162 results about "Ceramic sintering" patented technology

The invention relates to the technical field of ceramic intelligent manufacturing, in particular to a ceramic firing process thermal deformation intelligent prediction and self-adaptive temperature precise regulation and control system, which comprises a multi-source sensing module (a thermal infrared camera array, a temperature sensor, a laser displacement meter and a powder characteristic analyzer); a hybrid prediction model (a space-time convolutional neural network constrained by a physical mechanism); and the self-adaptive temperature control actuator comprises a partitioned burner group, a quenching / slow cooling pipeline and a gas-air volume decoupling controller. According to the scheme, through a multi-mode perception-hybrid modeling-dynamic optimization full-process closed-loop architecture, the single-point technical limitation of existing patents is broken through, and the zero-defect precise manufacturing target of ceramic firing is achieved.

The invention discloses a ceramic firing performance prediction method based on a GA-BP neural network, and the method comprises the steps: data collection and preprocessing, gray correlation analysis and screening of key process parameters, construction of a GA-BP neural network model, model training and verification, prediction model testing, and firing performance index prediction. By means of unique intelligent algorithm fusion, the problems of high experience dependence, high experiment cost, long period, low efficiency, time consumption, energy consumption, high efficiency and the like of a method for judging the ceramic firing performance through artificial experience in actual ceramic firing production are effectively solved. The technical problem that multi-target collaborative optimization is difficult to realize at the same time in the prior art is solved, remarkable advantages are shown in the aspects of prediction precision, intelligent degree and the like, the requirements of intelligent, green and high-quality ceramic firing process optimization are met, and the method has wide application prospects and important practical value.

The invention discloses a preparation method of a MgO-MgA12O4-ZrO2 nano ceramic eutectic composite material. The preparation method comprises the following steps: S1, preparing powder; s2, flash firing preparation; and S3, high-temperature melting preparation. According to the invention, two technologies of flash sintering and high-temperature melting are combined, the problems of high sintering temperature, easy growth of crystal grains, difficult densification and the like of the traditional eutectic ceramic are solved, and an excellent composite material with a nanoscale eutectic structure is finally obtained; a nanocrystalline blank obtained through flash sintering is crushed and then subjected to high-temperature melting, microdefects and air holes possibly existing in the flash sintering blank are eliminated, the chemical components and the microstructure of a final product are more uniform, and compared with traditional selective laser melting, the method is more convenient and faster to implement and lower in cost.

The utility model relates to the technical field of ceramic production, in particular to a water-saving type ceramic firing blank grinding machine which comprises an operation table, a first clamping block is arranged above one end of the operation table, the middle of one side of the first clamping block is rotationally installed on a connecting base through a connecting shaft, and a pushing mechanism is vertically installed in the middle of the other side of the connecting base. The pushing mechanism is fixed to the operation table through a first fixing base. A second clamping block is correspondingly arranged on the side, away from the connecting base, of the first clamping block, a driving shaft is connected to the middle of the other side of the second clamping block, and the other end of the driving shaft is rotationally installed on the second fixing base. When the water-saving type ceramic sintered blank grinding machine is used and the ceramic sintered blank is ground through the elastic effect of the elastic piece, the end opening of the ceramic sintered blank can be inserted from the second clamping block, so that the elastic piece can be supported on the inner wall of the ceramic sintered blank, and the side wall of the ceramic sintered blank is supported; and the ceramic body cannot be broken due to pressure in the polishing process.

A ceramic sintered body contains a first particular element consisting of five or six elements selected from among titanium (Ti), vanadium (V), zirconium (Zr), niobium (Nb), molybdenum (Mo), hafnium (Hf), tantalum (Ta), and tungsten (W); a second particular element consisting of one element selected from yttrium (Y) and aluminum (Al); and elemental carbon (C). The total amount of the first particular element, the second particular element, and elemental carbon is 98 at % or more. The ceramic sintered body has a plurality of microstructures having respective compositions different from one another. One of the plurality of microstructures includes a solid solution containing at least three members of the first particular element.

The utility model relates to the technical field of ceramic sintering, and discloses a low-temperature fast-firing conductive ceramic microwave-assisted sintering device which comprises a microwave sintering furnace and a furnace chamber arranged on the microwave sintering furnace, the furnace chamber comprises a sintering chamber, a placing frame is connected in the furnace chamber in a sliding mode, and the placing frame comprises placing plates and sealing plates which are fixed alternately. The sealing plate is used for shielding the furnace chamber; the placing frame is arranged in the furnace chamber of the microwave sintering furnace, the placing frame is formed by alternately fixing the placing plates and the sealing plates, a plurality of conductive ceramics can be placed on the placing plates, the placing frame is moved to enable the conductive ceramics to sequentially enter the sintering chamber of the furnace chamber to be sintered, and the conductive ceramics are directly moved out after being sintered. The efficient sintering of the conductive ceramic is realized by adopting a reciprocating translation mode, the conductive ceramic is convenient to take, and the sintered conductive ceramic is still sintered when the sintered conductive ceramic is taken, so that the sintering efficiency is improved, and the phenomena of heat dissipation and energy waste caused by repeatedly opening the furnace chamber are avoided.

The utility model discloses a ceramic sintering kiln which comprises a base, a sintering chamber is arranged at the tail end of the base, a kiln door mechanism is arranged at an inlet of the sintering chamber, a lifting frame is vertically connected to the top face of the sintering chamber in a sliding mode, the bottom of the lifting frame penetrates into the sintering chamber to be connected with two parallel suspension rails, and a heating assembly is connected between the two suspension rails in a sliding mode. A conveying groove is formed in the top face of the base, the two ends of the conveying groove are rotationally connected with a driving shaft in a driving mechanism, the driving shaft is in threaded connection with the bottom of a conveying table, and the conveying table is in sliding connection with the conveying groove. According to the sintering kiln, the driving shaft is driven by the driving mechanism to rotate, so that the conveying table loaded with the ceramic green body is conveyed into the sintering chamber, the heating assembly capable of freely adjusting parameters such as interval and height is arranged in the sintering chamber, the close-range sintering requirements of ceramics of different sizes are met, and the sintering kiln has the characteristics of energy conservation, emission reduction and high applicability.

This invention provides a method for firing ceramics that can suppress the generation of exhaust gases. [Solution] The ceramic firing method utilizes a firing furnace 10 capable of performing both gas firing, which is carried out by burning gas G in a burner 12, and electric firing, which is carried out by applying electricity to a heater 13. In the ceramic firing method, gas firing and electric firing are carried out simultaneously when the temperature inside the firing furnace 10 is 1100°C (heater heating dominant temperature) or higher.

The utility model relates to the technical field of ceramic processing, in particular to a kiln for ceramic sintering, which comprises a kiln car arranged in the kiln, and a kiln top is arranged at the top of the kiln car. The stabilizing assembly is arranged between the kiln car and the kiln top, and the stabilizing assembly is used for limiting the kiln top; a damping assembly is arranged at the bottom of the kiln car and used for damping the kiln car. According to the kiln for ceramic sintering, the stabilizing assembly convenient to adjust is arranged between the kiln car and the kiln top, and the kiln top is placed on the stabilizing rod on the stabilizing assembly in an inserted mode, so that the kiln top can be stably placed, and the stability of the kiln top in the moving and feeding process is improved; and meanwhile, the damping assembly is arranged at the bottom of the kiln car, damping can be conducted on the pulley base and the kiln car through a damper and a damping spring on the damping assembly, vibration of the pulley base during rolling feeding is reduced, and the stability of the kiln car during moving is further improved.

A wafer support body 10 is provided with: a substrate 16 that comprises a ceramic sintered compact; and a conducting member 18 that encapsulates at least part of the substrate. The substrate 16 contains at least 96% by mass of aluminum oxide, contains 0.47–1.83% by mass of zirconium as the zirconium oxide equivalent, and contains 0–0.48% by mass of yttrium or ytterbium as the yttrium oxide or ytterbium oxide equivalent.

The invention discloses an electrolytic water hydrogen production and gas supply system for a ceramic sintering furnace, which belongs to the technical field of special gas delivery and comprises an electrolytic bath, a hydrogen storage tank and a power system. The interior of the hydrogen storage tank is divided into a first hydrogen storage cavity and a water storage cavity through a first piston. The power system comprises a water storage tank, a pump machine and a push cylinder. The system produces hydrogen through the electrolytic cell and conveys the hydrogen to the first hydrogen storage cavity, volume and pressure adjustment is achieved by means of liquid force transmission, and linkage control over storage, pressurization and conveying of the hydrogen is completed. The first piston physically isolates hydrogen from liquid, water vapor is prevented from being mixed into hydrogen, the low-dew-point requirement is guaranteed, and the stable reducing atmosphere in the sintering furnace is maintained. And oxygen generated by electrolysis is further introduced into a push cylinder to serve as a driving source, oxygen pressure energy is converted into mechanical energy to assist hydrogen pressurization and conveying, and efficient utilization of system energy and stable regulation and control of gas supply are achieved through the synergistic effect with liquid regulation.

The utility model is suitable for the technical field of ceramic sintering, and provides uniform sintering equipment for large-size ultrathin ceramic. The large-size ultra-thin ceramic uniform sintering equipment comprises a heating assembly and a sintering assembly, wherein the heating assembly is used for uniformly radiating heat in the heating assembly; the at least one burning tray is arranged in the heating assembly; the upper surface of the burning tray is a plane and is used for bearing workpieces, and the center thickness of the lower surface is smaller than the edge thickness. The edge of the burning tray is thick, the middle of the burning tray is thin, the temperature correspondence of the burning tray is improved, and the temperature difference on the horizontal plane of a workpiece is reduced.

A wafer support includes a base material made of a machinable ceramic including boron nitride; a first layer covering the base material; and a conductive member placed at least partially inside the base material. The first layer is made of an aluminum nitride-based ceramic sintered body, and the proportion of boron nitride included in the base material is higher than the proportion of boron nitride included in the first layer.

This invention discloses a method for simulating and testing ceramic sintering stress and a method for reducing ceramic sintering stress. The simulation and testing method includes: 1. Measuring the grain size, relative density, and geometric dimensions before and after sintering; 2. Using Abaqus to establish the ceramic geometry and construct a transient heat conduction model; 3. Establishing the viscoelastic constitutive equation for the sintering shrinkage deformation of zirconia ceramics and constructing a sintering shrinkage model; 4. Sequentially coupling the transient heat conduction model and the sintering shrinkage model to perform joint simulation of solid-state sintering, obtaining the simulation results of ceramic sintering stress. The method for reducing ceramic sintering stress includes: 5. Establishing a finite element model of ceramic sintering shrinkage with proportionally distributed grain sizes and calculating the average sintering stress distribution of the grain size proportional distribution model; 6. Comparing the average sintering stress of sintering shrinkage models with different grain size proportions to determine the method for reducing sintering stress. This invention improves ceramic sintering quality and production efficiency.

The invention discloses a split type tungsten isolation tool and a sintering method of large-size transparent ceramic, and belongs to the field of ceramic sintering, the split type tungsten isolation tool comprises a tungsten bottom plate, two tungsten long side plates, two tungsten short side plates and a tungsten cover plate, the two tungsten long side plates and the two tungsten short side plates define a tungsten boat peripheral frame body, the adjacent tungsten long side plates and tungsten short side plates are connected through tungsten connecting plates, and the tungsten connecting plates are connected with the tungsten long side plates and the tungsten short side plates. A material cavity is formed in the frame around the tungsten boat, the face, facing the material cavity, of the tungsten cover plate is connected with a tungsten reinforcing rib set used for preventing the cover plate from collapsing, and the tungsten cover plate covers the frame around the tungsten boat. The density of the sintered large-size ceramic is greater than or equal to 99%, and the visible light transmittance is greater than or equal to 78%.

A method for filling a ceramic molded body according to an embodiment of the present invention fills a plurality of pre-treatment molded bodies, which are molded bodies before CIP treatment, into a plurality of holes formed in a rubber mold for CIP. The method comprises an arrangement step, an insertion step, and an operation execution step. In the arrangement step, an anti-falling frame is arranged on the edge of a rubber mold for CIP. In the insertion step, a plurality of pre-processing molded bodies are inserted into a rubber mold for CIP in which an anti-drop frame is disposed. The operation execution step executes an operation of embedding a pre-processing molded body, which is not embedded in any one of a plurality of hole portions formed in a rubber mold for CIP in which a fall prevention frame is disposed, from among the plurality of pre-processing molded bodies.

The application discloses a kind of based on numerical simulation's silicon nitride sintering process parameter optimization method, including the following steps: to photo-curing 3D printing silicon nitride ceramic is successively implemented and sintered experiment is debound, micro characterization is carried out to the ceramic after sintering, and second characterization result is obtained;Establish the viscoelastic constitutive equation of silicon nitride ceramic sintering shrinkage deformation, based on the viscoelastic constitutive equation in Abaqus Sintering finite element model is constructed, to obtain the simulation result of transient temperature field and the simulation result of sintering shrinkage deformation;Second characterization result is corrected to finite element model, and verified finite element model is obtained;According to verified finite element model, the original sintering process curve is optimized, and the sintering process curve with the lowest cost and the greatest influence on sintering stress reduction is selected as the optimal sintering process, to realize the optimization of sintering process.The sintering process parameter optimization method not only reduces the cost, but also shortens the experimental period, and the production efficiency is high.

This invention belongs to the field of ceramic sintering technology, specifically relating to a ceramic sintering furnace and its usage method. The ceramic sintering furnace includes a first channel, a second channel, and a transfer mechanism. The first and second channels are two parallel channels physically separated by heat-insulating partitions. The first channel contains a heating chamber, a cooling chamber, and a first conveying mechanism, with the heating and cooling chambers arranged sequentially along the material conveying direction. The second channel contains a cooling chamber and a second conveying mechanism. Placement plates are fixedly connected at equal intervals along the conveying direction to both the first and second conveying mechanisms, and sintering units are placed on the placement plates. The transfer mechanism is located at the transfer port between the first and second channels. This invention uses two independent channels, completing sintering and primary cooling in the first channel and secondary cooling in the second channel. A specific staggered stacking layout is used to stack the ceramic green bodies, effectively improving production capacity and product yield.

The present disclosure provides a laminated ceramic sintered body substrate for electronic devices, an electronic device, a chip resistor, and a method for manufacturing a chip resistor. The laminated ceramic sintered body substrate for electronic devices includes a ceramic sintered body substrate and a planarization film provided on an upper surface of the ceramic sintered body substrate, the planarization film containing a thermally conductive filler.

The application provides a preparation method of an ErBCO superconducting target material, and belongs to the technical field of oxide target materials. In the application, nitric acid erbium, nitric acid barium, nitric acid copper, high-purity water, a dispersing agent and a binder are sequentially mixed, and then the mixture is subjected to segmented ball milling and spray granulation to obtain a mixed powder. Subsequently, the mixed powder is sequentially subjected to calcination, cold sintering and drying treatment to prepare the ErBCO superconducting target material. The cold sintering process can improve the density and other properties of the target material while reducing the cost, and has the advantages of significantly reducing the ceramic sintering temperature and shortening the sintering time.

This suppresses cracking in the columnar portion during the firing of ceramic cores. [Solution] The manufacturing method disclosed herein includes: preparing an outer mold having an internal cavity; placing an inner mold 50 having a columnar member 30 and a water-soluble molded body 20 in the internal cavity; filling the space between the outer mold and the inner mold 50 with a molding material F and solidifying it; dissolving the water-soluble molded body 20 with an aqueous solvent; and firing the molding material F and the columnar member 30. The columnar member 30 is a ceramic sintered body or glass. The water-soluble molded body 20 includes a through hole 22 into which the columnar member 30 is inserted, and damming portions 23 provided at both ends 22a and 22b in the axial direction of the through hole 22, which are in close contact with the outer surface of the columnar member 30. This makes it possible to manufacture a high-precision ceramic core while suppressing cracks in the columnar portion.

The utility model relates to the technical field of electronic ceramic production, in particular to a humidifying device for electronic ceramic sintering, the humidifying device is of a cylindrical structure composed of a left half box and a right half box, the inner wall of the right half box is provided with a fixing disc which is coaxially installed, and the inner side of the fixing disc is provided with a circular hollow hole. A circular hollow hole is formed in the fixing disc, limiting grooves are evenly distributed in the inner wall of the circular hollow hole, a rotary seat is rotationally installed in the circular hollow hole through a rotary bearing, a plurality of limiting clamping plates distributed in the circumferential direction are rotationally installed outside the rotary seat, and the limiting clamping plates rotate forwards and backwards along with the rotary seat and are clamped and matched with the limiting grooves in the fixing disc. Materials are subjected to the two processes of spraying humidification and immersion humidification, the good humidity can be achieved, the subsequent sintering quality is guaranteed, the angle of the whole barrel can be turned over according to the actual requirement, rapid granulation can be achieved, particles can be rapidly released, and the material circulation efficiency can be improved.

An electrode-embedded member includes a disc-shaped base that is formed of a ceramic sintered body, an electrode embedded in the base, and a plurality of pin-shaped projections projecting upward from an upper surface of the base. The upper surface of the base is a curved surface having a shape protruding toward a center. The plurality of pin-shaped projections include first pin-shaped projections whose heights from the upper surface to respective upper ends are substantially identical to each other, and second pin-shaped projections whose heights from the upper surface to respective upper ends are each lower than the height of each of the first pin-shaped projections.

A method for manufacturing a ceramic sintered body substrate includes preparing a ceramic substrate 1 provided with a through hole 2 before firing (S11), disposing a first metal paste 3 in the through hole (S12), and firing the ceramic substrate provided with the first metal paste (S14). In the disposing of the first metal paste, the first metal paste includes a plurality of particles of first metal powder (4) and a plurality of particles of active metal powder (50), and the first metal powder includes a metal powder (4a) serving as a core, and a covering metal member (40b) having a melting point lower than a melting point of the metal powder and covering at least a part of the metal powder, and in the firing of the ceramic substrate, a firing temperature is a temperature in a range from 700° C. to less than the melting point of the metal powder.

The utility model relates to sintering furnace hanging piece field, concretely relates to a high temperature hanging piece for the inside of ceramic sintering furnace, including support sleeve, the upper and lower both ends of support sleeve are fixedly installed with a plurality of hollow hanging rods, be provided with the positioning mechanism for the straining of substrate hanging hole on the hollow hanging rod, the positioning mechanism includes: rotation cover, rotates and is installed in the inside of hollow hanging rod, and its one end outer wall sets up first arc -shaped guide groove. Through the setting of hollow hanging rod and positioning mechanism etc. Component, the hanging hole of substrate is positioned and is straining, prevents substrate when sintering, and the airflow or mechanical vibration disturbance in sintering furnace unsettled green body, leads to collision breakage, thereby reduces the problem of green body fracture risk.

In a manufacturing method for manufacturing a dispersion body, a plurality of types of solid particles, water, and a liquid dispersant are mixed. In the manufacturing method, at least two types of the solid particles and at least one type of the dispersant that are selected based on a material type selection method are used, and at least an optimal amount of the dispersant that is determined based on an optimal amount determination method is added and mixed. The material type selection method is based on a Hansen solubility parameter distance to water, Hansen spheres of the solid particles, and a Hansen sphere of the dispersant.

The invention belongs to the technical field of ceramics, and relates to an AlN composite ceramic with a high-temperature wetting phase as well as a preparation method and application of the AlN composite ceramic. The preparation method of the AlN composite ceramic comprises the following steps: carrying out ball-milling mixing on AlN, an additive and praseodymium oxide, then drying, sieving, and carrying out dry pressing and isostatic pressing to obtain an AlN green body; the AlN green body is subjected to debonding treatment, and an AlN prefabricated body is obtained; carrying out high-temperature reaction on the AlN preform in an inert atmosphere to obtain a high-temperature wetting phase; and further raising the temperature to sinter and densify to obtain the AlN composite ceramic. The AlN ceramic device is prepared from praseodymium oxide, so that a high-temperature wetting phase uniformly-distributed three-dimensional network structure can be formed in the ceramic, and the mechanical property of the AlN ceramic is improved while the sintering densification of the AlN ceramic is promoted.

The proposed ceramic sinter body contains a first determined element, selected from five or six elements chosen from titanium (Ti), vanadium (V), zirconium (Zr), niobium (Nb), molybdenum, hafnium (Hf), tantalum (Ta), and tungsten (W); a second determined element, selected from yttrium (Y) and aluminum (Al); and elemental carbon (C). The total amount of the first determined element, the second determined element, and the elemental carbon contained in the ceramic sinter body is 98 atomic percent or more. The amount of the second determined element contained in the ceramic sinter body is 3,000 atomic ppm or less. The amount of carbon contained in the ceramic sinter body is 45 atomic percent or more and 55 atomic percent or less. The ceramic sinter body has a single-phase microstructure in which the first determined element forms a solid solution.

This invention discloses a low-temperature sintering method for aluminum nitride ceramics, belonging to the field of ceramic sintering technology. The method includes: Step S1: Preparation of composite powder – Aluminum nitride powder and bifunctional eutectic additive powder are uniformly mixed to form a mixed powder. The bifunctional eutectic additive powder includes metal fluorides, alkaline earth metal compounds, and rare earth oxides, with a total addition amount of 3-10 wt% of the aluminum nitride powder mass; Step S2: Molding – The above mixed powder is dry-pressed or cold isostatically pressed to obtain a green body; Step S3: Sintering – The green body is placed in an atmosphere sintering furnace and sintered under a nitrogen atmosphere; Step S4: Cooling – After sintering, the cooling rate is controlled within the grain boundary phase precipitation temperature range to optimize the crystallization morphology of the grain boundary phase, and then cooled with the furnace. This application utilizes a designed low-eutectic additive system to generate a large amount of effective liquid phase at 1450-1550℃, reducing the main sintering temperature to 1550-1650℃, which is more than 200℃ lower than the sintering temperature of traditional Y2O3 additives, resulting in significant energy savings and reduced consumption.

The invention relates to the technical field of preparation of silicon carbide ceramics, in particular to a silicon carbide ceramic setter plate based on a tape casting process, a preparation method and application of the silicon carbide ceramic setter plate based on the tape casting process. The thermal stress is eliminated in a dynamic process of forming a liquid phase of the auxiliary agent and rearranging matrix particles, so that the catalytic densification effect of the auxiliary agent is maximized, the abnormal growth of matrix grains at high temperature is avoided, the accurate regulation and control of the structure and the performance of the silicon carbide ceramic setter plate are realized, and the service life of the silicon carbide ceramic setter plate is prolonged. Meanwhile, a tape casting process is combined to provide a high-quality structural basis for the synergistic effect of matrix-additive-calcination, so that the silicon carbide powder and the composite additive form a uniformly-distributed microstructure in a green body, the synergistic effect of the silicon carbide powder, the composite additive and the green body is further strengthened, and the density uniformity, the mechanical strength, the high-temperature stability and the like of the large-size ultrathin load bearing plate are improved; the problem that a silicon carbide setter plate prepared through an existing method is prone to deformation and cracking at high temperature is solved.