19results about How to "Promote sintering" patented technology

The invention discloses a processing method for a copper-clad ceramic substrate, which relates to the technical field of copper-clad ceramic substrate processing, and comprises the following steps of: taking a pre-treated copper-clad ceramic substrate, introducing nitrogen, and carrying out layered progressive micropore processing on an exposed aluminum oxide ceramic substrate of the pre-treated copper-clad ceramic substrate through picosecond laser to form micropores; each micropore is divided into an inlet layer, a middle layer and an outlet layer from top to bottom; the layer number of the micropores, the thickness of each layer of the micropores and the pulse width are controlled, and a light spot and long-focal-depth lens is adopted; adjusting monopulse energy and frequency parameters of picosecond laser, and punching an inlet layer; adjusting monopulse energy and frequency parameters of picosecond laser, and punching the middle layer; and adjusting monopulse energy and frequency parameters of the picosecond laser, and punching the outlet layer to obtain the copper-clad ceramic substrate. In the middle layer, the monopulse energy is gradually increased, and it is ensured that the material is evenly removed; at the inlet layer and the outlet layer, energy is reduced, and cracks caused by stress generated instantly when the material is punctured are avoided.

The present application relates to the field of composite ceramics, and aims to provide a new B4C-cBN composite ceramic with good mechanical properties and thermal conductivity, and a preparation method thereof, which comprises the following steps: S100, mixing boron carbide 5-9 parts, cubic boron nitride 1-5 parts and sintering additives to obtain a mixture; S200, obtaining the B4C-cBN composite ceramic through a sintering process; the sintering temperature is 1400-1550 DEG C; the sintering pressure is 4.9-5.5 GPa; and the sintering time is 1-3 h. The reason why aluminum and cobalt are selected as sintering additives is that the melting point of aluminum is low, and a liquid phase formed in the sintering process can effectively fill the pores through capillary action, thereby promoting the sintering process. Aluminum reacts with cubic boron nitride to form aluminum nitride, which can inhibit the conversion of cubic boron nitride into hexagonal boron nitride. Cobalt has oxygen affinity and can play a purifying role of "deoxidation and degassing", thereby reducing pores, improving density and improving the sintering performance of the composite ceramic. The optimal raw material ratio and sintering parameters are determined, so that the mechanical properties and thermal conductivity of the composite ceramic are both excellent.

The application relates to the technical field of ceramics and energy storage, in particular to a Li-La-Zr three-site co-doped garnet solid electrolyte ceramic and a preparation method and application thereof, the chemical formula of the Li-La-Zr three-site co-doped garnet solid electrolyte ceramic is Li 6.25 (Ga 0.25 )La 2.5 (Sr 0.5 )Zr 1.5 (Ta 0.5 )O 12 The Li-La-Zr three-site co-doped garnet solid electrolyte ceramic provided by the application has high ionic conductivity and excellent air stability, and can improve the cycle stability and rate performance of a solid-state battery.

The application provides an alumina ceramic membrane support with high thermal shock resistance, characterized in that the support is prepared by mixing raw materials of alumina, NTE oxide and pore-forming agent, binder, plasticizer, lubricant and water, pugging, extrusion and calcination; the mass ratio of the alumina, NTE oxide and pore-forming agent in the mixed powder is 75-98:2-10:0-15; the binder is 3-10% of the total mass of the mixed powder; the plasticizer is 1-3% of the total mass of the mixed powder; the lubricant is 0.1-2% of the total mass of the mixed powder; and the water is 10-30% of the total mass of the mixed powder. By introducing molybdate with near-zero / negative thermal expansion coefficient, the alumina ceramic membrane support with ultra-low or near-zero thermal expansion coefficient is prepared, so that the thermal shock resistance of the alumina porous ceramic support is significantly improved; the NTE oxide of molybdate can also be used as a sintering aid of alumina to promote the sintering of the alumina support; in addition, the NTE oxide has good acid and alkali corrosion resistance, and the prepared alumina ceramic membrane support has excellent mechanical properties and corrosion resistance, and can be used in the fields of high temperature and high pressure and gas-solid separation.

This invention discloses an alumina-based catalytic ceramic membrane loaded with a high content of iron oxide, its preparation method, and its application, belonging to the technical field of inorganic functional ceramic microfiltration membranes and their preparation. This invention solves the problems of low catalyst loading limiting the catalytic activity of existing catalytic ceramic membranes, as well as the complex and costly preparation processes. In preparing the alumina-based ceramic membrane, this invention adds silica to generate a liquid phase during sintering to promote sintering, and adds the catalyst α-Fe₂O₃ to the ceramic powder before sintering. A one-step co-sintering method is used to prepare a ceramic membrane with catalytic function, simplifying the preparation process while increasing the α-Fe₂O₃ content on the surface and inside of the ceramic membrane, utilizing Fe… 3+ It activates the crystal lattice and promotes sintering. Furthermore, with the increase of α-Fe2O3 addition, small pores are expelled during sintering, pore walls shrink, large pores are generated, the pore size of the ceramic membrane gradually increases, and the permeation flux of the ceramic membrane is improved.

The utility model belongs to the technical field of refractory metal preparation, and particularly relates to a device for preparing refractory metal powder through layered reduction, which comprises a reactor, a heater and a tray, diluted salt and a reducing agent are laid in the reactor, refractory metal oxide raw materials are contained in the tray, and the tray can be submerged in the reducing agent or the diluted salt in a lifting mode. The top of the reactor is connected to vacuum equipment through a vacuumizing pipe; a gas inlet and a gas outlet which are used for introducing inert gas into the reactor and discharging inert gas from the reactor are also formed in the top of the reactor. The device also provides a new preparation mode for tantalum powder, reduction is carried out for a certain time in the upper magnesium melt, the influence of diluted salt in the reduction process is eliminated, and the product structure is not damaged; and then entering a lower layer diluted salt molten salt system, and preserving heat for a period of time, so that the surface activity of tantalum powder particles can be improved, the impurity content is reduced, the growth and sintering of small particles are promoted, and the particle uniformity and pore structure are improved.

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.

This invention discloses a batching process for producing autoclaved aerated concrete (AAC) bricks. In this invention, secondary acid-washed brown corundum, primary alum, and dense white corundum are added to the raw materials for AAC brick production. This improves the impact resistance of the resulting AAC bricks and makes their surface smoother and more aesthetically pleasing, thus enhancing the overall appearance and durability of the bricks during use. Furthermore, the addition of calcium lignosulfonate solution to these raw materials promotes phase transformation and sintering, reducing firing time and increasing firing speed. This allows the method to be suitable for large-scale production, improving economic efficiency. The addition of wear-resistant agents to the anti-corrosion powder enhances the corrosion resistance and wear resistance of the concrete bricks, extending their normal service life.

This invention relates to a conductive silver paste-specific glass powder for automotive rear window defroster lines, its preparation method, and its application. The glass powder comprises the following components in the indicated mass ratios: Bi₂O₃: 45-65%, SiO₂: 15-30%, B₂O₃: 5-12%, Al₂O₃: 1-5%, K₂O: 2-8%, Li₂O: 1-5%, CaO: 0.5-3%, and Sb₂O₃: 0.5-3%. It is processed according to the following steps: raw material selection, pretreatment, precise mixing, high-temperature melting, rapid water quenching, fine processing, and grading. Compared with existing technologies, this invention has advantages such as adaptability to high-temperature short-time sintering, high acid resistance, low sheet resistance, high welding strength, and high adhesion.

The present application belongs to the technical field of packaging process, and particularly relates to a patch adhesive and a patch process thereof. The patch adhesive comprises the following components in percentage by weight: solvent 20-70%, resin 1-20%, and activator 20-70%. The patch adhesive prepared by the present application has good adhesive force and wettability, and the prepared adhesive has the characteristics of complete volatilization and decomposition at low temperature (220 DEG C), and will not remain on the adhesive surface, thereby avoiding the adverse effects on the conductivity, thermal conductivity, shear strength and reliability of metal bonding. The application of the patch adhesive in the patch process of the joining technology can effectively expand the volatilization channel of the nano sintering paste, and realize the improvement of the conductivity, thermal conductivity, shear strength and reliability of metal bonding.

The application relates to the field of nano-sintering electronic packaging technology, and provides a production device and method for chip sintering interconnection. The device comprises a workbench, a mold, a fixing mechanism, a dispensing mechanism and a hot press. The workbench is suitable for laying a heat-resistant film. The mold is provided with a paste injection hole. The fixing mechanism is used for fixing the mold and is suitable for driving action through a first driving mechanism to move the mold above the heat-resistant film. The dispensing mechanism is used for injecting solder paste into the paste injection hole and is suitable for driving action through a second driving mechanism to move the dispensing mechanism above the mold. The hot press is used for hot-pressing the solder paste to form a soldering sheet and sintering a chip, the soldering sheet and a circuit board into a shape. The hot press is suitable for driving action through a third driving mechanism to move the hot press above the mold.

The application discloses a converter steel slag tailing sintering utilization method, wherein steel slag tailing with a particle size range of 0-10 mm is air-dried for 5-10 days to reduce the water content to below 7%; the air-dried steel slag tailing is further classified into steel slag tailing with a particle size of >5 mm and <5 mm; the steel slag tailing with a particle size of <5 mm is dried to a water content of below 2% and is sent to a ball mill to be ground into steel slag tailing with a particle size of <3 mm; after magnetic separation, non-magnetic steel slag tailing with a particle size of <3 mm is obtained and is uniformly mixed with biomass fuel at a mass ratio of (18-20):1; the obtained steel slag tailing with a particle size of >5 mm, the non-magnetic steel slag tailing obtained in step (3) and the biomass fuel mixture, mixed ore, sintering flux, return ore and fuel are fully mixed at a proper ratio to obtain sintering mixture for producing sintered ore; the application overcomes the adverse effects of adding steel slag in the sintering process and has the product advantages of high strength, low energy consumption and low cost compared with conventional methods; and the application provides a method for recycling converter steel slag tailing.

The application discloses a fireproof power cable, which comprises a core conductor in an inner layer and a protective layer in an outer layer; the core conductor comprises at least two conductors with different diameters, the conductors with different diameters are arranged in sequence clockwise or counterclockwise, and an oxygen isolation filling layer is filled between the core conductor and the outer protective layer; the protective layer comprises, in sequence from inside to outside, a heat insulation layer, an oxygen isolation inner protective layer, a steel belt armored layer, a fire-resistant and flame-retardant layer and an outer sheath. In use, the cable has a B1-level combustion performance, and additional classification meets the requirements of d0, t0 and a1, so that the cable has a flame temperature of not less than 750 DEG C under a rated working voltage, and a fuse is not broken within 90 min of fire supply time.

The application discloses a preparation method of a high-temperature alloy, which comprises the following steps: (1) mixing high-temperature alloy raw material powder with a granulating agent to perform granulation to obtain granulated raw material; and (2) under vacuum conditions, the granulated raw material is sintered by using oscillation hot pressing, and during sintering, an alternating load is adopted to control the grain growth process, so that the high-temperature alloy is obtained. The preparation method of the high-temperature alloy first performs granulation on alloy powder, and then controls the grain growth process of the product by controlling the alternating load of the oscillation hot sintering process, so that the grain refinement is facilitated, the fine-grain strengthening effect is generated, and the mechanical properties of the high-temperature alloy product are greatly improved. In addition, through the mutual synergistic effect of the granulation and the alternating load, the compactness of the product can be improved.

This invention relates to the technical field of ceramic materials, specifically to a high-strength, high-thermal-shock-resistant ceramic material, its preparation method, and its applications. This application discloses a high-strength, high-thermal-shock-resistant ceramic material comprising the following components by weight percentage: Al2O3: 92-96%, SiO2: 1-5%, CaO: 0.5-1.5%, MgO: 0.05-0.5%; the high-strength, high-thermal-shock-resistant ceramic material has a cross-section with micropores of 5-30 μm and a porosity of 1%-3%. The high-strength, high-thermal-shock-resistant ceramic material of this application improves the thermal shock resistance of alumina ceramics by adding appropriate amounts of sintering aids, pore-forming agents, and dopant phases; simultaneously, through a specific glass-alumina reaction, the sintering temperature is lowered to promote sintering, and the alumina particles are wetted, enhancing the grain boundary bonding strength; furthermore, the addition of cordierite, with its low coefficient of thermal expansion, adjusts the coefficient of thermal expansion of the material, further improving its thermal shock resistance.

The invention relates to a preparation method of high-porosity ceramic with controllable pore diameter and structure. The preparation method comprises the following steps: taking the following raw materials in percentage by mass: 85-95% of alpha-powder, 0.5-5% of carbon black, 3-6% of camphor, 0.5-2% of powder and 1-3% of MgO powder; mixing and pretreatment: spheroidizing the raw materials by taking absolute ethyl alcohol as a medium to obtain slurry, and drying and sieving the slurry to obtain composite ceramic powder; molding: performing dry pressing molding on the composite ceramic powder to obtain a green body; and rubber discharging and sintering are conducted, specifically, the green body is placed in a high-temperature sintering furnace, heat treatment is conducted under the air atmosphere, and the heat treatment is divided into four steps including the stepped rubber discharging stage, the pre-sintering stage, the final sintering stage and the cooling stage.

The application discloses a kind of titanium alloys, the titanium alloy is obtained by titanium alloy powder injection molding;Wherein, the titanium alloy powder includes: titanium alloy ball and TiB2 layer, polyamine layer, graphene oxide layer successively coated on the surface of titanium alloy ball, and the graphene oxide layer contains cerium element.The application also discloses a preparation method of the above-mentioned titanium alloy, comprising the following steps: taking titanium alloy powder and binder mixing, injection molding, degreasing, vacuum sintering at 1000-1100 DEG C for 2-3h, cooling to room temperature, solid solution at 700-720 DEG C for 40-60min, air cooling to room temperature, then heat preservation at 450-470 DEG C for 3-3.5h, and then air cooling to room temperature, to obtain titanium alloy.The titanium alloy has good strength while maintaining good toughness.

The application relates to a silver-coated copper particle, a preparation method thereof and application of the silver-coated copper particle in sintering paste, and belongs to the field of sintering materials. The application solves the problem of high sintering temperature of high-temperature solder in the prior art. The silver-coated copper particle is prepared by a multi-step chemical synthesis method, that is, silver-coated copper particle suspension is prepared first, and then a silver complex solution, a second chelating agent solution and a complexing agent solution are used to realize gradient structure evolution of the silver layer from compact to porous by controlling the release and reduction rate difference of silver ions, the surface of the silver-coated copper particle has a multi-stage pore structure, the contact resistance between particles can be effectively reduced, the sintering starting temperature can be effectively reduced, the poor oxidation performance of copper particles is solved, the silver consumption is reduced, the manufacturing cost is reduced, the ion migration path length and the electromigration life are increased, the silver-coated copper particle prepared by the application greatly meets the requirements of the electronic packaging field for new welding materials, and has remarkable social and economic benefits.

The application discloses a sintering method of silver-copper thick film conductor paste for ceramic substrate surface, which comprises the following steps: S1, applying silver-copper thick film conductor paste on the surface of a ceramic substrate and air-drying; S2, placing the air-dried ceramic substrate obtained in step S1 in an atmosphere at 400-500 DEG C for 1-2 hours to remove the organic carrier in the silver-copper thick film conductor paste; and S3, reducing the ceramic substrate obtained in step S2 in a reducing atmosphere at 820-860 DEG C for 1-2 hours to form a silver-copper thick film conductor layer on the surface of the ceramic substrate. The sintering method of silver-copper thick film conductor paste for ceramic substrate surface provided by the application realizes high-temperature sintering of silver-copper thick film conductor paste on a ceramic substrate, reduces the cost, is simple in sintering process, and has quite good performance of the sintered film.