162 results about "Slurry" patented technology

An improved method of in-situ conditioning of a polishing pad for use with a stationary pad conditioner during chemical mechanical polishing is described. A polishing table having a polishing pad on its surface is rotated in a first direction during polishing of a semiconductor wafer. A polishing pad conditioner is adjustably attached to the rotating polishing table such that the conditioner is stationary in relation to the rotating polishing table. The conditioner has a roughened surface which is in contact with the polishing pad providing in-situ conditioning during polishing of a semiconductor wafer. After polishing of the semiconductor wafer, the polishing table is rotated in a second direction while the conditioner is still in contact with polishing pad. Rotating the polishing pad in a second direction dislodges the polishing debris clogging the roughened surface of the conditioner and redistributes CMP slurry. The roughened surface of the pad conditioner is refreshed allowing more effective conditioning of the polishing pad. Pad life is prolonged, polishing is stabilized, and the polish cycle time is reduced.

A gas generating process, which is for the continuous production of energy and hydrogen for rocket and other propulsion and is also for the continuous production of hydrogen, utilizes the reaction of metallic materials, particularly aluminum, with organic materials, particularly hydrocarbons provided as jet fuel, and with water or an oxidizer which is predominantly water. In comparison with related reactions, the reaction produces hot gases containing more hydrogen and the products have a lower temperature for the same specific impulse. The process incorporates organic liquids with metallic powders to produce desirable, lower molecular weight exhaust gas products; and the increased hydrogen is desirable for use with a fuel cell and in connection with propulsion of a super-cavitating underwater device. The process is advantageous in that a metal, in powdered form, and a hydrocarbon liquid may be provided together as a slurry or gel for effective metering. The metallic material may also be provided with the organic material in the form of a binder as used in solid propellants, and the organic material and water may be provided together in the form of a water containing liquid monopropellant. The hydrogen containing product gases from the reaction may be further reacted with suitable oxidizers for production of additional energy or steam. The reaction is particularly useful for underwater vehicles where ambient water is available and the reaction products may be used for propulsion.

A slurry composition for chemical mechanical polishing (CMP) of a phase-change memory device is provided. The slurry composition comprises deionized water, a nitrogenous compound, and optionally abrasive particles, an oxidizing agent, or a combination thereof. The slurry composition can polish a phase-change memory device at a high rate, can achieve high polishing selectivity between a phase-change memory material and a polish stop layer (e.g., a silicon oxide film), and can minimize the occurrence of processing imperfections (e.g., dishing and erosion) to provide a high-quality polished surface. Further provided is a method for polishing a phase-change memory device using the slurry composition.

A method of melt infiltration for producing a ceramic matrix composite comprises applying a surface slurry onto one or more outer surfaces of an impregnated porous preform. The surface slurry comprises a solvent and particulate solids, and the preform comprises a framework of ceramic fibers loaded with particulate matter. The surface slurry is dried to form a porous layer comprising the particulate solids on the one or more outer surfaces of the impregnated porous preform. After forming the porous layer, an end portion of the impregnated porous preform that includes at least part of the porous layer is immersed in a molten material, and the molten material is infiltrated into the impregnated porous preform from the end portion. The porous layer serves as a wick to transport the molten material over the one or more outer surfaces, thereby enabling melt infiltration of the impregnated porous preform from other portions thereof.

The invention discloses a three-dimensional printer, a three-dimensional printing method and a preparation method for metal slurry. The printer comprises a support, a printing base plate arranged on the support, an injector arranged on the support and an X-axis stepping motor, a Y-axis stepping motor and a Z-axis stepping motor which are arranged on the support; the injector is used for containing the metal slurry, a spray nozzle is installed at an outlet of the injector, the center line of the spray nozzle perpendicularly intersects with the printing base plate, and the spraying direction of the spray nozzle points to the printing base plate; the X-axis stepping motor, the Y-axis stepping motor and the Z-axis stepping motor control the injector to move in the X-axis direction, the Y-axis direction and the Z-axis direction relative to the printing base plate respectively, an E-axis stepping motor controls a piston of the injector to be pushed in or pulled out of the injector, and any two of an X axis, a Y axis and a Z axis are perpendicular to each other. The printer and the printing method are used for solving the technical problem that in the prior art, a three-dimensional metal printer is high in equipment cost; on the basis that the printing precision is guaranteed, the technical effects of being simple in structure and lowering the cost are achieved.

The invention provides a sludge-based adsorbent used for desulfurization and demercuration of flue-gas and a preparation method thereof. The sludge-based adsorbent employs municipal sludge and/or papermaking sludge as a raw material. The preparation method comprises the following steps: adding an activator and a physical conditioning agent into sludge slurry and carrying out mixing under stirring and mechanical dehydration; carrying out grinding and screening after drying; and carrying out physical activation after pyrolysis in an inert atmosphere so as to prepare the sludge-based adsorbent. According to the invention, the sludge slurry is used as a raw material, and uniformity of the activator and the physical conditioning agent is improved by using a wet method and the means of mixing; the activator and the physical conditioning agent can reduce repulsive interaction and hydrophilic interaction among electronegative sludge particles, and a porous lattice structure with a hard texture and good permeability is formed in a sludge cake obtained after pressure filtration and dehydration; the prepared adsorbent can be used for desulfurization and demercuration of flue-gas; and the preparation method has the advantages of simple procedures, easily controllable conditions, capacity of realizing harmony and unity of sludge treatment and resource utilization and good economic benefits, environmental benefits and social benefits.

The invention provides a method for preparing vegetation form porous concrete, adopting the 'pre-coating' technology, a slurry body with specific compositions coats coarse aggregates to form a sphere with a relatively uniform particle diameter, based on the physical coacervation of the sphere and the agglutination of the surface slurry body of the sphere; and the porous and macroporous structure, the cementation between solid phases of which is good and gas phases of which are communicated, is formed. The method comprises the concrete preparation steps that: (1) the fluidity and the viscosity range of the slurry body used to coat the aggregates are determined, and the mixing ratio is worked out by an absolute volume method; (2) the four-step stirring working procedure and the shaping model of the combination of the vibration and the pressuring are adopted; and (3) hole spaces are subjected to alkali-sealing treatment. The invention solves the difficult problems existing in the prior method that because of the downflow of the slurry body, the distribution of the pore spaces is not uniform and the discontinuous pore spaces increase, and the alkalinity in concrete pore spaces is relatively high, which are adverse to the growth of plants. When the vegetation form porous concrete prepared by the method of the invention is applied to road shoulder separator inserts, construction roofs, protection banks and protection slopes and parking lots of a highway, and good landscape effects and ecological environmental protection significance are achieved.

The invention discloses a slurry stirring device for coated fabric production. The slurry stirring device comprises a stirring tank and a base and is characterized in that a feeding hopper and a wateradding port are respectively arranged on two sides of the top of the stirring tank, a crushing motor is mounted on the lateral wall of the feeding hopper, a crushing roller is connected to the outputshaft of the crushing motor through a reducer, crushing teeth are evenly distributed on the outer wall of the crushing roller, a filter screen is arranged at the bottom of the inner cavity of the stirring tank, an impurity cleaning push plate is arranged on the upper side of the filter screen, and the bottom of the stirring tank is fixedly connected with the base through damping spring columns. The slurry stirring device has the advantages that caked slurry can be crushed and refined before slurry stirring, slurry stirring time is reduced, impurities in the slurry can be removed through filtering by the aid of the filter screen arranged in the stirring tank, the quality of mixed slurry is increased, the impurity cleaning push plate arranged on the upper side of the filter screen can fastpush the impurities accumulated on the filter screen out of the stirring tank, and manual cleaning is not needed.

Various embodiments of the present invention are directed to systems and methods for packing chromatography columns. In one described embodiment of the present invention, a compressible resin is combined with a relatively high-viscosity packing solution to form a resin slurry for packing within a chromatography-column tube. In an alternative embodiment of the present invention, a relatively high-viscosity column-compression solution is used to compress a chromatography column initially packed with a dilute aqueous solution.

The invention relates to a technology for extracting zinc, lead and silver step by step by processing zinc-leached residues by a full wet process, and belongs to the technical field of zinc-leached residue recycle. The technology comprises the following steps of: preparing sulfuric acid into an appropriate concentration, and performing two-stage acid leaching in an appropriate liquid-solid ratio and at a high temperature to obtain slurry; filtering and separating the slurry to obtain lead-silver residues and a zinc-containing solution; oxidizing, neutralizing and deironing the zinc-containing solution, and depositing zinc by using sodium sulphide; and eluting the lead-silver residues, blending with caustic lye at an appropriate concentration to obtain slurry at a certain concentration, reacting at a certain temperature and in a certain solid-liquid ratio, and filtering and separating to obtain a filter cake and a filtrate, wherein the filtrate is directly added with sodium sulphide for lead deposition and the filter cake returns to a silver cyaniding leaching process. The technology is short in process, simple in operation, low in cost and mild and loose in reaction conditions; an acid solution and an alkali solution at high concentrations are not required; requirements on equipment are low; the extraction rate of metal is higher than that in the conventional method; no additional waste solid, waste liquid and waste gas are discharged; the recycle of the eluate and the filtrate is realized; and environment pollution is avoided from the source.

The invention provides a preparation method of catalyst slurry for fuel cell coating, which includes: successively adding catalyst particles, deionized water, a proton exchange membrane solution, alcohol and a stabilizer into a container, and uniformly mixing and dispersing the component to prepare the catalyst slurry, which is 8-28% in solid content and 50-500 mPa*s in viscosity. The mass percentage of the catalyst particles is 6-21% and the mass percentage of the stabilizer is 0.5-5%. The invention also provides the catalyst slurry for fuel cell coating. The preparation method is simple andavailable, is simple in stirring and dispersion and can shorten the whole preparation time. The catalyst slurry is high in viscosity and solid content and is suitable for preparing a membrane electrode in a coating manner.

The invention relates to a loop reaction device in a slurry bed, application and a method for producing hydrogen peroxide. The loop reaction device comprises a slurry bed reactor and a solid-liquid separator, wherein the upper part of the slurry bed reactor is communicated with the upper part of the solid-liquid separator, and the bottom of the slurry bed reactor is communicated with the bottom of the solid-liquid separator; and a coaxial inner sleeve is arranged in the slurry bed reactor, an outer sleeve is arranged between the inner sleeve and the outer wall of the slurry bed reactor at the upper part of the slurry bed reactor, a raw material inlet and a fluid distributor are arranged in the inner sleeve and at the bottom, a gas outlet is formed in the top of the slurry bed reactor, a filtration component is arranged in the solid-liquid separator, and a clear liquid outlet is formed in the wall of the solid-liquid separator via the filtration component. According to a hydrogenation method for producing hydrogen peroxide by an anthraquinone method with the adoption of the slurry bed loop reactor, the gas-liquid-solid three-phase separation efficiency is high, the excess local liquid holdup of a catalyst is avoided, the possibility of excessive hydrogenation is reduced, the hydrogenation efficiency is further effectively improved and a hydrogen peroxide product with relatively high concentration can be obtained.

The invention discloses a laser welding method of a CoCrCuFeNi high-entropy alloy. The laser welding method of the CoCrCuFeNi high-entropy alloy is characterized in that an alloy plate is provided with a V-shaped groove, the surface of the welded groove alloy is ultrasonically cleaned for 30 minutes by acetone, then the groove surface is coated with TiO metal slurry for the first time, and after natural drying, the TiO metal slurry arranged on the groove in a coating mode is subjected to laser cladding; and secondary coating of the TiO metal slurry is carried out, after natural drying is carried out, laser welding is carried out, and welding is completed. The welding method can better solve the crack problem in the welding process and improve the welding quality.

The invention discloses an anti-corrosion and wear-resisting coating for a throwing disc of a pneumatic type feeder. The anti-corrosion and wear-resisting coating is prepared from a POSS (polyhedral oligomeric silsesquioxane) coated multiwalled carbon nanotube, bisphenol A epoxy resin, phenolic resin, wear-resisting filler, a self-lubricating material, an antifoaming agent, a leveling agent, a curing agent and a solvent. According to a preparation method of the anti-corrosion and wear-resisting coating, POSS and a multiwalled carbon nanotube are used for preparing the POSS coated multiwalled carbon nanotube firstly, then the POSS coated multiwalled carbon nanotube are mixed with the bisphenol A epoxy resin, the phenolic resin, the wear-resisting filler, the self-lubricating material, the antifoaming agent, the leveling agent and the solvent in proportion, coating slurry is prepared, the coating slurry is mixed with the curing agent and cured at the room temperature for film forming during construction, and the anti-corrosion and wear-resisting coating is obtained. The preparation process of the coating is simple to operate, and the prepared coating has excellent corrosion resistance, wear resistance, self-lubrication and water lubrication and is an ideal anti-corrosion and wear-resisting material for the throwing disc of the pneumatic type feeder, an oil conveying pipe and the like under severe working conditions.

A method for forming an ultrathin-wall porous metal pipe fitting belongs to the field of powder metallurgy production and includes the steps: firstly, adding monomers and crosslinking agents into organic solvents or deionized water according to the volume ratio of 1-120:1 to prepare pre-mixed liquor with the concentration of 5-50wt%; secondly, mixing metal powder and pore-forming agents with the prepared pre-mixed liquor of a stable gel system, adding dispersing agents accounting for 0.05-5wt% of the mass of metal powder, adjusting pH (potential of hydrogen) and stirring or ball-milling the mixture for 2-10h to prepare suspending slurry with fine flowability; thirdly, adding 0.1-3.5wt% of catalysts and initiating agents, evenly stirring the mixture, filling the mixture into a large-size mould in a complicated shape after vacuum degassing, demoulding after solidifying the mixture for 30s-30min at the temperature of 30-90 DEG C, and drying a blank in vacuum or protective atmosphere; and finally sintering the blank into a pair. The method can be used for preparing the ultrathin-wall porous metal pipe fitting, so that the problem of easiness of breakage in pressure forming is avoided. By adjusting the content and the granularity of the pore-forming agents, the porosity and the pore size of the part are controlled, and the method is simple in process and low in production cost.

The invention discloses a method for determining reservoir water saturation, which comprises the following steps of: obtaining the porosity and permeability of a rock core, and establishing a porosity-permeability calculation model by combining acoustic logging data; Obtaining a saturation index n value, and establishing a reservoir resistivity calculation model when the water content is 100%; Respectively establishing a calculation model of irreducible water saturation and residual oil saturation; Determining the resistivity of the original formation water and the resistivity of the slurry filtrate of the oil reservoir by utilizing test analysis, and determining the resistivity of a pure oil layer by irreducible water saturation, residual oil saturation, resistivity of a flushing zone anda saturation index; And establishing a new reservoir water saturation calculation model, and calculating the reservoir water saturation through the reservoir measurement resistivity, the reservoir resistivity when the water content is 100%, the pure oil layer resistivity and the irreducible water saturation. According to the method, the water saturation of the reservoir stratum is solved point bypoint through logging data without depending on an alpha formula under the condition that formation water resistivity of different stratum sections of the stratum is unknown, and a new method is provided for accurately solving the water saturation of the reservoir stratum.

The invention discloses a manufacturing method of an implantable artificial retina ceramic packaging body. The method comprises the following steps: 1, providing a ceramic substrate with at least one through hole; 2, filling the through hole with a conductive slurry with biological compatibility, and sintering both the conductive slurry and the ceramic substrate; 3, forming conductive welding discs with biological compatibility on the upper surface and the lower surface of the conductive slurry exposed outside the through hole after sintering in the second step; 4, arranging a metal ring with biological compatibility on the ceramic substrate, wherein the metal ring surrounds all the conducive welding discs disposed at the same side of the ceramic substrate; and 5, arranging a metal cover with biological compatibility on the metal ring to form an enclosed space accommodating a circuit board. According to the invention, the packaging body manufactured by use of the method is high in airtightness, prevents a human body from damage caused by penetration of incompatible substances in the packaging body into a body fluid and is good in biological compatibility. The difficulty in a manufacturing process is quite low, and the method is easier to promote.

The invention discloses a step-by-step heating system for high-viscosity slurry. The system comprises a preheating hydrolysis tank, a material pump, a high-temperature and high-pressure heat exchanger, a reaction processing unit, a heat source, a heat taking and utilizing unit and a subsequent processing unit. The system has the advantages that aiming at the high-viscosity slurry, through rapid primary heating and thermal hydrolysis viscosity reduction treatment of strong mechanical disturbance in the preheating hydrolysis tank and a step-by-step heating strategy for secondary preheating in the high-temperature and high-pressure heat exchanger, the high-efficiency heat exchange and temperature rise and low-resistance conveying of sludge to be preheated to the supercritical temperature areeffectively realized, and the high-efficiency and low-cost implementation of a supercritical water harmless treatment and resource utilization process for oil sludge, oil sand, high-viscosity organicmatter and other various slurry including the sludge is effectively promoted.

The invention discloses production equipment of autoclaved aerated concrete blocks, comprising a feed inlet, a conveyer belt, a crushing stirrer, a feeding mixing chamber, a moving pouring chamber, a hardening curing chamber, a solid cutting machine, a sealed autoclaving chamber and a conveying hanging tool. The crushing stirrer is connected between the conveyer belt and the feeding mixing chamber. The feeding mixing chamber is connected between the crushing stirrer and the moving pouring chamber. The moving pouring chamber is connected between the feeding mixing chamber and the hardening curing chamber. The hardening curing chamber is connected between the moving pouring chamber and the solid cutting machine. An auto-metering display screen helps improve precision of material weighing; a grinding crushing chamber helps improve viscosity of prepared slurry; a speed governor helps improve intelligence level and production efficiency.