6610 results about "Crucible" patented technology

The invention relates to a monocrystalline silicon thermal field multi-section dynamic cooperative heating control method and system, and the method comprises the following steps: constructing a thermal field multi-section temperature coupling model, dividing a thermal field into n axial heating sections, and building a dynamic relation between power input and temperature gradient; a deep reinforcement learning agent is designed, the state space of the deep reinforcement learning agent integrates the temperature of each heating section, the crystal lifting speed, the crucible lifting speed and the temperature gradient, and the action space outputs the power adjusting quantity of each heating section; defining a multi-target reward function, and jointly optimizing temperature gradient tracking, total power change and crucible bottom safety threshold; training the intelligent agent offline based on the thermal field model, and optimizing the strategy network; an intelligent agent is deployed online, and a power adjusting instruction is generated in real time; the control strategy is dynamically corrected, and online fine adjustment is performed through setting trigger adjustment. According to the method, the defects of a traditional method in the aspects of temperature gradient control precision, energy consumption economy and abnormal working condition self-adaptability are overcome, and the growth quality and efficiency of monocrystalline silicon are remarkably improved.

The invention provides an anti-gravity investment casting device suitable for titanium alloy and a casting method of the anti-gravity investment casting device, belongs to the field of titanium alloy casting, and solves the problems that an existing anti-gravity forming device has a sealing problem and a riser tube cannot be centered with a pouring gate inlet of a mold shell. Wherein the lifting structure can drive the mold assembly to move in the vertical direction, a mold shell in the mold assembly is located in the sand box, the sand box abuts against the top face of the flange sleeve, the flange sleeve is arranged on the mold support in a sliding and penetrating mode, and the upper pressing plate abuts against the upper portion of the sand box and is connected with the mold support. The water-cooled copper crucible is located below the riser tube, a flange structure is arranged at the upper end of the riser tube, the positioning and centering structure is used for enabling a pouring gate inlet of the mold shell and the riser tube to be coaxially arranged, the sealing structure comprises a first sealing ring and a second sealing ring, the first sealing ring is located between the flange sleeve and the flange structure, and the second sealing ring is located between the flange sleeve and the flange structure. The second sealing ring is located between the flange sleeve and the middle partition plate. According to the device, the pouring gate inlet of the mold shell can be centered with the riser tube, and the lower working tank is completely sealed.

The invention discloses a method for preparing asphalt-based porous carbon based on an MgO template, and belongs to the technical field of porous carbon, nano MgO and deionized water are mixed and placed in a synthesis kettle, hydrothermal synthesis is performed at 180 DEG C for 2 h, suction filtration and drying are performed, a dried filter cake is crushed and calcined, and porous flaky MgO is obtained; adding the asphalt solution into the MgO suspension, stirring, drying to obtain brown powder, transferring the brown powder into a corundum crucible, putting the corundum crucible into a tubular furnace, calcining to obtain a carbonized C / MgO composite material, and washing the carbonized C / MgO composite material with a diluted hydrochloric acid solution and deionized water to obtain a carbon material sample recorded as AC-75. Pouring the porous carbon material PCs and KOH into a mortar, fully grinding, mixing and calcining to obtain an activated product, pickling and washing the product to be neutral, and drying to obtain the porous carbon material PCs. The raw materials selected by the method are asphalt and flake magnesium oxide which are stable in performance, low in price, large in amount and easy to obtain, a magnesium source can be recycled, environmental protection is achieved, and resources are saved.

The invention relates to the technical field of cold crucible smelting furnaces, in particular to a magnetic suspension smelting device of a multi-station water-cooling crucible, which comprises a furnace chamber, an induction coil and a crucible, the top of the furnace chamber is provided with a furnace cover, the side part of the furnace chamber is provided with a furnace door and a vacuum system for vacuumizing the interior of the furnace chamber, and the induction coil and the crucible are arranged in the furnace chamber. The plurality of crucibles are arranged on a crucible support together, a driving device is arranged at the bottom of the crucible support, and the driving device can drive the crucible support to ascend, descend and rotate, so that the crucibles can enter and exit from the center of the induction coil in sequence. After the interior of the furnace chamber is vacuumized, multiple smelting operations can be carried out in the atmosphere of argon filling after a single vacuumizing state, the operation steps are simple and convenient, the middle actions such as multiple vacuumizing and vacuum breaking are omitted, in addition, only one vacuumizing device and one motor driving device are adopted in the whole device, continuous and automatic smelting can be achieved, and the production efficiency is improved. The production efficiency is greatly improved; and the cost is saved.

The invention provides a machine vision-based titanium alloy VAR smelting molten pool edge-reaching control method, which comprises the following steps: after calibration and correction by using an industrial camera, collecting the molten pool morphology of a vacuum arc remelting furnace VAR; the obtained molten pool landform picture is processed, and the molten pool topography surface gray level image is divided into a bright area, a gradual change area and a dark area; extracting a sub-pixel edge by using a Canny operator and a Zernike moment, and fitting a molten pool edge by using a least square circle fitting algorithm; subtracting the obtained crucible edge from the molten pool morphology edge, and calculating to obtain the distance from the molten pool edge to the crucible; and comparing the obtained distance from the edge of the molten pool to the crucible with a threshold value, and judging whether the molten pool reaches the edge or not. Visual judgment of operators is replaced with machine vision, dependence on artificial experience is reduced, titanium alloy VAR smelting control is simpler and more convenient, VAR smelting is more intelligent and automatic, product stability is improved, cost is reduced, and product competitiveness is improved.

The invention relates to the technical field of operation control, in particular to an unattended operation crucible loading and unloading operation control system and method based on visual processing, and the method comprises the following steps: monitoring a static accumulation value in a graphite powder fluidization conveying process in real time through a distributed static sensor; when the static accumulation value exceeds a safety threshold value, pulse type ion wind neutralization treatment is triggered, and a static balance material flow is generated; the dynamic alignment deviation of the stock bin and the crucible opening is calculated; the stepping angle and the rotating speed of a spiral auger in the stock bin are controlled based on the dynamic alignment deviation, and an axial vibration field is synchronously applied in the discharging process; the position of an air gap in a material is predicted based on a convolutional neural network, and a vacuum negative pressure value is dynamically adjusted to form a gradient suction mode. According to the device, the risks of powder agglomeration, conveying pipeline blockage or electrostatic discharge caused by electrostatic accumulation are effectively prevented, the safety of the conveying process is ensured, and meanwhile, the flowing stability of graphite powder is optimized.

The invention discloses alkali-activated porous carbon and a preparation method thereof, and relates to the field of new material preparation, and the preparation method comprises the following steps: uniformly mixing matrix carbon and a strong alkaline substance according to a mass ratio to obtain a mixed material, putting the mixed material into a crucible, and carrying out high-temperature calcination and cooling on the mixed material under the protection of an inert atmosphere; washing and filtering the mixed material subjected to high-temperature calcination for 3-6 times by using deionized water; after washing is completed, strong acid is used for soaking; and after soaking, filtering to obtain a mixed material filter cake, soaking the mixed material filter cake in ionized water, repeatedly washing, and drying until the pH value is neutral. The porous carbon material is prepared through alkali activation, the preparation steps are simple, expensive auxiliary equipment is not needed, the cost is low, preparation is safe, and the method has extremely high economic benefits and large-scale application prospects.

The invention provides an anti-corrosion ceramic sagger and a preparation method thereof.The anti-corrosion ceramic sagger comprises an aggregate layer and a matrix layer, and the aggregate layer is prepared from, by mass, 30-50 parts of yttrium-stabilized zirconia, 20-30 parts of silicon carbide and 15-25 parts of magnesium aluminate spinel; the matrix layer is prepared from the following raw materials in parts by mass: 40 to 50 parts of mullite micro powder, 30 to 40 parts of cordierite micro powder and 10 to 20 parts of binding agent. According to the anti-corrosion ceramic sagger and the preparation method thereof, by optimizing the raw material ratio and the preparation process, the corrosion depth is smaller than or equal to 0.19 mm after the sagger is soaked in the molten salt environment at 900 DEG C for 72 h, the service life is prolonged by 6-8 times compared with that of a traditional corundum sagger, and the anti-corrosion ceramic sagger has wide application prospects.

The embodiment of the invention provides a Czochralski method crystal growth device and a regulation and control method, and relates to the technical field of crystal growth. The Czochralski method crystal growth device comprises a furnace body, a crucible, a first magnetic field device, a seed rod and a second magnetic field device, the crucible is arranged in the furnace body, and the first magnetic field device is arranged on the outer side of the crucible in a surrounding mode and located in the furnace body. The seed rod is arranged in the furnace body and is spaced from the crucible; the second magnetic field device is arranged on the seed crystal rod and is positioned in the furnace body; wherein the first magnetic field device is used for generating a magnetic field and acting on a melt in the crucible; the second magnetic field device is used for generating a magnetic field and acting on a growth interface of the melt. The Czochralski method crystal growth device can effectively inhibit convection of melt, so that solute distribution is uniform, and crystal defects are reduced; and the crystal structure can be optimized, and accurate regulation and control of solute are realized, so that the quality and the performance of the crystal are integrally improved.

The invention provides a system and a method for off-line measurement of a cesium evaporation rate in a fusion device. The system comprises a vacuum chamber, a cesium crucible assembly, a heating assembly, a film thickness meter, a laser absorption spectrum system and a vacuum pumping unit. According to the invention, an ultrahigh vacuum environment is provided for the whole device including the vacuum chamber by using the vacuum pumping unit; then the cesium crucible and the conveying pipeline are heated through a heating assembly, so that effective evaporation of cesium is guaranteed, and deposition of cesium on the wall face of the pipeline is reduced; measuring the deposition thickness of cesium and the concentration of cesium atoms by using a film thickness meter and a laser absorption spectrum system, and checking the measurement results of the two diagnosis methods mutually; the cesium evaporation rate is measured, and the quantitative relation between the cesium evaporation rate and the heating temperature is obtained; and finally, a measurement system is transplanted into a negative ion source, and the cesium injection amount in the vacuum stage is monitored in real time. Effective data and technical support are provided for cesium flow control in the magnetic confinement nuclear fusion negative neutral beam injection system.

The invention relates to the technical field of fused salt purification, and provides a fused salt purification device and a fused salt purification method.The fused salt purification device comprises a heating furnace, heat insulation layers, a reactor, a sleeve, a gas inlet and outlet device and a crucible, the heating furnace is provided with multiple sections of heating areas in the height direction, and the heating areas are separated by the heat insulation layers and can independently control the temperature; the reactor is partially arranged in the heating furnace and extends into the multiple sections of heating areas, and the reactor is provided with a reaction cavity and a cavity opening communicated with the reaction cavity; the sleeve is placed in the reaction cavity from the cavity opening and covers the cavity opening, a placement cavity is formed in the sleeve, and the gas inlet and outlet device is communicated with the placement cavity and used for providing inert gas for the placement cavity; the crucible is placed in the containing cavity and used for containing the fused salt to be purified. After the to-be-purified fused salt is heated and melted, each section of heating area can be controlled from top to bottom to slowly cool, so that the fused salt is solidified from top to bottom, purification is completed, impurities flow to the bottom of the crucible, the upper-layer purified fused salt is obtained, and the structure is simple.

The invention discloses a long-life alumina crucible as well as a preparation method and application thereof. The raw material composition of the alumina crucible comprises pretreated quartz particles; the pretreated quartz particles are obtained through a pretreatment process; according to the pretreatment process, the surfaces of fused quartz particles are coated with a modifier through a granulation process, and the pretreatment process specifically comprises the steps that the fused quartz particles, the modifier and a binding agent are mixed, granulated and dried, and pretreated quartz particles are obtained. The fused quartz particle raw material is subjected to modification pretreatment, so that the crystallization behavior of fused quartz is reduced or inhibited, the stability of the fused quartz particles in the crucible firing and high-temperature service process is improved, and the binding property of the fused quartz particles and the fine powder component is enhanced, so that the mechanical properties such as breaking strength and fracture toughness of the alumina crucible are improved; therefore, the service life and the stability of the crucible are improved, and the performance of the alumina crucible can completely meet the requirement of the service life under extreme conditions in the fields of rare noble metal smelting and the like.

The invention belongs to the technical field of vacuum coating, and particularly relates to a vacuum coating machine electron gun control method and system.The control method comprises the steps that in the coating process, key real-time parameters reflecting the working state of an electron gun and the evaporation process are continuously collected and fused, and the current coating state is evaluated in real time based on the key real-time parameters; and in combination with preset coating process requirements, an electron beam control target instruction set of a next control period is dynamically generated through a built-in decision mechanism and is sent to a power controller, a focusing coil controller and a scanning coil controller of the electron gun, and the electron gun is driven to adjust the power output, the focusing state and the scanning motion of the electron gun in real time. Through accurate and stable control of the evaporation rate, material characteristic changes are effectively coped with through a strong closed loop of power and the evaporation rate; the dynamically planned scanning path can actively compensate the non-uniformity of the thermal field of the crucible, and beam spot energy distribution is optimized in combination with focusing adjustment, so that the uniformity of the thermal field is remarkably improved.

The invention discloses a low-smoke flame-retardant cable outer layer material, and a preparation method of key components and a high-entropy alloy nano material comprises the following steps: grinding cerous nitrate, ferric nitrate, manganous nitrate, sodium hexahydroxyplatinate and copper nitrate into particles according to a ratio of 2: 1: 1: 1: 1; then adding 10-20 times by mass of a 32% tannic acid solution and 5-8 times by mass of a 10% glutaraldehyde solution, carrying out an oil bath at 65-70 DEG C for a reaction for 4-8 h, then carrying out overnight vacuum freeze drying to obtain mixed powder, placing the mixed powder in a crucible of a muffle furnace, then calcining the mixed powder at 1000-1200 DEG C under the protection of nitrogen flow for 4-10 h, and finally cooling the calcined mixed powder to room temperature. And cooling. The prepared outer layer material for the cable overcomes the defects that a conventional cable easily releases a large amount of toxic smoke during combustion, is poor in flame retardant property and contains halogen to pollute the environment.

The invention provides a silicon carbide crystal growth process which comprises the following steps: A) dividing the interior of a crucible into seven loading areas, namely an F area, a D area, a B area, an A area, a C area, an E area and a G area which are adjacent in sequence by adopting graphite partition plates, filling silicon carbide powder in each loading area, and placing the graphite partition plates perpendicular to the bottom surface of the crucible; the particle size of the silicon carbide powder is 10-80 meshes; and B) fixing a seed crystal on the top of the crucible filled with the silicon carbide powder, and growing the silicon carbide crystal by adopting a PVT method. By optimizing the charging process, the uniformity and the utilization rate of sublimation gas of the powder in the growth process can be improved, the stability of a temperature field in a furnace is facilitated, the probability of crystal phase change is reduced, crystal defects (phase change, polycrystal, dislocation and the like) are reduced, and thus the crystal quality is improved.

The invention discloses a nickel-magnesium intermediate alloy for a high-temperature alloy and a preparation method thereof.The nickel-magnesium intermediate alloy is composed of, by mass, 4%-50% of Mg and the balance Ni and inevitable impurities, and the method comprises the steps that firstly, electrolytic nickel and magnesium ingot raw materials are selected, cut and polished, and ingredients are calculated, weighed and subpackaged; 2, the raw materials are put into a crucible of an induction melting furnace to be smelted, and alloy melt is obtained; and thirdly, a steam suction filtration system is started, the alloy melt is poured into a cast iron ingot mold, and the nickel-magnesium intermediate alloy ingot is obtained after cooling. A proper amount of inert gas is introduced in the vacuum induction smelting process, smelting and pouring in a micro-negative pressure state are guaranteed, impurity introduction in the smelting and pouring processes is reduced by controlling smelting process parameters, meanwhile, gasification loss of the magnesium element is reduced, and the high-strength magnesium alloy with uniform components and high strength is obtained. The nickel-magnesium intermediate alloy is high in cleanliness and low in content of harmful gas elements and inclusions, and is suitable for the field of downstream high-temperature alloys.

The invention relates to the technical field of photovoltaics, in particular to a method for testing the grafting rate of silane grafted polyolefin for a photovoltaic packaging adhesive film. Comprising the following steps: S1, extracting a silane grafted polyolefin grafting material in an organic solvent to remove unreacted silane or residual peroxide, washing for multiple times after extraction is completed, and drying for later use; and S2, weighing and recording the mass of the crucible and the extracted silane grafted polyolefin colloidal particles, then putting the crucible filled with the colloidal particles into TGA for calcination, weighing the total mass of the crucible and the sample after calcination is finished, and converting the relative grafting rate by using the ash content of the TGA. According to the invention, the grafting rate of silane grafted polyolefin can be timely and effectively tested and evaluated, so that the grafting stability in the grafting material production process can be truly reflected. Meanwhile, the grafting rate testing method is high in efficiency, simple and reliable to operate.

The invention discloses a nickel-based powder superalloy powder-state return scrap recycling and remelting method which comprises the following steps: packaging powder-state return scraps by using a metal foil bag, putting the packaged powder-state return scraps into a crucible of a vacuum induction melting furnace, vacuumizing, and carrying out low-power power transmission melting; gradually adding the packaged powder-state return scrap into the crucible or adding the packaged powder-state return scrap into the crucible by several times until the packaged powder-state return scrap is completely added into the crucible, and carrying out full-power power transmission smelting; after melting the melt, heating to a refining temperature, increasing the vacuum degree, and refining; carrying out electromagnetic stirring on the refined powder-state return scrap melt, and then cooling to a pouring temperature; and the powder-state return scrap melt is poured into a steel mold after being subjected to slag blocking through a slag blocking plate and filtered through a two-stage filter, and a powder-state return scrap remelting master alloy ingot is obtained. According to the method, the 100% powder state return scrap is directly adopted for smelting, and the content of oxygen, nitrogen and hydrogen elements in the prepared 100% powder state return scrap remelting ingot is low.

The invention belongs to the technical field of vacuum melting furnaces, and discloses an alloy vacuum melting furnace which comprises a melting furnace body, a sliding lifting frame is installed in the melting furnace body, a rotating electric crucible is installed at the upper end of the lifting frame, a feeding opening is formed in the upper end of the melting furnace body, and a feeding sealing cover is installed at the upper end of the feeding opening. A flow guide disc is fixedly mounted on the side surface of the lower end of the lifting frame, a flow guide opening is formed in the side surface of the lower end of the flow guide disc, a drainage opening is formed in the outer side surface of the smelting furnace body, and a cooling mechanism is arranged on one side of the smelting furnace body. The vacuum degree loss and the cooling waiting time in the cooling and discharging process are reduced in a continuous closed transfer mode, so that the purpose of continuous and efficient smelting is achieved. According to the alloy vacuum melting furnace, in the process that the lifting motor drives the electric crucible to ascend, the mode that the angle gear is meshed with the angle toothed bar is utilized, and the electric crucible automatically turns over to pour molten alloy.

The invention discloses a preparation method for preparing a biomass porous carbon material through high-temperature carbonization of molten salt and application of the biomass porous carbon material, and belongs to the technical field of synthesis of inorganic functional materials. According to the technical scheme, the method is characterized in that sodium chloride and potassium chloride are mixed into mixed salt according to different proportions, then the mixed salt is mixed with enteromorpha biomass according to a certain proportion, the mixture is placed in a porcelain crucible, the mixed salt is added for covering, the porcelain crucible is placed in a muffle furnace to be heated and carbonized, and the porous biomass carbon material is obtained after water washing and drying. The enteromorpha biomass is selected as the raw material, the operation is simple and controllable, the cost is low, batch production can be realized, and the prepared novel porous biomass carbon material has a complex porous structure, a large specific surface area, a very good catalytic effect, strong adsorption capacity and good conductivity, and shows excellent performance when being applied to the field of advanced oxidation.

The invention relates to a method for driving impurity iron to enrich and purify aluminum alloy return scrap and a product, the aluminum alloy return scrap is placed in a crucible, is heated in a resistance furnace and is subjected to heat preservation for a period of time, so that the return scrap is fully molten, and a melt is obtained; continuously preserving the heat of the melt, connecting two parallel electrodes with a pulse power supply, vertically inserting the two parallel electrodes into the melt, and preheating for a period of time; setting a first pulse voltage, a first pulse current and a first pulse frequency according to the impurity iron content of the aluminum alloy return scrap; second pulse voltage, second pulse current and second pulse frequency are set according to different heat preservation temperatures during melt electric pulse treatment, and electric pulse treatment is applied to the melt for a period of time in the heat preservation stage; and closing the resistance furnace and the pulse power supply after treatment, and cooling the melt along with the furnace to obtain a sample. The method effectively solves the problem of malignant accumulation of impurity iron elements in the aluminum alloy resource recycling process. The method is short in treatment time and high in iron removal efficiency, and the production cost can be greatly reduced.

The invention discloses a high-throughput preparation method of an alloy material based on centrifugal supergravity solidification. The method comprises the steps that alloy raw materials are put into a smelting furnace to be subjected to vacuum smelting and pouring, and a cast ingot is obtained; the cast ingot is sequentially subjected to linear cutting, mechanical grinding, ultrasonic cleaning and constant-temperature drying, and an alloy original material of the super-gravity prepared alloy is prepared; processing the original alloy material into a block cast ingot and putting the block cast ingot into a crucible; placing the crucible in a centrifugal supergravity casting furnace; carrying out supergravity solidification on the block cast ingot in the crucible by utilizing a centrifugal machine and a centrifugal supergravity casting furnace; and finally taking out the block cast ingot to obtain a solidified alloy sample. The device is simple in structure, easy to operate and high in safety coefficient, and alloy samples with alloy components and microstructures in gradient distribution in the supergravity direction can be obtained.

The invention relates to the technical field of nano metal production, and particularly discloses a crucible liquid level height measuring method and a crucible liquid level height measuring device.The crucible liquid level height measuring method comprises the following steps that a cooling jacket is arranged outside a crucible, cooling water is introduced, after the water amount is stable, the crucible and the cooling jacket are weighed through a sensor, and the crucible liquid level height is measured; obtaining a weight value a; equipment works, evaporation of the metal raw materials is reduced, and a real-time weight value c is obtained; and according to the formula, the liquid level remaining height = ((c-a) / liquid metal density) / crucible bottom area, the liquid level remaining height in the crucible is calculated, and the feeding time is judged according to the liquid level remaining height. The crucible liquid level height measuring device comprises a vacuum container, a crucible and a weighing sensor are arranged in the vacuum container, and the crucible is placed above the weighing sensor. The metal powder manufacturing device has the effect of accurately judging the feeding time when metal powder is manufactured.

The present invention relates to the technical field of gallium oxide crystal growth, and in particular to a thermal field structure and a device and method for preparing gallium oxide single crystals based on a guided mold method. The present invention changes the inner cavity at the bottom of the thermal field structure from a circular cavity to an elliptical cavity, so that the thermal field structure in the width direction of the mold extends toward the mold side, thereby improving the thermal insulation of the thermal field structure on both sides of the mold, and then prompting the mold core to move closer to the edges on both sides of the mold, ensuring the constant temperature gradient on the mold surface during the shouldering process of the crystal, avoiding temperature differences, and improving production efficiency. In addition, since the extended thermal field structure will make the air inlet airflow closer to the mold surface, resulting in the problem of cold airflow directly blowing the crystallization area on the mold surface, a drainage port is added below the air inlet to guide the cold airflow to the crucible position, thereby ensuring the effect of the mold core moving closer to the edges on both sides of the mold.

The invention discloses die steel powder with high corrosion resistance. The die steel powder comprises the following chemical components in percentage by mass: 17.0%-18.5% of Ni, 8.0%-9.5% of Co, 4.5%-5.0% of Mo, 1.8%-2.5% of Cr, 0.4%-0.7% of Cu, 0.06%-0.12% of Y, 0.6%-0.9% of Ti, 0.06%-0.12% of Al and the balance of Fe. The invention further discloses a gas atomization preparation method of the high-corrosion-resistance die steel powder. The gas atomization preparation method comprises the following steps: (1) burdening and charging; (2) vacuumizing and gas replacement; (3) staged smelting: carrying out medium-frequency induction heating on the smelting crucible, raising the temperature to 1650-1720 DEG C at the speed of less than or equal to 10 DEG C / min, and keeping the temperature for 15 minutes after the matrix alloy is molten; adding high-purity elemental metals of Y, Ti and Al elements through a secondary feeding device 5-8 minutes before pouring is started, and realizing uniform diffusion of the elements by matching with argon covering and stirring; (4) argon atomization; and (5) powder post-treatment. According to the powder, the corrosion resistance is greatly improved by reasonably designing the components and the percentage thereof. According to the powder obtained through the gas atomization preparation method, the corrosion resistance is larger than or equal to 700 hours, the oxygen content is smaller than or equal to 50 ppm, the density is larger than 99.8%, and therefore the requirements of high-end optical molds are met.

The invention provides a solid-to-liquid ratio detection method, device and equipment for re-feeding of a granular silicon material and a storage medium. The method comprises the following steps: respectively shooting the liquid level of a crucible into which a granular silicon material is put by adopting different exposure degrees to obtain a first exposure degree image and a second exposure degree image, determining a liquid area in the first exposure degree image, determining a solid area in the second exposure degree image, and determining the solid area in the second exposure degree image; determining an area ratio of a solid region in the second exposure image to a liquid region in the first exposure image as a solid-to-liquid ratio of the liquid level; according to the method, the detection accuracy of the solid-to-liquid ratio is improved for re-feeding of the pure particle silicon material.

The utility model relates to the technical field of heating furnaces, in particular to an alloy vacuum furnace which comprises a furnace body and a heating mechanism arranged in the furnace body, the heating mechanism comprises a plurality of annular heating pieces, the annular heating pieces are divided into top heating pieces, bottom heating pieces and a plurality of middle heating pieces, the bottom heating pieces are fixedly connected with the inner wall of the furnace body, and the middle heating pieces are fixedly connected with the furnace body. The top heating piece and the middle heating piece move in the height direction of the furnace body through a vertical adjusting mechanism, the vertical adjusting mechanism comprises a screw rod and a connecting block, the connecting block is fixedly arranged on the periphery of the top heating piece, the screw rod is arranged in the height direction of the furnace body, and the upper end of the screw rod is in threaded connection with the connecting block; the lower end of the screw penetrates through the furnace body and is fixedly connected with an output shaft of a transmission motor arranged at the bottom of the furnace body. According to the alloy vacuum furnace, by adjusting the heating piece, the heating range of the heating piece is matched with the height of alloy contained in the crucible, heat energy of the heating piece is concentrated to heat the alloy, and the heat energy utilization rate is increased.

The invention belongs to the field of synthesis of inorganic non-metallic materials, and particularly relates to an equimolar-ratio seven-element high-entropy oxide and a preparation process thereof. The preparation process comprises the following steps: putting seven oxide powder Al2O3, Y2O3, TiO2, ZrO2, NiO, CuO and CeO2 into a ball milling tank according to a molar ratio of 1: 1: 2: 2: 2: 2: 2: 2, adding absolute ethyl alcohol and zirconium oxide grinding balls, performing ball milling in a ball mill, and fully drying and sieving after ball milling to obtain mixed powder; carrying out tabletting treatment on the mixed powder to obtain a to-be-sintered green body; and putting the to-be-sintered green body into an alumina crucible, and putting the alumina crucible into a microwave oven for microwave sintering. According to the method, the equimolar-ratio seven-element high-entropy oxide (AlYTiZrNiCuCe) Ox with good solid solution is obtained, the crystallinity and element uniformity of the seven-element high-entropy oxide are improved, all the raw materials react completely, meanwhile, the process efficiency is high, and energy consumption is low.

The invention relates to the technical field of high-temperature alloy preparation, and discloses a method for preparing nitrogen-containing cobalt-chromium-molybdenum alloy by a two-chamber vacuum induction furnace, which comprises the following specific steps: step 1, preparing materials according to components of the nitrogen-containing cobalt-chromium-molybdenum alloy; step 2, sequentially arranging a Si layer, a Mo layer, an N layer, a Cr layer and a Co layer from the bottom of the crucible to the top; and step 3, vacuum melting: S1, vacuumizing treatment; then filling nitrogen; s2, heating and melting, wherein the power of a smelting chamber is set to be 340-360 KW; the power of the smelting chamber is set to be 180-200 KW, and heat preservation refining is carried out; s3, power failure and standing; s4, electrifying again, and adding Mn into the molten steel when the power of the smelting chamber is increased to 300KW; and 4, pouring is conducted, specifically, pouring is started when the temperature of the molten steel rises to 1520-1530 DEG C. The nitrogen-containing cobalt-chromium-molybdenum alloy which is smooth in surface and free of pores inside can be prepared.

The invention provides a combined crucible and an oxide crystal growth method.The combined crucible is used for oxide crystal growth and comprises a first ceramic crucible, a second ceramic crucible, a third ceramic crucible and a fourth ceramic crucible, the graphite layer is arranged in the first ceramic crucible; the second ceramic crucible comprises a second containing space with the top open and the bottom closed, and the second ceramic crucible is arranged in the graphite layer. The combined crucible is designed by adopting an iridium-free scheme, so that the cost of the crucible can be greatly reduced.