108results about How to "Little change in performance" patented technology

The invention provides a super-soft aluminum alloy conductor and a preparation method thereof. The aluminum alloy conductor comprises the following materials in percentage by weight: 0.3 to 1.5 percent of Fe, 0.001 to 0.3 percent of Be, 0.005 to 0.6 percent of Cu, 0.1 to 1.5 percent of rare earth, less than or equal to 0.08 percent of Si, less than or equal to 0.15 percent of total inevitable impurities, and the balance of aluminum. The aluminum alloy is drawn into an aluminum alloy wire by melting, continuous casting and continuous rolling, and the aluminum alloy wire is put into an annealing furnace and annealed for 20 to 40 hours at the temperature of between 380 and 420 DEG C to form the aluminum alloy conductor, wherein the annealing is performed in a sealed heat insulation device under the protection of nitrogen. The aluminum alloy has extremely good toughness and elongation performance, the coefficient of elongation reaches or exceeds 35 percent and even can reach 40 percent, and the electric conductivity can reach 60 percent IACS.

The invention discloses a method for synthesizing low-color high-purity fiber-grade polyphenylene sulfide resin. According to the invention, sodium sulfide and p-dichlorobenzene are adopted as raw materials; N-methyl pyrrolidone, N,N-dimethyl acetamide, and the like are adopted as solvents; under the existence of a basic salt, through a four-step method comprising pre-polymerization, polymerization, chain extension and end-capping, the high-purity low-color fiber-grade polyphenylene sulfide resin is synthesized. By adjusting process parameters, polyphenylene sulfide average molecular weight and distribution index can be effectively controlled. Also, purification process can be simplified, and metal ion embedding can be reduced. Resin slice color is reduced, resin processing stability is improved, and resin performance is improved.

The invention provides a conjugated metal polymer photoelectric material with functionalized polarity side-chain radicals and an application thereof. The material has conjugated main chains and functionalized polarity side-chain radicals, wherein the conjugated main chains contain Hg metal atoms; the functionalized polarity side-chain radicals comprise a high-polarity radical A with water-alcohol solubility. Due to the existence of the metal atoms in the conjugated main chains, the conjugated polymer material has the mutual metal-metal supermolecule function, and has a good current-carrier transferring characteristic; due to the existence of the radical A, the conjugated polymer material can be prepared by using a high-polarity solvent such as alcohol, can remarkably decrease the work function of a stable metal electrode, has good functions of suction filtration, injection and the like on enhanced high work function metal electrode electrons, and is applicable to manufacturing of complex multi-layer organic/polymer photoelectric devices. The conjugated metal polymer with the functionalized polarity side-chain radicals can be used as an electronic suction filtration/transferring layer to be applied to photovoltaic, light-emitting organic/polymer photoelectric devices to improve the properties of the devices.

The invention relates to a method for preparing an alumina carrier. The method comprises the following steps: (I) preparing a mixture including alpha-Al2O3 trihydrate, pseudo-Al2O3 monohydrate and auxiliaries; (II) adding an adhesive into the mixture obtained in the step (I); (III) uniformly kneading the mixture obtained in the step (II), extruding and molding; (IV) drying the product obtained in the step (III), and roasting for the first time to obtain a carrier semi-finished product; (V) soaking the product obtained in the step (IV) with an auxiliary solvent, and drying; (VI) roasting the product obtained in the step (V) for the second time. The invention further relates to the alumina carrier prepared by the method, a silver catalyst prepared by the carrier and application of the silver catalyst. The silver catalyst is used for producing ethylene oxide by ethylene oxidation, and has excellent activity and stability.

An air conditioner for a vehicle uses a hybrid compressor (4) including a first compression mechanism driven by a first drive source (2) and a second compression mechanism driven by a second drive source (5), and a single discharge port connected to the first and the second compression mechanisms. The operation of the hybrid compressor is controlled by a controller (15) in accordance with a control mode. The controller has a first operation mode in which the first compression mechanism alone is driven, a second operation mode in which the second compression mechanism alone is driven, a third operation mode in which the first and the second compression mechanisms are simultaneously driven, and a fourth operation mode in which the first and the second compression mechanisms are simultaneously stopped. Depending upon various conditions, the controller selects, as the control mode, one of the first, the second, the third, and the fourth operation modes.

The invention relates to an ultra-soft temperature-resistant bulletproof optical cable and a production method thereof. The optical cable comprises a cable core, a plastic foaming layer, a bulletproof armored layer and an outer sheath layer, the surface of the cable core is provided with the plastic foaming layer, the outside of the plastic foaming layer is provided with the bulletproof armored layer, the outside of the bulletproof armored layer is provided with the outer sheath layer, the cable core comprises optical fiber units and a central reinforcing element which are twisted in an SZ twisting manner, each optical fiber unit comprises coated optical fibers and a buffer tube, the external parts of the coated optical fibers are wrapped by the buffer tube, the central reinforcing element comprises flexible reinforcing members and a PE sheath layer wrapping the external parts of the flexible reinforcing members, and the outer sheath layer is a bellows sheath. According to the optical cable, good thermal insulation performance is achieved by employing the plastic foaming layer structure, the impact force of the exterior on the optical cable can be effectively buffered, the optical fiber has good flexibility and good bulletproof performance by employing the bulletproof armored layer, the overall bending resistance of the optical fiber can be effectively improved by employing the bellows outer sheath, and the bending recovery toughness can be improved.

Disclosed is a positive photosensitive resin composition which comprises 100 parts by mass of a hydroxy polyamide, 1-30 parts by mass of a phenolic compound having only one benzene ring, and 1-100 parts by mass of a photosensitive diazoquinone compound.

The invention provides organic silicone coated adhesive and a preparation method and application thereof. The organic silicone coated adhesive is prepared from, by weight, 30-50 parts of dimethoxy terminated polydimethylsiloxane, 30-50 parts of triethoxy terminated polydimethylsiloxane, 30-50 parts of polydimethylsiloxane with an epoxy group, 1-6 parts of a cross-linking agent, 0.5-2 parts of a catalyst and 0.1-1 part of tackifier. The organic silicone coated adhesive has excellent comprehensive performance, viscosity is low (500-1000 dpas), the preparation process is free of peak viscosity, the organic silicone coated adhesive is resistant to a high temperature and a low temperature, can be used at the temperature ranging from minus 60 DEG C to 200 DEG C and can be heated and solidified, is high in solidification speed (surface drying time is less than 5 minutes at the temperature of 80 DEG C) and has high stability, and all properties scarcely change after the organic silicone coated adhesive is stored at the room temperature for one year.

The invention relates to a silicon carbide and silicon particle reinforced aluminum-copper based composite material and a preparation method thereof, and belongs to the field of the particle reinforced metal based composite material. The composite material is composed of the components by the weight percentage: 15-25 wt.% of silicon carbide, 45-50 wt.% of silicon and 25-40wt.% of an aluminum-copper alloy; the silicon carbide and silicon particles as a reinforcement phase are uniformly distributed in the aluminum-copper alloy matrix, and the aluminum-copper alloy matrix forms a three-dimensional reticular structure. A powder metallurgy method is used for preparation. The obtained aluminum based composite material has uniform structure, is fully dense, has the comprehensive performance of light weight, low expansion, high modulus, high strength, resistance to space radiation environment, easy processing and the like, is suitable for use in space environments, and can be used as related component materials in the aviation and aerospace fields.

The invention provides a battery consistency detection classification method and device, which belongs to battery detection methods and devices. The detection device comprises an infrared thermal imager and a control cabinet. The infrared thermal imager is placed above the control cabinet. The infrared thermal imager receives infrared reflected by a detected object, converts the infrared into corresponding gray, and acquires the temperature and the thermal image of the object according to the gray value. The control cabinet comprises a control unit and a battery placement unit. The battery placement unit is connected with the control unit through a wire. The control unit comprises an electronic load, a charger, a microcontroller and a multiplexer. The charger and the electronic load have multiple channels. The microcontroller is sequentially connected with the electronic load, the charger and the multiplexer. The multiplexer is sequentially connected with the electronic load and the charger. The detection device has the advantages of simple and feasible application and easy control. Mass heat consistency screening test can be carried out. The possibility of battery pack performance variations caused by heat inconsistency in actual use is reduced. Soaking management of a battery management system is reduced.

A wave absorber of the present invention includes a sequentially laminated structure including an conductor layer (11) made of a conductive material; a first dielectric layer (polycarbonate substrate (12) and bismaleimide-triazine substrate (13)) made of one layer or a multilayer of a dielectric material; and a patterned layer (14) including a plurality of a pattern made of the conductive material, wherein the conductor layer, the first dielectric layer, and the patterned layer are laminated sequentially, and each pattern in the patterned layer (14) is different from other adjacent patterns with respect to at least one of size and shape. Therefore, the wave absorber has sufficient reflection-attenuating capability to prevent communication failure caused by a reflection of a radio wave and so on, can be thin-sized and reduced in weight, and has a wide-band attenuation property.

The invention provides a notched jade ring type circular polarized antenna. The circular polarized antenna comprises an antenna unit and an earth plate, and is characterized in that the antenna unit conducts single feeding through a coaxial feeder; a sector is cut in the surface of the annular antenna unit; the center of the sector and the center of the antenna unit are at a same position; the radius of the sector is equal to the outer diameter of the antenna unit; air dielectric is arranged between the antenna unit and the earth plate. The circular polarized antenna has the advantages that the circular polarized antenna is simple in feeding manner, relatively low in influence of change of feeding point position to aerial performance, and relatively wide in band frequency.

The sealing members (14a, 14b) comprise a film member produced by forming an aluminum or alumina deposition film on at least one side surface of a film-like core material. One side surface outer circumferential rim part of the sealing members is bonded and fixed on the outer end surface of outer rings (9, 9) constituting the rolling bearings (4, 4).

The invention relates to a flame-retardant cable which comprises conductors and insulating layers. The insulating layers are wrapped outside the conductors to form wire cores. The space outside the wire cores and the space between the wire cores are filled with filling layers, and the filling layers and the wire cores are twisted to form a cable core; an inner protective sleeve is arranged outside the cable core in an extruded mode; a first flame-retardant layer, a first armor layer, a second flame-retardant layer, a second armor layer and an outer protective sleeve are sequentially wrapped outside the inner protective sleeve from inside to outside. The flame-retardant cable has the advantages of being reasonable in structural design, good in flame retardance and the like; arrangement is achieved according to an alternate structure, the first flame-retardant layer is protected by the first armor layer, the second flame-retardant layer is protected by the first armor layer and the second armor layer, and therefore the internal structure of the cable can be effectively prevented from damage in the actual transportation and cable erection process, the use performance of the first flame-retardant layer and the second flame-retardant layer is ensured, the flame retardance characteristic of the cable itself can be ensured, and the service life of the cable is prolonged.

The invention relates to the technical field of cables, and discloses a high-flame-retardant petroleum platform cable. The cable comprises a cable body, and is characterized in that the cable body comprises conductors located in the middle, a wrapping layer is connected outside each conductor in a wrapping manner, an insulating layer is coated outside a plurality of conductors, and an outer sheathis coated outside the insulating layer. The high-flame-retardant cable for the oil platform has the advantages that the whole cable is environmentally friendly, high in flame retardance, high in mechanical performance, and resistant to mud, oil and cold.

The invention discloses a plastic scintillator microsphere applicable to the field of nuclear detection, and a preparation method and application thereof. The scintillator resin components comprise a matrix material, a scintillating substance and a wave shifter, the particle size of the plastic scintillator microsphere is smaller than or equal to 1mm, and more specifically, the matrix material of the plastic scintillator microsphere is formed by polymerizing an unsaturated matrix monomer containing an active group, and the matrix monomer is styrene or vinyl toluene. The scintillating substance is 2, 5-diphenyl oxazole, and the wave shifter is 1, 4-bis (5-phenyl oxazole) benzene or-bis-(sigma-methyl styryl) benzene. The microspheres disclosed by the invention have very good physical and chemical stability, and have the advantages of low raw material price, wide raw material source, simple and convenient preparation method and the like. The plastic scintillator provided by the invention can be applied to continuous monitoring of radioactivity of a solution, or can be applied to preparation of a liquid scintillation spectrometer.

Phosphorus-containing thermotropic liquid crystal copolyester is formed by polycondensation synthesis of composite binary chloride and phosphorus-containing phenols monomers in solution by using an acyl chloride method. A main chain of the phosphorus-containing thermotropic liquid crystal copolyester is provided with a mesomorphic unit, and a side chain comprises an antiflaming element phosphorus. The novel aromatic thermotropic liquid crystal copolyester does not only have excellent performance of thermotropic liquid crystals, but also has a certain antiflaming effect simultaneously. The phosphorus-containing thermotropic liquid crystal copolyester can be applied to acrylonitrile butadiene styrene (ABS) resin to prepare ABS-enhanced composite materials of phosphorus-containing thermotropic liquid crystal copolyester. The composite materials have good mechanical properties, thermal stability properties and antiflaming effects.

The invention discloses a millimeter wave flexible circular antenna array, and the antenna array comprises a flexible dielectric substrate; an antenna array is arranged on the flexible dielectric substrate, the antenna array comprises a plurality of antenna units, the antenna units are connected through microstrip lines, the antenna array is symmetrically arranged along the axis of the flexible dielectric substrate, and a metal circular hole is formed in the center of the antenna array. The millimeter wave flexible circular antenna array structure is light in weight and small in size, the bendability of the antenna is improved on the premise of ensuring the performance of the antenna array, and the conformality between the antenna and equipment is good.

The invention discloses a cashew nut based amide surfactant and a preparation method thereof. The cashew nut based amide surfactant is prepared by the following steps: (1) carrying out reaction on cashew nut acid and an acylation agent to obtain (2-hydroxy-5-pentadecyl) benzoyl chloride; (2) carrying out reaction on the (2-hydroxy-5-pentadecyl) benzoyl chloride and ethylene oxide, and introducing an ethylene oxide hydrophilic group on hydroxyl to obtain (2-hydroxy ether-5-pentadecyl) benzoyl chloride; and (3) carrying out reaction on the product obtained in the step (2) and diamine to obtain the cashew nut based amide surfactant. The cashew nut based amide surfactant has the action of well lowering the surface tension of a water phase system, does not have cloud points, is excellent in salt resistance, emulsifying performance and detergency ability and can be widely applied to the industry and daily use chemical fields as a detergent, an emulsifier and the like. The preparation method disclosed by the invention is simple in the process, high in the yield and easy to operate.

The invention discloses a zoom projection lens which is used for a digital light processing (DLP) projector. The zoom projection lens comprises a first lens group arranged on the object side and a second lens group arranged on the image side. The first lens group comprises a first lens, a second lens and a third lens. The second lens group comprises a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens. The ten lenses are sequentially arranged from the object side to the image side and are all spherical lenses made of glass materials. The zoom projection lens is high in imaging quality, low in cost, small in size, small in performance change along with temperature, simple in structure, low in sensitivity and high in mass production.

The invention discloses a curing production process of an ultracrystalline iron core for a current transformer, and relates to the technical field of curing production of the ultracrystalline iron core for the current transformer. The curing production process of the ultracrystalline iron core for the current transformer comprises the following steps of S1, mixing and configuring; S2, processing the ultracrystalline iron core; S3, drying, curing and forming; and S4, carrying out secondary curing. According to the curing production process of the ultracrystalline iron core for the current transformer, a production process is cured, epoxy resin pouring sealant is used as a raw material, the epoxy resin pouring sealant is uniformly stirred after being mixed in proportion, a mixed glue solution is obtained, the ultracrystalline iron core subjected to heat treatment and paint dipping is brushed, the iron core is placed in a constant-temperature drying box to be heated for curing and shaping, and a silicone grease transparent curing agent is used for secondary curing so that the hardness of the iron core is obviously improved, a performance change of a mutual inductor after pouring is reduced, the installation of a protection box is replaced, and the cost is reduced.