228 results about "Sintering" patented technology

The utility model discloses a graphite sleeve for PI roll film sintering fixing, including for the sleeve in the outer or inner PI roll film cylinder and the fixed groove that is arranged in the lateral wall of cylinder and is in the axial direction of this cylinder and is penetrated, the fixed groove is used for fixing the end of PI roll film. Therefore before PI roll film sintering, by the cylinder sleeve in the outer or inner PI roll film, and by the fixed groove fixed in the lateral wall of cylinder and fixed the end of PI roll film, and then combining the graphite sleeve has intrinsic heat conduction and electric conductivity characteristics, therefore improves the conversion rate of homogeneous graphite film that PI roll film forms in the sintering process.

This invention provides a low-temperature sintering silver paste for solar cells, its sintering method, and its application. The low-temperature sintering silver paste comprises: 70 wt.%–90 wt.% micro / nano silver powder, 5 wt.%–20 wt.% organic carrier, and 1 wt.%–10 wt.% Ni-based coated glass powder; wherein the micro / nano silver powder comprises 60 wt.%–80 wt.% micron-sized silver spheres with a particle size of 1–3 μm and 20 wt.%–40 wt.% nano-sized silver spheres with a particle size of 20–80 nm; the Ni-based coated glass powder consists of Bi-B-Si glass powder and a magnetic Ni-based alloy coating layer coated with the Bi-B-Si glass powder. This invention introduces micro-nano silver powder and Ni-based coated glass powder into the silver paste. The Ni-based alloy coating layer is magnetic, which enhances the magnetic properties of the glass powder. By combining micro-nano silver powder with electromagnetic field composite sintering technology, the silver paste is rapidly and densely sintered at a lower temperature, which effectively improves electrode conductivity, reduces contact resistance, and enhances contact performance with the silicon substrate, thereby improving photoelectric conversion efficiency and shortening sintering time.

This invention discloses a high-strength ceramsite and method for co-pressing high-alumina coal gangue and red mud, belonging to the field of industrial solid waste resource utilization technology. This invention uses high-alumina coal gangue and red mud as the sole solid raw materials, without adding any chemical additives. The high-alumina coal gangue is ground to 125 μm and then mixed with red mud at a mass ratio of 50:50. Water is added for wetting, and the mixture is molded under a pressure of 6 MPa. After drying, it is pre-fired at 450℃ for 20 min, then sintered at 1150℃ with a heating rate of 7℃ / min, held for 20 min, and cooled in the furnace to obtain the final product. This invention utilizes the fluxing effect of Na₂O and Fe₂O₃ in red mud to effectively overcome the problems of high sintering temperature and difficult liquid phase formation caused by the high Al₂O₃ content in high-alumina coal gangue. Through the synergistic redox effect of carbonaceous components in high-alumina coal gangue and Fe₂O₃ in red mud, the timing of liquid phase formation and gas release is matched, forming a composite dense structure of crystal framework-glass phase bonding. The resulting ceramsite has a compressive strength of 228 MPa, a 1-hour water absorption rate of 3.19%, and an apparent density of 2.68 g / cm³. 3 This opens up new avenues for the high-value utilization of high-alumina coal gangue.

The application relates to a dual-phase high-entropy ceramic material for high-temperature thermal barrier coatings and a preparation method thereof, in particular to a dual-phase high-entropy ceramic (La 0.2 Nd 0.2 Gd 0.2 Y 0.2 Ho 0.2 )2Zr2O7 with low thermal conductivity and high thermal expansion coefficient, which is mainly used for thermal isolation, thermal barrier coatings and other applications in high-temperature environments. The application is prepared by adopting a solid-phase reaction sintering process through accurate design of the combination of rare earth elements, forms a stable dual-phase structure, effectively inhibits grain growth through grain boundary pinning, and thus maintains a nanoscale grain structure. Meanwhile, the material can efficiently block heat transfer at high temperatures through optimization of phase proportion, and the thermal expansion characteristics are matched with a metal base layer, effectively avoiding the falling risk caused by the difference in thermal expansion of the two, and thus greatly improving the service life and reliability of the material in a high-temperature environment. The high-entropy ceramic material of the application can be widely applied to fields with high demand for high-temperature thermal isolation in aerospace, aviation, automobile industry and the like, is especially suitable for thermal barrier coatings, high-temperature thermal insulation materials and other high-temperature thermal insulation applications, and has important engineering application value.

A hot-pressing sintering method for an optical zinc sulfide rectifier includes the following steps: zinc sulfide powder pretreatment; loading: mixing the pretreated zinc sulfide powder with a sintering additive with a melting point lower than zinc sulfide and loading it into a mold with a thermal expansion coefficient smaller than that of polycrystalline zinc sulfide, placing it in a hot press furnace, closing the furnace, the weight of the mixed powder loaded into the mold exceeding the raw material weight required for the ideal product of the mold, the mold being pre-coated with a release agent; starting up, when the absolute pressure drops below 500 Pa, starting the heating, while continuing to evacuate to no more than 5 Pa; the first stage heating at 5-10℃ / min to the second stage heating at 300-400℃ / min. 00℃ and hold for 1-4 hours; S4, the vacuum pressure at the second stage target temperature of 300-400℃ should not exceed 5Pa; 10 minutes before the end of the second stage, pre-pressurize in a cold state to 40-60% of the process pressure; in the third stage, continue to raise the temperature to 900-1000℃ at 5-10℃ / min, hold for 30-60 minutes after reaching the temperature, raise the process pressure to 20-40MPa in 30 minutes, and finally hold for 60-120 minutes; after the holding and pressure holding are completed, release the pressure, turn off the heating, let it cool naturally, cool with the furnace to room temperature, and then remove from the furnace.

The application discloses a gunning material for a melting type RH refining furnace, a preparation method and a use method. The gunning material is prepared from the following raw materials in percentage by mass: magnesia 55-80%, pre-synthesized spinel 10-30%, nano-polycrystal magnesium oxide 5-10%, aluminum-magnesium composite heating agent 3-8%, and sintering aid 0.5-5%. Through the synergistic heat release effect of the aluminum-magnesium composite heating agent and the optimized oxygen-fuel ratio flame, the gunning material is in a molten or semi-molten state when reaching the surface of the base body, and forms a firm metallurgical bond with the base body, instead of simple physical adhesion or low-temperature sintering. This greatly prolongs the service life of the repair layer to more than 20 furnace times, which is more than 4 times longer than the 1-5 furnace times of the traditional gunning material.

This invention relates to the field of ceramic materials and their preparation technology, and particularly to a Pt-doped perovskite ceramic composite material, its preparation method, and its application. The Pt-doped perovskite ceramic composite material provided by this invention uses platinum (Pt) as the dopant phase, and combines a sol-gel assisted doping method with a two-step sintering process using solid-state methods to uniformly distribute Pt in nanoparticle form on Sm... 0.5 Sr 0.5 The ZrO3 ceramic grain boundary region (forming a grain boundary nano-Pt phase) enhances near-infrared reflectivity and reduces thermal radiation absorption while maintaining the stability of the main phase lattice. This invention reduces the thermal conductivity of the ceramic composite material while improving its high-temperature stability through the interfacial regulation effect of the grain boundary nano-Pt phase. This invention also significantly improves the toughness and crack resistance of Pt-doped perovskite ceramic composite materials by constructing Pt nanoparticles to "pinneck" cracks at the ceramic grain boundaries, thus overcoming the intrinsic brittleness of ceramic materials.

The application discloses a low-temperature normal-pressure sintering preparation method of silicon nitride ceramic for high-power electrothermal elements, and comprises the following steps: (1) mixing silicon nitride powder and nitride glass sintering additives, wherein the amount of the silicon nitride powder is 60%-93% based on the total weight of the mixed raw materials, and the amount of the nitride glass sintering additives is 7%-40%; (2) drying the mixture obtained in the step (1) to obtain dry materials; (3) forming the dry materials obtained in the step (2) to obtain formed materials; and (4) sintering the formed materials obtained in the step (3) under normal pressure. According to the method, the sintering temperature is reduced to a low-temperature interval of 1550-1680 DEG C by using the nitride glass sintering additives, the dependence on expensive and complex hot-pressing or gas-pressure sintering equipment is eliminated, the normal-pressure sintering of high-performance silicon nitride ceramic is realized while the energy consumption and cost are significantly reduced, and a process foundation is laid for large-scale and low-cost manufacturing.

The application discloses a preparation method of an alumina copper-clad plate with reduced black spots, and belongs to the field of advanced ceramic preparation. The alumina copper-clad plate is obtained through a direct copper-cladding sintering method and black spot removal. The black spot proportion of the alumina copper-clad plate is less than 1%, and the bending strength reduction proportion is 0, so that the product yield is greatly improved, and the overall manufacturing cost is reduced.

The application relates to the technical field of light-emitting materials, and discloses a red fluorescent glass ceramic material, which has a general chemical formula of xMgO:yAl2O3:zSiO2:mEu 2+ Wherein, x, y, z and m respectively represent the mole fraction of corresponding elements, and 0.5<=x<=3, 0.5<=y<=3.5, 2<=z<=6 and 0.005<=m<=0.08; the red fluorescent glass ceramic material is prepared by laser sintering and reduction heat treatment. The preparation method is short in time consumption and low in energy consumption; the prepared red fluorescent glass ceramic has excellent light-emitting performance under blue light excitation and can be directly used as a fluorescent conversion element.

This invention provides a high-voltage ceramic capacitor dielectric material, its preparation method, and a ceramic capacitor. The raw materials for preparing the high-voltage ceramic capacitor dielectric material include Ca-B-Si microcrystalline glass powder, which is prepared from CaCO3, B2O3, and SiO2. By introducing Ca-B-Si microcrystalline glass powder into the raw materials for preparing the high-voltage ceramic capacitor dielectric material, this invention utilizes the characteristics of Ca-B-Si microcrystalline glass powder to form a liquid phase that fills the grain boundaries and micropore defects of the main crystalline phase during sintering, while simultaneously precipitating a large number of uniformly distributed micrograins in situ. This significantly improves the ceramic density and breakdown field strength of the high-voltage ceramic capacitor dielectric material, effectively reduces the sintering temperature, and maintains the original high dielectric constant and low dielectric loss characteristics. Furthermore, the high-voltage ceramic capacitor dielectric material provided by this invention is a lead-free system, meeting the requirements of green environmental protection.

This invention discloses a channel structure and manufacturing method for extending the lifespan of substrate glass, belonging to the field of substrate glass manufacturing technology. By providing a filling layer between the platinum channel body and the innermost refractory material, and by providing filling layers between adjacent refractory material layers and pre-reserving expansion gaps between adjacent refractory components, the uniformity and density of the gap filling between the platinum channel body and the refractory material are ensured. This ensures the consistency of high-temperature sintering of the filling powder, effectively reduces the interface gap between the platinum body and the filling powder, inhibits platinum oxidation and volatilization, and contributes to extending the service life of the platinum channel body. Furthermore, by pre-setting compatible filling layers between different layers of refractory material, the deformation stress caused by the difference in thermal expansion coefficients of different layers of refractory material during heating can be buffered, ensuring the structural integrity of the refractory material covering system surrounding the platinum channel body, avoiding cracking problems caused by asynchronous thermal expansion of the refractory materials, and further extending the overall service life of the channel.

The application discloses a preparation method of a wide-bandgap perovskite photoactive layer, and comprises the following steps: S1, lead iodide powder, cesium iodide powder and ytterbium bromide powder are proportioned according to a proportioning molar ratio, and an inorganic target material is prepared by using a hot-press sintering process; S2, formamidinium hydriodide powder and methylammonium bromide powder are proportioned according to a proportioning molar ratio, and an organic target material is prepared by using a normal-temperature preparation process; S3, a pretreated substrate is placed on a magnetron sputtering sample table, the target materials prepared in steps S1 and S2 are respectively installed on corresponding radio frequency sputtering targets, and the background of a magnetron sputtering system is vacuumized; S4, high-purity argon gas is used as a sputtering gas, and a wide-bandgap perovskite thin film is prepared by using a magnetron co-sputtering method; the sputtering power of the inorganic target material prepared in step S1 is controlled, the sputtering power of the organic target material prepared in step S2 is controlled, and the thickness of the thin film is controlled, so that the high-quality thin film is prepared by using the differential target material preparation process.

The invention relates to the field of tungsten-based alloy target material preparation, in particular to a tungsten-based multi-component alloy target material containing a W3Ni17 specific phase and a preparation method, the target material contains the W3Ni17 specific phase and auxiliary phases such as a W phase and Ni3Ta phase, W powder and Ni powder serve as basic powder, and Cr / Ta / Si powder serves as optional auxiliary powder; the preparation method comprises the steps of multi-step segmented argon protection mixing according to a specific phase atomic ratio, alloying purification, cold isostatic pressing multi-section pressure relief forming, multi-section heating hydrogen protection sintering and the like. According to the design, the problems that a conventional target material cannot form a specific functional phase, elements are segregated, the density is insufficient, and light modulation efficiency and cycling stability are difficult to consider are solved, the density of the prepared target material is larger than or equal to 96%, the average crystal grain is smaller than or equal to 50 micrometers, the W3Ni17 phase accounts for 40%-85%, and the target material is suitable for preparation of a large-area electrochromic film and meets the requirements of the fields of energy-saving buildings, automobiles and the like.

The application relates to the field and discloses a high-thermal-conductivity hexagonal boron nitride ceramic material and a preparation method thereof; the ceramic material is made of hexagonal boron nitride powder, an aluminum-boron interface precursor, a rare earth oxide additive, a fluoride fluxing agent and inevitable impurities; the hexagonal boron nitride powder comprises first flaky hexagonal boron nitride powder and second flaky hexagonal boron nitride powder, and the two are matched according to particle size gradation. During preparation, the aluminum-boron interface precursor formed by an aluminum source and a boron source is first attached to the surface of the flaky hexagonal boron nitride powder, then mixed with the additive to prepare slurry, the slurry is formed into an oriented blank through doctor blade flow casting, and the oriented blank is pressed into a ceramic blank body in a same direction through layering. Then, the ceramic blank body is subjected to pre-nitriding treatment and oscillation hot-pressing sintering, so that a nitridation bridging phase is formed in the contact area of adjacent flaky hexagonal boron nitride powder. The material can reduce interlamellar porosity and interfacial thermal resistance, improve the thermal conduction continuity between the flaky hexagonal boron nitride powder, and is suitable for insulating and heat-conducting ceramic components.

The application belongs to the technical field of lead-free energy storage ceramics, and discloses a sodium bismuth titanate-based lead-free energy storage ceramic and a preparation method. 0.47 Na 0.47 Ba 0.06 )TiO3 matrix, and the ceramic can release energy storage density and energy storage efficiency which are significantly improved, and has high breakdown field and good temperature stability, and the comprehensive performance is better than that of the same kind of material prepared by a conventional solid-phase method in the prior art. 0.06 1‑x Sr x (Ti 1‑x Mg x / 3 Nb 2x / 3 )O3, wherein 0.06≤x<0.18. The preparation method comprises the following steps: mixing raw materials, performing first ball milling, drying, pre-sintering, performing second ball milling, drying, forming, degumming, and finally performing segmented sintering; wherein the segmented sintering is: first heating to 1000 DEG C at a heating rate of 5 DEG C / min, and then heating to 1100-1150 DEG C at a heating rate of 3 DEG C / min and keeping the temperature. The application introduces Sr, Mg and Nb elements with different ferroelectric activities into the (Bi 0.47 Na 0.47 Ba 0.06

This invention relates to a high-dielectric barium titanate material, its solid-state sintering preparation method, and its application. The solid-state sintering preparation method includes the following steps: barium titanate powder is sequentially ground, decarburized, and subjected to a first crushing process to obtain fine barium titanate powder; the fine barium titanate powder is sequentially sintered and subjected to a second crushing process to obtain the high-dielectric barium titanate material; the particle size of the barium titanate powder obtained from the first crushing process is the same as that of the powder obtained from the grinding process. This invention, through grinding, decarburization, and the first crushing process, ensures that the barium titanate powder has a small and uniform particle size, enabling the formation of a uniform and dense microstructure during subsequent sintering. This improves upon the problems of low barium titanate purity, unacceptable particle size, and low dielectric constant caused by traditional solid-state sintering methods.

This invention relates to the field of extraterrestrial in-situ resource utilization technology, and particularly to a millimeter-wave vacuum lunar soil sintering apparatus and control method. The apparatus includes a vacuum chamber module, a sample support platform, a millimeter-wave feed module, and a densification monitoring module. The vacuum chamber module has a viewing window. The sample support platform is located inside the vacuum chamber, and its support portion is made of a transparent material. The output end of the millimeter-wave feed module faces the sample support platform. The densification monitoring module is located outside the vacuum chamber, and its acquisition end obtains the sample height change through the viewing window and the support portion. By real-time acquisition of temperature distribution, reflected power, and sample height change, the control module dynamically adjusts the millimeter-wave output power and sample spatial position, and determines the sintering endpoint based on the height change rate. This invention achieves synchronous monitoring and closed-loop control of the temperature field and densification state during vacuum millimeter-wave sintering, significantly improving the uniformity of lunar soil sintering and the consistency of product density.

The application belongs to the technical field of water purification materials, and discloses a preparation method of a multifunctional mineralized water purification filter core. The method comprises the following steps: after the filter core raw material is pickled, the pH value is adjusted to 6.8-7.2, pre-baking is performed, a binder is added, and then the filter core blank is formed by compression molding; the filter core blank is heated at a rate of 2.5-3.5 ℃ / min to 175-235 ℃, and baked for 0.5-1.5 h, then heated at a rate of 2.3-2.7 ℃ / min to 476-524 ℃, and baked for 1.5-2.5 h, then baked at 580-620 ℃ for 2.5-3.5 h, and then naturally cooled, coated with a filter screen, washed, activated, sealed, and the mineralized water purification filter core is obtained. By introducing the gradient sintering process, the uniformity of the filter core structure is significantly improved, the mineral dissolution amount and the pH value are accurately controllable, the attenuation is slow, the service life is longer, the service life of the ordinary filter core is improved by more than 300%, the replacement frequency and the use cost are greatly reduced, and the method has wide application in the fields of domestic drinking water, industrial manufacturing and production.

The application discloses a low-temperature toughened honeycomb adiabatic catalytic component and a preparation method and application thereof, and belongs to the technical field of new energy catalytic materials. The component is based on cordierite, is compounded with 3Y stable zirconium oxide, nano-aluminum oxide and a low-temperature borosilicate glass composite system, is formed by low-temperature segmented sintering at 1280 DEG C, and stainless steel fiber doping is abandoned, so that the toughness of the matrix is significantly improved. A gamma-Al2O3 composite transition layer and a Cu-Mn-Ce-Zr-La non-noble metal catalytic active double-layer coating are arranged on the inner wall of the pore, the coating has strong bonding force and high specific surface area. The application solves the problems of traditional honeycomb ceramic high-temperature sintering, high-temperature failure of metal reinforcing phase, weak low-temperature catalytic activity, easy peeling of the coating and the like, and the preparation process is simple and easy to mass produce. The product is suitable for coal underground in-situ gasification 180-280 DEG C low-temperature halogen adiabatic catalytic working conditions, is used for flue gas reforming, hydrogenation cracking and oil component regulation, has the advantages of low cost, thermal shock resistance, long-term stability and the like, and has strong industrial practicability.

Solution synthesis of rare-earth-doped nanoparticles, followed by flash sintering of the nanoparticles, can produce rare-earth-doped transparent polycrystalline ceramics with beneficial optical and / or mechanical properties, such as low optical losses, high optical coherence, high refractive-index controllability, and / or high mechanical strength. In one example application, high-quality erbium-doped yttria for quantum memory devices can be fabricated.

The invention relates to a method and a device for producing micro parts and micro components by means of additive manufacturing using micro laser sintering. A pulverulent agglomerating material (1) is applied in layers from a first powder reservoir (2), and the material is melted using laser light (4) after being applied. The invention is characterized in that the material (1) located in the first powder reservoir (2), which is open in the direction of a processing plane, is an agglomerating powder, the particle size (1) of which equals maximally 20 μm, and a force (F1) is applied to the agglomerating material (1) in the direction of a substrate (3) in a process region (100) at least during the application process, the agglomerating material (1) behaving as a fluid while being applied as a result of said force. For this purpose, the device has a horizontally aligned base (5) which is interrupted at least in some regions in a process region (100) above a substrate (3) and has a first powder reservoir (2) which is arranged above the base (5) in a horizontally movable manner over the base (5) and which comprises an interior for receiving a pulverulent agglomerating material (1), the particle size (1) of which equals maximally 20 μm, wherein the first powder reservoir (2) has a first means (6) in the interior thereof for applying a first axial force (F1), which acts in the direction of the base (5) and the substrate (3), to the pulverulent agglomerating material (1) located in the interior, the agglomerating material (1) behaving as a fluid in the process region (100) at least while being applied as a result of said force.

This invention discloses a method for preparing a ceramic matrix composite material on the surface of a metal pipe, comprising the following steps: S1, pretreating the surface of the metal pipe to improve its surface roughness; S2, wrapping alumina fiber cloth or high-silica fiber cloth around the surface of the metal pipe obtained in step S1 using an adhesive, thereby forming a buffer layer on the surface of the metal pipe; S3, wrapping carbon cloth or silicon carbide fiber cloth on the buffer layer on the surface of the metal pipe, and filling it with a high-temperature adhesive, followed by low-temperature curing and high-temperature sintering to form a flexible interface layer between the high-temperature adhesive and the carbon cloth or silicon carbide fiber cloth on the surface of the buffer layer; S4, depositing an energetic thin film on the flexible interface layer, and igniting the energetic thin film using a laser or electric spark to rapidly ceramicize the buffer layer and the flexible interface layer, forming a ceramic matrix composite material on the surface of the metal pipe. The resulting ceramic matrix composite material exhibits a high degree of interfacial bonding strength with a thermal expansion coefficient that closely matches the matrix thermal expansion coefficient.

This invention discloses a collaborative sintering method for metal injection molded mating parts, comprising the following steps: Step 1: Degreasing, using a solvent to decompose the binder in the metal powder. This invention upgrades the atmosphere conditioning gas supplied to the inside of the sintering chamber from "static laminar flow" to "three-dimensional dynamic turbulent flow" by setting up a gas delivery component, a forward and reverse drive component, and a longitudinal lateral movement component. This reduces the fluctuation range of oxygen content within the sintering chamber; the lateral and longitudinal temperature differences are simultaneously reduced, improving the roundness, coaxiality, and dimensional consistency of the mating parts, reducing post-processing allowances, and increasing material utilization; eliminating local overblowing and dead zones, reducing the incidence of defects such as mold sticking, corner collapse, and carbon black, and increasing the first-pass yield; furthermore, the setting of the molding separator and sintering sand allows two parts to be sintered simultaneously in the sintering mold. The fact that the two parts are in the same sintering environment reduces sintering errors and decreases the part shaping process required for parts with large sintering errors.

This utility model discloses a material carrier device for ITO target sintering, including a pad and a liner plate installed on the surface of the pad. The liner plate has protrusions connected to the concave part of its surface. An air inlet pipe is installed on the bottom surface of the pad near the liner plate. Side plates are connected to both ends of the liner plate. A support plate is installed on the outer side wall of the side plate. This utility model installs the side plates in the grooves at both ends of the liner plate, which drives the support plate to be installed stably at the end of the liner plate. At this time, the tubular target material is sleeved on the lower support plate and the upper support plate. By rotating the screw, the slider at one end of the movable plate moves up and down inside the opening on the inner side of the support plate, which drives the upper support plate at one end of the movable plate to adjust the height. This adjusts the distance between the lower support plate and the upper support plate, ensuring stable clamping of the inner wall of the tubular target material, thereby facilitating the full sintering of the surface of the tubular target material and improving the quality of the finished target material.

The application relates to the technical field of sensors, and particularly discloses a magnesium-based metal ceramic sensitive element for a breathing pump and a preparation method thereof. The sensitive element is prepared by sintering a magnesium-based metal ceramic composition, and the raw materials include a magnesium-zinc-calcium medical magnesium alloy matrix phase, a dual-phase ceramic functional phase compounded by fluorophosphate calcium and magnesium boride, a low-temperature sintering fluxing compatible phase compounded by lithium fluoride and calcium fluoride, a potassium fluozirconate interface bridging modification component and a high-purity indium conductive stabilization component. The sensitive element is prepared through inert atmosphere raw material mixing, drying, powder pre-activation, cold isostatic pressing, double sealing and protection, stepwise low-temperature pulse discharge sintering, forming processing, surface passivation and working condition pre-stabilization treatment. The sensitive element is suitable for medical breathing pump sensing, has good conductivity, creep resistance and biocompatibility, and is suitable for high-frequency alternating working conditions; the preparation method is controllable, can realize low-temperature densification sintering, and guarantees the stability of the element structure and performance.

The application discloses a kind of frozen forming high porosity ceramic membrane support and preparation method thereof, it is related to ceramic membrane technical field, slurry raw material is placed into ball mill, ball milling is passed 100 mesh screen, obtain slurry, again slurry is introduced into prepared polytetrafluoroethylene mould, again mould is directly placed into liquid nitrogen pool and frozen forming, then demolding, obtain wet blank, again wet blank is placed into vacuum environment, vacuum freeze-drying, obtain dry blank, then dry blank is placed into kiln, high-temperature sintering, then natural cooling, ceramic membrane support is obtained.The application ceramic membrane support preparation is only 4 process steps, whole process is simple, and raw material component is simple, it is not necessary to add a large number of binder, pore-forming agent to increase porosity, 1-5min can be completed forming, greatly reduce forming time, greatly shorten the sintering cycle of whole support, simultaneously using vacuum freeze-drying, utilize water sublimation drying, the position where water is located can form interstice, greatly improve the porosity of support.

The present application relates to the field of metallurgical sintering and bulk material conveying, and particularly relates to a sintered finished product three-way hopper grid-shaped round steel inserting rod switching device, which comprises a three-way structure hopper body, an upper feeding port arranged on the hopper body, and a first lower discharging port and a second lower discharging port communicated with the upper feeding port, and a switching assembly for discharging switching arranged on the hopper body corresponding to the first lower discharging port and the second lower discharging port; the grid-shaped round steel inserting rod structure is adopted, the contact area with the material can be greatly reduced, the material jamming is avoided, the operation resistance of the material flow switching of the two lower discharging ports of the hopper body is reduced, the material flow switching process between the lower discharging ports is completed on the basis of no shutdown and no material buffering, and the production efficiency is improved.

This utility model discloses a bell-shaped furnace for heat pipe sintering, including a sealed furnace platform. A circulating fan is fixedly installed at the center of the top of the sealed furnace platform, and an inner cover is fixedly installed at the top of the circulating fan. A heating cover is provided on the outer side of the inner cover, and a cooling pipe is fixedly connected to the top of the heating cover. A heat dissipation component is fixedly connected to the top of the cooling pipe. Combustion platforms are fixedly installed on both sides of the inner wall of the heating cover, and nozzles are fixedly installed on the opposite side of the two combustion platforms. The heat dissipation component includes a heat dissipation housing and a fan. This bell-shaped furnace for heat pipe sintering uses a heat dissipation component fan to draw in ambient gas through the air inlet. The drawn gas comes into contact with a cooling rod. When the cooling rod is energized, it starts to cool the gas. The low-temperature gas is filtered through a screen to dissipate impurities and then delivered to the heating cover, completing the cooling of the heat pipe. This reduces the time required for heat pipe sintering and improves the processing efficiency of the heat pipe.