41 results about "Free particle" patented technology

Hydrofluoric acid (HF) mixed with water and often buffered with ammonium fluoride is a standard silicon dioxide wet etchant which is followed by a rinse. An improved silicon dioxide etch is vapor HF which may be followed by a water vapor rinse. The invention discloses a further improved silicon dioxide etch. Following an initial exposure to vapor HF for oxide removal, a first insitu water rinse occurs. A second exposure to vapor HF then occurs and is followed by a second insitu water rinse. Water, rather than water vapor, aids in freeing particles from the wafer surface. During both the water rinses, the wafer may be rotated at increasing speeds to aid in sweeping particles from wafer surface. The process may be practiced in a commercially available reactor and is suitable for ULSI devices having complex topographies, such as, for example, 64 megabit DRAMs employing crown type memory cells.

The invention discloses a methanol-gasoline-resisting static-electricity-conducting anticorrosive paint, which is prepared by the following raw materials according to weight: a component A consisting of 25-39 parts of epoxy resin, 5-20 parts of pigment and filler, 15-28 parts of static-electricity-conducting filler, 0.2-2 parts of carbon nanotubes, 0.3-1 part of cinnamyl aldehyde, 2-6 parts of auxiliaries, and 5-16 parts of diluent, and a component B consisting of 7-11 parts of modified aromatic aliphatic amine hardener. According to the invention, the epoxy resin is formed by epoxy phenolic resin and bisphenol F-type epoxy resin according to a weight ratio of 3:(1-3), and the modified aromatic aliphatic amine hardener is one out of D9050 and D9340 or the mixture of the two. According to the invention, the component A and the component B are prepared first respectively. When in use, the component B is slowly added into the component A to be stirred uniformly to obtain a final product. The anticorrosive paint prepared in the invention can resist permeation and corrosion of strong solvents, and free particles cannot be separated out from the methanol gasoline after long-term storage, thereby preventing influence resulted by storage to the quality of a finished oil product.

The invention relates to a lead-free nontoxic low-frequency multiferroic nanoparticle magnetic-electric composite material and a preparation method thereof. The low-frequency multiferroic nanoparticle magnetic-electric composite material has magnetic-electric coupling effect. The low-frequency multiferroic nanoparticle magnetic-electric composite material has a chemical formula of xCoFe2O4-(1-x)[0.948(K0.5Na0.5)NbO3-0.052LiSbO3], wherein the optimal mol doping quantity x is 0.2-0.4mol. The parent phase of the composite particle material is 0.948(K0.5Na0.5)NbO3-0.052LiSbO3 with ferroelectricity, which is prepared by using a traditional solid phase method, and the doping phase thereof is a nanoparticle CoFe2O4 with ferroelectricity, which is prepared by using a sol-gel method. The multiferroic particle magnetic-electric composite material has the characteristics of better magnetic-electric coupling property, higher hardness, durability, and the like compared with the similar lead-free particle composite materials; and the preparation method is simple, low in the requirement on production equipment, and easy to massive production. The multiferroic particle magnetic-electric composite material has better ferroelectricity and stronger ferromagnetism and magnetic-electric coupling property, obtains wide application prospect in the fields of a sensor, a capacitor, a magnetic-electric storage, and the like, and achieves important function on the aspect of basic physics research.

The invention discloses an antibiotic residue treatment process. Electronic beams are used for performing the radiation treatment for the antibiotic residue, the electronic beams directly act on antibiotic molecules and/or antibiotic genes to destruct the structure, a majority of electronic beams act on the water molecules in the antibiotic residue to generate strong oxidant particles such as hydroxyl free radicals (.OH) and peroxide (H2O2), a same amount of strong reduction particles such as hydrate electrons (eaq-) and hydrogen atoms (H.) is generated, the free particles are used for destructing the structure of the antibiotics and the antibiotic resistant genes, and the sterilizing, disinfecting, deodorizing and floc decomposition purposes can be simultaneously realized.

The invention relates to a sheath-liquid-free particle three-dimensional focusing microfluid chip and a focusing method thereof, and belongs to the field of inertial microfluid chips. The microfluid chip is formed by bonding encapsulation of a flow channel layer and a base layer, and the flow channel layer includes a flow channel structure high in depth-to-width ratio and formed by periodic alternation and series connection of rectangular-section straight flow channels and curved flow channels. In a curve of each focusing period, under the action of inertial lift force and Dean drag force, particles are pushed and squeezed to the center of the section of the flow channel together, and the particles are gathered to the outer side of the flow channel; by means of inertial lift force in the straight flow channels in the next focusing period, cross-section distribution difference, obtained in the previous period, of the particles is subjected to induction and reorganization, so that distribution density difference between the two sides of each straight flow channel is further increased, and after multi-period focusing cumulative effect, sheath-liquid-free particle single-beam three-dimensional focusing arrangement is achieved. By means of the flow channel structure, the three-dimensional single-beam focusing arrangement of particle groups with the flow speed range of 50-2000 microliter/min and the particle size range of 1-30 microns can be achieved.

The invention discloses a lens-free particle microscopic localization device and method based on LED light sources. The lens-free particle microscopic localization device comprises the LED light sources, a sample arranging cell and a CMOS (complementary metal oxide semiconductor) or CCD (charge coupled device) camera sensor, wherein the more than two LED light sources are arranged in different positions above the sample arranging cell to irradiate a sample from different angles; the sample arranging cell is arranged above the camera sensor, the distance between the lower surface of the sample arranging cell and the camera sensor is as small as possible, and the sample arranging cell and the camera sensor keep parallel to guarantee the quality of interference images. The device is simple in structure, rapid, accurate, concise, efficient and low in cost; extraction and reduction of particle location and dimension information are realized with numerical propagation and decision methods, multi-particle information is recorded in real time, and particle tracking is realized.

The invention relates to the technical field of fluid mechanics, and provides an open channel non-constant flow mesh-free particle simulation method containing cross section changes to simulate the open channel non-constant flow problem containing the cross section changes. Therefore, the technical scheme adopted by the invention is as follows: the open channel non-constant flow mesh-free particlesimulation method containing the section change comprises the following steps: step 1, initializing related variables and operating parameters of a system; Step 2, generating particle information; Step 3, listing a solving equation and performing iterative calculation; step 4, outputting a result: updating the result every time calculation of one time step is completed, namely simulating the water depth, the cross sectional area and the flow velocity of the open channel water flow at each moment; And completing the circulation of the time step and outputting a final result. The method is mainly applied to an open channel non-constant flow gridless particle simulation occasion.

The invention discloses a method for preparing a high-temperature-resistant nanocrystalline nickel-cobalt coating on the surface of a copper alloy. The method comprises is characterized in that high-temperature-resistant nanocrystalline nickel-cobalt coating is prepared by adopting a free particle-assisted friction electrodeposition technology; the free particle-assisted friction electrodepositiontechnology is characterized in that ZrO2 ceramic particles are added into a deposition tank filled with an acid deposition solution, and then the copper alloy serving as the cathode is placed in thedeposition tank for reciprocating movement, so that the nickel-cobalt coating is deposited on the surface of the copper alloy; the formula of the acid deposition solution is characterize in that nickel sulfate is 220-250g/L, cobalt sulfate is 30-50g/L, nickel chloride is 45-60g/L, boric acid is 40-60g/L, and the pH value is equal to 4.0-5.0. According to the method for preparing the high-temperature-resistant nanocrystalline nickel-cobalt coating on the surface of the copper alloy, the acid deposition solution is selected for use, the ZrO2 ceramic particles are added into the acid deposition solution, by using relative movement formed by the ceramic particles and the copper alloy, the hydrogen evolution phenomenon can be greatly reduced, and the problems of pinholes, hard spots, nodulationand the like existing in the electrodeposition process are solve, so that the crystal grains are effectively refined, and the quality of the nickel-cobalt coating is finally improved.

The invention discloses a manufacturing process for a recycled aggregate art tile. The manufacturing process comprises the following steps of preparing recycled micro-powder, preparing soil-free particles, preparing a plant material, mixing, wheel grinding and mixing, aging for shaping, glazing, preparing in a kiln, and taking out from kiln; stacking; and repairing, packaging, and storing. The recycled aggregate art tile has the characteristics of highly wear resistant, light, and resisting high temperature. The manufacturing process fully utilizes building waste, garden waste and industrial waste material, thereby recycling wastes more efficiently; due to adding of the plant material, glazing is easier; the recycled aggregate art tile has excellent inset prevention performance, corrosionresistance and moisture-proof performance, needs no maintenance, has a long service life, has a range of colors, and can be customized; the recycled aggregate art tile has various surface patterns, isfar better than stone material and can be compared with wood, is desirable yet affordable, has stable performance, can transmit cultures, is environment-friendly and makes the best of resources, andcan beautify the living environment.

The present invention discloses a shaft part on the spiral track line contact surface. The shaft part comprises a shaft and a spiral track cylindrical member fixed on the shaft, wherein ribbon materials are wound on the shaft body and are subjected to spiral forming along the axis direction to form the spiral track cylindrical member, the outer surface of the spiral track cylindrical member is the working surface of the shaft after the forming, and the gap exists between the two ribbon materials and can accommodate lubricating oil and free particles. The shaft part of the present invention has characteristics of long service, large bearing capacity, and low maintenance cost.

The invention discloses an active molecule coupled cloth bag catalytic filtration process for incineration flue gas near-zero emission. According to the process, after flue gas from a waste incineration power generation boiler is subjected to semi-dry deacidification through the original process, and passes through a traditional cloth bag dust removing device, the flue gas is completely mixed withactive molecules, and other free particles are generated; the obtained gas enters a catalytic filtering cloth bag, and under the action of a filtering catalyst on the surface of the cloth bag, NO, dioxin and other pollutants are subjected to strong catalytic oxidation into soluble or easily absorbed and removed molecules; the obtained gas enters an efficient washing tower, and the soluble or easily absorbed and removed molecules are effectively absorbed and removed; and finally the obtained material enters a wet electrostatic precipitator, and fine particles and fog droplets are further removed so as achieve the near-zero emission of acidic substances, dioxin, dust particles and fog droplets in the flue gas. According to the present invention, the process is designed for waste incineration flue gas, has advantages of simple process and low reforming cost based on the reforming of the original process, can effectively remove acidic pollutants such as NOx, SO2 and the like, can highly remove dioxin, and further has other advantages.

The invention relates to a method and a device for pre-detecting of particle impact noise detection (PIND). The method comprises cleaning and treating circuit substrates, installing the pre-detecting device of the PIND, performing the PIND, cleaning and treating the circuit substrate again if the circuit substrates are detected to be unqualified, performing parallel seal welding after all the circuit substrates are detected again to be qualified by means of the PIND. Redundancy can be detected and treated before the circuit is encapsulated, the fact that the redundancy is detected after the circuit is encapsulated so that the circuit has to be discarded or remade is avoided, and control level of product quality is improved. The invention further provides the device for pre-detecting of the PIND, the device comprises a container and a press board, wherein the container is provided with a cavity matched with an encapsulating casing, and the end face of an opening of the container is provided with the press board fixedly connected or separated from the container. The method and the device for the pre-detecting of the PIND solve the problem of fixation of the circuit encapsulating casing during pre-detecting, achieve simulation encapsulation of the circuit, and perform pre-detecting on free particles in the simulation encapsulating cavity so as to achieve an alarm function.

An apparatus and a method of enhancing boiling heat transfer therein capable of increasing both the critical heat flux and nucleate boiling heat transfer of a working fluid. The method includes placing free particles on a surface so as to define narrow corner gaps and cavities at interfaces between the particles and the surface and heating the surface while the surface is contacted by the working fluid to bring the working fluid to a boil, with the result that bubble nucleation is facilitated and nucleate boiling heat transfer from the surface is increased.

The invention relates to a free-particle skin cutting device and an application method thereof. The free-particle skin cutting device comprises an inverted barrel-shaped body, first blades are vertically arranged on the front side and the back side of the lower end of the barrel-shaped body respectively, second blades are arranged on the two sides between the two first blades, knife edges of the second blades are opposite, and positions of the knife edges of the second blades are higher than positions of the knife edges of the first blades; a driving mechanism for driving the pair of the second blades to move towards each other in opposite directions is arranged on the barrel-shaped body, and an adsorption mechanism for adsorbing free skin is also arranged on the barrel-shaped body. The free-particle skin cutting device is compact in structure, and is conveniently used for cutting the free skin, and the application method is simple and convenient.

A device is constructured and arranged to collect and guide free particles which are produced when tobacco machining industrial products containing bar-shaped, powdery or particulate particles are conveyed from a sending point to a receving point in a pneumatic conveying pipe along the Y-direction. The device comprises a shell forming a separating cavity, an input segment and an output segment for rod-shaped products, wherein between the input segment and the output segment, a guide element containing a guide channel is arranged in the separating cavity; the rod-shaped products can be guided by the guide channel to pass through the separating cavity; the guide channel of the guide element is connected with the separating cavity with a cross section larger than the guide channel via an opening; and a device collecting and guiding free particles is constructured as a passive separating system. The invention further relates to a corresponding method, in which, when free particles in the rod-shaped products enter the device, the free particles can be suddenly guided out from the guide channel and a size of the free particles is increased based on ratio of the guide channel and the separating cavity.

The invention discloses an atmospheric pressure low temperature plasma air purifying device. The atmospheric pressure low temperature plasma air purifying device comprises a plasma generation zone, agas distribution zone, an external gas source, and an external power source; the plasma generation zone is composed of a high voltage electrode, a grounding electrode, a quartz dielectric-slab, and asealed cuboid chamber; the high voltage electrode and the grounding electrode are arranged in the sealed cuboid chamber in parallel, and are designed to stretch out of the cuboid chamber through a cuboid chamber structure sealing plate, and are connected with the two electrodes of the external power source; the quartz dielectric-slab is embedded into the sealed cuboid chamber; the gas distributionzone is composed of a bottom plate provided with a sieve pore shaped vents and an insulation covering plate, so that gas can be introduced into the plasma generation zone uniformly. According to theatmospheric pressure low temperature plasma air purifying device, air is introduced into the chamber of the plasma generation zone, plasma is generated under the action of a strong electric field; theobtained plasma is abundant in active free particles, air purifying can be realized through contact of the plasma with excellent oxidizability with the external gas.

The invention relates to the field of abrasive processing, in particular to a grinding pad. The grinding pad comprises a pad body and filler. The filler comprises an adhesive and an abrasive material.The adhesive is made from a viscous-elastic material. The filler is attached to at least part of the pad body. Compared with the prior art, by adhering the abrasive material by means of the viscous-elastic material and arranging the mixed filler to the pad body of the grinding pad, the grinding pad integrates advantages of fixed abrasive particle grinding and free particle grinding, improves theprocessing efficiency, reduces the damage on the surface of a workpiece and improves the grinding precision.

The invention discloses a plasma air purification device. The plasma air purification device comprises a plasma generator, an airflow drive device and an outer power source. The plasma generator is composed of high-voltage electrodes, grounding electrodes, quartz tubes and a cuboid cavity structure. The high-voltage electrodes and the grounding electrodes are inserted in the quartz tubes, and thequartz tubes are reversely embedded in the cuboid cavity structure in parallel. When the device works, air enters the plasma generator through an insulating plate with sieve-hole-shaped ventilation holes under the action of an air suction fan, air is ionized under the action of a strong electric field, and plasma is formed. A large number of active free particles are contained in the plasma and make contact with the outside gas through strong oxidability of the active particles, and the purpose of air purification is achieved. The capability of air purification through the device can be adjusted through adjustment on power parameters or fan rotation speed, and different work parameters can be provided according to different pollution situations.