654results about How to "Promote nucleation" patented technology

The invention relates generally to processes for producing electrically conductive noble metal thin films on a substrate by atomic layer deposition. According to one embodiment of the invention a substrate with a surface is provided in a reaction chamber and a vaporised precursor of a noble metal is pulsed into the reaction chamber. By contacting the vaporised precursor with the surface of the substrate, no more than about a molecular layer of the metal precursor is formed on the substrate. In a next step, a pulse of molecular oxygen-containing gas is provided in the reaction chamber, where the oxygen reacts with the precursor on the substrate. Thus, high-quality metal thin films can be deposited by utilising reactions between the metal precursor and oxygen. In one embodiment, electrically conductive layers are deposited in structures that have high aspect ratio vias and trenches, local high elevation areas or other similar surface structures that make the surface rough.

The invention provides a preparation method of a polycrystalline silicon ingot. The preparation method comprises the following steps that a core source is arranged at the bottom of a crucible, and a core source layer is formed; silicon materials in a molten state are arranged on the core source layer; and the temperature in the crucible is controlled to gradually rise in a direction vertical to the upward direction form the bottom of the crucible, the temperature gradient is formed, the silicon materials in the molten state form core crystallization by utilizing the core source, and the polycrystalline silicon ingot is prepared. The invention also provides high-quality polycrystalline silicon ingot obtained by the preparation method, a polycrystalline silicon slice obtained through the preparation of the polycrystalline silicon ingot and the crucible for polycrystalline silicon ingot casting. The polycrystalline silicon ingot prepared by the preparation method has the advantages that the crystalline size is uniform and regular, the dislocation density is low, and in addition, no obvious pine-tree crystals or twin crystals exist.

The invention relates to a method for preparing a polymeric open cell foam material. By virtue of a supercritical fluid foaming technology, by way of mould foaming, under the premise that other performances of a polymer are not affected, nanoparticles with double effects of a nucleating agent and a cell-opening agent are added, so that the nucleation density and the aperture ratio of the polymer are remarkably improved. By adding a cell-opening auxiliary agent, on the one hand, an effect of a heterogeneous nucleating agent can be exerted to accelerate cells to be nucleated and to increase the cell density; on the other hand, the cell-opening auxiliary agent is a good cell-opening agent which promotes cell walls to break and increases the aperture ratio. The whole process provided by the invention is green and environmental-friendly and free of chemical residues; moreover, the pressure and temperature in a swelling treatment process can be adjusted to prepare the open cell foam material with different cell sizes. The polymer provided by the invention has a lot of open cells and is adjustable in cell size.

A clarifying agent composition comprises a diacetal powder and an organosilane treated fume silica having a pH value of 5.5 to 8, measured in a 4% w/w dispersion in 1:1 mixture of water-methanol. The diacetal has the general structure formula (I), (II), (III), (IV) or (V),

This invention also intents to provide a new manufacturing method for preparing superfine powdery diacetal composition with high dispersion characteristic the use of said compositions for preparing polyolefin plastic article without the visible white spots on the surface of the corresponding article.

A process for preparing crystalline sugar by providing a solution of a solvent and sugar, exposing the solution to a magentic field having a strength which is sufficient to impart improvements in the processing of the sugar or the properties of the resulting crystalline sugar product, and providing conditions suitable for crystallization to obtain a substantially crystalline sugar product. The magnetic field strength is sufficient to influence at least one of morphology, size, nucleation rate or, crystallinity of the crystalline sugar product.

The invention relates to a high oil absorption polyurethane foam which comprises the following components in parts by weight: 20 to 40 parts of isocyanate, 35 to 60 parts of polyol, 0.5 to 3 parts of catalyst, 0.5 to 3 parts of foam stabilizer, 5 to 10 parts of foaming agent, 2 to 10 parts of opening agent,5 to 20 parts of flame retardant, 5 to 15 parts of silicon rubber spherical micro powder and 0.5 to 2 parts of coupling agent. The preparation method comprises the following technology steps of weighing, prepolymerization, dispersing, polymerization foaming reaction, curing and peeling at room temperature and cutting. The high oil absorption polyurethane foam can be used for the absorption and recycle of various oil products (crude oil, engine oil, diesel fuel, gasoline, kerosene and the like) on water surfaces, ground or surfaces of other objects, and various oil soluble organic compounds (benzene, methylbenzene, dimethylbenzene, chloroform, nitrobenzene, chlorobenzene and the like). The invention has the advantages of simple technology and low cost, obviously improves the dispersing effect of the silicon rubber spherical micro powder in a polymerization system by using ultrasonic technique, and greatly increase the oil absorption quantity and oil absorption rate of the polyurethane foam by adding the silicon rubber spherical micro powder.

The invention discloses a honeycomb-ceramic-type monolithic catalyst, and preparation method and application thereof. The monolithic catalyst takes honeycomb ceramic as a carrier, a Beta molecular sieve is coated on the surface of the honeycomb ceramic and taken as a coating layer, and then active component, namely precious metal, is loaded on the surface of Beta molecular sieve; the active component of the precious metal is one or two selected from palladium or platinum; in the honeycomb-ceramic-type monolithic catalyst, the mass ratio of the coating layer of the Beta molecular sieve to the honeycomb ceramic is 0.02-0.2:1, the mass ratio of the precious metal to the coating layer of the Beta molecular sieve is 0.02-0.2:1, the honeycomb ceramic is cordierite honeycomb ceramic; and in the invention, the high-silicon or full-silicon Beta molecular sieve is taken as the coating layer of the monolithic catalyst, and has the characteristics of good water resistance, high heat stability andthe like, and the monolithic burning catalyst taking the Beta molecular sieve as the coating layer can keep better activity and stability under high temperature, and suitable for being taken as catalytic combustion catalyst for application.

Techniques for forming a thin coating of a material on a carbon-based material are provided. In one aspect, a method for forming a thin coating on a surface of a carbon-based material is provided. The method includes the following steps. An ultra thin silicon nucleation layer is deposited to a thickness of from about two angstroms to about 10 angstroms on at least a portion of the surface of the carbon-based material to facilitate nucleation of the coating on the surface of the carbon-based material. The thin coating is deposited to a thickness of from about two angstroms to about 100 angstroms over the ultra thin silicon layer to form the thin coating on the surface of the carbon-based material.

The invention relates to a light gauge aluminum foil woolen produced with AL-Ti-C wire refiner and a preparation method. The iron-silicon rate of the woolen ranges between 4.3-5.3. The process of the preparation technology is sequentially as follows: material preparation, batching, feeding, melting, stirring, primary refining of a smelting furnace, drossing, sampling, ingredient adjustment, secondary refining of the smelting surface, drossing, converter, primary refining in a holding furnace, intensified refining in the holding furnace, online addition of AL-Ti-C wire intermediate alloy refiner, Ar online degassing, filtration, continuous casting into 7.0-7.5mm cast rolling plates, cold rolling, high-temperature homogenizing annealing of a primary sheet strap, cold rolling, trimming of a rereeling machine, cold rolling, intermediate annealing of a secondary sheet strap, cold rolling to 0.26-0.32mm, trimming of the rereeling machine, and packaging. The cost is low, the quality is stable, the calendaring of the aluminum foil and grain refining are good in effect, and the probability of generating pinholes is low during production.

The invention discloses a manufacturing device for light alloy or light metal semi-solid slurry and a method for manufacturing the semi-solid slurry through the device. The manufacturing device for the light alloy or light metal semi-solid slurry comprises a smelting furnace, a runner, a mechanical stirring device, an inert gas stirring device, a powder spray device and a heating device. The semi-solid slurry manufacturing device reasonable in structure is designed, continuity for manufacturing the semi-solid slurry is good, and products can be cast industrially and continuously in a large scale by applying a semi-solid pressure casting or squeeze casting forming method. According to the manufacturing method for the semi-solid slurry, efficiency for manufacturing the light alloy or light metal semi-solid slurry is high, energy consumption is less, cost is low, and the manufactured semi-solid slurry cannot generate oxide inclusions, and is even in organization and excellent in quality.

The invention discloses a Co3O4 nano lamellar material and a preparation method and application thereof. The preparation method comprises the following steps of: mixing cobalt salt, a surfactant, a precipitator and deioned water in stoichiometric ratio; transferring the mixed solution into a reaction kettle and carrying out hydro-thermal reaction for 17.5-18.5 hours at 115-125 DEG C; and then washing and drying to obtain a powdery mixed precursor; and carrying out heat treatment on the powdery mixed precursor in air to finally obtain the Co3O4 nano lamellar material. The prepared Co3O4 material is of a regular nano lamellar structure, and can be applied to the negative electrode of a chargeable lithium ion battery so as to improve the storage capacity of lithium.

Water to be desalinated or otherwise purified is enriched by having hydrate-forming substance dissolved into it, without causing hydrate to form. Hydrate kernels are brought into contact with the enriched water to be treated, and the hydrate kernels grow outwardly into the water to be treated by incorporating dissolved molecules of the hydrate-forming substance and water from the water to be treated. Thus, substantially solid, generally spherical hydrate masses, which are preferred for hydrate-based desalination or purification, can be formed. Hydrate-forming substances can be dissolved into the water to be treated under conditions not conducive to formation of hydrate, such that hydrate does not form, using vigorous means. Hydrate-forming substance is also preferably dissolved into the water to be treated under conditions suitable for hydrate to form, but without causing hydrate to form, e.g., by being infused into the water to be treated using infusion membranes.

The invention provides a preparation method for a rear-earth magnesium alloy. The preparation method comprises the following steps of: casting a magnesium melt, extruding and forming after solution treatment, then carrying out cold-rolling and ageing treatment to obtain the rear-earth magnesium alloy, wherein the rear-earth magnesium alloy comprises Mg, Nd, Gd, Y, Zn and Zr. Compared with the prior art, cold-rolling and ageing treatment is carried out after carrying out solution treatment, extruding and forming, so that a great number of beta phases and LPSO phases exist on a crystal boundary, the crystal boundary is pinned to prevent crystalline grains from growing in a transformation process, crystalline grains in the alloy are refined, and therefore, yield strength of the rear-earth magnesium alloy is improved; the rear-earth magnesium alloy has the LPSO phases with 14H structures, and is regularly distributed along extruding direction; stability of the boundary improves strength and toughness of the rear-earth magnesium alloy; moreover, high-density dislocation is introduced in cold-rolling, and nucleation of beta' phases in an ageing process is promoted, so that ageing hardening effect of the alloy is improved; meanwhile, the beta' phases can be more refined by the cold-rolling.

The invention provides a device and method for preparing light alloy semi-solid slurry through air-cooling multi-tube stirring. The device comprises a crucible for containing light alloy melt, an air-cooling multi-tube stirring mechanism and a lifting mechanism. The air-cooling multi-tube stirring mechanism comprises a stirring mechanism body and an air supply mechanism. The stirring mechanism body is composed of a stirring motor, a multi-tube stirring rod and a bevel gear drive group which are arranged on a lifting platform. The multi-tube stirring rod is supported and positioned through a bearing. The air supply mechanism is composed of an air guide tube and an air supply device. One end of the air guide tube is combined with the air supply device, and the other end of the air guide tube is inserted into the multi-tube stirring rod. Multiple stirring pipes are filled with air entering the air guide tube. The device is simple in structure, convenient to use, high in efficiency, safe, reliable, wide in applicable scope in alloy and especially suitable for preparing large-volume semi-solid alloy slurry, the melt temperature, the stirring speed, the number of the stirring tubes, the inner diameter, the wall thickness, the stirring time and air ventilation quantity can be accurately controlled, and industrial application and popularization are facilitated.

The invention relates to a three-level aging heat treatment process for nanometer magnesium alloy. The alloy comprises the following components in percentage by mass: 6-13% of gadolinium, 2-6% of yttrium, 0.3-0.8% of zirconium, and the balance of magnesium and inevitable impurities. The nanometer magnesium alloy obtained by extrusion-fast cold forging with average crystallite size of 40-100 nm is subjected to level 1 aging heat treatment at 140-170 DEG C for 4-8 hours, and then the alloy subjected to level 1 aging treatment is subjected to level 2 aging heat treatment at 150-180 DEG C for 5-10 hours, finally the alloy subjected to level 2 aging treatment is subjected to level 3 aging heat treatment at 200-250 DEG C for 10-30 hours. Compared with the nanometer magnesium alloy without aging treatment, the strength and the yield strength of the alloy subjected to three-level aging heat treatment is increased by 100-105 MPa and 123-135 MPa respectively, and the alloy has a strength of extension of 705-750 MPa and yield strength of 670-715 MPa.

Semiconductor apparatus comprising a substrate having a substrate surface; a first dielectric layer comprising molecules of a first compound, the molecules of the first compound having first ends and second ends, the first ends being covalently bonded to a first region of the substrate surface, the second ends having aromatic regions; and a polycrystalline semiconductor layer comprising organic semiconductor molecules with aromatic portions, the polycrystalline semiconductor layer being on the first region of the substrate. Integrated circuits comprising apparatus, and methods for making apparatus and integrated circuits.

The invention aims at designing an ultrasonic vibration activation assisted sintering microwave sintering furnace according to the practical needs of new material research and development for the sintering technology and the advantages of the ultrasonic technology. The ultrasonic vibration activation assisted microwave sintering furnace is composed of a microwave source, magnetrons, a waveguide tube, a wave leading crucible or a common high-temperature crucible, an amplitude-change pole, an amplitude-change pole supporting frame, an ultrasonic generator, an ultrasonic transducer and the like. Electric signals generated by the ultrasonic generator are converted into ultrasonic vibration through the ultrasonic transducer, the ultrasonic vibration is transmitted to a sample to be sintered in the wave leading crucible or the common high-temperature crucible through the amplitude-change pole and the crucible, the sample to be sintered is in the ultrasonic vibration state in the microwave sintering process, material particles of the sample to be sintered are vibrated at a high speed under the microwave sintering temperature through the microwave radiation action, crystalline grains of the sample to be sintered are promoted to be quickly and evenly nucleated and grow or part of matter is evenly melted for quickly filling a gap. By means of the ultrasonic vibration activation assisted microwave sintering furnace, the sintered microstructure of a block sample can be more uniform and more compact, and the sample is better in the microstructure.

The invention discloses a method for preparing a yttrium barium copper oxide superconducting film with high critical current density, which comprises the following concrete steps: a, preparing a precursor solution, which is to dissolve yttrium acetate, barium acetate, copper acetate and acetate of an impurity element into propionic acid according to the proportion that the stoichiometric ratio of yttrium: barium: copper: impurity element is 1: 2: 3-X: X (the X is more than or equal to 0.0002 and less than or equal to 0.008) to obtain the precursor solution, and the impurity element is one of Co, Fe, Zn, Ni, and Li; b, adding a polymer material polyvinyl butyral (PVB) into the precursor solution obtained in a step to obtain a coating colloid; c, coating and drying the coating colloid on a substrate to form a film; and d, performing thermal decomposition treatment on the substrate with the film prepared in c step and then imaging thermal treatment to obtain the YBCO superconducting film. The yttrium barium copper oxide superconducting film prepared by the method has high biaxial texture, smooth and compact surface, high critical current density under a magnetic field, low cost, and simple process, and is suitable for mass industrial production.

The invention relates to ferritic stainless steel with good wrinkle resistance and a production method thereof. The ferritic stainless steel comprises the following components by weight percentage: less than or equal to 0.02 percent of C, less than or equal to 0.02 percent of N, 0.10-0.50 percent of Si, 0.10-0.50 percent of Mn, less than or equal to 0.03 percent of P, less than or equal to 0.01 percent of S, 16-30 percent of Cr, less than or equal to 1.00 percent of Ni, 0.15-0.40 percent of Nb, less than or equal to 16 percent of Nb/(C+N), less than or equal to 0.010 percent of O, less than or equal to 1.00 percent of Cu and the rest being Fe and inevitable impurity elements. Since the stabilization element Ti which can damage the surface quality of continuous casting and increase the brittle transition temperature is not added, and only the stabilization element Nb is added, the invention can reduce the quantity of casting blank repair and the strip breakage risk, improve the surface quality and overall performance, eliminate the wrinkle of the surface of the ferriticstainless steel cold-rolled plate with a medium and high Cr content, reduce the wear and repair loss during the production process, and decrease the production cost.

An original wafer, typically silicon, has the form of a desired end PV wafer. The original may be made by rapid solidification or CVD. It has small grains. It is encapsulated in a clean thin film, which contains and protects the silicon when recrystallized to create a larger grain structure. The capsule can be made by heating a wafer in the presence of oxygen, or steam, resulting in silicon dioxide on the outer surface, typically 1-2 microns. Further heating creates a molten zone in space, through which the wafer travels, resulting in recrystallization with a larger grain size. The capsule contains the molten material during recrystallization, and protects against impurities. Recrystallization may be in air. Thermal transfer through backing plates minimizes stresses and defects. After recrystallization, the capsule is removed.