703results about How to "Increasing the thickness" patented technology

The invention relates to the field of batteries, in particular to a negative plate and a battery comprising the negative plate. The negative plate comprises a negative current collector, a bottom coating and a negative active material layer, the bottom coating and the negative active material layer are positioned on one side or two sides of the negative current collector, the bottom coating is positioned between the negative current collector and the negative active material layer, the bottom coating comprises a three-dimensional structure formed by a first conductive binder, the first conductive binder comprises a first carbon nano tube, and the first carbon nano tube comprises a second carbon nano tube. The negative plate meets the following relational expression: 1.2 < = B / K < = 3.4, B is the length-diameter ratio of the first carbon nanotube, and K is the tensile strength of the negative current collector. According to the negative plate, the thickness of the priming coat can be greatly reduced, and the energy density of the battery is increased; the binding power between the negative electrode current collector and the negative electrode active material layer can be enhanced, the structural stability of the active material layer can be improved, the pole piece deformation and powder falling in pole piece processing and battery circulation can be improved, and the circulation expansion can be inhibited; the conductivity of the pole piece is improved and the fast charging performance of the battery is improved.

The invention discloses an integrated battery box body based on a double-circulation liquid cooling system, which comprises a box body, a battery area, a low-flow-rate pipeline, a high-flow-rate pipeline, a cooler and a liquid pump, a plurality of cooling plates are arranged in the battery area, and low-flow-rate flow channels and high-flow-rate flow channels are arranged in the cooling plates; the two ends of the cooling plate are provided with through openings and switching pipes which are in sliding sealing connection with the low-flow-speed flow channels and used for switching the high-flow-speed pipelines to be communicated with the high-flow-speed flow channels through sliding, and air bag assemblies used for pushing the switching pipes to slide through battery heat changes are arranged in the low-flow-speed flow channels. According to the invention, the battery box body is provided with a low-flow-rate pipeline and a high-flow-rate pipeline which can realize double circulation by only one liquid pump, so that the liquid cooling efficiency of the battery is enhanced; and the switching pipe and the airbag assembly are arranged in the cooling plate, so that the flow speed of the cooling liquid is automatically switched according to the battery temperature, and the liquid cooling efficiency of the cooling plate on the battery is enhanced.

The present disclosure relates to an orthokeratology lens. The orthokeratology lens has a posterior surface for shaping the anterior surface of the cornea, the posterior surface having a base arc region and a reverse arc region. The curvature radius of the base arc area is gradually reduced from the center to the periphery; and / or the curvature radius of the reverse arc area is smaller than that of the base arc area and is gradually reduced from inside to outside. And / or the area with the preset width at the tail end of the base arc area is set as a transition arc area, and the curvature radius of the transition arc area is smaller than that of the base arc area and larger than that of the reverse arc area. Thus, the rear surface optical region can be lifted to increase the thickness of the central tear layer, so that the region is full of tear.

The invention provides a silicon carbon material with a multilayer coating structure and a preparation method and application thereof, and relates to the technical field of battery materials. The silicon-carbon material with the multi-layer coating structure comprises a porous carbon core body, and a first carbon layer and a second carbon layer which sequentially coat the porous carbon core body from inside to outside, and the porous carbon core body comprises porous carbon and nano silicon particles deposited on the surface and in pore channels of the porous carbon; and a conductive nano carbon filler is dispersed in the second carbon layer. The silicon carbon material with the multilayer coating structure provided by the invention is used as a lithium ion battery negative electrode material, and has excellent specific capacity, coulombic efficiency and cycle performance. The result of the embodiment shows that when the silicon carbon material with the multi-layer coating structure is applied to the lithium ion battery, the first reversible capacity is 1882-2071 mAh / g, the first coulombic efficiency is 92.6-94.1%, and the capacity retention ratio of 100 cycles is 95.3-97.7%.

The invention belongs to the technical field of lithium ion batteries, and relates to a liquid injection method of a lithium ion battery, in particular to a lithium ion battery electrolyte combination, a secondary liquid injection process and the lithium ion battery. The calculation formula of the mass content (W1) of the vinylene carbonate in the first electrolyte is # imgabs0; the calculation formula of the mass content (W2) of the vinylene carbonate in the second electrolyte is # imgabs1 # imgabs2 #, and W1 is less than W2. According to the invention, the content of vinylene carbonate in the electrolyte injected twice is adjusted according to the proportion of the secondary particles, the content of the negative electrode active material, the interlayer spacing of the graphite particles and the interlayer spacing of the carbon coating layer, so that the performance of the lithium ion battery can be better improved.

The invention provides a plant fiber molding pulp suction device. The plant fiber molding pulp suction device comprises a pulp tank, a rack assembly, a transplanting mechanism and a pulp suction assembly, the transplanting mechanism is arranged on the rack assembly and is positioned above the pulp tank; a forming cavity is formed in the pulp suction assembly, a cavity opening of the forming cavity faces the liquid level of the pulp chest, and pulp enters the forming cavity through the pulp opening so as to complete pulp suction operation; the pulp suction device comprises a pulp suction assembly and a transplanting mechanism, the pulp suction assembly is connected with the transplanting mechanism, the transplanting mechanism drives the pulp suction assembly to lift up and down so that the pulp suction assembly can go deep into or be far away from the liquid level of the pulp chest, and the pulp suction assembly is connected with external control equipment and is matched with the transplanting mechanism so as to control the pulp suction device to complete pulp suction operation. According to the plant fiber molding pulp suction device, it can be guaranteed that the wall thickness of a container product is uniform, the product percent of pass of the container product is increased, and the market requirement is greatly met.

The invention provides a temperature damage detection method based on an optimized vacuum sintering furnace and a temperature measuring device, and belongs to the related field of heat transfer science, and the method comprises the following steps: optimizing a vacuum sintering furnace structure by adopting different thermal insulation structures, and deducing a one-dimensional performance simulation model of a carbon felt thermal insulation layer; according to the one-dimensional performance simulation model of the carbon felt thermal insulation layer, the temperature rise curve and the workpiece temperature, the value range of the thickness of the carbon felt thermal insulation layer at different sintering temperatures is calculated by utilizing a reverse simulation principle, and then the optimal thickness of the carbon felt thermal insulation layer is obtained in the value range of the thickness of the carbon felt thermal insulation layer at different sintering temperatures by utilizing forward simulation; and the optimal thickness of the carbon felt heat preservation layer is adopted as the length of the temperature measuring device, the temperature measuring device of the vacuum sintering furnace is constructed, the temperature of the vacuum sintering furnace is measured through the multiple temperature measuring devices, and a temperature damage detection result is obtained according to the measurement result. According to the method, the problem that the temperature in the effective heating area after structure optimization cannot be directly measured due to too high temperature is solved.

The invention discloses a high-quality laser welding manufacturing device and a high-quality laser welding manufacturing method, which solve the problems of concentrated energy distribution, small inherent focal depth, insufficient depth-diameter ratio of welding and insufficient welding thickness of the existing ultrafast laser welding technology. The zoom collimation system, the cone mirror, the acousto-optic modulation unit and the long focal depth compression unit are sequentially arranged on a light path where the welding laser is located in the emergent direction of the welding laser. The zoom collimation system is used for changing the spot diameter of the welding laser and collimating the spot diameter; the cone mirror is used for shaping the welding laser subjected to diameter-variable collimation into long-focal-depth laser; the acousto-optic modulation unit divides the long-focal-depth laser into N sub-beams and adjusts the spatial position of each sub-beam, and N is a positive integer greater than or equal to 1; and the long focal depth compression unit is used for adjusting the spot diameter and focal depth length of each sub-beam, so that the focal position and energy of each sub-beam are suitable for laser welding.

The invention provides a main shaft structure which comprises a pipeline disc, a rear end seat, a shaft core, a water retaining ring and a rear shaft core end cover, the rear end seat is located on the periphery of at least part of a shaft section of the shaft core, the pipeline disc and the rear end seat are arranged at intervals in the axial direction, and the water retaining ring is further arranged between the pipeline disc and the rear end seat. At least part of the structure of the water retaining ring is located on the periphery of at least part of the structure of the shaft core, the rear shaft core end cover is arranged at the axial upper end of the shaft core, a containing cavity is formed in the upper end of the rear shaft core end cover, a water outlet hole is formed in the water retaining ring, and the water outlet hole is located below the containing cavity and can be communicated with the containing cavity. Water in the containing cavity can be discharged out of the main shaft structure through the water outlet hole. Water can be effectively prevented from entering the motor at the lower end of the spindle structure, the waterproof sealing effect on the motor of the spindle structure is achieved, and the problem that in the prior art, water easily enters the motor of an electric spindle, and potential safety hazards are caused is solved.

The invention relates to a packaging electrode, a manufacturing method thereof and a semiconductor packaging device. The manufacturing method comprises the steps that a diamond composite metal base layer is prepared, a first alloy layer and a second alloy layer are formed on the upper side surface and the lower side surface of the diamond composite metal base layer respectively, and a conductive flange is formed on the side wall of the diamond composite metal base layer; the diamond composite metal base layer, the first alloy layer, the second alloy layer and the conductive flange are of an integrated structure. The surfaces, deviating from the diamond composite metal base layer, of the first alloy layer and the second alloy layer are machining surfaces and are used for being in direct contact with a chip; the flange welding surface of the conductive flange is free of diamond composition. According to the invention, the forming quality and performance of the large-size packaging electrode can be improved, so that the packaging reliability of the semiconductor packaging device can be effectively improved.

The invention relates to the technical field of petroleum and natural gas development, and discloses a double-sheath mineral insulated heating cable and a preparation method and application thereof. The double-sheath mineral insulation heating cable sequentially comprises a core body, an insulation heat conduction layer, an inner sheath layer and an outer sheath layer from inside to outside. Wherein the yield strength of the inner sheath layer is greater than or equal to 205 MPa, the tensile strength is greater than or equal to 520 MPa, the ductility is greater than or equal to 35%, and the hardness is less than or equal to 32 HRC; the yield strength of the outer sheath layer is greater than or equal to 205 MPa, the tensile strength is greater than or equal to 520 MPa, the elongation is greater than or equal to 35%, and the hardness is less than or equal to 32 HRC; the thickness of the outer sheath layer is 30%-50% smaller than that of the inner sheath layer, the heat conductivity of the inner sheath layer is not larger than that of the outer sheath layer, and the heat conductivity of the inner sheath layer is not smaller than that of the insulating heat conduction layer. The double-sheath mineral insulation heating cable can be suitable for being applied to deep wells and ultra-deep wells of H2S, CO2 and Cl <->, the use temperature is 350-750 DEG C, and the service life is more than 3 years.

The invention relates to the technical field of transparent conductive material repairing, in particular to a repairing method of a micro-metal network structure based on electrochemical deposition. The repairing method of the micro-metal network structure based on electrochemical deposition comprises the following steps: S1, preparing a corresponding electrolyte mixed solution according to the type of metal in the micro-metal network structure to be repaired, and placing the electrolyte mixed solution in an electrolytic bath; and S2, the micro-metal network structure to be repaired is placed in an electrolytic bath to be repaired. S3, judging whether the micro-metal network structure is repaired or not; and if the repair is completed, taking out the micro-metal network structure from the electrolytic bath, and if the repair is not completed, repeating the step S2 until the repair of the micro-metal network structure is completed. According to the repairing method, the electrochemical deposition principle is utilized, material deposition can be accurately carried out at the defect position of the micro-metal network structure, directional repairing is achieved, and the conductivity and the light transmittance of the repaired micro-metal network structure are improved.

The invention discloses a microphone and electronic equipment, and relates to the technical field of microphones, the microphone comprises a substrate, a shell, a chip assembly and an electronic component, the substrate comprises a top layer, a first conductive layer, an insulating layer and a second conductive layer which are sequentially arranged along a first direction; the first direction is the direction along the thickness of the substrate; the shell covers the substrate, the shell and the substrate define an accommodating cavity, and the substrate is provided with a pickup hole communicated with the accommodating cavity; the chip assembly comprises a pickup module and a signal processing module which are in signal connection, and the pickup module is located in the accommodating cavity; the electronic component is electrically connected with the signal processing module; the electronic component is embedded in the insulating layer, and the two ends of the electronic component are electrically connected with the first conductive layer and the second conductive layer respectively. The electronic component is embedded in the insulating layer between the first conductive layer and the second conductive layer, so that the specification of the electronic component can be flexibly selected, the thickness of the substrate is not additionally increased, and the selectable specification of the electronic component is increased.

The invention relates to the technical field of medicines, and discloses application of D-mannose in prevention and treatment of androgenetic alopecia. In the prior art, D-mannose can be a potential strategy for treating ferroptosis related diseases, can also be a non-prescription medicine supplement with high safety, and is used for treating neuritis diseases such as multiple sclerosis. The androgenic alopecia mouse model is constructed by utilizing dihydrotestosterone induction, the model mouse is subjected to mannose intervention, and the result shows that application of mannose can promote mouse hair growth, increase cortex thickness, promote hair regeneration and melanogenesis and effectively resist alopecia caused by dihydrotestosterone. The invention provides a new effect of mannose in prevention and treatment of androgenetic alopecia, and also provides a new strategy for prevention and treatment of androgenetic alopecia.

The invention provides a semiconductor laser element and a light-emitting device. An electron blocking layer is arranged between a second coating layer and a second waveguide layer of the semiconductor laser element; the second semiconductor layer is doped with a P-type dopant, the P-type dopant in the electron blocking layer has at least one doping concentration peak, the doping concentration of Mg at the doping concentration peak is smaller than the maximum doping concentration of the P-type dopant in the second semiconductor layer, and the P-type dopant in the electron blocking layer gradually approaches the direction of the electron blocking layer. The doping concentration of the P-type dopant in the second coating layer is provided with a plurality of subareas, and the doping concentration curve of the P-type dopant is gradually reduced along the plurality of subareas. Due to the descending trend of the Mg doping concentration in the second semiconductor layer, it can be guaranteed that the second semiconductor layer can provide enough holes, the hole injection efficiency in the quantum well layer is improved, and the light emitting efficiency is improved. Meanwhile, due to the arrangement of the second semiconductor layer, light absorption can be reduced, and the light emitting effect of the device is improved.

The utility model belongs to the technical field of lithium batteries, and discloses a diesel locomotive lithium battery capable of being charged and limited by double guns, which comprises a base, a battery box is fixedly connected to the top of the base, a battery pack is mounted in the battery box, a prompt component is mounted above the battery pack, the battery box consists of a heat insulation outer shell and a heat conduction inner shell, and the heat conduction inner shell is connected with the heat insulation outer shell. A cooling liquid filling cavity is formed between the heat insulation outer shell and the heat conduction inner shell, the battery box is connected with a sealing cover through bolts, the prompting assembly comprises a grid plate attached to the upper surface of the battery pack, movable rods are fixedly connected to the four corners of the top of the grid plate, and positioning sleeves are fixed to the positions, corresponding to the movable rods, of the battery box. The positioning sleeve penetrates through the battery box, when the battery pack is wrapped, the thickness of the battery pack is increased, and then the grid plate is pushed to move upwards, so that the top end of the movable rod leaves the positioning sleeve, and workers can find problems in time and overhaul or replace lithium batteries in time.

The invention provides a battery monomer, a manufacturing method of the battery monomer, a battery device and a power utilization device.A pole piece in an electrode assembly of the battery monomer comprises a current collector, an active material layer, a connecting layer and a solid electrolyte layer which are stacked in sequence, a groove area is formed in the surface, away from the active material layer, of the connecting layer, and the groove area is provided with an inwards-sunken groove; the solid electrolyte layer is arranged on the surface, away from the active material layer, of the connecting layer and covers the groove area, and part of the solid electrolyte layer enters the groove and is connected to the inner wall of the groove. Because part of the solid electrolyte layer enters the groove and is connected to the inner wall of the groove, the solid electrolyte layer in the groove area has a large thickness, the solid electrolyte layer in the groove area and the connecting layer have a large contact area, the solid electrolyte layer is not easy to fall off, and the service life of the solid electrolyte layer is prolonged. The possibility of failure caused by small thickness or falling of the solid electrolyte layer is reduced, so that the two adjacent pole pieces are not easy to overlap to cause short circuit, and the improvement of the reliability of the battery monomer is facilitated.

The invention provides a design method and a preparation method of a 1.8-4 [mu] m silicon-based lens anti-reflection film. The design method of the 1.8-4 [mu] m silicon-based lens anti-reflection film comprises the steps that Sa, a film system is designed with 550 nm as the reference wavelength of optical film design, a film stack formula Sub / 0.3 M 0.8 N (HL) 3K / AIR is used, the two faces of Sub are plated with the same film system, Sub is a silicon substrate, AIR represents air, in the film stack formula, H represents a high-refractive-index material ZnS with the 1 / 4 wavelength thickness, L represents a low-refractive-index material YbF3 with the 1 / 4 wavelength thickness, and in the film stack formula, Z represents a high-refractive-index material ZnS with the 1 / 4 wavelength thickness; m represents a base layer material SiO with the thickness of 1 / 4 wavelength, N represents a connecting layer material Ge with the thickness of 1 / 4 wavelength, K represents protective layer materials Al2O3 (aluminum oxide) and Sb with the thickness of 1 / 4 wavelength, and a film layer structure of Sub / SiO / Ge / ZnS / YbF3 / Al2O3 / Air is generated through an input film stack formula; sc, the thickness of the film layer is optimized through thin film design software, the optimal thickness of the film layer is obtained, and the transmittance of the 1.8-4-micron wave band of the optimized film layer structure meets the requirement; and Sd, the optimized film layer thickness is input into a control computer of the coating machine.

The invention discloses an anti-corrosion polypropylene special material, a preparation method and an anti-corrosion steel pipe, and relates to the 3PP anti-corrosion field, and the anti-corrosion polypropylene special material comprises the following components by mass: 10-30 parts of maleic anhydride grafted polypropylene, 40-70 parts of pipeline-grade polypropylene, 5-40 parts of co-polypropylene, 3-10 parts of an elastomer, 1-2 parts of rutile titanium dioxide, and 1-2 parts of an anti-aging auxiliary agent. According to the invention, maleic anhydride grafted polypropylene is compounded with different polypropylene, elastomers and assistants, and a traditional polypropylene adhesive and a special material for corrosion prevention of polypropylene are combined, so that the special material for polypropylene has bonding and corrosion prevention functions; the problems that a traditional adhesive is thin in thickness and prone to breakage in the extruding and winding process, so that adhesive lacking is caused, and delamination is caused between epoxy and polypropylene special materials are effectively solved.

The invention relates to an integrated carbon / carbon composite material crucible containing a pyrolytic carbon transition coating, and belongs to the technical field of thermal field parts for monocrystalline silicon. The crucible comprises a carbon / carbon composite material crucible body, a glassy carbon coating, a pyrolytic carbon transition coating and an yttrium oxide coating, wherein the glassy carbon coating not only has a good combination effect with the carbon / carbon composite material crucible body, but also can prevent carbon from escaping; the thermal expansion coefficient of the pyrolytic carbon transition coating is close to that of the glassy carbon coating, and the combination effect of the pyrolytic carbon transition coating and the yttrium oxide coating is good; the yttrium oxide coating has excellent thermal stability and excellent silicon erosion resistance, and can ensure the purity of molten silicon in the single crystal drawing process; the carbon / carbon composite material crucible body is formed by densifying a carbon fiber prefabricated body which is formed by needling and laying a pure net tire sprayed with resin, and the inner surface of the carbon / carbon composite material crucible body is a net tire which is wholly approximately isotropic, so that the overall mechanical strength of the crucible can be ensured, and a good combination effect of the crucible and a subsequent functional coating can also be ensured.

The invention discloses a warm-keeping yarn which at least contains a fiber bundle with the hollowness of 5-25%, and the fiber bundle at least contains two kinds of fibers with shrinkage rate difference. According to the invention, the fibers with fineness and shrinkage difference and a specific spinning process are combined to prepare the spun yarn with hollowness, so that the lightweight and warm-keeping yarn is provided, and the problem that the wearing comfort and the warm-keeping property cannot be considered at the same time in the prior art is solved.

The invention belongs to the technical field of lithium ion batteries, and discloses a preparation method of a high-conductivity high-voltage-resistant sulfide electrolyte membrane and a high-voltage all-solid-state battery. A high-voltage-resistant electrolyte system such as halide electrolyte and polymer electrolyte is introduced on the surface of the sulfide electrolyte membrane as a modification layer, so that the side reaction of the electrolyte membrane and a positive electrode under high voltage is effectively relieved. The high-voltage positive electrode, the modified double-layer sulfide electrolyte membrane and the negative electrode are combined to be used for assembling the high-voltage sulfide all-solid-state lithium ion battery. By using the method, the double-layer electrolyte membrane with a compact high-voltage protection layer uniformly distributed on the surface can be prepared, and a relatively good high-voltage-resistant effect is achieved. The further prepared high-voltage all-solid-state battery not only has better charge-discharge performance under high voltage, but also has stable cycle performance.

The invention relates to the field of silk processing technology, and specifically discloses a silk yam fragrance and weight enhancement dyeing process and equipment, comprising the following steps: step one: putting silk into a plasma processor, performing low-temperature treatment, and enhancing the coloring rate; step two: mixing plant extract and water in a ratio of 1:10 to prepare a dyeing liquid, wherein the plant extract is yam liquid; step three: pouring the dyeing liquid into an ultrasonic container, and then putting silk in to soak for 2-5 minutes; step four: then placing the soaked silk on a steam rack, steam rising to the lower surface of the silk, and placing a solar lamp above the silk to dry the upper surface of the silk, wherein the solar lamp is a lamp that imitates sunlight; step five: repeating the above steps three times; step six: mixing plant extract, water, rose extract, and thickening liquid in a ratio of 1:5:1:1 and adding them to a coating machine, and then putting the silk into the coating machine for coating operation; repeating step 4 for drying operation, and finally making Xiangyun yarn.

The invention discloses a preparation method of a silicon nitride composite structural part, and relates to the technical field of thermal protection parts of overspeed aircrafts. According to the method, the functional gradient principle is adopted, ZrO2 is doped into one layer to achieve the high temperature resistance of the material, the high-temperature resistance of the material is further improved by adopting a porous technology, the physical strength of the whole component is compensated for by adopting a high-toughness and high-strength technology for the second layer, and the ZrO2 is subjected to conversion from a monoclinic phase to a tetragonal phase and then to a cubic phase in the heating process. The phase change process can absorb a large amount of energy along with the change of the volume, so that the toughness of the material is improved, the outer temperature-resistant layer is prepared, the characteristic of the strength of the silicon nitride material is exerted, and the inner force-bearing layer is prepared.

The invention discloses a display device with an active red light function and application thereof, and belongs to the technical field of display. Comprising a backlight unit; the backlight unit comprises a light guide plate and a light source; the light source comprises a red light source and a blue light source; the light source is located on the lower side of the diffusion plate or located on at least one side of the periphery of the light guide plate. A quantum dot yellow film, a first prism film, a second prism film, a DBEF brightness enhancement film, a diffusion film and a liquid crystal panel are sequentially arranged on the upper side of the diffusion plate or the light guide plate from bottom to top in a stacked mode. When the display device is applied, the white light mode is used for conventional use, the quantum dot yellow film is used for converting blue LED backlight, high-purity green light and eye protection red light with the long wavelength of 650 nm are emitted, the blue light content in the display device can be remarkably reduced, the display color gamut can be improved, and the eye use comfort degree can be improved. In the red light mode, the display device is used for emitting high-intensity long-wavelength 650nm eye protection red light, so that the beneficial effects of preventing and controlling myopia and protecting eye health are achieved.

The invention provides a magnetron sputtering coating method, a coating product and a coating device, and relates to the technical field of magnetron sputtering coating, the magnetron sputtering coating method comprises the following steps: placing a target material and a substrate in a vacuum cavity; configuring a first preset magnetic field, wherein the central magnetic field intensity of the first preset magnetic field is greater than or less than the peripheral magnetic field intensity; carrying out sputtering coating on the substrate for the first time; configuring a second preset magnetic field, wherein the central magnetic field intensity of the second preset magnetic field is equal to the peripheral magnetic field intensity; and carrying out sputtering coating on the substrate for the second time. According to the magnetron sputtering coating method provided by the embodiment of the invention, the first preset magnetic field is adopted for sputtering in the first sputtering process, the central magnetic field intensity is larger than or smaller than the peripheral magnetic field intensity, damage to the base body can be reduced, the formed protective layer makes better contact with the front layer on the base body, and the service life of the protective layer is prolonged. And on the basis, the compactness of a subsequent deposited film is also improved, and the film quality is improved.

The invention relates to the technical field of soft magnetic ferrite materials, in particular to a nickel-zinc ferrite material as well as a preparation method and application thereof. The invention provides a nickel-zinc ferrite material. The nickel-zinc ferrite material comprises the following raw materials: main components and auxiliary components, wherein the main components comprise Fe2O3, NiO, ZnO and CuO; the mass percentage of Fe2O3 in the main component is 64.05 to 68.72 wt%, the mass percentage of NiO in the main component is 14.12 to 17.36 wt%, the mass percentage of ZnO in the main component is 11.61 to 15.02 wt%, and the mass percentage of CuO in the main component is 3.82 to 4.45 wt%; based on the total weight of the main components, the auxiliary components comprise 0.2 wt%-0.6 wt% of Al2O3, 0.05 wt%-0.25 wt% of SiO2 and 0.1 wt%-0.35 wt% of MnO2. According to the nickel-zinc ferrite material, specific main components and auxiliary components are selected, and the contents of the main components and the auxiliary components are limited, so that all the components generate a synergistic effect, and finally the nickel-zinc ferrite material with excellent comprehensive performance is obtained.

The invention discloses a protection liquid for green light cutting and a preparation method and application thereof.The protection liquid is prepared from, by mass, 20-40 parts of water-soluble resin, 0.25-0.5 part of a green light absorbent and 50-100 parts of a solvent; wherein the water-soluble resin comprises water-soluble polyester and sodium polystyrene sulfonate; the green light absorbent comprises allura red and lac acid. The water-soluble resin is not easy to etch, the etching selection ratio is high, and the etching depth required by the base material can be met under the condition that the loss of the protective film layer is minimum; the relatively high solubility of sodium polystyrenesulfonate is beneficial to improving the solid content of the resin, improving the thickness of a film layer and improving the stability of the protection liquid; besides, the green light absorbent adopts the combination of allura red and lac acid, so that the solution stability and the light stability of the green light absorbent can be ensured, the addition amount of the absorbent is increased, and the absorbance is improved.

The invention provides a wet-process phosphoric acid concentrated waste gas recovery device and a process thereof, and relates to the technical field of chemical production, the wet-process phosphoric acid concentrated waste gas recovery device comprises a tower body, a gas inlet allowing waste gas to enter the tower body is formed in the bottom of the tower body, a gas outlet is formed in the top of the tower body, a spraying assembly is arranged in the tower body, and the spraying assembly can spray an arc-shaped water curtain; the tower body is provided with a gas inlet and a gas outlet, the arc-shaped water curtain is located between the gas inlet and the gas outlet and divides the tower body into a gas storage area and a gas exhaust area, the gas storage area is close to the gas inlet, the gas exhaust area is close to the gas outlet, and the arc-shaped water curtain is used for purifying waste gas entering the gas exhaust area from the gas storage area. The device has the effects of increasing the contact area between a water body and waste gas, enhancing the waste gas purification effect, reducing the possibility that the waste gas is directly discharged without being filtered by water flow, and further meeting the environment-friendly requirement.

The invention provides a back contact battery, a photovoltaic module and a photovoltaic system. The back contact battery comprises a battery substrate, a plurality of main grids, a plurality of slurry nodes and a plurality of first insulating parts. The battery substrate comprises a tandem connection area and a non-tandem connection area; a plurality of slurry nodes are formed in the cascading area; the first insulating parts are arranged in the serial connection area, the first insulating parts and the main grids are correspondingly arranged, the first insulating parts are arranged in the first direction, the first insulating parts cover the slurry nodes, in the first direction, a first gap is formed between every two adjacent first insulating parts, and part of the main grids are exposed out of the first gaps. Therefore, the first insulating parts corresponding to the main grids are arranged in the serial connection area and cover the slurry nodes, the first gaps are formed between the two adjacent first insulating parts, and the main grids are partially exposed from the first gaps, so that the first insulating parts can be arranged in blocks, the thickness of the first insulating parts is increased, the slurry nodes in the serial connection area are prevented from being conducted with the welding strip, and the reliability of the welding strip is improved. And the reject ratio of the photovoltaic module is reduced.