300results about How to "Solve cracking" patented technology

The invention discloses a high-quality formed ginkgo wood furniture manufacturing and processing technology, and relates to the technical field of furniture production, and the high-quality formed ginkgo wood furniture manufacturing and processing technology comprises ginkgo wood selection, ginkgo wood treatment, wood modification, part processing and surface treatment. Before drying, the cut ginkgo biloba boards are subjected to primary treatment, surface impurities are removed, and primary balance treatment is carried out, so that stress concentration in the later drying process is reduced; primarily drying the primarily treated wood, adjusting the thickness and the drying temperature and humidity of the wood, adjusting the temperature in the drying chamber according to the thickness and the initial water content of the wood by using a combined drying technology, and controlling the distance between the wood to be 1 / 10-1 / 8 of the width of the wood through a circulating air drying system. By means of the combined drying technology, dynamic control over the ginkgo wood drying quality is achieved, the problems that the drying process is complex and wood is prone to warping or cracking during drying are solved, the drying period is shortened, wood deformation and cracking are reduced, the physical performance of the wood is improved, and the drying efficiency is improved.

The invention discloses a crack control method for tunnel molded lining concrete. The crack control method comprises the following steps that a temperature stress simulation finite element calculation model is established according to the size of a tunnel lining structure; analyzing lining concrete cracking risk coefficients corresponding to different working condition parameter optimization combinations through a temperature stress simulation finite element calculation model; the anti-crack concrete is prepared by uniformly mixing and stirring the hydration temperature rise inhibitor, the calcium-magnesium composite expanding agent, the mineral admixture, the cement, the gravel and the water according to a certain proportion. After construction of the tunnel inverted arch and the inverted arch filling layer is completed, the mold entering temperature in the working condition parameters is adjusted and controlled, and the prepared anti-crack concrete is poured on the inverted arch at a time to form a lining concrete layer; and after anti-crack concrete pouring is completed, formwork removal and moisturizing maintenance after formwork removal are conducted according to the formwork removal time representing the formwork removal maintenance technology and the parameter requirements for maintenance after formwork removal.

The invention provides a display panel and a display device. The display panel comprises a substrate, a packaging layer and a touch control layer, wherein the packaging layer and the touch control layer are sequentially arranged on the substrate in a stacked mode; the substrate comprises a hole opening area and an isolation area surrounding the hole opening area; the touch layer is provided with at least one slot, the slot is located in the isolation area, the slot extends from the surface, away from the substrate, of the touch layer to the direction of the substrate, and the slot penetrates to the surface, away from the substrate, of the packaging layer to the maximum extent. According to the display panel, the structure of the touch layer of the isolation area is not continuous, stress is dispersed, stress concentration is avoided, then the problem that in the manufacturing process of the display panel, due to stress concentration, a film layer is peeled off or cracks appear is solved to a certain extent, the display effect of the display panel is guaranteed, and the display effect of the display panel is improved. And the yield and the product competitiveness of the display panel are improved.

The utility model provides a novel structure trunnion and grinding roller device, which comprises a grinding roller head and two trunnions respectively arranged on two sides of the grinding roller head, a connecting sleeve is arranged on each grinding roller head, and the trunnions are inserted into the connecting sleeves; in other words, the grinding roller head and the trunnion adopt a socket and spigot type flexible connection structure, so that the bearing capacity requirement of the trunnion and the grinding roller head in the operation working state is met, and the problems that the joint of the grinding roller head and the trunnion is cracked and a bolt is easy to break in the prior art are thoroughly solved; the trunnion and the grinding roller head can be directly mounted and used and can be universally exchanged with other parts, so that the requirements on safety performance and economic performance are met; the bushing is arranged between the trunnion and the grinding roller head to serve as a damping structure, and the bushing is made of a high-temperature-resistant and wear-resistant flexible material, so that the grinding roller head and the trunnion are connected more stably, the matching degree is higher, and the service life is greatly prolonged; even, the service life of the product can be greatly prolonged, the replacement period of spare parts of the coal mill is greatly prolonged, and the operation and maintenance cost of the coal mill can be obviously reduced.

The invention discloses a casting cylinder body preparation method. The casting cylinder body preparation method comprises the following steps that 1, the bottom of a plunger hole in a cylinder body is sealed; 2, the copper alloy and the casting cylinder body are sintered; step 3, cooling the cast cylinder body; according to the method, through a segmented cooling mode, casting defects such as shrinkage porosity and shrinkage cavities are avoided, copper-steel bimetal metallurgy diffusion bonding is achieved, it is guaranteed that a copper alloy layer has good mechanical and tribological properties, and therefore the service life of the copper-steel bimetal cylinder body is prolonged.

The invention relates to a high-performance concrete and reinforcement intensive concrete prestressed ring beam construction method. The high-performance concrete and reinforcement intensive concrete prestressed ring beam comprises the following components by weight: 280kg of cement, 80kg of fly ash, 48kg of mineral powder, 38kg of an anti-cracking agent, 24kg of a viscosity reducer, 710kg of natural sand, 1065kg of gravel, 7.99 kg of a water reducing agent, 150kg of water and 0.235 kg of cellulose ether. The problem that when the distance between the steel bars is too dense, it can be guaranteed that the difference between the internal temperature and the surface temperature is not large without additionally arranging cooling water pipes, and therefore it is guaranteed that cracking of concrete is effectively controlled is solved.

The present invention discloses a concrete formwork with the functions of cooling by water and preventing cracks, and relates to the technical field of water conservancy and civil engineering, including a concrete formwork mechanism for forming a slope protection, a driving mechanism for providing power, a water-blocking mechanism for separating a river channel, a reciprocating mechanism for transmitting power, and a cleaning mechanism for cleaning underwater impurities in the slope protection. After the concrete formwork forms a river channel slope protection, the design of a water pump, a water suction pipe, and a water injection pipe in conjunction with an internal water trough and an overflow trough to replenish water on the surface of the second concrete slab effectively solves the problem of cracking of the concrete formwork in the river channel slope protection due to exposure to the sun, and improves the service life and use effect of the concrete formwork in the river channel slope protection application. At the same time, in daily conditions, the bottom of the water-blocking plate is close to the water level of the river channel, and its body will shield the second concrete slab, playing a role in shielding sunlight, and slowing down the cracking phenomenon caused by the lack of water in the part of the concrete formwork exposed above the water level.

The utility model belongs to the field of vehicle sheet metal part forming and manufacturing, and provides a novel steel plate negative angle bending die which comprises an upper die plate (1), a lower die plate (9), a male die (4), a fixed female die (10) and a movable female die (11), the upper portion of the male die (4) is T-shaped and clamped into a space formed by two male die fixing plates (5), the section of the lower portion of the male die (4) is provided with two round corners, and the lower portion of the male die (4) is provided with two round corners. The fixed female die (10) is provided with two movable female dies (11), each movable female die (11) is in a notch disc shape, the movable female dies (11) are embedded into the fixed female die (10), the bottom of the male die (4) can be embedded into notches in the movable female dies (11), and a gap between the lower portion of the male die (4) and the inner walls of the notches of the movable female dies (11) can accommodate the thickness of a steel plate. According to the utility model, one set of die can complete two processes of production; the production efficiency of products is effectively improved, the material size can be effectively guaranteed, and the problems of springback and cracks are solved.

The invention provides a high-strength anti-cracking high-magnesium aluminum alloy welding wire. The welding wire comprises the following components in percentage by weight: 0.5-0.8% of Mn, 5.8-6.8% of Mg, 0.02-0.10% of Ti, 0.08-0.15% of Zr, 0.16-0.30% of La, impurity elements including less than or equal to 0.40% of Si, less than or equal to 0.40% of Fe, less than or equal to 0.10% of Cu, less than or equal to 0.20% of Zn, less than or equal to 0.0003% of Be and the balance of Al. According to the welding wire, trace Zr and La elements are added, and the adding proportion of Zr, La and Ti is controlled, so that when the welding wire is used for welding a high-strength aluminum alloy plate, the mechanical property of a welding seam is remarkably improved. When the welding wire is used for welding a high-strength aluminum alloy plate, the heat affected zone range of a welding seam is effectively reduced, and the thermal cracking phenomenon of the welding seam disappears.

The seamless semi-prefabricated court comprises a prefabricated court main body, the prefabricated court main body comprises a seamless surface layer, a second surface layer, a first surface layer, an adhesion agent layer, a prefabricated court layer, a bonding layer, a second middle layer, a first middle layer, a primer layer and a base layer, and the top of the base layer is fixedly connected with the bottom of the primer layer. According to the seamless semi-prefabricated court, the convex rhombus clamping grooves and the convex rhombus clamping blocks are arranged on the seamless semi-prefabricated court, the connectivity of equipment is enhanced through the convex rhombus clamping grooves and the convex rhombus clamping blocks, and therefore the seamless semi-prefabricated court has the advantages that the equipment is not prone to falling off, the service life of the equipment is prolonged, the service life of the equipment is prolonged, and the service life of the equipment is prolonged. The prefabricated court layer can be made of coiled materials or sheets in a factory, and is transported to a construction site for pavement, so that the construction time is shortened, the thickness uniformity of the seamless semi-prefabricated court is facilitated, the problem of thermal expansion and cold contraction of rubber is solved by using the coiled materials or the sheets, and the problem of cracking of the seamless semi-prefabricated court is solved.

The invention discloses a preparation method of an SOFC (solid oxide fuel cell) half cell, which comprises the following steps: mixing NiO powder and YSZ powder, mixing with a pore forming agent and absolute ethyl alcohol, ball-milling to be uniform, drying, adding a first binder, and ball-milling to be uniform to obtain anode support body powder; extruding the anode support body powder into an anode support body green body, and sintering the anode support body green body in an air atmosphere to obtain an anode support body; preparing anode slurry and electrolyte slurry; coating anode slurry on the anode support body, and drying to form an anode functional layer blank layer; coating electrolyte slurry on the surface of the anode functional layer, and drying to form an electrolyte blank layer so as to obtain an SOFC half-cell biscuit; and sintering the SOFC half-cell biscuit in a stepped heating mode, and cooling to room temperature to obtain the SOFC half-cell. According to the preparation method, the process steps are optimized, and the time cost and the electric power cost are greatly saved.

The invention discloses a welding material for preparing an aluminum-steel gradient structure. The welding material comprises alloy powder for laser cladding and an aluminum-based welding wire for CMT welding. The alloy powder for laser cladding comprises the following components in percentage by mass: 20.0%-30.0% of Zn powder, 20.0%-30.0% of Cu powder, 5.0%-10.0% of Si powder, 5.0%-10.0% of Sn powder and the balance of Al, the aluminum-based welding wire for CMT welding comprises powder and a welding skin, and the powder comprises, by mass, 20.0%-30.0% of Zn powder, 20.0%-30.0% of Ag powder, 10.0%-20.0% of Cu powder, 5.0%-10.0% of Si powder, 5.0%-9.0% of Mg powder and the balance Al powder. The structure solves the problems of cracking and poor performance caused by mismatching of thermal physical properties and brittle phases of an aluminum-steel dissimilar structure. The invention further provides a laser and CMT composite preparation method of the aluminum-steel gradient structure.

The invention relates to the technical field of chip packaging, in particular to an LED chip packaging production line and a production process thereof. The double-track conveying line is sequentially provided with a feeding device used for sequentially sorting and conveying single substrates to the double-track conveying line, and a crystal fixing device used for dispensing elargol at specific positions of the substrates and installing crystals at dispensing positions of the substrates in the conveying direction of the double-track conveying line. The heating device is used for carrying out backflow heating curing on the solder paste; and the glue sealing device is used for carrying out glue pouring protection on the LED chip. According to the method, the common problems of elargol aging, chip offset, flow soldering pseudo soldering, colloid cracking, colloid residue and the like in traditional packaging are solved, and the problem of colloid cracking caused by reflow soldering pseudo soldering and insufficient soldering in the traditional LED packaging process is solved by optimizing a temperature control curve in a reflow soldering process; and the packaging quality and the production efficiency are greatly improved.

The invention discloses diamond wire outer circle machining equipment, and belongs to the technical field of diamond wire cutting machining. The linear moving device comprises a moving platform, a moving driving source, a screw rod driving part, a guide wheel part and a protective cover; the rotating device is used for providing rotating power for the processed material; the vacuum chuck is used for adsorbing and fixing the processed material in vacuum; the diamond wire cutting device comprises a tensioning reel, a driving reel, a plurality of groups of driven reels and a diamond wire; after machining, the semiconductor crystal blank is divided into the machined crystal with the standard size on the inner side and the redundant crystal circular ring waste on the outer side, so that the workload of grinding machining and the abrasion consumption of a grinding wheel are greatly reduced, the production cost is reduced, meanwhile, the problem that in the prior art, part of crystals crack in the machining process is effectively solved, and the machining quality is improved. And the economical efficiency is improved.

The invention discloses an etching solution and a preparation method and an etching method thereof, and belongs to the technical field of microelectronics and display panel manufacturing. The etching liquid comprises the following components in percentage by mass: 50-70% of phosphoric acid, 5-30% of acetic acid, 5-15% of nitric acid, 0.1-0.5% of a water-soluble polymer, 0.05-0.3% of a boron-containing compound, 0.05-0.5% of an etching control agent and the balance of water. The water-soluble polymer is selected from one or more of water-soluble polymers containing a hydroxyl group, an amide group, an ether bond or a pyrrolidone group. The etching solution contains a specific water-soluble polymer, a protective layer can be formed on the surface of the photoresist, attack of high-concentration acid to the etching solution is effectively inhibited, and the cracking problem is avoided; meanwhile, through the synergistic effect of the boron-containing compound and the azole etching control agent, the etching rate, the slope angle and the key size loss can be accurately controlled, and therefore the excellent etching morphology meeting the requirement is obtained.

The invention discloses a nickel-based powder high-temperature alloy bar extrusion structure which comprises an end cover, a powder high-temperature alloy ingot and a base, the powder high-temperature alloy ingot is located between the end cover and the base, the end cover is of a rotary body, the upper portion of the rotary body is of a chamfering structure, the lower portion of the rotary body is of a cylindrical structure, and an end cover through hole is formed in the center of the rotary body. An end cover through hole is formed in the middle of the end cover, and the diameter of the end cover through hole is 50-120mm; the assembling positions of the end cover and the powder high-temperature alloy ingot are connected in a segmented welding mode in the circumferential direction, and the welding positions are wrapped with high-temperature-resistant fiber blankets. The invention further discloses an extrusion method of the nickel-based powder high-temperature alloy bar extrusion structure. The technical problem that the surface of the powder high-temperature alloy bar cracks is solved, and the utilization rate of the powder alloy bar is increased.

The invention discloses a heat preservation and structure integrated building outer wall waterproof upward-moving structure, and relates to the technical field of building engineering. The heat preservation and structure integrated building outer wall waterproof upward-returning structure comprises waterproof coiled materials which are laid on the outer side face of an underground wall body structure and the outer side face, located below a cornice, of an overground wall body structure and laid on the bottom face, the outer side face and the top face of the cornice, and a coiled material head retracting structure of the waterproof coiled materials is located on the top face of the cornice; the first heat preservation layer is arranged between the waterproof coiled material and the heat preservation composite board and is arranged on the outer side face of the cornice; and the second thermal insulation layer is arranged on the outer side surface of the waterproof coiled material between the cornice and the underground wall body structure. The laying height of the waterproof coiled material is changed by adjusting the arrangement position of the cornice on the overground wall structure, and the waterproof coiled material can be directly connected with the wall structure, so that the bonding effect of a waterproof layer and the wall structure in the heat preservation and structure integration building outer wall is improved.

The invention discloses an assembly type FRP profile-concrete continuous composite beam which is mainly composed of an FRP profile main beam, a sagging moment area prefabricated concrete slab and a hogging moment area prefabricated laminated slab. Wherein the upper part of the hogging moment area prefabricated laminated plate is a large-strain FRP grid reinforced EGC top plate, the lower part of the hogging moment area prefabricated laminated plate is an FRP rib reinforced concrete bottom plate, and shear-resistant short steel bars are vertically arranged on the two; the beam sections of the FRP profile main beam are connected through FRP lap joint plates, U-shaped formwork-free comb-tooth-shaped wet joints are arranged between the plates, and the FRP profile main beam is connected with the upper prefabricated concrete slab and the laminated slab through detachable high-strength bolts. According to the structure, the characteristics of ultrahigh ductility, multi-seam steady-state cracking and higher tensile strength of a large-strain FRP grid reinforced EGC material are fully utilized, and meanwhile, the advantages of light dead weight, high strength and high elasticity of an FRP profile and the advantages of large rigidity, good stability, low construction cost and the like of a concrete wing plate are exerted; and the reliable and durable assembly type functional gradient composite beam is formed.

The invention belongs to the field of wave-absorbing materials, and particularly relates to a preparation method and application of an aluminum oxide doped high-temperature radar wave-absorbing coating. According to the method for modifying the CBS microcrystalline glass through aluminum oxide doping, the problem of coating cracking caused by volume shrinkage due to crystallization in the heat treatment process of a CBS-based wave-absorbing coating prepared through traditional atmosphere plasma spraying is solved, the compactness of the coating is further improved, oxidation of a Fe-based magnetic absorbent in a high-temperature environment is prevented, and the service life of the wave-absorbing coating is prolonged. The high-temperature stability of the coating is improved, and the aluminum oxide raw material is convenient to obtain; the preparation method provided by the invention is simple in process and easy for industrial production, has the advantages of lower density, wider radar absorption frequency band, strong oxidation resistance and the like compared with a coating of the same type, and can be stably used in a 700 DEG C environment.

The invention discloses a chip solid electrolyte tantalum capacitor capable of ensuring moisture resistance and a preparation method thereof, and belongs to the field of capacitor preparation. The tantalum capacitor comprises a tantalum anode, a dielectric layer, a solid electrolyte layer, a graphite silver paste layer, a hydrophobic moisture-proof layer, an epoxy resin shell, a lead frame, a positive lead and a negative lead. Wherein the tantalum anode is sequentially coated with the dielectric layer, the solid electrolyte layer and the graphite silver paste layer from inside to outside; the graphite silver paste layer is adhered to the lead frame through a conductive adhesive to lead out an anode lead and a cathode lead; the graphite silver paste layer is coated with a hydrophobic moisture-proof layer; and the hydrophobic moisture-proof layer is coated and packaged with an epoxy resin shell. According to the tantalum capacitor, the graphite silver paste layer is coated with the specific hydrophobic moisture-proof layer, so that the moisture-proof performance of the chip-type solid electrolyte tantalum capacitor is effectively improved on the premise that the preparation process difficulty, cost and finished product volume are not increased, and the chip-type solid electrolyte tantalum capacitor is suitable for being used in a high-temperature and high-humidity environment; and the product performance is ensured.

The invention discloses an autoclaved aerated concrete material and a preparation method thereof, and belongs to the technical field of novel building materials. The graphene oxide loaded calcium carbonate and the graphene oxide are added into the material provided by the invention, nucleation sites generated by the graphene oxide loaded calcium carbonate cause a deep microstructure of the material to directionally generate a fiber-like nanoneedle-shaped multi-stage micro-nano structure, and nanowires are split from tips of the nanoneedle-shaped structure and are filled in capillary pores and microscopic pores, so that the nanowires are uniformly dispersed in the micro-pores and the micro-pores; the appearance of a meniscus is effectively avoided, the compactness is increased, the pressure of capillary pores can be further dispersed by the nanowires, and the pressure difference of the capillary pores is reduced, so that drying shrinkage is avoided. The graphene oxide ions can reduce the gravitation between the colloidal particles and block the distance between the particles, so that drying shrinkage is further avoided. Therefore, the material provided by the invention can effectively solve the cracking problem caused by drying shrinkage, the durability of the material is improved, and the service life of the material is prolonged.

The invention provides a high-compression-resilience skin-core composite fiber and a preparation method thereof, and relates to a composite fiber which is prepared by synthesizing novel copolyester and then utilizing a skin-core composite spinning method and has an excellent compression resilience rate. A step-by-step esterification method and a copolycondensation method are adopted to prepare copolyester A with three chain segment structures as a skin layer, and the melting point is 125-140 DEG C; copolyester B with two chain segment structures is prepared through a co-esterification and co-polycondensation method to serve as a core layer, the core layer and a skin layer are equivalent in fluidity at the same temperature, the melt index is 20-30 g / 10 min, the composite fiber with the excellent compression rebound rate is prepared through skin-core composite spinning, the mechanical strength of the fiber is larger than or equal to 2.5 cN / dtex, the compression rebound rate is larger than or equal to 85%, and the composite fiber is soft, skin-friendly and comfortable and can be used for preparing the composite fiber with the excellent compression rebound rate. And the hot air molding processing requirement can be met, and the hot air molding material can be widely applied to products such as diapers and sanitary napkins.

The invention discloses a gradient-thickness electrode for a lithium ion battery as well as a preparation method and application of the gradient-thickness electrode, and belongs to the field of lithium ion batteries. The method comprises the following steps that S1, slurry A, slurry B and slurry C are prepared respectively, and in the slurry A, the slurry B and the slurry C, the contents of active substances are slurry Alt in sequence from low to high; a slurry Blt; the contents of the slurry C and the conductive agent are sequentially slurry Clt from low to high; a slurry Blt; slurry A; s2, coating a current collector with the slurry A, coating the current collector with the slurry B after drying and curing, coating the current collector with the slurry C after drying and curing, and drying and flaking to obtain the gradient thick electrode. By controlling the content of the active material and the conductive agent in each layer of slurry, the electrode close to the current collector side in the electrode material is rich in the conductive agent, the electrode far away from the current collector side is rich in the active substance, the conductive agent and the active substance are in gradient distribution in the electrode material, and the electrochemical performance and the mechanical stability of the electrode material are improved.

The invention discloses a design and preparation method of an alumina ceramic insulating part for vacuum, which belongs to the technical field of design and preparation of ceramic insulating parts, and comprises the following steps of: optimizing and regulating along-surface electric field distribution by a macrostructure, optimizing and regulating secondary electron multiplication by a microstructure, and the like. According to the method, integrated optimization design and model construction are carried out by integrating the starting stage and the development stage of vacuum surface flashover, generation of initial electrons is effectively reduced, multiplication of secondary electrons is inhibited, the electric strength of a whole insulation system is greatly enhanced, and the stability of equipment is remarkably improved; according to the method, a ceramic 3D printing photocuring layer-by-layer printing mode is adopted, additional machining or mold manufacturing is not needed, a 3D printer adopting an ultraviolet digital forming technology is combined with a sintering furnace, and an aluminum oxide ceramic component with a complex shape and a delicate pattern can be directly and integrally generated from computer graphic data, so that the development period of a product is greatly shortened, and the production cost is reduced. The production efficiency is improved, and the production cost is reduced.

The invention relates to the technical field of ice making equipment, and discloses an evaporator structure, ice making equipment, an ice making method and a computer readable storage medium, the evaporator structure is used for the ice making equipment and comprises an evaporator body and a support cover plate, and the evaporator body is located at the top of a water tank of the ice making equipment and communicates with the water tank; the support cover plate is connected to the evaporator body, a containing cavity is defined by the support cover plate and the back face of the evaporator body, a water inlet hole and a water outlet hole are formed in the containing cavity, the water inlet hole is located above the water outlet hole, the water inlet hole is used for being communicated with a normal-temperature water source, and the water outlet hole is communicated with the water tank. According to the evaporator structure, the temperature, reduced due to the ice making procedure, of the surface of the evaporator body can be increased before ice unloading, hedging between the high temperature of the ice unloading procedure about to be started of the evaporator and the low temperature caused by the ice making procedure is reduced, the problem that ice blocks crack due to cold and hot impact is effectively solved, and the quality of the ice blocks is improved.

The invention relates to the technical field of alloy preparation, particularly provides a 650 DEG C high temperature resistant titanium-based composite material plate, and further provides a preparation method of the plate. The titanium-based composite material plate resistant to the high temperature of 650 DEG C, provided by the invention, is prepared from the following chemical components in percentage by mass: 6.0 percent to 7.0 percent of Al, 1.0 percent to 3.0 percent of Zr, 0.5 percent to 2.0 percent of Mo, 0.4 percent to 1.0 percent of Nb, 0.4 percent to 1.0 percent of W, 0.1 percent to 0.4 percent of Si, 0.4 percent to 0.7 percent of B, 0.01 percent to 0.10 percent of C and the balance of Ti and inevitable impurities. According to the titanium-based composite material component system provided by the invention, a vanadium element which is easy to generate interface reaction at high temperature is abandoned, and refractory metal elements such as niobium and tungsten are adopted to cooperate with a ceramic reinforced phase formed by boron, carbon and the like, so that the high-temperature performance and the thermal stability of the material are improved; meanwhile, by controlling the content of molybdenum, aluminum and other elements within a specific interval, the hot working performance of the material is remarkably improved while high strength is maintained, and the contradiction between insufficient high-temperature performance and poor hot working performance of a traditional titanium-based composite material is effectively solved.

The application relates to the technical field of nodular column iron pipe processing, and discloses a self-anchored pipe socket welding ring welding device based on construction and an operation method thereof, which comprises a push plate, a self-anchored nodular cast iron pipe and a copper hoop, one end of the top of the push plate is fixedly connected with an electric telescopic table, the output end of the electric telescopic table is fixedly connected with a mounting frame, and the inner wall of the mounting frame is fixedly connected with a first motor. The welding gun arranged at the top of the assembling block reciprocatingly performs slow overlay welding between the two copper hoops under the slow rotation of the first motor, and the application further solves the problem that, in the use process of the traditional self-anchored pipe socket welding ring welding device, when special-sized pipelines are needed, the self-anchored nodular cast iron pipe often needs to be taken to a designated processing factory for processing, which is not only troublesome for the back-and-forth transportation, but also difficult to timely perform secondary processing on the pipe according to the construction demand, so that the pipeline throughness cannot be guaranteed.

This invention discloses a samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal material, its preparation method, and its applications. The samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal material belongs to the monoclinic crystal system, has a space group of Cm, and a chemical formula of Sm. 0.3 La 0.1 :Y 0.6 Ca4O(BO3)3 has a second harmonic response intensity of 0.89 × KDP, and exhibits transmittance exceeding 80% in the 500–1000 nm and 1600–2400 nm wavelength ranges. It also has a strong absorption peak in the 1000–1600 nm wavelength range. Therefore, the samarium-lanthanum co-doped calcium oxyborate yttrium nonlinear optical crystal can be considered as a nonlinear optical crystal material with broad application prospects in the field of optics.

According to the solid-state lithium ion secondary battery and the preparation method thereof provided by the invention, the positive electrode and the solid-state electrolyte layer are co-fired to form a multi-layer ceramic structure, then the multi-layer ceramic structure is compounded with the metal lithium negative electrode and the polymer solid-state electrolyte membrane to form the battery units, and then the plurality of battery units are assembled into the battery cell with the inside connected in series through an isostatic pressing process. By utilizing the preparation method, the application range of the multilayer ceramic technology in the solid-state lithium ion battery is expanded, and the preparation method has a good industrialization prospect.