13results about How to "Deposition stability" patented technology

The invention relates to the technical field of mullite brick production, in particular to a mullite brick production pouring device which comprises a conveying frame. The storage barrel is arranged above the conveying frame through a supporting frame; the fixing frame is fixedly mounted on the top surface of the conveying frame; the air cylinder is fixedly installed on the top face of the fixing frame, and the telescopic end of the air cylinder penetrates through the top face of the fixing frame; the pressing plate is fixedly installed at the telescopic end of the air cylinder. Compared with the prior art, by arranging the pressing plate and the cleaning assembly, in the resetting process of the pressing plate, a third transmission gear drives a connecting rod to rotate, a coil spring accumulates force, and when the pressing plate is completely reset, the coil spring releases energy, drives the connecting rod to rotate reversely and drives a reciprocating lead screw to rotate, so that a sliding plate is driven to slide back and forth along a guide rod, and a cleaning scraping plate cleans the bottom face of the pressing plate; the bottom face of the pressing plate can be automatically cleaned after the pressing plate is used every time, residues are prevented from affecting next-time use, and therefore automatic cleaning of the bottom face of the pressing plate and collection of materials are achieved.

The invention relates to a fiber-containing ceramic product, in particular to a forming die and a forming method of a ceramic matrix composite slender thin-wall shaft part, which are used for solving the problems that an existing preparation method of a ceramic matrix composite slender thin-wall pipe fitting is only suitable for a thin-wall pipe with the diameter smaller than 20mm and cannot meet the requirements of parts with larger sizes; and as the fiber fabric cannot be sewed, the problems of layering and low yield in the forming process are aggravated. The forming mold of the ceramic matrix composite thin-walled shaft part comprises the core mold, the core mold is formed by splicing the multiple sub core molds, demolding operation is simple, the core mold is not affected by sewing fibers when retreating, and the situation that a prefabricated body is layered or cannot be demolded in the demolding process can be effectively avoided.

The invention discloses a high-entropy alloy fiber material of a core-shell structure and a preparation method and application thereof, and belongs to the technical field of alloy material preparation.The method comprises the steps that a buffering agent is dissolved in deionized water to obtain a solution A, the solution A is heated, a complexing agent, additional salt, a reducing agent and soluble metal salt are sequentially added, stirring and dissolving are conducted, and a solution B is obtained; adjusting the pH value of the solution B, and standing at room temperature to obtain an electrolyte; performing ultrasonic cleaning, flushing and drying on the conductive fibers with acetone, ethanol and deionized water respectively; a saturated calomel electrode is used as a reference electrode, a conductive fiber is used as a working electrode, a carbon electrode bar is used as a counter electrode, the three electrodes are immersed in an electrolyte, a constant-potential electro-deposition method is used, electro-deposition is carried out on the surface of the conductive fiber, and the high-entropy alloy fiber is obtained. Uniform electro-deposition of the high-entropy alloy on the surface of the fiber is achieved, and the high-entropy alloy fiber material with excellent conductivity is obtained.

The present invention discloses a method for synthesizing large-sized quartz glass by multi-torch CVD, comprising the following steps: igniting the torches to preheat the furnace; introducing hydrogen, oxygen and silicon tetrachloride into each torch until the temperature and pressure in the furnace are in a stable state; increasing the flow rate of hydrogen, oxygen and silicon tetrachloride introduced into each torch, driving the carrier to rotate and lift to the reference point to start deposition to 90% of the carrier depth; stopping the introduction of silicon tetrachloride into the outer ring torch, and continuing to deposit on the surface of the deposition lump to the target height; stopping the introduction of raw materials, and unloading the lump after natural cooling. The present invention adopts multiple groups of torches arranged in inner rings, middle rings and outer rings, and the torch flames do not interfere with each other, and the furnace temperature distribution can be accurately controlled, thereby improving the uniformity of large-sized synthetic quartz lumps, and at the same time improving the preheating efficiency and deposition efficiency; controlling the raw material supply of different ring torches in the two stages of stable deposition, and realizing uniform and stable deposition of large-sized synthetic quartz lumps.

According to the anti-caries mouthwash composition provided by the invention, the effective components of mouthwash comprise fluoride, casein phosphopeptides-amorphous calcium phosphate (CPP-ACP) and bioactive glass (BAG) in a specific ratio, and the chemical composition, surface modification and particle size distribution of the bioactive glass are limited, so that the anti-caries mouthwash composition can be used for preventing caries on the premise of reducing the concentration of the fluoride. The anti-caries effect is not obviously worsened, and meanwhile, a better remineralization effect is achieved.

The invention relates to the technical field of ceramics, provides a preparation method of ultrathin aluminum nitride, and solves the problems that an aluminum nitride film prepared in the prior art is relatively thick and is easy to crack and peel off. Comprising the following steps: 1) preparing raw materials: preparing the following raw materials: a pure metal Al target material and a (0001) surface sapphire substrate; 2) pretreatment; 3) loading a sample and vacuumizing; (4) cleaning the chamber and carrying out reverse sputtering; (5) sputtering; and (6) carrying out step-by-step thermal annealing to obtain the ultrathin aluminum nitride.

This invention provides a method for metal interconnection of flexible circuits, comprising the following steps: coating a first dielectric layer; depositing a first metal layer and photolithographically etching a first metal pattern; coating a second dielectric layer and photolithographically etching interlayer vias; depositing a second metal layer and photolithographically etching a second metal pattern, wherein the second metal pattern overlaps with the first metal pattern; coating a third dielectric layer and photolithographically etching contact windows; and fabricating metal contacts. The beneficial effects of this invention are that the overlapping of the upper and lower metal layer patterns improves the reliability of vertical interconnection between metal layers, reduces lateral etching, improves etching accuracy, effectively avoids open circuits in flexible circuits, enhances the interconnection quality of flexible circuits, improves the fracture resistance of fine lines in flexible circuits, facilitates high-density wiring in flexible circuits, constructs thick electrical contact points, reduces contact resistance, improves signal transmission quality, and enhances the mechanical strength and wear resistance of the contacts.

The invention provides a preparation method of a silicon nitride waveguide, and relates to the technical field of semiconductors. The preparation method comprises the following steps: depositing a silicon oxide layer on the surface of a substrate; depositing a monocrystalline silicon layer with a preset thickness on the surface of the silicon oxide layer, wherein the preset thickness is any value in the range; photoresist coating, developing treatment and etching treatment are sequentially carried out on the monocrystalline silicon layer, so that the monocrystalline silicon layer with a preset horizontal distance is reserved on the surface of the silicon oxide layer from the edge to the center, and the preset horizontal distance is any one value ranging from 4 micrometers to 6 micrometers; and depositing a silicon nitride layer on the surfaces of the monocrystalline silicon layer and the silicon oxide layer, and sequentially carrying out developing treatment and etching treatment to prepare the silicon nitride waveguide. The stress matching degree between the silicon nitride layer and the silicon oxide layer in the silicon nitride waveguide is improved, the risk of stripping of the silicon nitride layer is reduced, and the product yield is improved.

The invention discloses full-dimensional super-amphiphobic concrete as well as a preparation method and application thereof. Ethanol, ammonia water, tetraethyl orthosilicate and fine sand are sequentially added into an aqueous solution of a cationic surface active agent and stirred, and a fine sand solution coated with silicon dioxide is obtained; adding silica sol into the fine sand solution coated with silicon dioxide, then adding a hydrophobic modifier while stirring, and then stirring to obtain modified super-amphiphobic fine sand; filtering, cleaning, drying and crushing the modified super-amphiphobic fine sand solution to obtain modified super-amphiphobic fine sand; the preparation method comprises the following steps: wetting cement powder by using an alkyl siloxane absolute ethyl alcohol solution, carrying out dry mixing treatment on the wetted powder in a mixing bottle added with agate balls, drying and crushing to obtain modified hydrophobic cement powder; and putting the modified super-amphiphobic fine sand and the modified hydrophobic cement powder into an aqueous solution containing a surfactant and a dispersant, and then stirring to form the full-dimensional super-amphiphobic concrete slurry.

The application discloses a lithium battery charging control method, which comprises the following steps: obtaining the battery health degree of a lithium battery pack when the lithium battery pack is in a battery recharging state during the driving of a target electric vehicle, the lithium battery pack being arranged in the target electric vehicle; obtaining the current cell temperature of the lithium battery pack when the battery health degree is less than a set health degree; recharging the lithium battery pack by using a pulse charging mode when the current cell temperature is detected to be within a preset temperature range; and controlling the charging parameter in the recharging process by using the pulse charging mode to be a target charging parameter according to the battery health degree. The lithium battery charging control method, electronic equipment and storage medium disclosed by the application can effectively reduce lithium dendrites in the lithium battery, thereby improving the charging and discharging performance and service life of the lithium battery.

The utility model relates to the technical field of industrial environmental protection, in particular to a wet-type limestone / lime-gypsum method two-stage circulation desulfurization device which comprises a desulfurization tower and further comprises a liquid accumulation disc arranged in the desulfurization tower and used for dividing the desulfurization tower into a lower circulation desulfurization area and an upper circulation desulfurization area. The pH value in the lower circulating desulfurization area is 4.0-5.0, the pH value in the upper circulating desulfurization area is 5.5-6.0, and a lower slurry spraying layer is arranged in the lower circulating desulfurization area. According to the utility model, a relatively independent double-circulation desulfurization system is formed in one desulfurization tower, and the desulfurization of flue gas is jointly completed by the double-circulation desulfurization system. And a single-tower double-region desulfurization system solves the problems that the pH values of slurry required by absorption and oxidation are different, the pH value of slurry for absorbing acid gases such as SO2 is higher and is about 5.5, and the pH value of an oxidation crystallization region is required to be lower than 5.0, so that the effects of improving the desulfurization rate and improving the utilization rate of an absorbent are achieved by using the double-region method.

The utility model discloses a treatment device for cleaning sewage of a valve body of an electromagnetic valve. An inlet of the settling box is communicated with the sewage collecting box; the settling box is provided with a containing cavity, an opening is formed in the bottom of the settling box, a blocking plate is arranged at the bottom of the settling box, the blocking plate is pivotally connected with the settling box, the opening is blocked when the blocking plate is in a first state, and the opening is opened when the blocking plate is in a second state; the magnet is arranged on one side of the blocking plate away from the settling box; the first scraper is arranged on one side, close to the settling box, of the blocking plate; one end of the first guide rod is connected with the blocking plate, the lower edge of the first scraper abuts against the surface of the side, close to the settling box, of the blocking plate, a first guide hole is formed in the first scraper, and the first guide rod movably penetrates through the first guide hole. In sewage treatment, after deposition is finished, sewage in the settling box is discharged, when the blocking plate is in the second state, the first scraper blade is moved, sediments on the surface of the blocking plate are rapidly cleaned through the scraper blade, the cleaning effect is good, and the efficiency is high.

The invention belongs to the technical field of nanostructure manufacturing, and discloses a metal nanoarray structure prepared on graphene in an in-situ controllable mode and a preparation method thereof.The preparation method comprises the steps that a silicon wafer serves as a substrate, and a graphene layer is prepared on the silicon substrate through a mechanical stripping method; a silicon cantilever beam containing raw material molecules is installed on an atomic force microscope to scan the prepared substrate, a high-resolution surface topography image is generated, and after a flat position without obvious defects is selected according to the topography image, the tip of the silicon cantilever beam makes contact with the graphene or the surface of the silicon substrate; and then positive voltage is applied to the tip, the retention time and the load are adjusted, so that the metal nanometer material is deposited near the tip, and a metal nanometer array structure is formed. By means of the method, in-situ controllable manufacturing of the size, the morphology, the composition, the structure and the position of the metal particles on the surface of the graphene can be achieved. Therefore, the material can be better popularized and applied in the technical fields of electronics, optics, catalysis, sensing, field emission, display devices and the like.