38results about How to "Meet preparation" patented technology

The invention discloses a crack-containing rock material preparation test device and a use method. The crack-containing rock material preparation test device comprises a bottom plate, a static side plate and a movable side plate, the static side plate is fixed on the bottom plate, the side end of the static side plate is connected with one side of the triangular auxiliary baffle, and the other side of the triangular auxiliary baffle is fixed on the bottom plate; the movable side plate is movably arranged on the bottom plate, and a crack placement cavity is formed between the movable side plate and the static side plate; the static side plate and the movable side plate are provided with at least one group of crack placement structures; the fracture placement structure comprises at least one group of fracture structures, and the fracture structures are located in the fracture placement cavity; connecting pieces used for limiting displacement of the movable side plate in the horizontal direction are arranged at the connecting positions of the static side plate and the movable side plate. The triangular auxiliary baffle is provided with at least two adjusting bolts, and the adjusting bolts penetrate through the triangular auxiliary baffle and are in contact connection with the movable side plate. Compared with traditional rock-like modeling equipment, the modeling equipment has more flexible model size control capability, and is convenient to demould and simple to operate, and the modeling equipment is long in service life and wide in application range.

The invention provides a preparation method of an Al4Cu9 single-crystal particle. The atom ratio of the chemical components of AAl4Cu9 single crystal is as follows: 28-31% of Al and 69-72% of Cu; the preparation method of the Al4Cu9 single-crystal particle mainly comprises the steps of after evenly mixing high-purity aluminum powder and copper powder, putting the mixture into a hard alloy die, and using a powder compressing machine to apply 3MPa pressure and maintaining the pressure for 180 s to obtain a prefabricated block; putting the prepared prefabricated block into a boron nitride crucible, after assembling the boron nitride crucible, a tubular graphite furnace, graphite sheets and boron nitride sheets in sequence, placing the assembly into a cubic press, and maintaining the temperature for 30 min, wherein the pressure is set in the range of 3-5 GPa and the peak temperature is controlled in the range of 1100-1150 DEG C; when the temperature is reduced to 800-950 DEG C, maintaining the temperature for 1-2 h. The preparation method of the Al4Cu9 single-crystal particle has the advantages of simple process, true feasibility, common experiment equipment and good generated-single-crystal quality.

The invention relates to a micro-nano structure processing method and system for array anti-reflection and anti-reflection functions. Solve the problems of low efficiency, poor precision and poor consistency in the anti-reflection and anti-reflection micro-nano structure processing method of large-format transparent curved surface components realized by laser single-point processing. The method includes: determining the manufacturing focal depth h of each micro-nano structure; dividing the surface of the curved part to be processed into several sub-regions; determining the number of processing beams in the array processing beams when processing each sub-region; laser beam splitting and shaping; each sub-region Areas are machined sequentially: edge areas are machined. The system includes a laser, an SLM spatial light modulator, a Fresnel lens group, a scanning vibrating mirror and a field mirror which are sequentially arranged in the exit light path of the laser. The system and method of the invention can greatly improve the manufacturing efficiency of the array microstructure.

The invention relates to a macromolecular coupling agent containing active cyano groups and a preparation method thereof. Azodiisobutyronitrile is used as an initiator, and one of xylene, toluene, benzene or dimethylformamide is used as a solvent to synthesize a ternary random copolymer by free radical polymerization. Preparation steps: Add solvent, monomer and initiator to a three-necked flask in sequence, stir and feed nitrogen, slowly heat to keep warm, and stop heating after reaction. After cooling down, add a certain amount of acrylonitrile into the three-necked flask, heat and keep warm, and distill under reduced pressure. Finally, it was dissolved in tetrahydrofuran, precipitated in methanol, and dried in vacuum to obtain a terpolymer macromolecular coupling agent. The coupling agent is suitable for a composite material system with cyanate resin as the matrix and glass fiber or inorganic particles as the reinforcing material. The preparation process is simple and the reaction time is short, which lays the foundation for industrial production.

The invention relates to a manufacturing device and a manufacturing method for a polarization maintaining optical fiber preform. The device comprises a disk with scaled calibration, four claws forming a cross shape and screws in one-to-one correspondence and meshing connection with the claws; and the rotating screw can control relative movement of the four claws. Two claws in the horizontal direction are respectively provided with a groove with adjustable diameter.

The present invention relates to a multi-material 3D printing porous nozzle and method integrated with laying, forming and cutting. The nozzle includes a fiber resin porous wire feeding nozzle, a carbon fiber cutting mechanism, and a fiber filament laying stop mechanism. The fiber resin porous wire feeding nozzle includes The nozzle base frame, the porous wire feeding nozzle, the porous wire feeding nozzle extends downward through the nozzle base frame to extend the porous wire laying head and the resin heating nozzle; the carbon fiber cutting mechanism can realize the partial cutting and trimming of the fiber filament, and the fiber filament laying The stop mechanism can clamp the filaments before cutting. The invention can realize the simultaneous laying of multiple carbon fiber filaments and the synchronous curing and compaction, improve processing efficiency, and can realize carbon fiber laying and arbitrary cutting at any angle, saving materials and having a high degree of automation.

The invention provides a preparation method of forsifluconazole, comprising the following steps: preparing fluconazole dichlorophosphate: under nitrogen protection, at a temperature of ‑10 to 0 DEG C, adding a solution of triethylamine in dichloromethane Phosphorus oxychloride was slowly added dropwise, after the dropping was completed, the temperature was maintained at -10 to 0 °C and stirred for 1 hour, the dichloromethane solution of fluconazole was slowly added dropwise, and the reaction was monitored by TLC; the temperature was maintained at -10 to 0 °C, and water was added. Stir for 30 minutes, add an inorganic base until the pH of the aqueous phase is at least 8, stand for stratification, separate the upper aqueous phase, the organic phase contains fluconazole dichlorophosphate, pass through fluconazole-fluconazole dichlorophosphate ‑Fluconazole dibenzyl phosphate ‑ Forse fluconazole ammonium salt ‑ Forse fluconazole process to prepare forse fluconazole, improve yield, controllable preparation of intermediates, raw materials can be recycled and reused, reduce raw material waste and Organic waste pollution.