99results about How to "Thickness is easy to adjust" patented technology

The invention relates to a 2-2 type ferroelectrics-ferrite multilayer composite magnetoelectric material and the preparation method, which relates to a ferroelectrics-ferrite multilayer composite magnetoelectric material. The invention consists of a ferroelectrics and a ferrite, the ferroelectrics and the ferrite materials are composed by adopting a layered alternate arrangement mode, wherein, the ferroelectrics material selects a lead zirconate titanate PbZr0.52Ti0.48O3 ceramics, and the ferrite selects a cobalt ferrite CoFe2O4 ferrite ceramics. An organic solvent, a plasticizer, a dispersant and a bonding agent are added in PZT powder and are ball milled and mixed to obtain a paste; the paste is treated with screening, defoaming and doctor blade casting to obtain an electrolyte thin film green, demoulding and cutting are carried out; the organic solvent, the plasticizer, the dispersant and the bonding agent are added in CFO powder and are ball milled and mixed to obtain the paste; the paste is treated with screening, defoaming and doctor blade casting to obtain the electrolyte thin film green, the demoulding and cutting are carried out; the PZT green and the CFO green are overlapped alternatively, a multi-layer composite green material is obtained by heating and pressurizing, roasting and hydrostatic pressure processing are carried out, and then sintering and molding are carried out for preparation.

The invention relates to the field of a high-frequency copper-clad plate of a polytetrafluoroethylene (PTFE) dielectric substrate, and in particular relates to a preparation method of a polytetrafluoroethylene (PTFE) composite dielectric substrate used for a microwave circuit. The method comprises the steps of firstly, mixing fluororesin emulsion, inorganic filler and a thickening agent to prepare stable and uniform dispersion liquid; after that, enabling a release type base material to be coated with the dispersion liquid, and then baking; after baking, carrying out release type separation on a resin layer and the base material; cutting and overlapping the separated resin layer according to the thickness and the size of the substrate; covering the two sides of the resin layer with copper foils, and carrying out high-temperature lamination sintering to obtain the PTFE composite dielectric substrate covered by the copper foils at the double sides. After the preparation method is used, the formation of a hole in the composite dielectric substrate and the residue of an organic auxiliary agent are effectively reduced; the preparation method has the advantages of being simple and convenient in technology, beneficial to large scale production, etc.

The invention discloses a plate-type sludge dewatering machine and a dewatering method therefore. The plate-type sludge dewatering machine adopts elastomers positioned among pressing filter plates, adjacent anti-thrust filter plates, air-inlet filter plates, feeding filter plates and thrust filter plates to form at least three hermetic pressing filter chambers variable in volume, utilizes the compression deformation and resilience of the elastomers to deep squeeze and dewater a filter cake, and adopts sealing plugs which are arranged in front of air-inlet holes of the air-inlet filter plates and the thrust filter plates and are on positions opposite to feeding holes on the feeding filter plates and the anti-thrust filter plates, wherein the feeding filter plates are adjacent and involutory to the air-inlet filter plates. After low-pressure filter dewatering is over and feeding is stopped, the sealing plugs block and seal the feeding holes so as to prevent sludge from flowing back and entering pipelines during pressing filtration. The dewatering method adopts the variable hermetic pressing filter chambers formed by the elastomers to perform pressing filtration and dewatering, and adds the operation of adopting the sealing plugs to block the feeding holes before high-pressure squeezing-dewatering operation. The invention has the advantages of high dewatering efficiency, strong adaptability, low energy consumption, low use cost and the like.

The invention relates to a preparation method of a pH responsive polyion liquid composite membrane. The preparation method comprises the following steps in sequence: (1) directly preparing a polyion liquid composite membrane through in situ polymerization after mixing a polymeric imidazole monomer, an acrylonitrile monomer, a crosslinking agent and an initiator; (2) performing ion exchange on the polyion liquid composite membrane in the step (1) and an anionic dye to obtain the pH responsive polyion liquid composite membrane, wherein the structural formula of the anionic dye is one of the structural formulas as shown in the specification. Control of responses of the polyion liquid composite membrane to different pH ranges can be achieved by adopting simple and direct anion exchange. The designed polyion liquid membrane is simple, has good reusability and is short in response time.

The invention discloses an improved log sawing machine, which comprises an operating desk, a saw bench and a saw blade device. The saw bench is arranged on the operating desk. The saw blade device is connected with the operating desk in a sliding mode. The saw blade device is arranged on the saw bench. The saw bench is provided with at least one clamping device of magnetic type. The operating desk is provided with at least two adjustable clamping devices. The log sawing machine has the advantages of being compact in structure, small in occupied area, achievable in adopting an ordinary feed screw nut pair for driving the reciprocating motion of the saw blade device, achievable in adopting a travel switch for simple control, high in cutting efficiency, low in labor intensity and convenient to operate. Furthermore, the improved log sawing machine is a practical woodworking machinery product of mechanical and electrical integration, and has a certain promotion value; the clamping device has a good improved effect, thereby being suitable for clamping logs of different sizes.

The invention provides a production method of toughened vacuum glass. The production method of the toughened vacuum glass comprises five steps of manufacturing a supporting point, performing excessive toughening treatment on plate glass, compounding, sealing and vacuumizing, wherein in the sealing step, the periphery of the gap between two pieces of excessively toughened glass which are mutually combined is coated with lead-free low-melting-point glass powder containing an infrared material for absorbing short wave, and the two pieces of excessively toughened glass are conveyed into an edge sealing furnace to be melted by a short wave infrared heating method so as to seal the gap between the two pieces of excessively toughened glass. According to the production method of the toughened vacuum glass, the heating time of the toughened vacuum glass in the edge sealing process can be shortened and the toughening strength of the toughened vacuum glass is guaranteed.

The invention discloses a preparing method of integument controlled release grain fertilizer, which comprises the following steps: blending 2-4 kinds of organic composition to form mixing solution; adding filming activist and filming accelerant to form film mixing liquid; spraying 1-20% film mixing liquid on the grain fertilizer surface evenly under -20-50 deg.c; forming integument on the surface of grain surface after 2-120 min.

The invention relates to a carbon sphere/sulfur/reduced and oxidized graphene composite material for a lithium sulfur battery and a preparation method of the carbon sphere/sulfur/reduced and oxidizedgraphene composite material. The preparation method comprises the following steps: firstly, performing the heat treatment or solution soaking sulfur precipitation compounding for sulfur and carbon spheres, then mixing and stirring a sulfur/carbon sphere complex and a binder to form slurry, smearing the slurry onto an aluminum foil, drying the aluminum foil, then placing the aluminum foil in graphene oxide dispersion liquid, depositing and reducing the graphene oxide by virtue of electrochemical reduction, and thus obtaining the reduced graphene oxide-sealed sulfur/carbon sphere composite anodematerial. The carbon sphere prepared by the method of the invention has rich surface creases and inner porous structure and higher specific surface area (1000m<2>/g), and can load more sulfur, wherein the content of the solid sulfur reaches up to 80 percent. The reduced graphene oxide layer has higher conductivity and rich porous structure, facilitates the passing of lithium ions, can effectivelyinhibit the loss of sulfur and poly-sulfide, can improve the conductivity and cycling stability of the sulfur/carbon sphere composite material, and has a higher practical prospect.

The invention discloses a nano-fiber surface-modified xenogeneic acellular nerve graft and a preparation method thereof. The nano-fiber surface-modified xenogeneic acellular nerve graft consists of an xenogeneic acellular nerve graft and a degradable polyester nano-fiber membrane adhered onto the surface of the xenogeneic acellular nerve graft, wherein the xenogeneic acellular nerve graft is an extracellular matrix obtained by performing acellular disposal on an isolated peripheral nerve of a healthy mammal. The nano-fiber surface-modified xenogeneic acellular nerve graft is extremely low in moisture content after freeze-drying treatment and stable in performance, and can realize no protection liquid and normal-temperature preservation after being sterilized and packaged. The nano-fiber surface-modified xenogeneic acellular nerve graft disclosed by the invention is wide in source, low in cost, free from immunogenicity, good in biocompatibility and safe to use; a microstructure of the peripheral nerve extracellular matrix is completely retained, and a natural pipeline bracket and a nutrition environment are provided for nerve axonal regeneration and nerve conduction function recovery.

The present invention discloses the preparation of micron/submicron micro lens array on polymer surface and belongs to the field of nanometer/micron micro structure material and preparing technology. The preparation process is combination of self-assembling process and pressure molding process, and includes the first preparation of micron/submicron print die plate via combination of colloid crystal template and hot treatment technology, and the subsequent hot press demolding to prepare micron/submicron micro lens array. The present invention has the advantages of low cost, simple technological process and apparatus, capacity of mass production, high micro lens performance, etc.

The invention discloses an eggshell cobalt-based Fischer-Tropsch synthesis catalyst which comprises an active ingredient and a carrier, wherein the catalyst comprises the raw material by weight percent: 5 to 40 percent of cobalt oxide and the balance being metallic ball carriers; the interiors of the metallic ball carriers are provided with uncorroded metal materials, and the outer layers of the metallic ball carriers are metal oxide. The catalyst has the advantages of being simple in preparation process, low in cost, controllable in shell layer thickness and applicable to large-scale production.

The invention relates to a slicing device of fruit and vegetable foods. The slicing device of the fruit and vegetable foods comprises a frame, the frame is of a cuboid shape, a material guiding grooveused for placing fruit and vegetable raw materials is internally formed in the upper part of the frame, the front part and the rear part of the material guiding groove communicate with each other, the top of the material guiding groove is opened, a lifting type cutter mechanism located over the front end opening of the material guiding groove is arranged on the front side of the top of the frame,a base plate is internally arranged on the bottom of the frame, the base plate is provided with a power driving mechanism, the power driving mechanism is connected with the lifting type cutter mechanism through a power transmission mechanism, a slice-thickness adjusting mechanism arranged on the front side of the lifting type cutter mechanism is arranged on the top of the frame, and a magnetic adsorption mechanism used for driving the fruit and vegetable raw materials to move forwards along the material guiding groove and arranged on the rear side of the lifting type cutter mechanism is arranged on the top of the frame. According to the slicing device of the fruit and vegetable foods and a slicing method of the slicing device, design is novel, the structure is simple, manual work is onlyneeded to put in the fruit and vegetable raw materials, the labor intensity is greatly lowered, the slicing efficiency is high, the thicknesses of slices are coincident, and the thicknesses of the slices are conveniently adjusted.

The invention relates to a method for manufacturing a printed circuit board. The method for manufacturing the printed circuit board of the present invention comprises: a first coating layer formation step for forming a first coating layer on one surface of a substrate using conductive ink; a second coating layer formation step for forming a second coating layer on the other surface of the substrate using the conductive ink; a punching step for forming a through-hole by punching the first coating layer, the substrate, and the second coating layer; and a plating step for forming a plating layer by plating the first coating layer, the second coating layer, and an inner wall surface of the through-hole. Accordingly, the present invention provides the method for manufacturing the printed circuit board and the printed circuit board, which: can improve circuit pattern implementation accuracy and electrical properties through a conventional photography process when compared to the limitation of circuit pattern implementation and electric properties in a circuit fabrication process due to the existing printing method; can save base materials; can shorten a manufacturing process; and can improve productivity.

The invention relates to a metal ion indicating film, and a preparation method and use thereof. The metal ion indicating film is obtained by soaking a special polyionic liquid film in a Rhodamine B aqueous solution. Different chromogenic reactions occur when the indicating film is placed in a Cu<2+> or Ag<+> ion containing solution, and the color of the film changes differently, so that Cu<2+> ions and Ag<+> ions in the solution can be very conveniently tested qualitatively. Meanwhile, the metal ion indicating film provided by the invention is the polyionic liquid film, is simple and environment-friendly in preparation process, and is good in mechanical property and stability. In general, the metal ion indicating film provided by the invention can be used to qualitatively analyze Cu<2+> ions and Ag<+> ions quickly and is low in cost.

The invention provides an MB2-based ultrahigh-temperature ceramic coating which comprises an ultrahigh temperature ceramic body coating, an ultrahigh temperature ceramic body is composed of MB2-M1Si-Mo-SiC and comprises the following components in percentage by volume: 40-60% of MB2, 20-40% of M1Si, 20-40% of Mo and 0-20% of SiC, wherein the MB2 comprises HfB2 and ZrB2, the volume ratio of the HfB2 to the ZrB2 is 4: 1-1: 4, the M1Si comprises one or more of MoSi2, CrSi2, ZrSi2 and TaSi2, and the volume ratio of the MoSi2 to the CrSi2 to the ZrSi2 to the TaSi2 is (0-4): (0-4): (1-8): (0-2). Theinvention further provides a preparation method of the MB2-based ultrahigh-temperature ceramic coating. The ceramic coating is good in ablation resistance, good in spraying manufacturability, excellent in medium-high temperature oxidation resistance, compact in structure and strong in combination with a matrix. The method is simple in process, coating components and thickness are easy to control,and production efficiency is high.

The invention discloses an organic/inorganic hybrid nanometer porous anti-reflection coating layer; the organic/inorganic hybrid nanometer porous anti-reflection coating layer, with the thickness of 42.5-162.8nm, porosity of 23.2%-56.9% and aperture of 5-10nm, is gained through a sol-gel process by taking poly-(methyl methacrylate-b- methacryloxypropyltriethoxysilane) as precursor or through the sol-gel process by taking the mixture of the poly-(methyl methacrylate-b-methacryloxypropyltriethoxysilane) and tetraethyl orthosilicate; the invention takes the micro-phase morphology of the block copolymer after the micro-phase separation as a template so as to prepare the organic/inorganic hybrid nanometer porous anti-reflection coating layer; the aperture size is easy to be controlled; furthermore, the distribution of the aperture is uniform, and the basic framework of the anti-reflection layer has Si-O-Si structure; the organic/inorganic hybrid nanometer porous anti-reflection coating layer has excellent mechanical performance, creasing resistance and friction resistance, is rich in Si-OH functional group and can effectively solve the adhesion problem caused by anti-reflection coating layers and various substrates prepared by the prior art.

The invention relates to an EPDM heat-insulation layer material, and a preparation method and an application thereof, specifically to a windable EPDM heat-insulation layer material and a preparation method and an application for the windable EPDM heat-insulation layer material, belongs to the technical field of heat insulation of solid rocket motors, and specifically relates to an EPDM heat-insulation material which can be prepared into a raw adhesive tape, is applicable to a winding molding process and has excellent comprehensive performance. According to the invention, through addition of polar rubber into EPDM rubber for reinforcement, an unvulcanized heat-insulation layer material has certain tensile strength, and is easily prepared into a strip-shaped heat-insulation layer and wound into a disk, so continuous molding and mechanized operation can be realized.

The invention discloses a copper busbar drawing device, which comprises a base plate, wherein a drawing die plate is fixedly connected to one end of the middle of the top end of the base plate, a shaping die plate is arranged in the middle of the drawing die plate, an H-shaped adjusting frame is arranged at the top end of the shaping die plate, a first adjusting nut is arranged in the middle of the top end of the drawing die plate, an arc-shaped positioning clamp block is arranged on one side of the first adjusting nut, the bottom end of the arc-shaped positioning clamp block is slidably connected with a movable rail groove, a supporting frame is arranged in the middle of the top end of the drawing die plate, a rotating rod is arranged at one end of the supporting frame, and a first fixed supporting rod is arranged on one side of the rotating rod. The copper busbar drawing device has the beneficial effects that the thickness of a drawing die hole in the drawing device can be conveniently adjusted, the copper busbar drawing thickness can be conveniently adjusted, the practicability is good, the drawn copper busbar can be conveniently lubricated, the drawn copper busbar can be prevented from being damaged by friction in the drawing process, oil can be conveniently brushed on the copper busbar, and time and labor are saved during oil brushing.

The invention discloses a preparation method of a silicon dioxide/nickel core-shell nano-structure material. The preparation method comprises the following steps: preparing SiO2 microspheres, dispersing the SiO2 microspheres in water, mixing the SiO2 microspheres with cationic polyelectrolyte to obtain positively charged SiO2 microspheres after modification, dispersing the positively charged SiO2microspheres in water, mixing the positively charged SiO2 microspheres with an anionic polyelectrolyte to obtain negatively charged SiO2 microspheres after modification, mixing the negatively chargedSiO2 microspheres, a soluble salt of nickel, sodium citrate, lactic acid and water, uniformly stirring the materials, adding a reducing agent into the mixture, and reducing the mixture to obtain the silicon dioxide/nickel core-shell nano-structure material. According to the preparation method, the surface of silicon dioxide does not need an activating treatment process, the process is simple, theperformance is controllable, the production period is short, the production energy consumption is greatly reduced, and the preparation method is suitable for large-scale industrial production. In thefinally prepared product, the nickel content and the thickness of the nickel shell are adjustable and the purity of the nickel coating is high.

The invention discloses an orthopedic traction rack. The orthopedic traction rack comprises a base and a support platform, and the support platform is provided with support pads; a support plate is provided with a gripping part for being gripped by the hand, movable rods are rotatably connected to the two ends of a fixing plate, and the inner side of the end of each movable rod is provided with asleeve; support rods are hinged to the upper end of a first telescopic rod, the end of each support rod is provided with a foot fixing device, and leg fixing devices are movably arranged in the middles of the movable rods. The orthopedic traction rack has the advantages that the gripping part is arranged at the two sides of the support platform and assists a patient in gripping during traction; the waist support pad is internally provided with an airbag to facilitate thickness adjustment, the demands of the patient are met, and the comfort is improved; the end of the hip support pad is provided with a strip-shaped pad, and the body of the patient is prevented from moving downwards during traction; the angle between the two movable rods is conveniently adjusted, and the position is conveniently fixed in cooperation with the fourth support rods; leg support frames are provided with latex pads and are softer and more comfortable.

The invention relates to a high-performance and high-integration-level L-shaped gate-control schottky barrier tunneling transistor. A schottky barrier formed between a source electrode and an intrinsic silicon source section is used as a tunneling barrier of a device, the characteristic that the barrier height of the schottky barrier is smaller than the silicon band gap is adopted, on the premise that materials narrower than the silicon band gap do not need to be introduced, the tunneling probability higher than that of a common silicon-material-based PIN type tunneling field effect transistor is achieved, and therefore the subthreshold slope and the electric current conduction capacity of the device are accordingly improved. An L-shaped gate electrode is adopted for controlling an intrinsic silicon channel region with the groove structure characteristics; on one hand, the good control effect on the width of the schottky barrier is achieved; on the other hand, the control effect of the gate electrode on a heavy doping drain electrode region is weakened, and the high-performance and high-integration-level L-shaped gate-control schottky barrier tunneling transistor which has the steep subthreshold slope, the good switching characteristic, the high conduction current, the reversed low leakage current and the quiescent dissipation and is suitable for serving as a deep nanoscale integrated circuit design basic unit is achieved.

The invention discloses a preparation method and system of a membrane material. The preparation method of the membrane material comprises the steps of rotating a rotating body, enabling a selected area on the surface of the rotating body to be in contact with a film-forming solution when the selected area rotates to a first position, enabling the film-forming solution to be attached to the selected area to form a liquid membrane, and enabling the liquid membrane to form a membrane material as it continues to rotate with the selected area from the first position to the second position. The controllable preparation of various membrane materials can be realized, the thickness, the area, the components, the structure and the like of the membrane materials are easy to regulate and control, the membrane preparation efficiency is high, and the obtained membrane material is good in quality, low in cost and suitable for the requirement of large-scale production, and particularly has important application value in the field of preparation of high-quality, high-performance or special-performance membranes.