35results about How to "Avoid Bubble Defects" patented technology

The invention relates to a production method of ultra-low-carbon, low-silicon, low-manganese and low-aluminum steel continuous casting blank. The continuous casting blank is composed of the followingchemical components of, in percentage by mass, less than or equal to 0.004% of C, less than or equal to 0.006% of Si, less than or equal to 0.06% of Mn, less than or equal to 0.010% of P, less than orequal to 0.010% of S, less than or equal to 0.004% of Alt, less than or equal to 0.02% of Cu, less than or equal to 0.02% of Cr and less than or equal to 0.02% of Ni, and the balance Fe and inevitable impurities; and the production process route of the continuous casting blank comprises the following steps of molten iron pretreatment, desulfurization, converter smelting, LF refining, RH vacuum treatment and continuous casting. Through the converter smelting, the LF refining, the RH vacuum treatment and the continuous casting technology, so that the chemical components are obtained to meet therequirement of the molten steel, the deoxidization effect and the liquidity of the molten steel are ensured, and casting by a small square billet continuous casting machine to obtain a steel billet with good surface and internal quality.

The invention relates to an interconnecting wire structure and a forming method thereof. A semiconductor substrate is provided; the forming method of the interconnecting wire structure comprises the steps of forming multiple independent interconnecting wires on the semiconductor substrate, wherein grooves are formed between adjacent interconnecting wires; forming a first interlayer dielectric layer to cover the interconnecting wires, and filling a groove in part of the first interlayer dielectric layer until an opening is formed; forming a second interlayer dielectric layer to cover the first interlayer dielectric layer, wherein the opening is sealed by the second interlayer dielectric layer to form an air gap; flattening the second interlayer dielectric layer. The interconnecting wire structure formed by the forming method is improved in quality, and the forming method is simple in process and low in process cost.

The invention discloses a preparation method of a three-layer gradient GIS/GIL supporting insulator, which aims at reducing the electric field intensity of an insulator along a surface or a local region as an optimization target, and solves the optimal spatial distribution of a dielectric constant in the supporting insulator by using a variable density algorithm. According to the optimization result, the dielectric constant change area is divided into a dielectric constant transition area and a high dielectric area, the combination contour of the dielectric constant transition area is extracted, and then a hollow dielectric constant transition area with a support and a resin sprue gate is generated through photocuring 3D printing; a thermocurable high-dielectric composite material is prepared by adopting a high-dielectric filler/polymer blending mode, and then the high-dielectric composite material is poured into the dielectric constant transition area and integrally put into a metal mold for fixing; and a thermocurable high-dielectric composite material is prepared in a low-dielectric filler/polymer blending mode, then the thermocurable high-dielectric composite material is poured into a metal mold, and the three-layer gradient GIS/GIL supporting insulator can be obtained after curing is completed in vacuum.

The invention provides a method for preparing large-size sapphire single crystals by means of bubble generation. The method includes loading, vacuum, heating dissolving, seeding, shouldering, stripping, equal-diameter growing, pulling, annealing, blowing-out, argon filling cooling and blowing-in steps and the like. The method has the advantages that original technological procedures for growing 85 kg crystals are improved to obtain the method, the single crystallinity of the crystals is guaranteed by the aid of the stripping step, cracking of the crystals can be effectively prevented, defects such as small-angle crystal boundary stress and the like can be effectively overcome, the high-quality 120 kg-grade sapphire single crystals with the sizes of phi 350*380 mm can be prepared by the aid of the method, and requirements on sapphire growth in the current military and civil fields in China further can be met.

The invention discloses a copper and aluminium composite bar casting system comprising a head manufacturing device, a transmission chain, a material loading device, a plurality of driving rollers, a tipping gear, a casting machine with a spring clip, a locating clip, a vibration device on the locating clip, a low-voltage casting device, an unloading tipping gear, a material supporting conveyer and a material storage conveyer. The invention realizes the automation of the copper and aluminium composite bar casting, lowers the labor intensity of workers and improves working efficiency.

The invention discloses a composite film, a preparation method and an electronic component. The composite film comprises a film substrate, a first isolation layer, a bonding layer, a second isolationlayer and a support substrate which are stacked in sequence, wherein the bonding layer is formed by performing hydrophilic bonding on a first amorphous silicon layer and a second amorphous silicon layer and then performing heat treatment, and the bonding layer comprises a first silicon oxide layer and a second silicon oxide layer. Through bonding of the first amorphous silicon layer and the secondamorphous silicon layer, the composite film has good bonding capability, so that the problem that a film substrate is easy to peel off from a support substrate in the subsequent cutting process of the prepared composite film is solved. Meanwhile, water molecules exist between the first silicon oxide layer and the second silicon oxide layer, so that the water molecules between the first silicon oxide layer and the second silicon oxide layer can be diffused into the first isolation layer and the second isolation layer, and the defect that bubbles are generated in the functional film layer in the film substrate due to generation of water vapor is avoided.

The invention provides a preparation method of a flexible insulating plate, the obtained flexible insulating plate, a flexible laminated plate and a preparation method and application thereof, the preparation method of the flexible insulating plate comprises the following steps: dipping an ultrathin fiber layer with a thickness of 8-25 [mu] m in a glue solution of a first fluororesin, and carryingout first curing to obtain a prepreg; coating or spraying the glue solution of the second fluororesin to the two sides of the prepreg, curing for the second time, and repeatedly coating or spraying and curing until the total mass percent of the first fluororesin and the second fluororesin is 60%-95% so as to obtain a semi-finished product; carrying out heat treatment on the semi-finished productto obtain a fiber-reinforced fluororesin layer; and laminating and forming one, two or more fiber reinforced fluororesin layers to obtain the flexible insulating plate. The flexible insulating plate and the flexible laminated plate have the characteristics of low dielectric loss, small thickness, good flexibility and the like, and have a greater application prospect in future high-frequency and miniaturized devices.

The invention relates to a vacuum autoclave used for motorcycle helmet production and a motorcycle helmet forming process. The vacuum autoclave comprises an autoclave body and a forming device. The forming device comprises a vacuum bag, a forming mould arranged in the vacuum bag, and a connector connected to the vacuum bag and communicating with the forming mould. One end of the autoclave body isfixedly connected with a closed component. A heating device is arranged in the closed component. The other end of the autoclave body is connected with an autoclave door. The autoclave body is connected with a vacuumizing device used for communicating with the connector. A gas exhausting device and a gas inlet pipe are arranged on the outer wall of the autoclave body in the length direction of theautoclave body in sequence. The gas inlet pipe communicates with a gas inlet device. By means of the vacuum autoclave used for motorcycle helmet production and the motorcycle helmet forming process, the impact strength of a motorcycle helmet is effectively improved, the product quality is improved, and the problem that the impact strength of a motorcycle helmet is low is solved.

The embodiment of the invention discloses a piezoelectric substrate structure for a filter and a preparation method thereof, the piezoelectric substrate structure comprises a piezoelectric substrate, a first low acoustic resistance layer, a second low acoustic resistance layer and a support substrate which are stacked in sequence, and the surfaces of the first low acoustic resistance layer and the second low acoustic resistance layer are bonded after plasma activation. Water molecules between the first low-acoustic-resistance layer and the second low-acoustic-resistance layer can be diffused into the first low-acoustic-resistance layer and the second low-acoustic-resistance layer, so that the defect that the piezoelectric substrate generates bubbles due to the generation of water vapor is avoided; in addition, the existence of the first low-acoustic-resistance layer can effectively block proton exchange between H in water molecules between the first low-acoustic-resistance layer and the second low-acoustic-resistance layer and Li in the piezoelectric substrate, so that the original piezoelectric property of the piezoelectric substrate is ensured; moreover, since no water film exists between the piezoelectric substrate and the first low-acoustic-resistance layer, compared with the prior art, the acoustic resistance effect of the first low-acoustic-resistance layer and the second low-acoustic-resistance layer can be improved, and the radio-frequency signal loss of the surface acoustic wave filter can be reduced.

The invention discloses a spiral jet polyurethane upper-connected shoemaking device. The device comprises a base, a bottom die device, a left side die and a right side die and further comprises a spiral jet device used for spraying raw materials. The invention further discloses a multi-component polymer mixed spiral jet flow shoemaking preparation process. The process comprises the steps: a bottom die moves to the outer portions of the left side die and the right side die; a plurality of polymer raw materials are added into a feeding mechanism of the spiral jet flow device and sprayed to the shoe sole in a spiral airflow mode, and a jet flow layer used for combining the shoe upper and the shoe sole is formed; and the left mold and the right mold press the shoe last to be combined with the bottom mold, and the polymer jet flow layer sprayed on the shoe sole expands and enters the shoe upper and the shoe sole in a diffusion and permeation mode, so that the shoe upper and the shoe sole can be combined. The bottom die can be conveniently and rapidly replaced and cleaned, the spiral jet flow device can conveniently spray raw materials on the bottom die, widened special shoes and boots can be produced, the jet flow amount is large, the edge track of a formed jet flow conical surface is clear, and the device is suitable for production of all the shoes and boots.

The invention discloses a method of depositing films. The method comprises the following steps: performing film depositing on a semiconductor wafer, pre-treating the surface of the semiconductor wafer to remove carbon polymer particles remained on the surface of the semiconductor wafer, and then performing film deposition. The method of depositing films can be used for preventing formation of bubbly defects as the carbon polymer particles are covered below the films by virtue of the film deposition.

The invention discloses a device for removing low molecular substances in casting PBX slurry. The device comprises a storage hopper, a distribution tray and a receiving hopper, wherein the storage hopper and the receiving hopper are connected into an integral body in an up-and-down sealing mode; the distribution tray is connected and sealed in a discharge port end surface of the storage hopper; distribution holes with diameters of 2-8mm are distributed in the distribution tray; the neck of the discharge port of the storage hopper is provided with a plug valve; the side surface of the receiving hopper is connected with a vacuum extractor, and the neck of the discharge port is provided with a plug valve; and when the two plug valves are closed simultaneously, the receiving hopper can become a closed space. The invention also discloses a method for removing low molecular substances in casting PBX slurry by using the device. The invention can be used for successfully removing air, styrene and other low molecular substances in the casting PBX slurry, and avoid the defects of bubbles in the slurry, thereby enhancing the internal quality and safety performance of the casting PBX slurry. The invention has wide application prospects in conventional warhead PBX slurry.

The invention discloses a multi-component polymer mixing spiral jet device. The device comprises a screw mixing mechanism, a feeding mechanism and a spiral gas path jet mechanism, wherein, the spiral gas path jet mechanism comprises a beam gas path, a spiral gas path and a spiral jet flow plate arranged at a discharge port of the screw mixing mechanism; the spiral jet flow plate comprises a nozzle arranged in the center and a plurality of beam gas path holes which are circumferentially distributed by taking the nozzle as the circle center and are in communication with the beam gas path; a plurality of spiral gas path holes communicating with the spiral gas path are annularly distributed in the inner side wall of the nozzle and are converged to a port of the nozzle. According to the multi-component polymer mixing spiral jet device, the mixed multi-component polymer can be sprayed to the solid surface in a particle spiral jet flow mode, the jet flow amount is large and can reach 10g/s-30 g/s, the edge track of the formed jet flow conical surface is clean, the atomization splashing and particle reflection conditions cannot be generated, it can be guaranteed that the jet area is clean and tidy, and the device is suitable for being used when the solid surface is sprayed with a high-viscosity polymer coating.