66results about How to "Short sintering time" patented technology

The invention discloses a graphene composite perovskite manganese oxide polycrystalline ceramic and a preparation method and application thereof, and belongs to the technical field of non-refrigeration high-sensitivity infrared detection. The chemical expression of the graphene composite perovskite manganese oxide polycrystalline ceramic is La < 0.81 > (Ca < 0.03 > Sr < 0.16 >) MnO3: Gy, G is graphene, y is the mass fraction of graphene in perovskite manganese oxide composite powder, and y is equal to 0.1-0.2%. The TCR value of the prepared polycrystalline ceramic can reach 30% or above, the Tk value is close to 300K, the polycrystalline ceramic has excellent adaptability to room temperature work and excellent sensitivity to temperature change, and when the polycrystalline ceramic is applied to an uncooled infrared detector, the detection precision of the uncooled infrared detector can be effectively improved.

The invention belongs to but is not limited to the technical field of gas insulated transmission lines, and discloses a GIL three-pillar grounding electrode copper / graphite system performance optimization method and a GIL three-pillar grounding electrode copper / graphite system performance optimization system. The copper / graphite grounding electrode material is prepared based on a plasma sintering technology, the microstructure morphology, the wear resistance, the conductivity, the Vickers hardness, the heat conductivity and the density of the copper / graphite grounding electrode material are tested, and all the properties of the material are comprehensively evaluated by adopting a radar map evaluation method, so that the grounding electrode material has the considerable conductivity and also has the good wear resistance; a series of equipment faults caused by insufficient wear resistance are reduced, and the optimization of the comprehensive performance of the grounding electrode is realized.

The invention discloses a method for solid-phase regeneration of a high-homogeneity intermediate alloy from dissimilar metal chips. The method comprises the following steps that firstly, metal elementary substance chips and intermediate alloy chips are subjected to ultrasonic cleaning and drying; step 2, mixing; step 3, crushing processing; step 4, pressing; 5, pulse current assisted vacuum sintering is carried out under the pressurization condition; step 6, performing hot extrusion deformation; step 7, carrying out homogenization treatment; 8, surface oxide skin is removed; and ninthly, machining is conducted, and the granular or scrap-shaped high-homogeneity intermediate alloy is obtained. According to the method, the cost of raw materials for preparing the intermediate alloy is reduced through solid-phase recycling of the metal filing, after the metal filing is crushed and pressed, pulse current is used for assisting vacuum sintering and hot extrusion deformation, local heating and rapid pre-compounding of the filing interface are achieved, an oxidation film is crushed, and the mechanical occlusal force of the filing interface is improved; and the defect healing capacity is improved through the homogenization treatment process, and the solid-phase regenerated high-homogenization intermediate alloy with uniform components is obtained.

The invention relates to the technical field of soft magnetic ferrite materials, and particularly discloses a NiCuZn-MgO composite material and a preparation method thereof. The NiCuZn-MgO composite material comprises main components and additives, and the main components comprise the following components in percentage by weight: 36-72 wt% of Fe2O3, 13-16 wt% of ZnO, 6-9 wt% of NiO, 3-6 wt% of MgO and the balance of CuO; based on the total weight of the main components, the additive comprises the following components in percentage by weight: 0.5 to 1.5 weight percent of Bi2O3, 0.3 to 1.5 weight percent of SiO2 and 0.3 to 1.5 weight percent of CaO. According to the NiCuZn-MgO composite material prepared by the invention, the cost of soft magnetic ferrite can be reduced, and the NiCuZn-MgO composite material has high magnetic conductivity and high Bs.

The invention belongs to the technical field of photovoltaic target materials, and particularly relates to an indium titanium cerium niobium oxide ceramic target material, a preparation method and application thereof, and a transparent conductive oxide film. The indium titanium cerium niobium oxide ceramic target material comprises the following components: indium oxide, titanium oxide, cerium oxide and niobium oxide, the mass ratio of indium oxide to titanium oxide to cerium oxide to niobium oxide is 97-99: 1-0.3: 1-0.3: 1-0.2, the transparent conductive oxide film has high density, high purity and high strength, and the transparent conductive oxide film prepared from the transparent conductive oxide film has high carrier mobility, high conductivity and high light transmittance.

The invention provides a preparation method of an ErBCO superconducting target, and belongs to the technical field of oxide target materials.The preparation method comprises the steps that firstly, erbium nitrate, barium nitrate, copper nitrate, high-purity water, a dispersing agent and a binding agent are sequentially mixed, and then mixed powder is obtained through segmented ball milling and spray granulation; then the ErBCO superconducting target material is prepared through the method that the mixed powder is sequentially subjected to calcination, cold sintering and drying treatment, the effect of reducing the cost while the performance such as the density of the target material is improved is achieved through the cold sintering process, and the ErBCO superconducting target material has the advantages that the ceramic sintering temperature is remarkably reduced, and the sintering time is remarkably shortened.

The present application provides a method for preparing a nano silver powder with high sintering activity, belonging to the technical field of nano silver powder preparation. The method separates the seed crystals from the mother liquor in the crystal nucleus solution, and then stores the seed crystals in a dispersant solution. When preparing the nano silver powder later, the dispersant solution containing the seed crystals is directly poured into a silver nitrate solution, and a reducing agent solution is added dropwise, and the water bath is heated at the same time. After the reaction is complete, a flocculant is added, and the solution is washed. After freeze drying and polishing, a nano silver powder with high sintering activity can be obtained. The present invention stores the seed crystals in a dispersant solution, and the seed crystals can be stored for a long time, and the volume of the seed crystals used in the subsequent reaction to prepare the nano silver powder can be greatly reduced, and the dispersant does not need to be added again when the nano silver powder is prepared later. The present invention prepares silver powder with a particle size between 50-200nm with a simple process, and the silver powder has good dispersibility, good sintering activity, and can be sintered at a low temperature of 180°C, which can be applied to the field of low-temperature sintering nano silver paste.

The invention discloses a silicon carbide ceramic material and a preparation method thereof, and relates to the technical field of ceramics. When the silicon carbide ceramic material is prepared, firstly, apricot shell carbon, nano silicon dioxide and sodium salt are mixed and calcined in a nitrogen atmosphere, and a modified silicon carbide composite nanowire is prepared; modifying the modified silicon carbide composite nanowire and praseodymium powder by a molten salt method to prepare a praseodymium modified silicon carbide composite nanowire; liquid polycarbosilane, the praseodymium modified silicon carbide composite nanowire, a modification additive, silicon carbide particles and a sintering additive are subjected to wet ball milling, mixing and curing, and then composite sintering powder is prepared; and sintering the composite sintered powder by a spark plasma sintering method, and then annealing in an argon atmosphere to prepare the silicon carbide ceramic material. The silicon carbide ceramic material prepared by the invention has the advantages of high thermal conductivity, electromagnetic shielding, high strength and high compactness.

The invention relates to the technical field of high-specific-gravity tungsten alloy materials, in particular to a high-specific-gravity tungsten-refractory high-entropy alloy composite material and a preparation method thereof. The specific preparation method comprises the following steps that an iron-nickel phase serves as a binding phase, tungsten powder and refractory high-entropy alloy powder serve as a reinforcing phase, after the tungsten powder, the refractory high-entropy alloy powder, iron powder and nickel powder are subjected to ball milling and mixing, spark plasma sintering is conducted at the temperature of 1100-1300 DEG C, and the iron-nickel phase and the reinforcing phase are formed in the sintering process; and the high-specific-gravity tungsten-refractory high-entropy alloy composite material is prepared. According to the preparation method, a spark plasma sintering process is used, and multiple high-specific-gravity tungsten-refractory high-entropy alloy composite materials with different components, different structures and mechanical properties are prepared by changing the components and sintering process parameters of the multi-principal-element tungsten alloy; the problem that the head of an armor-piercing shell core material prepared from an existing high-specific-gravity tungsten alloy material is prone to passivation in the penetration process is solved.

The invention relates to the technical field of high-entropy alloy materials, in particular to a tungsten-based high-entropy alloy and a preparation method thereof.The preparation method comprises the following steps that W powder and auxiliary powder are mixed and ball-milled to obtain mixed powder, the auxiliary raw materials are three or more of Mo powder, Ta powder, Nb powder, Fe powder, Ni powder and Co powder, in the mixed powder, the atomic percent of the W powder is 25%-55%, and the atomic percent of the Co powder is 25%-55%; in the auxiliary raw material powder, the atomic percent of each kind of metal powder is 10%-30%, and the sum of the W powder and the auxiliary raw material powder is 100%; and the mixed powder is subjected to spark plasma sintering under the vacuum condition, the tungsten-based high-entropy alloy is obtained, and various multi-phase tungsten-based high-entropy alloys with high compactness and excellent mechanical properties are prepared through different tungsten-based high-entropy alloy component design and adjustment of spark plasma sintering parameters.

The invention relates to the technical field of silicon carbide ceramics, in particular to an in-situ induced low-temperature eutectic silicon carbide porous ceramic and a preparation method thereof. The material is prepared by mixing and sintering the following materials: silicon carbide, a synergistic sintering system, a dispersing agent, a plasticizer and water, wherein the synergistic sintering system comprises the following components: pregelatinized starch, a silicate mineral material, aluminum oxide, calcium carbonate, glass powder and rare earth oxide; the pregelatinized starch is adopted as an adhesive, the thermal decomposition behavior of the pregelatinized starch and the chemical reaction activity of the glass powder and the calcium carbonate form synergy in the process, seamless connection of the whole process from the room temperature to the sintering temperature is achieved, the sintering temperature is greatly reduced, meanwhile, the glue discharging step is omitted, and the silicon carbide porous ceramic product with good performance and few defects is obtained.

The application belongs to the technical field of powder metallurgy, and particularly discloses a nanoscale oxide particle dispersed aluminum-titanium target material and a preparation method and application thereof. x The nanoscale oxide particle dispersed aluminum-titanium target material has a double-layer structure, including a plated raw material layer and a base layer. x The plated raw material layer is composed of Al, Ti and MeO, wherein the mass percentage of Al and Ti accounts for 80-95%, and the mass percentage of MeO accounts for 5-20%; and the base layer is composed of Al and Ti or pure Al. The nanoscale oxide particle dispersed aluminum-titanium target material and the preparation method and application thereof have the advantages that the aluminum-titanium target material preparation process flow is simple, the production efficiency is high, the method is economic and environmentally friendly, and the method is suitable for batch production; the aluminum-titanium target material prepared by the method solves the binding problem of brittle target material, the target material has high density, meets the demand of hard alloy coating film plating, has no cracking problem in the plating process, and has high coating hardness and good wear resistance.

The application discloses water-permeable foamed ceramic and a preparation method and application thereof, and relates to the technical field of foamed ceramic preparation.The components of the foamed ceramic include the following raw materials: aggregate, alumina cement, foaming agent, powder, plant fiber, silane coupling agent, metal oxide and solvent.In the calcination process, the silane coupling agent is hydrolyzed, and the siloxane bond in the silane coupling agent tightly connects the plant fiber and the ceramic matrix together, the connection helps to form a solid ceramic structure, and meanwhile, the overall performance of the ceramic is improved.The silane coupling agent can improve the compatibility of the interface in the water-permeable foamed ceramic, strengthen the structure, and thus improve the stability and mechanical properties of the ceramic.

The invention discloses a texture preparation method for high-performance lead-free piezoelectric ceramics of bismuth ferrite-barium titanate. The general formula of the ceramic composition is as follows, where the molar fraction ratio of BiFeO3 and BaTiO3 is 2:1, x, y, t, and m all represent molar fractions, and 0 < x ≤ 0.05, 0 < y ≤ 0.05, 0 < t ≤ 0.05, 0 < m ≤ 0.05. In the sintering stage of the invention, a temperature gradient field is constructed to make the ceramic grains grow texture-directionally, and a textured piezoelectric ceramic with a piezoelectric constant d 33 reaching above 1000 pC / N at 350 °C and a T dr reaching above 350 °C is obtained. The preparation process of the invention is simple, and the prepared ceramic has excellent high-temperature performance and can be applied to the field of high-temperature piezoelectricity.

This invention belongs to the field of semiconductor device fabrication technology and discloses a method for fabricating high-temperature, high-power-density SiC power semiconductor devices. The invention has low equipment requirements: due to the short sintering time, few sintering cycles, and all planar sintering, a common hot press and heating table can be used for sintering in air, eliminating the need for expensive nitrogen-filled pressurized silver sintering furnaces. The process is simple and fast: only two sintering cycles, two welding cycles, one bonding cycle, and one potting cycle are needed to complete the fabrication of a double-sided cooled 250°C high-temperature SiC power semiconductor device, including a heat dissipation base plate and insulating potting. A low-cost solution for 250°C high-temperature applications: expensive materials such as nano-silver are used only in some key locations. Utilizing thermal diffusion characteristics, high-temperature solder is used instead of nano-silver at the heat dissipation base plate-substrate welding interface where heat flow is fully diffused. This avoids the problems of high difficulty and high material cost associated with large-area silver sintering without significantly reducing heat dissipation performance.

This invention belongs to the field of optoelectronic material preparation technology, specifically relating to a Mg-doped C12A7 translucent ceramic and its preparation method. The method includes the following steps: mixing a calcium-containing precursor, an aluminum-containing precursor, and a magnesium-containing precursor in a specific molar ratio; ball milling the mixture in anhydrous ethanol; drying and sieving to obtain (Ca... 1‑x Mg x )12A7 precursor powder; the (Ca 1‑x Mg x )12A7 precursor powder was pressed and subjected to cold isostatic pressing to obtain (Ca 1‑x Mg x )12A7 precursor block; the (Ca 1‑x Mg x The Mg-doped C12A7 precursor block is placed in an oxygen atmosphere and heated to the target sintering temperature for pressureless sintering to obtain Mg-doped C12A7 ceramic. This invention significantly simplifies the process flow, reduces the complexity and cost of preparation, and effectively achieves high densification of the ceramic.

The invention relates to a preparation method of zinc sulfide optical transparent ceramic, and belongs to the technical field of new materials. The preparation method comprises the following steps: weighing beta-ZnS nano-powder of a cubic sphalerite crystal phase as a raw material; preparing an alkali metal halide salt additive and a metal sulfide additive; mixing the weighed raw materials with the two additives to prepare precursor powder of the zinc sulfide transparent ceramic; the mass ratio of the alkali metal halide salt additive is 3.0 wt.%-7.0 wt.% of the total mass of the beta-ZnS nano powder; the mass ratio of the metal sulfide additive is 0.0 wt.%-5.0 wt.% of the total mass of the beta-ZnS nano powder; and putting the precursor powder of the zinc sulfide transparent ceramic into a high-temperature sintering mold, carrying out hot pressed sintering in a vacuum environment or a protective gas environment, and cooling to obtain the zinc sulfide infrared optical transparent ceramic without the hexagonal wurtzite crystal phase. According to the invention, the problem that the nano-size of the nano beta-ZnS powder induces low-temperature phase change is solved, and the zinc sulfide transparent ceramic prepared by hot pressing does not contain hexagonal sphalerite alpha-ZnS impure phase.

This invention discloses a low-temperature, rapid sintering method for preparing sodium molybdenum ceramic targets. Specifically, molybdenum trioxide powder and sodium molybdate dihydrate powder are first mixed using alcohol as a medium through ball milling to obtain a sodium molybdenum slurry. The slurry is then dried, filtered, ground, and sieved to obtain sodium molybdenum powder. The sodium molybdenum powder is then wetted with ammonium molybdate solution. The wetted sodium molybdenum powder is placed in a graphite mold for pre-pressing. The pre-pressed green body is then placed in a sintering furnace along with the graphite mold and subjected to spark plasma-assisted cold sintering at 200℃~400℃ and 50 MPa high pressure to obtain a sintered target body. The sintered body is then mechanically polished and ultrasonically vibrated to obtain a semi-finished target. The semi-finished target and a copper backing plate are brazed together, and after cleaning, drying, and vacuum sealing, the sodium molybdenum ceramic target is obtained. This invention enables the rapid (5 min) sintering of high-purity, high-density sodium molybdenum ceramic targets at low temperatures.

The invention discloses red and blue LED fluorescent powder for plant growth and a preparation method of the red and blue LED fluorescent powder. The chemical composition of the fluorescent powder is Na2Zr1-x-y (WO4) 3: xNi < 2 + > and yFe < 2 + >, x is the concentration of doped Ni < 2 + > and is equal to 0.01-0.1, and y is the concentration of doped Fe < 2 + > and is equal to 0.01-0.1. The fluorescent powder can emit 400-500nm high-intensity blue light and 660-700nm red light under the excitation of 320-360nm ultraviolet light, and can effectively promote the growth and development of plants corresponding to absorption spectrums of various pigments in the growth and photosynthesis of roots, stems and leaves of the plants. The raw materials of the fluorescent powder are all non-rare earth materials, so that the cost is low; the fluorescent powder is small in particle size, uniform in particle and high in luminous intensity; the raw materials and the product are non-toxic and environment-friendly, and are potential novel luminescent materials in the field of plant lighting LEDs.

The application belongs to the field of ceramic powder preparation, and discloses a method for in-situ preparation of high-performance TiB2-B4C composite ceramic from sapphire fine grinding waste. The method uses the waste produced in the sapphire grinding process as raw material (B4C, Al2O3 and Fe), adds TiO2 and C after alkali washing and purification, and combines with the discharge plasma sintering to in-situ prepare TiB2-B4C composite ceramic. The method not only realizes the comprehensive recovery of B4C in the sapphire fine grinding waste slurry, reduces environmental pollution, but also provides a method for in-situ preparation of TiB2-B4C composite ceramic from waste, changes waste into treasure, and realizes the secondary use of resources. In addition, the raw material cost is low, and the method has obvious economic value and environmental protection significance. The method has the advantages of short process, small pollution, simplicity and the like, and can be used for industrial production.

The invention relates to the technical field of solid waste treatment, in particular to a method for preparing aluminate cement clinker by calcining secondary aluminum ash. Crushing and ball-milling limestone, mixing with the calcined secondary aluminum ash, raw bauxite and fly ash, ball-milling to obtain a raw material with the particle size of more than or equal to 200 meshes, and calcining the sieved raw material at 1000-1450 DEG C for 1-3 hours to obtain the aluminate cement clinker. And then the regulator and the water reducing agent are added, so that the problems that the strength is reduced and the strength forming of the aluminate cement needs a higher water-cement ratio due to the fact that metastable-state hydrated calcium aluminate is converted into a stable state in the later stage of hydration of the aluminate cement are solved. According to the present invention, the calcined secondary aluminum ash is adopted as the raw material, such that the components are cleaner, the performance is more stable, the resource recycling can be achieved, the sintering time and the coagulation time of the aluminate cement clinker can be reduced, the aluminate cement clinker contains a large amount of active Al2O3 and SiO2, the mechanical property is significantly improved through the hydration reaction, and the cement paste has strong breaking strength and strong compression strength.

A method for preparing gradient cemented carbide based on differentiated ball milling and using pre-alloyed cobalt-nickel as the binder phase includes the following steps: (1) preparation of pre-alloyed cobalt-nickel binder powder; (2) preparation of surface mixed powder; (3) preparation of core mixed powder; (4) spark plasma sintering. This invention pre-alloys Co powder and Ni powder, which is beneficial for improving the compositional uniformity and distribution uniformity of the CoNi binder phase, and for ensuring stable distribution of the binder phase during sintering; differentiated ball milling of the surface layer and core layer establishes the interlayer structure basis of the gradient cemented carbide from the powder source; the gradient structure gives the surface layer higher hardness and wear resistance, and the core layer better toughness and crack resistance, achieving a unified matching of high surface hardness and high core toughness; densification is achieved by pre-pressing combined with spark plasma sintering, resulting in a gradient cemented carbide with clear layered structure characteristics and excellent comprehensive service performance.

The application discloses a tungsten / molybdenum alloy prepared by in-situ dehydrogenation and deep deoxidization of hydride and a method thereof, and particularly relates to the following steps: tungsten / molybdenum alloy powder and metal hydride are fully mixed according to a hydride addition amount of 1% to 10% of the total mass of the tungsten / molybdenum alloy powder, then the mixture is pressed into a compact, the compact is placed into a sintering furnace, vacuum in the furnace is extracted, the sintering furnace is heated for vacuum degassing, after the first removal of free oxygen and water vapor in the compact is completed, dry hydrogen is introduced into the sintering furnace and the sintering furnace is heated, under the action of negative pressure, hydrogen enters the voids in the compact, after the second removal of oxygen in the compact is completed, the sintering furnace is continuously heated in a stepwise manner and is kept warm, the temperature is increased to above the dehydrogenation temperature of the metal hydride, the third in-situ dehydrogenation and deep deoxidization of the hydride is completed, and finally the sintering furnace is cooled to obtain a low-oxygen tungsten / molybdenum alloy. The preparation method is simple, the deoxidization efficiency is high, the sintering grain can be significantly refined, the oxygen content in the alloy can be reduced, and the material performance can be improved.

The invention relates to a solid oxide fuel cell and a preparation method thereof, and the preparation method comprises the following steps: coating one side surface of an electrolyte substrate with first electrode slurry, carrying out primary sintering, coating the other side surface of the electrolyte substrate with second electrode slurry, and carrying out secondary sintering to obtain the solid oxide fuel cell, the first electrode slurry comprises anode slurry, and the second electrode slurry comprises cathode slurry; or, the first electrode slurry comprises cathode slurry, and the second electrode slurry comprises anode slurry. According to the invention, the problem that the electrolyte supported solid oxide fuel cell is easy to break in the testing process is solved by reducing the warping degree of the electrolyte supported solid oxide fuel cell through stepped sintering, simplifying the sintering process, optimizing the glue discharging process and shortening the sintering time, and meanwhile, the composite oxide anode powder with uniform components is prepared by utilizing a coprecipitation method; furthermore, the particle size of the powder prepared by the coprecipitation method is smaller, and the subsequent grinding strength is reduced.

The invention belongs to the technical field of hard alloys, and particularly relates to a high-wear-resistance tungsten steel alloy and a preparation method thereof. The raw materials of the high-wear-resistance tungsten steel alloy comprise WC, Al-Sn-B nanometer oxide and a SiN / GO toughening phase, the tungsten steel alloy is designed to be of a gradient structure, the surface layer has hardness and wear resistance, the inner layer has good fracture toughness, WC is the main hard phase in the tungsten steel alloy, extremely high hardness and wear resistance are provided, and the high-wear-resistance tungsten steel alloy can be used for manufacturing the high-wear-resistance tungsten steel alloy. The Al-Sn-B nano oxide is added to form a sintering aid, so that the diffusion mass transfer process of WC in high-temperature solid-phase sintering is enhanced, the densification of the tungsten steel alloy is accelerated, and the fracture toughness of the tungsten steel alloy is improved by adding the SiN / GO toughening phase and utilizing a graphene toughening mechanism; the prepared high-wear-resistance tungsten steel alloy has excellent wear resistance and high-temperature oxidation resistance, and good toughness, strength and bending resistance.

The invention discloses a preparation method of simulated spent fuel, which comprises the following steps: mixing uranium dioxide powder, simulated fission product metal compound powder and an organic solvent according to a certain proportion, uniformly mixing by wet ball milling to obtain simulated spent fuel mixed slurry, and drying and sieving the slurry to obtain simulated spent fuel powder. Finally, the obtained simulated spent fuel powder is subjected to compression molding and spark plasma sintering in sequence, and the simulated spent fuel is prepared. A discharge plasma rapid densification sintering technology is adopted, the sintering temperature of the simulated spent fuel can be reduced, the sintering time is remarkably shortened, the sintering efficiency is improved, the problem that elements with different properties volatilize inconsistently is effectively avoided, quantitative doping of volatile fission elements is achieved, and the performance of the spent fuel is improved. And the obtained simulated spent fuel element composition is closer to the real spent fuel composition. Meanwhile, the preparation method of the simulated spent fuel avoids the use of reducing atmospheres such as hydrogen and the like, so that the safety performance of the sintering process is remarkably improved.

The invention discloses a rapid high-temperature sintering method for compact block functional ceramic, and the rapid high-temperature sintering method provided by the invention comprises the following steps: raw material pretreatment, burdening, pre-sintering, mixing, tabletting and rapid sintering. The lead zirconate titanate-based and potassium-sodium niobate-based piezoelectric ceramic has the advantages that the sintering time is obviously shortened, element volatilization and crystal grain growth are inhibited, the compact sintering of the lead zirconate titanate-based and potassium-sodium niobate-based piezoelectric ceramic is successfully realized, and the piezoelectric strain constants (d33) of PZT-1, PZT-2, KNN-1 and KNN-2 respectively reach 623, 334, 161 and 160pC / N. In addition, due to the small grain size and the compact structure, the dielectric loss is remarkably reduced, and meanwhile, the mechanical strength of the material is improved; the rapid high-temperature sintering method provided by the invention has the characteristics of low energy consumption, high efficiency and environmental protection.

The utility model discloses an ultra-high temperature lithium ion battery cathode material sintering roller kiln which comprises a kiln channel, the kiln channel is arranged in a penetrating mode from front to back, a row of horizontal roller bars are installed in the kiln channel in a rotating mode, brake bowls capable of moving front and back are arranged on the roller bars, and an inlet replacement area is arranged in front of the kiln channel. An outlet replacement area is arranged behind the kiln channel; a heating section, a constant temperature section and a cooling section are sequentially arranged in the kiln channel from front to back; according to the utility model, a negative electrode material to be sintered is placed in the brake bowl, then the brake bowl containing the negative electrode material is moved to the sintering area along the roller rod, and is heated by the silicon carbide rod in the corundum tube, so that the temperature in the sintering area is increased, and the purpose of sintering the negative electrode material in the brake bowl is achieved; and heat in the kiln channel is slowly dissipated, so that the temperature rise speed of the sintering area is increased, the sintering time of the negative electrode material is shortened, and the sintering speed of the negative electrode material is increased.

This invention discloses a method for preparing beryllium-aluminum alloy composite materials, belonging to the field of alloy composite material technology. The method includes: uniformly mixing beryllium powder with an average particle size of less than 18 μm and aluminum powder with an average particle size of less than 48 μm at a mass percentage of 56-66% and 34-44%, respectively, and then loading the mixture into a mold; placing the mold containing the mixed powder into a sintering furnace and performing vacuum pressure-activated sintering to obtain a beryllium-aluminum sintered ingot; and subsequently performing peeling and mechanical processing on the beryllium-aluminum sintered ingot. This invention's method can suppress the growth of beryllium-aluminum alloy particles, resulting in fine and uniform grains, high interfacial bonding strength, good product performance, uniform heating, rapid heating rate, low sintering temperature, short sintering time, and high production efficiency.