33results about How to "Increase the number of particles" patented technology

A system for cold gas dynamic spraying of particulate material has a de Laval nozzle and two or more radial particle inlets located between the throat and the outlet of the nozzle, the two or more particle inlets arranged symmetrically around a linear flow path of the nozzle. Blocking of the inlets is reduced by controlling pressure of particle carrier gas to provide a stable particulate material injection pressure before and during introduction of working gas into the nozzle, and/or by clearing the particle inlets of residual particles after a spraying process. Such a system and associated method combines benefits of both downstream and upstream cold gas spray systems. Further, a nozzle for spraying particulate material having a cross-sectional shape that is narrower in a middle section compared to edge sections provides coatings with superior cross-sectional profiles.

The invention discloses a GLONASS phase inter-frequency bias real-time tracking and precise estimation method based on particle filtering. The method comprises the following steps that step 1: data preprocessing: the satellite ephemeris and the pseudo range observation value and the phase observation value of the current ephemeris cloud are imported; step 2: a double difference pseudo range and carrier phase observation equation is established, and a single epoch normal equation or a previous epoch accumulation normal equation is obtained after linearization; step 3: the phase bias in the normal equation is corrected according to the particle value to solve the normal equation; and the particle filtering weight is updated, and the value of the phase inter-frequency bias rate and the particle mean square root are calculated; and step 4: the steps 1-3 are repeated to perform real-time tracking or precise estimation of the value of the phase inter-frequency bias rate; and phase inter-frequency bias correction is performed through the value of the phase inter-frequency bias rate after filtering convergence, and the integer ambiguity is fixed so as to realize precise estimation. Real-time tracking of the inter-frequency bias and GLONASS precise positioning without receiver type difference can be efficiently realized.

The invention discloses an Er<3+>/Yb<3+> co-doped yttrium lithium fluoride monocrystal and a preparation method thereof. The yttrium lithium fluoride monocrystal is a rare earth ion Er<3+>/Yb<3+> co-doped monocrystal; the molecular formula is LiY(1-x-y)ErxYbyF4, wherein x is greater than or equal to 0.008 and less than or equal to 0.085, and y is greater than or equal to 0.002 and less than or equal to 0.170; the segregation coefficients of Yb<3+> and Er<3+> in the yttrium lithium fluoride are about 1, and efficient intermediate infrared laser of 2.7 microns can be output; and the yttrium lithium fluoride monocrystal has high transmittance of intermediate infrared laser, has better thermal, mechanical and chemical stabilities than those of glass state materials and has the characteristics of low phonon energy, high optical transmittance of wavebands with width of 300-5500nm, less color center forming amount, low thermal lens effect and the like, thereby being more easily processed and more suitably used in laser devices. In the preparation method disclosed by the invention, a sealing crucible falling technology is used, so that the operation is simple; the raw material is fluorated at high temperature in a sealed water-free and oxygen-free environment, so that the crystal is isolated from air and water vapor during the growth; and therefore, the high-quality Er<3+>/Yb<3+> co-doped LiYF4 monocrystal containing little OH<-> ion and oxide is obtained.

The invention discloses a rock dust polymerization and moisture-preservation inhibitor for coal mines and an adding device thereof. The rock dust polymerization and moisture-preservation inhibitor comprises the following components in percentage by weight: 0.05%-0.07% of cocamidopropyl betaine, 0.05%-0.07% of magnesium chloride, 0.05%-0.07% of sodium fatty alcohol polyoxyethylene ether carboxylate and the balance being water. The invention further provides an automatic adding device of the rock dust polymerization and moisture-preservation inhibitor for the coal mines. The cocamidopropyl betaine and the sodium fatty alcohol polyoxyethylene ether carboxylate have good wettability; after cocamidopropyl betaine and the sodium fatty alcohol polyoxyethylene ether carboxylate are compounded, the surface tension of water can be greatly reduced and the contact possibility of fog drops and dust particles is promoted; the magnesium chloride has a good moisture preservation performance so that the moisture preservation content of the captured dust particles is greatly enhanced, and a secondary dust raising phenomenon caused by water evaporation is prevented.

The invention discloses a solid oxide fuel cell gradient porosity anode and a solid oxide fuel cell. The solid oxide fuel cell gradient porosity anode comprises an anode function layer, an anode transition layer and an anode support layer which are connected in sequence from top to bottom. The opening porosity of the anode transition layer is greater than or equal to the opening porosity of the anode function layer. The opening porosity of the anode transition layer is smaller than or equal to the opening porosity of the anode support layer. The opening porosity of the anode function layer, the opening porosity of the anode transition layer and the opening porosity of the anode support layer are in gradient gradual decrease along a horizontal direction, or the opening porosity of the anodefunction layer, the opening porosity of the anode transition layer and the opening porosity of the anode support layer are in gradient gradual increase. The anode is characterized by relatively low activation polarization, concentration polarization and ohm polarization loss. The fuel cell is characterized by high output electrical property and high intensity.

The invention provides a hot working method for improving mechanical properties of medium carbon steel, and relates to the technical field of metal material science. The hot working method comprises the step: the medium carbon steel is sequentially subjected to high-temperature and high-pressure heat treatment and low-temperature and high-pressure heat treatment. The medium carbon steel is subjected to high-temperature and high-pressure heat treatment to obtain a fine martensite structure with the high dislocation density, dislocation provides more positions for precipitation of carbide in thesubsequent low-temperature and high-pressure heat treatment process, and the number of precipitated carbide particles is increased; and through low-temperature and high-pressure heat treatment, the diffusion coefficient of atoms is decreased under the high pressure effect, thus the number of the precipitated carbide particles is large, the precipitated carbide particles are not prone to growing up and thus are finer and more dispersed, the dispersion enhancement effect is enhanced, and the hardness and strength of the medium carbon steel are increased. Compared with the same process normal-pressure heat treatment, the hardness value and compression yield strength of the medium carbon steel treated through the hot working method are increased by 10.00-12.12% and 10.77-14.33% correspondingly.

The invention discloses a preparation method of a cement decorated hanging plate. The method comprises the following steps of mixing and stirring ferrous chloride, ferric chloride, copper chloride, sodium citrate, polyvinyl alcohol and distilled water, transferring the mixture into a reaction kettle for reaction, and performing centrifugal separation to obtain CuFeO2 nano-cube water dispersion; adding silver nitrate into the CuFeO2 nano-cube water dispersion, stirring the mixture for reaction, and performing centrifugal separation to obtain silver-plated CuFeO2 nano-cube; stirring the silver-plated CuFeO2 nano-cube with sodium bentonite to obtain an antibacterial agent; adding polycarboxylate water reducer into slag and steel slag separately, adding water into the two mixtures and performing wet grinding, and then mixing the two mixtures to obtain a mixture; adding cement clinker, ceramsite and triethanolamine into the mixture and the antibacterial agent, adding water into the mixtureand the antibacterial agent, and mixing and stirring the mixture and the antibacterial agent to obtain decorated hanging plate slurry; and pouring the decorated hanging plate slurry into a template paved with a transfer printing film with a specific pattern, keeping standing, tearing down the transfer printing film, and carrying out high-pressure washing on the surface until a pattern is displayedto obtain the cement decorated hanging plate. The cement decorated hanging plate has the advantages of no toxicity, no smell, no cracking, and no biological parasitism; the plate has various patterns, appearance is attractive, weight is light, and hardness is high; and the plate is not prone to breakage, easy to carry and wide in application field.

The invention discloses a high elastic modulus and high plasticity aluminum-silicon casting alloy, a preparation method and application, and belongs to the field of casting aluminum alloys. The high elastic modulus and high plasticity aluminum-silicon casting alloy includes components and their mass percentages as follows: Si is 14-18%, Cu is 0-0.4%, Mg is 0.2-0.5%, and Mn is 0-0.5% , Cr is 0.1-0.5%, Zr is 0-0.25%, Zn is 0-0.5%, Ti is 0.05-0.25%, Re is 0-0.5%, and the balance is Al and inevitable impurities. The high elastic modulus and high plasticity aluminum-silicon casting alloy utilizes P to effectively transform primary Si, and has the characteristics of light weight, good casting performance, high elastic modulus and high elongation, and high tensile strength strength. The high elastic modulus and high plasticity aluminum-silicon cast alloy can be applied to automobile parts with special requirements for elastic modulus and plasticity.

A kind of high-elongation RuT400 vermicular graphite cast iron and its production process, using pig iron, scrap steel, nickel, ferrosilicon, recarburizer, or pig iron, recycled material, scrap steel, recarburizer as raw materials, put it into an intermediate frequency furnace for smelting , get qualified molten iron, add recarburizer and take it out of the furnace; carry out baking operation on the spheroidizing treatment bag, fill in vermicularizing agent, inoculant and iron filings to keep warm, pour molten iron into the vermicularizing treatment bag, when the vermicularizing treatment bag When the amount of molten iron poured into the medium accounts for 2/3 of the total mass of molten iron, add an inoculant for secondary inoculation, and continue to pour in the remaining molten iron; flow inoculant to obtain vermicular graphite cast iron. The advantages are: simple process and easy operation. The obtained vermicular graphite cast iron has a tensile strength of more than 400MPa, a yield strength of more than 300MPa, and a breaking elongation of more than 2.5%. Its elongation at break is more than 2.5 times that required by the national standard RuT400A.