15results about How to "Uniform and stable" patented technology

The invention belongs to the technical field of grinding and polishing, and particularly relates to an aluminum nitride ceramic polishing process. The polishing process comprises the following steps that the aluminum nitride ceramic substrate is placed on a polishing pad, and polishing liquid is added for polishing; the polishing solution is prepared from the following components in parts by weight: 15-20 parts of a composite abrasive, 2-4 parts of an oxidant, 8-10 parts of a functional compound and 60-70 parts of water are mixed into a solution, and the pH value of the solution is adjusted to be 4-4.5 by using organic acid; the polishing solution provided by the invention has good suspension stability and antibacterial performance, the polishing solution is used for polishing the aluminum nitride ceramic substrate, the polishing rate is high, the polishing effect is good, and the aluminum nitride ceramic substrate which is small in surface roughness and free of scratches can be obtained.

This invention relates to the field of food preservation technology and discloses a liquid preservative for preserving fresh walnut kernels. The preservative comprises a natural preservative, a solubilizing and stabilizing agent, and a solvent. This liquid preservative uses natural phloretin as the preservative component, combined with Tween 80 as a solubilizing and stabilizing agent and ethanol as a solvent. This effectively solves the problems of poor water and oil solubility and inadequate stability of phloretin, allowing it to be stably dispersed in the preservative system and fully exert its antioxidant and antimicrobial effects. Furthermore, the preparation method is simple and easy to implement, and the production process is safe and controllable. It is convenient to use; the preservation of fresh walnut kernels can be achieved through dilution and soaking. The diluted solution can be reused, reducing usage costs. Simultaneously, it can inhibit bacterial growth during the storage of fresh walnut kernels, delay oxidative deterioration, maintain their good appearance and quality, extend shelf life, and meet the market demand for high-quality fresh walnut kernels.

The application relates to a spinning plate technical field, in particular to a high-performance carbon fiber spinning plate, which comprises an input pipe, the outside of the input pipe is fixedly connected with a forming pipe for high-performance carbon fiber spinning, a transmission assembly and a dredging assembly are arranged between the input pipe and the forming pipe; in an initial state, the transmission assembly blocks the channel between the input pipe and the forming pipe. The lifting ring structure controlled by the elastic telescopic rod is arranged, so that the channel between the input pipe and the forming pipe can be automatically opened and closed under the action of pressure, the first transverse channel, the annular channel and the second transverse channel are utilized to realize uniform shunt conveying of the molten material, the dredging assembly is in a standby state in a normal conveying state, and the spinning process is not affected; when the spinning hole is blocked to cause pressure rise, the lifting ring continues to move upwards and drives the gear and the gear wheel to engage, so that the plug and the dredging rod drive the spinning hole to reciprocating dredge, and the blockage can be removed without stopping.

The plastic packaging machine comprises a first plastic packaging mechanism, a second plastic packaging mechanism is arranged at the top of the first plastic packaging mechanism, a cleaning mechanism is arranged on the opposite sides of the first plastic packaging mechanism and the second plastic packaging mechanism, and a mounting frame is fixedly connected to the rear sides of the first plastic packaging mechanism and the second plastic packaging mechanism. The plastic packaging machine has the advantage that the plastic packaging mold is convenient to clean, and the problems that in the using process of an existing plastic packaging machine for battery chip processing, impurities remaining in the plastic packaging mold are inconvenient to clean, the impurities may cause bubbles and cavities to be generated in the filling process of a plastic packaging material, the defects may affect the integrity and sealing performance of packaging, and the packaging efficiency is poor are solved. And the performance and the reliability of the chip are further influenced.

The invention provides a modification method for strengthening the loading performance of a medical stone fungicide, and belongs to the technical field of water environment treatment and ecological restoration. The modification method comprises the steps of alkali activation treatment, surface modification treatment and microbial agent loading treatment. Through alkali activation treatment, the surface activity is improved; a surface modifier is used for modifying the medical stone, so that the combination effect of the modifier and the surface of the medical stone is optimized; the plant growth-promoting microbial inoculum is mixed with the medical stone subjected to surface modification treatment, and the microbial inoculum is uniformly loaded on the surface of the medical stone by utilizing an adsorption reaction, so that stable plant growth-promoting particles are formed. According to the method, the loading capacity of the microbial inoculum is improved, meanwhile, the stability and the long-term effect of the microbial inoculum can be remarkably improved, and the good ecological restoration effect is achieved. The technical scheme has the advantages of simplicity and convenience in operation, low cost, wide application range, environment friendliness and the like, and is suitable for large-scale ecological restoration and water treatment engineering.

The invention provides a composite belt and a preparation method and manufacturing equipment thereof. The lithium melt is conveyed to the die head through the melt conveying system under the protective atmosphere; the continuously conveyed base material is coated by the die head under the combined action of the protective gas and a stirring device in the die head; the composite belt with a continuous and uniform coating layer is successfully prepared through the further action of cooling shaping and a calendering mechanism; and the preparation of a plurality of coating layers can be simultaneously realized in the width direction of the base material. In addition, on the basis that continuity and uniformity are achieved, the minimum thickness of the composite belt can reach 0.1 micrometer. The first coulombic efficiency of the battery can be improved, the cycling stability of the battery is enhanced, and the service life of the battery is prolonged; and a more efficient and safer solution is provided for the preparation of the composite belt mainly comprising lithium and sodium in the battery.

The invention discloses a preparation method and application of a rare earth magnesium alloy surface micro-arc oxidation film layer manufactured through electric arc additive manufacturing, and relates to the technical field of additive manufacturing light metal surface treatment. The preparation method comprises the following steps: manufacturing a rare earth magnesium alloy through electric arc additive manufacturing; carrying out homogenizing heat treatment on the rare earth magnesium alloy subjected to electric arc additive manufacturing; performing earlier-stage treatment; preparing an inner-layer alkaline electrolyte and an outer-layer alkaline electrolyte; and step-type voltage micro-arc oxidation treatment: taking stainless steel as a cathode, taking the magnesium alloy as an anode, sequentially putting the stainless steel and the magnesium alloy into the inner-layer alkaline electrolyte and the outer-layer alkaline electrolyte for micro-arc oxidation, cleaning and drying to obtain a micro-arc oxidation film layer on the surface of the magnesium alloy. According to the preparation method, the problems that a traditional micro-arc oxidation coating is loose, porous, prone to corrosion and short in service life are solved, the corrosion resistance of the magnesium alloy is effectively improved, the magnesium alloy is prevented from volatilizing under the high-temperature condition, the working requirement of a satellite support in the space environment is met, and the application range of the magnesium alloy is widened.

The invention relates to the technical field of display materials, in particular to a blue dichroic dye and application thereof, the structural formula of the blue dichroic dye is as shown in formula I: # imgabs0 # L2-L1-* formula II, in the formula I, R1 is a structure shown in a formula II, and R2 is selected from C1-C20 alkyl groups, C6-C12 cycloalkyl groups, C1-C20 alkoxy groups, C6-C12 cycloalkoxy groups, C1-C20 alkylamino groups, substituted or unsubstituted C6-C50 aryl groups, substituted or unsubstituted C2-C50 heteroaryl groups, allyl groups, acyl groups, amino groups, C2-C10 acylamino groups and C2-C10 acyloxy groups. The blue dichroic dye disclosed by the invention is excellent in solubility and has excellent light transmittance in a visible light range, and the dichroic ratio in a blue main absorption wavelength range is further improved, so that higher color contrast and clearer display effect are realized.

This invention provides a method for dyeing with vat dyes in an overflow dyeing machine. The use of a dye premix significantly improves dyeing performance. The cationic properties of modified cationic starch electrostatically adsorb onto fabric fibers, allowing the coated dye particles to quickly and evenly adhere to the fabric surface. This avoids localized color differences caused by uneven dye dispersion in the dye bath, and the water flow impact in overflow dyeing prevents localized dye aggregation, effectively improving dyeing uniformity and ensuring consistent dyeing results for the same batch of fabrics. The stable structure formed by the cross-linking of modified cationic starch and vat dye forms a protective film on the fabric fiber surface after color fixation, enhancing the binding stability between the dye and fiber, reducing damage to dye molecules from external factors such as light, improving the dye's lightfastness and the fabric's sunlight fastness. Its film-forming properties also make the dye and fiber bond more firmly, preventing fading.

The invention provides a dry ice briquetting machine. The dry ice briquetting machine comprises an upper mold pressing mechanism, a lower mold thickness adjusting mechanism and a demolding mechanism. The upper die pressing mechanism comprises a base, an upper die and a pressing driving assembly, and the pressing driving assembly is erected on the base and connected with the upper die; the lower die thickness adjusting mechanism comprises a lower die, jacking dies, an upper sliding block, a middle sliding block, a lower sliding block and an adjusting bolt, the lower die is fixedly erected on the base and is provided with a plurality of forming cavities, the jacking dies penetrate through the forming cavities in a lifting sliding mode, the multiple jacking dies are borne on the upper sliding block, the lower sliding block is fixed to the base, and the adjusting bolt is fixed to the base. The middle sliding block is arranged between the upper sliding block and the lower sliding block in a sliding mode, the upper surface and the lower surface of the middle sliding block, the lower surface of the upper sliding block and the upper surface of the lower sliding block are slopes matched with one another, and the adjusting bolt is connected to the base and the middle sliding block. According to the dry ice briquetting machine, energy consumption and equipment cost can be reduced, and the service life of equipment is prolonged; and accurate adjustment of the thickness of the dry ice block body can be conveniently realized.

The invention discloses a preparation method of a skin-friendly soft foaming material. The preparation method comprises the following steps: 1, mixing an ethylene-vinyl acetate copolymer, a polyolefin elastomer, a hydrogenated styrene-butadiene block copolymer and naphthenic oil; step 2, adding an auxiliary agent and a cross-linking agent into a mixing product obtained in the step 1, and continuously mixing; 3, curing the mixed product in the step 2 to obtain a primary blank; 4, the primary blank obtained in the step 3 is placed in a supercritical fluid environment, the pressure is maintained for 2-5 min at the pressure of 0.8-1.2 MPa, then the pressure is increased to 15-18 MPa, and the pressure is maintained for 90-100 min; and 5, after the pressure maintaining in the step 4 is completed, the pressure is released to 0 within 10-13 s, and the foaming material is obtained after cooling. The foaming material prepared by the method has good skin-friendly performance.

The application discloses a method for preparing high-density single / dual-atom catalysts by using a stator-rotor reactor, which comprises the following steps: adding a metal salt into a solvent; adding 2-methyl imidazole into the solvent; mixing the two solutions to react, centrifuging and washing to obtain ZIF-8 slurry; preparing a Tris buffer solution and dispersing the ZIF-8 slurry in the Tris buffer solution; adding dopamine hydrochloride into the ZIF-8 / Tris suspension; preparing a single / dual-metal-ligand complex solution and mixing the complex solution with the ZIF-8 coating solution; standing and aging, and then centrifuging, washing and drying; performing programmed temperature rising; and finally obtaining high-density active site single / dual-atom catalysts. The single / dual-atom catalysts prepared by the method can greatly improve the density of active sites, solve the problems of insufficient active sites and poor accessibility of single / dual-atom catalysts, and thus greatly improve the performance of the single / dual-atom catalysts in fuel cells.

This invention discloses a method for preparing graphene-loaded iridium-ruthenium-cobalt-copper-nickel high-entropy nanoparticles. The method includes: dissolving iridium, ruthenium, cobalt, copper, and nickel metal salts in an equiatomic ratio to prepare a metal precursor solution; simultaneously preparing a graphene oxide dispersion; and then mixing and atomizing the dispersion using a dual-feed atomization drying device to obtain a composite precursor powder. Finally, the powder is subjected to microwave reduction under inert gas protection to obtain graphene-loaded iridium-ruthenium-cobalt-copper-nickel high-entropy nanoparticles. This invention employs a synergistic process of dual-feed atomization and microwave reduction, avoiding metal ion aggregation and elemental segregation, achieving uniform and stable loading of high-entropy nanoparticles on the graphene surface. The high-entropy nanoparticles have a single-phase face-centered cubic structure with a particle size of 8 nm to 25 nm. The process is simple, efficient, low-consumption, and allows for controllable proportions. The prepared graphene-loaded iridium-ruthenium-cobalt-copper-nickel high-entropy nanoparticles can be widely used in water electrolysis, exhibiting advantages such as low overpotential and high stability, making them suitable for large-scale production and industrial applications.

The present invention discloses a thin plate welding fixture, including a positioning frame, a fixing frame, a lifting device and a pressing bracket. The welding vertical plates can be clamped toward each other by two groups of positioning frames, and then the welding horizontal plate is placed on the top of the positioning frame and the positions of the welding horizontal plate and the welding vertical plate are adjusted, and the lifting device is controlled to press the pressing bracket against the surface of the welding horizontal plate, and the pressing round head is close to the actual heat-affected zone of the welding weld, and the pressing round head is pressed against the surface of the welding horizontal plate to form a point contact, and each pressing bracket is controlled by a lifting device separately, so that the pressure of each pressing bracket on the surface of the welding horizontal plate can be controlled separately, so as to keep the force of the welding horizontal plate uniform, and then ensure the force balance of the welding horizontal plate to prevent the welding horizontal plate from deforming. There is point contact between the pressing bracket and the welding horizontal plate, and the welding gun is welded through the upper surface of the welding horizontal plate toward the welding vertical plate, so that welding is convenient and the activity space is wider.

The application provides a kind of para-aramid nanofiber modified polytetrafluoroethylene glass fabric high-frequency copper-clad plate and a preparation method thereof, comprising the following steps: A) using silane coupling agent to modify the glass fabric, to obtain surface-modified glass fabric;B) the surface-modified glass fabric is immersed in aramid nanofiber modified polytetrafluoroethylene impregnating solution, and after taking out, drying to obtain impregnated glass fabric;C) the impregnated glass fabric is stacked in turn, and drying, impurity removal and sintering are carried out in turn under vacuum environment, to obtain a semi-cured sheet;D) the semi-cured sheet is covered with copper foil, and vacuum hot pressing treatment is carried out, to obtain a para-aramid nanofiber modified polytetrafluoroethylene glass fabric high-frequency copper-clad plate.The para-aramid nanofiber modified polytetrafluoroethylene glass fabric high-frequency copper-clad plate of the application has excellent dielectric properties, and the water absorption, peel strength, ultra-low loss, linear thermal expansion coefficient and other properties meet the index requirements of copper-clad polytetrafluoroethylene glass fabric laminated plate for microwave circuit.