192results about How to "Increase interface area" patented technology

A thermally-conductive interface for conductively cooling a heat-generating electronic component having an associated thermal dissipation member such as a heat sink. The interface is formed as a self-supporting layer of a thermally-conductive material which is form-stable at normal room temperature in a first phase and substantially conformable in a second phase to the interface surfaces of the electronic component and thermal dissipation member. The material has a transition temperature from the first phase to the second phase which is within the operating temperature range of the electronic component.

In a flip chip type light-emitting element of the present invention, an n type contact electrode 14 is formed on an n layer 11 exposed in a comb-tooth shape, a light transmission electrode 15 made of an ITO is formed over the entire surface of an upper surface of a p layer 13 and twenty pad electrodes 16 are formed at prescribed intervals on the light transmission electrode 15. The plane form of the pad electrode 16 has four branches 16b protruding in the form of a cross from a circular central part 16a and the adjacent pad electrodes 16 connected to each other by the branches 16b.

The invention discloses a preparation method of a compound graphite material for a lithium ion secondary battery. The preparation method comprises the following steps of: firstly pouring natural graphite, a binding agent and a graphite catalyst which are taken as raw materials into a roller furnace, wherein the roller furnace rotates all the time in a raw material pouring process; then progressively heating the raw materials, namely heating the raw materials in the roller furnace by adopting a progressive heating mode while the roller furnace rotates in a heating process, and then carrying out natural cooling to normal temperature after the raw materials in the roller furnace are heated; and finally carrying out graphitizing treatment on the raw materials, thus the binding agent forms artificial graphite, and the artificial graphite forms a coating on natural graphite particles, so as to form a shell-core structure, and compound particles of the shell-core structure are further spliced to form compound graphite particles with the required grain diameter. The compound graphite material prepared by the invention is of the shell-core structure with the natural graphite as an inner core and an artificial graphite layer as a coating, and the compound graphite has good isotropy, high capacity, high compactness, excellent multiplying, low temperature and cyclic performances and low electrode expansion. The preparation method of the compound graphite material for the lithium ion secondary battery adopts a method that coating and splicing are carried out at the same time, the preparation method is simple and practicable, and the cost is low.

A gel system comprising a fractal network of nanoparticles and macroscopic particles is disclosed. The gel system is capable of forming an “optical gel” effective to blurrfine lines and wrinkles as a consequence of the size domain differences between the fractal particles and the macroscopic particles. Cosmetic compositions comprising such gels and methods for their use are also disclosed.

The technical scheme discloses high brightness LED structure with graphic surface and microstructure. Using Nano pressing technique prepares each graphic film from organic material on luminous surface of LED so as to form microstructure on LED surface in favor of transgression of emitting light from active region, for example micrographics with structure or coarsening, and photon crystal structure. Introducing the said micrographics on surface makes interfacial area of light emergence medium increase. The increased surface presents great lot small areas unordered arranged. Emergence of light from active region and interface of medium is at random in a certain extent. The invention improves directions of emergence light, increases probability of emergence so as to raise light extraction efficiency and external quantum efficiency of LED.

An extensible sleeve having a first sleeve portion and a second sleeve portion is provided. The extensible sleeve is adapted to be used in a protective garment. A plurality of creases are disposed along one of the sleeve portions forming pleats. The other sleeve portion is placed internal and coincident to the first and the pleats are affixed to an outer surface of this internal sleeve portion. Pulling upon the sleeve portion would cause a partial to a total unfolding of at least one pleat resulting in a lengthening of the sleeve. The pleats may also prove useful in retaining a glove upon the sleeve.

A well cementation flushing liquid system suitable for an oil-based drilling fluid and a preparation method thereof. The invention mainly solves the defects of low flushing efficiency, poor wetting conversion capability and poor interface cementing quality in the flushing liquids in the prior art. The flushing liquid system comprises the following components, by weight: 100 parts of clear water, 0.8-1.2 parts of an anionic surfactant, 0.6-0.8 parts of a nonionic surfactant, 0.7-1.0 part of a cosurfactant, 6.0-10.0 parts of an oil phase, 8.0-12.0 parts of a salt water phase, 0.15-5.0 parts of a polymer, 0.0-150 parts of a weighting agent and 1.0-2.5 parts of salt. The flushing liquid system is adjustable in density within 1.01-1.90 g/cm<3> and is 20-130 DEG C in available temperature range. The flushing liquid system can quickly remove residual oil-based drilling fluid, is strong in wetting conversion capability, ensures cementation between cement rings and an annular space, and is wide in application prospect.

The invention relates to a solar cell with a small organic molecule mixture heterojunction, which comprises a transparent insulating layer, wherein a transparent electrode layer, a first buffer layer, a first photosensitive layer, a second photosensitive layer, a third photosensitive layer, a second buffer layer and a high-reflectivity electrode layer are sequentially laminated at one side of the transparent insulating layer; and a lower transition layer is formed at the other side of the transparent insulating layer. The mixture heterojunction and the lower transition layer are combined together, so that the solar spectrum utilization ratio of the organic solar cell and exciton dissociation efficiency can be improved; meanwhile, the high-reflectivity electrode is reasonable utilized, the optical field distribution in the device can be adjusted, therefore, the solar cell can work at an optimum state. The invention also relates to a preparation method of the solar cell.

Capacitors include a first electrical terminal that has fins formed from doped semiconductor on a top layer of doped semiconductor on a semiconductor-on-insulator substrate; a second electrical terminal that has an undoped material having bottom surface shape that is complementary to the first electrical terminal, such that an interface area between the first electrical terminal and the second electrical terminal is larger than a capacitor footprint; and a dielectric layer separating the first and second electrical terminals.

The invention discloses an improved method for preparing cyclohexanol and cyclohexanone. The invention is characterized in that the decomposition reaction of cyclohexyl peroxide is accomplished with two steps; during the first decomposition reaction, the flow of circulated alkaline is equal to or larger than that of cyclohexane oxydic liquid, thereby ensuring the alkaline water phase to become a continuous phase of the material in the first decomposition reaction; the cyclohexane phase is dispersed; the decomposition reaction is accomplished under an emulsification state, or is called even phase decomposition; the compound from the decomposition reaction is rough separated through a hydrocyclone separator; a large amount of alkaline liquid is separated from the lower outlet of the hydrocyclone separator to be recycled; the material of cyclohexane from the upper outlet of the hydrocyclone separator is changed to the continuous phase, while little alkaline liquid is changed into the dispersing phase; the waste alkaline liquid is separated by lifting a separation groove through gravity; the second decomposition reaction is then accomplished to ensure a full decomposition reaction. With the technical improvement, the total mol yield of the oxidation of cyclohexane prepared cyclohexanol and the cyclohexanone device is increased by 5 percent.

A protective garment is provided consisting of a garment body having at least one sleeve, a glove associated with the sleeve, and an adhesive disposed upon a surface of the glove, the sleeve, or both. The adhesive forms an interface between the two surfaces. The adhesive has sufficient adhesion to remain affixed substantially to the surface to which it is applied while having sufficient strength to enable donning of the garment without damaging the interface. The glove is removable from the garment body by breaking the interface, without causing damage to the surfaces of the glove or garment body, and without migration of the adhesive from the surface to which it was applied.

This invention discloses a process for preparing a nylon/clay nanocomposite fuel tank. In the process, in situ polymerization is employed for the insertion into the interlayers of the nanocomposite so that clay can be dispersed to the degree of nanoscale in the nylon matrix, which results in a very large interfacial area. The ideal adhesion between the dispersed inorganic phase and the polymer matrix can eliminate the problem of thermal expansion coefficient mismatch between the inorganic phase and the polymer matrix, and sufficiently exploit the intrinsic good mechanical properties and heat durability of the inorganic phase. The composite fuel tank prepared by this invention exhibits improved heat-resisting property while has little influence on the mechanical properties of the matrix material.

Belonging to the technical field related to preparation of metal oxide catalysts, the invention discloses a method for improving the catalyst activity and selectivity based on atomic layer depositiondirectional regulation. The method includes: growing and distributing noble metal nanoparticles uniformly on the surface of a reaction carrier to obtain a noble metal loaded catalyst sample; and depositing a metal oxide assistant on the surface of the noble metal loaded catalyst sample by atomic layer deposition reaction method to obtain a needed catalyst product, and making targeted design to thespecific process parameters of the atomic layer deposition reaction at the same time. The method provided by the invention can enable the oxide assistant to carry out selective deposition on a plurality of crystal planes of the active metal surface, realizes incontinuous coating at special position, at the same time effectively improves the activity and selectivity of the catalyst, and consequently is especially suitable for the application occasion of preparing a catalyst for preparation of a C<2+> oxygenated compound from synthesis gas.

The invention relates to organic-inorganic nano composite resin and a preparation method thereof, belonging to the technical field of biomedical high-molecular materials. The organic-inorganic nano composite resin is characterized in that polyfunctional reactive nano monomer, i.e. polyhedral oligosilsesquioxane (POSS) is added on the basis of organic matrixes and inorganic fillers. The preparation method comprises the steps of adding the POSS into the resin matrixes, placing in a constant-temperature oven, fully dissolving the POSS in the resin matrixes and even agitating; adding an initiator system and evenly agitating; adding the inorganic fillers which are subject to surface silanization treatment, fully and evenly agitating in a vacuum agitator and removing air bubbles to obtain nano composite resin paste. By adding the POSS into dental composite resin, polymerization shrinkage can be obviously reduced, the mechanical property of the composite resin is comprehensively improved, the micro-leakage performance and the biocompatibility are good and the application prospect in the field of oral rehabilitation is wide. Besides, the preparation process is simple, the cost is lower and the popularization value and the application value are great.

The invention discloses a bone screw of a three-dimensional through porous structure. The porous bone screw comprises a screw head, a screw body and a screw cap. The screw body comprises a porous network composed of the three-dimensional through porous structure. The porous bone screw is made of medical materials which can be implanted into a human body, the three-dimensional through porous structure of the porous bone screw provides more space for the growth of bone cells, the combination between the implanted screw and the bone tissues of the human body is promoted, and the anchoring can be firm.

A method (and system) of reducing contact resistance on a silicon-on-insulator device, including controlling a silicide depth in a source-drain region of the device.

The present invention relates to an improved process for the production of oryzanol enriched fraction from rice bran oil soapstock; the present invention particularly relates to saponification, dehydration and leaching of rice bran oil soapstock for production of oryzanol enriched fraction.

A method for preparing a lithium-sulfur battery by taking a graphitized carbon nanotube flexible film as a current collector of the lithium-sulfur battery comprises the following steps of (1) taking sulfur as an active material, adding a conductive agent and a binding agent, taking N-methylpyrrolidone or deionized water as a solvent, and mixing paste; (2) coating the active material subjected to paste mixing already on the graphitized carbon nanotube flexible film, performing drying after coating, cutting the graphitized carbon nanotube flexible film to a product with the same size as a negative pole plate, and performing vacuum drying to obtain a positive pole plate; and (3) taking a lithium sheet as the negative pole plate, adding an electrolyte in a vacuum glove box, and assembling the battery according to a sequence of a negative electrode shell, the negative pole plate, a separator, the positive pole plate, foamed nickel and a positive electrode shell. The nanotube flexible film has a large amount of micropores with different sizes, the sulfur are very favorably deposited and absorbed into the micropores, thus, sulfur loading quantity in the positive pole plate and electrochemical reaction interface area are effectively increased, electron and ion conduction are enhanced, and the charge/discharge performance of the lithium-sulfur battery can be substantially improved.

The invention relates to a steel-based carbon fibre composite material and a preparation method thereof. The steel-based carbon fibre composite material comprises a plurality of bent carbon fibres which intertwine one another, a steel-based material and an adhesive which is adhered to the surface of the carbon fibres, wherein the carbon fibres, the adhesive and the steel-based material are formed by connecting through chemical bonds; a coral-like interface is formed between the adhesive which is adhered to the surfaces of the carbon fibres and the steel-based material through the chemical bonds; the preparation method for the steel-based carbon fibre composite material comprises the following steps: infiltrating the carbon fibres by utilizing the liquid adhesive; intertwining the carbon fibres after excessive adhesive is extruded away so that three-dimensional structural sponge-shaped carbon fibres which are adhered with the adhesive are formed; compounding the carbon fibres with the steel-base material after vacuumizing treatment is performed; finally, placing the composite material into a mould, pressurizing, cooling and moulding to obtain the steel-based carbon fibre composite material which is connected through the chemical bonds. The composite material prepared by the preparation method is far beyond the upper modulus limit of various types of conventional steel substrate materials; the rigidity, the tensile strength, the breaking power and the shearing strength are greatly improved.

This invention relates to novel designs of high power batteries, electrochemical cells, energy storage materials and electrode materials, and processes for manufacturing same. A battery comprising: (a) an alternating stack of one or more anodes and one or more cathodes; (b) one or more non-conducting separators separating the one or more anodes and cathodes; (c) an electrolyte; (d) a current collector extending through the stack; and (e) a casing holding the one or more anodes, the one or more cathodes, the one or more non-conducting separators, the electrolyte and the current collector

A membrane electrode assembly for a solid electrolyte fuel cell comprises: an electrode having a layer of nano-structured material on one of its faces, an electrocatalyst deposited on the nano-structured material and an electrolyte deposited on the electrocatalyst/nano-structured material. The nano-structured material can comprise carbon, silicon, graphite, boron, titanium and be in the form of multi-walled nano-tubes (MWNTs), single-walled nano-tubes (SWNTs), nano-fibers, nano-rods or a combination thereof. The nano-structured material can be grown or deposited on one face of an electrode of the cell or on a substrate such as a flexible sheet material of carbon fibers using chemical vapor deposition. The electrocatalyst and electrolyte can be incorporated in the nano structured material using physical vapor deposition (PVD), ion beam sputtering or molecular beam epitaxy (MBE).

The present invention discloses the use of a metal nanoparticle which comprises at least one semiconductor attached to it, wherein the at least one semiconductor is an atomic quantum cluster (AQC) consisting of between 2 and 55 zero-valent transition metal atoms, as photocatalysts in photocatalytic processes and applications thereof.