10results 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 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.

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.

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 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.

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.