48 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 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.

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 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 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.

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.

A preparation method for a modified high-nickel ternary positive electrode material, comprising the following steps: providing a high-nickel ternary positive electrode material and aluminum diethylphosphinate, wherein lithium carbonate is attached to the surface of the high-nickel ternary positive electrode material; providing a sintering device, wherein the sintering device is filled with a sintering atmosphere; mixing the high-nickel ternary positive electrode material and the aluminum diethylphosphinate; and putting the mixed high-nickel ternary positive electrode material and aluminum diethylphosphinate into the sintering device to perform sintering, wherein the sintering temperature is 500-800℃, the sintering duration is 2-20 h, and the heating rate is 0.5-5℃ / min, so as to prepare a high-nickel ternary positive electrode material having a coating layer, wherein the coating layer is formed by aluminum phosphate and lithium phosphate. A stable interfacial layer, i.e., the coating layer, is constructed on the surface of the high-nickel ternary material, and the coating layer is formed by aluminum phosphate and lithium phosphate, so that the problem of crystal structure degradation of the high-nickel ternary material in the cycle process can be effectively mitigated, thereby effectively prolonging the cycle life.

The invention provides a black Tang new flower double-layer glazing and controllable redox firing process, which comprises the following steps: respectively grinding a ground glaze material and a surface glaze material to specified fineness, sequentially applying the ground glaze material and the surface glaze material to the surface of a porcelain blank, after the glaze surface is dried, putting the blank into a kiln, firing for a certain time in a controllable redox atmosphere, and slowly cooling to obtain a final product, the ground glaze material is prepared from the following components in parts by mass: 40 to 45 parts of yellow surface stone, 10 to 15 parts of raw medicine, 10 to 13 parts of quartz sand, 10 to 15 parts of calcite, 5 to 8 parts of copper ore, 0.6 to 0.75 part of ferric oxide, 1.5 to 2 parts of talcum powder and 1 to 1.25 parts of bovine bone ash; through the technical scheme, the problems of insufficient glaze matching precision, single glazing process, uncontrollable sintering atmosphere and the like in the prior art are solved, the texture, the texture effect and the color development stability of the black Tang new flower Jun porcelain glaze surface are improved, and the high requirements of high-end ceramic artworks on the glaze color and the texture are met.

1. The name of the design product: tube furnace (STF). 2. The use of the design product: for high-temperature atmosphere sintering, atmosphere reduction, CVD experiment, vacuum annealing, etc. high-temperature processing. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The application discloses a Ti-O electronic compound, a lithium-sulfur battery electrode material and a preparation method and application thereof, and belongs to the technical field of electrode material preparation. The preparation method is as follows: (1) uniformly mixing Ti powder and TiO2 powder according to the stoichiometric ratio of Ti and TiO2; (2) under the condition of 150-250 MPa, compressing the mixed powder obtained in the step (1) to obtain a sintered body; (3) wrapping the sintered body with Ti powder, and then performing high-temperature sintering, and cooling after the sintering is completed to obtain the Ti-O electronic compound. The application provides a simple preparation method for synthesizing the high-purity Ti-O electronic compound, and a lithium-sulfur battery positive electrode based on the Ti-O electronic compound as a catalytic carrier is prepared. By controlling key parameters such as powder particle size, compacted density, sintering atmosphere and temperature, the Ti-O electronic compound is realized to be embedded and sintered at high temperature to prepare a lithium-sulfur battery sulfur positive electrode with high rate performance.

The present application relates to a kind of lithium iron phosphate material, the lithium iron phosphate material has typical olivine structure, belongs to orthorhombic space group Pnma, the preparation method of the lithium iron phosphate material, comprising the following steps: (1) lithium carbonate of battery grade, boric acid, magnesium hydroxide are mixed uniformly according to certain proportion with iron phosphate, carbon source, wherein, n1 lithium carbonate: n2 iron phosphate is 1~1.02:1, the addition amount of carbon source is 10~15% of total weight, boric acid, magnesium hydroxide as additive, the content of boric acid, magnesium hydroxide is 0~2%, obtain mixture S1;(2) S1 is placed into fine grinder and is finely ground, speed 20~50r / min;Time 0.5~1h, obtain D50 particle size 0.5~0.6 μm mixed product S2;(3) S2 is sprayed in spraying equipment, obtain product S3, in roller hearth kiln sintering, sintering temperature is 650~800 DEG C, sintering atmosphere is inert gas, sintering time is 1~8h, obtain product as S4.By adding low melting point substance boric acid and magnesium hydroxide, it is conducive to sintering reaction LiFePO4 Crystal growth.

The present application discloses a furnace atmosphere control device and method. The furnace atmosphere control device includes an adjustment device, a sensor system, and a control unit. The exhaust unit in the adjustment device is configured with a cover plate, a connecting rod, a crank, and an actuator, wherein the connecting rod is used to push and pull the cover plate to move, changing the position of the cover plate, thereby changing the area of the outlet of the exhaust unit. The furnace atmosphere control device of the present application enables the sintering atmosphere within the calcination furnace to be maintained at a high oxygen concentration, and can maintain continuous fluctuations in furnace pressure, ensuring the calcination effect of the raw cathode materials. The furnace atmosphere control method of the present application achieves automatic and real-time adjustment, being safe and efficient.

The utility model discloses a boat for sintering hard alloy, which comprises a plurality of flat boats which are stacked up and down, and a plurality of positioning holes are arranged on four sides of each flat boat. The connecting piece is limited in the positioning hole and comprises a positioning part and a bearing part arranged at the top end of the positioning part, the bearing part is located above the positioning hole, and an inserting groove is formed in the upper surface of the bearing part; when the plurality of flat boats are arranged in parallel up and down, the bottom of the upper positioning part in every two adjacent layers is vertically inserted into the slot of the lower bearing part, so that a sintering space without edges on the periphery is reserved between the two adjacent layers of flat boats; according to the utility model, the plurality of layers of boats are sequentially stacked up and down through the fasteners on each layer, so that the space without edges on the periphery is beneficial to gas circulation during sintering, the sintering atmosphere is more uniform, and the product quality and uniformity are improved; and when products with different thicknesses are sintered, only connecting pieces with different thicknesses need to be replaced, so that the production efficiency is high, and the production cost is reduced.

The invention provides a sintering furnace. The sintering furnace comprises a hearth, a heat preservation layer and a furnace shell which are sequentially arranged at intervals from inside to outside. A first space is formed between the heat preservation layer and the furnace shell. A second space is formed between the heat preservation layer and the hearth. The sintering furnace further comprises an air pressure balancing device, the air pressure balancing device comprises an air guide pipe, and the air guide pipe penetrates through the heat preservation layer and enables the first space to communicate with the second space through the air guide pipe, so that airflow in the first space flows into the second space from the air guide pipe. Therefore, the problem that in a sintering furnace in the prior art, gas scours the heat preservation layer, the heat preservation layer is pulverized easily, and then the sintering atmosphere is polluted is solved. And the cleanliness of the atmosphere during sintering is improved, so that the sintered product contains fewer impurities, and the mechanical property is higher. And the service life of other parts between the heat preservation layer and the hearth is prolonged, and the use and maintenance cost of the sintering furnace is reduced.

A method (100) of obtaining a full-density sintered titanium component can include providing (110) a titanium component having a starting density of 92% or less. The titanium component can be heated to and held at a sintering temperature (120) under a sintering atmosphere containing hydrogen with a pressure during sintering less than 0.2 MPa. This can sinter (130) the titanium component to greater than 92% theoretical density forming a sintered component. The sintered component can be held (140) at a densification temperature while applying a gaseous pressure of 0.2 MPa to 100 MPa with a densification atmosphere, to hot isostatically press (HIP) the sintered component to full density having greater than 99.5% relative density to form the full-density sintered titanium component.