2437 results about "Thin sheet" patented technology

The invention belongs to the technical field of two-dimensional materials, and particularly relates to a preparation method of a corner heterojunction. According to the preparation method, when the two-dimensional material sheet is prepared, based on the characteristics of smooth surface and high viscosity of the hydrophilic polymer layer, a large-area two-dimensional material can be stripped from the silicon substrate with the hydrophilic polymer film layer, the stripping process is clean, and the two-dimensional material is not damaged; when the corner heterojunction is prepared, an intermediate two-dimensional material or an active interface does not contact any polymer in the whole transfer process by adjusting the shape and size of a transfer medium based on a Van der Waals force pickup transfer method, so that the pollution of a heterogeneous interface is greatly reduced; the efficient and fast preparation of the Van der Waals heterostructure without polymer residues and bubbles on the interface is realized.

The invention discloses a thin-sheet motor single-phase open circuit fault-tolerant current reconstruction method for eliminating reverse magnetic potential based on a magnetic field modulation theory. A motor structure with six teeth and one pair of poles is adopted. The method comprises the following steps: firstly, according to a calculation formula of magnetic potential, writing a magnetic potential expression of residual-phase current in an air gap after single-phase open circuit; according to the obtained magnetic potential expression, extracting a reverse magnetic potential expression in the magnetic potential expression; the expression of the reverse magnetic potential is equivalent to a magnetic vector, and the magnetic vector is divided into two groups, namely ten vectors; after the phase difference between two vectors is 180 degrees, the residual phase current counteracts each other, and the remaining three vectors form an equilateral triangle to counteract each other; the five-phase current meeting the conditions simultaneously meets the condition that the reverse magnetic potential is 0, the suspension force is kept consistent with that when fault tolerance is not carried out, and suspension force pulsation does not exist. According to the invention, the defect that the reconstruction current after the traditional single-phase open circuit is applied to the slice motor is overcome, the suspension performance of the slice motor after fault tolerance is improved, and the practicability is enhanced.

The invention provides a sheet manufacturing apparatus capable of improving humidification efficiency. A sheet manufacturing apparatus (100) is provided with: a defibrating unit for defibrating a material to form fibers; a fiber accumulation unit (18) that accumulates fibers to form a second web; a pressing part for pressing the second material sheet to form a thin sheet; and a humidification mechanism (10) that supplies humidified air (E1) to the fiber accumulation unit (18), the fiber accumulation unit (18) being provided with a rotating unit that stirs the fibers supplied from the defibrating unit, a housing (3) that houses the rotating unit, and a mesh belt (191) that is provided below the housing (3) and that conveys the second web in the conveyance direction. A second web is formed on the mesh belt (191) by stacking fibers on the mesh belt (191). The humidification mechanism (10) has a downstream nozzle (602) that is provided downstream of the fiber stacking unit (18) in the conveyance direction and supplies humidified air (E1) to the fiber stacking unit (18).

The invention provides a method for preparing a high-coercivity sintered neodymium-iron-boron magnet, and belongs to the technical field of rare earth permanent magnet material preparation, and the method comprises the following steps: 1, taking the sintered neodymium-iron-boron magnet as a base material, and removing an oxide layer through alkali washing deoiling, ultrasonic water washing and acid pickling cleaning; 2, taking the Pr-Dy-Cu-Ga quaternary alloy as a diffusion source, and cutting the Pr-Dy-Cu-Ga quaternary alloy into slices; 3, attaching the thin sheet to the surface of a base material for diffusion heat treatment; fourthly, low-temperature tempering is conducted; 5, testing a room temperature demagnetization curve of the sample; light rare earth Pr replaces a part of heavy rare earth Dy and is matched with Cu and Ga elements in a certain proportion to be smelted to obtain quaternary alloy, the quaternary alloy with low heavy rare earth serves as a diffusion source, the microscopic characteristics of the magnet are improved, grain boundary phase distribution is optimized, and under the condition that residual magnetism and the maximum magnetic energy product are slightly reduced, the coercive force of the sintered neodymium-iron-boron magnet is improved; and terbium and dysprosium are not used, so that the use amount of heavy rare earth elements and the production cost are reduced.

The invention discloses a sample preparation and characterization method of a rotation angle crystal interface, which is suitable for a sample with dislocation at the interface of two crystals, and comprises the steps of sample preparation and measurement of the relative rotation angle theta of the two crystals. A certain angle is formed between the cutting direction and the interface for sample preparation, a slice is taken out, and the obtained slice has three thin areas including a top material A crystal, a top material A / bottom material B crystal mixing area and a bottom material B crystal; measurement of the rotation angle theta: the electron beam direction is parallel to the rotation axis of the top sample during testing, and the rotation angle theta is directly measured by analyzing crystallographic information of the three thin areas. According to the method, the rotation angle of the top crystal relative to the bottom crystal can be accurately measured through TEM analysis of the three thin regions, and the error-tolerant rate of TEM sample preparation and analysis experiments is improved. In addition, the sample preparation technology can be used for monitoring the change of the physical properties of the sample in mechanics, thermotics, optics, electricity and the like along with the reduction of the size of the sample from the micron level to the nano level.

The invention relates to an ultra-precision grinding and photochemical mechanical polishing combined process for a laser crystal sheet. Comprising the following steps that coarse grinding is conducted through a coarse-grained grinding wheel, rapid thinning is achieved, the depth of a subsurface damaged layer is determined, and reference is provided for the grinding wheel feeding amount in the accurate grinding stage; a fine-grained grinding wheel is adopted for accurate grinding, a damaged layer introduced in the coarse grinding stage is removed, and high surface / subsurface quality and surface precision are obtained by optimizing technological parameters; a special polishing solution for photochemical mechanical polishing is prepared from an aluminum oxide (Al2O3) grinding material, semi-fine polishing is carried out on a laser crystal sheet, and surface damage caused in the grinding stage is rapidly removed; a special polishing solution for photochemical mechanical polishing is prepared from a zirconium oxide (ZrO2) grinding material, and the laser crystal sheet is finely polished, so that the surface quality and the surface precision are further optimized; an ultrasonic cleaning instrument is adopted to clean the laser crystal slice, and a cleaning agent is absolute ethyl alcohol. According to the invention, high-surface integrity and high-efficiency processing of the laser crystal slice can be synchronously realized.

The invention relates to a multi-source error cooperative compensation method and system based on cold-rolled sheet online detection, and belongs to the technical field of error monitoring. The method comprises the following steps: acquiring multi-dimensional data of a cold-rolled sheet in real time, and processing the multi-dimensional data of the cold-rolled sheet through a deep space-time error coupling network to generate a cold-rolling error propagation chain type relation graph; establishing a cold rolling error dynamic weight distribution mechanism according to the cold rolling error propagation chain type relation graph; calculating through the cold rolling error dynamic weight distribution mechanism to obtain a rolling multi-dimensional cooperative compensation coefficient; and outputting a multi-source cold rolling error cooperative compensation amount according to the rolling multi-dimensional cooperative compensation coefficient, thereby responding to the change of working conditions in real time, automatically adjusting the rolling multi-dimensional cooperative compensation priority, and realizing multi-source error cooperative compensation.

The present invention belongs to the technical field of battery materials, and relates to a carbon nanotube-enhanced carbon-coated porous silicon / alloy composite material and its preparation. The preparation method comprises: thermally nitriding nano magnesium silicon alloy powder, and then vacuum high temperature decomposing to obtain nano porous silicon powder; dispersing the nano silicon alloy powder in a citric acid aqueous solution, dispersing the nano silicon alloy powder, surfactant and sodium hydroxide in an aqueous solution, mixing and stirring the two solutions evenly, and drying to obtain a precursor; adding the precursor to softened asphalt, stirring evenly, and then rolling into a thin sheet by a roller press, cooling, crushing, and then high temperature carbonization, ball milling, sieving; and finally chemical vapor deposition. In the obtained carbon nanotube-enhanced carbon-coated porous silicon / alloy composite material, the carbon-coated nano porous silicon and the nano silicon alloy are connected by carbon nanotubes and evenly dispersed in the carbon-coated shell; it has excellent electrochemical properties as a negative electrode material.

The invention discloses an automatic laser cutting device for sheet metal parts, and belongs to the technical field of sheet metal part cutting, the automatic laser cutting device comprises a workbench and a laser cutter arranged in the middle of the workbench, and further comprises a placing frame, a positioning roller, a fixed-distance pushing mechanism, a bearing frame, an advancing transfer mechanism, an unloading frame and an unloading mechanism; through mutual cooperation of the fixed-distance conveying mechanism, the advancing transferring mechanism and the discharging mechanism, the sheet metal part can be primarily subjected to pressing positioning, laser cutting, horizontal conveying, inclined transferring and inclined discharging treatment on the workbench; and then through the multiple cooperation effects of the fixed-distance conveying mechanism, the advancing transferring mechanism and the discharging mechanism, fixed-distance conveying and feeding, pressing, positioning and cutting, movable inclined transferring and delayed rotating discharging treatment of the sheet metal parts can be achieved, the action cohesion of laser cutting treatment is obviously improved, and the equipment operation collaboration is high.

An MIM preparation method for an ultrahigh heat-conducting composite material based on diamonds and red copper. The method comprises the preparation of a mixture, internal mixing granulation, injection molding, and degreasing sintering. By means of the MIM process, not only can uniform mixing and high-density molding of diamonds and a red copper powder be achieved, thereby effectively overcoming the technical problems of non-uniform dispersity, low density, etc. during the preparation of a high-heat-conductivity composite material by means of a traditional process, but the shape and size of a product can also be accurately controlled, particularly during the production of a sheet material having a thickness of less than 1 mm; moreover, the heat conductivity (the heat conductivity thereof being up to 500-800 W / (m·K)) thereof is significantly improved and is significantly higher than that of a traditional metal material. In addition, by optimizing MIM process parameters and selecting raw materials having higher cost effectiveness, the present invention effectively reduces the production cost, such that large-scale use of the high heat-conducting composite material based on diamonds and red copper becomes possible, thereby satisfying the high-standard requirements of high-performance electronic equipment for heat dissipation materials.

The invention discloses a hydrophobic micro-nano flexible thin film structure and a characterization method, relates to the technical field of thin film structure characterization, and aims to solve the problems of poor supporting performance of a flexible thin film and inaccurate standard data acquisition. Different acceleration voltages and currents are set for the coarse thinning stage and the fine thinning stage, fine removal of materials can be achieved, the accuracy of the thinning thickness is guaranteed, the thickness, the surface fluctuation amplitude and the microstructure feature size of a thin film in a measured image are measured with the help of a scale tool, and the measurement accuracy is improved. The morphological characteristics of the hydrophobic micro-nano flexible film can be converted into accurate data, rigid support is provided for the film by utilizing high hardness, high chemical stability and good thermal conductivity of tungsten, the upper side and the lower side of a target area are milled, hole digging is conducted on surrounding materials to form a preliminary sheet contour, then U-shaped milling and back-splashing material cleaning are conducted, and the thin film is obtained. The sample form is effectively controlled, and damage of processing stress to the sample structure is reduced.

The invention discloses an antistatic EVA foam material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The preparation method comprises the following steps: weighing 90-100 parts of EVA, 15-25 parts of an ethylene-octylene copolymer, 10-18 parts of modified graphene, 2-4 parts of a foaming agent, 0.5-1 part of a lubricant, 0.5-1 part of zinc oxide and 0.1-0.5 part of a cross-linking agent, mixing in an internal mixer, mixing in an open mill, pressing the materials into sheets, finally putting the sheets into a preheated plate vulcanizing machine mold cavity, and carrying out mold pressing foaming to obtain the antistatic EVA foaming material. The modified graphene contains a lipophilic long carbon chain and a benzene ring, so that the modified graphene has good compatibility with the remaining raw materials, and the modified graphene containing the graphene, the hindered phenol structure and the quaternary ammonium salt structure can be highly dispersed in the EVA foaming material and fully plays a role, so that the EVA foaming material disclosed by the invention has efficient and lasting antistatic performance, antibacterial performance and anti-aging performance.

A portable acoustical blocking system is disclosed for use with a support comprising a sheet of acoustical blocking material bound by material edge. A reinforcing tape is affixed to the sheet of acoustical blocking material adjacent to the material edge. A decorative component comprising a flexible substrate with a decorative image is located adjacent to the acoustical blocking material. A plurality of hangers are secured to the sheet of acoustical blocking material and extending through the reinforcing tape and the sheet of acoustical blocking material for hanging the sheet of acoustical blocking material and the decorative component from the support for inhibiting the flow of acoustic energy between the first and second sides of the acoustical blocking material.

The invention discloses a sheet high-speed assembly zero-lamination jig module which comprises an upper jig assembly, a lower jig, an automatic feeding table, a garbage bin, a sensor, an action control system, a main control host, a vacuum suction device and a blowing nozzle, and the vacuum suction device sucks a lithium battery pole piece thin material from the automatic feeding table and blows the lithium battery pole piece thin material into the garbage bin. And the sensor is a thickness detection sensor, the blowing nozzle is aligned with the pole piece thin material, and when the thickness is abnormal, the blowing nozzle is driven to blow away the thin material with the abnormal thickness, and the thin material with the abnormal thickness is collected by the garbage bin. The device is novel in design and simple and compact in structure, the questionnaire efficiently meets the zero lamination technical requirement of high-speed automatic assembly of sheets, efficient stripping of natural laminations of sheet parts is achieved, efficient expelling of non-natural laminations of the sheet parts is achieved, and efficient collection of stripped sheets, laminated sheets and waste is achieved.

The utility model discloses a disposable drainage bag which comprises a first bag body, and the first bag body comprises a liquid storage bag with a bag connecting end and a drainage bag connector fixedly connected with the bag connecting end; the bag connecting end is provided with oppositely connected bag opening film layers; the drainage bag connector is provided with a body tube and a wing structure integrally arranged on the outer side wall of the body tube. One end of the body pipe and the wing structure are welded between the bag opening film layers, and the wing structure is flatly laid between the two bag opening film layers; the wing structure comprises connecting sheets symmetrically distributed on the two sides of the body pipe. The bag connecting end is provided with more than two welding seam strips for oppositely welding the bag opening film layers; the connecting sheet at least continuously extends from one weld strip to another weld strip.

A keyboard membrane, which is a thin sheet molded object thermoformed by a thermoplastic wear-resistant molding membrane, comprising a plurality of concave-convex parts, the concave-convex part comprises a plurality of upwardly protruding pressing parts, each of the pressing parts has a top wall and a peripheral wall extending downward from a periphery of the top wall; the keyboard membrane is disposed on a key module with keys; each of the pressing parts is connected with one of the keys of the key module; a periphery of the keyboard membrane has a peripheral edge extending outward from the pressing part, and the peripheral edge wraps the key module to form a waterproof and dustproof keyboard.

The invention relates to a thin film sheet separating device. According to the thin film separating device, a guide hole is formed in a shell assembly in the jacking direction; the number of the jacking blocks is at least two, the jacking blocks are sleeved with each other in a sliding mode, each jacking block comprises a jacking part and a sliding part, the jacking parts are arranged in the guide holes in a sliding mode, the sliding parts are provided with sliding grooves, the sliding grooves are provided with a same rolling shaft in a penetrating mode, the rolling shaft is arranged on the sliding seat, the sliding grooves are provided with inclined sections which are not overlapped, and the inclined sections are arranged on the sliding seat. When the rolling shafts move on the inclined sections, the corresponding jacking blocks are driven to move in the jacking direction; the driving assembly drives the sliding base to slide through the push rod, and then the rolling shaft is driven to slide along the sliding groove. The thin film separating device has the advantages of being simple and compact in structure, high in flexibility and not prone to being stuck.

The utility model relates to the technical field of strip-shaped sheet material processing equipment, in particular to an adhesive splicing device. The utility model provides a glue splicing device. The glue splicing device comprises a splicing mounting plate, a first splicing assembly, a second splicing assembly, a knife rest assembly and a paper head traction assembly. Materials needing to be spliced are placed between the first splicing assembly and the knife rest assembly, the blade is adjusted to the horizontal position, the glue suction plate adsorbs a glue sheet and adjusts the glue sheet to be parallel to the connecting plate, and a paper head of a new material is connected to the paper head traction assembly. Under the action of external force, the first splicing assembly moves towards the second splicing assembly, and the negative pressure plate firstly makes contact with the old materials and adsorbs the old materials; then the blade enters the groove of the connecting plate, the blade plate and the blade are matched to cut off the new material and the old material at the same time, and the head section of the new material is dragged away; and finally, the blade plate and the negative pressure plate are close to the rubber suction plate, the upper end of the new material and the lower end of the old material are extruded on the rubber sheet adsorbed by the rubber suction plate, and splicing of the new material and the old material is achieved.

The invention relates to the technical field of silicon carbide wafer processing, and specifically to a low-loss silicon carbide wafer slicing method. The invention comprises the following steps: S1, taking a silicon carbide crystal ingot with a thickness of 3.5-6 cm, and cutting it into a silicon carbide crystal column with a thickness of 825-4000 μm by laser cutting; S2, using laser invisible cutting to form cracks on the silicon carbide crystal column obtained in step S1, forming a silicon carbide thin slice with a thickness of 80-200 μm and a silicon carbide thick slice with a thickness of 625-3920 μm on the silicon carbide crystal column, and then applying an adhesive on the silicon carbide thin slice. During slicing, only grinding loss is generated each time, and the loss generated when slicing silicon carbide is smaller. For each 1000 μm silicon carbide crystal column, 6 silicon carbide thin slices can be separated, which can not only separate more silicon carbide thin slices than the traditional multi-wire cutting technology, but also generate less loss, thereby effectively reducing the processing cost of the silicon carbide wafer.

The invention discloses a silicon carbide / graphene composite material and a preparation method thereof, the composite material is of a three-dimensional network structure generated through in-situ reaction of multilayer graphene and silicon powder, silicon carbide nanowires in the structure are distributed on graphene sheets, the length of the silicon carbide nanowires is 1-5 microns, the diameter of the silicon carbide nanowires is 50-100 nm, and the silicon carbide nanowires are in a beta-SiC crystal form. The material is prepared through a carbon thermal reduction method, specifically, silicon carbide nanowires grow on the surface of graphene in situ, so that electromagnetic parameters and impedance matching characteristics of the material are optimized. The prepared composite material has the characteristics of light weight, high specific surface area, good dielectric loss and the like, and shows good broadband wave-absorbing performance in the frequency band of 2-18 GHz, the minimum reflection loss can reach-23.535 dB, and the effective absorption bandwidth reaches 1.498 GHz. The method is simple in process, low in energy consumption and suitable for large-scale production, and has wide application prospects in the fields of stealth technology, electromagnetic shielding and the like.

The invention relates to the technical field of heat-conducting materials, in particular to a heat-conducting silica gel sheet and a preparation process thereof, and the heat-conducting silica gel sheet is prepared from the following components in parts by weight: 100 parts of organic silicon rubber; 300-500 parts of a heat conducting filler; 3-8 parts of a curing agent; 1-3 parts of a catalyst; according to the invention, a composite system of silicon carbide particles with a specific crystal structure, surface-modified graphene sheets and nano-diamond particles is used as a heat-conducting filler, and the filler is subjected to accurate proportioning and surface treatment, so that not only is the heat-conducting efficiency greatly improved, but also the internal binding force and heat stability of the material are effectively enhanced; compared with a traditional heat-conducting silica gel sheet, the heat-conducting silica gel sheet can more effectively transfer heat and reduce thermal resistance under the same condition, so that the heat dissipation performance and operation reliability of electronic equipment are improved, and in addition, the heat-conducting silica gel sheet has good mechanical performance and machinability and is easy to adapt to various complex application scenes.

The present application discloses a shielding plate, a thin sheet body, a female terminal connector and a connector assembly, relating to the technical field of connectors. The shielding plate provided by the present application has: an inner shielding surface and an outer shielding surface which are oppositely arranged; a plurality of isolation channels, where the plurality of isolation channels are located on the shielding plate or on one side of the inner shielding surface. Among them, a fixing part is arranged on the isolation channel, and the fixing part is one of a tenon and a mortise, used to enable the isolation channel to be tenon-mortise connected with a grounding end in the connector. The shielding plate of the present application is used to realize the grounding function of the grounding end.

The device for handling adjacent sheet elements comprises a clamp (2) for gripping a sheet element (10) and a capture head (1) which is provided with clamping means (4), which separates, grips and lifts an edge of a sheet element (10). The capture head / s (1) is / are rotatable about a longitudinal axis (3).It allows the handling of sheet elements consisting of one or more layers of sheet material, allowing the clamp to slide along the surface supporting the elements to access the underside of the sheet element, thus capturing the elements on the same surface that has been used to cut them.

The invention discloses a stamping die for metal sheet forming and a machine tool comprising the stamping die, and relates to the technical field of metal sheet machining. Comprising an upper die base and a lower die base, a plurality of guide columns are evenly distributed on the lower die base, a plurality of through holes corresponding to the guide columns are formed in the upper die base, guide sleeves are arranged in the through holes, the guide columns are arranged in the guide sleeves in a sleeved mode and connected with the guide sleeves in a sliding mode, a female die is arranged on the top of the lower die base, a positioning groove is formed in the top of the female die, and a plurality of fixing holes are evenly distributed in the bottom of the positioning groove. A plurality of air channels corresponding to the fixing holes are formed in the female die, and the fixing holes are communicated with an air pump through the air channels. A male die corresponding to the female die is arranged at the bottom of the upper die base, and a die handle is arranged at the top of the upper die base. The air channel communicating with the positioning groove is formed in the bottom of the positioning groove, negative pressure is formed in the air channel through the air pump, adsorption force on the metal sheet is generated, the metal sheet is adsorbed to the bottom of the positioning groove, displacement of the metal sheet during machining is avoided, and the machining quality is guaranteed.

A keyboard membrane, which is a thin sheet molded object thermoformed by a thermoplastic wear-resistant molding membrane, comprising a plurality of concave-convex parts, the concave-convex part comprises a plurality of upwardly protruding pressing parts, each of the pressing parts has a top wall and a peripheral wall extending downward from a periphery of the top wall; the keyboard membrane is disposed on a key module with keys; each of the pressing parts is connected with one of the keys of the key module; a periphery of the keyboard membrane has a peripheral edge extending outward from the pressing part, and the peripheral edge wraps the key module to form a waterproof and dustproof keyboard.

A connected-DRA array including: a plurality of DRAs each having at least one volume of non-gaseous dielectric material; each of the plurality of DRAs having a proximal end and a distal end, and an overall height, H, from the proximal end to the distal end; wherein each of the plurality of DRAs is physically connected to at least one other of the plurality of DRAs via a relatively thin connecting structure being relatively thin as compared to an overall outside dimension of one of the plurality of DRAs, each connecting structure having a cross sectional overall height, h, as observed in the elevation view of the connected-DRA array, that is less than the overall height, H, of a respective connected DRA and being formed of a thin sheet of the at least one volume of non-gaseous dielectric material; wherein the thin sheet extends over a substantial portion of the connected-DRA array as observed in a plan view of the connected-DRA array.

The invention belongs to the technical field of high polymer material processing, and particularly relates to a melt extrusion molding method of an ultra-high molecular weight polyethylene wide sheet. Aiming at the technical bottlenecks of poor melt flowability, extrusion fracture and the like caused by molecular chain entanglement of UHMWPE, continuous and stable extrusion of UHMWPE wide sheets is realized by compounding a specific flow modifier and combining a stepped precise temperature control strategy and a forced symmetric cooling process. According to the method, the melt fracture phenomenon is eliminated, the intrinsic performance such as high wear resistance and low temperature resistance of UHMWPE is completely reserved, the efficiency and size limitation of a traditional mold pressing process is broken through, and a large-scale production solution of high-performance sheets is provided for the high-end fields such as food machinery and medical implants.

The invention relates to the technical field of heat insulation pad production equipment, in particular to a sheet type medium thickness measuring device which comprises a stock bin mechanism, a feeding mechanism, a conveying mechanism, a thickness measuring mechanism, a discharging mechanism and a discharging mechanism. The thickness measuring mechanism can measure the thickness of a plurality of workpieces conveyed on the conveying mechanism at the same time, the stock bin mechanism comprises at least two storage chambers, the feeding mechanism comprises at least two feeding grabbing pieces, and the feeding mechanism can transfer the workpieces to the conveying mechanism at a time so as to adapt to the thickness measuring speed of the thickness measuring mechanism. The discharging mechanism is provided with at least two discharging subareas, the discharging subareas are used for containing workpieces in different thickness ranges, the discharging mechanism transfers the workpieces to the discharging subareas in the corresponding thickness ranges according to the measurement result of the thickness measuring mechanism on each workpiece, and the workpieces are distinguished. According to the invention, the problems that an existing slice type medium thickness measuring device is low in productivity and cannot discharge materials in different areas according to the thickness of a measured product and the like are solved.

[Problem] To provide: a graphite flake laminate that exhibits a high heat conductivity and can be used as a sheet-like heat conduction member; and a production method with which it is possible to produce the graphite flake laminate by using a safe and simple production facility. [Solution] Provided is a graphite flake laminate in which a large number of graphite flakes are laminated, wherein the porosity in a cross section in the lamination direction is 20.0% or less, and the median value of the aspect ratios of gaps present between the graphite flakes is 6.5 or more. This material is used as a heat conduction member for a heat dissipation structure or the like. The laminate can be produced by a method in which a specific acid is added to a liquid dispersion in which a carbon material comprising aggregates of graphene, and a carbonate salt or a hydrogencarbonate salt are dispersed in a dispersion medium.