114results about How to "Improve sintering performance" patented technology

The invention belongs to the technical field of whisker material growth and ceramic substrate preparation, and discloses a preparation method of an aluminum nitride whisker and a high-strength and high-thermal-conductivity ceramic substrate, and the preparation method of the aluminum nitride whisker comprises the following steps: mixing aluminum powder serving as a raw material and ammonium salt serving as an inducer according to a mass ratio of (2: 1)-(1: 2); and carrying out heat preservation for 0.5-2 hours at the temperature of 800-1100 DEG C under the nitrogen and / or ammonia atmosphere condition, and carrying out nitridation reaction. According to the invention, a whisker and ceramic substrate synthesis method is improved, aluminum nitride whiskers with uniform morphology and length-diameter ratio are controllably synthesized through a rapid nitriding method, and the aluminum nitride whiskers and spherical aluminum nitride are sintered only by taking the aluminum nitride whiskers as an additive without the participation of additional sintering aids and reinforcers, so that the ceramic substrate is obtained. The high-strength and high-thermal-conductivity aluminum nitride ceramic substrate is obtained and has high mechanical strength and thermal conductivity.

The invention provides a laser-assisted sintering method, a crystalline silicon solar cell and a photovoltaic module, and relates to the technical field of crystalline silicon solar cells. The laser-assisted sintering method comprises the steps that a to-be-sintered area of the crystalline silicon solar cell is divided into N equal parts in the direction perpendicular to a fine grid line, the first to Nth to-be-sintered areas which are arranged in sequence are obtained, and N is a positive integer larger than or equal to 4; and laser is adopted to irradiate the metal grid lines on all the to-be-sintered areas, and bias voltage is loaded on the metal grid lines on all the to-be-sintered areas so that the metal grid lines can be sintered. The crystalline silicon solar cell prepared with the metal grid lines is divided into a plurality of to-be-sintered areas, the bias voltage and the laser output power of each to-be-sintered area are controlled, the sintering effect of the metal grid lines can be effectively improved, the crystalline silicon solar cell forms good ohmic contact, and therefore the photoelectric conversion efficiency of the crystalline silicon solar cell is improved.

The invention discloses silver powder and a preparation method and application thereof, and the preparation method of the silver powder comprises the following steps: dispersing a silver source in an alcohol amine compound solution, adding a dispersing agent, and then reacting with a C3-C27 fatty amine solution to prepare the silver powder. The micron silver powder is prepared through the hydrothermal method, the powder can be heated more evenly, the method is simple in process, short in reaction time and high in efficiency, the obtained micron silver powder is good in dispersity, and the tap density of the silver powder can reach about 7 g / cm < 3 >.

The invention provides a molybdenum-based oxide sintered body, a sputtering target material containing the sintered body, and an oxide thin film formed by the sputtering target material. In the present invention, a specific dopant is added to a molybdenum oxide and a niobium oxide that are difficult to sinter in a prescribed content range, and it is possible to simultaneously ensure improved sinterability, high density characteristics, and uniformity, low reflection, and low resistance characteristics of a thin film obtained by controlling particle growth even if pressureless sintering is performed.

The invention discloses a method for preparing CaLa2S4 infrared ceramic powder with higher purity and better crystallinity, which comprises the following steps: synthesizing a precursor in a wet chemical path, carrying out thermal decomposition reaction under a relatively low-temperature condition, and carrying out low-temperature vulcanization to form a CaLa2S4 phase, thereby preparing the CaLa2S4 infrared ceramic powder with higher purity and better crystallinity. According to the method, a CaLa2S4 precursor is chemically synthesized through a liquid phase reaction, thioacetamide serves as a catalyst and an end-capping reagent, impurity elements in the precursor are removed through a thermal decomposition reaction, then the stoichiometric ratio of sulfur is recovered through a low-temperature vulcanization method, and the submicron CaLa2S4 powder is obtained through vulcanization. The method is simple in preparation process, high in synthesis efficiency and low in raw material cost, and the prepared CaLa2S4 powder has the advantages of being high in purity, good in crystallinity and sinterability, small in particle size and the like.

The present invention provides an integrated structure composite conduction type solid oxide cell and a preparation method thereof, and belongs to the technical field of solid oxide fuel cells, the integrated structure composite conduction type solid oxide cell comprises: an integrated skeleton, the integrated skeleton comprises an electrolyte layer and porous layers on two sides, the integrated skeleton is composed of a proton conductor material and an oxygen ion conductor material, the molar ratio of the proton conductor material to the oxygen ion conductor material is 1: (0.8-1.2), and the proton / oxygen ion composite material is prepared by mixing and sintering the proton conductor material with the average particle size of 50-60 nm and the oxygen ion conductor material with the average particle size of 0.1-0.2 [mu] m; the catalyst layer is positioned on the pore wall of the porous layer. According to the invention, by limiting the proportion and the particle size of the proton conductor material and the oxygen ion conductor material, more conduction type paths are prepared, and the output power of the solid oxide battery is improved.

The invention discloses transition metal carbonitride-SiCxNy composite ceramic and a preparation method thereof.The preparation method comprises the steps that MeSi2 powder and carbon powder are mixed and then subjected to uniform ball milling, drying is conducted, further grinding is conducted, and a fully and uniformly mixed powder mixture is obtained; pressing the powder mixture into a ceramic blank by adopting a cold pressing process; and performing high-temperature heat treatment on the ceramic blank in a nitrogen environment, and cooling to obtain the transition metal carbonitride-SiCxNy composite ceramic. In the preparation process of the transition metal carbonitride ceramic, a SiCxNy ceramic phase is generated at the same time, compared with single-phase ceramic, due to the existence of a second phase, the sintering performance of the composite ceramic is well improved, the strength and the toughness are improved, the silicon-based composite carbide ceramic also shows more excellent ablation resistance, and the service life of the silicon-based composite carbide ceramic is prolonged. And wide-temperature-range and high-temperature-range application of the transition metal carbonitride is realized.

The invention belongs to the technical field of powder metallurgy, and particularly relates to superfine tungsten carbide and a preparation method thereof. A preparation method of superfine tungsten carbide comprises the following steps that blue tungsten is reduced through a reverse hydrogen reduction method, and tungsten powder is obtained; the tungsten powder is subjected to carbon blending and uniform mixing, high-temperature carbonization is conducted, and tungsten carbide is obtained; and carrying out crushing airflow classification on the tungsten carbide to obtain the superfine tungsten carbide. According to the preparation method of the superfine tungsten carbide, the particle size range of the prepared tungsten carbide powder is that D10 ranges from 0.361 [mu] m to D90 ranges from 0.929 [mu] m, D50 is 0.585 [mu] m, the ratio of (D90-D10) to D50 is 0.971, particle size distribution is narrow, particle uniformity is good, the phenomenon that crystal grains grow up abnormally is avoided, and the quality of the powder is greatly improved.

The invention relates to the technical field of sintering, and discloses an in-furnace high-permeability efficient sintering process which comprises the following steps: step 1, selecting raw ore; step 2, proportioning raw ore; 3, high-quality lime application; step 4, steam preheating; step 5, sintering process control; and 6, sintering is completed. In the first step, the proportion of small-particle-size raw ore in the proportion is increased to 20%, the compactness and uniformity of a sintered block are improved, combination is easier during sintering, and therefore the strength and stability of a final product are improved, in the second step, the average particle size is controlled to be 5 mm, the particle size smaller than 1 mm is smaller than 5%, and the particle size larger than 3 mm is larger than 65%. The method ensures good fluidity and effective reaction of the material in the sintering process, the moisture content is controlled to 6.8-8%, pulverization is reduced, the strength and stability of the sintered ore are improved, and the beneficial effects of improving the drum strength and metallurgical performance of the sintered ore and ensuring long-period stable and smooth operation of the blast furnace condition are achieved.

The utility model discloses a high-performance low-cost sintering device for grain boundary diffusion neodymium iron boron permanent magnet processing, and relates to the technical field of sintering equipment, the sintering device comprises a furnace body, a processing mechanism is arranged in the furnace body and used for feeding, discharging and rolling over materials, and the processing mechanism comprises a feeding assembly, a discharging assembly and a sintering assembly. And the feeding assembly comprises a connecting base and a supporting table, a plurality of material grooves are fixedly formed in the rear surface of the connecting base, and supporting blocks are symmetrically and fixedly connected to the positions, close to the left sides, of the tops of the material grooves. According to the high-performance and low-cost sintering device for machining the grain boundary diffusion neodymium iron boron permanent magnet, a motor is started to drive a crank to rotate, and a rack is made to do transverse reciprocating motion through a connecting rod, so that a gear is driven to intermittently rotate forwards or backwards, and then a turning roller is driven to synchronously rotate; therefore, materials on the surface of the trough can roll back and forth, the materials are prevented from being blocked, and the sintering effect of the materials is improved.

The invention belongs to the field of non-oxide structural ceramics, and particularly relates to a high-bending-strength TiB2-based composite ceramic and a preparation method thereof.The high-bending-strength TiB2-based composite ceramic is prepared from TiN powder, B4C powder, Si powder, Al powder, B powder, BN powder, TiB2 powder, AlN powder and SiC powder as raw materials through the steps that powder proportioning is carried out, and the TiB2-based composite ceramic is prepared; the raw material powder is mixed, subjected to rotary evaporation, dried and sieved, and then densified by using a spark plasma sintering method to obtain the required TiB2-based composite ceramic. Through raw material formula optimization, spark plasma sintering process control and subsequent heat treatment-water quenching process, the bending strength of the TiB2 ceramic is remarkably improved, and meanwhile other excellent performance is guaranteed.

According to the matching method of the coarse-grained flux-type steel slag magnetic separation tailings in iron ore sintering, the flux-type steel slag magnetic separation tailings are innovatively mixed and screened to obtain the coarse-grained flux-type steel slag magnetic separation tailings, and the coarse-grained flux-type steel slag magnetic separation tailings are used for iron ore sintering production, so that the composition fluctuation is reduced, and the production efficiency is improved. The granulating effect of the steel slag raw material is improved. A high-alkalinity sintering raw material is further obtained through burdening calculation, and combined control over the content of MgO, the use amount of solid fuel, the water content of a sintering mixture, the use amount of a sintering grate-layer material, the height of a sintering material layer and the rotating speed of a sintering exhaust fan is matched, so that the problem that the coarse-fraction flux type steel slag magnetic separation tailings are used for iron ore production is successfully solved; and the sintering effect is enhanced, and the sintered ore yield and the drum strength are improved. The granulation effect of the sintering raw material is very good, the sintering effect is improved, the yield reaches 79.80%, the drum strength of the sintered ore reaches 66.53%, and the FeO content reaches 8.77%.

The invention discloses a coal gas injection method in a limonite sintering process, which comprises the following steps of: integrally imaging a sintering charge level according to a thermal imager above the charge level of a sintering machine to obtain the predicted temperature of the charge level, and dividing the charge level into a preheating area, a low-temperature reaction area, a medium-temperature reaction area, a high-temperature sintering area and a cooling area according to the predicted temperature of the charge level; blowing coal gas and mist water drops to the preheating area, the low-temperature reaction area, the medium-temperature reaction area, the high-temperature sintering area and the cooling area according to the coal gas injection amount and pressure and the mist water drop injection amount and pressure of the corresponding areas, and sintering; local overheating or supercooling can be avoided, and the sintering quality is powerfully guaranteed; the gas permeability of a material layer can be optimized through partitioned injection of water vapor, gas circulation and reaction development are facilitated, according to different sintering stages, coal gas and fog drop water are injected at a certain flow rate and pressure, various working conditions can be well adapted, solid fuel consumption in the sintering process is reduced, and the sintered ore yield is increased.

The invention belongs to the technical field of ceramics, and particularly relates to a light glazed ceramic large brick and a preparation method thereof. The light glazed ceramic large brick is composed of a blank body layer, a ground coat layer and a surface glazed layer, wherein the blank body layer is prepared from the following components in parts by weight: 35-42 parts of kaolin, 25-30 parts of argil, 8-12 parts of cordierite, 10-15 parts of quartz, 5-9 parts of aluminum oxide, 4-9 parts of potassium feldspar and 1-3 parts of a binder; the ground glaze layer is prepared from the following components in parts by weight: 25-37 parts of potassium feldspar, 15-20 parts of calcined talc, 15-20 parts of frit, 10-25 parts of quartz, 8-10 parts of calcite, 5-10 parts of zirconium silicate and 5-8 parts of calcined zinc oxide; and the surface polishing glaze is prepared from the following components in parts by weight: 30-40 parts of frit, 20-30 parts of clay, 15-22 parts of albite, 10-15 parts of zinc oxide, 10-15 parts of stone powder and 8-13 parts of kaolin. Meanwhile, according to the preparation method of the large ceramic brick, a low-temperature fast firing technology is adopted, the sintering performance of the large ceramic brick is improved, the strength and hardness of the large ceramic brick are improved, and the large ceramic brick is safe, firm and not prone to breakage when bearing certain pressure or impact force.

The invention discloses a nano rare earth composite enhanced high-performance ceramic chopper as well as a preparation method and application thereof. The ceramic chopper is prepared from the following raw materials in percentage by mass: 85 to 95 percent of aluminum oxide powder, 2 to 10 percent of zirconium oxide powder, 0.5 to 2 percent of dysprosium oxide powder, 1 to 2 percent of magnesium oxide powder and 0.5 to 1.5 percent of yttrium oxide powder. The ceramic chopper is prepared from the preparation raw materials through high-temperature sintering. The ceramic chopper has excellent wear resistance, strength, toughness and high-temperature stability, and packaging quality and production efficiency can be remarkably improved when the ceramic chopper is applied to semiconductor packaging.

The invention discloses a high-performance aluminum nitride ceramic rapid sintering method, which belongs to the technical field of ceramic materials, and comprises the following steps: preparing a ceramic raw material according to a formula: uniformly mixing high-purity aluminum nitride powder, a sintering aid, an anti-hydrolysis agent and a solvent, and drying in a nitrogen atmosphere, the dosage ratio of the high-purity aluminum nitride powder to the sintering aid to the anti-hydrolysis agent is 1: (1%-3%): (0.5%-1.5%); the uniformly mixed aluminum nitride powder is subjected to hot pressed sintering for 10-60 min in a neutral or reducing atmosphere at the temperature of 1650-1850 DEG C and the pressure of 20-30 MPa, and the density of the aluminum nitride powder reaches 99% or above; and re-sintering the ceramic: sintering the primarily sintered aluminum nitride ceramic for 1-6 hours at the temperature of 1850-2000 DEG C and normal pressure in a reducing atmosphere. The prepared aluminum nitride ceramic not only has high heat-conducting property, but also is high in sintering efficiency, meanwhile, the problem that waste gas is generated in the degreasing process is avoided, and environmental protection is facilitated.

The invention relates to a film sintering high-frequency automatic moving device which comprises a mounting frame, a sintering high-frequency machine is fixed to the outer wall of the middle of the mounting frame, a driving wire feeding roller and a driving wire collecting roller are distributed and mounted on the outer walls of the two ends of the top of the mounting frame, and a guide seat is fixed to the outer wall, located between the sintering high-frequency machine and the driving wire feeding roller, of the mounting frame. A guide groove is formed in the outer wall of the top of the guide seat, and a mounting frame is fixed to the outer wall of one side of the top of the guide seat. The sintering uniform cooling assembly is arranged, an arc cover fixedly covers the top of the water storage tank, an upper guide wheel and a lower guide wheel are matched to guide and convey an electromagnetic wire, the problem that the electromagnetic wire is bent and wrinkled is avoided, a driving wire feeding roller can drive a turbine pump to work, cooling water in the water storage tank is pumped, and the cooling effect of the electromagnetic wire is improved. And the liquid is pumped into the arc cover through the liquid pumping pipe, is sprayed and discharged through the spraying holes, and is sprayed on the outer wall of the conducting and conveying electromagnetic wire in the arc cover, so that a thin film formed after the electromagnetic wire is sintered is quickly cooled.

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 invention relates to the field of ceramic manufacturing technology, specifically to a high-hardness alumina-based ceramic and a preparation method thereof. The high-hardness alumina-based ceramic includes the following raw materials in parts by mass: 88 to 90 parts of alumina, 5 to 7 parts of zirconium oxide, 2 to 4 parts of lanthanum boride-modified barium titanate, 1 to 3 parts of zirconium oxide-modified silicon carbide, 6 to 8 parts of sintering aids, 1 to 2 parts of polyacrylic acid, 1 to 2 parts of sodium alginate, 0.5 to 1.0 parts of triammonium citrate, and 15 to 20 parts of solvent. The sintering aid includes a composition of magnesium oxide, nano-titanium dioxide, glass powder, and niobium pentoxide. In the scheme, alumina is used as the main body, zirconium oxide is added as a toughening agent, lanthanum boride-modified barium titanate and zirconium oxide-modified silicon carbide are used as toughening agents, and a sintering aid is introduced to improve the sintering performance, effectively improve the density of alumina-based ceramics, and increase mechanical properties such as hardness and fracture toughness.

The invention provides a method for reducing the sintering temperature of MgGa2O4 microwave dielectric ceramics, which comprises the following two steps: (1) carrying out A-site doping on MgGa2O4 by adopting (Li0. 5Bi0. 5) 2 + composite ions, and (2) paving a BaCu (B2O5) and LiF mixture in an aluminum oxide sintering crucible, and sintering at 1000-1250 DEG C to form a sintering-assisting atmosphere. According to the method, the sintering temperature of the MgGa2O4 microwave dielectric ceramic can be reduced to 1000-1250 DEG C from the traditional 1400 DEG C or above. The relative density of the MgGa2O4 microwave dielectric ceramic prepared by the method is greater than 95%, and the dielectric constant of the material measured at the frequency of 14-16 GHz is 6.5-9.5; the Q * f value is in a range of 60000 to 130000 GHz; and the temperature coefficient of resonance frequency is-78 to-10 ppm / DEG C. The method for reducing the sintering temperature of the MgGa2O4 microwave dielectric ceramic is expected to become a new-generation key preparation process in the fields of electronic communication, green processing, environmental protection and the like.

The invention discloses an intermediate of a sulfide electrolyte, a preparation method of the intermediate, the sulfide electrolyte and a preparation method of the sulfide electrolyte, the fluidity of the intermediate is 30s / 50g-75s / 50g, the preparation method of the sulfide electrolyte is characterized in that the intermediate is sintered to obtain the sulfide electrolyte, the grain size and material distribution of the sulfide electrolyte intermediate are uniform, the grain size is relatively fine, and the sulfide electrolyte intermediate has relatively high fluidity. According to the method, the intermediate of the sulfide electrolyte is adopted to prepare the sulfide electrolyte, and the improvement proportion of the ionic conductivity of the sulfide electrolyte is relatively high.

The invention relates to the technical field of all-ceramic tooth processing, in particular to energy-saving sintering equipment for zirconium dioxide all-ceramic tooth production, which comprises a sintering furnace body, and an adjusting assembly is movably arranged in the sintering furnace body. The adjusting assembly is slidably driven in the sintering furnace body through the driving assembly, zirconium dioxide all-ceramic teeth are placed in the adjusting assembly, the adjusting assembly is controlled to enter the low-temperature preheating cavity, the medium-temperature heating cavity and the high-temperature sintering cavity in sequence, and the zirconium dioxide all-ceramic teeth are heated in a sectional mode, so that the zirconium dioxide all-ceramic teeth are heated in the low-temperature preheating cavity, the medium-temperature heating cavity and the high-temperature sintering cavity. Precise control over the all-ceramic tooth sintering process can be achieved, the product quality and the production efficiency are improved, energy consumption and the production cost are reduced, after all-ceramic teeth are sintered, heat energy recycling is conducted on sintering waste heat of zirconium dioxide all-ceramic teeth through the heat exchange structure, waste of redundant heat energy is avoided, and energy conservation and emission reduction are achieved. Therefore, the energy utilization rate of the sintering equipment is improved to a great extent, and the energy-saving and efficient effects are achieved for the sintering equipment.

The invention discloses an Al2O3-SiC-MgAl2O4-C castable prepared from waste magnesia carbon materials and a preparation method of the Al2O3-SiC-MgAl2O4-C castable, and belongs to the technical field of unshaped refractory materials, the Al2O3-SiC-MgAl2O4-C castable is prepared from white corundum aggregate, silicon carbide, waste magnesia carbon bricks, spherical asphalt, alpha-Al2O3 fine powder, silicon oxide fine powder, monatomic silicon powder and calcium aluminate cement as raw materials, and a water reducing agent and water are added; the preparation method comprises the following steps: mixing the materials in a stirrer, stirring, pouring and molding, curing at room temperature, demolding, drying for 36-50 hours, carrying out heat treatment at 1550-1650 DEG C in a carbon-buried atmosphere, and keeping the temperature for 3-5 hours to obtain the refractory castable for the iron runner by using the waste magnesia carbon bricks. The prepared refractory castable is excellent in high-temperature performance and high in oxidation resistance, the service life is obviously prolonged, and meanwhile resource recycling is enhanced.

The utility model discloses a raw material sintering device for powder lime production, which belongs to the technical field of sintering equipment and comprises a sintering furnace, four groups of material guide plates are arranged in the sintering furnace from top to bottom, and the material guide plates are all obliquely arranged. According to the utility model, by designing a group of intercepting mechanisms consisting of the knobs, the main gears, the auxiliary gears, the screw rods, the guide rods, the screw blocks and the baffles, in the sintering process, the main gears are driven by the knobs to rotate, the main gears drive the two groups of screw rods to rotate through the two groups of auxiliary gears, and then the screw blocks drive the baffles to move under the action of threads and the guide rods; the gap between the baffle and the material guide plate can be adjusted, so that a material circulation channel is adjusted, the flow speed of the material is adjusted, incomplete sintering caused by limited sintering time is avoided, and the sintering effect of the device is improved.

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 high-precision ceramic material for semiconductors and a preparation method thereof, and relates to the technical field of ceramic materials for semiconductors. The material is made of the following raw materials by weight: 55-75 parts of a matrix component, 3-5 parts of a sintering aid, 8-12 parts of a subcomponent, 10-20 parts of a reinforcing component, and 1-3 parts of a bonding component; the matrix component is Ba-Ti-Bi-rare earth element-Zr-A-M-O, wherein A is a mixture of B and Te in a mass ratio of 1:(0.1-0.3); M is at least one of In, Fe, Co, Mo, and Ta; the subcomponent is a mixture of nano-niobium silicide, nano-tantalum carbide, and nano-gallium nitride in a mass ratio of 1:(0.8-1.2):(0.3-0.5). The material has high strength, sufficient fracture toughness, and low dielectric loss and apparent porosity.

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 invention relates to the technical field of silicon carbide production, and discloses a silicon carbide production and processing raw material heating device which comprises a sintering furnace body and a driving pipe, the driving pipe penetrates through the sintering furnace body, feeding ports are formed in the two ends of the sintering furnace body, a feeding mechanism is fixed to the circumference of the driving pipe, and the feeding mechanism is fixed to the periphery of the driving pipe. The driving pipe moves left and right to drive the feeding mechanism to enter and exit from the sintering furnace body, and a heating cavity used for heating treatment is formed in the sintering furnace body; the feeding mechanism comprises two sets of lantern rings fixed to the driving pipe. According to the technical scheme, when the feeding mechanism feeds the machining mold filled with the silicon carbide raw material into the sintering furnace body, the machining mold can be expanded, so that the machining mold can be close to the inner wall of the heating cavity, the distance between the machining mold and a heating source is closer, and the heating effect is improved.

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.