38 results about "Mass diffusion" patented technology

An apparatus and method for producing a diffusive, continuous laminar flow for particle growth via condensation of vapors with a mass diffusivity near or higher than the thermal diffusivity of the surrounding gas. In an exemplary embodiment, the method uses the condensation of water vapor onto particles suspended in air.

A work function setting metal stack includes a configuration of layers including a high dielectric constant layer and a diffusion prevention layer formed on the high dielectric constant layer. An aluminum doped TiC layer has a thickness greater than 5 nm wherein the configuration of layers is employed between two regions as a diffusion barrier to prevent mass diffusion between the two regions.

A highly convenient design support method and design support system for a heat convection field or a mass diffusion field which significantly reduce the number of times of numerical simulation required to examine the designing parameters for achieving the design purpose. The design support method includes a forward analysis step of analyzing the heat convection field or the mass diffusion field by solving an equation of the heat convection field or the mass diffusion field based on an initially set value of a designing parameter, an inverse analysis step of analyzing a sensitivity defined by a change ratio of the design purpose to a designing parameter change by solving an adjoint equation corresponding to the design purpose based on the set design purpose, and a sensitivity display step of displaying information on the sensitivity analyzed by inverse analysis step as a graphic image on the display device.

A work function setting metal stack includes a configuration of layers including a high dielectric constant layer and a diffusion prevention layer formed on the high dielectric constant layer. An aluminum doped TiC layer has a thickness greater than 5 nm wherein the configuration of layers is employed between two regions as a diffusion barrier to prevent mass diffusion between the two regions.

The invention discloses a near-field dynamic modeling method for a composite mass diffusion problem. The method comprises the following steps of 1, building an entity model; 2, cutting the entity model, determining layering and mixing region positions of materials in the model, and giving corresponding material attributes to the regions; 3, dividing the entity model into unit grids; 4, setting concentration boundary conditions of the entity model; 5, on the basis of mass diffusion near-field dynamic constitutive relation, integrating model parameters, determining a calculation method for concentration changes of a diffusing substance in a composite in the entity model, and calculating operation parameters of all units in the entity model; 6, performing submission calculation. The modelingmethod is high in precision and good in grid adaptability, all the parameters in the model are preprocessed, the operation complexity can be greatly lowered, and an algorithm is greatly optimized; themodeling method and the operation process are large in adaptability and applicable to many problems.

The invention relates to a process for increasing the concentration of lithium ions in lithium niobate which comprises, placing the lithium niobate wafers with the same constituents into crucible, covering the wafers with right amount of lithium ion crystal powder and potassium ion crystal powder so as to melt down the crystal powder, then keeping constant temperature of 1000-1200 deg. C for 1-200 hours, cooling down to room temperature, and removing the ionic crystal residues adhering to the wafers by means of liquid cleaning and polishing.

The invention discloses a recovery method of a carbon-fiber reinforced resin-base composite material with pretreatment modes, which is characterized by comprising the following steps: carrying out heat-moisture treatment, loop speed-up aging treatment or water-jet impact treatment on a carbon-fiber reinforced resin-base composite material, and carrying out supercritical reaction to obtain high-performance carbon fibers, thereby implementing recovery of the carbon-fiber reinforced resin-base composite material. The heat-moisture treatment and loop speed-up aging treatment in the method enable the interfacial structure of the material to generate new pores and cracks, so that the resin base generates the phenomena of swelling and plasticizing, the pore size in the resin base is increased, and a small amount of resin base is stripped from the carbon fibers; the water-jet impact treatment mode can lower the interfacial bonding property of the material and previously destroy the structure of the resin base; all the three modes can enhance the mass diffusion of the supercritical fluid in the resin base, accelerate the degradation of the resin base in the supercritical fluid environment and enhance the recovery efficiency of the carbon fibers.