146results about How to "Control heating rate" patented technology

The invention discloses a multi-ion-doped carbon-coated lithium iron phosphate battery material and a preparation method thereof. The material has a structure of Li1-x M'x Fe1-y My (PO4)1-zFz/C, wherein x is more than or equal to 0.001 and less than or equal to 0.1, y is more than or equal to 0.001 and less than or equal to 0.1, z is more than or equal to 0.001 and less than or equal to 0.1, M' and M are respectively metal ions doped at the lithium position and the iron position, C is organic matter pyrolysis carbon covered on the surface of lithium iron phosphate, and M' and F come from fluoride M' Fn (n is equal to 1, 2, 3 or 4). The preparation method comprises the steps of: (1) preparing doped iron phosphate containing crystal water by a coprecipitation method; (2) carrying out heat treatment on the iron phosphate containing the crystal water, and removing the crystal water; and (3) mixing the doped iron phosphate, lithium source, the fluoride M' Fn and organic carbon source, carrying out ball-milling, drying and roasting to obtain the multi-ion-doped carbon-coated lithium iron phosphate battery material. The preparation method is simple and easy in technology, and the prepared lithium iron phosphate is high in specific discharge capacity and excellent in rate capability, thus having application prospect in the field of a power battery.

The invention discloses a deicing robot based on an automatic tensioning U-shaped heating mechanism, relates to the technical field of protection equipment for overhead power transmission cables, and solves the problem of deicing the existing deicing mechanism with strong binding force and thick ice layer. The problem of limited ice capacity, including the casing, on which the driving wheel and the driven wheel are installed, the driving motor and the worm gear mechanism are arranged inside the casing, the worm gear is arranged above the worm and meshed with the worm, and the worm wheel and the driving wheel pass through the transmission belt A Transmission connection, the front end of the worm sticks out of the casing and is connected with a rotating body that rotates with the rotation of the worm. The rotating body is equipped with a mechanical deicing mechanism, including a thermal deicing mechanism. The thermal deicing mechanism includes a stepping motor, a transmission belt B, The U-shaped heating plate and the shells symmetrically arranged on both sides of the transmission line can effectively remove the icing with strong binding force and thick ice layer, such as rain rime and mixed rime, and avoid thermal De-icing mechanisms are prone to damage to the interior of power lines due to sustained heat.

The invention provides a Lansoprazole lyophilized powder injection preparation and its preparing method. The preparation is used for treating peptic ulcer and belongs to the field of medicines. The Lansoprazole lyophilized powder injection preparation provided in the invention comprises Lansoprazole, a chemical stabilizing agent, a physical form stabilizing agent and a pH conditioning agent; and through quantified proportioning and synergism of the above-mentioned components, stability of the preparation can be effectively improved. According to the invention, the preparation has stable quality and is safe to use; and the preparation method is simple and is convenient for industrial large-scale production.

The invention provides a preparation method of an amorphous alloy fiber and a device for implementing the preparation method. The preparation method utilizes superplasticity of an amorphous alloy material. The preparation method comprises the following steps of fixing one end of an amorphous alloy material such as a bar, a wire or a band, connecting the other free end of the amorphous alloy material to an external force supplement device, arranging a heater for heating the amorphous alloy material between the two ends, when the temperature of the amorphous alloy material is in a sub-cooled liquid phase region range from a glass transition temperature to an initial crystallization temperature and is increased to a softening temperature, starting the external force supplement device, and slowly drawing the free end by the external force supplement device so that the amorphous alloy material produces plastic deformation and forms amorphous alloy fibers. The preparation method is simple and feasible, has a low cost, can prepare the amorphous alloy fibers with small diameters and can widen an amorphous alloy fiber application scope.

A preparation method of a nitrogen-doping carbon substrate-supported Fe3O4 composite material sodium-ion battery negative electrode material comprises the steps of dissolving urea and a soluble trivalent complexing ferric salt in deionized water according to a mass ratio being (4:1)-(4:4), and uniformly mixing the urea and the soluble trivalent complexing ferric salt to prepare a solution A; freezing the solution A to obtain a solid B after a pH value of the solution A is adjusted to 3-7; and pyrolyzing the solid B under a temperature of 400-700 DEG C after the solid B is frozen and dried. The raw material adopted by the preparation method has the advantages of environmental friendliness, wide source, low cost and the like, and the preparation method is easy to operate; the trivalent ferric salt is used as an iron source and a nitrogen-doping nitrogen source, active sites on a Fe3O4 electrode material are increased due to nitrogen doping, and intercalation and de-intercalation of sodium ions are facilitated; any surfactant is not added, reaction is completed at one time, and subsequent processing is not needed; and the nitrogen-doping carbon substrate-supported Fe3O4 composite material prepared according to the method is stable in cycle performance, and the conductivity of the nitrogen-doping carbon substrate-supported Fe3O4 composite material is improved.

The invention relates to an integrated device and method for forming of a carbon fiber composite material and sticky-riveting of the carbon fiber composite material and a metal sheet piece, and belongs to the technical field of composite riveting. The technical problems that gaps exist in connecting of the composite material and a metal material, the composite material and an adhesive layer are damaged due to riveting, and the technology procedure is complicated exiting in the prior art are solved. The carbon fiber composite material and metal material sticky-riveting method applying the device comprises the following steps that a carbon fiber prepreg is subjected to die-filling; the carbon fiber prepreg is subjected to gelling; the gelled carbon fiber prepreg and a metal sheet are subjected to die-closing and pressurizing; the carbon fiber prepreg and the metal sheet piece are subjected to heating curing; cooling and die-releasing are conducted; and burrs and flashings at the edge parts when a carbon fiber composite material plate and a metal sheet sticky-riveting test piece are formed are removed. According to the integrated device and method for forming of the carbon fiber composite material and sticky-riveting of the carbon fiber composite material and the metal sheet piece, the effect that bonding can be completed while the carbon fiber composite material is subjected to die-pressing forming is achieved; and the bonding property is effectively improved, and the bonding strength is improved.

The invention provides a preparation method of sheet-shaped agglomerated-state spherical nano MoO3 powder and belongs to technical application of preparation of nano powder through a wet chemical method. The preparation method of the MoO3 composite powder comprises the following steps: after mixing and stirring ammonium tetramolybdate and a graphene oxide solution, placing for a period of time invacuum; continually quickly freezing with liquid nitrogen and freezing and drying; finally, calcining in the air to obtain the sheet-shaped agglomerated-state spherical nano molybdenum trioxide powder. The preparation method provided by the invention has the advantages that the shape of the powder is unique and the granularity of the powder is uniform; raw materials are easy to obtain and a technology is simple and convenient; the preparation method also has the advantages of simplicity in operation, controllable process, stable product and the like. Prepared nano spherical MoO3 grains are uniformly arrayed to form a large sheet shape, and the powder has extremely excellent photocatalytic performance.

The invention relates to a preparation method of a carboxylic butadiene-styrene latex; reaction thermal energy is provided for reaction of the carboxylic butadiene-styrene latex through high-speed water vapour; after being cooled, the water vapour is converted into high-temperature deionized water; furthermore, the high-speed water vapour is also used for driving liquid in a reaction container to rotate; the liquid in the reaction container is dispersed by a water vapour flow to form a lot of tiny steam and water mixtures; a material in the reaction container is driven to flow rapidly; substances and temperature in the reaction container are uniform to distribute; the polymerization reaction is also uniform; therefore, the final product, namely the carboxylic butadiene-styrene latex, is steady in molecular structure, easy in molecular weight control and more centralized in particle diameter distribution; the balanced and good mechanical property can be obtained; and the yield and quality of the product are increased.

The invention discloses a welding method of a super-thick steel casting. Process steps include S1, preparing a joint: an asymmetric X-type groove is adopted; S2, preheating: the front side and the reverse side are uniformly heated, the preheating temperature is set within the range of 150-160 DEG C, and the heating rate does not exceed 100 DEG C / h; S3, back welding: gas shielded welding backingis carried out on flux-cored welding wires for three layers, and fire warming is carried out to remove stress after each weld seam is welded; S4, reverse side air gouging: air gouging back chipping and carburized layer removal are carried out; S5, reverse side back welding: back welding is carried out by three layers after the temperature of the steel casting reaches a preheating temperature according to the method described in the step 2, and fire warming is performed on each weld seam to remove stress; S6, filling and cover surface welding: the front side and the reverse side are welded respectively by one welder simultaneously and symmetrically, and hammering is carried out layer by layer after each layer of weld beads of each weld seam is welded; and S7, 550 DEG C *2h heat treatment after stress removal is carried out immediately after the completion of welding. By means of the method, welding stress and welding deformation can be significantly reduced, and the probability of generating steel casting welding cracks is greatly reduced.

The invention provides a system and method for high-temperature testing of complex permittivity in an oxygen-deficient environment. The system comprises a testing portion, a pneumatic portion, a sample guiding portion, a heating and cooling temperature control portion and a concentration pressure and temperature control portion. The method comprises the steps that the resonant frequency and the quality factor of a cavity are tested, a rod-shaped sample is placed in the cavity, vacuumizing is conducted on a reservoir firstly, and after vacuumizing, nitrogen and oxygen are fed into the reservoir; an induction heating device is started; when the temperature is raised to a needed temperature through heating, the pneumatic device is started instantly, the heated sample is rapidly ejected into a cylinder resonant cavity through a metal supporting rod, and testing is conducted; the resonant frequency and the quality factor of the resonant cavity and the complex permittivity and the loss tangent value of the sample are tested through a vector network analyzer. By the adoption of the system and method for high-temperature testing of complex permittivity in the oxygen-deficient environment, variable-temperature testing can be conducted on the dielectric property of a material in the oxygen-deficient environment, the heating power can be controlled through the external induction heating device, the testing temperature is higher than 1500 DEG C, and the testing pressure ranges from 0.02 MPa to 0.1 Mpa.

The invention discloses a high-hardness wear-resistant piston pin and a preparation method thereof. The preparation method comprises the following steps of firstly, respectively mixing matrix material powder and Co-Cr-W alloy powder with a binder, and performing granulation to obtain a matrix material feed and a high-hardness wear-resistant coating material feed; then, sequentially injecting the matrix material feed and the Co-Cr-W alloy coating material feed into a mold cavity by using an injection molding technology to obtain a product green body; removing the binder in the green body through catalytic debinding and thermal debinding processes; and finally, performing co-sintering densification to obtain the Co-Cr-W series high-hardness wear-resistant piston pin. The process is simple, the bonding performance of a coating layer and a matrix is good, and the piston pin has the characteristics of high hardness and wear resistance.

The invention discloses a temperature rise and fall control method in the rapid temperature rise thermal treatment process of Cu, In, Ga and Se solar cell sample pieces and a setting method of temperature rise and fall control and belongs to the field of conductor material thermal treatment manufacturing technologies. The speed of temperature rise and fall of a vacuum heating chamber is controlled by controlling the power-on/off time of a halogen tungsten lamp (in other words, the temperature rise time, the temperature fall time and the temperature maintaining duration are controlled by setting a program). Through the method, the limit that the temperature rise in the RTP is controllable while control over the temperature fall process is simplex is broken through, and the temperature rise and fall control method is a diversified thermal treatment process capable of simply achieving temperature rise and slow temperature fall.

The invention relates to the technical field of rare earth permanent magnets, in particular to a sintered neodymium iron boron magnet and a preparation method thereof. The sintered neodymium iron boron magnet is characterized in that according to the mass percentage composition, the general formula of the sintered neodymium iron boron magnet is ReaDybFe100-a-b-c-dBcMd; Re is one or more of Pr, Nd,La, Ce, Gd and Ho; M is one or more of Co, Cu, Al, Nb, Ga, Zr, Ti and Cr; and a is larger than or equal to 27 and smaller than or equal to 33, b is larger than or equal to 1.0 and smaller than or equal to 2.0, c is larger than or equal to 0.9 and smaller than or equal to 1.1, and d is larger than or equal to 0 and smaller than or equal to 5. Through the optimized process, smelting, single hydrogen breaking and powder making are not needed, and the using amount of heavy rare earth can be reduced to 1.5wt% or even 1.2wt%, so that rare earth is more uniformly distributed in the grain boundary, and the effective utilization ratio of the rare earth is improved; and according to the sintered neodymium iron boron magnet prepared through the process, while cost is reduced, the excellent magneticproperties are achieved.

The invention discloses a photo-thermal heat preservation type composite leather finishing agent based on a Pickering emulsion polymerization method, a preparation method and application thereof, andbelongs to the technical field of leather finishing agent preparation. According to the preparation method, the amphipathy is regulated and controlled through polydopamine modified Ti3C2; ultrasonic emulsification is carried out on the obtained amphiphilic polydopamine modified Ti3C2 nanosheet, a co-emulsifier, a vinyl monomer and water to obtain a pre-emulsion, and polymerization of the pre-emulsion is initiated by using a Pickering emulsion polymerization method to obtain the photo-thermal heat preservation type composite leather finishing agent. The photo-thermal heat preservation type composite leather finishing agent prepared by the method contains amphiphilic polydopamine modified Ti3C2 nanosheet with a synergistic photo-thermal conversion effect, the problem of sedimentation and agglomeration when Ti3C2 is introduced by a blending method is avoided, then the obtained photo-thermal heat preservation type composite leather finishing agent is applied to a leather finishing process,and a leather product capable of rapidly and spontaneously heating under natural illumination can be obtained, so that the total heat dissipation amount of a human body is reduced by reducing the temperature difference between the human body and the leather product, and the heat retention property of the leather product is improved.

The invention discloses a brazing method for a SiC particle-reinforced aluminum matrix composite. The brazing method comprises the following steps that S1, the SiC particle-reinforced aluminum matrix composite is put into water, grinding and ultrasonic washing are conducted, room temperature drying under the vacuum condition is conducted, and a pre-welding base material is obtained; S2, surface grinding and washing are conducted on aluminum-silicon-magnesium brazing filter metal, and welding brazing filter metal is obtained after drying; S3, a vacuum brazing furnace is vacuumized, and the pre-welding base body and the welding brazing filter metal are assembled and then put into the vacuum brazing furnace; and S4, the vacuum brazing furnace is heated to 580-600 DEG C, the temperature is kept for 25-35 min, cooling along with the furnace is conducted, welding is completed, and the welding piece is obtained. According to the brazing method, for the characteristic of the SiC particle-reinforced aluminum matrix composite, by the adoption of the vacuum brazing welding manner, the aluminum-silicon-magnesium brazing filter metal is used, the Ti active ingredient is added, the contact surface tension of the flux and the composite is improved, and the weld seam bonding force is improved. The brazing method has the beneficial effects of being excellent in shear strength, simple in process and easy to implement.

The invention belongs to the technical field of metallurgy chemical engineering and particularly relates to a blast furnace coal spraying-iron ore sintering experiment simulation device. The blast furnace coal spraying-iron ore sintering experiment simulation device comprises a coal powder combustion furnace, a sintering furnace, a hot air furnace communicating with the coal powder combustion furnace or the sintering furnace, a support moving the hot air furnace to communicate with the coal powder combustion furnace or the sintering furnace, a control and data collection system connected with the coal powder combustion furnace, the sintering furnace and the hot air furnace, and an air cylinder supplying air to the control and data collection system. Through the blast furnace coal spraying-iron ore sintering experiment simulation device provided by the invention, the function that coal powder-hot air continuous combustion and iron ore hot air sintering are simulated simultaneously is achieved, the experiment device utilization ratio is increased, device cost is lowered, and the practical application problems that the occupied area is large, the area of a laboratory is limited, and an experimental device is inconvenient to move are solved.

The invention provides a multi-ion co-doping lithium iron phosphate material and a preparation method thereof. The chemical formula of the multi-ion co-doping lithium iron phosphate material is Li<1-z>M<2>Fe<1-y>V<y>(PO<4>)<1-x>F<x>/C, wherein x is more than or equal to 0.001 but less than or equal to 0.1, y is more than or equal to 0.001 but less than or equal to 0.1, z is more than or equal to 0.001 but less than or equal to 0.1, and M is lithium position doping metal ion. The preparation method comprises the following steps of firstly, preparing vanadium ion doping iron phosphate Fe<1-y>V<y>PO<4>.2H<2>O containing crystal water; secondly, obtaining vanadium doping iron phosphate Fe<1-y>V<y>PO<4> which does not contain the crystal water by thermal processing; and finally, adding a ball-milling medium, carrying out ball-milling mixing, carrying out pre-sintering and then calcination in a high temperature, and cooling and grinding the mixture to obtain the multi-ion co-doping lithium iron phosphate powder material. The method is simple in process, energy consumption is relatively low, the raw material is low in cost, and industrial production at a large scale is facilitated.