10results about How to "Fast sintering" patented technology

The invention belongs to the field of electronic component manufacturing, and particularly discloses a sintering method of a multilayer ceramic capacitor, which comprises the following steps of: carrying out trial sintering on a laminated green body after glue removal according to a sintering curve to obtain an oxygen consumption-temperature curve, and taking the oxygen consumption as a reference oxygen consumption at a corresponding temperature; formal sintering is carried out on the stacked green bodies after glue discharging according to a sintering curve, and the sintering atmosphere is adjusted according to the variable quantity of the real-time oxygen consumption and the standard oxygen consumption; the sintering atmosphere contains inert gas, hydrogen and water vapor. According to the sintering method, the sintering atmosphere composition and the gas flow in the formal sintering step can be regulated and controlled in real time, so that the stability of fluidity, oxidability and the like of the sintering atmosphere in the formal sintering process is ensured, the oxidized amount of the Ni element in the MLCC product is controlled, the electrical performance and the reliability of the prepared MLCC product are improved, and the production cost is reduced. Meanwhile, the equipment utilization rate is increased, the productivity is increased, and the cost is reduced.

The invention discloses a foamed polypropylene bead capable of being quickly formed by microwaves, the foamed polypropylene bead has a core-shell structure, a core layer material comprises high-melting-point high-modulus polypropylene, a shell layer material comprises a low-melting-point propylene copolymer and / or a polypropylene blend and a certain amount of a microwave heating aid, and the interior or surface of the foamed bead shell layer also contains a surfactant. The microwave heating aid can be rapidly heated under relatively low microwave heating power, so that the low-melting-point polypropylene material on the surface layer is rapidly melted and is fused and sintered with other surrounding foamed polypropylene bead shell layers, and the surface active agent can further improve the heating efficiency; the interior of the foamed polypropylene bead does not contain a microwave heating aid and a surfactant, low-power microwaves cannot enable the internal temperature of the foamed bead to rise too much, an original independent closed-pore structure can be kept, an obtained molded part is high in curing degree and good in surface sintering, the whole molding process is short in time and low in energy consumption, a large amount of cost is saved, and the method is suitable for large-scale production. The environment is protected.

The invention discloses a positive electrode material sagger and a manufacturing method based on a spray granulation technology, and belongs to the technical field of lithium battery sagger manufacturing. Firstly, potassium aluminum silicate, mullite, cordierite and aluminum titanate are subjected to dry mixing, and an organic binder and water are added to prepare a material A; then performing dry mixing on cordierite, talc, zirconium dioxide, kaolin and aluminum oxide, and adding an inorganic binder and water to prepare a material B; mixing the material A, the material B and water to obtain mixed slurry; carrying out spray drying granulation on the mixed slurry; carrying out dry pressing molding on the particle material to prepare a sagger green body; and sintering the sagger green body at high temperature to obtain the positive electrode material sagger. In the manufacturing process, abrasion to a mold is small, and the manufactured saggar is good in mechanical performance, low in porosity and long in cycle service life.

The invention provides anti-oxidation nano copper powder, a preparation method thereof and nano copper soldering paste, and the preparation method of the anti-oxidation nano copper powder comprises the following steps: dissolving copper salt in a solvent, and adding soluble metal hydroxide to prepare a precursor solution; wherein the molar ratio of the soluble metal hydroxide to the copper salt is (0.5-3): 1; the method comprises the following steps: dissolving L-ascorbic acid in a solvent, stirring at 40-80 DEG C for 10-20 minutes, and cooling to obtain a reaction solution; mixing the precursor solution and the reaction solution to obtain a mixed solution, wherein the molar ratio of the copper salt to the L-ascorbic acid is 1: (2-4); and adding the mixed solution into reducing alcohol, uniformly stirring, heating to 155-195 DEG C, carrying out heat preservation reaction for more than 15 minutes, and washing, centrifuging and drying a product to obtain the antioxidant nano copper powder. According to the technical scheme, the obtained nano copper powder is small in size, resistant to oxidation and good in stability in air, low-temperature sintering interconnection of chips is achieved, and the joint reliability is high.

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.

The invention discloses a composite alloy and a preparation method thereof, belongs to the technical field of metallurgical materials, and is used for solving the problems that in the prior art, in order to improve the comprehensive mechanical property of hard alloy, a large number of other metal elements are doped, so that the cost of preparing the composite alloy is obviously increased; in addition, the technical problems of adding any fluxing agent to improve the purity of the composite alloy and simplifying the preparation process are urgently solved. The composite alloy comprises a component A and a component B, the component A comprises phosphorus, iron, chromium, nickel and molybdenum, and the component B comprises manganese, copper, titanium, calcium, magnesium, aluminum and an organic fluxing agent. And carrying out esterification reaction on the alkalized charcoal mixed solution and boric acid to obtain the organic fluxing agent. According to the prepared composite alloy, trace and various metal elements are doped, and the specific organic fluxing agent is added, so that the composite alloy with high purity and excellent comprehensive mechanical properties is prepared.

The invention discloses a carbon ceramic closing resistor for a high-voltage circuit breaker and a preparation method of the carbon ceramic closing resistor, and belongs to the technical field of power elements. The problems of poor resistor compactness, non-uniform performance, insufficient mechanical property and the like caused by high pressing and sintering difficulty, process instability and high and non-uniform resistor porosity of the carbon ceramic resistor are solved. The preparation process of the resistor comprises the following steps: by taking aluminum oxide and quartz as ceramic phases, presintered kaolin, mullite and potassium feldspar as clay phases and carbon black or graphite as conductive phases, pre-coating the ceramic phases with the clay phases, carrying out vacuum calcination on pre-coated powder, mixing the pre-coated powder with the secondarily added clay phases and the conductive phases, carrying out spray granulation, pressing a green body, sintering and spraying. And obtaining the carbon ceramic closing resistor. According to the invention, the kaolin is pre-sintered, and the clay phase is pre-coated with the ceramic phase, so that the subsequent blank pressing uniformity and density are increased, the structural defects of the carbon ceramic resistor are reduced, and in combination with the spark plasma sintering technology, the batch rapid production of the resistor can be realized.

The anti-scouring anhydrous stemming is prepared from the following raw materials in percentage: 45% of white corundum, 5% of silicon carbide, 6% of anhydrous aluminum oxide, 25% of a carbon raw material, 15% of soft clay, 10% of an additive, 10%-15% of a binding agent, 3% of an additive and expanding agent and 2% of a plasticizer. The invention has the advantages of good plasticity, high wear resistance and corrosion resistance, good sintering performance and high adhesion strength.

A radioactive nuclide 137 A rapid remediation device and method for Cs-contaminated soil includes an inlet for adding an activator and raw materials, a power supply, a microwave device, an auxiliary extrusion rod, a pressure plate containing a spray head, and a solid pressure plate. The solid pressure plate is located above the pressure plate containing the spray head, and the power supply and microwave device are positioned above the solid pressure plate. A spray head is provided on the pressure plate containing the spray head, and the auxiliary extrusion rod passes through the solid pressure plate and enters the spray head to extrude it. The spray head contains the activator and raw materials, and the auxiliary extrusion rod pushes the activator and raw materials into the soil. This application's solution combines microwave and solidification technologies to achieve remediation of soil containing radioactive nuclides. 137 Advantages of Cs in soil remediation.

The utility model relates to a rapid sintering device for the surface of a sealing strip. The device comprises an equipment bracket, a spray gun bracket and a spray gun, the equipment support is provided with two spray gun supports, the spray gun supports are in a circular ring shape, the arrangement directions of the two spray gun supports are opposite in the vertical direction, and the spray guns are arranged on the spray gun supports in a sliding mode. According to the utility model, the surface of a product is quickly heated by self-made multi-nozzle gas sintering equipment, and the baking temperature of an oven is increased from 300 DEG C to the flame baking temperature of 1700-2500 DEG C, so that the surface of the product is quickly sintered; the appearance outline of the product is solidified, the problems of smudginess, air holes, belt indentation and the like caused by unsolidified products are effectively solved, and the appearance stability of the product is guaranteed.