34results about How to "Improve the crystallization effect" patented technology

The present invention discloses one kind of ultralow thermal expansion devitrified glass used for reflector, planar mirror, template and other precise optical elements. It has the material composition of: SiO2 47.2-49.1(in wt%, the same as below),Al2O3 27.6-29.0,Sb2O3 0.78-0.82,As2O3 0.30-0.35,BaO 2.98-3.05,ZnO 2.00-2.05, CaO 2.28-2.33,MgO 0.5-1.0,Li2O 7.1-7.5,P2O5 4.0-4.4,ZrO2 1.2-1.7 and TiO2 1.4-1.5 . The technological process includes the following steps: mixing the components, high temperature smelting in high temperature quartz-ceramic crucible at 1580-1630 deg.c, tapping at 1450 deg.c, forming, inspection, nucleating at 660-690 deg.c, crystallizing at 690-720 deg.c, precise annealing at 640-540 deg.c.

The invention relates to a glass ceramic crystallization technology. In heating, crystallization and cooling processes, microwave heating systems and electric auxiliary heating systems carry out crystallization treatment on a glass ceramic product, temperatures of sections of a furnace are controlled through adjusting output power of the microwave heating system, and the balance of the product temperature and the temperature of a corresponding section of the furnace is realized through adjusting output power of the electric auxiliary heating system so that cracking of the glass ceramic product in crystallization is avoided. The main furnace body of a microwave heating glass ceramic crystallization device is orderly provided with a heating section, a crystallization section, a temperature reduction section and a cooling section from front to back. The sections are seal-connected. The tops of the heating section, the crystallization section and the temperature reduction section of the main furnace body are provided with microwave emission systems. The bottoms of the heating section, the crystallization section and the temperature reduction section are provided with the electric auxiliary heating systems. Temperature detection sensors are arranged in the sections of the main furnace body. An output signal is connected to a control system. The control system respectively controls and is connected to the microwave emission systems, the electric auxiliary heating systems and auxiliary systems.

The invention discloses a preparation method of refined sulfonamide, which is characterized in that it comprises the following steps: (1) chlorosulfonation reaction; (2) deicing; (3) rejection filtration on a centrifuge; (4) amination reaction; (5) refining decolorization. The preparation method of a kind of fine sulfonamide of the present invention, adds cuprous chloride catalyst in chlorosulfonation reaction, and optimizes existing process step, effectively reduces raw material feeding ratio, reduces the generation of by-product and post-treatment, and through improving amine Compound dissolution decolorization and crystallization purification process greatly improves the purity of the produced product, and its main component content can reach more than 99.5%.

The invention discloses an ultrahigh-purity aluminum crystallization method. The ultrahigh-purity aluminum crystallization method comprises the following steps of: selecting a high-purity aluminum raw material and melting the high-purity aluminum raw material into aluminum liquid in a graphite crucible; inserting a crystallization device into the graphite crucible; driving a graphite pipe sleeve to rotate synchronously by a rotary device; continuously introducing cooling gas into a gas cooling system in the graphite pipe sleeve to start crystallization; keeping a constant rotary speed of a crystallization machine in a crystallization process; adjusting the flowing direction of the cooling gas in a cooling gas path so that the surface of the graphite pipe sleeve, which is in contact with the aluminum liquid, is directionally solidified and an inverted mushroom type high-purity crystal substance with a certain thickness is separated out; when crystallization set time is reached, stopping the crystallization device from rotating and then stopping introducing the cooling gas into a rotary body; lifting the crystallization device out from the graphite crucible and picking off the crystal substance on the graphite pipe sleeve below the crystallization machine to obtain the high-purity crystal substance; and pouring out the residual aluminum liquid in the crucible and putting the high-purity crystal substance into the crucible again to be repeatedly crystallized to obtain the crystal substance with higher purity. By adopting the method disclosed by the invention, the problems in the prior art that the purification cost is high and the purification effect is not good are solved.

The invention relates to a method for preparing a sulfur coated selenium hollow nanotube. The method comprises the following steps: dissolving selenium powder and sodium sulfite into water, controlling the temperature, stirring so as to obtain a uniform seleno-sodium sulfite solution, putting into a solution with a nonionic surfactant, carrying out ultrasonic treatment, aging, carrying out centrifugal washing so as to obtain selenium nanotubes of a hexagonal system, dissolving the selenium nanotubes into diluted hydrochloric acid, carrying out ultrasonic treatment, dissolving sublimed sulfur into ethidene diamine so as to obtain a sulfuric amino solution, slowly dropping the sulfuric amino solution into the solution, violently stirring under a sealed condition, filtering, washing with water and ethanol, and drying in a drying tank, thereby obtaining a product. Compared with the prior art, the method is capable of preparing the sulfur coated selenium hollow nanotube which has a diameterof about 500 nanometers and a length of about 5-10 micrometers, is good in crystallization and repeatability, can be applied to energy storage such as lithium-sulfur batteries, and is an excellent energy storage material.

The invention discloses an electronic-grade ultra-high-purity aluminum crystallization device. The electronic-grade ultra-high-purity aluminum crystallization device comprises a rotating body and a driving device; the rotating body is installed above a crucible; the lower end of the rotating body extends into the position below the liquid level of molten aluminum in the crucible; the driving device is connected with the rotating body and is used for driving the rotating body to rotate; a cooling gas circuit is arranged in the rotating body and is filled with cooling gas to cool the rotating body, and then high-purity aluminum crystals are formed at the lower end of the rotating body through solidification and accumulation. The electronic-grade ultra-high-purity aluminum crystallization device solves the problems of high purification cost and poor purification effect in the prior art.

The invention provides a multiplex quantum dot, a preparing method thereof and a flexible display device. A two-step method is adopted to prepare the multiplex quantum dot through the mode of adding zinc sources, which is beneficial to avoiding the generation of a by-product of zinc caused when the zinc sources are added with an excessive quantity at one time, avoiding independent nucleations of excessive zinc, achieving control over the size of the multiplex quantum dot, and improving the evenness of particle diameters; the multiplex quantum dot is good in crystalizing effect and good in stability. The prepared multiplex quantum dot has the advantages of being half-peak in width, symmetric in luminescent spectrum, long in fluorescence lifetime, and high in quantum dot yield, and is beneficial to prolonging the service life of the display device when applied to the flexible display device. A result of the embodiment shows that the prepared the multiplex quantum dot is long in fluorescence lifetime, half-peak in width and symmetric in luminescent spectrum, and the fluorescence yield reaches 80% or above.

The invention discloses a preparation method of high-purity sulfanilamide. The preparation method specifically comprises the following steps that (1) a chlorosulfonation reaction is conducted, specifically, m-chloroaniline, chlorosulfonic acid and phosphorus trichloride are mixed at the molar ratio of 1:(2.8-3.6):(1-1.8), chlorosulfonic acid is added dropwise within 1.5-2 hours in m-chloroanilinewith the temperature being 35-55 DEG C, after dripping is ended, the mixed liquid is maintained for 10-30 minutes, and first mixed liquid is obtained; phosphorus trichloride is added dropwise into thefirst mixed liquid; and heating is conducted to make the temperature of the mixed product rise to 100-115 DEG C, and heat preservation is conducted for 1.5-3.5 hours at the temperature of 100-115 DEGC; (2) standing is conducted; (3) a chlorosulfonated substance is obtained; (4) an ammoniation reaction is conducted; and (5) refining is conducted, specifically, the obtained amide is subjected to dissolution decoloration and crystallization and purification. By controlling the adding sequence, frequency and amount requirements of the reactants, the reaction can be conducted more sufficiently and safer, the generated by-products are less, obtaining of high-purity sulfanilamide can be ensured, and the main component (4-amino-chloro-1,3-benzendisulfonamide) of high-purity sulfanilamide can beas high as 99.9% or above.

The invention discloses a crystallizer for a lithium hydroxide purification product. The crystallizer comprises a shell provided with a support frame, wherein a crystallization plate is arranged in the shell; the section of the crystallization plate is in a downward cone shape; a leakage port is formed in the center of the crystallization plate; a cavity is formed in the inner wall of the shell; asecond cavity communicating with a first cavity is formed in the crystallization plate; the first cavity and the second cavity are both filled with water; a heating mechanism for heating the water inthe first cavity and the second cavity is arranged on the shell; a rotating rod is arranged in the shell in a rotating manner; a plurality of stirring rods are fixedly connected to the periphery of the rotating rod; a driving mechanism for driving the rotating rod to rotate is arranged on the shell; and a cleaning and scraping structure is arranged in the shell. The crystallizer of the inventionis reasonable in structure; crystal substances can be conveniently guided out after crystallization, and the phenomena of adhesion and blockage are avoided; and heating effect is stable, so a temperature is constant, and crystallization effect is guaranteed.

The invention discloses a nano micropore corundum film and a preparation method thereof. The nano micropore aperture of the corundum film is 30 to 200 nanometers, the thickness of the corundum film is 5 to 100 microns, and the corundum film contains aluminum oxide serving as a main component. The nano micropore corundum film is prepared by the steps of preparing a porous anodic aluminum oxide template and thermally treating the porous anodic aluminum oxide template at a high temperature. The nano micropore corundum film is a film with a nano structure, can be widely applied in the fields of nano material extraction, preparation, synthesis and biotechnology, has single component, regular shape and stable performance, and is easy to prepare.

The invention relates to the technical field of semiconductor packaging, in particular to a crystal taking device of a direct drive motor. The device comprises a power device used for blowing and absorbing air, a motor, a swinging arm arranged on a rotation shaft of the motor, an air mouth arranged in the swinging arm, and an air pipe used for communicating the power device and the air mouth. The air pipe is divided into a first air pipe and a second air pipe. A channel (2) for air circulation is arranged in a rotor (1) of the motor. One end of the first air pipe communicates with the power device and the other end of the first air pipe communicates with one end of the channel (2) in the rotor of the motor. One end of the second air pipe communicates with the other end of the channel (2) in the rotor of the motor, and the other end of the second air pipe communicates with the air mouth in the swinging arm. According to the invention, the air path is stable during work of the crystal taking device.

The invention provides a crystallization method for improving a czochralski monocrystal. The crystallization method comprises the step: sequentially adding a silicon raw material and a barium carbonate powder into a quartz crucible at an initial charging stage of the czochralski monocrystal. The quartz crucible comprises a body; the body comprises a transparent layer and an air bubble layer whichare sequentially arranged from inside to outside; and the outer wall of the body is provided with an outer coating. The invention provides the crystallization method suitable or pulling P-type and N-type silicon single crystal rods, the technical problem that barium carbonate powder is repeatedly added during repeated charging to increase the content of a barium element in a silicon liquid so as to result in low crystallization rate of the czochralski monocrystal is solved, not only can the crystallization rate of monocrystal pulling be increased, but also the content of the barium element inthe silicon liquid can be effectively controlled, the process is simplified, the production efficiency is increased, and the production cost is reduced.