638results about How to "Accelerate solidification" patented technology

A method and system for processing a silicon thin film sample on a substrate. The substrate has a surface portion that does not seed crystal growth in the silicon thin film. The film sample has a first edge and a second edge. An irradiation beam generator is controlled to emit successive irradiation beam pulses at a predetermined repetition rate. Each of the irradiation beam pulses is masked to define a first plurality of beamlets and a second plurality of beamlets, the first and second plurality of beamlets of each of the irradiation pulses being provided for impinging the film sample and having an intensity which is sufficient to melt irradiated portions of the film sample throughout their entire thickness. The film sample is continuously scanned, at a constant predetermined speed, so that a successive impingement of the first and second beamlets of the irradiation beam pulses occurs in a scanning direction on the film sample between the first edge and the second edge. During the continuous scanning of the film sample, a plurality of first areas of the film sample are successively irradiated using the first beamlets of the irradiation beam pulses so that the first areas are melted throughout their thickness and leaving unirradiated regions between respective adjacent ones of the first areas. Also during the continuous scanning, each one of the first areas irradiated using the first beamlets of each of the irradiation beam pulses is allowed to re-solidify and crystalize. During resolidification and crystallization of the first areas, a plurality of second areas of the film sample are successively irradiated using the second beamlets of the irradiation beam pulses so that the second areas are melted throughout their thickness. Each of the second areas partially overlaps a respective pair of the re-solidified and crystalized first areas and the respective unirradiated region therebetween.

The invention belongs to the technical field of electrostatic spinning and relates to a portable handheld electrostatic spinning device. The top of a pushing rod of a medical syringe is provided with a pressure welding switch, a metal foil is arranged on the top side fixedly, a spinning solution is arranged in a front end inner cavity of the medical syringe, a square battery and a high-voltage direct-current inverter are arranged fixedly on the side wall of the syringe in a butt joint mode, and a stainless steel needle head which is used for spinning is arranged at the bottom end of the syringe in an inserting mode. A conventional medical syringe needle head structure and the syringe are combined and matched, the spinning solution is stored in the inner cavity of the medical syringe which is provided with the stainless steel needle head, the square battery provides a power supply for the high-voltage direct-current inverter, when the direct current voltage is inverted, the voltage in the unit of kilovolt, the positive pole of the high-voltage direct-current inverter is communicated electrically with the stainless steel needle head, and the negative pole of the high-voltage direct-current inverter is communicated electrically with the metal foils. The device is simple in overall structure, is convenient to carry, use and operate, applicable to occasions such as outdoor teaching and wounded rescue and high in economical value.

The invention discloses a low segregation centrifugal casting high speed steel roll and the method. The roll is constituted by high speed steel roll body and alloy ductile ion roll core. The roll is produced by electric furnace. The high speed steel roll body is cast on horizontal centrifuge. As the liquid steel is cast iron powder suspension concentrate with 4%-6% by weight of liquid steel is added. After the liquid steel is cast glass waste sludge is added and then it is cooled by spraying water to form the model. Meanwhile the rotate speed of casting model is changed continuously and finally the ductile ion roll core is cast at the top statically. There is no obvious element segregation in radial section of high speed steel roll manufactured in invention. The macro hardness of roll is high and can achieve 63-65HRC. The difference of roll face hardness is less than 2HRC. The hardness fall of roll along the radial direction is small. The tensile strength of roll body is more than 600MPa and the elongation of roll core is more than 3%. The service life is improved by 5-8 times than high chromium cast iron roll and is improved by 35%-48% than common high speed steel roll. It can decrease the producing cost of rolling steel and prolong roll changing period.

The invention discloses a process and equipment for preparing a nanoparticle-reinforced metal matrix composite material. The process comprises the following steps of: mixing reinforcing nanoparticles with matrix metals and a grain growth inhibitor in a stirring ball mill together, and then loading the mixture into a steel pipe; casting the mixture together with the matrix metals in a water cooling crystallizer or casting and forming the mixture together with a molten metal in a casting mould; and performing quick solidification and crystallization after electromagnetic stirring and ultrasonic vibration to ensure that the two phase materials achieve complete metallurgical bonding, wherein because of the electromagnetic stirring and the ultrasonic vibration, the two phase materials are mixed more uniformly, and all properties of the composite material can be further improved. by using the process and the equipment, a production process is simple, the cost is low, the efficiency is high, the product performance is high, the process is easy to control, the external dimensions of products are not limited by the process, and large-sized nanoparticle-reinforced metal matrix composite materials can be manufactured.

Methods and apparatuses are provided for casting silicon for photovoltaic cells and other applications. With these methods, an ingot can be grown that is low in carbon and whose crystal growth is controlled to increase the cross-sectional area of seeded material during casting.

The invention discloses a platen machine which comprises a gantry frame and a compacting mould. The compacting mould is composed of multiply heating platens (2a), and an elastic connecting element (2b) is arranged between two adjacent heating platens. Each heating platen (2a) is hollow inside. A heat-exchanger tube (2a1) is arranged inside the platen machine, and the heat-exchanger tube (2a1) is connected with a heat transfer oil circulating system. Guide pillars (1a1, 1ab) used for guiding the multiply heating platens (2a) are arranged on the gantry frame. The platen machine also comprises a buffer device (3) which is fixedly connected on the bottom portion of the beam (1c) of the gantry frame, and is connected with the top layer heating platen of the multiply heating platens of the mould. The compacting mould is driven by a hydraulic cylinder (6) on the bottom portion of the compacting mould. A piston rod (6a) of the hydraulic cylinder is connected with the bottom layer heating platen. The platen machine can be used for compacting multiply wood plates each time, and compacting efficiency is high. Due to the fact heat transfer oil is adopted to transfer heat to the wood plates, the wood plates are heated up quickly, heat is distributed evenly, glue cement among the wood plates is enabled to solidify rapidly, compacting quality is high, and compacting speed is fast.

The invention relates to a preparation method and an application of a bioactive factor loaded temperature-sensitive composite gel carrier. The method comprises the following steps: 1. preparing a sodium alginate hydrosol; 2. preparing a sodium alginate-chitosan hydrosol through the hydrosol prepared by the step 1; 3. preparing a sodium glycerophosphate solution, adding the sodium alginate-chitosan hydrosol under a stirring condition to obtain a uniform sol; 4. adding adiponectin to the uniform sol prepared by the step 3, adding Ca<2+> and uniformly stirring; and 5. adding calcined bone powder to the sol prepared by the step 4 and uniformly mixing to obtain the bioactive factor loaded temperature-sensitive composite gel carrier. The preparation method, for shortcomings of the prior art of repairing missing and defects of an extraction socket wall, can greatly improve bioactivity, biocompatibility, mechanical tolerance and a slow release performance of a normal gel carrier, thus providing a novel repairing material for treatment of repairing missing and defects of the extraction socket wall.

The invention relates to a high-impurity molten silicon high-pressure gas-blow separation device and a high-impurity molten silicon high-pressure gas-blow separation method. According to the invention, a graphite pedestal is arranged in a furnace body on a lower part. A crucible accommodating polysilicon is arranged on the graphite pedestal. a heating body connected with a system control device is arranged on the periphery in the furnace body. Gas-blow pipes connected with an gas-supply device are arranged above the furnace body. Gas outlet ends of the gas-blow pipes are oriented towards the bottom surface inside the crucible, and are distributed between the crucible center and the crucible inner side surfaces. A polysilicon material is added into the crucible; the chamber of the furnace body is closed; high vacuum is pumped, wherein a vacuum degree is lower than 0.1Pa; heating is carried out such that polysilicon is molten; crystal growth is allowed; through the gas-supply device, hot and cold protective gases are sequentially blew to the top of silicon liquid by using the gas-blow pipes, such that molten silicon is focused to the center and edge of the crucible, and protrusions are formed; solidification is carried out; the material is cooled to a required fetching temperature, and is fetched from the furnace; and the high-density impurity part is removed. With the device and the method, yield can be improved, and cost can be reduced.

Provided herein is a method for refining primary silicon present in a hypereutectic aluminum silicon alloy. The method contemplates the controlled application of pressure to refine the primary silicon during the casting of articles. The application of pressure decreases the primary silicon particle size to improve the machinability and wear resistance of the final cast articles.

The present invention relates to a kind of inorganic regenerated concrete mixture and its preparation process. The inorganic regenerated concrete mixture is prepared with waste concrete regenerated aggregate and industrial waste slag as main material and through adding activating agent and water and through stirring. The mixture has the features of high strength, good hydraulicity and powerful deformation resistance. It is one ideal road base material and may be used widely in the road construction in soft soil foundation area.

The invention discloses a bimetal metallurgical composite pipe and a manufacturing method thereof. The manufacturing method comprises the following steps of manufacturing a pipe blank of the bimetal metallurgical composite pipe by adopting a vacuum water-cooling die casting technology, specifically inner metal and outer metal are metallurgically combined in a high-temperature diffusion mode, and the two ends of the pipe blank are covered by the inner metal; carrying out hot rolling forming on the obtained pipe blank of the bimetallic metallurgical composite pipe so as to enable the pipe diameter and the wall thickness of the bimetallic metallurgical composite pipe to meet the preset standard and make the inner metal meet the preset thickness requirement; and carrying out quenching and tempering treatment on the whole hot-rolled bimetallic metallurgical composite pipe to make the outer metal meet the preset strength requirement, and completing the manufacturing of the bimetallic metallurgical composite pipe. According to the method, the high strength of an oil pipe column is ensured, and meanwhile, the integrity of corrosion resistance of the inner wall is achieved.

The present invention relates to bamboo manufacturing field, in particular, to a process for making a bamboo filament slab floor by opposite directional hot pressing. Aiming to overcome the defects that, while compressing, the existing bamboo filament slab floor at normal temperature under cold pressing is easy to rebound and expand, has low strength and weak resistance to abrasion and is easy to mildew while using for a long time, the present invention adopts shredding bamboo sheet, sizing treatment, moulding bamboo filament and etc. procedures, characterized in that, a secondary drying procedure should be inserted between said sizing treatment and bamboo filament moulding procedure; said sizing treatment should be implemented by soak sizing bamboo filament; said compressing includes opposite directional hot pressing of positive pressing and side pressing. The present invention adopts specific manufacturing technology, thus the floor can avoid the occurrence of holes and gaps inside bamboo filament slab floor and discharge formaldehyde and has stable quality, and will be not prone to mildew and deform while using for a long time. It can be widely used and suitable for indoor and outdoor flooring and various boards used in decoration and furniture.

The invention belongs to the field of medical equipment, particularly relates to the field of medical biopolymer materials and provides sustained antibacterial hemostatic powder and a preparation method of the sustained antibacterial hemostatic powder. The sustained antibacterial hemostatic powder is prepared from nanometer silver, sodium carboxymethyl cellulose and alginate, and by weight, 1-3 parts of the nanometer silver, 10-20 parts of the sodium carboxymethyl cellulose and 5-10 parts of the alginate are included. According to the sustained antibacterial hemostatic powder, the nanometer silver, the sodium carboxymethyl cellulose and the alginate are used as the raw materials, and the sustained antibacterial hemostatic powder is obtained through a spray drying method; and the hemostatic powder not only has the hemostatic function, but also has the excellent antibacterial function, as degradation of the sodium carboxymethyl cellulose and the alginate after the hemostatic powder is in contact with the blood or diffusate, the contained nanometer silver is released slowly, and thus the sustained antibacterial purpose is achieved.

A making device and method of subtilis solder alloy solderball, which relates to a making device and method of the alloy solderball for electronic packaging industry, in order to settle the problems that the making device of existing solderball is large with complicated structure and high making cost and the making process of the solderball is miscellaneous with low efficiency and low precision of the made solderball. The gas output ends of gas supply device of the invention respectively connect to the input end of the pressure controller and the top end of the gas protection installation, a lifting work platform is provided on the lower part of the gas protection installation and can move vertically, a cooling solidification device is mounted on the lifting work platform in the gas protection installation; the method of the invention is that: adding the solder with solid state to the liquid droplet maker; filling argon gas or nitrogen in the gas protection installation; melting the solder; dispersing the melt drip; forming the solderball; completing the steps of collecting, cleaning, drying, packaging. The device of the invention has advantages of simple structure and low cost, the method of the invention has characteristic of good process flexibility.

The invention provides a lyocell fiber spinning solution waste recycling device and a recycling method thereof. The recycling device comprises a waste pipeline, a cooling device, a breaking device and a leaching device, wherein the waste pipeline is provided with a spinning solution waste inlet and a spinning solution waste outlet; the spinning solution waste inlet is connected to a spinning solution waste output device; the cooling device is provided with a cooling material inlet and a cooling material outlet; the cooling material inlet is communicated with the spinning solution waste outlet; the breaking device is provided with a breaking material inlet and a breaking material outlet; the breaking material inlet is communicated with the cooling material outlet; the leaching device is provided with a leaching material inlet, an NMMO leaching solvent inlet, a leaching liquid outlet and a leaching slag outlet; the leaching material inlet is communicated with the breaking material outlet; a plurality of extrusion holes are formed in the spinning solution waste outlet of the waste pipeline. By virtue of the application of the recycling device, the NMMO solvent in the lyocell fiber spinning solution waste is effectively recycled, so that the manufacturing cost is reduced.

The invention relates to a pollen pini tooth cleaning agent and a preparation method thereof, and specifically relates to a mouthwash using pollen pini as a main raw material and a preparation method thereof. Main raw materials comprise 30-55 parts of pollen pini, 12-35 parts of chitosan, 10-20 parts of sodium aluminum carbonate, 5-10 parts of zinc chloride and 10-25 parts of pennyroyal. The cleaning agent provided by the invention can be used as a mouthwash for everyday tooth brushing and gargling before and after meals; the cleaning agent can clean teeth and oral cavity, prevent carious tooth, treat gingival bleeding and periodontitis, is convenient for usage and has a lasting effect.

The invention relates to an automatic welding machine. The automatic welding machine comprises a working platform, one or more welding mechanisms arranged on the working platform and a control system for controlling the welding mechanisms. The automatic welding machine is characterized in that the welding mechanism comprises a central electrode and a plurality of moving electrodes arranged at the periphery of the central electrode, wherein each moving electrode comprises a sliding rail, a moving electrode block and a moving electrode cylinder; the moving electrode block can be arranged on the sliding rail in a sliding manner; the moving electrode cylinder is used for driving the electrode block to slide upwards; the central electrode and the moving electrodes are respectively connected with two electrodes of a power supply; and the moving electrode cylinder is connected with the control system. The automatic welding machine has the advantages that a plurality of workpieces or a plurality of welding parts of the same workpiece can be welded automatically and simultaneously, the automation degree is high, the use is convenient and the welding efficiency is high.

The invention discloses an antimicrobial disinfectant with good biocompatibility. The antimicrobial disinfectant includes: 0.001wt%-100wt% of an antimicrobial macromolecule; 0wt%-99.999wt% of an assistant; and 0wt%-99.999wt% of a solvent. The antimicrobial disinfectant provided by the invention has the characteristics of simple components and easy preparation; long-acting and rapid killing and inhibiting effect on gram positive pathogenic bacteria, gram negative pathogenic bacteria, moulds, fungi, viruses and other microorganisms selectively; no toxic or side effect on normal animal body cells and tissues; no irritation on the human body; auxiliary hemostasis and coagulation, and promotion of cell tissue regeneration, acceleration of wound healing, and no drug resistance; and no pollution to the environment, thus being a widely applicable, economical, environment-friendly and safe antimicrobial disinfectant.

The present invention discloses a mint coconut fragrant low-salt duck egg prepared from the following parts by weight of raw materials: 70-80 parts of fresh duck eggs, 10-12 parts of mint leaves, 6-8 parts of strawberries, 8-10 parts of green olives, 4-5 parts of broadleaf holly leaf, 2-3 parts of radix isatidis, 4-5 parts of achene of great burdock, 1-2 parts of calyx seu fructus physalis, 3-4 parts of gotu kola, 2-3 parts of Indian Kalimeris herb, 4-5 parts of loquat flower, 20-30 parts of high-degree Chinese liquor, 40-50 parts of coconut milk, and proper amount of yellow sand, white vinegar and table salt; the duck eggs are soaked with the white vinegar for formation of small holes on eggshell to facilitate the exchange of substances such as salt and the like, then duck eggs are first pickled with a pickle liquid and then pickled with a pickle wine with same salt content with that of the pickle liquid, the osmotic pressure of egg white and the osmotic pressure outside the shell are consistent, so that salt permeates into egg yolk for dehydration of the egg yolk, salt content of the egg white may not rise, the first phase is quickly completed by vacuum pickling, by addition of the Chinese liquor, the coagulation of protein is accelerated, the egg yolk releases oil quickly, the egg white of cooked salted duck eggs tastes appropriate, the egg yolk is loose, oily and smooth, and the mint coconut fragrant low-salt duck egg is overflowed in liquor aroma, rich in coconut flavor, and rich in mint flavor.