16results about How to "Reduce temperature sensitivity" patented technology

The invention belongs to the technical field of high polymer materials, and particularly relates to a low-viscosity self-adhesion protective film and a preparation method thereof. The protective film comprises an outer contact layer, a support layer and a self-adhesive adhesion layer. The outer contact layer is made of a modified elastomer material; the supporting layer is made of a modified polyolefin material; the self-adhesive layer is a modified acrylate hot-melt pressure-sensitive adhesive and comprises an acrylate monomer, a reversible cross-linking agent, a plasticizer, an initiator, a hindered phenol antioxidant, a hindered amine light stabilizer and a reaction control aid; the acrylate monomers comprise butyl acrylate, isobornyl methacrylate and hydroxyethyl acrylate, the reversible cross-linking agent is bis (2-methallyl) ethyoxyl disulfide, the plasticizer is a polyurethane elastomer, and the hindered phenol antioxidant is an antioxidant 1010; the hindered amine light stabilizer is a light stabilizer 770, the reaction control aid is diethyl hydroxylamine, and the initiator is di-tert-butyl peroxide.

The present application relates to the field of colored asphalt, and specifically discloses a colored emulsified asphalt, a preparation method thereof, and colored micro-surfacing. The colored emulsified asphalt includes the following raw materials: light-colored base asphalt; limestone powder; nano titanium dioxide; SBS modifier; cationic emulsifier; polyphosphoric acid; water for asphalt; inorganic pigment. Its preparation method is: preparing modified base asphalt; preparing an emulsifier aqueous solution mixture; mixing to obtain colored emulsified asphalt. The colored emulsified asphalt of the present application can be used for colored micro-surfacing, and the colored micro-surfacing also includes stone, crushed jujube kernels, polytetrafluoroethylene powder, microfibrillated cellulose, and water for micro-surfacing. The colored emulsified asphalt and colored micro-surfacing of the present application have good resistance to low-temperature cracking, and are suitable for road maintenance in cold areas.

The invention relates to the technical field of martensitic steel, in particular to a 04Cr13Ni5Mo stainless steel plate rolling and temperature control process, which comprises the following steps: heating a pretreated blank to 1190-1210 DEG C at a heating rate of more than 0 DEG C and less than or equal to 5 DEG C / min, and soaking for more than or equal to 2 hours; the rolling reduction rate of the blank is controlled to be 12%-15%, and compared with the reduction rate of the pass before final rolling, the reduction rate is reduced by 20%-25%; stacking slow cooling is larger than or equal to 550 DEG C, and the plate yield is increased by 30% or Through heat treatment processes of normalizing at 1040 DEG C + / -10 DEG C, preserving heat of a plate with the thickness of 85 mm for 4 hours, preserving heat of a plate with the thickness of 115 mm for 5 hours, tempering at 620 DEG C + / -10 DEG C, preserving heat of the plate with the thickness of 85 mm for 6 hours and preserving heat of the plate with the thickness of 115 mm for 8 hours, the yield ratio is stabilized at 0.8-0.85, and the uniformity of mechanical properties is improved by 25%. The stable yield ratio reduces the deformation amplitude of plates and workpieces by more than 40% during later processing, additional repair is not needed, and the production cost is reduced.

The invention discloses a wide-temperature long-wave infrared coaxial four-mirror optical lens for space tiny dark and weak target detection, and solves the problems that an existing optical lens for space tiny dark and weak targets is large in size, high in weight and poor in temperature adaptability. The first reflecting mirror, the second reflecting mirror, the third reflecting mirror and the fourth reflecting mirror are sequentially and coaxially arranged from a light incident end to a light emergent end; the reflecting surfaces of the first reflecting mirror and the second reflecting mirror are oppositely arranged, and the reflecting surfaces of the third reflecting mirror and the fourth reflecting mirror are oppositely arranged; light through holes are formed in the centers of the second reflector, the third reflector and the fourth reflector; the second reflector is used for receiving incident light and reflecting the incident light to the first reflector, and light beams reflected by the first reflector enter the fourth reflector through light through holes in the centers of the second reflector and the third reflector and are reflected to the third reflector for reflection. And the light beams reflected by the third reflector pass through a light through hole in the center of the fourth reflector and then are converged to a photosensitive receiving surface of an external detector.

The invention relates to the technical field of polygonatum sibiricum polysaccharide extraction, in particular to a polygonatum sibiricum homogeneous polysaccharide subcritical water extraction method and application, and the method comprises the following steps: crushing polygonatum sibiricum, adding a degreasing agent for treatment, and filtering; adding an ammonia water-ethanol solution, performing pretreatment, adding cellulase and hemicellulase for dissolving, and performing centrifugal separation to obtain filtrate and rhizoma polygonati residues; carrying out glycerol modified subcritical water extraction on the polygonatum sibiricum residues to obtain extract liquor; mixing the filtrate and the extract liquor, performing alcohol precipitation, centrifugation, freeze drying, dissolving with distilled water, loading a sample to an anionic cellulose chromatographic column, eluting with distilled water, further purifying with a gel chromatographic column, and eluting with a NaCl solution to obtain the polygonatum homogeneous polysaccharide. According to the method, a specific degreasing mode is combined with enzyme dissolution and subcritical water extraction, so that the extraction rate of the polygonatum sibiricum homogeneous polysaccharide is increased, impurities can be reduced, harmful substances are not used in the extraction process, and the prepared polygonatum sibiricum homogeneous polysaccharide is suitable for the fields of high-end health care products and medicines.

The present invention provides a solid medium damper, including a cylinder with a cavity, and a piston arranged in the cylinder cavity, characterized in that the two ends of the piston are provided with left and right guide rods connected thereto, and the left and right guide rods are provided with corresponding left and right plugs through wear-resistant rings, and left and right chambers are formed between the left and right plugs and the corresponding piston ends, and the left and right chambers are filled with solid damping medium, and the left and right chambers are interconnected through the gap between the piston and the cylinder, so that the solid damping medium in the left and right chambers can move relative to each other under stress. It is used to dissipate the energy entering the structure, reduce the structural vibration, and protect the safety of the main structure, while fundamentally solving the problem of silicone oil leakage caused by the prior art of using silicone oil for vibration reduction, which leads to the failure of the damper, improving the stability of the damper, extending the service life, and reducing the sealing requirements.

The invention belongs to the field of new materials, particularly relates to a new material for road construction, and more particularly relates to high-temperature-resistant SBS modified asphalt and a preparation method thereof.The high-temperature-resistant SBS modified asphalt mainly comprises matrix asphalt, an SBS asphalt modifier, a rubber oil ductility enhancer, a stabilizer and the like. The main improvement is that the 325-600-mesh stone powder is added into the modified asphalt, so that the use amount of the SBS asphalt modifier is reduced, the softening point of the modified asphalt is increased, the needle penetration is reduced, and the preparation cost of the modified asphalt is reduced.

The invention relates to a preparation method of a high-strength homogeneous composite steel plate with excellent impact toughness. The method comprises the following steps: (1) forging a smelted martensite cast ingot into a blank with a required size; (2) cutting into equal-thickness steel sheets; (3) a rectangular tube made of plain carbon steel and a steel sheet are welded to form a packaging shell, and the steel sheet is arranged in the packaging shell; (4) forming a vacuum environment in the sealed shell, and welding and sealing; (5) the composite steel plate is heated to 1150-1200 DEG C for rolling, and the composite steel plate is rapidly cooled to the room temperature after rolling; (6) solution treatment is carried out, and then rapid quenching is carried out to obtain a martensite structure; and (7) re-heating for tempering treatment, and then air-cooling to room temperature to obtain the homogeneous composite steel plate. The high-strength homogeneous composite steel plate provided by the invention is simple in preparation process flow, excellent in obdurability matching and low in cost.

The utility model relates to the technical field of road paving, in particular to a self-adhesive high-performance waterproof anti-crack sticker. The utility model relates to a self-adhesive high-performance waterproof anti-cracking paste which sequentially comprises an aluminized isolating membrane, a bonding layer, anti-cracking cloth and a PET (Polyethylene Terephthalate) isolating membrane from bottom to top. Under the condition that the high-tensile anti-cracking polyester glass fiber cloth is compounded with the aluminized isolating membrane and the PET isolating membrane, the quality and efficiency of the anti-cracking paste are improved, and the service life of a road is prolonged. According to the utility model, a double-layer laminating structure is adopted, the bonding layer has good bonding property, can be effectively bonded with the aluminized isolating membrane, and is low in temperature sensitivity, so that the seasonal construction time is prolonged.

The present invention relates to a composition for tissue repair comprising a copolymer of a hydrophilic biocompatible polymer and a hydrophobic biocompatible polymer, which has rapid biodegradability in the body, excellent biocompatibility and collagen regeneration effect, and thus can be used as a composition for tissue repair. And has excellent in-vivo injectable properties, and thus can be used as an injection.

This invention provides a composite microwave dielectric ceramic, its preparation method, and its application, belonging to the field of electronic ceramics technology. The composite microwave dielectric ceramic provided by this invention includes a main material, auxiliary materials, and sintering aids; the main material is Mg2SiO4; the auxiliary materials include composite perovskite ceramics and metal oxides; the composite perovskite ceramic is Ba... 0.5 Sr 0.5 TiO3; the metal in the metal oxide and / or metal carbonate includes one or more of Ba, Zn, Zr, and Mn. The composite microwave dielectric ceramic provided by this invention possesses low dielectric constant εr, low dielectric loss, and a near-zero resonant frequency temperature coefficient τf. Simultaneously satisfying the advantages of low loss DF, low dielectric constant εr, and near-zero resonant frequency temperature coefficient τf, it can meet the requirements of 5G microwave and millimeter-wave band communication products.

The invention discloses a thick-film resistor with high strain sensitivity and low temperature sensitivity and a preparation method thereof, and belongs to the technical field of functional materials, electronic elements and sensors. The preparation problem of the thick-film resistor with high strain sensitivity and low resistance temperature coefficient is solved. The preparation method comprises the following steps: weighing lead oxide, boron oxide and silicon dioxide, uniformly mixing, completely melting into molten glass, carrying out water quenching, and carrying out ball milling on the water-quenched glass slag to obtain lead borosilicate glass powder; weighing RuO powder and lead borosilicate glass powder, adding an organic carrier, mixing, adding into a three-roller grinder, and fully grinding to be fine and uniform, so as to obtain resistance paste; and coating a cleaned substrate with the resistance paste in a silk-screen printing manner, and in an air atmosphere, controlling the sintering peak temperature within the range of 750-950 DEG C and the heat preservation time of the sintering peak temperature within the range of 10-360 minutes to obtain the thick-film resistor with both high strain sensitivity and low temperature sensitivity.

The invention provides a coating and a preparation method thereof, a neodymium-iron-boron base material with a coating and a neodymium-iron-boron magnet. The coating comprises PVB (Polyvinyl Butyral) resin and alloy powder, wherein the tail end of a molecular chain of the PVB resin comprises an amino group and / or an amido group, and side groups of a main chain of the molecular chain of the PVB resin comprise a butyral group, a hydroxyl group and an acetoxyl group; the alloy powder has the following composition: (HRe (1-x) LRex) aT100-a-bMb. Wherein HRe comprises Tb and / or Dy; lRe comprises one or more than two of Nd, Pr, La and Ce; t comprises Fe and / or Co; m comprises one or more than two of Al, Ga, Cu, Zn, Sn, Ni and Si; 0.1 < = x < = 1; by atomic percent, 30 < = a < = 90, and 10 < = b < = 50. According to the coating provided by the invention, the viscosity and thixotropy of the coating can be reduced through the interaction between characteristic functional groups of the PVB resin and between the characteristic functional groups and the alloy powder, wire drawing is not prone to occurring in the silk-screen printing process, products are not prone to being influenced by coating factors to show differences of all batches, and the weight increasing uniformity is good.

This application provides a lens module and an electronic device. The lens module includes an imaging lens group, a light filter, and an image sensor, the imaging lens group includes a plurality of lenses whose optical axes mutually overlap, the plurality of lenses include a liquid lens, a plastic lens, and a functional optical element, the functional optical element is a functional lens and / or a diffractive optical element, and a refractive index temperature coefficient β of the functional lens meets: -9:optical-5≤β≤9×10-5. According to the lens module and the electronic device provided in embodiments of this application, the functional optical element is disposed in the imaging lens group including the liquid lens, so that a temperature effect problem of a lens module including a liquid lens in the conventional technology can be resolved.

The invention provides a crystalline silicon-perovskite composite photovoltaic module and a preparation method thereof. The photovoltaic module comprises a glass front plate, a battery unit, a first adhesive film and a back plate which are sequentially stacked from top to bottom, the battery unit comprises a plurality of transparent conductive layers arranged on the glass positive plate at intervals; the plurality of perovskite cell layers and the plurality of transparent conductive layers are arranged in a one-to-one correspondence manner; a second adhesive film is arranged between any two adjacent perovskite cell layers; the plurality of crystalline silicon cell layers and the plurality of second adhesive films are arranged in a one-to-one correspondence manner, and each crystalline silicon cell layer is arranged on the corresponding second adhesive film; the first wire is connected with the plurality of perovskite cell layers, and two ends of the first wire are located on the outer sides of the plurality of perovskite cell layers to serve as a positive electrode and a negative electrode respectively; and the second wire is connected with the plurality of crystalline silicon cell layers, and two ends of the second wire are located at the outer sides of the plurality of crystalline silicon cell layers to serve as a positive electrode and a negative electrode respectively, so that the problem of low output power of a photovoltaic system in the prior art is solved.

The invention discloses an alloy composite material of a circuit board shielding case and a preparation method and application thereof, and belongs to the technical field of circuit board shielding cases, the alloy composite material of the circuit board shielding case sequentially comprises a first stainless steel layer, a T2 copper layer and a second stainless steel layer; wherein an alloy transition layer is arranged between the first stainless steel layer and the T2 copper layer, and an alloy transition layer is arranged between the second stainless steel layer and the T2 copper layer. The problem of bending deformation possibly caused by high heat conduction rate of a thin plate material is solved; meanwhile, welding challenges caused by melting point differences of all layers of materials are ingeniously avoided, the non-uniform phenomenon in the welding process is remarkably reduced, negative influences of temperature on the material resistivity are remarkably weakened through ingenious addition of silicon nitride, conductivity attenuation caused by temperature rising is effectively restrained, and the welding quality is improved. When the environment temperature rises to 40 DEG C or higher, the adverse effect of the temperature on the conductivity is further weakened, and the temperature sensitivity of the conductivity is effectively reduced.