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60results about How to "Strong permeability" patented technology

Method for metalizing beryllium oxide ceramic

The invention belongs to the technical field of electronic functional ceramic materials, and in particular relates to a method for metalizing beryllium oxide ceramic. The technical problem solved by the invention is to provide the method for metalizing the beryllium oxide ceramic. The method comprises the following steps: A, preparing a metalizing sizing material additive by adopting raw materials of Al2O3, SiO2, CaCO3 and BaCO3 and a ball milling process; B, adding tungsten powder and manganese powder into the metalizing size additive, and performing ball milling to obtain metalizing powder; C, adding an active agent Y2O3 and a binding agent, and performing vibro-milling filtration to obtain a metallization sizing material; and D, performing metallization sintering. By adopting the metallization method provided by the invention, the sizing material sintering temperature is low, a single-sintering metallization layer is thick and can be sintered for multiple times, and energy consumption is reduced; moreover, the metallization layer after nickel plating has the characteristics of being good in stripping effect, high in stripping strength, high in tensile strength and the like, not only can meet metallization requirements of 99% of the beryllium oxide ceramic but also can meet requirements of 97% of beryllium oxide ceramic and beryllium oxide based attenuation ceramics, and is wide in application range.
Owner:宜宾红星电子有限公司

Novel method for enriching metal rhenium in high-temperature alloy waste recovery technology

The invention relates to a method for enriching metal rhenium in a high-temperature alloy waste recovery technology. The method is characterized by comprising the following steps of: adopting kieselguhr for replacing strong basic resin adopted in wet-process metallurgy, treating filtrate containing metal rhenium ions, enriching the metal rhenium ions in the filtrate by using the characteristics such as large porosity, strong adsorbability and stable chemical property of the kieselguhr, and soon afterwards, purifying the rhenium. The method has the remarkable advantages that the strong adsorption capacity and selectivity of the kieselguhr on the metal rhenium ions are used for enriching the metal rhenium ions in the filtrate; compared with ion exchange adsorption, the kieselguhr has high adsorption efficiency on the metal rhenium ions, increases the direct yield of the metal rhenium and is easy to desorb; lots of inorganic acids do not need to be consumed; the technological process is greatly shortened; the production working procedure is simplified; the environmental friendliness pressure is reduced; and simultaneously, high economic benefits are achieved. The method is a comprehensive recovery technology which is concise, short in technological process, small in specific volume and low in cost and has little pollution; and reports related to the method are not found at home and abroad.
Owner:昆明铂生金属材料加工有限公司

Method of improving bonding performance of fiber bundle and potassium magnesium phosphate cement-based material

The invention discloses a method of improving bonding performance of a fiber bundle and a potassium magnesium phosphate cement-based material and relates to a manufacturing technology of a fiber-reinforced potassium magnesium phosphate cement composite material. A novel fiber impregnating compound prepared by the method has characteristics such as strong permeability, quick curing, controllable curing speed, high bonding strength, acid resistance, pressure resistance and high temperature resistance. In the fiber bundle cured by the novel fiber impregnating compound, fiber filaments are bonded into an integer by a network structure of -Si-O-Si-, all fiber filaments can be stressed at the same time, and axial tension of the fiber bundle is improved by twice to three times in comparison with that of the un-treated fiber bundle. In the fiber-reinforced MPC(Magnesium Phosphate Cement)-based composite material prepared by the fiber bundle cured by the novel fiber impregnating compound, dead-burned magnesium oxide powder deposited on the surface of the fiber bundle participates in hydration reaction of an MPC base body, so that interface bonding of the fiber bundle and the MPC base body is reinforced; and pulling-drawing force of the fiber bundle is improved by 15%-40% in comparison with that of the fiber bundle treated by an epoxy resin impregnating compound. The method disclosed by the invention is simple in preparation process and convenient to use, and has cost which is only 1/10-1/6 of that of the epoxy resin fiber impregnating compounds.
Owner:YANCHENG INST OF TECH

Hierarchical ordered macroporous-mesoporous monolithic silica column bovine serum albumin imprinted polymer and preparation method thereof

The invention provides a hierarchical ordered macroporous-mesoporous monolithic silica column bovine serum albumin imprinted polymer and a preparation method thereof. The preparation method comprises the following steps: synthesis of polystyrene colloidal crystal; synthesis of a hierarchical ordered macroporous-mesoporous monolithic silica column; preparation of gamma-(methyacryloyloxy)propyltrimethoxysilane modification material for the hierarchical ordered macroporous-mesoporous monolithic silica column; and preparation of the hierarchical ordered macroporous-mesoporous monolithic silica column bovine serum albumin imprinted polymer. The synthesized hierarchical ordered macroporous-mesoporous monolithic silica column has regular macroscopic and microscopic structures, good permeability, low backpressure and fast mass transfer kinetic action; the recognition site of the synthesized bovine serum albumin imprinted polymer is located on or close to the surface of the polymer, which facilitates bovine serum albumin molecules in entering and exiting from imprinting holes and improves selectivity of bovine serum albumin; and the hierarchical ordered macroporous-mesoporous monolithic silica column bovine serum albumin imprinted polymer has good bovine serum albumin separation performance and has adsorption capacity of 121.6 mg/g.
Owner:上海健士拜生物科技有限公司 +1

Sandy wall rock grouting strengthening method in subsurface excavation construction

The invention relates to a sandy wall rock grouting strengthening method in subsurface excavation construction, comprising the following steps of: installing a grate; installing a grouting pipe; and grouting, wherein the grouting pipe is installed by adopting a sand blasting pore-forming method; after the grate is completely installed, and then an air pressure gun with high pressure of 0.8 MPa is adopted for sand blasting pore-forming; one end of the air pressure gun is connected with high pressure air, and the other end is slowly inserted into a sand layer along the installation position of the grouting pipe to blast pores; after pore blasting width achieves the length of the grouting pipe, the air pressure gun is fast extracted, the grouting pipe is immediately inserted, and the tail part of the grouting pipe is spot-welded on the grate for fixation; grouts are grouted into the grouting pipe by using a grouting pump, blended grouts are delivered into a grouting tank by using a high pressure air grouting process. The invention solves the problems of sand leakage, sand drifting and collapse of a sandy layer excavation surface in the subsurface excavation construction, ensures the excavation construction safety and the peripheral environment safety and has the advantages of stable construction quality, effective control of a grouting range, small grout loss amount, reliable construction quality and simple construction method.
Owner:THE FIFTH ENG CO LTD OF CHINA TIESIJU CIVIL ENG GRP

Cement wet grinder

The invention discloses a cement wet grinder. The cement wet grinder is characterized by comprising a shearing dispersator, a mixing tank and a shearing colloid grinder, wherein the shearing dispersator comprises a stirring motor, a dispersing plate, a mixing paddle and a smashing plate, the stirring motor is connected with a transmission shaft, the transmission shaft is provided with the mixing paddle and the dispersing plate, the bottom part of the transmission shaft is provided with the smashing plate, the top part of the mixing tank is provided with a cement material inlet and a circulating pipe, the bottom part of the mixing tank is provided with a material outlet pipe, the material outlet pipe is connected with a cement slurry outlet and the shearing colloid grinder, the shearing colloid grinder comprises a motor and a wet grinder, the motor is controlled by an electric appliance controller, the motor is connected with a rotating stator, the rotating stator is arranged in the wet grinder, the rotating stator is provided with a rotating stator grinding plate, and the top part of the wet grinder is connected with the bottom part of the circulating pipe. The cement wet grinder disclosed by the invention has the advantages that the shearing is high-speed, the smashing and the mixing are complete, the device stability is good, the permeability is strong, the design is reasonable, the operation is convenient, the energy consumption is low, and the benefit is high.
Owner:陶裕兴 +1
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