18results about How to "Uniform crystallization" patented technology

The invention discloses a gas-liquid atomization rotational flow mixing reaction device which comprises a mounting bracket, the mixing reaction chamber is detachably mounted on the mounting bracket through a bolt; the communicating chamber is detachably mounted at the top of the mixing reaction chamber through a bolt; the gas-liquid separation chamber is detachably mounted at the top of the communicating chamber through a bolt; the atomizing nozzle is fixedly connected to the mixing reaction chamber; the driving unit and the indicating unit are installed on the pressure regulating unit, and one end of the gas feeding pipe is fixedly connected to the atomizing nozzle. By adopting a gas-liquid atomization and rotational flow self-stirring structure, the problems that traditional mechanical stirring is slow in mixing, poor in uniformity and unbalanced in local proportion are fundamentally solved, the phenomena of back mixing and short circuit are eliminated, the reaction is more sufficient, crystallization is more uniform, the yield is higher, meanwhile, a stirring mechanism is omitted, the device is simplified, energy consumption is reduced, parameters such as pH and temperature are fed back more timely, and the production efficiency is improved. And the control precision is greatly improved.

The invention relates to the technical field of calcium carbonate manufacturing, in particular to a preparation method of high-whiteness light calcium carbonate. Comprising the following steps: efficiently leaching the calcium element in the carbide slag; preparing a microbial crystal form control agent; and carrying out electric dispersion treatment and precipitation on calcium ions. The microbial crystal form control agent is prepared by regulating and controlling the mixing ratio of the bacillus pumilus fermentation liquor to the pseudomonas fluorescens fermentation liquor, and it is avoided that in the full mixing process of the microbial crystal form control agent and the calcium-containing filtrate, Ca < 2 + > is mineralized to form large calcium carbonate particles; stearic acid and sodium polyacrylate in the microbial crystal form control agent can enable particles to be more stable, provide ion adsorption capacity, optimize the crystal form of calcium carbonate and form vaterite type crystals with smaller crystal form, and bacillus pumilus can assist generation of small-particle-size calcium carbonate along with time, so that high-whiteness small-particle-size light calcium carbonate is obtained.

The invention provides a core replacing type molten aluminum crystallization launder and a using method thereof, and relates to the technical field of non-ferrous metal metallurgical equipment.The core replacing type molten aluminum crystallization launder comprises a launder body and an inner core assembly, a liquid flowing groove is formed in the top of the launder body, and a containing groove is formed in the bottom of the launder body; the inner core assembly is arranged in the containing groove, the inner core assembly and the containing groove are detachably installed, the inner core assembly comprises a crystallizer inner core and a heating plate inner core, and the crystallizer inner core and the heating plate inner core are alternately connected with the containing groove; according to the core replacement type molten aluminum crystallization launder, the working mode of the launder is adjusted by replacing different inner cores, different actual requirements are met, meanwhile, the launder body is easier to maintain and upgrade, it is effectively guaranteed that all areas in the launder are dried evenly and thoroughly, and it is guaranteed that the subsequent cooling crystallization process is conducted smoothly.

The present invention provides a MOR molecular sieve membrane and a preparation method thereof, wherein the preparation method of the MOR molecular sieve membrane comprises the following steps: S1, mixing an aluminum source, an alkali solution, a silicon source, a fluoride salt, an organic alcohol and water to obtain a synthetic sol; S2, coating a seed solution on the surface of a porous carrier to obtain a seed layer; S3, coating the synthetic sol on the surface of the seed layer, and performing three temperature-variable crystallizations to obtain a MOR molecular sieve membrane; in step S1, the molar ratio of SiO2, Na2O, Al2O3, ROH, NaF and H2O is 1: (0.1-0.35): (0.03-0.15): (0.2-2): (0.1-0.5): (10-100). The present invention adds an organic alcohol to improve the crystallinity and overall structural integrity of the MOR molecular sieve membrane structure.

The invention provides a perovskite solar cell based on small molecule doping and a preparation method thereof. The cell structure sequentially comprises a substrate, an electron transport layer, a perovskite layer, an interface modification layer, a hole transport layer and a top electrode layer from bottom to top, based on small molecule doping, hippuric acid molecules are used as an additive to be doped into a perovskite precursor solution. The phase distribution problem is solved through hippuric acid doping, benzene rings can form a stable support through pi-pi interaction, and the interface structure is stabilized. O atoms in carbonyl and hydroxyl in the molecule are coordinated with Pb < 2 + >,-NH reacts with uncoordinated I <->, defects are passivated, and carrier extraction is accelerated. Hippuric acid reacts with A-site cations, FACs are induced to be crystallized at the same time, and uniform A-site phase distribution is obtained. The formation of the homogeneous phase enables the energy level difference between the upper and lower surfaces of the perovskite thin film to become smaller, which is beneficial to charge transfer, and finally the high-performance FACs perovskite solar cell device is prepared.

The application discloses a kind of preparation methods for high transparent polyethylene film additive, belong to polyethylene technical field, to solve the technical problems of high transparent polyethylene film in prior art, high production cost, aging resistance performance needs to be further provided, including nucleating agent grafting quaternary ammonium salt modified nanosilica and low-density polyethylene are mixed, initiator is added, by melt grafting reaction in twin-screw extruder, reaction is finished, extrusion, cooling, granulation, obtain intermediate I;Intermediate I, antioxidant 168, antioxidant 1076, zinc stearate, antistatic agent 1800 and mustard acid amide are mixed, to obtain high transparent polyethylene film additive;The high transparent polyethylene film additive prepared in the application is mixed with low-density polyethylene, and the processing performance is good, to obtain the high transparent polyethylene film with lower cost;This film not only has good transparency and tensile property, but also has good aging resistance.

The invention provides a method for preparing a large-volume artificial stone block by directly utilizing slag, and relates to the technical field of comprehensive utilization of metallurgical resources, and the method comprises the following steps: cooling first slag or modified slag in a high-temperature molten state for first crystallization to obtain molten slurry containing a first crystal phase; casting the molten slurry into a large-volume mold, feeding the large-volume mold into a kiln, carrying out crystallization and heat preservation at 870-1050 DEG C after solidification, and carrying out secondary crystallization; and then the temperature of the kiln is reduced to 750 DEG C at the speed of 0.1-0.17 DEG C / min, external source heating is stopped, slow annealing and cooling slow annealing are achieved only according to internal heat of the green body in the mold, and the large-size artificial stone quarry block is obtained. And the artificial stone quarry block is further subjected to stone cutting and other procedures to form stone products of different models. According to the method, low-energy-consumption production of the artificial stone quarry stone is achieved with the slag as the raw material, the produced stone is good in performance, and the preparation process is simple.

This invention discloses a vacuum crystallization purification process for menthyl benzoate, comprising the following steps: S100, feeding; S200, cooling; S300, centrifugation. The parameter control process in step S200, cooling, specifically includes the crystallization temperature range, vacuum degree, methanol reflux flow rate, reflux methanol temperature, condenser medium, temperature rebound time, two-stage slow cooling method, multi-stage cooling method, and purity control of the menthyl benzoate raw material. This invention utilizes a rapid cooling method involving vacuum absorption and methanol reflux. Through precise temperature control, the system enters a transient stable state of crystallization before crystallization, where supersaturation and dissolution saturation are in equilibrium. Through two-stage slow cooling and multi-stage cooling stages, the system gradually enters a supersaturated solution state. Due to the precise control of the saturation-supersaturation-crystallization state, impurities cannot crystallize, thus achieving deep purification and obtaining a high-purity crystalline product.

The application relates to the field of solar cells, and provides a preparation method and device of a solar cell film and electronic equipment. The preparation method comprises the following steps: obtaining a wet film base material, the wet film base material being prepared by using a roll-to-roll printing process; and after vacuum-assisted crystallization of the wet film base material by using a multistage vacuum gradient, a solar cell film is obtained. The application solves the defect of non-equilibrium state nucleation crystallization instability in the preparation of a solar cell in the related art. The preparation method of the solar cell film provided by the scheme effectively improves the quality of the prepared solar cell film by introducing a vacuum-assisted crystallization technology.

This utility model discloses an energy-saving low-temperature desalination and dehydration device, relating to the technical field of desalination and dehydration equipment. It includes a vacuum evaporator and a feed inlet: the feed inlet is located above the vacuum evaporator. After the concentrated water discharged from the membrane separation component of this energy-saving low-temperature desalination and dehydration device enters the crystallization reactor, a second motor drives the drive shaft to rotate, causing the wall-scraping agitator to operate continuously within the crystallization reactor. This agitation promotes uniform crystallization of salts in the solution, preventing disordered crystal growth due to localized supersaturation, thus improving crystallization efficiency and purity. Furthermore, the outer end of the wall-scraping agitator moves closely against the inner wall of the crystallization reactor, effectively preventing crystals from adhering to the reactor wall and forming scale, thus avoiding impact on the reactor's heat transfer efficiency and subsequent cleaning difficulty. This ensures uniform solid-liquid distribution of the mixed liquid entering the centrifugal separator, providing favorable conditions for subsequent solid-liquid separation, thereby guaranteeing the efficient and stable operation of the entire desalination and dehydration process.

The present application relates to the technical field of cooling crystallization, and discloses a cooling crystallization device for preparing copper chloride by dry method and its use method, mainly including a cooling mechanism, the cooling mechanism including a cooling shell, a cooling pipe, an inlet pipe and an outlet pipe, the bottom end of the cooling pipe is fixedly connected to the bottom center of the cooling shell, and the cooling cavity of the cooling pipe is connected to the cooling interlayer of the cooling shell. When the present invention is working, the refrigerant is discharged into the inlet pipe, and then the inlet pipe passes the refrigerant into the cooling cavity of the cooling pipe from bottom to top, and then the cooling pipe passes the refrigerant into the cooling interlayer of the cooling shell from top to bottom, and finally discharged through the outlet pipe, thereby the cooling mechanism effectively increases the heat exchange area in the cooling mechanism by allowing the refrigerant to flow through the center and inner wall of the cooling shell, improves the uniformity of heat dissipation in the cooling mechanism, and makes the temperature uniform everywhere in the cooling mechanism, thereby improving the crystallization sufficiency and enhancing the cooling crystallization effect of the cooling mechanism.

This invention discloses a method for preparing a carbon-carbon energy-saving electrode for a single-crystal furnace, belonging to the technical field of composite material preparation. The method includes the following steps: preparing an electrode preform using a layup needle-punching method; spraying resin onto the electrode preform using a high-pressure atomization spraying method, impregnating it with resin and then curing it; depositing carbon on the electrode preform using a heating element-type vapor deposition method to densify it and form a carbon-carbon composite material; placing the carbon-carbon composite material in an iron box, filling the inside of the iron box with asphalt, placing asphalt and resin 0.5-1m above the carbon / carbon composite material, evacuating and sealing the box, placing it in an impregnation tank for high-pressure impregnation, and then placing it in a carbonization furnace; then performing high-temperature heat treatment on the carbon / carbon composite material, and finally machining to obtain the carbon-carbon energy-saving electrode. The prepared carbon-carbon electrode has low resistivity and thermal conductivity, which helps reduce furnace heating costs, thus possessing advantages such as energy saving, high temperature resistance, and high strength.

This invention relates to the field of lithium-ion battery cathode material technology, specifically a high-performance lithium-rich manganese-based cathode material based on pretreated boron nitride, its preparation method, and its application. The preparation method includes: introducing hydroxyl and amino groups onto the surface of boron nitride nanosheets; preparing a composite precursor powder by mixing a nickel-cobalt-manganese hydroxide precursor, a lithium source, TiO2, a phosphorus source, and pretreated boron nitride; sequentially performing conventional pre-calcination, a first-segment Joule heat treatment, and a second-segment Joule heat treatment; performing a third-segment instantaneous Joule heat treatment, followed by quenching; by introducing a surface-functionalized high thermal conductivity boron nitride network into the bulk phase of the material, and combining a programmed sequential heat treatment of "pre-calcination-two-segment Joule heat treatment" with instantaneous surface melting and quenching, this method effectively solves the inherent thermal gradient problem of the Joule heating method, simultaneously achieving high bulk phase homogenization and surface stabilization, resulting in a product with excellent comprehensive electrochemical performance.

The invention discloses a preparation method of a polycrystalline silicon thin film and a transistor, and the preparation method of the polycrystalline silicon thin film comprises the steps: providing a semiconductor substrate, and forming an amorphous silicon thin film on the semiconductor substrate; forming a heat conduction layer covering the amorphous silicon film; forming a light absorption layer covering the heat conduction layer; and performing laser annealing treatment to convert the amorphous silicon thin film into the polycrystalline silicon thin film. According to the preparation method of the polycrystalline silicon thin film, during laser annealing, laser energy can be converted into heat through the light absorption layer, then the heat is dispersed through the heat conduction layer and uniformly transmitted to the amorphous silicon thin film, so that the amorphous silicon thin film is converted into the polycrystalline silicon thin film, and polycrystalline silicon is uniformly crystallized.

The application discloses a wear-resistant and high-temperature-resistant polyester fiber and a preparation method thereof, and belongs to the technical field of polyester processing, and is used for solving the technical problem that the wear resistance and high-temperature resistance of the polyester fiber in the prior art need to be further improved, and specifically comprises the following steps: adding modified PET, modified filler and auxiliary additive into a double-screw extruder, melt-extruding, spinning, and obtaining a polyester fiber precursor; the application is characterized in that an epoxy group is modified on a carboxylated carbon nanotube through a free radical polymerization reaction to obtain a modified filler, and the modified filler, the auxiliary additive and the modified PET are melt-spun together to obtain the polyester fiber precursor, a modified antibacterial agent is prepared through a coprecipitation method, an antibacterial liquid is further prepared, and the polyester fiber precursor is immersed in the antibacterial liquid to obtain the polyester fiber, so that the wear resistance and high-temperature resistance of the polyester fiber are improved, and the antibacterial performance of the polyester fiber is also improved.

The invention provides a perovskite solar cell, and relates to the technical field of solar cells. The transparent conducting layer is arranged on the glass substrate in the first direction; the hole transport material layer is arranged on the side, away from the glass substrate, of the transparent conducting layer in the first direction, the molecular structure of the hole transport material layer comprises a triarylamine core, each aryl group is 3, 4, 5-trimethoxyphenyl, and nitrogen atoms are substituted by-(CH2) 4-PO (OH) 2 groups; the perovskite layer is arranged on the side, away from the glass substrate, of the hole transport material layer in the first direction; the electron transport layer is arranged on one side, far away from the glass substrate, of the perovskite layer along the first direction; the buffer layer is arranged on the side, away from the glass substrate, of the electron transfer layer in the first direction; the metal electrode is arranged on the side, away from the glass substrate, of the buffer layer in the first direction; the antireflection layer is arranged on the side, away from the glass substrate, of the metal electrode in the first direction. The invention also provides a preparation method of the perovskite solar cell.

The present invention provides a graphene / polydimethylsiloxane composite aerogel and a preparation method and application thereof, and relates to the technical field of graphene aerogel. The present invention uses the Pickering emulsion method to compound water-soluble GO nanosheets with oil phase PDMS to prepare a stable water-in-oil emulsion; by non-directional freezing, ice particles in the emulsion are uniformly crystallized in all directions to obtain an isotropic porous structure; then, water and excess oil phase are removed by freeze drying, and GO is reduced to obtain a good GA structure. The present invention adopts the above-mentioned in-situ combined preparation strategy to obtain an aerogel material with a "soft-hard" phase microcomposite of hydrophobic PDMS and hydrophilic GO, fully realizing the good synergistic effect between the flexibility of PDMS and the strength of graphene nanosheets, and the obtained graphene / polydimethylsiloxane composite aerogel has an isotropic structure, and has strong compressive strength, fatigue resistance, superelasticity, good processability and flexibility.

This application discloses a laser annealing method and a semiconductor device. The laser annealing method includes: providing a substrate; scanning at least one row on the substrate with a laser beam, wherein scanning one row on the substrate with a laser beam includes a periodic operation, the periodic operation including the laser beam irradiating the substrate relatively stationary, the laser beam stopping irradiation, and the laser beam source moving relative to the substrate along the row direction; wherein the irradiation area of ​​the laser beam on the substrate is rectangular, the width of the rectangle is smaller than the width of the substrate in the row direction, and the energy density distribution of the laser beam is an isosceles trapezoid, the irradiation area of ​​the laser beam on the substrate includes a first slope region, a uniform region, and a second slope region corresponding to the isosceles trapezoid. The laser annealing method of this application, by adjusting the overlap range of the irradiation area of ​​the laser beam, enables the laser heat to be uniformly transferred to the semiconductor device during laser annealing, resulting in uniform amorphous silicon crystallization on the semiconductor device.