. The memory is characterized by further comprising conductive oxide thin films, the thin films are arranged between the bottom electrode and the resistive random access layer or between the top electrode and the resistive random access layer, or the thin films are arranged between the bottom electrode and the resistive random access layer and between the top electrode and the resistive random access layer, and the adjustment of the activating voltage-resistance ratio of the resistive random access memory is realized by changing the thickness of the conductive oxide thin films and the content of oxygen vacancy. By means of the resistive random access memory, the stability of the resistive random access memory is improved, and the resistive random access performance of the resistive random access memory can be adjusted.

The invention provides a high-frequency high-Bs composite ferrite material. A preparation method of the high-frequency high-Bs composite ferrite material comprises the following steps: 1) respectively preparing pre-sintered materials of manganese-zinc ferrite and nickel-zinc ferrite; 2) respectively sanding and adding auxiliary components; (3) respectively carrying out secondary presintering; (4) manganese-zinc micron-scale magnetic powder and nickel-zinc nano-scale magnetic powder are prepared through sanding and high-energy ball milling respectively; (5) uniformly mixing in a sand mill, and carrying out compression molding; and 6) sintering in an atmosphere furnace. Through the formula design of the main components, the auxiliary components, the fluxing agent and other doping components and the combination of the process design of secondary pre-sintering, sanding, high-energy ball milling, mixing and the like, a crystal grain shell layer structure with the inner layer being MnZnFeO4 and the outer layer being NiZnFeO4 is finally formed, the NiZnFeO4 structure of the outer layer increases the crystal boundary resistivity, the MnZnFeO4 structure of the inner layer also increases the saturation magnetic flux density of crystal grains, and the grain boundary resistivity is improved. And finally, the high-frequency and high-Bs composite ferrite material is prepared.

The present invention discloses a hybrid dynamic polymer, which simultaneously contains a dynamic covalent bond based on a triazolinedione-indole adduct, and a supramolecular hydrogen bond, and further at least contains a cross-linking network, wherein a side hydrogen bond group or a terminal hydrogen bond group participates in the formation of the supramolecular hydrogen bond, and contains the hydrogen bond group being not derived from triazolinedione and indole and the adduct of triazolinedione and indole. According to the present invention, the supramolecular hydrogen bond can make the material have stimulating responsiveness and self-healing property, and the dynamic covalent bond can make the covalently-cross-linked polymer have the structural stability and the mechanical strength under non-catalytic reaction conditions, and further has dynamic reversibility under special reaction conditions, such that the hybrid dynamic polymer has characteristics of self-healing property, recyclability, repeatable processability and the like, and can be widely used in self-healing materials, tough elastomers and other fields through the co-action of the supramolecular hydrogen bond and the dynamic covalent bond.

The invention relates to a high temperature lubricating composite material containing strontium zirconate and a preparation method thereof. The material is characterized by comprising the following components, by mass percentage: 49.28-54.32% of nickel, 12.32-13.58% of chromium, 26.4-29.1% of nanometer yttria-stabilized zirconia, and 3-12% of strontium sulfate. The preparation method comprises the following steps of: mixing the powder of the abovementioned components by adopting a dry process ball-milling technology, performing cold pressing performing on the mixed powder in graphite dies, performing hot pressure sintering on the preformed material in a vacuum hot-pressing sintering furnace, and preparing the high temperature lubricating composite material containing strontium zirconate based on solid-phase reactions. The material disclosed by the invention achieves excellent tribological properties in the temperature range of 800-1000 degrees centigrade; the preparation method is simple, can control the technological parameters in the preparation process easily; the invention can be used for solving the problems of high temperature lubrication of the related moving components of airspace engines, gas engines and petroleum drilling machines.

The invention relates to a variable stiffness self-repairing material containing a metal-sulfydryl coordination bond. The variable stiffness self-repairing material is prepared from a sulfydryl-terminated small molecule compound, sulfydryl-terminated liquid polysulfide resin, a cross-linking agent, zinc salt, other metal salts, an alkaline regulator and a solvent. The structure of the material contains a large number of metal-sulfydryl coordination bonds, and the coordination bonds have good thermodynamic stability, so that the material has higher rigidity and mechanical strength; the good dynamic activity of the coordination bond ensures that the material has good self-repairing performance; due to the high temperature sensitivity of the coordination bond, the variable stiffness of the material in a wide temperature range is ensured; the coordination bond is insensitive to water, so that the environmental use stability of the material is ensured; meanwhile, the material has the characteristics of high transparency and adjustable refractive index. The variable stiffness self-repairing material containing the metal-sulfydryl coordinate bond can be applied to the fields of sealants, self-repairing coatings, temperature-sensitive variable stiffness self-repairing engineering materials, additive manufacturing, composite materials, optical transparent adhesives and the like.

The invention discloses a thin film deposition device adopting a controllable magnetic field for screening laser plasma. The thin film deposition device comprises a laser plasma cavity, a target support and a target material, wherein the target support and the target material are arranged in the laser plasma cavity, the laser plasma cavity is connected with a focusing magnetic field cylinder through a magnetic filtering elbow, the focusing magnetic field cylinder is connected with a thin film deposition cavity, a substrate table and a substrate are arranged in the thin film deposition cavity,and the magnetic filtering elbow comprises an elbow and a conductive coil wound around the elbow. A thin film precipitation method through screening the laser plasma by the controllable magnetic fieldis further disclosed. The device and method is convenient to operate, simple in process, strong in laser plasma controllability and capable of preparing a high-quality nano-film material, and has practical application value.

The invention discloses a flame-retardant plywood, which comprises a base layer, a reinforcing rib layer, and a flame-retardant layer. The reinforcing rib layer is arranged between the base layer and the flame-retardant layer. 2‑3 parts of amine, 0.5‑1 part of phosphoric acid, 2‑3 parts of triethanolamine, 0.5‑1 part of boric acid, 2‑3 parts of borax, 2‑3 parts of ammonia water, 10‑15 parts of silicon carbide, 3 parts of polyurethane film former 10 parts, 5‑10 parts of diethyl phthalate, 20‑35 parts of clay. The environmentally friendly and efficient wood flame retardant produced by this production process has multiple functions such as flame retardancy, smoke suppression, and anticorrosion. etc. The impact is minimal, and the comprehensive performance of the flame retardant is excellent. Moreover, the flame-retardant ecological wood composite board series products produced by this process have the characteristics of excellent physical and mechanical properties, adjustable flame-retardant performance, environmental protection and energy saving in the production process, and obvious production cost advantages.

The invention discloses a preparation method of stretchable hydrogel, the stretchable hydrogel and application. The preparation method of the stretchable hydrogel comprises the following steps of 1, preparing bacterial cellulose dispersion liquid with the mass fraction of 0.1-0.4 wt%; S2, adding ammonium persulfate and dopamine into the diluted bacterial cellulose dispersion liquid obtained in thestep S1, and conducting stirring for 15-60 minutes at room temperature until the mixed liquid becomes brown from white; and S3, continuously adding acrylamide, N,N-methylene bisacrylamide and tetramethylethylenediamine into the system in the step S2 under an ice bath condition, conducting stirring for 5-30 minutes, after the room temperature is recovered, pouring the mixed solution changing frombrown to brownish red into a vessel, putting the vessel into an incubator at 55-65 DEG C for 2-3 hours, or conducting standing at the room temperature for 40-60 hours to obtain the stretchable hydrogel. The stretchable hydrogel has good stretchability and adhesion, and can be used for preparing medical dressings.

The invention belongs to the field of flexible electronics devices, and particularly discloses a preparation method and a product of a shape adaptive fast response soft heater. The method comprises the following steps: (1) spin-coating a polyvinyl alcohol aqueous solution on a hard substrate and heating to cure the hard substrate to form a sacrificial layer; (2) processing the conductive materialinto a conductive layer by screen printing; 3) spin-coating a flexible polymer on the sacrificial layer and heating to cure the flexible polymer; (4) dissolving the sacrificial layer to strip the hardsubstrate; and (6) sticking a copper foil and an insulating layer on the initial soft heater body. The product is prepared by the above method. The soft heater has fast response speed, small requireddriving voltage, large deformation and good shape adaptability and can realize reliable grasping and heating of complex shape objects. Meanwhile, the thermal stability of the soft heater at high temperature is good and the performance of the soft heater can be adjusted by simply controlling the DC voltage of the power supply.