22results about How to "Improve sintering performance" patented technology

The application belongs to the technical field of copper-based diamond composite materials, and particularly relates to a diamond copper-based composite material and a preparation method thereof. The preparation method comprises the following steps: mixing modified diamond powder and copper powder by ball milling, and obtaining a diamond copper core material after hot-pressing sintering; activating the diamond copper core material, then magnetron sputtering a Ni / Pr alloy target material onto the upper and lower surfaces of the activated diamond copper core material to form a Ni / Pr composite intermediate layer; vacuum welding copper sheets on the upper and lower surfaces of the Ni / Pr composite intermediate layer to obtain the diamond copper-based composite material. The diamond copper-based composite material prepared by the application has high density, excellent thermal conductivity, low thermal expansion coefficient and is convenient to process.

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 invention discloses a composite refractory material blast furnace skimmer and a preparation method thereof. The blast furnace skimmer is prepared from sintered corundum, brown corundum, white corundum, chromic oxide or activated aluminum oxide, zirconium oxide or boron carbide, metal chromium powder or metal aluminum powder, squamous graphite, silicon carbide, silicon carbide, aluminum oxide fibers, polypropylene explosion-proof fibers, high-temperature asphalt powder and a polyphosphate dispersing agent in different specifications. The preparation method comprises the following steps: respectively preparing a powdery raw material and a liquid raw material according to the raw material ratio; and mixing the powdery raw material and the liquid raw material, pouring and molding, and then air-drying, drying and sintering to obtain the product. The blast furnace skimmer provided by the invention has relatively high strength, slag corrosion resistance, scouring resistance, oxidation resistance and thermal shock resistance, and the service life of the blast furnace skimmer is greatly prolonged.

Provided are an oxide sintered body mainly containing a molybdenum oxide, a sputtering target containing the sintered body, and an oxide thin film formed by the sintered body. In the present invention, by adding a specific (pseudo) metal oxide in a prescribed range to a molybdenum oxide and a niobium oxide which are difficult to sinter, the sinterability can be improved and high-density characteristics can be ensured even if pressureless sintering is performed.

The application provides a ceramic sintering device with a protection structure, and belongs to the technical field of ceramic production machinery, which comprises a sintering device, a closing door is rotationally connected to the front part of the sintering device, a protection seat is arranged on the bottom side of the inside of the sintering device, a detachable ceramic sintering table is nested and connected to the upper part of the protection seat, and a sintering chamber is arranged in the sintering device. Three water collecting devices are arranged at three space positions of the upper, middle and lower parts of the ceramic sintering device, a water scraping plate is connected to the upper part of the water collecting device, water is conveniently collected into a water collecting box or a water receiving chute, meanwhile, the water collecting device is used in cooperation with a water blocking cover, water droplets are effectively prevented from falling on the ceramic and affecting the sintering operation, a minimized ceramic sintering space is formed through the sintering chamber and a sintering closing seat, there is almost no temperature gradient in the inside, the sintering effect is improved, and the detachable ceramic sintering table is convenient to separate from the sintering device, cleaning and maintenance are facilitated, and the operation efficiency is improved.

The utility model discloses a quick-connection preheating type graphite box air intake and exhaust structure for a high-temperature sintering furnace, which comprises an empty hearth, a sintering graphite box is arranged in the vacuum hearth, air intake cylinders are arranged on the left side and the right side of the lower surface of the sintering graphite box, and the output ends of the air intake cylinders are fixedly connected with common air pipes. A second graphite gas pipe is fixedly connected to the upper surface of the common gas pipe, a plurality of distribution discs are arranged in the second graphite gas pipe, a quick-release connector is fixedly connected to the upper surface of the second graphite gas pipe, and the upper surface of the quick-release connector is fixedly connected with the sintering graphite box. The gas can be uniformly dispersed in the second graphite gas pipe through the uniform distribution holes of the distribution disc, and each part of the gas can be in full contact with the high-temperature graphite pipe wall in the preheating process, so that the temperature of the gas entering the sintering graphite box is more uniform, and the sintering effect is further improved.

The application discloses a doped modified lead metaniobate-based high-temperature piezoelectric ceramic and a preparation method thereof. The doped modified lead metaniobate-based high-temperature piezoelectric ceramic has a general formula of PbNb2O6+x mol% Nb2O5+y wt% Sc2O3+z wt% SrCO3+delta mol% Ta2O5; wherein x=0-8, y=0-0.8, z=0-1, and delta=0-12. The application solves the problems of sintering difficulty, low density and low piezoelectric coefficient of pure PbNb2O6 by adding excess Nb2O5; on the basis, Sc 3+ , Sr 2+ , and Ta 5+ ions are doped in sequence, so that the piezoelectric performance of the PbNb2O6-based piezoelectric ceramic is continuously improved while the high Curie temperature is ensured.

This invention discloses a method for preparing magnesium aluminum spinel using calcium aluminate filter residue from water treatment agents, belonging to the field of magnesium aluminum spinel synthesis technology. The method involves drying the calcium aluminate filter residue from water treatment agents and then calcining it at a low temperature of 400-800℃ to obtain an intermediate material. This intermediate material is then mixed with a magnesium source and rare earth oxides and ball-milled to obtain a mixed powder. The mixed powder is then pressed into pellets and sintered at a high temperature of 1400-1700℃ to obtain magnesium aluminum spinel. This method uses calcium aluminate filter residue from industrial solid waste water treatment agents as the main raw material, fully utilizing its raw material characteristics to prepare a high-purity, high-density magnesium aluminum spinel product, achieving high-value utilization of waste. Furthermore, this method is simple to operate, low-cost, and easy for industrial production.

The application discloses a high-performance aluminum nitride ceramic rapid sintering method and belongs to the technical field of ceramic materials, and comprises the following steps: preparing ceramic raw materials according to a formula: uniformly mixing high-purity aluminum nitride powder, a sintering aid, a hydrolysis-resistant agent and a solvent, and drying under a nitrogen atmosphere; the ratio of the high-purity aluminum nitride powder, the sintering aid and the hydrolysis-resistant agent is 1:1%-3%:0.5%-1.5%; primary sintering of the ceramic: heat-press sintering the uniformly mixed aluminum nitride powder under a neutral or reducing atmosphere at 1650-1850 DEG C and a pressure of 20-30 MPa for 10-60 min, so that the density of the aluminum nitride powder reaches more than 99%; secondary sintering of the ceramic: sintering the primary-sintered aluminum nitride ceramic under a reducing atmosphere at 1850-2000 DEG C under normal pressure for 1-6 h. The prepared aluminum nitride ceramic not only has high heat conduction performance, but also has high sintering efficiency; meanwhile, the problem of waste gas generated in the degreasing process is avoided, and the environment is protected.

This invention discloses a Zisha mineral water filter, made from 60% Zisha clay, 20% tourmaline powder, 15% maifanite powder, and 5% clinoptilolite powder. The process involves vacuum refining, aging, molding, air-drying, and high-temperature sintering at 850℃ to produce mineralized ceramic blocks. The product can be directly placed in water cups or teapots, transforming tap water into weakly alkaline, small-molecule cluster active water (pH 7.4–8.2) within 10 minutes, dissolving beneficial minerals without heavy metal leaching. It is resistant to boiling water, does not pulverize, and does not cloud the water, with a service life of 6–12 months. This invention features a stable, safe, and convenient process suitable for daily drinking water, solving the problems of traditional filter media's single function, poor stability, and insufficient safety. It is suitable for healthy drinking water in homes and offices.

This invention relates to the field of conductive pastes, specifically a low-temperature conductive paste suitable for 3D printing, its preparation method, and its applications. The low-temperature conductive paste comprises silver nanoparticles, a diluent, and a binder; wherein the surface of the silver nanoparticles is coated with ligands; the diluent is an organic alcohol; and the binder is an alcohol-soluble resin. This invention aims to overcome the problems of easy agglomeration of silver nanoparticles and poor dispersibility during long-term storage in existing conductive pastes, leading to easy clogging of the 3D printing nozzle, poor conductivity after sintering, and poor adhesion. The low-temperature conductive paste prepared by this invention not only has good dispersibility and stability but also exhibits good density and conductivity after sintering, enabling high-precision direct-write 3D printing of 10 μm and below.

The application discloses a structural ceramic material, a preparation method and application and a nozzle, and belongs to the technical field of the nozzle for the Yellow River water sprinkling irrigation. The structural ceramic material comprises a base and an added phase, wherein the base is (Ti, W)C, and the added phase is Ti3SiC2, and the structural ceramic material is prepared by adopting discharge plasma coupling high-frequency induction sintering. Ti3SiC2 uniformly dispersed in the (Ti, W)C base is used as a sintering aid, the good electric conductivity and high thermal conductivity of the Ti3SiC2 are utilized, the discharge sintering effect is strengthened and the heat conduction is accelerated, the sintering performance of the (Ti, W)C ceramic material is improved, sintering is completed at a lower sintering temperature, and the defect of poor high-temperature mechanical property caused by the traditional addition of a metal bonding phase as a sintering aid is overcome; the addition of the Ti3SiC2 can also improve the tribological property of the (Ti, W)C ceramic material, and the obtained structural ceramic material has excellent friction-reducing and wear-resistant properties, and is an excellent nozzle material for the Yellow River water sprinkling irrigation.

The application relates to an ultrathin device and a preparation method and application thereof. The ultrathin device is prepared by the following steps: a mixture containing raw material powder, a binder and a solvent is granulated by a spray drying method to obtain a first precursor, the raw material powder comprises metal material powder and / or ceramic material powder, the surface area average particle size of the raw material powder is 1-15 mu m, the mass ratio of the raw material powder to the binder is 100:(1-10), the surface area average particle size of the first precursor is 40-80 mu m, and the fluidity of the first precursor is lower than 30 s / 50 g; the first precursor is subjected to a forming treatment to obtain a second precursor, the second precursor has a preset shape; and the second precursor is subjected to a heat treatment to obtain the ultrathin device, and the thickness of the ultrathin device is less than or equal to 1 mm.

The application belongs to the field of powder metallurgy and cermet material, and discloses a preparation method of high-entropy binder phase Ti(C, N) based cermet material and a product thereof. The preparation method uses Fe, Mn, Co and Cr elemental metal powders as raw materials, mixes and performs ball milling to obtain high-entropy alloy powder, and then the high-entropy alloy powder is mixed with Ti(C, N) powder and secondary carbide powder to obtain a mixed powder, and then a forming agent and anhydrous ethanol are sequentially added to perform wet milling to obtain a mixed slurry, which is dried, ground, sieved, pressed, degreased and sintered to obtain the high-entropy alloy Ti(C, N) based cermet material. The obtained high-entropy alloy Ti(C, N) based cermet material has uniformly distributed core-ring structures, and the ring phase transition layer with moderate thickness effectively inhibits the growth of Ti(C, N) grains, achieves fine-grain strengthening and solid solution strengthening, has good bending strength, fracture toughness, high hardness and high density, and can be used for high-speed cutting, finishing and semi-finishing under complex conditions.

The utility model relates to the technical field of metallurgical engineering, and discloses a sintering machine material distribution uniformity adjusting device which comprises a sintering furnace, a hollow column is fixedly connected to the outer side of the sintering furnace, an adjusting column is slidably connected to the interior of the hollow column, a scraper is fixedly connected to the bottom of the adjusting column, and a shell is fixedly connected to the outer side of the hollow column. An inner shell is fixedly connected into the outer shell, a plug pin is slidably connected into the inner shell, the plug pin is sleeved with a spring, a locking assembly is arranged on the outer side of the plug pin, and a conveying assembly is arranged in the middle of the sintering furnace. According to the utility model, the bolts are inserted into the different circular holes in the adjusting columns, so that the height of the scraping plate is adjusted, and the thickness of materials is accurately controlled. Compared with the scheme that only the position of the scraper blade is fixed in the prior art, the adjusting mode not only improves the uniformity of the materials, but also enables the thickness of the materials to be more controllable in the sintering process, and therefore the sintering effect is improved.

The invention discloses a medical tricalcium silicate, a tricalcium silicate-based bone cement material and a preparation method thereof. The preparation method of the medical tricalcium silicate comprises the steps that raw materials including calcium carbonate powder, composite silicon dioxide, a lubricating agent and a binding agent are subjected to ball milling and then pressed into a blank, a prefabricated blank is obtained, the prefabricated blank is soaked in silicate ester sol containing a whitening agent for surface coating, then sintering and quenching treatment are sequentially conducted, and the medical tricalcium silicate is obtained. The tricalcium silicate-based bone cement material comprises medical tricalcium silicate, non-calcium silicate salt, a water reducing agent, bioactive glass and a developing additive. The tricalcium silicate product has high purity and whiteness, meanwhile, the curing performance of the bone cement can be improved, and the bone cement prepared from the tricalcium silicate-based bone cement material can be rapidly coagulated and cured, is high in compression resistance and high in biological safety and can be used for tooth root canal treatment.

The application discloses a method for preparing high-performance structural ceramics based on a binder jetting technology and relates to the technical field of additive manufacturing. The application first uniformly mixes ceramic powder and sintering aids, then adds a mixed suspension containing metal salt, silica sol and glue, performs granulation to prepare coarse powder, uses the binder jetting technology to form the coarse powder into a green body, and performs debinding and sintering on the green body to prepare a ceramic-based core. The application uses ceramic powder with high sintering activity, sintering aid powder, metal salt compound, silica sol and glue to prepare micron-level coarse powder, and then prepares a ceramic printing sample through the binder jetting process, so that a printing green body with high strength can be obtained, the green body can still maintain high strength after debinding, high-temperature sintering is facilitated to prepare structural ceramics with high compactness and high strength, and the problem that the binder jetting additive manufacturing technology is difficult to prepare high-density high-performance ceramics is solved.

The present application belongs to the technical field of balance block, and discloses a balance block and a preparation method thereof. The balance block is prepared from balance block alloy powder raw materials. In the present application, the addition of nano-Fe3O4 sintering aid in the balance block alloy powder can obviously improve the sintering performance of the alloy material, and improve the density and tensile strength of the balance block.

The invention relates to a tungsten-copper composite material forming part and a preparation method thereof, and belongs to the technical field of metal composite materials. The raw materials of the forming part are composed of a tungsten source, a copper source and a forming agent. The tungsten source consists of modified tungsten powder and tungsten powder; the modified tungsten powder is obtained by adding a reinforcing phase and an activating element, wetting and adhesion of a tungsten phase and a copper phase can be promoted, the sintering performance of the formed part is improved, and the comprehensive performance of the formed part is improved; the forming agent is added to ensure that the powder has good flowability and formability, the problems that a large-size tungsten-copper blank is poor in compression molding formability and high in manufacturing cost are solved, and a tungsten-copper composite material formed part which is uniform in structural component, low in cost and easy to form is obtained. The preparation method comprises the following steps: dispersing an activating element and a reinforcing phase into tungsten powder through a ball milling method to obtain modified tungsten powder, adding double-granularity composite powder of the modified tungsten powder and unmodified tungsten powder into a forming agent to obtain easily-formed composite powder, and pressing the composite powder into a large-size tungsten copper green body, the method has the characteristics of low cost, good repeatability, controllable process, raw material saving and the like.

The embodiment of the utility model provides a conveying device, a sintering furnace and a photovoltaic cell production line, and belongs to the technical field of photovoltaic cell production equipment. The conveying device comprises two opposite conveying assemblies, wherein each conveying assembly comprises a conveying belt; the multiple supporting rods are distributed on the conveying belt, and the first ends of the supporting rods are fixedly connected with the conveying belt; the first supporting seat is fixed to the second end of the supporting rod, the first supporting seat is provided with an inclined face, and the inclined face extends from the top end of the first supporting seat to the tail end deviating from the first supporting seat. In the embodiment of the invention, when the battery piece is conveyed, the battery piece is supported on the two opposite inclined surfaces and moves along with the movement of the inclined surfaces, the contact between the battery piece and the inclined surfaces is linear contact, and the contact position between the inclined surfaces and the battery piece is the edge of the battery piece, so that the sintering area of the battery piece can be increased as much as possible; and local overheating cannot be generated, the sintering effect of the battery piece can be improved, and the product quality of the solar battery is further improved.

The utility model relates to metal processing equipment technical field discloses a kind of metal powder vacuum sintering furnace of temperature control is convenient, including vacuum furnace body, workpiece loading platform and bottom plate, workpiece loading platform lower end surface and the vacuum furnace body inner bottom surface are fixed, and the vacuum furnace body lower end surface and the bottom plate upper end surface fixed connection bottom plate upper end surface fixed connection have electric heater and pulse current generator;Vacuum furnace body inner wall surface fixed connection has three groups of heating coil pipes, and three groups of the heating coil pipe are evenly distributed along the circumferential direction of vacuum furnace body;The input end and output end of three groups of the heating coil pipe are connected with the electric heater to form independent loop by high-temperature resistant wire. The device can rapidly and uniformly heat metal powder, and optimize its sintering effect and microstructure by electric pulse treatment, improve density and mechanical properties;At the same time, real-time monitoring temperature and air pressure ensure the accurate control of sintering process, improve quality and efficiency.

The utility model provides a kind of zirconium disc sintering furnace, including sintering furnace, moving mechanism, tray loading mechanism and heating assembly, sintering furnace is set up, and sintering furnace inside has the heating chamber of bottom opening setting, moving mechanism is closed and is set in the bottom of heating chamber, and moving mechanism is movably set along transverse direction, tray loading mechanism is connected on moving mechanism, and tray loading mechanism has multiple tray loading spaces of vertical interval arrangement, heating assembly includes multiple heating unit groups built-in in heating chamber, each side wall of heating chamber is all installed and is connected with heating unit group, each heating unit group includes multiple heating units. Such as using the multiple tray loading spaces of tray loading mechanism can simultaneously load more quantity of zirconia disc, greatly improve sintering efficiency, under the action of moving mechanism, convenient transportation, so that zirconia disc is after being transported to heating chamber by each side wall heating unit group around heating, evenly sinter, guarantee better sintering effect.