39 results about "Phase diffusion" patented technology

A process for producing a common rail comprising a common-rail main body and a holder therefor, the main body and the holder containing, as chemical components, 0.01-0.3 mass% carbon, 0.01-0.5 mass% silicon, 0.01-3.0 mass% manganese, 0.0003-0.01 mass% boron, 0.001-0.01 mass% nitrogen, 0.01-0.5 mass%, excluding 0.01 mass%, aluminum, and 0.01-0.05 mass% titanium, having a phosphorus content reducedto 0.03 mass% or lower, a sulfur content reduced to 0.01 mass% or lower, an oxygen content reduced to 0.01 mass% or lower, and a total content of arsenic, tin, antimony, lead, and zinc reduced to 0.015 mass% or lower, with the remainder being iron and incidental impurities, and having a TLB value of 0.001% or higher. The process comprises an insert-metal insertion step, a liquid-phase diffusion bonding step, a laser peening step, and a surface-layer removal step.

The invention provides a hydrogenation catalyst and a preparation method thereof. The preparation method uses metal active components of group VIB and VIII for step load, wherein metal of group VIB is molybdenum, metal of group VIII is cobalt or nickel, and a carrier is porous oxide. Load of group VIB metal uses a corresponding soluble salt as a raw material, inorganic acid is used as an acidifying agent, and a long-chain alkyl quaternary ammonium cation is used as a precipitating agent; and Mo-based single-component loaded catalyst is prepared by firstly synthesizing an organic-inorganic hybrid material suspension, performing aqueous phase diffusion and tunnel deposition, filtering, washing, drying, and roasting. Load of group VIII metal uses a corresponding soluble salt as a raw material, and the metal is loaded onto the carried through a normal-temperature isopyknic dipping technology. The method can effectively improve load capacity of the active components and dispersiveness of the active components in the tunnels; and the prepared hydrotreating catalysts is excellent in hydrodesulfurization activity.

The invention belongs to the technical field of rare earth permanent magnets and particularly provides a process of preparing a rare earth permanent magnet Sm2Fe17NX powder. According to the process, an Fe-M powder and an Sm powder are employed as raw materials (wherein M is selected from one or more than two from Hf, Zr, Co, Nb, Cr, V, Ti, Ga, B and the like), and a solid-liquid phase diffusion reaction method is employed to prepare a Sm2Fe17 intermetallic compound, and finally the intermetallic compound is nitrided to obtain the final product Sm2Fe17NX. The process includes the steps of (1) uniformly mixing the Fe-M powder and the Sm powder; (2) performing cold-pressing moulding to the mixed raw material powder; (3) performing the solid-liquid phase diffusion reaction to the cold-pressed billet to obtain a Sm2Fe17 mono-phase block; and (4) crushing and grinding the Sm2Fe17 mono-phase block into powder, performing nitridation to the powder under an atmosphere containing nitrogen or ammonia to prepare the Sm2Fe17NX powder. On the basis of the Sm2Fe17NX powder, an aeolotropic bonded magnet having excellent performances can be produced. The process is simple in operations, is easy to control in process parameters, is environment-protective and pollution-free, and is easy to achieve large-scale production.

The invention provides a nano-refrigerant hydrate phase change cool-storage refrigerant and a preparation method thereof; surfactant is dissolved in water to prepare the water solution of the surfactant; subsequently, the refrigerant is dripped into the water solution of the surfactant and mixed till that the solution is changed from turbidity to brightness. According to the solubility of the surfactant in water and in the refrigerant, the surfactant can be dissolved in the water and can also be dissolved in the refrigerant. Under static state, the water phase and the refrigerant phase are uniformly mixed in microscopic scale to augment the two-phase diffusion interface, thus promoting the growth of the hydrate crystal. The system can lead the water phase and the refrigerant phase to be mixed uniformly without applying mixing, disturbing and external field; the refrigerant phase is dispersed in water in the form of micelle or (and) microemulsion; and alternatively, the water phase is dispersed in the refrigerant phase in the form of micelle or (and) microemulsion; the dripping size of the dispersing phase is 100nm or less. The hydrate phase change cool-storage refrigerant does notdelaminate after being placed for a long time, is single-dispersion system with stable thermal-mechanics performance and has the appearance of transparent or semi-transparent solution.

The invention discloses a preparation method of Spiro-OMeTAD monoclinic crystals, comprising the following steps: selecting a special solvent, adopting an anti-solvent vapor phase diffusion assisted crystallization method to induce Spiro-OMeTAD crystallization, and under the action of the anti-solvent gradually volatilizing and diffusing, the solution Gradually saturated with precipitation of Spiro‑OMeTAD monoclinic crystals. The Spiro-OMeTAD monoclinic crystal prepared by the method provided by the present invention has higher spatial symmetry, and it is found through the conductivity test that it has better conductivity than the triclinic crystal.

The invention discloses a steady-state solid-liquid two-phase solute concentration distribution model in a continuous reverse flow mass transfer process. The volume flow of a solid phase in a model independent variable is changed; Volume flow rate of liquid phase, the retention time of the solid phase in the continuous reverse flow mass transfer space is reserved, the coefficient of an equation set and the intermediate parameter of a matrix equation are obtained again, and a solute concentration distribution matrix meeting the expected requirement, the volume flow of the solid phase corresponding to the distribution matrix, the volume flow of the liquid phase and the retention time of the solid phase in the continuous reverse flow mass transfer space are obtained; The model utilizes a CFDmodel to obtain a flow field matrix. performing finite element redivision on the continuous countercurrent reaction process on the basis; meanwhile, solid-liquid two-phase diffusion mass transfer andconvection mass transfer are considered, a solid-phase, liquid-phase and boundary solute conservation equation set is established, compared with a mass transfer process directly defined in a CFD original program, calculation resources are greatly saved, the calculation efficiency of concentration field distribution is improved, and the method is more convenient to write into hardware to carry outlow-cost operation.

Phosphorus diffusion formed PN junction is setup on P type silicon chip. There is silicon nitride layer, or surface passivation layer of silica, reflection reducing coating and positive electrode on front face. Characters are that through P type punctual alloy diffusion zone, back metal layer of silicon chip constitutes ohmic contact. Preparing method includes steps: selecting P type chip; preparing knap surface and cleaning; forming PN junction through phosphorus diffusion; etching and corroding edges by using plasma; developing silicon nitride or silica at both sides; preparing point contacted dense P+ zone at back side through screen printing by using solid-solid phase diffusion or selective gaseous phase diffusion; printing and sintering electrode through screen printing; adding metal layer to full back side. The solar cell reaches indexes: open circuit voltage larger than 650mV, current density larger than 38mA / cm2, fill factor as 74úÑ-78úÑ and conversion efficiency 18úÑ-20úÑ.

The invention relates to a device for measuring the diffusion coefficient of CO2 in the process of diffusing CO2 from a water phase to an oil phase. The high-temperature and high-pressure visible diffusion device is vertically provided with a steel body partition, which divides the U-shaped high-temperature and high-pressure visible diffusion device into a left space and a right-side space connected at the bottom. The U-shaped high-temperature and high-pressure visible diffusion device The inner bottom is provided with a temperature measurement point, a pressure measurement point, and a lower outlet. The device also includes a pressure acquisition system, a back pressure gas tank, a heater, and a temperature control system. The principle of the invention is reliable, the operation is simple, and the influence caused by the difference in the density of oil, gas, and water is overcome. , the pressure drop method for measuring the gas-liquid two-phase diffusion coefficient is applied to the measurement of the gas diffusion coefficient between the water phase and the oil phase.