5results about How to "No deposition" patented technology

The invention relates to the field of immersed coolants, and discloses a low-density high-thermal-conductivity composite silicone oil coolant and a preparation method thereof, the method comprises preparation of naphthyl-terminated aryl silicone oil and application of the naphthyl-terminated aryl silicone oil to a base liquid of the silicone oil coolant, and the thermal conductivity of the silicone oil coolant is improved. Dissolving dimethyldichlorosilane in tetrahydrofuran, dropwise adding a naphthalene Grignard reagent into the mixed solution, and after the reaction is finished, carrying out quenching, extraction and other processes to obtain dimethylnaphthalene aryl chlorosilane; adding a potassium carbonate solution into the dimethyl naphthyl aryl chlorosilane, and extracting after reaction to obtain dimethyl-naphthyl siloxane alcohol; adding a tin catalyst into the dimethyl-naphthyl siloxane alcohol, carrying out vacuum reaction, rectifying and purifying to obtain tetramethyl dinaphthyl disiloxane; the naphthyl-terminated aryl silicone oil is prepared by taking DMC as a raw material, KOH potassium as a catalyst and tetramethyl dinaphthyl disiloxane as an end capping agent. The composite silicone oil cooling liquid with low density, high specific heat capacity and stable structure is prepared by stirring, mixing and compounding.

This invention discloses a method for constructing a cofferdam bottom sealing system in deep silt geological conditions. The successful application of this method solves the problem of insufficient bearing capacity in deep silt layers. Previous methods used the original foundation surface as the reference elevation for the bottom concrete, increasing the bond strength between the concrete and the sheet pile cofferdam / steel casing to meet the concrete's anti-buoyancy and anti-sinking requirements. However, large-scale application of this method leads to increased concrete usage and lower safety performance in subsequent construction. This invention further removes silt from the original foundation to ensure no silt deposition on the bottom sealing base surface, preventing the bottom sealing concrete from mixing with deposited silt and reducing its strength. Furthermore, it uses replacement filling to form a new base structure, increasing the bearing capacity of the bottom sealing base surface and enhancing the safety of subsequent pile cap construction. Overall, it reduces material waste and significantly saves economic costs.

This invention discloses a surface-modified current collector, an all-solid-state battery, its preparation method, and an electrical device. The surface-modified current collector includes a negative electrode current collector substrate, a lithium storage layer, and a lithiophilic layer arranged sequentially along the thickness direction. The lithium storage layer has a plurality of micropores oriented perpendicularly to and / or inclined to the surface of the negative electrode current collector substrate. The lithium storage layer includes a conductive micropore template with a micropore structure having a plurality of micropores with the same orientation as the micropores and a vanadium nitride layer disposed on the surface of the conductive micropore template and the inner wall of its micropore structure. This lithium storage layer constitutes a three-dimensional conductive framework, which can guide lithium ions to transport longitudinally or tend to transport longitudinally and deposit uniformly, suppress lithium dendrite growth, and alleviate volume expansion stress during cycling. The lithiophilic layer provides low nucleation overpotential sites, further promoting uniform lithium deposition. Through the synergy of the above layers, uniform lithium deposition can be effectively achieved, and volume expansion stress during cycling can be dispersed and absorbed, significantly improving the cycle performance and safety of the battery.

The invention belongs to the technical field of vacuum pump cleaning, and particularly relates to a vacuum pump cleaning system for a single crystal furnace and an oxide deposition prevention screw pump.The vacuum pump cleaning system comprises the screw pump, the inlet end of the screw pump is communicated with the single crystal furnace, and an oxide deposition prevention device is arranged on a pump body of the screw pump; the oxide deposition prevention device is used for blowing compressed gas which does not react with doping in the single crystal furnace into a pump cavity of the screw pump during operation of the screw pump, the compressed gas is blown from the inlet end of the screw pump, the oxide deposition prevention device comprises a compressed gas generator and at least one gas blowing pipe, one end of the gas blowing pipe is connected to the compressed gas generator, and the other end of the gas blowing pipe is connected to the screw pump. The other end of the air blowing pipe is communicated with a pump body of the screw pump, the air blowing pipe blows compressed air to a rotor or an inner cavity in the vacuum pump and blows up oxide attached to the rotor or the inner cavity in the vacuum pump, the oxide is discharged from an outlet of the screw pump along with operation of the vacuum pump, and the situation that the oxide is deposited on the rotor, and consequently the pump is stuck is avoided.

The utility model discloses a kind of impurity removal structure and the air purifier of its application, all include: roll core, adhesion layer is equipped on the outer surface of roll core, adhesion layer is used to adhere the pollutant on filter core;Roll core fixing seat, along the radial direction of roll core, roll core fixing seat is adjacent to the setting of roll core, and along the axial end of roll core, roll core fixing seat is rotatably connected with roll core;Roll core fixing seat further includes along the radial direction of roll core, fixed cover being arranged at the both sides of roll core, the side of fixed cover close to roll core is first face, fixed cover, roll core and roll core fixing seat are enclosed into containing cavity for accommodating pollutant between, rotate roll core, to gather and accumulate the pollutant adhered by adhesion layer in containing cavity, cleaned filter core part is clean, there is no pollutant deposition, filtration efficiency is improved, can reduce the replacement or cleaning frequency of filter core;Among them, air purifier uses transmission structure to drive impurity removal structure reciprocatingly moves on impurity accumulation surface, can improve the working efficiency of air purifier, reduce air purifier energy consumption.