33results about How to "Solving Manufacturing Challenges" patented technology

The invention belongs to the field of EBSD sample preparation, and relates to a method for preparing a metal microwire longitudinal section EBSD sample, which comprises the following steps: thermally embedding a metal microwire to obtain a thermally embedded block; the bottom of the hot inlay block is polished, and after the position traces of the metal microwires are exposed, the inlay block is cut into a plurality of hot inlay small blocks; carrying out cold inlaying on the hot inlaying small blocks by adopting thermoplastic resin to obtain first cold inlaying blocks; carrying out grinding, mechanical polishing and vibration polishing on the to-be-tested surface of the first cold mosaic block to obtain a second cold mosaic block; and heating the second cold mosaic block, and taking out the metal microfilament hot mosaic block to obtain the metal microfilament hot mosaic block. The method disclosed by the invention is relatively high in efficiency, large in effective area, low in preparation cost and wide in applicability, and is particularly suitable for metal microwires which are made of various materials and have the diameter of 100-500 microns. Therefore, the problem of preparation of the longitudinal section EBSD sample of the metal microwire is efficiently solved with high quality.

The invention discloses a method for machining steel cylinders with different plate thicknesses. The method comprises the steps that S1, parts are blanked and machined, specifically, the parts are cut through gas cutting or plasma cutting, and random spot check is conducted on site when the parts are blanked every time; s2, a cylinder pipe rolling and circle returning process which comprises the steps that S21, preparation work before cylinder rolling is conducted; step S22, rolling a cylinder; step S23, welding a longitudinal seam of the cylinder; step S24, secondary roundness correction of the cylinder; and S3, cylindrical pipe fitting assembly, specifically, S31, cylindrical pipe fitting assembly front requirements are met; step S32, carrying out a cylinder assembly construction process; s33, carrying out nondestructive testing on the cylinder welding seam; step S34, cylinder precision control; step S35, measuring the size of the cylinder; and S4, the cylinders are subjected to mark spraying treatment, and the cylinders are warehoused after being subjected to user inspection or final inspection. The manufacturing problem of large-diameter steel cylinders with different thicknesses is solved; the construction difficulty is reduced, and the manufacturing efficiency is improved.

The invention discloses a high-precision circuit board and a preparation method thereof. The preparation method comprises the following steps: acquiring a preset circuit diagram; setting a plurality of conductive layer groups according to a preset circuit diagram; wherein the conductive layers which need to form the same blind hole or buried hole form a conductive layer group, and the adjacent conductive layers which do not need to form the blind hole or buried hole form a conductive layer group; each conductive layer group comprises a core plate; placing the conductive layers in a stacked manner, placing bonding layers between the core plates in the same group or between the core plates and the conductive layers, and placing auxiliary layers between different conductive layer groups; laminating the conductive layer, the bonding layer and the auxiliary layer which are stacked, and stripping the auxiliary layer after lamination so as to enable the conductive layer group to form a sub-board; drilling a hole in a preset position of the daughter board to form a through hole; the daughter boards are placed in a stacked mode, and bonding layers are placed between the adjacent daughter boards; and laminating the sub-board and the bonding layer which are stacked. By adopting the technical scheme, the problems of alignment and warping caused by an asymmetric structure due to respective pressing of the sub-boards can be solved.

The invention provides an impeller ring sealing device of a centrifugal pump and the centrifugal pump. The impeller ring sealing device comprises a movable ring and a static ring which are arranged between an impeller ring and an impeller front cover. The distance between every two adjacent sets of static ring teeth is Bc, and the distance between the inner circumferential face of the static ring and the outer circumferential face of the movable ring is Ht. The section of the movable ring tooth is in a dry shape, and the movable ring tooth comprises a radial ring tooth extending in the radial direction, a first axial ring tooth and a second axial ring tooth, wherein the first axial ring tooth and the second axial ring tooth are perpendicular to the radial ring tooth and parallel to each other. The distance Hb between the first axial ring teeth and the second axial ring teeth ranges from 0.05 Ht to 0.35 Ht. The distance Ha between the first axial ring teeth and the outer circumferential face of the movable ring ranges from 0.05 Ht to 0.35 Ht. The tooth thickness Ba of the radial ring teeth in the axial direction ranges from 0.1 Bc to 0.4 Bc. The tooth width Hv of the first axial ring teeth and the second axial ring teeth in the radial direction ranges from 0.1 Ht to 0.2 Ht. The distance Cs between the first axial ring teeth and the static ring teeth on the two adjacent sides and the distance Cs between the second axial ring teeth and the static ring teeth on the two adjacent sides are 0.1 Bc to 0.25 Bc. The eddy-current loss in the sealing cavity is increased by adjusting the tooth structure of the moving ring, so that the leakage amount of fluid at the wear ring under the high-pressure working condition is greatly reduced.

The invention discloses a method for simultaneously and rapidly measuring the content of multiple elements in nano-diamond, which comprises the following steps: firstly, burning a nano-diamond material in an environment of 850 + / -10 DEG C in the presence of oxygen until the weight is constant, and then dissolving the obtained residue in a solution; preparing 3-5 parts of gradient series mixed standard solutions from the single-element standard solutions according to the content range of a to-be-tested sample; finally, carrying out data acquisition on the emission spectrum light intensity of the standard substance iron, silicon and calcium elements, and drawing a standard working curve of each element according to the corresponding relationship between the element content and the emission spectrum light intensity; and substituting the emission spectrum light intensity of the iron, silicon and calcium elements of the sample to be detected, which is collected by the instrument, into the standard working curve, and calculating the content of the iron, silicon and calcium elements of the sample to be detected. The method solves the problem of sample solution preparation when the nano-diamond is determined by the ICP spectrometer, the sample solution preparation process is simple, and the determination process is not interfered.

Provided is a manufacturing method of a polygonal basket arch bridge with an inserted ear plate and a tooling thereof, comprising the following steps: tooling adjustment and inspection; assembling a fixed side lower belly plate; assembling a fixed side partition plate; assembling a movable side lower belly plate; assembling a movable side partition plate; assembling a top plate and a bottom plate; assembling a left upper belly plate and a right upper belly plate; assembling an inserted ear plate; box-type welding. The present invention has a simple structure, is easy to use, has efficient positioning, is safe and reliable, has ideal versatility, and is efficient in construction. It provides a reference for the manufacture of similar steel components, solves the problem that the large linear shape of the cross section is difficult to control and the angle of the ear plate is difficult to control; and improves production efficiency, achieves certain economic benefits, has extremely high practical and promotion value, and is suitable for promotion.

The invention provides an assembling and welding process for an exhaust cylinder support with a through square hole, which comprises the following steps of: 1, decomposing the process of the exhaust cylinder support, 2, blanking and processing four parts, 3, manufacturing a welding tool, 4, assembling and welding an upper block body, a second cover plate and a lower block body, 5, secondarily assembling and welding a C-shaped support, 6, assembling and welding a first cover plate, and 7, assembling and welding a second cover plate. By means of the process, exhaust cylinder support welding deformation can be reduced, it is guaranteed that the exhaust cylinder support can meet the size after being welded to the inner barrel and the outer barrel, and all related welding seams smoothly pass MT + UT inspection. The tool design can be popularized to similar products with through square hole supporting assemblies.

The present application relates to a kind of diamond / tantalum carbide composite material and its preparation method.The diamond / tantalum carbide composite material is made of tantalum carbide continuous phase and diamond grain randomly and uniformly embedded in tantalum carbide continuous phase, wherein the size of diamond grain is nanoscale, and its volume ratio is 1~3%.The present application also discloses a kind of method for preparing the above-mentioned diamond / tantalum carbide composite material, including high temperature and high pressure treatment to tantalum carbide powder in high temperature and high pressure synthesis device.Adopting the technical scheme of the present application, tantalum carbide powder is used as raw material, and composite material made of micron or submicron size tantalum carbide and nanoscale diamond can be prepared after high temperature and high pressure treatment.Compared with traditional tantalum carbide material, the hardness of the material is significantly improved, and has broad application prospect.

The present invention provides a wiring device for variable diameter straight-through electric fusion pipe fittings, which is characterized by comprising a wiring knife, a turning knife, a rotating block, a hinge shaft, a tool holder, a numerically controlled motor, a pulling rod, a screw nut, and a guide groove. A fixing hole is provided at one end of the tool holder, and the tool holder is movably connected with the rotating block through the fixing hole, the hinge shaft, and a hinge shaft is provided at one side of the rotating block. The rotating block is movably connected with one side of the pulling rod through the hinge shaft, and the other side of the pulling rod is connected with the output shaft of the numerically controlled motor through the screw nut. The numerically controlled motor is installed on the tool holder, and two knife grooves are provided at the other side of the rotating block. A wiring knife and a turning knife are respectively installed in the guide groove. The present invention is a wiring device for variable diameter straight-through electric fusion pipe fittings. In the device, the rotating block can adjust the angle according to the inclination of the inside of the pipe fitting in the variable diameter area under the drive of the numerically controlled motor, and the rotation range is ±90°, so that the wiring knife axis is always perpendicular to the inside of the pipe fitting to be processed, and the variable diameter area is passed in a continuous wiring manner, thereby realizing one-time wiring processing.

The invention discloses a large-size boron carbide-graphene composite ceramic as well as a preparation method and application thereof. The large-size boron carbide-graphene composite ceramic has high compactness and a uniform microstructure, the size of the large-size boron carbide-graphene composite ceramic is 17-22 cm, the density of the large-size boron carbide-graphene composite ceramic is 2.502-2.518 g / cm < 3 >, the Vickers hardness of the large-size boron carbide-graphene composite ceramic is 31.5-33.8 GPa, the bending strength of the large-size boron carbide-graphene composite ceramic is 462-536 MPa, and the fracture toughness of the large-size boron carbide-graphene composite ceramic is 3.86-4.73 MPa.m < 1 / 2 >. The boron carbide-graphene composite ceramic prepared by adopting an HP and SPS dual-mode sintering mode is fine in grain, and the graphene structure is complete, so that the improvement of the mechanical property of the material is facilitated. Meanwhile, the method is simple in process, good in repeatability and high in stability, and industrial and batch stable production is easy to achieve.

The invention discloses a method for simultaneously and rapidly determining the contents of multiple elements in ferrotitanium, which comprises the following steps: firstly, selecting 3-5 ferrotitanium standard substances with known contents of silicon, manganese, phosphorus, aluminum and titanium elements to form a concentration gradient, and crushing a sample to be detected and the selected standard substances into particles of less than 40 meshes; dissolving a to-be-detected sample and the selected standard substance in the solution; carrying out data acquisition on the emission spectrum light intensity of the standard substance silicon, manganese, phosphorus, aluminum and titanium elements, drawing a standard working curve of each element according to the corresponding relationship between the element content and the emission spectrum light intensity, and substituting the emission spectrum light intensity of the silicon, manganese, phosphorus, aluminum and titanium elements of the sample to be detected, which is acquired by the instrument, into the standard working curve; and calculating the contents of silicon, manganese, phosphorus, aluminum and titanium elements in the to-be-detected sample. The method solves the problem of preparation of the sample solution when the ferrotitanium is measured by the ICP spectrograph, the preparation process of the sample solution is simple, and the measurement process is not interfered.

A method for one-step preparation of methylamine by hydrogenation amination of carbon dioxide, belonging to the field of catalysis. In a fixed-bed reactor, carbon dioxide, hydrogen, and ammonia are reacted. The catalyst comprises a microporous or mesoporous silica support, and the active component includes indium, zirconium, and at least one metal promoter selected from nickel, copper, palladium, rhodium, and platinum; the In 3d... 5 / 2 The binding energy is 444.0~444.7 eV, which is more than 0.2 eV lower than that of pure indium oxide; the single-pass conversion rate of carbon dioxide is not less than 50%, the total selectivity of methylamine is not less than 80%, and the selectivity of the byproduct carbon monoxide is not higher than 20%. This invention constructs a unique In-Zr-M active center, with In, Zr, and M uniformly co-distributed at the nanoscale. By adjusting the NH3 / CO2 ratio, the ratio of dimethylamine to trimethylamine can be controlled. The catalyst of this invention exhibits excellent performance and good stability, and has broad application prospects in the fields of carbon dioxide resource utilization and green synthesis of methylamine.

The present application relates to the technical field of filling coal mining, and particularly relates to a filling coal mining slurry bleeding rate testing and sample preparation test device and test method. The device comprises: a constraint cylinder, the side wall of which is a hollow structure; a flexible bleeding unit, which is attached to the inner side wall of the constraint cylinder; an inner lining structure, which is attached to the inner side wall of the flexible bleeding unit, and the inner lining structure is provided with a plurality of support platforms along the height direction; and a plurality of sample molds, which are arranged on the support platforms. The present application can simultaneously meet the needs of filling coal mining slurry bleeding rate testing and filling coal mining slurry standard sample preparation, effectively avoid the problems of sample height reduction and size not meeting the standards caused by water loss, accurately control the slurry form, ensure the formation of standard samples, and truly reflect the actual mechanical properties of the filling body. The sample height change before and after the slurry bleeding can be recorded in real time, and the volume of the slurry in the actual filling process can be quickly calculated.

The discrete fractal structure of the quadric surface structure is divided into a Cartesian coordinate discrete structure and a polar coordinate discrete structure according to a discrete mode, the Cartesian coordinate discrete structure and the polar coordinate discrete structure each comprise an edge support, and a suspended approximation curve structure is connected to the upper portion of the interior of each edge support. The suspended approximation curve structure is connected with a discrete polyhedron, and the discrete polyhedron is connected with a quadric surface; wherein the suspended approximation curve structure in the Cartesian coordinate discrete structure form is composed of a multi-stage approximation curve structure and an intersection approximation curve structure, and the suspended approximation curve structure in the polar coordinate discrete structure form is composed of a multi-stage approximation curve structure, a fractal unit structure and a surrounding polygon structure; the multi-stage approximation curve structure, the intersecting approximation curve structure, the fractal unit structure and the surrounding polygon structure are manufactured through a multi-stage approximation suspension 3D printing method, and efficient suspension forming of the quadric surface structure is achieved.

The invention relates to a preparation method of a composite solid-phase welding process test piece, which specifically comprises the following steps: step 1, firstly processing the welding surfaces of a titanium alloy test piece I and a titanium alloy test piece II into planes, and putting the two titanium alloy test pieces to be connected into a diffusion welding furnace to complete the preparation of a diffusion welding head; 2, the diffusion welding head prepared in the step 1 is machined to be in the size of a simulation part, linear friction welding is completed on linear friction welding equipment and a titanium alloy test block, and preparation of the diffusion welding-friction welding head is completed; the linear friction welding seam in the step and the diffusion welding seam in the step 1 are arranged in a T shape. And 3, processing the composite solid-phase welding test block into a composite solid-phase process test piece according to the design drawing. Effective fatigue test simulation of the hollow blade blisk subjected to diffusion welding and linear friction composite welding can be achieved, the feasibility of the diffusion welding and linear friction composite welding scheme is verified, the development and production requirements of products are met, and wide application prospects are achieved.

The invention provides an electron beam fuse additive manufacturing method for gradient TA15 titanium alloy, and belongs to the technical field of additive manufacturing. The problem that a traditional manufacturing process is more and more difficult to meet the machining and manufacturing requirements of TA15 parts of complex structures is solved. The method comprises the following steps that 1, a printing wire and an additive substrate are pretreated; 2, a printing program is set, a three-dimensional solid model is established based on the target TA15 titanium alloy, slicing treatment importing is conducted, and a scanning path, preheating parameters and printing process parameters are set; and 3, equipment is started, vacuumizing is conducted till the pressure reaches 9.9 * 10 <-3 > Pa, TA15 alloy printing is conducted according to the set printing parameters and programs, all layers are completed, in the step 1, an additive substrate is a TA1 substrate, the size of the substrate is 200 mm * 10 mm * 10 mm, a printing wire is a TA15 alloy wire, and the diameter of the wire is 1.6 mm. The method is mainly used for additive manufacturing of the gradient TA15 titanium alloy.

This application relates to the field of solid rocket motor technology, and particularly to a method for integrated preparation and protection of solid rocket motor propellant grains based on a functional sacrificial core mold. The method includes: designing a high-burning-rate core mold assembly and an electrothermal heating assembly according to the propellant grain structural parameters; when the propellant grain length does not exceed a preset length threshold, the core mold is integrally formed using a mold method; otherwise, it is prepared in segments and connected via flanges; the electrothermal heating assembly is attached to the outer surface of the core mold using a high-temperature resistant adhesive, and a temperature sensor is fixed thereon, then the entire assembly is installed into the combustion chamber shell; an aluminum foil gasbag is placed inside the core mold cavity and filled with inert gas to ensure it adheres to the inner wall of the core mold; fluid propellant is injected into the cavity between the core mold and the shell through an injection port, followed by electrothermal heating to achieve isothermal curing; during storage and transportation, heating is continuously controlled to maintain the propellant grain temperature and prevent performance degradation. This method achieves integrated propellant grain forming and temperature-controlled protection, effectively improving process accuracy and storage reliability.

The invention relates to the field of powder metallurgy and additive manufacturing. Specifically, the invention provides titanium carbonitride-based metal ceramic powder capable of being used for 3D printing and a preparation method of the titanium carbonitride-based metal ceramic powder. The invention further provides a binder spraying 3D printing method for preparing a titanium carbonitride-based metal ceramic formed part from the titanium carbonitride-based metal ceramic powder and the prepared titanium carbonitride-based metal ceramic formed part. The titanium carbonitride-based metal ceramic powder disclosed by the invention can be molded into a metal ceramic molded part with a complex shape and excellent mechanical properties by utilizing a binder jet printing technology. By regulating and controlling a material system and curing and sintering densification process parameters, metal ceramic materials and parts with different mechanical property intervals can be obtained so as to be matched with various properties and application requirements.

The application discloses a kind of production methods of elliptical suspension bridge steel tower fish belly type section tower section, it is related to bridge construction technical field, comprising the following steps: S1: making various parts, and the parts include outer top plate unit, inner top plate unit, outer bottom plate unit, inner bottom plate unit, outer web unit, inner web unit and baffle unit;S2: the parts in step S1 are assembled and welded, form lower block, middle block and upper block, and the lower block is box type structure, and the middle block, upper block is open channel type structure;S3: the lower block, middle block and upper block are assembled and welded, and the tower section section is made;The application solves the technical problems that fish belly type section tower section is difficult to make in the prior art.

The invention discloses a method for simultaneously determining the contents of multiple elements in a low-carbon silicon-chromium alloy, which comprises the following steps: firstly, selecting 3-5 low-carbon silicon-chromium alloy standard substances with known contents of silicon, manganese and chromium elements to form a concentration gradient, and crushing a sample to be detected and the selected standard substances into particles of less than 80 meshes; dissolving a to-be-detected sample and the selected standard substance in the solution; and then carrying out data acquisition on the emission spectrum light intensity of the standard substance silicon, manganese and chromium elements, drawing a standard working curve of each element according to the corresponding relationship between the element content and the emission spectrum light intensity, substituting the emission spectrum light intensity of the silicon, manganese and chromium elements of the sample to be detected, which is acquired by the instrument, into the standard working curve, and calculating the content of the silicon, manganese and chromium elements of the sample to be detected. The method solves the problem of sample solution preparation when the ICP spectrometer is used for determining the low-carbon silicon-chromium alloy, the sample solution preparation process is simple, and the determination process is not interfered.

A gas turbine exhaust pipe diffuser assembly welding tool and method, including an annular tensioning flange, the tensioning flange is composed of two half rings, the outer circumferential side wall of the tensioning flange is connected to a plurality of connecting plates distributed in an annular array, the connecting plate extends outward, and the end away from the tensioning flange is connected to a positioning plate; the connecting plate is in an inclined state, and when the tensioning flange is placed horizontally, the end of the connecting plate connected to the tensioning flange is lower than the end connected to the positioning plate; the front end of the positioning plate is provided with a positioning hole, and the rear end of the positioning plate is provided with a protrusion on the tensioning flange side. Also included are a hole opening template and an inspection template. Through the above structure and the method of assembling and welding the gas turbine exhaust pipe diffuser using the above tool, the assembly size of the diffuser can be guaranteed, the welding deformation can be controlled, and the gap and size of the diffuser body flange after the two halves of the gas turbine exhaust pipe are closed meet the requirements of the drawing.

The invention discloses a manufacturing process of an irregular polygonal power transmission twin-limb tower connected by inner flanges, which comprises the following steps of: split type total splicing: respectively carrying out continuous total splicing on single-limb towers on a single-limb tower total splicing jig frame to complete section manufacturing; according to the characteristics of the cross sections of the segments, the largest straight edge on the outermost side is used as a bottom edge for overall splicing manufacturing; and integral pre-assembly is conducted, specifically, the manufactured single-limb tower sections are subjected to whole-tower-type pre-assembly on a double-limb tower integral pre-assembly jig frame, and a double-limb tower is placed and pre-assembled according to the real tower position state. According to the method, the double-limb tower is reasonably segmented and blocked, the special total assembling jig frame is adopted for split type total assembling to manufacture the single-limb tower sections, and finally the double-limb tower is integrally pre-assembled on the special integral pre-assembling jig frame. Meanwhile, the irregular polygonal power transmission double-limb tower connected with the inner flanges is manufactured by setting a reasonable assembly sequence, a reasonable technological process and other measures, and the manufacturing problem of the irregular polygonal power transmission double-limb tower connected with the inner flanges is effectively solved; and the design precision is ensured.

The invention discloses a thin pulley block of a needle selection device and the needle selection device provided with the pulley block. The thin pulley block mainly comprises a support, two pulleys, a first fixing plate, a second fixing plate and a third fixing plate. The two pulleys are connected through the support, and the two pulleys are installed on the support in a freely rotating mode through the corresponding bearing assemblies. The first fixing plate, the second fixing plate and the third fixing plate are all fixed to the support, one pulley is located between the first fixing plate and the second fixing plate, and the other pulley is located between the second fixing plate and the third fixing plate. According to the design of the frame shaped like the Chinese character'wang ', under the condition that the vertical plate of the pulley block is thinned, the structural stability of the support can be enhanced, and the stress of the shaft part for bearing the pulley is changed from the stress of the end part of a cantilever beam fixed at a single end to the stress of the middle part fixed at two ends, so that the problem of'supporting' under the stress of the pulley shaft is solved; the manufacturing problem of the ultra-thin pulley block is solved.

The invention discloses a method for manufacturing a pure copper heat dissipation part through electron beam additive materials special for a new energy automobile, and a certain heat dissipation effect is achieved in the geometrical shape from the structural design of a heat dissipation part of the new energy automobile. Secondly, advanced high-heat-conductivity-coefficient pure copper is adopted, the advantages of rapid manufacturing of complex parts through electron beam additive manufacturing, high energy utilization rate and the like are utilized, and the manufacturing problem of the pure copper complex parts is solved; and finally, the advanced plasma electrolytic polishing technology is used for achieving the new energy automobile radiator component with metal luster and high precision.

This utility model discloses a socket, including a housing, an inner bracket disposed within the housing, and neutral wire conductive plates, ground wire conductive plates, live wire conductive plates, and terminals disposed within the inner bracket. The inner bracket includes a lower bracket cover, a middle bracket, and an upper bracket cover. The middle bracket is disposed between the lower bracket cover and the upper bracket cover. The neutral wire conductive plate is located between the lower bracket cover and the middle bracket. The ground wire conductive plate is located between the lower bracket cover and the upper bracket cover and on one side of the middle bracket. The live wire conductive plate is located between the upper bracket cover and the middle bracket. The terminals are disposed on the lower bracket cover. The unique layered design of the inner bracket, combined with the layout of the conductive plates, effectively separates the conductive components. The addition of a protective door assembly greatly improves electrical safety. The inclined terminal block design not only ensures the stability of the electrical connection but also optimizes the wiring operation process, making it particularly suitable for installation scenarios with limited space or special angles.

The present invention relates to a device and method for preparing a standard mixed gas using a flow meter under vacuum conditions, the device comprising: a trace gas sampling pipeline, comprising a first gas cylinder, a first valve, a second valve, a first vacuum chamber, a third valve, a first high vacuum pump unit, a first vacuum gauge and a second vacuum gauge; other gas sampling pipelines, comprising a second gas cylinder, an eleventh valve, a ninth valve, a third vacuum chamber, a tenth valve, a second high vacuum pump unit, a fifth vacuum gauge and a sixth vacuum gauge; a mixed gas pipeline, comprising a fourth valve, a standard flow conductance element, a fifth valve, a sixth valve, a second vacuum chamber, a seventh valve, an eighth valve, a twelfth valve, a third vacuum gauge and a fourth vacuum gauge; the first vacuum chamber is connected to the fourth valve, and the third vacuum chamber is connected to the seventh valve, the eighth valve and the twelfth valve. The device of the present invention is simple, low in cost and easy to operate, and can extend the lower limit of the preparation ratio of preparing a standard mixed gas to 2×10 ‑10 .

The present invention discloses a fully ceramic coated fuel and a preparation method thereof. A mixed powder is prepared by using matrix ceramic particles and dispersed fuel particles as raw materials; the mixed powder is sequentially processed by gel injection molding and sintering to obtain the fully ceramic coated fuel; in the mixed powder, the content of the dispersed fuel particles is 40 vol%-50 vol%. The present invention effectively reduces the processing amount of ceramic fuel elements through a near-net-shape forming / high-temperature sintering method, and solves the problem of preparing fuel elements with complex structures.

The invention discloses a method for simultaneously determining the contents of multiple elements in a silicon-manganese alloy, which comprises the following steps: firstly, selecting 3-5 silicon-manganese alloy standard substances with known contents of silicon, manganese and phosphorus elements to form a concentration gradient, and crushing a sample to be detected and the selected standard substances into particles of less than 120 meshes; dissolving a to-be-detected sample and the selected standard substance in the solution; and then carrying out data acquisition on the emission spectrum light intensity of the standard substance silicon, manganese and phosphorus elements, drawing a standard working curve of each element according to the corresponding relationship between the element content and the emission spectrum light intensity, substituting the emission spectrum light intensity of the silicon, manganese and phosphorus elements of a sample to be detected, which is acquired by an instrument, into the standard working curve, and calculating the content of the silicon, manganese and phosphorus elements of the sample to be detected. The method solves the problem of sample solution preparation when the silicon-manganese alloy is determined by the ICP spectrometer, the sample solution preparation process is simple, and the determination process is not interfered.

The application provides a plasma discharge structure unit based on a multi-layer mica insulating plate for air disinfection, which is symmetrical in up-down and left-right directions and in a multi-layer stacking shape; from top to bottom, the structure unit comprises a front high-voltage electrode (10), an upper layer mica plate (20), a left grounding electrode (301), a right grounding electrode (302), a high-temperature-resistant insulating adhesive layer (40), a lower layer mica plate (50) and a back high-voltage electrode (60). The working process of the structure unit is also provided. The application proposes a sandwich type discharge structure, which can solve the manufacturing problem of a complex configuration plasma discharge device.

The invention discloses a method for simultaneously and rapidly determining the contents of multiple elements in ferrovanadium, which comprises the following steps: firstly, selecting 3-5 ferrovanadium standard substances with known contents of silicon, manganese, phosphorus and vanadium to form a concentration gradient, and crushing a sample to be detected and the selected standard substances into particles of less than 60 meshes; dissolving a to-be-detected sample and the selected standard substance in the solution; carrying out data acquisition on the emission spectrum light intensity of the standard substance silicon, manganese, phosphorus and vanadium elements, drawing a standard working curve of each element according to the corresponding relationship between the element content and the emission spectrum light intensity, and substituting the emission spectrum light intensity of the silicon, manganese, phosphorus and vanadium elements of the sample to be detected, which is acquired by the instrument, into the standard working curve; and calculating the contents of silicon, manganese, phosphorus and vanadium elements in the sample to be detected. The method solves the problem of sample solution preparation when ferrovanadium is measured by the ICP spectrometer, the sample solution preparation process is simple, and the measurement process is not interfered.