22results about How to "Uniform and dense structure" patented technology

The invention discloses a surface passivating inert metal, a plating solution thereof and a passivating method, and belongs to the technical field of inert metal surface treatment. The plating solution comprises sulfydryl silane, amino silane, acid, deionized water and absolute ethyl alcohol. And the inert metal subjected to surface pretreatment is put into a plating solution to be subjected to electrolytic treatment and dipping treatment correspondingly, and then the inert metal with the silane composite passive film on the surface is obtained through stepped curing treatment. The plating solution is simple in component, stable in system and low in price; the preparation method of the plating solution is simple and easy to operate; the passivating treatment method is short in technological process and high in preparation efficiency; the prepared silane composite passivation film is uniform and compact in structure, colorless and transparent, can keep good gloss of the inert metal surface, and has excellent properties such as oxidation resistance, corrosion resistance and insulation.

The invention relates to the technical field of electronic polishing materials, in particular to a preparation method of agglomerated diamond, which comprises the following steps: firstly, etching diamond micro-powder through nickel powder, and then respectively carrying out surface treatment on the diamond micro-powder through tetraethoxysilane and zinc nitrate; the preparation method comprises the following steps: preparing silanized diamond micro-powder with a silicon dioxide coating adsorbed on the surface and coated diamond micro-powder with zinc oxide coated on the surface, adding the silanized diamond micro-powder and the coated diamond micro-powder into diamond micro-powder, and combining with a ceramic bond and polyvinyl alcohol to prepare agglomerated diamond; the wear resistance, the bonding strength and the oxidation resistance of the agglomerated diamond can be improved; the diamond micro-powder is etched through the nickel powder, microstructure changes or defects can be introduced to the surface of the diamond micro-powder, a subsequent surface treating agent can be better attached to the diamond micro-powder, the surface area of the diamond micro-powder can be increased through etching treatment, and therefore the binding capacity of the etched diamond micro-powder and other substances is improved.

The invention discloses a method for recovering dimethyl ether from dimethyl ether purge gas, and belongs to the technical field of dimethyl ether recovery, the method for recovering dimethyl ether from dimethyl ether purge gas comprises the following steps: cooling the dimethyl ether purge gas to 8-10 DEG C through heat exchange of a heat exchanger, and then discharging to obtain low-temperature purge gas, the low-temperature purge gas enters the bottom of the inner side of an absorption tower filled with composite filler and is absorbed by absorption liquid which flows from top to bottom and has the temperature of 10-15 DEG C, and enriched liquid is formed at the bottom of the absorption tower; according to the method, the composition and the adsorption temperature of the adsorption liquid are optimized, and the composite filler is modified, so that the recovery purity of the dimethyl ether is effectively improved, and the recovery rate of the dimethyl ether in the purge gas is also improved.

The invention relates to the technical field of food gel, in particular to bamboo shoot insoluble dietary fiber, pea protein and alginate ternary composite hydrogel as well as a preparation method and application thereof. By adjusting the pH value of a reaction system (a pH driving method) and introducing the insoluble dietary fibers into the binary gel, the use of a chemical cross-linking agent is reduced, and the property of the hydrogel is improved. The finally obtained hydrogel has the following advantages: the structure becomes more compact and uniform, and the deformability is also reduced; the mechanical strength is good, and possibility is provided for encapsulation of bioactive molecules; higher thermal stability is shown; the crystallinity is higher, and the mechanical strength and the functional stability are improved; the water retention capability of a gel network in the structure can be enhanced, and the porous structure is beneficial to stabilizing water molecules.

The invention discloses a damaged carton recycling device and method for carton packaging, and relates to the technical field of waste recycling, the damaged carton recycling device comprises a shell, two door bodies rotationally installed on the shell, a control module fixedly installed outside the shell and a data display module, the compaction assembly is mounted in the shell; the hydraulic rod is fixedly mounted at the top of the shell; and the compaction assembly comprises a bottom plate fixedly mounted at the bottom of the shell and an extrusion plate slidably mounted in the shell, a connecting sleeve is fixedly mounted on the extrusion plate, and the driving end of the hydraulic rod is fixedly connected with the connecting sleeve. The carton compacting device has the advantages that in the carton compacting process, through pressure equalizing and buffering of the pressure buffering assembly, negative pressure air exhaust gap discharging and resistance reducing, lateral protection restraining deformation and repeated tamping successive exhaust plastic deformation, the interlayer fitting degree and uniformity of paperboards can be synergistically improved, and the higher compression ratio and the lower rebound rate are achieved.

The invention discloses a carbon brick for an Acheson graphitization furnace and a preparation method of the carbon brick, and belongs to the technical field of graphitization furnace production. The raw materials for preparing the effective components of the carbon brick comprise the following components in parts by weight: 38-50 parts of coal with the particle size of 0.15-3mm, 15-27 parts of coal with the particle size of less than 0.15 mm, 2-8 parts of boric oxide, 2-8 parts of carbon black and 15-30 parts of a binder. Compared with a granular resistance material, the carbon brick disclosed by the invention is more compact and uniform in structure, and more uniform and stable in provided heat; and the resistance performance and the structure are stable, the repeated utilization rate is high, and the production cost is greatly reduced. The method is suitable for the Acheson graphitization furnace to produce graphitized materials.

This invention discloses a highly hydrophilic organic solvent reverse osmosis membrane, its preparation method, and its applications. The organic solvent reverse osmosis membrane comprises a cross-linked polyimide porous support layer, a polyamide separation layer, and a surface grafting layer. The surface grafting layer is formed by the amidation reaction of D-glucosamine with residual acyl chloride groups on the surface of the polyamide separation layer via its primary amino group. This invention utilizes a D-glucosamine / ethanol solution to modify the surface of the nascent polyamide membrane, grafting D-glucosamine through a secondary interfacial reaction to avoid hydrolysis of residual acyl chloride groups, while simultaneously introducing a large number of hydroxyl groups onto the membrane surface. The prepared membrane exhibits significantly enhanced hydrophilicity, greatly increasing the permeation flux of polar organic solvents while maintaining a high solute rejection rate. The preparation method of this invention is simple, low-cost, and easy to scale up, showing broad application prospects in the field of polar organic solvent separation and recovery.

This utility model discloses a concrete pipe pile molding mold with a biodegradable release agent, belonging to the field of mold technology. It includes a shell with an upper plate at the top of its outer surface. A rotating wheel is inserted inside the shell, and a knob is installed at the top of the outer surface of the rotating wheel. A connecting block is sleeved inside the outer surface of the rotating wheel. The mold employs a precise temperature control system using heating wires, allowing the curing temperature to be set according to the concrete characteristics. This avoids gas expansion caused by high temperatures, reducing porosity at the source and ensuring a uniform and dense internal structure of the concrete. A vacuum pump at the top of the housing, along with valves and air pipes, actively extracts air from the pipe during concrete pouring, eliminating internal air bubbles and improving concrete density and waterproof sealing performance. Furthermore, the mold's wear-resistant protective layer and heat-insulating buffer layer effectively extend its service life and maintain stable curing temperature, providing a reliable guarantee for the production of high-performance concrete pipe piles.

The utility model discloses a kind of rubber extruding machine shaping mechanism, comprising: mechanism base, mechanism shell and warming hot melting bin;The utility model relates to the technical field of rubber processing equipment, and the present mechanism is accurately temperature-controlled to rubber particles by convolute heating coupling structure: after melting by warming hot melting bin, it will be stably transported to the opposite covering bin, and then symmetrical supporting covering structure is uniformly pressed by lateral, so that rubber material in flowing state always maintains stable wrapping state in shaping process, effectively avoids material overflow, this bidirectional collaborative design realizes three major advantages: first, rubber product internal structure is more dense uniform;Second, it can satisfy high-precision size requirement and other special process standards, and finally the shaping effect is significantly better than similar equipment on market, especially suitable for the rubber product production scene with strict uniformity requirement.

The present invention belongs to the technical field of hot-dip galvanized steel strip processing, and discloses a composite coating for hot-dip galvanized sinking rollers, and a preparation method and application thereof. The preparation method of the composite coating comprises the following steps: S1, spraying tantalum on the surface of a metal substrate by cold spraying to form a transition layer; S2, spraying a mixed metal powder and tungsten carbide powder by cold spraying on the side of the transition layer away from the metal substrate to form a functional layer, thereby preparing the composite coating; wherein the mixed metal powder comprises tantalum, niobium and titanium. The composite coating provided by the present invention has nano-embedded packaging, low porosity, uniform and dense structure, excellent wear resistance and corrosion resistance, and can be well applied to hot-dip galvanizing equipment as a good corrosion-resistant coating.

The invention relates to the technical field of piezoelectric ceramic materials, and particularly discloses a composite high-temperature piezoelectric ceramic material and a preparation method thereof, the chemical general formula of the composite high-temperature piezoelectric ceramic material is Bi < 0.5-x > [Mn < 0.25 > Sn < 0.5 > Pr < 0.25 >] < x > Na < 0.5 > TiO < 3 + a >% WO < 3 + b >% ZnSO4, the components and proportion of the base material are adjusted and optimized, meanwhile, WO3 and ZnSO4 with specific content are adopted as additives, the piezoelectric activity and thermal stability of the piezoelectric ceramic can be improved, functional filler is added in the preparation process, sintering efficiency is improved, the ceramic material forms a more compact crystal structure, and the piezoelectric ceramic has a good application prospect. The strength and the toughness of the ceramic material are enhanced. The composite high-temperature piezoelectric ceramic material has high Curie temperature and high piezoelectric activity, and the application range of the piezoelectric ceramic material can be effectively widened.

The invention discloses a high-strength plant cellulose-based composite paperboard and a preparation method thereof, belongs to the technical field of paperboard materials, and aims to solve the technical problem that the strength and wet strength retention rate of a plant fiber-based composite paperboard in the prior art need to be further improved. The composite plant fiber layer is composed of a plant fiber layer and interface layers arranged on the two sides of the plant fiber layer in a modifying mode. A plant fiber layer is prepared through CMC modified plant cellulose, a PEG modified inorganic reinforcing agent and a bio-based toughening agent reinforced plant fiber, a composite structure of an interface layer, a fiber layer and an interface layer is formed by arranging a double-interface layer containing lignin nano particles / carboxylated nano cellulose, and a hot-pressing curing process is combined, so that the lignin / carboxylated nano cellulose composite fiber is prepared. The strength and toughness of the plant fiber-based composite paperboard are effectively improved, and the wet strength retention rate of the material is also effectively improved.

The invention relates to the technical field of metal material surface treatment, in particular to an aluminum alloy chemical zinc depositing agent and a zinc depositing method. The problems that in the prior art, a zinc deposition aluminum alloy is poor in bonding capacity and insufficient in corrosion resistance are solved. The chemical zinc depositing agent comprises metal salts such as zinc salt, cobalt salt and the like, a complexing agent, a stabilizer, alkali and a mixed solvent. The deposited zinc-aluminum alloy is obtained by performing oil removal and alkali corrosion on an aluminum alloy matrix, and performing primary zinc depositing, zinc stripping, secondary zinc depositing and washing by using the chemical zinc depositing agent; by controlling the dosage of the complexing agent and the dosage ratio of all the components, the zinc deposition rate is increased; the zinc deposition thickness is increased by adjusting the type and dosage of zinc salt; by adjusting the type and dosage of cobalt salt and controlling the type and dosage of a stabilizer, the binding capacity of a deposited zinc layer and an aluminum alloy matrix is improved; the overall corrosion resistance of the deposited zinc-aluminum alloy is improved by adjusting the temperature, time and zinc depositing agent of primary zinc depositing and secondary zinc depositing.

The invention belongs to the technical field of vertical barrier materials, and particularly relates to a vertical antifouling barrier material and a preparation method and application thereof.The antifouling barrier material is prepared from, by mass, 10-15 parts of bentonite, 3-15 parts of gelling agent and 70-87 parts of in-situ soil, the gelling agent is prepared from activated red mud, blast furnace slag powder, silica fume and water glass, and the water glass is prepared from sodium silicate, sodium silicate and sodium silicate. By replacing cement with the gelling agent component, the adsorption capacity, the pollutant intercepting capacity and the early strength of the vertical antifouling barrier material are improved, a low-permeability antifouling barrier can be formed in a high-concentration organic pollution solution and a heavy metal pollution solution, pollutants are prevented from horizontally migrating along with underground water, and the pollution resistance of the vertical antifouling barrier material is improved. And thus, effective isolation management and control of the polluted site are realized. The vertical antifouling barrier material provided by the invention can be applied to a polluted site in which the underground water heavy metal concentration is greater than or equal to 20mg / L or the organic matter concentration is greater than or equal to 400mu g / L.

The present invention relates to the technical field of metal material surface treatment, specifically to a chemical zinc deposition agent and zinc deposition method for aluminum alloy. The present invention overcomes the problems of poor bonding ability and insufficient corrosion resistance of zinc-deposited aluminum alloy in the prior art. The chemical zinc deposition agent of the present invention comprises metal salts such as zinc salts and cobalt salts, a complexing agent, a stabilizer, an alkali and a mixed solvent. The deposited zinc-aluminum alloy is obtained by degreasing and alkali etching the aluminum alloy substrate, using the chemical zinc deposition agent for primary zinc deposition, zinc stripping, secondary zinc deposition, and washing; the zinc deposition rate is increased by controlling the amount of the complexing agent and the ratio of each component; the zinc deposition thickness is increased by adjusting the type and amount of the zinc salt; the bonding ability of the deposited zinc layer with the aluminum alloy substrate is improved by adjusting the type and amount of the cobalt salt, controlling the type and amount of the stabilizer; and the overall corrosion resistance of the deposited zinc-aluminum alloy is improved by adjusting the temperature, time and zinc deposition agent of the primary zinc deposition and the secondary zinc deposition.

The invention discloses a preparation method of a wear-resistant lubricating film layer of an aviation shaft part. The preparation method comprises the following steps: finishing the surface of the aviation shaft part; cleaning greasy dirt on the surface of the part; a protection tool is used for shielding the surface of the part without film deposition; hanging the part to a hearth of vacuum coating equipment; preparing a NiCr, Cr and W metal adhesion layer on the surface of the undercarriage by magnetron sputtering; preparing a diamond-like carbon film layer on the metal adhesion layer by using acetylene by using a plasma enhanced chemical vapor deposition method; the diamond-like carbon film layer has a gradient transition structure of NiCr, a NiCr / Cr mixed layer, a Cr / W mixed layer, a W / Cr mixed layer and a DLC functional layer, the prepared diamond-like carbon film layer is uniform, compact, excellent in wear resistance and high in controllability of the technological process, the thickness of the film layer is 3-6 microns, the hardness reaches HV2000 or above, the friction coefficient is lower than 0.2, and the diamond-like carbon film layer is suitable for being used as a high-temperature-resistant coating. And the use requirements of wear resistance and lubrication of shaft parts are met.

The invention provides a preparation process of a ceramic grinding ball for grinding a battery raw material. The process comprises the following steps: forming a gel system by adopting non-toxic water-borne epoxy resin and water-dispersible polyamine, taking water as a solvent, preparing uniform slurry from ceramic powder, a dispersing agent and the like, performing vacuum defoaming, injecting the slurry into a silicon rubber spherical mold, performing gel curing under mild conditions, drying, and performing program control sintering, thereby finally obtaining the ceramic grinding ball. The ceramic powder is aluminum oxide, zirconium oxide toughened aluminum oxide or aluminum oxide toughened zirconium oxide ceramic powder. Near-net-size forming of the ceramic grinding ball is achieved, the sphericity degree of a green body is good, the surface is smooth and clean, and post-processing is greatly reduced. The process is non-toxic and environment-friendly, contact with metal equipment is avoided, and the metal impurity pollution risk of the product is remarkably reduced. The obtained ceramic grinding ball is high in density, the performance reaches the traditional compression molding level, and the ceramic grinding ball is particularly suitable for the field of high-purity battery material grinding and grinding of other materials sensitive to metal impurities.

The invention relates to the technical field of new materials, in particular to biodegradable filter cloth and a preparation method thereof.The biodegradable filter cloth is prepared from, by weight, polybutylene terephthalate, modified starch, polybutylene adipate, bamboo fibers, maleic anhydride grafted polyolefin elastomer and a lubricant; through the synergistic effect of all the components and the preparation process, the performance of the filter cloth can be optimized, the component compatibility problem is solved through cooperation of the modified starch and the compatilizer, the uniformity and compactness of the material structure are guaranteed through the bamboo fiber pretreatment and gradient melting process, the pore characteristics of the filter cloth are optimized through the segmented spinning and weaving process, and the filter cloth has the advantages of being high in practicability and high in practicability. Finally, the filter cloth simultaneously has excellent mechanical properties, efficient filtering performance and good biodegradability, is suitable for industrial production, and has wide application prospects in the fields of industrial filtration, environment-friendly treatment and the like.

The present application relates to the technical field of semiconductor packaging materials, in particular to a liquid plastic packaging material for MiniLED with high light transmission and low stress and a preparation method thereof.The liquid plastic packaging material comprises the following components: vinyl MQ silicone resin, phenyl hydrogen-containing silicone resin, hydrogen-containing silicone oil, silicone epoxy resin, platinum gold catalyst, ethynyl cyclohexanol, epoxy group-containing silane coupling agent, silicone defoaming agent, fumed silica and phenyl vinyl silicone resin;the fumed silica is dried, then ground with part of the base resin to form a master batch, and then mixed with the remaining components to remove bubbles to obtain a liquid component;the catalyst and the inhibitor are respectively diluted into a premix, and then mixed in sequence and deaerated again before use.The present application realizes the extreme uniform dispersion of fumed silica and the precise release of stress by constructing a multiple crosslinking network and a double crosslinking system, combining the interface compatibilization effect and the gradient curing process, and solves the technical problem that high light transmission and low stress are difficult to be considered simultaneously.

The invention discloses a method for preparing a barium titanate functional coating by a one-step method, which comprises the following steps of: 1, adding barium hydroxide octahydrate serving as a barium source into excessive glacial acetic acid, heating in a constant-temperature water bath, stirring until the solution is clear and transparent, and cooling to room temperature to obtain a solution A with the pH value of 5.0-6.8; 2, adding tetrabutyl titanate serving as a titanium source into absolute ethyl alcohol, and uniformly stirring to obtain a solution B; 3, dropwise adding the solution B into the solution A in a room-temperature stirring state; after the solution B is dropwise added, continuously stirring, mixing and aging to obtain a barium titanate precursor solution; fourthly, the metal material serves as a base body and is pretreated, and a pretreated base body is obtained; and (5) spraying the barium titanate precursor solution obtained in the step (3) onto a pretreated substrate through a solution plasma spraying process to prepare the barium titanate functional coating. The method is simple in process, and the obtained coating is uniform in component and has certain density and dielectric property while having relatively good hardness.

The present invention belongs to the field of fiber technology, specifically, a mulberry bark cellulose fiber and a preparation method thereof. The present invention forms a uniform cross-linked structure inside the mulberry bark by first adding the mulberry bark after scouring and washing into a permeate for soaking, and then adding it into a phosphate buffer for modification reaction, so as to play a filling and strengthening role; there is a hydrogen bond force between the cross-linked structure and the cellulose macromolecules in the mulberry bark, the overall strength of the fiber is increased, and the strength unevenness rate is greatly reduced. The mulberry bark cellulose fiber prepared by the present invention has a length of 34-38 mm, a fineness of 1.33-2.22 dtex, good uniformity of a single fiber, and a linear density variation coefficient of less than 3%; the surface is smooth and soft to the touch, and the average roughness is 311-323 nm; the mechanical properties are excellent, the breaking strength is 12.28-13.74 CN / dtex, the breaking elongation is 20.3-22.6%, and the strength unevenness rate is less than 1%.

The utility model provides a variable load rubber wheel compaction module applied to snowfield working conditions, which comprises a compaction rubber wheel group and a first load unit, the first load unit comprises a frame and a counterweight loaded in the frame, and the outer side of the frame is provided with a connecting frame assembly; a balance weight cavity and a filling cavity are formed in the frame, the first traction assembly comprises a first lock hook with one end hinged to the dragging device through a longitudinal pin shaft and a first traction frame fixed to the front side of the frame, and a first trunnion rotating along the axis of the first traction frame is arranged in the middle of the first traction frame. The first trunnion is hinged to the other end of the first lock hook through a pin shaft. The utility model has the beneficial effects that the rubber wheel group is used as a snow pressing device, gaps among ice and snow particles are compressed from all directions, a uniform and dense structure is further formed, and various mechanical properties of a compacted snow layer are enhanced. A rotational degree of freedom around the axes of the trunnions is released on the trunnions of the front traction frame and the rear traction frame so as to adapt to the operation working condition that the rubber wheel compaction module is uneven left and right.