94results about How to "Uniform structure" patented technology

The invention relates to a fiber-reinforced aerogel composite material containing a carbon and titanium dioxide biphase hybrid opacifying agent as well as a preparation method and application of the fiber-reinforced aerogel composite material. The fiber reinforced aerogel composite material containing the carbon and titanium dioxide dual-phase hybrid opacifying agent comprises an inorganic aerogel matrix, wherein a reinforced fiber skeleton and the carbon / titanium dioxide dual-phase hybrid opacifying agent are dispersed in the inorganic aerogel matrix; the carbon / titanium dioxide biphase hybrid opacifying agent comprises a titanium dioxide shell layer and carbon / titanium dioxide core-shell structure particles, wherein the surface of a reinforced fiber skeleton is coated with the titanium dioxide shell layer in situ; gaps of the reinforced fiber skeleton are filled with the carbon / titanium dioxide core-shell structure particles. The problem to be solved is to construct a two-phase hybrid shading system in which carbon / titanium dioxide core-shell particles and a titanium dioxide coating layer on the fiber surface are combined through one-step in-situ synthesis, so that the heat insulation capacity of the composite material in a high-temperature environment is synergistically improved.

The invention discloses a composite catalyst for a peracetic acid activation system and a preparation method and application thereof, and relates to the technical field of advanced oxidation water treatment. The preparation method of the catalyst comprises the following steps: preparing an aqueous solution of a cobalt source as a precursor solution; adding a manganese source into the precursor solution to obtain a Co-Mn mixed salt solution; adding a complexing agent into the Co-Mn mixed salt solution to form a stable sol system; heating the sol system at constant temperature to obtain wet gel; drying the wet gel to obtain a porous dry gel precursor; calcining the porous xerogel precursor, and then cooling and grinding to obtain the composite catalyst for the peracetic acid activation system. The composite structure in the catalyst greatly improves the rate of generating hydroxyl radicals and organic oxygen radicals by decomposing peracetic acid by promoting electron transfer circulation of a metal active center, shows good structural stability and recyclability, and is especially suitable for degradation of an organic pollutant sulfamethoxazole in a water body.

This invention discloses a high-speed slitting device for cold-rolled steel sheets, relating to the field of cold-rolled steel sheet shearing technology. It includes a shearing assembly for cutting cold-rolled steel sheet coils, with a pre-treatment box mounted on the front surface of the shearing assembly. In operation, the invention starts an electromagnetic rod and a rolling motor. The rolling motor drives a drive gear to rotate, which in turn drives two driven gears to rotate in opposite directions. These gears, through a gear ring, drive two toothed rods to rotate, further rotating the upper and lower rolling rollers to electromagnetically roll the two sides of the cold-rolled steel sheet. Combined with an eddy current sensor and a PLC controller, the magnetic field force is intelligently and dynamically adjusted according to the edge conditions of different hardness levels, achieving "flexible de-hardening." Then, a U-shaped focusing induction coil is activated to achieve rapid localized heating of the hardened layer, restoring the hardness to near that of the substrate, thus eliminating work hardening. The combination of magnetic rolling and localized heating softening achieves "full-thickness softening."

The application provides a preparation process of high-strength concrete, and belongs to the technical field of concrete, and comprises the following steps: step S1, Mg-Al-LDH-NO2 powder is prepared; step S2, microcapsules are prepared; step S3, machine-made sand, granite crushed stone, Portland cement, slag powder, limestone powder, metakaolin, microcapsules, water, a water reducing agent and Mg-Al-LDH-NO2 powder are mixed and stirred to obtain high-strength concrete. The application can achieve the purpose of improving the strength and durability of concrete.

The invention relates to the technical field of automobile parts, and particularly discloses an anti-oxidation corrosion-resistant automobile air-inlet grille and an electroplating process thereof.The anti-oxidation corrosion-resistant automobile air-inlet grille is prepared from phenoxy-terminated siloxane modified polycarbonate, ABS resin, a modified LDHs antioxidant, a compatilizer ABS-g-MAH and a lubricant ethylene bis stearamide through melt blending, extrusion granulation and injection molding. And a copper layer, a nickel-phosphorus layer and a cobalt-chromium layer are further electroplated and deposited on the automobile air-inlet grille, and the anti-oxidation and corrosion-resistant automobile air-inlet grille is formed.

This invention relates to the field of inorganic materials, specifically a method for preparing antimony trioxide from antimony concentrate. The method involves adding a DNA template and a mercapto quaternary ammonium salt ionic liquid to water to obtain a first solution, and adding antimony glycolate to ethanol to obtain a second solution. The second solution is then added to the first solution, the pH of the reaction solution is adjusted to 5-6, and a hydrolysis reaction is carried out. The collected product is then calcined to obtain antimony trioxide. Antimony trioxide exhibits great application potential as a high-performance pseudocapacitor electrode material. Its unique hollow one-dimensional channel and ultra-high specific surface area also indicate broad application prospects in flame retardant synergy, gas sensing, catalysis, and other fields.

The utility model relates to a kind of natural gas hydrogen-oxygen gas negative pressure mixer structure, including fixed seat, ignition device, gas pipe, hydrogen-oxygen gas pipe and combustion air duct, the gas pipe and hydrogen-oxygen gas pipe are located in combustion air duct inside, combustion air duct front end is provided flame outlet, hydrogen-oxygen gas pipe front end is connected with gas pipeline middle section by jet mixer, gas pipe front end is closed and has gas hole around, gas pipe front end stretches to flame outlet place.The utility model natural gas hydrogen-oxygen gas negative pressure mixer structure structure is novel, reasonable in design, using internal mixing structure, hydrogen-oxygen gas and gas are mixed in burner, avoid the security risk that hydrogen-oxygen gas exists in external premixing, improve safety, and mixed by jet mixer, utilize venturi effect, by the negative pressure formed active suction hydrogen-oxygen gas generated, ensure that mixing is uniform, improve combustion efficiency, reduce energy loss.

This invention relates to the field of polymer synthesis technology. This invention provides a controlled polymerization method for a high-alternation-degree ETFE copolymer, comprising the following steps: (1) adding a solvent to a high-pressure reactor, replacing the air, and then filling it with an initial monomer mixture to a total pressure of 1.5-2.5 MPa, wherein the monomer mixture is a mixture of tetrafluoroethylene and ethylene; (2) heating to 60-85°C, adding an initiator to initiate the polymerization reaction; (3) simultaneously adding the monomer mixture continuously or semi-continuously during the polymerization reaction; (4) adding a chain transfer agent, and discharging the product after the reaction, i.e., the high-alternation-degree ETFE copolymer. This invention also provides a controlled polymerization method for a high-alternation-degree ETFE copolymer. This invention also provides an application of the high-alternation-degree ETFE copolymer in new energy, aerospace, high-end equipment manufacturing, and photovoltaic fields. The high-alternation-degree ETFE copolymer of this invention has high alternation degree (>92%), high thermal stability, and excellent mechanical properties.

The machine (1) has a capsule extraction module (10, 20) for preparing a beverage from ingredients contained in such capsules (100) by supplying an extraction liquid (e.g., water) into the capsules (100). The extraction module (10, 20) has: a first capsule encapsulation component and a second capsule encapsulation component (10, 20) movable relative to each other between a proximity position for encapsulating and processing the capsules (100) to prepare a beverage in the module (10, 20), and a distance position for inserting and removing the capsules (100) from the module (10, 20); and a capsule removal device (40, 50) for assisting in removing such capsules (100) as the first and second components (10, 20) move from the proximity position to the distance position. At least one of the first capsule encapsulation component and the second capsule encapsulation component (10, 20) has a corresponding mating surface (11, 21) extending above the corresponding capsule (101). At least one of the first pressing member and the second pressing member (40, 50) includes a pressing surface (41, 51) for pushing the corresponding capsule end face (101, 102) away from the corresponding encapsulation component mating surface (11, 21). The first pressing surface (41) and the first encapsulation component mating surface (11) have a surface area ratio of at least 0.1 and / or at most 10; and / or the second pressing surface (51) and the second encapsulation component mating surface (21) have a surface area ratio of at least 0.05 and / or at most 0.2.

The invention belongs to the technical field of polymer composite materials and functional electrolyte materials, and relates to an interface covalently constructed MOF composite electrolyte film, and a preparation method and application thereof. The method comprises the following steps: preparing a polymer matrix formed by polymerizing imidazole zwitterionic monomers and a metal organic framework material; the preparation method comprises the following steps: sequentially adding a polymer matrix formed by polymerizing imidazole zwitterionic monomers, a metal organic framework material, an ionic liquid and a photoinitiator into a methanol solvent to obtain a precursor suspension; initiating free radical polymerization reaction of acrylate double bonds by the precursor suspension in a photo-initiation or thermal initiation mode to form an initial three-dimensional cross-linked network; and heating the initial three-dimensional cross-linked network to volatilize the methanol solvent, and cooling to room temperature to obtain the interface covalently constructed MOF composite electrolyte film. Through covalent bonding interface engineering design, the problems of poor dispersibility and weak interface bonding of MOF in a polymer matrix are solved. The obtained film has excellent mechanical properties and ionic conductivity.

This invention discloses a method for preparing in-plane test specimens of composite materials and its product. The method includes providing a composite prepreg and laying it at a preset lamination angle to form multiple laminated modules; vacuuming each laminated module and then ironing its surface with an electric iron; stacking at least two ironed laminated modules and vacuuming them again to obtain a laminated structure; hot-pressing and curing the laminated structure to form a composite material layer, forming an integral plate; fixing the integral plate to a first PVC pad with a first pressure-sensitive double-sided adhesive to form a cut sample; fixing a second PVC pad to a cutting equipment worktable with a second pressure-sensitive double-sided adhesive; and using a grinding wheel disc cutter to cut and grind the fixed cut sample in an integrated manner to obtain a test specimen, effectively overcoming the drawbacks of traditional integral vacuuming.

This invention discloses a cylindrical expandable polystyrene mold, comprising: a mold body, the mold body including a first mold body and a second mold body, the first mold body being sleeved on and fixedly disposed with the second mold body; the first mold body having a plurality of first through holes circumferentially spaced for bolts to pass through, thereby fixing the mold to an expandable polystyrene preparation device; the second mold having a circular hole in the center, and a plurality of second through holes circumferentially arranged near the circular hole, the second through holes being used to fix a conical guide to the mold; and a plurality of outlet molds located away from the circular hole. Expandable polystyrene is also produced by this mold. The cylindrical expandable polystyrene prepared using this mold exhibits strong bonding and excellent mechanical strength. Helmets made using this cylindrical expandable polystyrene also possess excellent mechanical strength.

This invention discloses a fermentation control method for adjusting the gluten protein network structure, relating to the field of food processing technology. It aims to solve the problem of the difficulty in stably constructing an ideal gluten protein network structure using existing technologies. The method includes the following steps: S1, selecting high-gluten wheat flour with a protein content of 12%-15%, and mixing it with water at a ratio of 1:0.5-0.6 to form a dough; S2, placing the dough in a static magnetic field environment with an intensity of 0.5-1.0 mT for 15-30 minutes; S3, transferring the dough to an environment with a temperature of 28-30℃ and a relative humidity of 70%-75% for a first fermentation of 60-90 minutes; S4, after the first fermentation, gently folding the dough 3-5 times, and then letting it rest for 10-15 minutes; S5, placing the dough again in an environment with a temperature of 32-35℃ and a relative humidity of 75%-80% for a second fermentation of 30-45 minutes. This invention has the advantage of making the gluten network structure formed in the dough during fermentation more uniform and dense.

This application relates to the field of biomedical engineering, specifically disclosing a stem cell preparation for treating acute ischemic stroke and its preparation method. The preparation comprises a carrier core formed integrally through membrane fusion and an engineered stem cell membrane shell. The carrier core is a homologous stem cell exosome loaded with reactive oxygen species (ROS) scavenging nanoenzymes and can anchor responsive hydrogel microspheres encapsulating neurotrophic factors. The engineered shell covers the core, and its surface is covalently linked to brain-targeting molecules and thermosensitive lipid molecules, the latter of which can expose the target molecules at body temperature for intelligent navigation. The preparation method includes stepwise preparation of the drug-loaded core and functionalized shell, followed by programmed freeze-thaw treatment to induce membrane fusion of the two into a complete preparation. The product of this application can efficiently target ischemic lesions and achieve sequential synergistic treatment by first scavenging ROS and then releasing trophic factors. Its preparation method has advantages such as modularity, mild conditions, and good preservation of bioactivity.

The utility model relates to the technical field of calcination of zirconia ceramic structural parts, in particular to a multi-section temperature control calcination device for zirconia. A heating mechanism is arranged in a main body, a feeding mechanism is installed at a feeding port of the heating mechanism, a cooling mechanism is installed at a discharging port of the heating mechanism, the heating mechanism comprises a preheating cavity and a calcination cavity, and the calcination cavity is rotatably installed in the main body; heating resistors are uniformly mounted outside the calcining cavity, temperature sensors are uniformly mounted in the calcining cavity, the main body is controlled by a PLC (Programmable Logic Controller), and the PLC is mounted in an operation table; the feeding mechanism comprises a stock bin and a feeding mechanism, a first electromagnetic valve is installed at a discharging port in the bottom of the stock bin, the feeding mechanism comprises a conveying belt at the bottom of the stock bin and a feeding plate at a feeding port of the heating mechanism, isolation plates are distributed on the surface of the conveying belt at intervals, and the feeding plate is driven by an air cylinder on the body. According to the device, the problems of sintering agglomeration, cracks and the like of zirconium oxide in a traditional method are solved, the performance of the product is improved, and the application requirement for higher performance is met.

The invention provides a preparation method of silane modified hybrid polymer resin. The preparation method comprises the following steps: firstly, dehydrating polyether containing terminal hydroxyl groups; the preparation method comprises the following steps: firstly, dehydrating polyether containing terminal hydroxyl groups, then mixing silane containing isocyanate groups with dehydrated polyether containing terminal hydroxyl groups, and carrying out addition reaction on the isocyanate groups and the terminal hydroxyl groups under the action of a catalyst to generate silane modified hybrid polymer resin with a carbamate structure, and the molar ratio of the polyether containing terminal hydroxyl groups to the silane containing isocyanate groups is 1: (1.9-2.1). The invention further provides the silane modified hybrid polymer resin obtained according to the preparation method and application of the silane modified hybrid polymer resin.

The present application provides a kind of herbal shoe pad and its preparation method and application, the preparation method includes the following steps: herbal raw material is crushed to obtain herbal short hair, then mixed with chemical fiber, by air laying to obtain cotton-like mixture, then the upper and lower surfaces of cotton-like mixture are attached with non-woven fabric, and the herbal shoe pad is obtained after heat bonding.The herbal shoe pad provided by the present application can make the shoe pad more environmentally friendly in an industrial mass production mode, while also achieving the use of raw herbal state to absorb foot sweat, decompose and dilute odor, achieve uniform structure, controllable thickness, wear-resistant and usable through air laying and heat bonding, and have the characteristics of original ecology, high adsorption and easy degradation.

This utility model discloses a casting molding machine for preparing ceramic substrates, belonging to the field of ceramic casting molding technology. It includes a conveying assembly and a leveling assembly. The conveying assembly is used to convey ceramic slurry. The leveling assembly includes a scraper, a lifting frame, and a heating unit. The scraper is connected to the conveying assembly via the lifting frame, and the lifting frame can adjust the depth to which the scraper cuts into the ceramic slurry. The heating unit includes an electromagnetic heating plate connected to the scraper for uniformly heating and solidifying the ceramic slurry flowing through the scraper. This utility model can perform preliminary thermal solidification of the surface of the ceramic slurry, ensuring the uniformity of the ceramic substrate structure.

This invention discloses a fluorescence emission-independent excitation carbon quantum dots and its preparation method. The method includes: Step 1, mixing o-phenylenediamine and boric acid at a molar ratio of 4 mmol:(1.2~4 mmol), grinding the mixture, transferring it to a square ceramic boat, and placing it in an oven. Under air atmosphere, the temperature is increased from room temperature to 100~135℃ at a heating rate of 5℃ / min, and the solid-phase reaction is carried out for 4~6 h. The mixture is then naturally cooled to room temperature to obtain a brownish-red solid; Step 2, dissolving the brownish-red solid in deionized water and sonicating it to obtain a yellowish-brown liquid; Step 3, filtering the yellowish-brown liquid to obtain a pure carbon quantum dot aqueous solution; Step 4, freeze-drying the carbon quantum dot aqueous solution to obtain carbon quantum dot powder. This invention simplifies the process flow, reduces energy consumption and post-processing complexity, and provides controllable reaction process. The prepared carbon quantum dots exhibit fluorescence emission-independent characteristics and long-wavelength orange fluorescence.

The invention relates to a device and a method for tightly and efficiently arranging composite glass fibers, the device comprises a plate arranging mold, multifilament fibers are placed in the plate arranging mold, the plate arranging mold is placed on an electromagnetic vibration table, and the electromagnetic vibration table is connected with a controller. And a magnifying lens connected with the display screen is arranged above the plate arranging mold. The method comprises the steps that multifilament fibers are put into a plate arranging mold for blank plate arrangement, a controller is started when 4-6 layers are arranged every time, an electromagnetic vibration table is made to vibrate, the plate arranging mold is driven to vibrate up and down at the set frequency and amplitude for preset time, the multifilament fibers are vibrated at a certain frequency, the position is adjusted, and a close packing state is achieved; and the blank plate structure is displayed in real time through a display screen connected with the magnifying lens, after the current blank plate structure is adjusted, the controller is turned off, and the multifilament fiber row plate continues to be placed in. By means of the arrangement device and method, the phenomena of multifilament fiber dislocation and structure holing can be reduced, the internal cleanliness of the blank plate is improved, and the plate discharging efficiency is improved.

The application discloses white carbon black and a preparation method and application thereof, and the preparation method comprises the following steps: S1, silicon source pretreatment: mixing rice husk ash and a sodium hydroxide solution, reacting under the assistance of microwaves, adding a composite impurity removing agent for deep purification after filtration, and obtaining refined water glass solution; S2, modified precursor preparation: adding a composite modifier into the refined water glass solution, and obtaining a modified precursor solution; S3, high-pressure spray carbonization: atomizing the precursor solution, and reacting with mixed gas of CO2 and N2 in a high-pressure spray reaction tower to generate white carbon black slurry; S4, post-treatment: after washing and grinding, the white carbon black slurry is spray dried to obtain a finished product; and S5, waste liquid circulation: reacting the washing waste liquid with limestone, and recycling the alkali liquor for the step S1. The application realizes the recycling of waste resources; the product has high activation degree and excellent dispersibility, is applied to rubber reinforcement, improves processing performance, significantly enhances mechanical properties such as tensile strength, and has a good industrial application prospect.

The present disclosure provides a safe conductive coating slurry, a composite current collector and a preparation method thereof, and a battery, and belongs to the field of battery materials. The safe conductive coating slurry for the composite current collector comprises, in terms of mass fraction, 15-30 parts of a main material, the main material comprising microcrystalline glass; 10-30 parts of a binder; 10-20 parts of a solvent; 0.5-2 parts of a dispersing agent; 0.5-1 part of a wetting agent; and 0.5-1 part of a leveling agent. The coating slurry of the present disclosure comprises microcrystalline glass, which can simultaneously play the roles of a conductive coating and a safe coating by only coating one layer of coating, thereby simplifying the preparation process and the coating process; when combined with an electrode active material, the coating slurry does not cause the electrode active material to fall off; and the safe conductive coating has no cracking phenomenon. The technical problems of the prior art, such as the complexity of the slurry preparation process and the coating process when the two-layer structure of the conductive coating and the safe coating is coated on the composite current collector, the easy falling off of the electrode active material when combined with the electrode active material, and the easy cracking of the conductive coating, are avoided.

The invention provides a preparation method and application of a solid bonding lubricating protective coating for a high-end fastener, and belongs to the technical field of high-temperature protective coatings. The solid adhesive lubricating protective coating comprises the following raw materials in parts by mass: 5-15 parts of a ceramic precursor adhesive; 4-14 parts of a filler; the filler comprises a low-temperature section filler and a high-temperature section filler; 30-60 parts of a dispersion medium; and 0.1-1 part of an auxiliary agent. From a formula design source, namely aiming at core challenges of vibration relaxation, fretting wear, wide-temperature-range service and the like faced by high-end fasteners, the prepared coating is specially used for the fasteners, and the obtained coating realizes unification of strong adhesion, wide-temperature-range effective lubrication and excellent wear resistance and fretting resistance under the synergistic effect of a ceramic precursor adhesive and a filler. The locking torque of the solid bonding lubricating protective coating is 7.9-15 in.lb, and a cracking or falling phenomenon does not occur in a high and low temperature alternating cycle test.

The invention discloses a controllable thermal expansion preparation method of a graphene oxide layer. The controllable thermal expansion preparation method comprises the following steps: S1, preparing a modified graphene oxide precursor; s2, preparing a graphene oxide layer preform; s3, gradient heating controllable thermal expansion treatment is carried out; s4, post-treatment shaping is carried out; graphene oxide is modified through an amino silane coupling agent, amino functional groups are introduced, the interlayer acting force of graphene oxide is regulated and controlled, a precursor foundation is provided for subsequent controllable thermal expansion, and the problem that thermal expansion is uncontrollable due to the fact that the interlayer acting force of a traditional precursor is unstable is effectively solved; a gradient heating thermal expansion process is adopted, the heating rate and the constant temperature time are controlled in three stages, moisture removal, functional group decomposition and deep expansion are carried out in order, local excessive expansion or insufficient expansion caused by a single heating rate is avoided, and it is ensured that the graphene oxide layer expands uniformly and the pore structure is controllable.

This invention discloses a composite preform for aluminum-steel induction brazing, a welding method, and an anode guide rod assembly. The composite preform includes an aluminum base skeleton and annular brazing filler metal on its upper and lower surfaces. The aluminum base skeleton is disc-shaped with through holes, through which the annular brazing filler metal is connected as a whole. The annular brazing filler metal includes an inner ring wetting zone, a middle ring control zone, and an outer ring compensation zone, with the solid-liquid phase temperature of the brazing filler metal increasing sequentially in these three zones. During welding, a two-stage induction heating process is employed: first, the inner ring brazing filler metal is fully softened and spread in the central region; then, the outer ring brazing filler metal is completely melted and fed to the joint edge, while a controlled Fe-Al-Si reaction layer is formed at the steel-side interface through the middle ring control zone. This invention transforms the inherent radial temperature difference of induction heating into a step-by-step melting process window, simultaneously solving the problems of insufficient central spreading, edge brazing filler metal loss, and uncontrolled brittle phase at the interface. It is suitable for large-section connections between anode steel claws and aluminum guide rods in the electrolytic aluminum industry.

The application provides a wafer-level calcium fluoride micro-optical element processing method and relates to the technical field of micro-optical element processing.The method comprises the following steps: profile grinding is performed on the surface of a calcium fluoride wafer by using a profile grinding head, the surface profile of the profile grinding head is complementary to a target microstructure array, the profile grinding head has a tip corresponding to the sharp corner, and the tip of the profile grinding head can enter the sharp corner area; after grinding is completed, a magnetorheological fluid is supplied between the profile grinding head and the surface of the calcium fluoride wafer, the magnetorheological fluid forms a flexible ribbon through a magnetic field generated by a permanent magnet array embedded in the profile grinding head, the flexible ribbon is attached to the tip of the profile grinding head, and the sharp corner area is finely ground; the surface of the processed calcium fluoride wafer is irradiated by using a gas cluster ion beam; and profile polishing is performed by using a profile resin wheel with the aid of enzymatic hydrolysis; and the application can realize the unification of nanoscale high-frequency roughness and low-frequency surface shape fidelity, and finally, a near-zero-damage and super-smooth surface is obtained.

This invention discloses a gallium-lanthanum co-modified cobalt-iron bimetallic catalyst, its preparation method, and its application, comprising the following steps: S1. A mixed metal salt solution and a precipitant solution are added dropwise to a reactor in a co-current manner to react and obtain a solution containing a precipitate; the mixed metal salt solution contains soluble salts of cobalt, iron, gallium, and lanthanum; S2. The precipitate is aged, then separated, washed, dried, and finally calcined to obtain the gallium-lanthanum co-modified cobalt-iron bimetallic catalyst. This invention optimizes the electronic structure, surface adsorption sites, and oxygen vacancy concentration through Ga / La dual-auxiliary modification, increases CO non-dissociative adsorption sites, inhibits the formation of byproducts such as carbon dioxide and methane, strengthens C-C coupling and carbon chain growth, and significantly improves catalytic activity and C... 2+ Alcohol selectivity, higher alcohol yield, and catalytic stability.

The invention discloses a recycled concrete slope protection brick, and belongs to the technical field of slope protection bricks, the recycled concrete slope protection brick comprises a brick body, the brick body is formed by pressing and curing a recycled concrete raw material, a permeable vegetation structure is integrally formed on the brick body, the permeable vegetation structure comprises a first planting cavity and a second planting cavity, and a vegetation card is poured on one inner wall of the permeable vegetation structure; a receding groove is formed in the position, corresponding to the vegetation clamp, of the lower surface of the brick body, the lower end of the vegetation clamp extends into the receding groove, and the inner wall, opposite to the vegetation clamp, of the water-permeable vegetation structure is designed to be of a downwards-concave inclined face structure. The recycled coarse aggregate and the recycled fine aggregate which are prepared by crushing and screening construction waste are adopted as main raw materials, a large amount of construction solid waste can be consumed, natural gravel exploitation is reduced, energy consumption and environmental pollution are reduced, a large-volume water-permeable vegetation structure is integrated in the brick body, rapid infiltration of rainwater can be achieved, the elastic vegetation cards are embedded in the brick body, and the brick body can be recycled. When vegetation is planted, the vegetation can be automatically and elastically clamped, and the vegetation is prevented from being washed off by rainwater or water flow.

The invention relates to the technical field of texturing additives for monocrystalline silicon wafers, and discloses a texturing additive for a pyramid textured monocrystalline silicon wafer and a preparation method of the texturing additive. Comprising the following raw materials in parts by mass: 1-1.5 parts of organic sulfonate, 1-2 parts of a polyamine high-molecular compound, 1-2 parts of a high-molecular polymer, 0.5-1 part of a surfactant, 0.2-0.5 part of a composite additive and 90-110 parts of deionized water. The composite additive contains a large number of carboxyl groups, hydroxyl groups and amino groups, the adsorption performance of the texturing additive on the surface of the monocrystalline silicon wafer can be enhanced, then a uniform pyramid structure is formed, the reflectivity is reduced, and the contained modified nano titanium dioxide can form a nano composite film on the surface of the monocrystalline silicon wafer, so that the texturing effect is improved. And the surface roughness and the scattering effect are further improved.

The utility model relates to chemical vapor deposition technical field especially relates to a tray assembly for vapor deposition growth chamber, including shell, still include: air inlet portion, air inlet portion installs on the base of shell, transmission portion, transmission portion installs on air inlet portion and is located the inside of shell, through drive portion can drive hollow column rotation, and then through the gas injection hole can even gas injection in the shell, improved the uniformity of gas distribution in the shell, and then improved the uniformity of the film layer structure formed on the substrate, and rely on transmission portion can make the substrate autorotation, and then make the gas column swept in the gas injection hole in the substrate each surface area, through the uniform rotation of hollow column, can make the substrate keep uniform rotation, and then can make the gas column of gas injection hole whole and the contact time of each area of substrate surface, with it improved the uniformity of the film structure formed on the substrate surface, improved the film quality.