423 results about "Quartz crucible" patented technology

The invention discloses a method for preparing ultra-high-purity quartz by multi-stage synergistic purification of quartz ore, and belongs to the technical field of ultra-high-purity quartz preparation. According to the method, natural quartz ore is used as a raw material, mineral impurities, lattice impurities and inclusions in quartz are deeply removed through multi-stage synergistic processes such as low-temperature plasma activation, biological leaching, supercritical CO2-assisted acid leaching, microwave-assisted chloridizing roasting and pulsed electric field enhanced acid leaching, and finally a high-purity quartz product with the SiO2 purity larger than or equal to 99.998% (4N8 grade) is obtained. According to the invention, a low-temperature plasma activation technology, microbial metallurgy, supercritical fluid extraction and a pulsed electric field strengthening technology are organically combined, so that the energy efficiency bottleneck and environmental protection limitation of a traditional high-purity quartz preparation process are broken through; the obtained quartz sand product can reach the standards of high-purity quartz sand for semiconductor quartz glass and high-purity quartz sand for photovoltaic quartz crucibles.

The invention discloses a global scanning image splicing and defect positioning system for an ultra-large-diameter quartz crucible, and relates to the technical field of quartz crucibles, and the system comprises a scanning control module which constructs a fusion model through multiple sensors, evaluates a risk coefficient, obtains the fusion model, dynamically plans a multi-arm path of a robot based on reinforcement learning, and sends the multi-arm path of the robot; adaptively adjusting the acquisition frequency of the corresponding area based on the risk coefficient, and outputting multi-modal data through a multi-round feedback iteration optimization acquisition process; the image splicing module is used for acquiring multi-modal data for local splicing, and generating a panoramic image in combination with a multi-arm path of the robot; the defect positioning module is used for constructing a quartz crucible model through the panoramic image, detecting defects in a layered manner by utilizing a YOLOv5 model, tracking the defects through extended state Kalman filtering, quantifying the defect volume and the hazard level by combining point cloud semantic segmentation, and performing 3D positioning and evaluation on the defects; the output data is ensured to always meet the subsequent image splicing and defect positioning requirements, and the system stability is guaranteed.

The invention provides a corrosion-resistant and high-temperature-resistant composite quartz crucible and a preparation method thereof. The quartz crucible sequentially comprises the following laminated layers in parts by weight from inside to outside: 50-100 parts of an inner layer, 200-400 parts of a transition layer, 150-250 parts of a reinforcing layer and 40-80 parts of an outer layer, the preparation method comprises the following steps: forming layer by layer: sequentially adding inner-layer slurry, transition-layer powder, a reinforcement-layer prefabricated member and outer-layer slurry into a mold for forming; gradient drying is conducted, specifically, the formed crucible blank is put into a drying box to be subjected to gradient drying; and step-by-step sintering: putting the dried crucible blank into a high-temperature sintering furnace, carrying out step-by-step sintering, and cooling and demolding to obtain a crucible product. A composite protection system is designed and constructed through four layers of functionally graded materials, the prepared composite quartz crucible has excellent high temperature resistance, corrosion resistance and structural stability and can be applied to large-size semiconductor single crystal furnaces, and the engineering advantage of the preparation process is remarkable.

The invention relates to a quartz crucible coating and a preparation method thereof.The coating is of a double-layer composite structure and comprises a substrate layer and a functional layer, the substrate layer is composed of 40-65 vol% of polycrystalline silicon powder (the particle size D50 ranges from 1 micrometer to 5 micrometers) and 35-60 vol% of nanometer silica sol, and the functional layer covers the surface of the substrate layer and is composed of 50-70 vol% of polycrystalline silicon powder, 20-35 vol% of nanometer silica sol and 5-15 vol% of calcium fluoride powder (the particle size D90 is smaller than 0.5 micrometer). The preparation method comprises the following steps: preparing a substrate layer slurry and a functional layer slurry, sequentially coating the inner wall of a crucible with the slurry, drying, and sintering in an inert atmosphere according to a three-step temperature control program to finally form a coating with the thickness of 180-300 microns and the porosity of 8-15 vol%; the coating structure can avoid pollution of silicon nitride or silicon carbide particles, has excellent demolding performance, thermal stability and adhesive force, further improves the service life of a crucible and the purity of a silicon ingot, and meets the requirements of an advanced semiconductor process for cleanliness and reliability.

The invention discloses an intelligent visual full-inspection system for delivery quality of a quartz crucible, and belongs to a quartz crucible quality inspection technology. The method comprises the following steps: acquiring a two-dimensional surface image and a two-dimensional layered image of a crucible through first equipment and second equipment; the data acquisition unit acquires the data and is used for providing data basis for the defect detection unit and the microbubble detection unit. The defect detection unit needs to detect a plurality of defect categories, so that the defect detection model is constructed according to an improved YOLOv11 model; the bubble detection model of the microbubble detection unit can detect only one type of defects, and the bubble detection model is constructed according to a YOLOv11 model. Therefore, the overall overhead of the system is reduced while the detection precision is guaranteed. The transparent layer bubble detection unit eliminates repeatedly counted bubbles through similar bubble fusion, so that the reliability of the number of the bubbles is guaranteed; the visual unit fuses physical parameters and visual data, and provides reliable basis for crucible quality evaluation.

The invention provides a quartz crucible performance detection method based on a high-temperature drawing process. The quartz crucible performance detection method comprises the following steps: S1, selecting a quartz crucible sample from a batch of prepared quartz crucibles; s2, sampling the quartz crucible sample to obtain a sample block to be experimented; s3, slicing the sample block along the longitudinal direction of the quartz crucible to obtain a first sample wafer, and photographing the first sample wafer to obtain microbubble data of the first sample wafer; s4, cleaning and drying the sliced sample blocks; s5, the dried sample blocks are heated and calcined, and heating and calcining parameters are designed according to parameters in the crystal pulling process; s6, slicing the calcined sample block along the longitudinal direction of the quartz crucible again to obtain a second sample wafer, and photographing the second sample wafer to obtain microbubble data of the second sample wafer; and S7, based on the microbubble data of the first sample wafer and the microbubble data of the second sample wafer, obtaining a performance detection result of the batch of quartz crucibles so as to improve the accuracy of crucible performance detection.

The invention provides a quartz crucible crushing device and method.The quartz crucible crushing device comprises a vibration platform, a clamping assembly and a knocking assembly, the vibration platform is used for placing a carbon-carbon crucible with a quartz crucible, the outer side wall of the carbon-carbon crucible is placed on the vibration platform, and the clamping assembly is used for clamping the carbon-carbon crucible; the clamping assemblies are oppositely arranged on the two sides of the vibration platform and used for clamping the carbon-carbon crucible, and the knocking assembly is arranged on the side, not provided with the clamping assemblies, of the vibration platform, can move along the inner side wall of the quartz crucible and is used for knocking the inner side wall of the quartz crucible. The automatic crushing device has the beneficial effects that automatic crushing of the quartz crucible is achieved in a knocking and vibrating mode, the crushing effect is guaranteed, the working intensity is reduced, potential safety hazards are reduced, the working efficiency is improved, damage to the carbon-carbon crucible is reduced, and the service life of the carbon-carbon crucible is prolonged.

The quartz crucible surface grinding equipment comprises a grinding table, two limiting rotating mechanisms, a first grinding mechanism and a second grinding mechanism, a supporting plate is arranged on the grinding table, a driving part is arranged on the supporting plate, one limiting rotating mechanism is connected with the output end of the driving part, and the other limiting rotating mechanism is connected with the output end of the driving part. The other limiting rotating mechanism is arranged on the grinding table through a supporting seat, and the two limiting rotating mechanisms are symmetrically arranged up and down; a first sliding table module is arranged on the grinding table, and a sliding plate is arranged on a sliding table of the first sliding table module; the first grinding mechanism is arranged on the sliding plate and located on one side of the limiting rotating mechanism, a second sliding table module is arranged on the grinding table, and a sliding frame is arranged on a sliding table of the second sliding table module; the second grinding mechanism is arranged on the sliding frame and located on the opposite side of the first grinding mechanism. Therefore, synchronous grinding of the inner wall and the outer wall of the crucible can be achieved, only one-time clamping is needed, and operation is convenient and fast. And the polishing range completely covers the inner wall, the outer wall and the bottom surface of the crucible, and the polishing efficiency is remarkably improved.

The invention provides a multi-melting-machine collaborative vacuumizing control system and control method, and belongs to the technical field of quartz crucible manufacturing, the multi-melting-machine collaborative vacuumizing control system comprises a main controller, a main vacuumizing assembly, a plurality of branch vacuumizing assemblies and a plurality of melting machines; the main vacuumizing assembly is connected with the multiple branch vacuumizing assemblies through the vacuum main pipeline, and the multiple branch vacuumizing assemblies are connected with the multiple melting machines in a one-to-one correspondence mode through the melting machine connecting vacuum pipes. The main vacuumizing assembly comprises a vacuum pump, a first pneumatic valve, a first proportional electromagnetic valve, a vacuum tank and a vacuum main valve which are connected in sequence; the branch vacuumizing assembly comprises a vacuum proportion regulating valve, a buffer tank and a vacuumizing valve which are connected in sequence; a vacuum tank is arranged, and the vacuum pressure in the vacuum tank is kept constant by controlling a first pneumatic valve and a first proportional electromagnetic valve; the buffer tanks are arranged on the branches, and the vacuum pressure in the buffer tanks is controlled by the vacuum proportioning valves to be kept constant, so that a stable vacuum system is formed in the melting process of the quartz crucible.

The utility model relates to the technical field of quartz crucible production related equipment, and discloses a quartz crucible mold convenient to demold, which comprises an upper mold and a lower mold, a connecting rod is arranged above the upper mold, through holes are respectively arranged between the front and rear side walls and the left and right side walls of the connecting rod, and the through holes are communicated with the upper mold and the lower mold. Vertical plates corresponding to the through holes are arranged above the lower die, and limiting rods are connected between the vertical plates and the corresponding through holes in an inserted mode. A second through hole is formed in the lower portion of the lower die, an electric telescopic rod is connected to the lower portion of the lower die, a horizontal plate is connected to the lower end of the electric telescopic rod, and an ejector rod inserted into the second through hole is arranged above the horizontal plate. A base is arranged below the lower die, a motor is arranged on the vertical side of the base, the output end of the motor is connected with a connecting piece, the lower die is connected with the connecting piece, and a spray head is arranged on the base. Compared with the prior art, the mold has the advantages that demolding is convenient, and residues are convenient to clean.

The utility model discloses angle-adjustable quartz crucible cleaning equipment which comprises a rack body, a first cavity and a second cavity located below the first cavity are formed in the rack body, a mounting plate is arranged in the first cavity, and a quartz crucible bracket is hinged to the mounting plate; a quartz crucible is fixed on the quartz crucible bracket, and an adjusting mechanism for adjusting the horizontal angle of the quartz crucible bracket is arranged in the second cavity. Compared with the prior art, workers do not need to watch beside the quartz crucible, operators do not need to manually discharge corrosion liquid medicine filled with the quartz crucible, the cleaning time is set and controlled by the central controller to be automatically completed, a large amount of labor is saved, and meanwhile casualties are avoided.

The invention discloses a single crystal furnace induction heater which is characterized by comprising a melt, a quartz crucible, a crucible side, an induction heater coil, a crucible core, a support rod and a furnace chassis, the melting body is supported in the quartz crucible, the quartz crucible is supported in the crucible side, the crucible side is provided with the crucible core, the induction heater coil is arranged on the peripheral wall of the crucible side, the furnace base plate is provided with a support rod hole, and a support rod is connected with a lower shaft through the furnace base plate. Eddy current heating is directly generated in a workpiece through electromagnetic induction, the target temperature can be achieved within a few minutes, the energy utilization rate can reach 90% or above, energy consumption is reduced, contact-free heating is achieved, safety performance is improved, easily-damaged and easily-consumed parts are avoided, the operation and maintenance service life is long, and the use cost of a single crystal thermal field is reduced.

The utility model belongs to the technical field of crucibles, and particularly relates to a perovskite evaporation source crucible assembly which comprises a quartz crucible with an opening at one end, at least one heat conduction piece arranged in the quartz crucible and a filtering piece arranged in the quartz crucible and located above the heat conduction piece. And the filtering piece covers the upper opening of the quartz crucible. According to the utility model, through the arrangement of the honeycomb-shaped heat conduction member and the filtering member, the original perovskite raw material is easier to volatilize, the loss of heating power is reduced, the time for stabilizing the deposition rate is shortened, and the large-scale mass production is facilitated; the filter screen is additionally arranged, so that raw materials are more conveniently prevented from splashing to pollute other raw materials, large blasting-boiling particles can be filtered out and splashed to a substrate in the evaporation process, a film layer grows finer and smoother, the quality is better, and defects caused to the film layer are avoided.

The invention belongs to the technical field of high-temperature-resistant containers, and provides a quartz crucible preparation method and a quartz crucible. The preparation method of the quartz crucible comprises the following steps: preparing the matrix; the base body is subjected to heating pretreatment; coating the inner wall of the substrate with a barium solution; sintering to form a barium silicate prefabricated layer on the inner wall of the substrate; and barium carbonate powder is scattered on the barium silicate prefabricated layer to form a barium silicate protective layer. According to the quartz crucible prepared by the quartz crucible preparation method provided by the invention, the barium silicate protective layer in the quartz crucible can effectively prevent a product to be prepared from corroding the quartz crucible.

The invention relates to the technical field of semiconductor material preparation, in particular to a quartz crucible and a preparation method thereof, and a preparation method of a large-size N-type silicon rod. The quartz crucible comprises a quartz crucible body and a doping material dispersed in the quartz crucible body. According to the quartz crucible, the doping material is directly and uniformly dispersed in the base material of the quartz crucible body, so that the doping agent is continuously, controllably and uniformly released in the high-temperature silicon melting process.

The invention relates to the technical field of image visual angle analysis, and particularly discloses a quartz crucible bubble group multi-visual angle three-dimensional reconstruction and dynamic analysis system, which is characterized in that an optical imaging device and a sound wave transmission imaging device are arranged outside a quartz crucible, and boundary contour data and bubble internal structure data of bubbles in the crucible are sequentially acquired; further constructing a three-dimensional model of bubbles in the quartz crucible, separating and identifying the bubbles, and obtaining key feature information of each bubble; in a time sequence of continuous acquisition and modeling, the growth rate of each bubble is calculated in real time, and the aggregation behavior and the fracture sign of a bubble group are monitored; by setting the abnormal judgment threshold and predicting and early warning the potential risk in the bubble group, the effectiveness of the data is remarkably improved, and the monitoring means of the bubble behavior is innovated, so that the production process is optimized, the material quality is improved, and the potential safety hazard and economic loss caused by the bubble defect can be remarkably reduced.

The invention provides a founding method for improving micro-bubbles of a transparent layer of a quartz crucible, and belongs to the technical field of quartz crucible production, and the founding method comprises the following steps: S1, pouring outer-layer quartz sand into a mold, and molding the outer-layer quartz sand through a molding device; s2, the mold is put into a melting furnace, and the formed outer-layer quartz sand is heated through an electric arc method to be melted; s3, stopping heating after the outer-layer quartz sand is completely melted, and completely cooling and solidifying the outer-layer quartz sand into a quartz crucible primary blank; s4, fully melting the high-purity quartz sand into a liquid state through a quartz sand melting device, and uniformly spraying the liquid-state high-purity quartz sand on the inner surface of the quartz crucible primary blank through a feeding mechanism; and S5, carrying out secondary arc ignition heating on the mold, so that the liquid-state high-purity quartz sand is tightly combined with the quartz crucible primary blank, and the melting of the quartz crucible is completed. High-purity quartz sand for manufacturing the transparent layer is completely melted through the quartz sand melting device, so that gas-liquid inclusion in the sand is fully removed, and micro-bubbles of the transparent layer of the quartz crucible are effectively improved.

The utility model discloses a device for preparing a quartz crucible, which comprises a die and a water jacket arranged outside the die, the upper parts of the die and the water jacket are open, a first cavity is formed between the bottom of the die and the bottom of the water jacket, a second cavity is formed between the side wall of the die and the side wall of the water jacket, and the first cavity is communicated with the second cavity. The first cavity and the second cavity are communicated with each other, the bottom of the water jacket is provided with an extraction opening which is communicated with the first cavity and the external space of the water jacket, the extraction opening is communicated with external evacuation equipment, an extraction assembly is arranged between the mold and the water jacket, and the extraction assembly is communicated with the mold. The air exhaust assembly comprises a plurality of air inlets, an air outlet and an airflow channel enabling the air inlets to communicate with the air outlet, the air inlets are formed in the second cavity, and the air outlet communicates with the air exhaust opening. The quality of a bubble depletion layer formed on the inner wall of the quartz crucible is improved.

This invention provides an electrode device having a support for engaging and holding a graphite electrode used in the manufacture of a quartz crucible via arc discharge. The electrode device is characterized in that the outermost surface layer of the support, at the portion adjacent to the graphite electrode when the support is engaged with the graphite electrode, has an anti-fouling film. Thus, an electrode device is provided that can suppress contamination from the support, shorten the lifespan of the graphite electrode, and reduce manufacturing costs.

The utility model discloses a copper rod for melting a quartz crucible, an electrode device and a melting and casting furnace, and relates to the technical field of quartz crucible preparation, the copper rod comprises a copper rod body, a liquid inlet pipe and a liquid outlet pipe orifice; an accommodating cavity is limited by the copper rod body; the liquid inlet pipe extends into the containing cavity, the liquid inlet pipe extends from one end of the containing cavity to the other end of the containing cavity and is communicated with the containing cavity, the outer wall of the liquid inlet pipe is provided with a splitter plate, the splitter plate is distributed in the axial direction of the liquid inlet pipe in a spiral shape, and the splitter plate is attached to the inner wall of the containing cavity to form a spiral cooling channel for circulation of a cooling medium; the liquid outlet pipe opening is communicated with the containing cavity of the copper rod body so that the cooling medium obtained after heat exchange can be discharged. According to the copper rod for melting the quartz crucible, the spiral cooling channel is formed in the containing cavity of the copper rod body, the flowing path of a cooling medium can be effectively prolonged, the contact time of the cooling medium and the copper rod body is prolonged, and therefore the heat dissipation efficiency of the copper rod can be improved, and the influence of high temperature on the copper rod during melting of the quartz crucible is avoided.

The invention provides a czochralski method monocrystalline silicon preparation method and a matched growth system. According to the Czochralski method monocrystalline silicon preparation method, a stabilization treatment step is executed after material melting is finished, the stabilization treatment step comprises a magnetic field closing stage and a magnetic field opening stage, and the lifting movement tracks of a quartz crucible in the two stages are the same and the rotation directions are opposite. According to the technical scheme, two-stage stabilization treatment of closing and opening of the magnetic field is set after material melting, and preferably, the lifting track, the total displacement and the rotation rate of the quartz crucible in the two stages are consistent in rate and movement and are opposite in direction, so that impact and scouring on the quartz crucible are reduced, high-temperature softening deformation is relieved, and chemical reaction of molten silicon and the crucible is inhibited; and the crucible loss is delayed.

The application discloses a heat treatment device for high-concentration magnesium-doped lithium tantalate single crystal growth, and relates to the field of high-concentration magnesium-doped lithium tantalate single crystal growth. The heat treatment device comprises a base, a tank body is arranged at the bottom of the base, a quartz crucible is arranged in the tank body, a circular ring plate is arranged at the top of the quartz crucible, a sliding groove is arranged on the inner wall of the circular ring plate, a wedge-shaped block is arranged in the sliding groove, a ring-shaped block plate is arranged at the tail end of the wedge-shaped block, a second threaded ring is fixed to the top inside the circular ring plate, the second gear drives the first threaded ring to rotate, the first threaded ring drives the second threaded ring to move downwards, the second threaded ring drives the circular ring plate to move downwards, the bottom of the circular ring plate extrudes the liquid after high-temperature dissolution in the quartz crucible, and the steam pocket in the liquid is extruded out.

The utility model relates to the technical field of monocrystalline silicon manufacturing, in particular to a heating device and a single crystal furnace, and the heating device comprises a bottom heating part and a side heating part; wherein the bottom heating part is connected with the side heating part, and the bottom heating part and the side heating part define a bowl-shaped structure which is hollow inside and provided with an opening in the top in the preset direction. According to the heating device provided by the invention, the side heating part is additionally arranged, and the side heating part is closer to the pot support, so that when the heating device is not used for heating, more heat radiated by the pot support and the bottom of the pot upper can be conducted away, the temperature of the lower part of the quartz crucible is quickly reduced, and the oxygen content in monocrystalline silicon is more favorably reduced; during heating, heat can be accumulated, and the material melting time can be shortened.

The invention belongs to the technical field of semiconductor material processing equipment, and particularly relates to a thermal field for controlling the crystal bar temperature gradient in the single crystal shouldering stage and a single crystal furnace. The lifting type local heat management system comprises a temperature detection device, a lifting mechanism, an annular temperature adjusting mechanism and a control module, the annular temperature adjusting mechanism is located above the quartz crucible and on the inner side of the fixed heat field, and the temperature detection device is arranged on the single crystal furnace and used for detecting the temperature of the edge area and the center of the shoulder of a crystal bar in the quartz crucible; the lifting end of the lifting mechanism is connected with the annular temperature adjusting mechanism, the fixed end of the lifting mechanism is connected with the single crystal furnace, the lifting mechanism is used for driving the annular temperature adjusting mechanism to ascend and descend, a preset distance is formed between the annular temperature adjusting mechanism and the shoulder of the crystal bar, and the temperature detection device and the lifting mechanism are electrically connected with the control module. And temperature compensation is carried out on the low-temperature area of the shoulder of the crystal bar.

The invention relates to the technical field of sapphire crystal growth, and discloses a high-temperature measuring device for a crystal growth furnace, which comprises a base, an outer furnace body is arranged on the upper end surface of the base, a bracket is arranged at the upper end part of a connecting arm, a high-precision servo motor is arranged on the bracket, a material pulling channel is connected between the bracket and a sealing plate, and the material pulling channel is communicated with the outer furnace body. An inner furnace body is arranged in the outer furnace body, an inert gas cavity is formed in the inner furnace body, a high-frequency inductance heating frame is arranged in the middle of the bottom of the inert gas cavity, and a quartz crucible is arranged at the upper end of the high-frequency inductance heating frame. The movement attribute of the extension inner pipe is fully utilized, the cooling cavity is filled with the cooling medium, when the extension inner pipe extends into the gap between the inner furnace body and the outer furnace body, the cooling medium is liquefied to release heat, and when the extension inner pipe is located in the inner furnace body, the cooling medium is vaporized to release heat, so that heat in the movable measuring seat is absorbed, and the purpose of cooling is achieved; and circulating cooling is realized.

This application relates to a method for preparing cristobalite sand and fused silica glass sand using waste quartz crucibles, wherein the method includes the following steps: 1) crushing and first screening the waste quartz crucibles, collecting the first undersize and the first oversize respectively; 2) subjecting the first oversize obtained in step 1) to high-temperature calcination to obtain a mixture containing a surface crystallized layer of cristobalite sand and fused silica glass sand separated; 3) subjecting the mixture obtained in step 2) to auto-grinding and second screening, taking the second undersize to obtain the first cristobalite sand, and taking the second oversize to obtain the first fused silica glass sand; 4) washing the first cristobalite sand in step 3), and performing wet screening to collect the third oversize for processing to obtain the first high-purity cristobalite sand, and collecting the third undersize for processing to obtain the second high-purity cristobalite sand.

The invention discloses a quartz crucible forming device, a quartz crucible forming method and a quartz crucible. The quartz crucible forming device comprises an outer mold, an inner mold and a telescopic forming assembly, the outer mold can circumferentially rotate along the axis of the outer mold; the inner mold is coaxially fixed in the outer mold, and a gap is reserved between the outer wall of the inner mold and the inner wall of the outer mold to form a clamping cavity for accommodating quartz sand; the telescopic forming assembly is arranged in the inner mold along the axis of the inner mold and can penetrate through the outer wall of the inner mold in a reciprocating mode so as to adjust the distance between the telescopic forming assembly and the inner wall of the outer mold. Quartz sand can be compacted and attached to the inner wall of the outer mold layer by layer, manual forming operation can be replaced, a large amount of sand can be rapidly added, the forming time is prolonged, the uniformity of the inner layer and the outer layer of the quartz sand can be effectively improved when the quartz crucible is formed, the density of each sand layer is improved, and the production efficiency is improved. And the generation of influencing mixed materials during the forming of the quartz crucible is reduced, so that the product quality of the quartz crucible is greatly improved.

The invention belongs to the technical field of quartz crucibles, and particularly relates to a microbubble characterization method for a transparent layer of a quartz crucible. According to the method, a seventh sample is obtained through cutting sampling, precise linear cutting separation of a bubble layer and a transparent layer, coarse grinding thinning, accurate grinding, chemical mechanical polishing and multi-step cleaning; the seventh sample is subjected to haze testing, haze data of the transparent layer of the quartz crucible is obtained, the bubble number and grade classification of the transparent layer of the quartz crucible are obtained according to the haze data of the transparent layer of the quartz crucible and a corresponding model, and the corresponding model is a model corresponding to the haze of the transparent layer of the quartz crucible and the number of microbubbles. The method provided by the invention is high in data objectivity, simple in operation process, high in detection efficiency and low in equipment cost; meanwhile, the scattering capacity of bubbles to light can be directly quantified, the correlation with optical interference in actual use is tighter, and microscope counting only reflects the number and cannot directly correspond to the function influence.

The utility model discloses a quartz crucible forming device which comprises a base, a guide rod is fixedly connected to the upper surface of the base, a top plate is fixedly connected to the upper surface of the guide rod, an air cylinder is fixedly connected to the upper surface of the top plate, and a telescopic rod is arranged at the output end of the air cylinder. By arranging a motor, a lead screw and a sliding block, the lower mold can be driven to move outwards, so that a worker is prevented from stretching hands into equipment to perform feeding and demolding operation, potential safety hazards are reduced, and by arranging a first threaded hole, a bolt, a sliding strip and a second threaded hole, the mold plate and the upper mold can be integrally replaced; and by arranging a pressing rod, a triangular block, a sliding column, a limiting plate, a spring and a disc, the crucible can be ejected out after being formed, so that the demolding efficiency is improved, the ejection structure is in a disc shape, the contact area between the ejection structure and the crucible is large, and therefore the situation that the crucible is damaged can be reduced.

The invention provides a judgment method and application of high-purity quartz sand for preparing a low-bubble photovoltaic quartz crucible, and the judgment method comprises the following steps: detecting attribute indexes of the high-purity quartz sand, including chemical components, tap density and gas-liquid inclusion content; calculating the detected attribute index of the high-purity quartz sand according to a calculation formula to obtain a bubble content index; the impurity element content and bubble content indexes in the high-purity quartz sand are graded, and the high-purity quartz sand is comprehensively judged according to the impurity element content grade and the bubble content index grade. Reliable and quantifiable raw material screening standards are provided for the quartz crucible manufacturing industry, inferior quartz sand can be accurately screened out, the product yield of the low-bubble photovoltaic quartz crucible can be remarkably increased, the service life of the low-bubble photovoltaic quartz crucible can be remarkably prolonged through application and popularization of the low-bubble photovoltaic quartz crucible, the stability and safety of a downstream monocrystalline silicon drawing process are effectively guaranteed, and the production cost is reduced. The method is of great significance in promoting cost reduction, efficiency improvement and high-quality development of a photovoltaic industry chain.