129results about How to "Poor improvement" patented technology

The invention discloses a method for preparing silicon carbide particle reinforced aluminum-based composites. The method comprises the steps: (a) using silicon carbide particles (SiCp) of different particle diameters according to a volume ratio of 1:1-2:1 to obtain mixed silicon carbide particles, adding the mixed silicon carbide particles to a mixer and stirring for 1-3.5 hours; (b) adding binder and pore-forming agent to the silicon carbide particle mixtures of different particle diameters, uniformly stirring; (c) delivering the silicon carbide particles on a press to obtain preforms by pressing, drying and preserving the preforms at a temperature of 80-120 DEG C; (d) pre-sinttering the SiCp mixture performs to obtain SiCp blanks; (e) removing impurities of the SiCp blanks, carrying out preoxidation for 1-2.5 hours at constant temperature of 1000-1100 DEG C; and (f) changing aluminum alloy in such a way: placing aluminum matrix material and the SiCp blanks together, adopting a free-infiltration method and maintaining the temperature for 2-4 hours to obtain the silicon carbide particle reinforced aluminum matrix composites. The preparation technology in the invention is simple, with a low cost and is easy to be realized.

The invention relates to a solar battery piece packaging glue structure and a preparation method thereof. The structure comprises a packaging glue layer and at least one partitioning membrane layer, or comprises a packaging glue layer, at least one layer of partitioning membrane and at least one adhesive layer distributed on one side, which is close to a battery piece, of the partitioning membrane, wherein the partitioning membrane is compounded with the packaging glue layer, or the partitioning membrane is compounded with the packaging glue layer and the adhesive layer; the flowability of the partitioning membrane is smaller than that of the packaging glue layer. According to the solar battery piece packaging glue structure, as one layer of the partitioning membrane with very low flowability is compounded with the packaging glue and the flowability of the partitioning membrane self is lower than that of the packaging glue, the packaging glue is harder to overflow, and moreover a good partitioning function is achieved for overflowing of the packaging glue with high flowability. When the structure is laminated, the packaging glue of a cross-linking system with high flowability at a lower layer can be fused with the partitioning membrane with low flowability at an upper layer at high temperature, so that sufficient binding force can be still maintained.

The invention provides a cleaning method and back-side defect reworking method for a large-size sapphire substrate before annealing. The cleaning method for the large-size sapphire substrate before annealing is characterized in that a ground sheet is cleaned in a chemical tank and then manually brushed and scrubbed so that the surface granularity and cleanliness of the sapphire substrate can be effectively improved; and finally, acid-base soaking, drenching and spin-drying are conducted, the surface cleanliness of the annealed substrate reaches the standard that black and white points, color differences, fingerprints and stains are avoided, and the yield of the substrate can reach 90% or over. The invention further provides the back-side defect reworking method. By the adoption of the back-side defect reworking method, the problem that the roughness of the back side is inconsistent due to pure manual polishing can be solved. The cleaning method and back-side defect reworking method for the large-size sapphire substrate before annealing have the characteristics that dust on the surface of the sapphire substrate can be effectively reduced or removed, back-side defects of the substrate are greatly reduced, and the yield of finished products is greatly increased.

The invention discloses a combined carbonaceous reducing agent for smelting metal silicon and a preparation method thereof. The combined carbonaceous reducing agent comprises refined pulverized coal and petroleum coke powder, wherein the refined pulverized coal accounts for 70-80% of the total weight; the refined pulverized coal is prepared from the raw material soft coal by oil agglomeration selective flocculation de-ashing treatment; the refined pulverized coal contains 75-80% of fixed carbon, 3.5-4.5% of ash content and 16-21% of volatile content by weight; and 2-3% of binder is added into the mixture of the refined pulverized coal and the petroleum coke powder, and then a combined carbonaceous reducing agent pellet is prepared by cold press molding briquetting and drying treatment. According to the invention, the ash content and impurities in the soft coal are removed by a flotation method, the petroleum coke powder serves as supplement of the fixed carbon, and the two are combined to obtain a combined carbonaceous reducing agent with high content of fixed carbon, low ash content and low content of impurities. Through the invention, the problem that the reducing effect is unsatisfactory by using the soft coal only is solved, the smelting efficiency and the product quality are improved, and the added value of the soft coal is increased.

The invention discloses a preparation method of a transparent toughened polystyrene functional color masterbatch and belongs to the technical field of polymer material modification. The preparation method is characterized in that GPPS as a base resin raw material, MBS and an oily flexibilizer as main functional assistants, a transparent pigment, and various processing auxiliary agents are mixed uniformly; and the mixture is mixed by a double-screw extruder and then is cut into the transparent toughened polystyrene functional color masterbatches by a water loop heating granulator. Through mixing use of the transparent toughened polystyrene functional color masterbatches and the GPPS raw material, material toughness is improved; undesirable effects produced by stress cracking on a workpiece is improved obviously; and transparent color effects of the GPPS raw material are obtained. The transparent toughened polystyrene functional color masterbatch does not influence material transparency, has wide application prospects in fields of household electrical appliance, office supplies, electronic and electrical products and package, and is especially suitable for injection molding of transparent refrigerator drawers.

The invention discloses an enhanced high electron mobility transistor and a manufacturing method thereof. The high electron mobility transistor comprises a buffer layer, a source electrode, a drain electrode, multiple P-N junctions and a grid electrode, wherein the buffer layer is epitaxial on a substrate; the source electrode and the drain electrode are formed on the buffer layer; the P-N junctions formed by multilayer stacks are formed on the buffer layer and between the source electrode and the drain electrode; the grid electrode is formed on the stacks of the P-N junctions; and each P-N junction is composed of a P-type semiconductor and an N-type semiconductor. The enhanced high electron mobility transistor and the manufacturing method thereof can improve the problem of poor efficiency of a depressed gate structure or an enhanced gallium nitride transistor manufactured by a carbon tetrafluoride plasma processing mode in the prior art, and greatly improve the threshold voltage of the enhanced high electron mobility transistor.

The invention relates to a method for driving a liquid crystal display (LCD) device, and the LCD device comprises m lines and n rows of display pixels as well as one row or a plurality of rows of virtual pixels, and each of the pixels is controlled by a thin film transistor, each line of pixels are connected with a scanning beam, each row of display pixels are connected with a data link, and each row of virtual pixels are connected with a compensating data link, wherein, compensating data is generated for each line of pixels according to the whole polarity of the display data; the polarity of the compensating data is opposite to the whole polarity of the line of display data, wherein, m and n are signless integral. The method for driving the LCD device can improve the defect caused by the coupling of public voltage and enhance the display quality.

The invention of roll changing tension controlling technology for 300 series stainless steel belongs to the field of heat-rolled steel control, which is controlled by the two-level computer. Its features are: the second-level computer completes sending the setting value, the coefficient of changing tension and the mark for distinction of different kinds of steel, the first computer completes the control of coiling changing tension to realize the automatic controlling production. The advantages are: 1. It resolves the allocation and release of hot strip coiling strip head and internal stress, 2. It can improve the shape of coiler, especially the head bad shape, 3. It solves the problem of over-current in coiler and saves the investment of equipment, 4. It also provides protection for improving the quality of 300-series cold-rolled stainless steel, and improves the problem of bad shape of head.

The invention discloses a surface treatment technology before conducting paint spraying on metal. The surface treatment technology comprises the following steps that (1) surface oil-removing treatment is conducted; (2) primary washing treatment is conducted; (3) acid pickling treatment is conducted; (4) secondary washing treatment is conducted; (5) primary sand blasting treatment is conducted; (6) surface soaking treatment is conducted; (7) secondary sand blasting treatment is conducted; and (8) cooling treatment is conducted. According to the surface treatment technology before conducting paint spraying on the metal, special surface treatment is conducted on a metal workpiece material before paint spraying, the surface performance of the metal workpiece material is effectively improved, the combining capacity of the metal workpiece material and coating is enhanced, the protecting effect of a paint coating is promoted, and the surface treatment technology has good using and promoting value.

The invention relates to a method for carrying out surface processing on an electronic circuit board (PCB) by a developing machine after welding prevention processing, which comprises the following procedures of processing by a first developing trough, primary wind pressure tube water prevention, processing by a second developing trough, secondary wind pressure tube water prevention, processing by a third developing trough, tertiary wind pressure tube water prevention, medium pressure washing, processing by a punching water jet scalpel, composite washing, processing by a sponge roller, cold air drying, hot air drying, inspection and the like. In the invention, after spray disks of the developing troughs are structurally regulated and the punching water jet scalpel is added, no residual ink is generated at the bottom of a blink hole and no phenomenon of poor hole blockage of a through hole is generated; by a wind pressure water prevention mode, the defect that after the ink is rolled by the roller, the copper surface of the PCB is stained with the ink can be improved and the amount of printing ink on pad can be reduced; the water using amount can be saved; the speed of the developing machine can be improved, the production efficiency is promoted, the scrappage is reduced and the yield rate of the PCB can be promoted.

The invention provides a pixel compensation circuit used for an active organic light-emitting diode display. The pixel compensation circuit comprises a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch and an organic light-emitting diode, wherein the control end of the first switch receives drive signals of the (N-1)-level grid electrode; the control end of the second switch receives an ignition control signal; the control end of the third switch receives drive signals of the N-level grid electrode; the control end of the fourth switch is electrically coupled to the first end of the first switch; the second end of the fifth switch is electrically coupled to the second end of the third switch; the control end of the sixth switch receives ignition control signals; the control end of the seventh switch receives drive signals of the N-level grid electrode; the anode of the organic light-emitting diode is coupled to the second end of the sixth switch, and the cathode of the organic light-emitting diode is coupled to a second voltage. Compared with the prior art, the fourth switch and the fifth switch form a bigrid framework, and the second end of the fifth switch is electrically coupled to the second end of the third switch, so that the situation of electricity leakage between a source electrode and the drain electrode of the third switch can be prevented, and a poor dimly bright point generated in a low gray-scale image is improved.

PET nanocomposite materials exhibit improved physical properties in a PET composite as a result of the intercalation of non smectite-type clay materials while maintaining transparency and barrier properties. In some aspects, kaolin particles are modified with potassium acetate (KAc) to increase interlamellar distances and improve particle dispersion. In other aspects, calcined kaolin particles are used and may be chemically treated by an aqueous alcohol solutions method. Any loss in the molecular weight of PET composite can be offset by the further incorporation of surface compatibilizers such as silane coupling agents and other process additives such as molecular chain extenders.

The invention discloses an MBS bridge type rectifier welding procedure, including the following steps: a, chip P face prewelding is carried out, namely a soldering flake with uniform soldering tin amount is used for carrying out chip P face prewelding, so as to ensure N face of chip to be even; b, a solder paste wetting pen is used for wetting solder paste, namely the solder paste wetting pen is used for wetting quantitative solder paste on a tablet; c, a prewelding chip is positioned, namely the even N face of chip is positioned on the tablet by virtue of solder paste with higher viscosity after the step b; d, the tablets are combined; e, tunnel furnace welding is carried out. The invention has the beneficial effects that: soldering flake with uniform soldering tin amount is used for carrying out P face prewelding, so that solder paste amount of P face of chip can be fully ensured to certain extent; solder paste with higher viscosity is used for positioning the chip, thus overcoming the defect of welding deviation as viscosity of soldering flux is not high enough; the method has extremely less investment and operation convenience; time for manually adjusting deviated chip is greatly reduced, and efficiency is improved by more than 2.5 times; and the original welding deviation reject ratio is reduced to 0% from 15%.

The invention provides a high-end PCB metallization groove processing method. The high-end PCB metallization groove processing method is characterized by comprising the following steps of cutting material, drilling a hole one, sinking copper, board electricity, outer layer line, drawing electricity, drilling a hole two, etching, welding resistance, text, metallization, forming, FQC, FQA and packaging successively. The high-end PCB metallization groove processing method can effectively avoid the forming milling cutter from directly contacting with the metal wall of the special-shaped hole whenprocessing, thereby improving the defects of special-shaped hole burrs and the copper rolling; therefore, the product yield is greatly improved.

The invention belongs to the technical field of lithium battery slurry preparation, and particularly relates to a lithium battery negative electrode slurry dry preparation method. The method comprisesthe following steps: powder premixing, powder infiltration, powder kneading, high-speed stirring, slow stirring defoaming, sieving and discharging. All powder materials are put into a stirring tank of a stirrer, and the stirring effect is achieved through the steps of powder premixing, powder soaking, powder kneading, high-speed stirring, slow stirring defoaming and the like. The stirring effectof the lithium battery negative electrode slurry is improved and the production efficiency of the stirring process is improved in a dry stirring manner, so that the poor pole piece caused by the conditions of particles, lineation and the like due to the fact that the slurry is not uniformly dispersed in the coating process of the slurry is improved; a glue making step in the prior art is cancelled, so the slurry preparation time is shortened, and the powder stirring time can be saved by about 5 h in each batch; and the solid content of the slurry is increased and can be increased to 54-56% from 48-50% through conventional stirring, and the use amount of deionized water is reduced.