43results about How to "Inhibition defect" patented technology

The invention provides a method and a system for inhibiting an aluminum magnesium alloy laser deep penetration welding pore defect, and relates to the technical field of aluminum magnesium alloy laser welding, and the method comprises the following steps: S1, polishing the surface of an aluminum magnesium alloy welding plate, and carrying out chemical cleaning decontamination; s2, the aluminum-magnesium alloy welding plate is fixed through a welding tool, and the aluminum-magnesium alloy welding plate is restrained through a high-temperature clamp; s3, the aluminum-magnesium alloy welding plate is welded through double-light-spot laser, the front light spot is pretreated, and the rear light spot is subjected to deep penetration welding; s4, the scanning interval and the scanning width of the laser beams are adjusted and set through galvanometer parameters; and S5, the preset laser power, the preset welding speed and the preset shielding gas flow are adopted for completing laser welding. According to the method, high-quality welding of the medium-thickness plate aluminum alloy can be achieved.

The invention belongs to the field of solar cells, and particularly relates to a flexible tin-lead perovskite solar cell and a preparation method thereof.A passivation solution is introduced between a tin-lead perovskite light absorption layer and an electron transport layer for passivation treatment, and due to the fact that the passivation solution contains C = O groups or-NH2, the flexible tin-lead perovskite solar cell can be applied to the field of solar cells. The coordination with Sn < 2 + > and Pb < 2 + > in the perovskite light absorption layer can be simultaneously generated, and the defects existing at the perovskite interface can be obviously passivated. Therefore, the tin-lead perovskite solar cell can play a role in inhibiting oxidation of the perovskite layer, and meanwhile, the non-radiative recombination condition of current carriers is reduced, so that the performance of the tin-lead perovskite solar cell is greatly improved.

This invention provides a glass melt conveying device and its temperature control method, comprising an inner wall, an outer wall, and a cavity disposed between the inner and outer walls; both the inner and outer walls are made of refractory materials; the surface of the inner wall is provided with an anti-erosion layer; multiple inner wall temperature detectors are uniformly arranged in the inner wall; the outer sides of the two walls of the cavity are respectively attached to the inner and outer walls; multiple supports are uniformly arranged in the cavity; the two ends of the supports are respectively fixed to the inner sides of the two walls of the cavity. This invention can achieve a heat preservation effect on the bottom and sides of the glass melt through the anti-erosion layer, preventing related defects caused by temperature differences. At the same time, using non-precious metals such as molybdenum as the anti-erosion layer to prevent the glass melt from eroding greatly reduces construction costs; for platinum tube-type glass melt conveying devices, molybdenum electrode heating can be used instead of platinum heating in the high-temperature section, eliminating the situation where the entire channel is electrified, thereby improving production safety.

The present invention belongs to the technical field of photoelectric functional materials and devices, and discloses a halide perovskite film with improved photoelectric conversion performance, a preparation method and an application thereof. The present invention uses europium chloride, 2-thenoyltrifluoroacetone containing rich functional groups (-CF3, thiophene) and 1,10-phenanthroline to synthesize a new rare earth complex Eu(tta) 3 Phen is added to the perovskite precursor solution, and finally the halide perovskite film of the present invention is prepared by the anti-solvent method. The prepared halide perovskite film is applied to perovskite solar cells, and its average photoelectric conversion performance is improved to 20.40%, and even exceeds 21% when in the best state. At the same time, it has better humidity stability, thermal stability and UV resistance, and has broad application prospects in future applications.

The present invention provides a substrate cleaning method, which includes the following steps: supplying a mixed gas of a cluster-forming gas that forms clusters through adiabatic expansion and a carrier gas with a smaller molecular weight or atomic weight than the cluster-forming gas to a nozzle; forming the clusters by ejecting the mixed gas from the nozzle; removing particles attached to the substrate through the clusters; and continuing to supply the carrier gas to the nozzle during a set time from the time when the supply of the cluster-forming gas to the nozzle ends.

The invention discloses a method for preparing a ceramic part by adopting fused deposition, which comprises the following steps: weighing ceramic powder, a low-molecular-weight polymer, stearic acid, an ethylene-vinyl acetate copolymer, polyethylene, polyvinyl butyral and a plasticizer, mixing to obtain a blocky feed, crushing and sieving to obtain a granular printing feed, and sintering to obtain the ceramic part. And the feed is added into a stock bin of an FDM3D printer, a printing blank is prepared through fused deposition, the printing blank is subjected to isostatic pressing forming, an air pressure melting process, degreasing, glue discharging and sintering, a ceramic blank is obtained, precision machining and polishing are conducted, and the ceramic part is obtained. According to the method disclosed by the invention, a ceramic fused deposition technology, an isostatic pressing molding technology and an air pressure melting technology are subjected to synergistic interaction, so that the density and interlayer bonding strength of the green body are obviously improved, and the ceramic part has high mechanical property and reliability.

Provided is a friction stir welding method for an electromagnetic steel strip, with which it is possible to suppress the occurrence of a fracture in a coiled material joint section on a production line due to deterioration in mechanical characteristics and deterioration in shape of the coiled material joint section, with high construction efficiency. The post-cooled double-sided friction stir welding is performed on the basis of conditions such that the steel structures of the bonded portion and the hot-working-affected portion formed by the welding each become a ferrite-phase-oriented structure and the relationships of formulae (1) to (4) are satisfied at the same time.

The invention discloses a terrazzo for a combined layer. The terrazzo is prepared from the following components in parts by weight: 750 to 850 parts of white cement, 100 to 160 parts of silica powder, 150 to 220 parts of calcium-silicon mineral admixture, 900 to 1100 parts of white quartz sand, 100 to 120 parts of coarse aggregate, 5 to 10 parts of alkali-resistant glass fiber, 10 to 100 parts of toner, 170 to 200 parts of water, 4 to 6 parts of modified cellulose ether, 1 to 1.5 parts of defoaming agent and 25 to 35 parts of polycarboxylate superplasticizer. The modified cellulose ether is borate crosslinking modified cellulose ether. The terrazzo decorative layer material has excellent anti-sagging performance, mechanical performance and durability, has certain thixotropy, is suitable for structural design of various special-shaped combined layers with various facades and curved surfaces, and can effectively widen the application range of terrazzo in the field of decoration-structure integrated design.

The purpose of the present invention is to provide a processing liquid for semiconductor production, said processing liquid being capable of suppressing deterioration of lithography performance or generation of defects, and being capable of producing a fine resist pattern or a fine semiconductor element. A processing liquid for semiconductor manufacturing according to an embodiment of the present invention contains a compound (A) satisfying requirement (a), one or more compounds (B) satisfying requirement (b), and one or more inorganic substances (C) containing any element selected from Al, B, S, N, and K. Here, the total content of the compound (B) is 10 <-10 >-0.1 mass%, and the ratio (P) of the compound (B) represented by formula I to the inorganic substance (C) is 10 < 3 >-10 <-6 >.

The invention discloses a preparation process of air entrapment prevention low-bubble moisture curing reaction type polyurethane honeycomb glue, and relates to the technical field of chemical synthesis processes. The process comprises the following steps: firstly, introducing sacrificial isocyanate, and converting deep bound water in polyhydric alcohol into gas and deeply removing the gas in cooperation with pulse type nitrogen gas stripping and reverse vacuum linkage; and then carrying out high-temperature solubilization hysteresis treatment to forcibly dissolve by-product particles so as to eliminate bubble nucleation centers. In the polymerization stage, a reaction type low-surface-energy modifier is adopted for in-situ end capping, and the surface tension of the melt is reduced; a negative pressure gradient cooling procedure is executed in the discharging stage, the vacuum degree is gradually increased along with cooling, and the gas under-saturation state of the glue solution is locked. According to the invention, the hidden danger of endogenous bubbles is effectively eliminated, the finished product glue solution is endowed with the capabilities of inhibiting mechanical gas entrapment and actively absorbing interface bubbles during roll coating, and the flatness and bonding quality of the composite honeycomb plate are remarkably improved.

The invention relates to the technical field of quantum dots, and discloses a core-shell quantum dot and a preparation method thereof, and a display device, the preparation method comprises the following steps: S1, providing a reaction system containing a quantum dot core; s2, gradient heating is conducted on a reaction system in the step S1, meanwhile, a first selenium precursor is added, after the temperature is stable, a zinc precursor and a second selenium precursor are added, a ZnSe shell layer grows outside the quantum dot core in a coating mode, the activity of the first selenium precursor is higher than that of the second selenium precursor, and the activity of the zinc precursor is lower than that of the second selenium precursor. The molar ratio of the first selenium precursor to the second selenium precursor is (1-3): 2. After nucleation is finished, gradient heating is adopted when a ZnSe shell is wrapped, and meanwhile, a high-activity first selenium precursor is added, so that core-shell interface component rearrangement can be promoted, and interface defects caused by core-shell lattice mismatch are eliminated to the maximum extent; after the high temperature is stable, a second selenium precursor with low activity is injected, so that the shell layer of the quantum dot uniformly and epitaxially grows, and the defects between the core and the shell are further eliminated.

[Problem] The present invention aims to provide an aqueous solution for manufacturing electronic devices capable of suppressing defects. [Solution] An aqueous solution for manufacturing electronic devices, comprising: an acid (A); a surfactant (B); and a solvent (C); wherein the acid (A) has a pKa (H2O) of 3.0 or less, and the number of carbon atoms contained in one molecule of the acid (A) is 0 to 8; the surfactant (B) substantially contains no ethylene oxide repeating units and no propylene oxide repeating units; and the solvent (C) contains water (C-1). The aqueous solution for manufacturing electronic devices is a high-performance material that can be used in nanotechnology processes for semiconductor device manufacturing, for example, in manufacturing processes for semiconductor devices for controlling liquid crystals, quantum dots, or OLED displays formed on a substrate.

The invention belongs to the technical field of continuous casting, and particularly relates to an on-line heating method for a surface layer and a subsurface of a large-section casting blank, which comprises the following steps of: arranging heating devices in front of straightening rollers of a large-section casting blank continuous casting machine, between the straightening rollers and between support rollers in front of the straightening rollers, and heating an area within 20mm between the surface layer and the subsurface of the large-section casting blank, the temperature of the surface layer and the area within 20 mm under the surface of the large-section casting blank ranges from the lower temperature limit of the thermoplastic temperature interval of the cast steel grade to 1250 DEG C before a straightening roll and in the straightening process, and the percentage reduction of area of the surface layer and the area within 20 mm under the surface of the large-section casting blank is larger than or equal to 0.4. By controlling the temperature of the surface layer of the casting blank and the temperature of the area within 20 mm under the surface in front of the straightening roll and in the straightening process, the surface layer and subsurface plasticity of the large-section casting blank is improved, defects generated in the straightening process of the casting blank are remarkably restrained, and the surface layer quality and the yield of the casting blank are improved.

The present invention relates to a perovskite light-emitting diode. According to the present invention, by replacing PEDOT:PSS contained in a conventional hole transport layer with an anionic conjugated polymer having an ammonium-based counter ion, the degradation of the light-emitting device characteristics caused by PEDOT:PSS can be prevented, and by passivating the defects of the perovskite light-emitting layer with a hole transport layer containing a conjugated polymer and improving crystal growth, the light-emitting characteristics can be greatly improved.

A kind of low vacuum laser welding method for GH4169 high-temperature alloy and SS304 stainless steel, the present application belongs to laser welding technical field.The present application solves the problem that the existing welding method cannot realize the low-cost and high-quality connection of medium thickness and above GH4169 alloy and SS304 stainless steel.One, welding assembly;Two, low vacuum laser welding;Three, heat treatment.The present application is used for the low vacuum laser welding of GH4169 high-temperature alloy and SS304 stainless steel.

The invention belongs to the technical field of pipe manufacturing and intelligent control, and solves the problems of longitudinal cracks, scratches, pits, non-uniform size and overlarge residual stress on the surface caused by thermal-mechanical coupling imbalance in existing pipe extrusion molding. The invention discloses a pipe forming system based on real-time defect feedback. The pipe forming system comprises an execution device, a central control device, a multi-mode sensing device and a three-section type temperature control device. A three-area temperature control structure of a primary cooling section, a constant temperature section and a final cooling section is adopted, a multi-mode sensing device is arranged at an outlet of each section to collect surface images, wall thickness and temperature data in real time, a defect characteristic spectrum is constructed, and a thermal coupling regulation and control instruction is output by matching with a process knowledge base; stress relaxation and shaping control is achieved through constant-temperature section partition heating and final cooling section gradient cooling, and meanwhile process parameters are dynamically corrected in combination with closed-loop feedback compensation. The method can effectively inhibit pipe surface defects, reduce residual stress, improve wall thickness uniformity and mechanical properties, and improve production stability and product qualification rate.

The invention discloses a method for preparing a perovskite thin film through evaporation and application of the perovskite thin film in a perovskite photovoltaic device, the method comprises the following steps: S1, a substrate is placed in an evaporation cavity, co-evaporation of inorganic salt and an inducer is carried out, the inorganic salt comprises lead iodide, and the inducer is selected from one or more of cuprous iodide, methyl iodide and hydroiodic acid; s2, organic salt is evaporated, annealing treatment is carried out, and the perovskite thin film is formed on the surface of the substrate; the organic salt comprises FAI. According to the invention, the strong coupling effect of lead iodide and FAI is increased by introducing the inducer in the sequential evaporation process, the reaction of lead iodide and FAI is promoted, and the perovskite thin film with low defect and high crystal quality is obtained. The invention further provides a method for preparing the perovskite photovoltaic device through full evaporation, industrial production of perovskite solar cells can be achieved, and the prepared perovskite photovoltaic device has high conversion efficiency and good stability.

The invention discloses a method and device for collaboratively preparing a weld multi-level heterogeneous structure by using dual laser beams, and relates to the field of aluminum alloy material welding. The preparation device comprises an optical fiber laser with a galvanometer system, a short-wave laser, a dual-band composite swing welding head, an optical path system, a robot control system, a cooling system and a protection device. The preparation method comprises: using an optical fiber laser to perform swing filling welding, wherein the weld filling material is an Al-Si-Mg-Cu-Zn-Sn alloy, so as to obtain a weld with a heterogeneous grain structure; at the same time, using a short-wave laser to bake the weld online, so as to promote the composite precipitation of multiple nanophases and to distribute them in a gradient in the depth direction of the weld. By using the device and the method, an aluminum alloy weld with a multi-level heterogeneous structure combination can be prepared, and the comprehensive performance of the weld joint is collaboratively improved, thereby solving the problem of mismatch between the strength and plasticity of the heat-treatable and strengthened aluminum alloy fusion weld.

The application discloses a kind of micro-nano hard ceramic phase composite reinforced laser cladding nickel-based wear-resistant coating and its preparation method and application.The preparation method uses discharge plasma ball milling process to mix micro-nano hard ceramic and Ni-based metal powder for modification treatment, utilizes the synergistic effect of plasma activation and mechanical ball milling force of pulse discharge, effectively breaks the nano ceramic phase agglomerate, realizes the uniform dispersion distribution of nano ceramic phase in composite powder;By adopting the optimization of laser cladding process parameters, and cooperating with ultrasonic vibration auxiliary and / or pulse laser composite energy input, etc. Regulating means, prepare the nickel-based wear-resistant coating with uniform and dense structure, high hardness, excellent wear resistance and good metallurgical bonding with base material, which can meet the service requirements of mining machinery, oil drilling and production, metallurgical roller and other harsh working conditions, and has wide application prospect.

The purpose of the present invention is to provide a method for producing a release film for molding a resin sheet. A method for producing a mold release film for molding a resin sheet, the method comprising: a coating step for coating a mold release layer-forming composition on a surface layer A of a polyester film having the surface layer A, the surface layer A being a layer substantially not containing inorganic particles; the release layer forming composition at least comprises a cationic curable polydimethylsiloxane (a) and an acid generator (c); a drying step for heating and drying the polyester film coated with the release layer-forming composition, the heating and drying comprising a first drying step and a subsequent second drying step, the drying temperature T1 in the first drying step being higher than the drying temperature T2 in the second drying step; and a photocuring step in which, after the drying step, the release layer-forming composition is cured by irradiation with active energy rays.

The application discloses a kind of resource utilization of ceramic glaze of raffinate acid, it is the powder prepared with raffinate acid as main raw material;Each raw material and its weight fraction included are as follows: raffinate acid 16-20 parts, citric acid 5-8 parts, alcohol additive 4-7 parts, water 5-10 parts.The application takes industrial by-product raffinate acid as main raw material, fully recycles and utilizes effective elements in raffinate acid, further combines the regulation and control mechanism based on citric acid and alcohol additive and segmented temperature control process, and can realize high value-added resource utilization of raffinate acid in glaze field, with significant economic and environmental benefits;The obtained ceramic glaze can give consideration to good sintering crystallization effect, gloss and mechanical property, and has wide applicability.

Embodiments of the present application provide a display panel, a preparation method thereof and a display device. The display panel comprises: a substrate; a light-emitting layer arranged on one side of the substrate; and a polarization gain layer arranged on a side of the light-emitting layer away from the substrate; wherein: the polarization gain layer comprises one layer or a plurality of layers of optical gain layers arranged in sequence in a direction away from the substrate, at least one layer of the optical gain layers has a patterned region, and corresponding to the patterned region, the optical gain layer comprises a first gain body and at least one protruding structure, the protruding structure is arranged on a side of the first gain body away from the substrate, and the orthographic projection of the at least one protruding structure on the substrate is symmetrically distributed along a peeling direction. Embodiments of the present application can improve the light-emitting efficiency.

The multi-layer composite film comprises a transition layer which is deposited and fixed on a substrate, and an aluminum oxide film and a nickel-based film which are alternately deposited based on the transition layer, the adjacent aluminum oxide film and the nickel-based film form a processing cycle; the single-layer thickness of the aluminum oxide film is 0.2 to 0.8 [mu] m; the thickness of a single layer of the nickel-based thin film is 1.2 to 2.0 microns; and the thickness ratio of the aluminum oxide film to the nickel-based film is 1: 2-1: 10. The pure aluminum film and the nickel-based film are alternately deposited on the transition layer to form a functional multilayer structure, so that the problem of low sputtering rate of the aluminum oxide film is solved, columnar growth of the nickel-based film is effectively inhibited, defects and cracks are reduced, and the density and uniformity of the film are improved.

The utility model discloses a kind of multi-band photon polishing devices based on spectrum feedback, including sealed cabin, multi-axis guide rail polishing system being located in sealed cabin, multi-axis guide rail polishing system makes workpiece along x, y, z three-axis linkage and can rotate;Sealed cabin top two sides stand from outside to inside sequentially arranged 1064nm laser and its collimation, beam expansion, galvanometer, field lens component and 355nm ultraviolet laser and its collimation, beam expansion, galvanometer, field lens component;Photon polishing head device cabin is built-in support rod and photon polishing head, photon polishing head integrates spectrum acquisition sensor;Sealed cabin is equipped with cabin pressure, oxygen concentration sensor;Spectrum feedback controller independent of laser system real-time acquisition surface spectrum and closed-loop regulation laser power, scanning speed and polishing head vibration parameter;Through infrared and ultraviolet laser cooperative heating and photon vibration polishing, realize defect suppression, residual stress regulation and control, surface hardness and wear resistance promotion, complete complex curved surface and microstructure's high efficiency low-damage polishing.

The invention discloses a non-polar surface micro light-emitting diode (Micro-LED) with an independent mesa structure and a preparation method of the non-polar surface micro light-emitting diode (Micro-LED), full relaxation of an epitaxial structure is realized based on selective area epitaxy and lateral epitaxy, and generation of defects in an epitaxial layer can be effectively inhibited. Meanwhile, mutually independent Micro-LED functional layers such as quantum wells are grown on mutually independent mesas, so that the Micro-LED can be prepared without etching damage of the quantum wells, the etching damage of the quantum wells caused by reducing the size of the LED through process etching in a traditional scheme and non-radiative recombination additionally caused by the etching damage of the quantum wells are eliminated, and the efficiency of the Micro-LED is effectively improved. The invention provides a new structure and a new method for preparing the Micro-LED, and is beneficial to promoting commercial application of the Micro-LED.

The present invention is a method for manufacturing a joined body by friction stir welding of a member to be welded using a rotating tool (F) having a stir pin (F2) having a spiral groove formed therein, the method including, in this order, an insertion step in which the stir pin (F2) is inserted into the spiral groove, and a welding step in which the stir pin (F2) is inserted into the spiral groove. In a joining step in which a stirring pin (F2) is inserted into a member to be joined while a rotating tool (F) is rotated in the same direction as the direction in which a spiral groove is formed, a changing step in which the rotating direction of the rotating tool (F) is changed so as to rotate in the opposite direction to the direction in which the spiral groove is formed, and a joining step in which the stirring pin (F2) is inserted into the member to be joined while the rotating tool (F) is rotated in the same direction as the direction in which the spiral groove is formed. The engagement of the member to be engaged is performed in a state in which the rotary tool (F) is rotated in a direction opposite to the direction in which the spiral groove is formed.

The invention relates to a multilayer structure having a paper layer (A), an inorganic vapor-deposited layer (B) with a specific average thickness located on one side of the paper layer (A) having a specific basis weight, a barrier resin layer (C) containing a specific ethylene-vinyl alcohol copolymer (c) as the main component, an adhesive resin layer (D), and a heat-fused layer (E) containing a polyolefin (e) satisfying a specific melting point as the main component. Layers (B), (C), and (D) are all directly stacked in sequence, with layer (E) being the outermost layer. The ratio of the total average thickness of the layers with polyolefin resin as the main component to the total average thickness of all layers except the paper layer (A) is 0.50 or more, and the invention does not have a layer containing a resin with a melting point of 200°C or more as the main component or a metal layer with an average thickness of 1 μm or more.

The invention relates to the technical field of perovskite batteries, and discloses thin film deposition equipment, a preparation method of a perovskite thin film and a preparation method of a battery. The thin film deposition equipment comprises a cavity and a first heat exchange assembly and / or a second heat exchange assembly, and the cavity is hollow and contains a to-be-deposited material; the first heat exchange assembly comprises a plurality of first heat exchange structures arranged on the side wall face of the cavity in a surrounding mode, a first temperature gradient is formed in the height direction of the cavity, and a longitudinally-changing first temperature field is formed in the cavity. The second heat exchange assembly comprises a plurality of annular second heat exchange structures which are horizontally arranged on the top face of the cavity in a nested mode. A second temperature gradient is formed in the outward direction of the annular center, and a transversely-changing second temperature field is formed in the cavity. The first heat exchange assembly and the second heat exchange assembly transmit energy to the dispersed to-be-deposited material in the cavity in a radiation mode, the gas phase material obtains the temperature field gradient and the moving or diffusing energy gradient in the whole cavity, and precise regulation and control of the deposition rate and direction are achieved.

The objective of this invention is to provide a semiconductor processing solution that inhibits the dissolution of cobalt and suppresses the formation of defects after further water rinsing following processing of a silicon substrate. The semiconductor processing solution of this invention comprises water, an organic solvent, a corrosion inhibitor, a chelating agent, and an alkaline compound, and does not contain any of hydroxylamine or its salts. The alkaline compound is an alkaline inorganic compound or has a composition selected from -NH2 and -NHR. N -NR N 2 and -N + R N 3 X ‑ The organic solvent is an alkaline organic compound with a molecular weight of less than 150 and at least one group in the group consisting of the above-mentioned organic solvent, and the content of the above-mentioned organic solvent is 0.1 to 9.5 by mass relative to the total mass of the above-mentioned semiconductor processing liquid.

The present invention relates to a release film for resin sheet molding. The object of the present invention is to provide a release film which can mold a resin sheet, particularly a ceramic green sheet, of an ultra-thin layer without defects by making a release film having a release layer with particularly excellent smoothness and peelability. A release film for resin sheet molding, having a polyester film as a base material and a release layer, wherein the polyester film has a surface layer A substantially free of inorganic particles, and the release layer is formed on the surface layer A, and the release layer is a layer formed by curing a release layer-forming composition, and the release layer-forming composition contains a cationically curable polydimethylsiloxane (a), and the area surface average roughness (Sa) of the release layer is 2 nm or less, and the number of protrusions of 10 nm or more in height present on the surface of the release layer is 200 / mm 2 The following.