61results about How to "Dense particles" patented technology

The invention provides a coking-resistant hydrocarbon cracking furnace pipe and a preparation method thereof. A cracking furnace pipe is subjected to two-stage high-temperature heat treatment in a H2- and vapor-containing low-oxygen partial pressure gas atmosphere so that a manganese-chromium spinel coating is formed on the inner surface. In the first-stage high-temperature heat treatment, a mole ratio of H2 to vapor is in a range of 1792-107 and in the second-stage high-temperature heat treatment, a mole ratio of H2 to vapor is in a range of 1-1791. The manganese-chromium spinel has a structural formula of MnxCr3-xO4 and x is in a range of 0.5-1.5. The manganese-chromium spinel coating reduces deposition of coke on the inner wall of a radiation-section furnace pipe in hydrocarbon cracking and prolongs an operation period and a use life of the furnace pipe.

The invention provides a low-temperature thermal control phase change microcapsule and a preparation method thereof. The low-temperature thermal control phase change microcapsule takes paraffin alkane as a core material and urea resin as a shell, and further comprises a heat conduction filler, the heat conduction filler is added in the process of coating the paraffin alkane by the urea resin, and the amount of the added heat conduction filler is 5%-30% that of the paraffin alkane. The low-temperature thermal control phase change microcapsule prepared by the invention is solid-solid phase change, the problems of fusion flowing and permeation migration are avoided, the range of phase change temperature is wide, the latent heat is large, the condensate depression is small, the phase change process is stable, the phase change is reversible, the material further has a higher heat conduction property, and as a relatively ideal thermal control phase change material, the low-temperature thermal control phase change microcapsule can be widely used in the fields of thermal protection, like aerospace, precise instruments, and electron devices.

The invention relates to a spherical rhenium powder preparation method. The spherical rhenium powder preparation method is used for preparing spherical rhenium powder with the particle size ranging from 10 microns to 100 microns. According to the spherical rhenium powder prepared through the method, a small number of holes are formed inside a powder body, the content of hollow spheres is low, theapparent density is high, and powder compactness is good. According to the method, the plasma spherizing process is optimized, losses of the minute powder are reduced, and the yield of the spherical rhenium powder is increased.

The invention relates to a telescopic compound fertilizer rotary drum granulator comprising a support (1), a feeding port (2), a supporting wheel (4), a frame (8), and a discharging port (9). The frame (8) is provided with an inner cylinder (7) and an outer cylinder (6) sleeved on the inner cylinder (7), wherein the rotation directions of the inner cylinder (7) and the outer cylinder (6) are the same, but the rotation speeds of the inner cylinder (7) and the outer cylinder (6) are different. Granulating rods (3) are distributed in a threaded form on the outer wall of the inner cylinder (7). The inner cylinder (7) is arranged on the support (1) through a shaft, wherein the cylinder (7) can rotate. The outer cylinder (6) is arranged on the frame (8) through the supporting wheel (4). The feeding port (2) is arranged on one end of the outer cylinder (6), and the discharging port (9) is arranged on the other end of the outer cylinder (6). Compared to existing technologies, the granulator provided by the invention is advantaged in small volume, simple structure, high granulating rate, and no restriction on raw material performance. With the telescopic compound fertilizer rotary drum granulator provided by the invention, materials with any formula can be produced.

The invention discloses a manufacturing method of codonopsis lanceolata stem leaf pellet feed. Stem leaves of perennial sprawl herbaceous plant codonopsis lanceolat, high-yield and high-quality vegetable pumpkin and mater convolvulus, auxiliary green red pepper and corns are adopted to undergo the process of raw material pretreatment, steaming processing pulping, burdening, pelleting and drying and the like, so that the daily feed which is rich in chlorophyll, pectin, vegetable protein and various vitamins and the like, promotes appetite and salivary secretion, enhances appetite and is nutritious, hygienic and suitable for poultry and fattening pigs is made. The finished product feed contains rich tough fibers, is compact in particles and good in palatability, has the effects of clearing heat and cooling blood, detoxicating and curing sore, loosening the bowel to relieve constipation and the like, and has good prevention and therapeutic effects on dysentery, lung abscess and intestinal dryness with constipation and the like which occur commonly in livestock.

The invention discloses a testing device for inducing a calcium carbonate precipitation to solidify sandy soil by microorganisms in a negative pressure environment. The testing device comprises a culture box, an oxygen conveying device and a vacuumizing device. The invention further discloses a testing method for inducing the calcium carbonate precipitation to solidify the sandy soil by the microorganisms in the negative pressure environment. The method comprises the steps of manufacturing a sandy soil test piece, preparing a nutrient solution, mixing bacteria and the nutrient solution, debugging a culture environment, maintaining the aerobic negative pressure environment and the like. The disclosed testing method explores that under a negative pressure condition, along with the progressive increase of maintaining time, a rapid increased tendency appears in the strength of inducing the calcium carbonate precipitation to solidify the sandy soil by the microorganisms, and is superior tothe sand solidifying effect in a normal atmospheric pressure environment. The method has remarkable guiding significance in the actual application of negative pressure environmental engineering.

The present invention provides a film-base electric device comprising an electronic conductive metal organic frameworks (EC-MOFs) film. The EC-MOFs film is used as the active layer of the electric device. The electric device also includes more than two electrodes. At least one of the more than two electrodes is disposed on the EC-MOFs film or the more than two electrodes are disposed under the EC-MOF film. The EC-MOFs film of the present invention is applied to a room temperature chemical resistance type gas sensor with high selectivity and fast response, and has good effects.

The invention belongs to the field of photoelectric materials, and provides a preparation method of an ITO thin film. The preparation method of the ITO thin film comprises the following steps that an indium source and a tin source are dissolved to prepare an indium source and tin source mixture organic solution, stabilizers and surfactants are added for ageing processing, and then ITO sol is obtained; after one time of pulling coating is conducted on the ITO solution on a base body, high-temperature preheating processing is conducted, then annealing processing is conducted, and the ITO thin film is obtained. The high-temperature preheating processing method comprises the step of preheating the base body coated with the ITO solution for 30 min in a muffle furnace at the temperature of 400-600 DEG C in the air atmosphere. According to the preparation method of the ITO thin film, the ITO thin film is prepared by the adoption of the sol-gel dip-coating technology. The preparation method is simple, the doping amount is easy to control, the obtained ITO thin film is flat in surface and compact in particle, the transmittance in the visible light region of the obtained ITO thin film reaches 90%, the electrical resistivity of the obtained ITO thin film reaches 4-10 levels, the power function of the obtained ITO thin film reaches 4.9 eV, and the requirement for thin film electrodes of solar cells can be met.

The invention belongs to the technical field of electroplating, and particularly relates to a bright black nickel electroplating solution, a preparation method thereof, an electroplated part and an electroplating method of bright black nickel. The bright black nickel electroplating solution preparation method comprises the following steps that 1) under the condition that the temperature is 35-55 DEG C, every 5-25g of chitosan nickel complexes is dissolved in 1L of an additive A solution with the concentration of 10-45g/L; 2) 25-105g of nickel sulfates, 15-75g of nickel chlorides, 1-3g of magnesium sulfates, 2-10g of copper sulfates and 10-55g of ammonium thiocyanates are added into the solution sequentially and stirred until all the salts are completely dissolved; 3) 25-55g of additives Bare added and stirred until the additives B are completely dissolved; and 4) 20-65g of additives C and 1-6g of additives D are further added and stirred until the additives C and the additives D are completely dissolved, and the solution becomes a transparent or semitransparent solution and then is cooled to the room temperature. A bright black nickel coating prepared with the bright black nickelelectroplating solution has the advantages of being bright, compact, wear-resistant, corrosion-resistant, good in electrical conductivity and the like; and a coating crystal structure is uniform in grain size, stable in chemical composition and capable of being regulated and controlled.

The invention discloses a preparation device of a high-tap-density ternary precursor material, which comprises a seed crystal reaction kettle (1), a thickener (7) and a seed crystal tank (8), the seed crystal reaction kettle is respectively connected with the thickener and the seed crystal tank, and a pipeline connected between the seed crystal reaction kettle and the seed crystal tank is connected with the thickener; a stirrer (2) and a baffle (5) are arranged in the seed crystal reaction kettle, and a guide cylinder (3) is arranged on the inner wall of the seed crystal reaction kettle (1). The preparation method comprises the following steps: preparing a mixed sulfate solution of nickel, cobalt and manganese; preparing a base solution and introducing protective gas; adding a mixed sulfate solution, industrial liquid alkali and ammonia water to the height of an upper-layer paddle, and starting a stirrer; extracting supernate by the thickener, returning the supernate to the seed crystal reaction kettle, and overflowing the supernate to the seed crystal tank; and introducing seed crystal particles into the seed crystal reaction kettle for continuous reaction to obtain a material with a target particle size, and treating the material to obtain the high-tap-density ternary precursor material. The prepared material is high in tap density and good in particle uniformity.

The invention discloses easily formed biomass fuel, and relates to the technical field of fuel. The easily formed biomass fuel is prepared from the following raw materials in percentage by weight: 50-60% of ramulus mori, 30-40% of rice husk, 5% of high clay and 5% of a biomass combustion-supporting adhesive. Biomass granular fuel is prepared through procedures of crushing, drying, compression, screening, cooling and packaging. The high clay comprises 50-60% of silicon, 20-30% of aluminum oxide and 0.15-0.2% of iron. The mixed biomass granular fuel is dried, and the moisture content is up to 10-13%. By adopting the easily prepared biomass fuel, the problems that biomass fuel is single in component, the raw material processing yield is low and the formation rate is low are solved, the environment pollution caused by discarded or combusted ramulus mori is avoided as the ramulus mori and the rich husk are adopted as raw materials for preparing the biological fuel, new energy is developed, and the easily formed biomass fuel is an important method for increasing the income of farmers.

The invention discloses a preparation method for a spherical monocrystal tungsten powder for thermal spraying. The preparation method comprises the following steps: firstly adding a certain amount of a mixture of lithium carbonate and sodium chloride in an ammonium tungstate solution as a mother solution, and concentrating to obtain a precursor through heating drying; then selecting a spherical tungsten powder as a mother crystal, adding the spherical tungsten powder in the precursor according to a certain ratio, uniformly mixing, and then placing the mixture in a tubular reduction furnace and carrying out hydrogen gas reduction, and then sequentially carrying out ultrasonic cleaning, vacuum drying and grinding spheroidization to prepare an intermediate; and carrying out airflow classification on the prepared intermediate to obtain the spherical monocrystal tungsten powder. The preparation method disclosed by the invention is simple in process equipment and high in production efficiency; and the prepared spherical monocrystal tungsten powder has a perfect crystal, compact particles, a high sphericity degree, high flowability, a high purity, a high coating hardness, a high powder-applying rate and a low porosity.

The invention discloses a CeO2-based composite solid electrolyte material and a preparation method thereof. The structural general formula of the CeO2-based composite solid electrolyte material is asfollows: Ce0.8Pr0.1La0.1O2-delta.x(Li0.5K0.5Cl), and delta is oxygen deficit. The Ce0.8Pr0.1La0.1O2-delta material is doped with a specific low-melting-point salt Li0.5K0.5Cl through a microwave combustion-supporting method, the CeO2-based solid composite electrolyte material is formed, the conductivity of the material in medium and low temperature stages can be greatly improved, the electrochemical performance of the material is improved, and the method is simple in preparation process, low in cost, quick, energy-saving and environment-friendly.

The invention relates to the field of electrochemical technologies, in particular to a nickel-cobalt-aluminum hydroxide precursor, a preparation method thereof, an anode material and a battery. The preparation method of the nickel-cobalt-aluminum hydroxide precursor comprises the steps that a surfactant is added into a reaction system of a chemical coprecipitation method for modification, growth of particles of the nickel-cobalt-aluminum hydroxide precursor is promoted, and the form of the nickel-cobalt-aluminum hydroxide precursor tends to be spherical. According to the preparation method, byadding the surfactant during chemical coprecipitation, size increase of the particles, particularly first-time particles, is benefited, granularity is uniform, the form tends to be spherical, variousactive groups exist on the organization structure of the nickel-cobalt-aluminum hydroxide precursor, therefore, metal ions are chelated or adsorbed, or crystals can grow directionally or generate hydrogen-bond interaction with other compounds. As a result, the material structure is more complete, the degree of crystallinity is higher, and the electrochemical performance of the precursor is improved.

The The invention relates to the technical field of subgrade engineering, and particularly discloses a sandy silt subgrade filling construction method and application thereof. According to the sandy silt subgrade filling construction method, sandy silt doped with a curing agent serves as a subgrade, the CBR strength of the subgrade can greatly meet the construction requirement after the subgrade is fully compacted under the optimal water content, and theunconfined compressive strength is effectively improved. Meanwhile, the curing agent can generate more gel substances, so that soil sample particles are more compact, the strength and the stability of a cured soil body are greatly improved, the volume shrinkage in the freezing and thawing process is effectively reduced, the phenomena of local pulverization and peeling and corner falling of the soil sample are improved, and then the freezing and thawing cycle resistance can be effectively improved; and the problem that an existing sandy silt subgrade filling construction method cannot effectively improve the freeze-thaw cycle resistance of a sandy silt subgrade is solved, and wide market prospects are achieved.

The invention provides a solidified substrate manufacturing device and process and a solidified substrate manufactured through the solidified substrate manufacturing device and process, and belongs tothe field of plant cultivation. The solidified substrate manufacturing process comprises the following steps of raw material preparation; charging; heat curing, wherein a high-energy heat source is started, heat is diffused upwards from the bottom face of a mold to gradually heat raw materials, hot-melt cured fibers are controllably melted, meanwhile, a pressure mechanism is started to control apressing block to move, the raw materials are evenly compressed, and the raw materials are bonded; and cooling molding, wherein the high-energy heat source and the pressure mechanism are closed, heating of the raw materials and moving of the pressing block are stopped, cooling and demolding are carried out to form a cured substrate block. Due to the fact that in the curing forming process, the rawmaterials close to a heat source end obtain more heat, the temperature is higher, heating is more sufficient, the hot-melt fibers are more sufficiently melted, and under the simultaneously-generatedcompression of the pressing block, the raw materials are more easily compressed, raw material particles are tighter relatively, connection is more sufficient, the density is higher relatively, and thewater holding pore ratio is more relatively.

The invention relates to a microcapsule containing an active substance and a preparation method thereof, in particular to a multilayer microcapsule containing an embedded active substance and a preparation method of the multilayer microcapsule. According to the application, the microcapsule particles are prepared by a method of combining extrusion rolling core making (or centrifugal granulation core making) with fluidized spray coating; the preparation method comprises the following steps: firstly, preparing a primary pellet core by adopting an extrusion spheronization granulation method or a centrifugal granulation method, and then uniformly fluidizing a water-blocking coating layer material and a hydrophilic coating layer material to the surface of the pellet core. The prepared microcapsule particles are safe, free of toxic and side effects, small in particle size, rich in active substances and good in stability under the normal temperature condition, and have a slow release effect.

Belonging to the technical field of ternary battery preparation, the invention in particular relates to a method for continuous and stable preparation of a lithium battery high nickel ternary precursor. The method for continuous and stable preparation of a lithium battery high nickel ternary precursor provided by the invention carries out stepwise sinking in a high-speed rotating settling chamber,controls the composition of a synthetic precursor by continuous measurement, and sets different rotation rates in each layer of settling chamber so as to ensure the uniformity of settling particle size at each layer, utilizes high-speed rotation to realize spheroidization and controllable particle size of the high nickel ternary material, further realizes coating of low nickel with high nickel continuously, solves the defect of difficult control of the coating process at present, realizes continuous, stable and controllable preparation of high nickel precursor. The finally obtained ternary precursor has the characteristics of uniform particle size distribution, compact particles and high tap density, finally can be sintered and then applied to lithium ion batteries, and under the condition of 0.1C discharge rate, the discharge capacity is up to 296 mAh/g, and the capacity still remains at about 256 mAh/g after 200 cycles.

The invention discloses a copper salt alkalescent electroplating solution for PCB hole metallization and application of the copper salt alkalescent electroplating solution. The pH is 8-10, the copper salt alkalescent electroplating solution is composed of copper salt, a main coordination agent, an auxiliary coordination agent, a pH buffer agent, a uniform plating agent and an induction activator, the mass concentration of the copper salt is 5-20 g/L, and the uniform plating agent is composed of a selenium compound and a salt compound. The induction activator is composed of a cuprous reduction accelerator and a polyalcohol compound. The copper salt alkalescent electroplating solution is stable, low in total concentration of the solution and high in dispersing capacity; and the current efficiency is high, under the specified electroplating condition, obtained copper layer particles are fine and compact, the dispersion capacity value (TP) is high, and electroplating uniform thickening of PCB through holes can be achieved.

Calcium nitrate, diammonium phosphate and urea are mixed and added with strontium phosphate to be mixed, stirred and heated, to prepare strontium containing hydroxyapatite; the hydroxyapatite is added into magnesium chloride and magnesium oxide, added with water to be dissolved, to prepare magnesium oxychloride adhesive; a hand lay-up bone pre-fabricated piece is paved with pulp and glass fiber cloth, flattened, paved uniformly and brushed with glue; and then the prefabricated outer skin is paved and compacted, the seam is sealed by plastic thin film, cured and stripped; the product is trimmed within one day after stripping, and a medical composite glass fiber strontium containing enhanced bone cement product is prepared. The composite material prepared by the invention has the advantages of uniform glass fiber dispersion and good combination of the strontium containing hydroxyapatite and a matrix interface, and biomedical composite material with very good application prospect.

The invention discloses renewable green biomass fuel. The biomass fuel is prepared from, by weight, 30-50 parts of wood processing residua, 5-18 parts of crop straw, 2-7 parts of bentonite compounds, 2-4 parts of methyl alcohol, 2-8 parts of isobutanol, 1-2 parts of ammonium nitrate, 1-2 parts of nonionic surfactant and 1-3 parts of fuel additive. The bentonite compounds are prepared as the following process: mixing and stirring bentonite and water, adopting a sulfuric acid solution to adjust pH value of the system to 3.4-4, adding a poly(diallyldimethylammonium chloride), stirring, filtering and cleaning the mixture, adding potassium carbonate and water, continuing to stir, filter and clean the mixture, drying the mixture to constant weight, grinding the dried mixture, adding and evenly blending soy protein and water, adding and evenly stirring sodium hydroxide at room temperature, adding maleic anhydride and then raising temperature and stirring the final mixture to obtain the bentonite compounds.