33results about How to "Hysteresis effect is small" patented technology

The invention relates to a preparation method of an RE-Fe-B part hydrogen storage alloy, which is characterized by comprising the following materials: RE contained in the RE-Fe-B part hydrogen storage alloy, a replaced element of the RE, B, a replaced element of the B, an RE-Fe alloy, a B-Fe alloy, a B-Ni alloy, an RE-Fe-B alloy, a LaNi5 type alloy and other preliminary alloys containing composition elements, wherein two or more materials are selected to be prepared according to a chemical composition formula of the RE-Fe-B part hydrogen storage alloy; one of a high-temperature smelting casting method, a high-temperature smelting-quick-quenching method, a high-temperature smelting-gas atomization method and a powder sintering method or a mechanical alloying method is adopted to manufacture the RE-Fe-B part hydrogen storage alloy; and the preparation process needs to be carried out under the protection of inert gas or a vacuum environment. The RE-Fe-B part hydrogen storage alloy is in a multiphase structure and comprises a LaNi5 phase, a La3Ni13B2 phase, a rich Fe or rich Ni phase, and the like. The prepared RE-Fe-B part hydrogen storage alloy has good activation property due to the special composition and structure, large current discharge capability, low-temperature electrochemistry property and charge / discharge or hydriding / dehydriding circulating stability, the maximum discharge capacity of the RE-Fe-B part hydrogen storage alloy can reach 400mAh.g<-1>, and the cost of the RE-Fe-B part hydrogen storage alloy is lower than that of other known hydrogen storage alloys; and in addition, the prepared RE-Fe-B part hydrogen storage alloy is used for battery negative pole materials, gaseous phase hydrogen storage materials and heat pump materials.

The device comprises a crucible with a support, a heater and at least one heat-insulating screen, wherein, according to the invention, the heater is made of a starting flexible carbon-bearing material in the form of a cylinder whose ends are fixed between coaxially arranged rigid rings of carbon material that are connected to a power supply. And, the heater is made so that the wall thereof has its thickness determined from the relationship: delta . rho - c = 500 to 8500 J / m<2>. K, where: <> delta - heater wall thickness, m; rho - density of the material the heater is made of, kg / m<3>; and c - specific heat of the material the heater is made of (at working temperature), J / kg.K.

The invention relates to an optical strain gauge strip (1) for multi-axis strain measurement, comprising at least two straight optical fibre sections (2, 3, 4) with Bragg gratings (5), arranged adjacent to each other at a given angle (19) of 90 DEG or 45 DEG on a support layer (6) and supplied with light waves from a common injection optical fibre section (7). The invention is characterised in that all optical fibre sections (2, 3, 4, 7) are preferably provided on the support layer (6) in straight lines and a beam dispersion element (8) is arranged between the injecting optical fibre section (7) and the measuring optical fibre sections (2, 3, 4) with the Bragg grating (5).

The invention relates to a piezoelectric valve having a housing (1), comprising an inner chamber (2) through which a medium can flow, wherein at least one nozzle (3, 3'; 4) that communicates with an associated connection (5; 6) for the flow medium and having a sealing seat with a seat surface ends in said chamber. The inner chamber of the housing receives a piezoelectric flexible element (7) deformable by electric energization such that the nozzle (3, 3'; 4) can be closed by a section (9) of the flexible element, the section being moveable relative to the nozzle due to the deformation of the flexible element (7). The flexible element comprises a support (13; 14) in the region opposite the nozzle, the support being made of an elastic resilient material. The sealing seat is arranged on a nozzle insert (15; 30) on the front side, said insert being movably arranged substantially perpendicular to the seat surface (17) in a receptacle (24; 24') on the housing, wherein between the receptacle and the associated nozzle insert, a thermally expandable compensation member (25) acts.

The invention discloses a GN@cellulose based solid-solid phase change material and a preparation method and application thereof. The method comprises the following steps of (1) dissolving cellulose; (2) carrying out homogeneous phase grafting modification: reacting a halogenated acyl halide monomer with cellulose to obtain cellulose ester; (3) carrying out ATRP method reaction: uniformly dispersing the cellulose ester, GN and a solvent B obtained in Step (2), and then adding a ligand, a catalyst and alkyl acrylate to react to obtain a reaction mixture; and (4) carrying out purification: purifying the reaction mixture obtained in Step (3) to obtain a GN@cellulose-g-polyalkylacrylate copolymer. The copolymer is subjected to melt extrusion spinning to obtain a solid-solid phase change fiber.The copolymer is is subjected to electrostatic spinning to obtain a film. According to the method, cellulose fibers are used as a substrate, halogen functional groups are grafted through an acylationreaction, alkyl acrylate is grafted on a cellulose skeleton through ATRP, graphene is used as a reinforcing material, and later-stage processing is not needed, so that the fibers with flexibility, high thermal conductivity and high enthalpy value are prepared, and secondary processing is facilitated.

The invention relates to the field of pharmaceutical preparations, and discloses repaglinide common tablets and a preparation method thereof. The repaglinide common tablets comprise the following raw materials by weight: 2 parts of repaglinide, 2.4-2.8 parts of a solubilizer, 4.5-5.5 parts of a binder, 7-9 parts of a disintegrating agent, 1-3 parts of a lubricant, and 155-173 parts of a filler, wherein the disintegrating agent is calcium carboxymethylcellulose, and the lubricant is sodium stearyl fumarate. In the prior art, the repaglinide has characteristics of poor stability, oxygen unstability and hygrothermal unstability. According to the present invention, the calcium carboxymethylcellulose is adopted as the disintegrating agent and the stabilizing agent so as to increase the stability of the tablets, effectively delay repaglinide degradation and ensure drug quality; the sodium stearyl fumarate is adopted as the lubricant, such that the hydrophobicity is weak, the delayed effect is low, and the influence on the repaglinide is low; and the repaglinide common tablets of the present invention have characteristics of rapid disintegration, complete dissolution and good stability, and provide more excellent various indexes compared with the existing repaglinide common tablets.

The invention discloses a rare-earth series hydrogen storage alloy. The chemical formula of the alloy has the following general formula: Ml1-xDyx(NiaCobAlcMndCueFefSngCrhZni), wherein x is more than 0 and less than 0.3; a is more than 2 and less than 4; b is more than 0 and less than 0.3; c is more than 0.2 and less than 0.4; d is more than 0.2 and less than 0.5; e is more than 0 and less than 0.2; f is more than 0 and less than 0.25; g is more than 0 and less than 0.22; h is more than or equal to 0 and less than 0.18; and i is more than 0 and less than 0.28; and Ml is mixed rare earth. The alloy uses Cu, Cr, Zn, Fe and Sn to replace Co element in the rare earth series hydrogen storage alloy, can obviously improve the circulation stability of the hydrogen storage alloy, reduces the content of Co in the hydrogen storage alloy by over 60 percent compared with commercial hydrogen storage alloy MlNi3.55Co0.75Mn0.4Al0.3, and greatly reduces the production cost.

The invention relates to a piezoelectric valve having a housing (1), comprising an inner chamber (2) through which a medium can flow, wherein at least one nozzle (3, 3'; 4) that communicates with an associated connection (5; 6) for the flow medium and having a sealing seat with a seat surface ends in said chamber. The inner chamber of the housing receives a piezoelectric flexible element (7) deformable by electric energization such that the nozzle (3, 3'; 4) can be closed by a section (9) of the flexible element, the section being moveable relative to the nozzle due to the deformation of the flexible element (7). The flexible element comprises a support (13; 14) in the region opposite the nozzle, the support being made of an elastic resilient material. The sealing seat is arranged on a nozzle insert (15; 30) on the front side, said insert being movably arranged substantially perpendicular to the seat surface (17) in a receptacle (24; 24') on the housing, wherein between the receptacleand the associated nozzle insert, a thermally expandable compensation member (25) acts.

The invention discloses a solar battery with functional areas prepared by means of a digital-exponential hybrid doping mode and a preparation method of the solar battery. According to the preparation method, the functional areas of the solar battery are prepared through a digital doping and exponential doping cooperated mode. According to the digital doping and exponential doping cooperated mode, digital doping is carried out on a doping area sectionally, and a dopant is doped into a reaction chamber, the flow rate of the dopant going through digital jump; and exponential change occurs between two adjacent doping concentrations. According to the solar battery using the digital-exponential hybrid doping mode, the digital-exponential hybrid doping mode is adopted to form the main functional layers of the solar battery, so that an enhanced built-in electric field can be formed, and more effective separation of photo-generated carriers can be prompted. With the solar battery adopted, the lifetime of the photo-generated carriers can be prolonged remarkably, so that the mobility of the carriers can be improved; and the open-circuit voltage of the battery can be improved significantly; and a solid foundation can be laid for the development of next-generation ultra-efficient solar batteries.

The invention discloses a method and application for preparing GN@cellulose-based solid-solid phase change fibers in different phases. The method includes: (1) cellulose fiber dispersion; (2) surface graft modification: reacting halogenated acid halide monomers with cellulose to obtain cellulose ester; (3) SI-ATRP method reaction: step 2) After the obtained cellulose ester, GN and solvent B are uniformly dispersed, a ligand, a catalyst and an alkyl acrylate are added to react to obtain a reaction mixture; (4) purification: after purifying the reaction mixture obtained in step 3), GN@cellulose- g-Polyalkylacrylate solid-solid phase change fiber. The fiber is pressed into a film to obtain a film. In this method, cellulose fibers are used as the matrix, halogen functional groups are grafted through an acylation reaction, and alkyl acrylates are directly grafted on the surface of the modified cellulose fibers through SI-ATRP without changing the structure of the cellulose fibers. For reinforcing materials, fibers with flexibility, high thermal conductivity and high enthalpy value are prepared without post-processing, which is conducive to secondary processing.

The invention discloses a GN@cellulose-based solid-solid phase change material and a preparation method and application thereof. The method includes: (1) dissolving cellulose; (2) homogeneous graft modification: reacting halogenated acid halide monomers with cellulose to obtain cellulose ester; (3) ATRP reaction: reacting the obtained cellulose ester in step 2). After the cellulose ester, GN and solvent B are uniformly dispersed, add ligand, catalyst and alkyl acrylate to react to obtain a reaction mixture; (4) purification: after purifying the reaction mixture obtained in step 3), GN@cellulose-g- Polyalkylacrylate copolymer. The copolymer is melt extruded and spun to obtain solid-solid phase change fibers. The copolymer was electrospun to obtain a film. In this method, cellulose fiber is used as the matrix, halogen functional groups are grafted through acylation reaction, and alkyl acrylate is grafted on the cellulose skeleton through ATRP, and graphene is used as reinforcing material to prepare flexible and high thermal conductivity without post-processing. , Fiber with high enthalpy value, which is conducive to secondary processing.

The invention discloses a diversion type biaxial membrane swing type water turbine. A diversion cover, a turbine support and a film blade structure are used to form a water turbine structure with a diversion effect. A diversion cover is respectively arranged on both sides of the turbine support. One side of the air guide cover is provided with a rectangular opening, so that the angle between the plane where the side of the air guide cover is provided with the rectangular opening and the plane where the axes of the two rotating support shafts are located is an acute angle. The guide vane on the flow cover is the position of the flow guide cover, which guides the water flow entering the turbine bracket, accelerates the water flow to the upstream surface, and at the same time reduces the water flow to the reverse water surface, reducing the generation of resistance. At the same time, combined with the film blade structure , the same direction torque can be received on both the downstream surface and the upstream surface, thus greatly improving the efficiency of the whole machine. The conversion rate of water flow transmission.

The invention discloses a unilateral core-winding clamping type brush sealing structure. The unilateral core-winding clamping type brush sealing structure comprises a front baffle plate, a C type clamp, a rear baffle plate, a core wire, a front end decompression plate, a rear end decompression plate and a brush wire, wherein the C type clamp is clamped and fixed between the front baffle plate andthe rear baffle plate, the front end decompression plate and the rear end decompression plate are connected to the lower ends of the front baffle plate and the rear baffle plate correspondingly, and the front end decompression plate and the rear end decompression plate raise inwards correspondingly to form a decompression chamber. The lower end of the C type clamp is connected with a vertical baffle plate, and the brush wire is wound on the core wire and arranged in a clamping hole of the C type clamp in a tightly clamped mode. In the initial mounting state, the free end of the brush wire is attached to the inner side of the vertical baffle plate and the inner side of the rear end decompression plate sequentially, and extends out of the decompression chamber and in contact with a rotor. The unilateral core-winding clamping type brush sealing structure is low in production cost, the material of the brush wire can select a metal or non-metal material, the brush wire is replaceable and simple to mount, the hysteresis effect is reduced greatly, the property of the brush wire is stable and reliable, the service life of the brush wire is long, and the brush sealing structure can be widely applied to various kinds of turbine mechanical equipment.

A solar cell with functional areas prepared by a digital-exponential hybrid doping mode, and a method for preparing the solar cell. Functional areas of a solar cell are prepared by a digital doping and exponential doping cooperated mode. The digital doping and exponential doping cooperated mode refers to: digital doping is carried out sectionally in a doped region, the flow capacity of a dopant is doped into a reaction chamber in a digital transition, and an exponential change occurs between two adjacent doping concentrations. According to the solar cell prepared by a digital-exponential hybrid doping mode, the digital-exponential hybrid doping mode is used in the main functional layers of the solar cell, so that a built-in electric field can be enhanced, and photo-generated carriers can be separated more effectively, and the lifetime of the photo-generated carriers can be prolonged, thereby improving the mobility of the carriers, and increasing an open-circuit voltage of the cell.

The invention relates to rubber composite used for bonding a belt ply of a tire and the tire manufactured with the composite. The rubber includes 100 parts by weight of raw material rubber; 0.01 to 10 parts by weight of aromatic polyamide short fiber particles formed by more than two strands of aromatic polyamide short fiber and containing rubber penetrated between the twisted aromatic polyamide short fibers. The rubber composite used for bonding the belt ply of the tire can improves the rigidity of rubber used for bonding the belt ply of the tire, reducing bonding thickness and reducing hysteresis effect of the rubber used for bonding the belt ply of the tire, so that energy loss caused by the rotation of the tire can be reduced.

A measurement and control integrated eddy current type hot bending equipment and control method for 3C components, including a furnace body mechanism and a control end, a measurement and control integrated eddy current type mechanism is installed in the furnace body mechanism, an actuator is installed on the furnace body mechanism, measurement and control The integrated eddy current mechanism and the actuator are respectively connected to the control end by communication. Three kinds of workstations are set up on the furnace body mechanism in sequence, namely the preheating and heating workstation, the hot bending forming workstation and the cooling and cooling workstation, and the preheating and heating workstation, The hot bending forming workstation and the cooling and cooling workstation respectively include a measurement and control integrated eddy current mechanism. The measurement and control integrated eddy current mechanism has a mold for hot bending of 3C components, and an auxiliary mechanism is installed on the furnace body mechanism. The auxiliary mechanism is used to push the translation Mold, one workstation corresponds to one actuator. The invention reduces the heating time and the production beat, and improves the production efficiency.