377results about How to "Uniform heat conduction" patented technology

The inventive apparutus and method for growing diamond monocrystal at high-speed belongas to the technical field of diamond materials. The said apparatus is provided with sample tray 5 on the substrate holder in the settling chamber of chemical vaporous depositon system; sample tray 5 being provided with close annular frame 2 on the multi-crystal diamond film. It can also be provided with diamond powder 3 in the cavern in the close annular frame 2. The inventive method is that, monocrystal diamond crystallon 4 is placed into the settling chamber through the cavern in the close annular frame 2 and is etched in advance by plasma in situ; then diamond monocrystal is grown in the atmosphere of methane, hydrogen and nitrogen. The method includes that possible non-diamond phase and structural cavern are determined to be treated by observing brightness variation of growth face. The inventive apparatus is simple and easy to machine; and it does not bring any pollution for growing monocrystal diamond and has good thermal conduction. Transparent diamond monocrystal can be produced by the inventive method, and the growing speed can be more than 100 mm/hour.

The invention relates to masonry mortar special for self-insulation walls, which is a powdery mixture and consists of the components with the following weight portions of 52-68 portions of cementing materials, 20-36 portions of gradation aggregates, 12-25 portions of vitrified hollow micro-pearl, 0.2-0.26 portions of redispersibility emulsion, 3-12 portions of thickener rheology agent, 0.05-0.3 portions of water retaining agent, 0.05-0.3 portions of anti-fissure strengthening agent and 0.012-0.035 portions of anti-entraining agent. The invention has the advantages of good water retention, lowheat conductivity, high mechanical strength, good flexible crack resistance, good waterproof performance, good dry shrinkage resistance, good fireproof performance, easy construction, high performance-price ratio, energy saving performance, etc.

The invention relates to a silica gel based carbon material oriented heat conduction interface material. The material comprises components in percentage by weight as follows: 9.5%-20% of siloxane-based resin with the viscosity being 200 cp-2,000 cp, 19.5%-35% of heat conductive filler, 35%-70% of an anisotropic carbon material and 1%-10% of an auxiliary agent and is prepared with a stirring and curing production method. The silica gel based carbon material oriented heat conduction interface material has the advantages as follows: according to the heat conductive interface material prepared by mixing the siloxane-based resin with the viscosity being 200 cp-2,000 cp, the heat conductive filler, the anisotropic carbon material and the auxiliary agent, the anisotropic carbon material mixed in gel is orientated through electric fields on upper and lower surfaces, longitudinal orientation of the carbon material is realized, the conduction path of the heat conductive material is in the direction where the large heat conduction coefficient is large, and the heat conduction performance is realized to the maximum; with the addition of the heat conductive filler, the defect that the heat conduction performance of the carbon material in direction, perpendicular to the orientation direction, of the carbon material, namely, in the horizontal direction of mixed gel, is poor after the anisotropic carbon material is orientated is overcome, balanced conduction of heat is guaranteed, and a production method is simple.

The invention discloses a thermal interface material and a semiconductor packaging structure. The semiconductor packaging structure comprises a substrate, a chip and a heat dissipation plate. The chip is arranged on the substrate, and the heat dissipation plate is arranged on the chip. The thermal interface material is contained between the chip and the heat dissipation plate; the thermal interface material comprises a grapheme layer and two low-melting-point metal layers; the two low-melting-point metal layers are covered on the grapheme layer from top to bottom. According to the thermal interface material and the semiconductor packaging structure, the flat heat-transfer efficiency between the chip and the heat dissipation plate can be improved through the grapheme material with high thermal conductivity; and the cost is lower than that of the thermal interface material using pure indium.

The invention discloses a thermo-curable 3D printing photosensitive resin and a preparation method and an application thereof. The photosensitive resin includes, by weight, 50-70 parts of a prepolymer, 30-50 parts of a diluent, 1-5 parts of a photo-initiator and 0.5-5 parts of a thermal-initiator, wherein the decomposition temperature of the thermal-initiator is higher than or equal to 100 DEG C when the half-life period thereof is 1 h. After photo-curing 3D printing shaping, the 3D printing photosensitive resin can be subjected to curing by heating as a post-curing method with a stable constant temperature heating device, such as a drying box and the like, so that the 3D printing photosensitive resin develops application in a non-transparent sample, a sample having complex shape, an ultra-thick sample, a colored sample and the like, and enables the samples to have better mechanical performances.

The present invention provides a preparation method of thermal interface material. Said method includes the following steps: providing a carbon nano tube array, using phase change material to fill the gap of the described carbon nano tube array so as to form composite phase change material; along the direction crossed with the described carbon nano tube array cutting the described phase change material into slab with predefined thickness; heating the described composite phase change material slab to the temperature above the phase change temperature of said phase change material, making two ends of the described carbon nano tube array be exposed from said phase change material, then cooling the described composite phase change material slab so as to form thermal interface material.

This invention provides an expanded-graphite sheet whose thermal conductivity in their surfacewise directions is relatively uniform and higher than its thermal conductivity in perpendicular direction and which can be produced efficiently at relatively low cost. Because the expanded-graphite sheet is made of expanded graphite alone and has the thermal conductivities in parallel direction of 350 W/(m·K) or more, its thermal conductivities in parallel direction is much higher than its thermal conductivity in perpendicular direction; therefore, it is suitable for the conduction and diffusion of heat. Besides, the expanded-graphite sheet can be produced easily, in a short time, efficiently, at relatively low cost.

The invention discloses a semiconductor packaging structure which comprises a substrate, at least one chip, a packaging colloid and a grapheme layer. The grapheme layer is arranged on the packaging colloid or arranged on the surface e of the chip. By means of the grapheme layer, the semiconductor packaging structure has high planarity heat-conductivity coefficient, facilities lateral heat conductivity, increases even conduction of heat and heat exchange area, and further improves the heat conducting-out efficiency of the chip.

The invention provides a graphene spontaneous heating floor, a manufacturing method and a low-voltage spontaneous heating floor system. The graphene spontaneous heating floor sequentially comprises anabrasion resisting layer, a surface decoration layer, an upper insulation inflaming retarding and temperature resisting waterproof layer, an upper base material floor layer, a lower base material floor layer, a lower insulation inflaming retarding and temperature resisting waterproof layer and a heat insulation layer from top to bottom. The upper surface of the lower base material floor layer isprovided with at least one groove. The grooves are internally paved with graphene heating elements and conducting circuits. The two ends of each conducting circuit are connected with connector clips.The connector clips of each conducting circuit are both connected with an independent control unit. The upper surface of the upper base material floor layer is provided with a plurality of blind holes, and magnet columns are embedded into the blind holes. The graphene spontaneous heating floor has the beneficial effects that a graphene material is adopted for conducting heat, the temperature is raised quickly, and heat conduction is uniform; and each floor is an intelligently-integrated independent unit, zone control of the indoor temperature is achieved, the energy consumption is reduced, andthe service life of the floor is prolonged; and graphene releases far infrared rays, by cooperating with the magnet therapy characteristics of magnets, the graphene spontaneous heating floor strengthens the physical body, protects health and is beneficial to family health.

An improved structure of a uniform thermal conductive heat dissipation device, having a thermal conductor and a plurality of heat pipes. The thermal conductor includes a convex body member, on which a plurality of parallel connecting parts is formed to allow the heat pipes embedded therein. Each of the heat pipes has a wick structure and a working fluid therein. Each heat pipe has a heat absorbing portion and a heat dissipation portion. The heat absorption portion is closely in contact with the thermal conductor. Thereby, each of the heat is subject to the same amount of heat to result in a uniform thermal conduction and dissipation effect.

The invention provides a method for manufacturing a graphite foil capable of heat conduction and electricity conduction. The method comprises the following steps: 1) spraying graphite powder onto a glue film with a basement membrane through a powder blower; and 2) rolling and flattening the graphite powder and the glue film to obtain a graphite belt capable of heat conduction and electricity conduction. In the method for manufacturing a graphite foil capable of heat conduction and electricity conduction, the graphite powder is sprayed onto the glue film, and the rolling and flattening method is adopted to overcome the defect that a flexible graphite plate is easily fractured; heating, baking and other processes are not required in the manufacturing process, so the energy consumption is low, and the obtained finished product can be used in heat conduction of a curve surface, such as a pipeline surface, and the heat conductive coefficient reaches 400W/mK, and is higher than the heat conductive coefficient of an aluminum foil; and the graphite material is difficult to oxidize, so the finished product is more durable, and is suitable in the fields of surface heat conduction and heating films.

The present invention relates to a three-dimensional porous tissue engineering carrier material, its preparation and application. Said three-dimensional porous tissue engineering carrier material includes three-dimensional porous structure, its internal porous structure is uniform, three-dimensional through degree is above 90%, pore size is 50-500 micrometer and porosity is 65-90%. Its preparation method includes the following steps: using polyhydroxybutyrate valerate (PHBV) and polycaprolactone (PCL) as raw material, mixing them, melting and spinning to obtain fibre whose diameter is 10-500 micrometer, cutting said fibre to make said fibres have identical length, making said fibres be uniformly arranged and filled into a mould, sealing said mould for 5min-1n at 50-80deg.C, demoulding, sterilizing and packaging so as to obtain the invented product. Said product can be used for repairing or reconstructing some tissue organs.

The invention belongs to the technical field of kitchenware, and relates to a composite bottom aluminum pot and a production process thereof. The pot bottom of the composite bottom aluminum pot has a structure that the bottom external surface of the pot bottom is downwards provided with a combination layer, an aluminum sheet and a composite metal bottom sheet in turn. The production process comprises the following steps: surface-roughening and coating a composite metal sheet and a composite pot body or surface-roughening and coating a composite pot body to prepare the composite bottom aluminum pot. The composite bottom aluminum pot has the advantages of firm composite pot body bottom, little cooking fume, long service life, reasonable production process, excellent performance of the product, suitability for popularization and application on composite pots of the same type.

The invention discloses a microlens array based large-power ceiling lamp. The microlens array based large-power ceiling lamp comprises a housing, a light source module, a driving power supply and a radiating system; the housing comprises a base plate and a lampshade; the light source module comprises a microlens array, an LED array light source and a bottom plate; the radiating system comprises a heat transfer adhesive and a ceramic radiating sheet; the lampshade is positioned on the top of the lamp and is closely combined with the base plate through a clamp; the LED array light source and the driving power supply are both positioned on the bottom plate and are combined with the bottom plate through fixing parts; the driving power supply is positioned in the center of a ring belt which is composed of the bottom plate; the microlens array cover the LED array light source, and each microlens is corresponding to single LED lamp bead; the radiating system is positioned on the rear surface of the bottom plate; the ceramic radiating sheet is in filling connection with the bottom plate through the heat transfer adhesive, wherein the bottom plate is combined with the base plate through the fixing part. According to the microlens array based large-power ceiling lamp, the secondary optical design is performed, thus the light collecting efficiency is improved, the light diffusion angle is expanded, the radiating effect is obvious, and the appearance is nice.

The invention provides an air purification sheet and an air purification module. The air purification sheet comprises a base material sheet, a purification coating and a heating assembly, wherein thepurification coating is arranged on the outer surface of the base material sheet; the base material sheet comprises a first supporting sheet and a supporting sheet; the heating assembly is arranged between the first supporting sheet and the second supporting sheet. Thus, the air purification sheet is simple in structure, convenient to manufacture and low in wind drag. The heating assembly is arranged in the air purification sheet and can make the purification coating rapidly regenerate in situ. The service life of a purifying material is prolonged. The air purification sheet can be used for effectively purifying indoor gaseous pollutants for a long term.

The invention discloses an easy-to-repair high-thermal-conducting gel and a preparation method thereof. The easy-to-repair thermal-conducting gel is based on vinyl silicone oil and vinyl MQ resin; a thermal-conducting agent is added, the heat-conducting gel is enabled to have good heat conductivity and certain fluidity as the existing thermal-conducting gel and can be used for filling gaps and irregular parts between electronic components and radiators and has excellent processability and is very suitable for automatic production operation. White carbon black and a release agent are also addedinto the thermal-conducting gel accordingly, the thermal-conducting gel can be cured into a block similar to the thermal-conducting gasket after being heated and has integrity and can be integrally stripped from the PCB and avoids the situation that the thermal-conducting gel remains on the PCB and is difficult to remove and even pollutes other components during repair and improves the repairability of the thermal-conducting gel.

The invention relates to a preparation method of a graphite film, in particular to a preparation method of a high-heat conductivity flexible graphite film, and mainly solves the technical problems that in the prior art, harmful gas and raw materials in graphite cannot be efficiently separated, and the consistency of the thickness index, the density index and the strength index of the flexible graphite film cannot be guaranteed. The preparation method comprises the following steps: performing high-temperature bulking on high-quality natural high-purity large-particle flake graphite with a complete lattice structure and the carbon content greater than 99%, performing steam discharge desulfurization on vermicular graphite, and performing dual-cyclone discharging on the vermicular graphite after the steam discharge desulfurization at a discharging port of a bulking furnace, so that the vermicular graphite is flatly piled and densely distributed on a press roll table; calendaring the vermicular graphite through the press roll table, and rolling to obtain the final high-heat conductivity flexible graphite film.

The invention discloses a graphene heating carpet comprises a carpet bottom layer, a first insulating layer, a heating layer, a second insulating layer and a carpet surface layer which are sequentially connected from bottom to top; the heating layer comprises a graphene heating slurry, a metal current carrying strip and a heating wire, wherein the two ends of the graphene heating slurry are respectively connected with two metal carrier flow strips, the electric heating wires are uniformly arranged in the graphene heating slurry, and the two ends of the electric heating wires are perpendicularly connected to the two metal carrying strips, which are connected with the temperature sensor, the temperature controller and the plug through a electrical conductor; the temperature sensor is positioned between the second insulating layer and the carpet surface layer; the temperature controller is characterized with heat preservation, heating and timing. As the graphene is adopted for heating, the conversion rate of the heat energy is almost up to 100 percent, thereby the effect of high efficiency and energy conservation is accomplished; meanwhile, the graphene releases far infrared rays withthe wavelength of 8-14 microns, therefore the graphene can be used for resisting bacteria and inhibiting bacteria.