75 results about "Sintering atmosphere" patented technology

The invention relates to a preparation method of a high-purity manganese target material, which belongs to the technical field of metallurgy, and comprises the following steps: firstly, drying manganese powder, then pouring the manganese powder into a graphite mold, and putting the graphite mold into a Joule hot sintering furnace for sintering, during sintering, a strategy of two-stage prepressing and four-stage gradient pressing of prepressing forming, low-pressure degassing, medium-pressure densification and high-pressure sintering is implemented, and low-temperature sintering is realized; through two-stage cooling after sintering, stress and cracking in the cooling process are avoided; by accurately controlling the temperature and time of each stage, the defects that high heating temperature and long heat preservation time are needed are overcome. The production process is integrally simplified, the internal stress is controlled to be effectively and gradually released at different temperatures, the porosity is reduced, and sintering cracking is avoided; by optimizing the sintering atmosphere of each stage, the influence of impurities such as oxygen in the air on the purity of the sintered manganese target material is avoided, and the purpose of preparing the high-purity manganese target material with low energy consumption, high efficiency and high quality is achieved.

The invention belongs to the technical field of metal ceramic, and particularly relates to a high-toughness metal ceramic particle and a preparation method thereof.The particle is characterized in that ceramic micro powder, surface modified ceramic powder and rare earth element carbonitride form a composite hard phase, and the composite hard phase is dispersed in a metal matrix composed of multiple metal elements; and synergistic regulation and control components are introduced to optimize interface bonding and tissue uniformity. Particles are subjected to a step-by-step heat treatment and isostatic pressing forming process, and a stable structure is formed by controlling the oxygen content and the sintering atmosphere. The obtained material has high bending strength, high fracture toughness and good thermal shock resistance, is suitable for the application field of wear resistance and crack resistance under extreme working conditions, and has tissue compactness and mechanical stability.

The invention provides a titanium-based ceramic target material and a preparation method and application thereof.The titanium-based ceramic target material is prepared from, by mass, 96.4 wt%-98.3 wt% of titanium oxide and 1.7 wt%-3.6 wt% of doped oxide, and the doped oxide is prepared from, by mass, 0.8 wt%-1.5 wt% of niobium oxide, 0.5 wt%-1.0 wt% of tantalum oxide, 0.3 wt%-0.8 wt% of tungsten oxide and 0.1 wt%-0.3 wt% of aluminum oxide. According to the method, the high-performance titanium-based ceramic target material is prepared by adopting a normal-pressure sintering method through multi-element synergistic doping and dynamic regulation and control of the sintering atmosphere, the titanium-based thin film prepared by sputtering the titanium-based ceramic target material can form a laminated thin film structure with an indium tin oxide (ITO) thin film, and high conductivity, high visible light transmittance and high electron mobility are achieved; and the actual requirements in the field of silicon-based and perovskite solar cells are met.

The invention belongs to the technical field of metal powder preparation, particularly relates to a high-efficiency and low-energy-consumption device and method for recycling and regenerating high-temperature alloy powder, and aims to solve the problems of high energy consumption, low efficiency, degraded powder performance, low cyclic utilization rate and the like in the existing recycling technology. A ceramic flash sintering technology and a metal material current-assisted sintering device are innovatively combined, a special device with a unique current-assisted sintering mechanism is developed, the device can efficiently and rapidly sinter large-size metal blanks under the low-pressure condition, the sintering time is shortened by 30%-50%, the temperature is reduced by 100-200 DEG C, the energy consumption of a unit product is reduced by 40% or above, and the production efficiency is improved. And meanwhile, by accurately controlling the sintering atmosphere and pressure, it is ensured that the oxygen content of circulating powder is lower than 50 ppm. According to the method, through the pressing-sintering-hot isostatic pressing treatment process, the recycled powder can be directly returned to the powder manufacturing procedure, the cyclic utilization rate of 95% or above can be achieved without re-smelting, and an innovative solution is provided for sustainable utilization of the high-value metal powder.

The invention belongs to the technical field of heating bodies, and particularly relates to a preparation method of a porous LSMO heating body. The preparation method comprises the following steps: preparing a metal salt solution by using metal salt and a solvent; adding citric acid into the metal salt solution, and stirring to obtain complex sol; adding a PVA solution into the complex sol, adding or not adding the quantum dot dispersion liquid, and stirring to obtain a mixed solution; adding a pore-forming agent into the mixed solution, and carrying out ball-milling dispersion to obtain a precursor solution; and defoaming the precursor solution, adding a monomer, a cross-linking agent, an initiator and a catalyst, performing injection molding, and then performing drying, degreasing, low-temperature sintering and high-temperature sintering to obtain the porous LSMO heating element. The material disclosed by the invention can stably exist in a high-temperature sintering atmosphere, can be well compatible with an LSMO substrate, does not damage the integrity of a ceramic structure, and can improve the conductivity and the thermal response speed.

The invention discloses a Ti-O electronic compound, a sulfur lithium battery electrode material, a preparation method and application, and belongs to the technical field of electrode material preparation. The preparation method comprises the following steps: (1) uniformly mixing Ti powder and TiO2 powder according to the stoichiometric ratio of Ti to TiO2; (2) pressing the mixed powder obtained in the step (1) under the condition of 150-250 MPa to obtain a sintered body; and (3) the sintered body is wrapped with Ti powder, then high-temperature sintering is conducted, cooling is conducted after sintering is finished, and the Ti-O electronic compound is obtained. The invention provides a simple preparation method for synthesizing a high-purity Ti-O electron compound, and a lithium-sulfur battery positive electrode based on the Ti-O electron compound as a catalytic carrier is prepared. The powder embedding high-temperature sintering synthesis of the Ti-O electronic compound is realized by controlling key parameters such as powder particle size, compaction density, sintering atmosphere and temperature, and the sulfur positive electrode of the lithium-sulfur battery with high rate performance is prepared.

The invention provides a layered-perovskite biphase potassium ion battery positive electrode material as well as a preparation method and application thereof, and belongs to the field of new energy materials. The preparation method of the material comprises the following steps: S1, weighing a proper amount of a potassium source, a manganese source and a praseodymium (or lanthanum and gadolinium) source in a ball milling tank; s2, ethanol is added for ball milling treatment, and a mixture is obtained; s3, drying the mixture; s4, the obtained dried product is subjected to heat treatment, the heat treatment temperature is 850-900 DEG C, the heat treatment time is 12-15 h, then the dried product is cooled to the room temperature, and a black product is obtained; and S5, grinding, sieving and drying the obtained product to obtain the positive electrode material of the potassium ion battery. According to the preparation method, a special sintering atmosphere is not needed, the layered-perovskite double-phase positive electrode material can be obtained only through one-time calcination, and the prepared positive electrode material has better circulation and rate performance compared with a layered single-phase positive electrode material.

A method of forming a monolithic article includes extruding an extrudable composition to form an extrudate, the extrudable composition including a binder, inorganic particles, and graphite particles, the extrudate including an exterior skin and a core disposed within the exterior skin; drying the extrudate; debinding the extrudate in a debinding atmosphere at one or more debinding temperatures to remove the binder from the extrudate; and sintering the extrudate in a sintering atmosphere at one or more sintering temperatures to remove the graphite particles from the exterior skin of the extrudate and to sinter the inorganic particles of the extrudate, to thereby form the monolithic article. The one or more debinding temperatures are less than 650 °C. The one or more sintering temperatures are greater than or equal to 650 °C and the sintering atmosphere includes an oxygen concentration less than or equal to 2.5%.

This invention provides a solar cell, its fabrication process, a tandem solar cell, and a photovoltaic module. The fabrication process of the solar cell includes: providing a cell substrate; printing a conductive material onto the cell substrate; and curing the conductive material to form initial grid lines. The conductive material includes bismuth-based lead-free glass; the conductive material also includes copper powder and nickel powder; the mass ratio of copper powder to nickel powder is 80~99.5:0.5~20, and the copper powder includes flake-shaped copper powder and spherical copper powder. In the fabrication process of this invention, the conductive material, through a ternary synergistic system of "copper-nickel-glass" and a dual-morphology copper powder composite design, achieves multiple effects such as suppressing copper diffusion and oxidation and improving adhesion under an air-sintering atmosphere, thereby improving the fill factor and photoelectric conversion efficiency of the solar cell.

The invention provides a non-pressure nano-silver sintering method for welding a SiC power device, and relates to the technical field of semiconductor chips. Comprising the steps that a molybdenum plate substrate and a power chip are cleaned, the thickness of the molybdenum plate substrate is 1 mm, and the power chip is of a junction barrier Schottky diode structure; preparing a silver coating on the cleaned molybdenum sheet substrate; the nano-silver soldering paste is stirred; the silver plating layer is coated with nano-silver soldering paste, and the thickness of the coated nano-silver soldering paste is 50 microns; mounting a power chip on the coated nano-silver soldering paste; the surface-mounted power chip is sintered and cooled in sequence, two times of heat preservation operation are adopted in the sintering process, formic acid mixed gas and nitrogen mixed gas are adopted as the sintering atmosphere, the temperature of the first time of heat preservation operation is 140 DEG C, the duration of the first time of heat preservation operation is 1 h, the temperature of the second time of heat preservation operation is 220 DEG C, and the duration of the second time of heat preservation operation is 2 h. Therefore, when the SiC power semiconductor chip needs to continuously work at the high temperature of 250 DEG C, the performance reliability can be ensured.

The invention discloses a BaTiO3-based ceramic material with high insulation characteristic, giant dielectric constant and low loss, and belongs to the technical field of ceramic preparation. The BaTiO3-based ceramic material is prepared from the following raw materials in parts by mole: 100 parts of BaTiO3, 0.2-0.8 part of Nb2O5, 1.6-3.5 parts of MgCO3, 0.5-1.2 parts of MnO2, 0.8-1.6 parts of CaZrO3, 0.5-1.2 parts of BaSiO3 and 0.8-1.4 parts of rare earth oxide, a core-shell-insulating layer structure is formed by controlling the types, the content and the doping sequence of doped ions and the sintering atmosphere and temperature, a dielectric constant increasing and loss suppression equilibrium system is constructed in the BaTiO3-based ceramic material, and the dielectric constant of the BaTiO3-based ceramic material is increased. According to the BaTiO3-based ceramic material and the preparation method thereof, effective suppression of carrier migration by the insulating layer is achieved, meanwhile, the promotion effect of a defect structure in crystal grains on polarization response is enhanced, and the obtained BaTiO3-based ceramic material has excellent comprehensive electrical properties: in a wide temperature range of-55 to 150 DEG C, the average crystal grain size is smaller than 1 mu m, the dielectric constant is as high as 1 * 10 < 5 >, the dielectric loss is lower than 3.5%, and the dielectric property is excellent. And the insulation resistivity exceeds 8 * 10 < 11 > omega.cm.

A method for preparing an oxide sputtering target and a method for forming a transparent conductive oxide thin film are disclosed. The method for preparing the oxide sputtering target includes the following steps: obtaining a mixture comprising metal oxides; introducing the mixture into a sintering furnace; and sintering the mixture in the following manner: simultaneously heating the mixture by introducing oxygen into the sintering furnace at a first flow rate; simultaneously heating the mixture by introducing oxygen into the sintering furnace at a second flow rate; and simultaneously heating the mixture by introducing oxygen into the sintering furnace at a third flow rate. The metal oxides consist only of In₂O₃ and GeO₂. The first heating is performed until the sintering atmosphere reaches any temperature within the range of 1050°C to 1150°C, and the second heating is performed until the sintering atmosphere reaches any temperature within the range of 1200°C to 1300°C. The first and third flow rates are greater than the second flow rate.

A method of forming a monolithic article includes extruding an extrudable composition including a binder, inorganic particles, and graphite particles to form an extrudate, the extrudate including an outer skin and a core disposed within the outer skin; drying the extrudate; degreasing the extrudate in a degreasing atmosphere at one or more degreasing temperatures to remove the binder from the extrudate; and sintering the extrudate in a sintering atmosphere at one or more sintering temperatures to remove the graphite particles from the outer skin of the extrudate and sinter the inorganic particles of the extrudate, thereby forming the unitary article. The one or more degreasing temperatures are less than 650 DEG C. The one or more sintering temperatures are greater than or equal to 650 DEG C, and the oxygen concentration of the sintering atmosphere is less than or equal to 2.5%.

This application relates to a relaxor ferroelectric piezoelectric ceramic material, its preparation method, and its application, belonging to the field of piezoelectric ceramic technology. The method includes: obtaining a ceramic precursor powder after pre-firing, grinding, and drying; preparing the ceramic precursor powder into a casting slurry to form a ceramic green sheet; printing internal electrodes on the ceramic green sheet and performing lamination pressing to obtain a laminated green sheet; hot-cutting the ceramic green sheet to obtain the ceramic green sheet, wherein the internal electrode is an Ag-Pd-Cu ternary metal system, with Ag at 80-90 wt%, Pd at 5-15 wt%, and Cu at 3-8 wt%; performing staged atmosphere co-firing treatment; and performing electrode connection and polarization treatment on the sintered ceramic to obtain a laminated piezoelectric ceramic device. This application synergistically controls the composition of the internal electrode and the sintering atmosphere path, improving the bonding performance of the ceramic-electrode interface, reducing thermal stress concentration, and enhancing the stability and reliability of the laminated piezoelectric ceramic during polarization and use.

The application discloses a sintering method of a multilayer chip ceramic capacitor, which comprises the following steps: 1) placing a coated nickel net in a nitrogen atmosphere with an oxygen content of 10-100 ppm for oxidation treatment; 2) uniformly stacking and arranging ceramic blanks on the coated nickel net subjected to the oxidation treatment for degassing treatment; 3) transferring the ceramic blanks and the coated nickel net subjected to the degassing treatment as a whole into a tunnel furnace, then introducing nitrogen and hydrogen, and then controlling the oxygen content in the tunnel furnace for three-stage sintering, so as to obtain the multilayer chip ceramic capacitor. The sintering method of the multilayer chip ceramic capacitor does not cause the product performance degradation problem caused by poor sintering atmosphere uniformity, the service life of the coated nickel net is long, the electric performance and reliability of the obtained MLCC are good, and the method is suitable for large-scale popularization and application.

The object of the present invention is to provide a preparation process of SrTiO3-LaAlO3-based microwave dielectric ceramics and their resonators, with the chemical formula Sr(y-z)CazTi1-mCemO3-xLa1-nGanAlO3, where 0.7 ≤ x ≤ 1.15, 0.98 ≤ y ≤ 1.01, 0.05 ≤ z ≤ 0.15; 0.001 ≤ m ≤ 0.01; 0.001 ≤ n ≤ 0.015; the sintering conditions of the resonator are: in air, the sintering temperature is 1500 °C to 1600 °C; the resonance frequency is 2.4 to 2.6 GHz, the Q value is 17700 to 19800, and the temperature coefficient of resonance frequency is 0 ± 5 ppm / °C. The sintering conditions of this resonator are relatively simple, the sintering atmosphere is air, the performance has been greatly improved, the performance is stable, and it can meet the application requirements of modern communication technologies, and can be widely used in the preparation of microwave components such as microwave dielectric resonators.

The application relates to a preparation method of high-purity manganese target material, and belongs to the technical field of metallurgy, which comprises the following steps: firstly, manganese powder is dried, then the manganese powder is poured into a graphite mold and placed into a joule heat sintering furnace for sintering; during sintering, a two-stage pre-pressing and four-stage gradient pressing strategy is implemented, low-temperature sintering is realized, stress and cracking in the cooling process are avoided through two-stage cooling after sintering, the temperature and time of each stage are accurately controlled, and the defects of high heating temperature and long holding time are avoided. The application simplifies the production process as a whole, controls the effective step-by-step release of internal stress at different temperatures, reduces porosity, avoids sintering cracking, optimizes the sintering atmosphere of each stage, avoids the influence of impurities such as oxygen in the air on the purity of the sintered manganese target material, and realizes the purpose of preparing high-purity manganese target material with low energy consumption, high efficiency and high quality.

The invention provides a preparation method of a diamond coating, a crankshaft and a compressor, relates to the technical field of compressors, and solves the technical problems that the preparation process of the diamond coating is complicated, the cost is high, and the binding force of the coating is not high. The preparation method of the diamond coating comprises the following steps: preparing diamond composite slurry; wherein the diamond composite slurry comprises the following components in percentage by weight: 75%-90% of a wear-resistant phase, 2%-8% of a bonding phase and 5%-18% of an organic solvent; coating the surface of a crankshaft material with the prepared diamond composite slurry; the crankshaft material coated with the slurry is put into a sintering furnace to be degreased and sintered, so that a diamond coating is formed on the surface of the crankshaft material; wherein the sintering atmosphere is hydrogen and nitrogen mixed gas. According to the preparation method, the diamond coating is prepared by preparing the slurry and then utilizing degreasing and sintering modes, so that the technological process is effectively simplified, the preparation cost is reduced, and meanwhile, the binding force of the coating and a matrix can be remarkably improved in the sintering process under the hydrogen-nitrogen mixed atmosphere.

This invention discloses a preparation process for high-zircon content zircon bricks, belonging to the field of refractory materials technology. This process aims to solve the technical problem of the inability to achieve low-temperature full densification of zircon materials due to their easy decomposition at high temperatures during traditional sintering. The main steps include: firstly, preparing active zircon micropowder with high lattice strain energy through high-energy grinding; secondly, using heterogeneous agglomeration technology to coat the active micropowder onto the surface of inert coarse aggregate, constructing a "core-shell" structure granulated material; and finally, performing low-temperature solid-state sintering below the decomposition temperature, utilizing the distortion energy stored in the active micropowder to drive densification. This process simultaneously controls amorphization degree, Zeta potential, debinding oxidation, sintering atmosphere, and cooling regime. This invention successfully prepares high-density, high-strength, highly erosion-resistant, and glass-phase-free high-performance zircon bricks, suitable for harsh environments such as glass melting furnaces, while completely avoiding the thermal decomposition of zircon.

The application belongs to the technical field of hard alloy and particularly relates to high-performance hard alloy rod for woodworking knives and a preparation method thereof. x Complex carbide powder, spherical Co powder and carbonyl Ni powder; S2, mixing (W, Cr)C x carbide powder, spherical Co powder and carbonyl Ni powder are mixed, ball-milled and spray-dried to obtain mixed granules; S3, the mixed granules are loaded into a porous mold for vertical compression molding to obtain a hard alloy rod blank, and the hard alloy rod blank is sintered to obtain the hard alloy rod, and the sintering atmosphere is methane. The application improves the uniformity of the green compact density through the porous mold vertical compression molding process and the gradient carburizing sintering process, avoids the muscle edge cracks and abrasion loss caused by horizontal compression molding, and forms the binder phase distribution with a specific gradient structure through high-temperature carburizing sintering, thereby significantly improving the impact resistance, wear resistance and corrosion resistance of the material, and the material is suitable for high-speed, high-load and strong-vibration working conditions.

The application discloses a preparation method of a solid-state electrolyte, which comprises the following steps: adding a precursor of an excess of lithium element into a previously prepared solid-state electrolyte embryo, mixing the precursor with a solvent, and then performing ball milling treatment; drying the mixture obtained after the ball milling treatment; performing shaping on the mixture; and performing sintering on the shaped body in a sintering atmosphere containing an inert gas, so as to obtain the solid-state electrolyte; wherein the prepared solid-state electrolyte is a tantalum-doped garnet-type solid-state electrolyte. The solid-state electrolyte prepared by the method has high ionic conductivity, can improve the performance of a full battery, and is beneficial to the commercial application of a lithium metal solid-state battery.

The invention belongs to the technical field of ceramic sintering, and particularly relates to a method for preparing fine-grain ceramic through photo-thermal rapid sintering, which comprises the following steps: (1) pressing a green body and discharging glue to obtain a plain blank; (2) placing the blank on a sample table, pushing the blank into a heating chamber, and controlling a sintering atmosphere; and (3) setting light-induced heating parameters, and heating and sintering the blank in the sintering atmosphere by using a halogen tungsten lamp tube array arranged in the heating chamber as a heating source. The near-infrared halogen tungsten lamp array arranged in the heating chamber of the furnace body is used for realizing rapid heating, the power of the halogen tungsten lamps is controlled through a program, the heating and cooling speed is accurately regulated and controlled, and ceramic is promoted to form a fine grain structure and be densified; by adjusting the power of the near-infrared halogen tungsten lamp array, the temperature increasing and decreasing rate of 20-400 DEG C / s can be regulated and controlled; the device has the characteristics of low energy consumption; equipment is simple, and operation is easy; the method can be used in vacuum, inert and oxidizing atmospheres, and is wide in application scene; and the material variety and shape selection is diversified, so that the method has relatively high universality.

This invention provides a solar cell, its fabrication process, a tandem solar cell, and a photovoltaic module. The fabrication process of the solar cell includes: providing a cell substrate; printing a conductive material onto the cell substrate; and curing the conductive material to form initial grid lines. The conductive material includes bismuth-based lead-free glass; the conductive material also includes copper powder and nickel powder; the mass ratio of copper powder to nickel powder is 80~99.5:0.5~20, and the copper powder includes flake-shaped copper powder and spherical copper powder. In the fabrication process of this invention, the conductive material, through a ternary synergistic system of "copper-nickel-glass" and a dual-morphology copper powder composite design, achieves multiple effects such as suppressing copper diffusion and oxidation and improving adhesion under an air-sintering atmosphere, thereby improving the fill factor and photoelectric conversion efficiency of the solar cell.

The application belongs to the technical field of sodium ion battery electrode materials, and particularly relates to a plasma-assisted regulated O3-type layered oxide positive electrode material and a preparation method and application thereof. The method is a high-temperature solid-phase sintering process in a plasma treatment atmosphere, and an O3-type layered oxide positive electrode material is obtained. The plasma treatment atmosphere is obtained by plasma treatment of a mixed gas containing nitrogen and oxygen. The sintering atmosphere is regulated by plasma assistance, and no additional post-cleaning or post-coating step is required. The in-situ optimization of the surface chemical state of the positive electrode material is realized, the surface residual alkali is effectively converted into a nitrate coating layer in-situ, the interface stability of the material is significantly improved, the rate performance and cycle stability are efficiently improved without changing the main structure, the process is simple, scalable, easy to repeat, efficient, and suitable for large-scale preparation of sodium ion battery positive electrode materials.

The application discloses a method and system for evaluating and comparing the influence of different gasification coarse slag pretreatment and sintering processes on the performance of thermal insulation bricks, and relates to the field of thermal insulation brick production, aiming to solve the problem that the understanding of how different pretreatment and sintering processes affect the performance of thermal insulation bricks and the inherent mechanism is not comprehensive when gasification coarse slag is used to prepare thermal insulation bricks, which limits the further application of gasification coarse slag in high value-added fields. The method prepares two thermal insulation brick samples with different processes, then compares and tests the macroscopic performance of the two samples and analyzes the microscopic structure and component mechanism, and finally explains how pickling pretreatment and / or composite sintering atmosphere affect the occurrence state, phase composition and microscopic structure of iron elements, and further cause differences in macroscopic performance based on the test results. The method has the advantages that the influence of different processes on the performance of thermal insulation bricks can be systematically evaluated, the correlation between microscopic mechanism and macroscopic performance can be further explained, and the resource utilization efficiency of gasification coarse slag can be optimized.

The invention belongs to the technical field of battery materials, and particularly relates to a nanofiber-coated lithium-rich manganese-based positive electrode material as well as a preparation method and application thereof. The invention provides a preparation method of a coated nanofiber lithium-rich manganese-based positive electrode material, which comprises the following steps: (1) mixing a first high-molecular polymer, a lithium-rich manganese-based precursor, a lithium salt and a first solvent to prepare an inner-layer spinning solution; (2) mixing a second high-molecular polymer, a solid electrolyte and a second solvent to prepare an outer-layer spinning solution; (3) performing coaxial electrostatic spinning and sintering by taking the inner-layer spinning solution as an inner layer and the outer-layer spinning solution as an outer layer; the sintering atmosphere comprises argon and oxygen, and the volume ratio of the argon to the oxygen is (2-5): 1; the first high-molecular polymer is different from the second high-molecular polymer. The battery prepared from the nanofiber-coated lithium-rich manganese-based positive electrode material prepared by the invention has excellent first effect, specific capacity, rate capability and cycle performance.

The application belongs to the technical field of electronic ceramic material manufacturing, and particularly relates to an electronic component and a sintering method thereof. The method comprises the following steps: preparing a coating on the inner wall surface of a sagger; preparing sintering powder; the coating and the sintering powder do not react with the electronic component blank in the sintering process; the blank is placed in a pretreated sagger on which the sintering powder is laid, and the sintering process is performed after the sintering powder is laid on the surface of the blank, so that the electronic component is obtained. The coating and the sintering powder do not react with the blank in the sintering process, which prevents the electronic component blank to be sintered from directly contacting the sagger such as alumina, and avoids the reaction between the blank and the sagger in the high-temperature sintering process, so that the surface of the sintered electronic component product is prevented from forming sintering holes. Meanwhile, the heating uniformity of the blank in the sintering process is improved, the blank is isolated from air, a low oxygen partial pressure atmosphere is formed, the sintering atmosphere required for product sintering is provided, and the quality of the electronic component is ensured.

The invention provides a reducing atmosphere closed-loop regulation sintering system and method based on liquid precursor in-situ cracking, and relates to the technical field of photovoltaic cell manufacturing. The system comprises a raw material supply unit, a conveying unit, a vaporization unit, a sintering unit, an online monitoring unit and a control unit, a low-boiling-point liquid precursor is vaporized in the vaporization unit and then mixed with the inert carrier gas to form a gas-phase mixture, a silicon wafer printed with metal electrode slurry is sintered in a reducing atmosphere formed by the gas-phase mixture, and dynamic controllable adjustment of sintering atmosphere composition is achieved by monitoring gas components in exhausted gas in the sintering process in real time. Therefore, high-conductivity and low-contact-resistance sintering of the metal electrode is completed at a low sintering temperature. The system and the method can effectively reduce thermal and chemical damage to the silicon wafer in the sintering process, improve the stability and repeatability of the sintering process, are suitable for continuous and large-scale production, and are particularly suitable for low-temperature sintering application of a copper electrode.

The invention discloses a target material with a high length-diameter ratio as well as a preparation method and application of the target material. The preparation method of the target material with the high length-diameter ratio comprises the following steps: 1) preparing mixture powder; 2) pre-sintering the mixture powder to obtain pre-sintered powder; 3) mixing the pre-sintered powder, a binder, a dispersant and a solvent, performing ball milling or sand milling, and then performing drying and granulation to obtain granulated particles; 4) injecting the granulated particles with different particle sizes into a mold, and forming through multi-section graded pressure boosting and maintaining to obtain a blank; and 5) sintering the blank to obtain the target material with the high length-diameter ratio. By improving the blank pressing process, the target material composition, the presintering and sintering atmosphere, the granulation particle composition, the sintering process and the like, the target material which is high in length-diameter ratio and good in uniformity, has certain conductivity and cannot burst in the electron beam bombardment process is prepared, and the preparation method is suitable for large-scale industrial production and application.

The application discloses a preparation method of a superhigh-nickel high-cycle cobalt-free positive electrode material, and comprises the following steps: S1, a nickel source, a manganese source, a complexing agent and a precipitant are prepared into a reaction solution to perform a coprecipitation reaction, so that slurry is obtained; and centrifugation, washing and drying are performed to obtain nickel-manganese hydroxide; S2, the nickel-manganese hydroxide is uniformly mixed with a lithium source and a dopant to obtain a mixture, and first sintering is performed; the oxygen concentration in a sintering atmosphere is 86%-88%, and the sintering temperature is 650 DEG C-800 DEG C; S3, the sintered material is crushed, pickled and dried; and S4, the dried material is uniformly mixed with a coating agent, and second sintering is performed. The application adjusts the cationic disordering of the material and controls the cationic disordering degree within a certain range; the internal and external lattice distortions are relatively uniform; the cycle performance is good; the capacity attenuation is more uniform; and therefore, the cycle performance of the positive electrode material is optimal.