155results about How to "Good thermal conductivity" patented technology

The invention discloses a high heat-conducting thin graphene-based composite material, as well as a preparation method and an application thereof. The composite material comprises a base body component and a packing component, wherein the base body component and the packing component respectively include thin graphene, polymer and/or polymer monomer and a high heat-conducting material; the preparation method comprises a step of compounding the base body component with the packing component; the compounding method comprises fusing, ball-milling, solution blending, electrostatic spinning, solution spinning, melt-spinning, extruding by double screws, mixing by an open mill or powder metallurgy. The polymer, the thin graphene, the traditional high heat-conducting material and the like are compounded by a simple process, so as to form the product with excellent heat conducting property, and good mechanical and electrical properties. Therefore, the process is easy to perform and control, and cost is low; and the obtained product has a wide application prospect in the aspects such as efficient heat conduction and radiation.

The invention discloses a conductive adhesive for LED (light emitting diode) packaging. The conductive adhesive consists of the following raw materials in percentage by weight: 75 to 95 percent of conductive powder, 2 to 12 percent of epoxy resin, 1 to 10 percent of epoxy diluting agent, 1 to 3 percent of curing agent, 0 to 1 percent of curing accelerator, and 0.5 to 2 percent of coupling agent. The LED conductive adhesive provided by the invention has superior performance and good heat conduction and electric conduction effects and can fully meet operating requirements of a high-brightness high-power LED chip.

The invention relates to a foam metal composite phase change material heat storage temperature-difference power generation device. The device comprises a plurality of small separated sealed containers arranged on the outer wall of a high-temperature flue gas pipeline in a sleeved mode. The small separated sealed containers are filled with foam metal composite phase change materials. The outer sides of the small separated sealed containers are closely connected with the hot end of a temperature-difference thermoelectric power generation module through a thermally-conductive adhesive. The shape of the inner sides of the small separated sealed containers is the same as the shape of the outer wall of the high-temperature flue gas pipeline, and the inner sides of the small separated sealed containers make close contact with the outer wall of the high-temperature flue gas pipeline; the outer sides of the small separated sealed containers are planes connected with the hot end of the temperature-difference thermoelectric power generation module, and the cold end of the temperature-difference thermoelectric power generation module is connected with a radiating block. The radiating block is filled with circulating cooling water, and the outer side of the radiating block is connected with radiating fins. According to the device, the foam metal composite phase change heat storage materials are combined with temperature-difference thermoelectric power generation devices to generate power, and therefore the efficiency of temperature-difference thermoelectric power generation can be effectively improved. The device can be conveniently installed on a boiler pipeline or an automobile exhaust pipeline and is reliable in power generation performance.

The invention relates to the technical field of a polyurethane pouring sealant, and particularly relates to a halogen-free flame retardant heat conduction polyurethane pouring sealant. The halogen-free flame retardant heat conduction polyurethane pouring sealant is formed by uniformly mixing 100 parts by mass of component A and 15-25 parts by mass of component B, wherein the component A comprises 30-45 parts by mass of polymer polyhydric alcohol, 15-25 parts by mass of halogen-free flame retardant, 40-55 parts by mass of heat conducting filler, 0.1-2 parts by mass of defoaming agent and 0.1-2 parts by mass of catalyst, the component B is isocyanate, and the polymer polyhydric alcohol is one of or a mixture of castor oil and polyether polyol. The halogen-free flame retardant heat conduction polyurethane pouring sealant does not contain halogen and has high conductivity of heat, high flame resistance and strong mechanical property. Meanwhile, the invention also discloses a preparation method of the halogen-free flame retardant heat conduction polyurethane pouring sealant. The preparation method is simple in process and has strong operability.

The invention relates to a shape-stabilized phase change energy storage material for building and a preparation method thereof. The material provided by the invention comprises components of: by weight, 70-85% of a composite phase change energy storage material with its melting point being 18-30 DEG C and 15-30% of gesso. The composite phase change energy storage material with its melting point being 18-30 DEG C is composed of a porous matrix and a mixed fatty acid phase change material, wherein the mass ratio of the porous matrix to the mixed fatty acid phase change material is 1:4-1:6. At the temperature of 60-80 DEG C, the porous matrix is added in the molten lauric acid-capric acid mixed fatty acid to prepare a composite phase change material. Then, gesso is mixed with the composite phase change material to prepare a shape-stabilized fatty acid phase change energy storage material with a more stable adsorption property. The prepared shape-stabilized phase change energy storage material has good thermal conductivity, good adsorption stability and good material plasticity, will not cause seepage at high temperature, is easy to mix with a building material, and has a good application prospect.

The invention discloses a high-thermal-conductivity PP-based composite material, which comprises 60% to 80% of PP, 1% to 20% of surface-modified efficient thermal conduction agents, 1% to 5% of compatilizers, 0.5% to 1% of antioxidants and 0.5% to 1% of coupling agents in percentage by weight. The preparation method of the high-thermal-conductivity PP-based composite material comprises steps of mixing materials uniformly, then placing the mixed materials in an extruder, fusing and extruding, and granulating the extruded materials. According to the high-thermal-conductivity PP-based composite material and the preparation method thereof, a product has good thermal conductivity and can be applied to cooling components of lighting and communication systems.

The invention discloses a self-supporting nickel phosphide catalyst and a preparation method and application thereof. The self-supporting nickel phosphide catalyst is a nickel phosphide catalyst obtained by in-situ growing of a nickel oxalate or nickel hydroxide crystal layer on a framework matrix through a hydrothermal method and performing phosphating while secondary forming is not needed, and the nickel phosphide catalyst is composed of the framework matrix and a nickel-phosphorus compound, wherein the nickel-phosphorus compound is at least one of Ni3P, Ni12P5, Ni2P and Ni5P4, total mass ratio of the nickel-phosphorus compound is 0.1-50%, and the balance is the framework matrix. Experiments show that the self-supporting nickel phosphide catalyst is high in stability and thermal conductivity, easy to form and fill, high in flux and low in pressure drop, especially has the advantages of high low-temperature activity, high dimethyl oxalate conversion rate and high methyl glycolate selectivity and can be used as a reaction catalyst for hydrogenating dimethyl oxalate to prepare methyl glycolate.

The invention discloses eutectic soldering equipment of an LED wafer. The eutectic soldering equipment comprises a heating device, a drive control system, a power configuration box body, a soldering working table, an eutectic soldering platform arranged in the middle of the front part of the soldering working table, a bracket supplying device and a wafer supplying device which are arranged in a manner of surrounding both sides and the rear part of the eutectic soldering platform respectively, a scaling powder supplying device arranged above the eutectic soldering platform, a nitrogen cooling device arranged on the eutectic soldering platform, a pulse current heating device arranged on one side of the eutectic soldering platform and a constant-temperature current heating device arranged inside the eutectic soldering platform. The eutectic soldering equipment has a high heating speed and high soldering precision, and enables the LED wafer after being soldered to have a better heat transfer effect.

The invention belongs to the technical field of high molecular materials, and discloses an electric-insulating heat-conducting polyphenyl thioether composite material and a preparation method thereof. The composite material disclosed by the invention comprises the following components in parts by weight: 20-40 parts of polyphenyl thioether, 40-60 parts of heat-conducting filler, 5-10 parts of toughener, 5-10 parts of glass fiber, 0.5-4 parts of coupling agent, 0.3-1 part of antioxidant and 0.5-2 parts of processing assistant. The preparation method of the composite material comprises the following steps: adding 40-60 parts of heat-conducting filler and 0.5-4 parts of coupling agent into a high-speed mixer, and mixing at 80-120 DEG C for 10-45 minutes; adding the mixture and 20-40 parts of polyphenyl thioether into the high-speed mixer, adding 5-15 parts of toughener, 0.3-1 part of antioxidant and 0.5-2 parts of processing assistant, and evenly mixing; adding the mixture into an extruding machine through a feed hopper, and adding 5-15 parts of glass fiber through a glass fiber port; and carrying out melt extrusion and granulating. The polyphenyl thioether composite material disclosed by the invention has excellent heat-conducting property, and remains favorable mechanical properties and processability.

The invention discloses a TiN enhanced ferrous matrix composite surface layer and a processing method thereof. The processing method is characterized by precoating a layer of pure titanium powder on the surface of a steel matrix, adopting nitrogen arc for direct heating after drying to locally smelt the pure titanium powder and the surface of the steel matrix, Ti in a weld pool and N from the arc atmosphere undergoing nitridation reaction (Ti+N->TiN) and the in-situ TiN serving as an enhanced phase to form the ferrous matrix composite with the steel matrix. By adopting the treatment methods of titanium powder precoating and nitrogen arc cladding, the TiN enhanced ferrous matrix composite surface layer with thickness of 1-2mm is prepared on the surface of the steel matrix. The TiN enhanced phase grows in situ, is metallurgically bonded with the steel matrix, dendritical and granular and uniformly distributed in the steel matrix and can obviously improve the surface hardness and the wear resistance of the steel matrix.

The invention relates to a densification process for preparing a high-volume-fraction SiCp/Al composite material. The process comprises the following steps: SiC powder and aluminum powder are added into a ball mill to be mixed according to a volume ratio of 50-80% to 20-50%, preferentially a volume ratio of 50-60% to 40-50%, the mixed powder subjected to ball milling and mixing is put into a mold to be subjected to cold press molding, a cold pressed blank is put into a vacuum hot press for hot-pressing sintering, the pressure is applied in the heating process of the hot-pressing sintering, the temperature is increased to 560-635 DEG C, and at the same time, the pressure is kept under the hot-pressure of 28-65 MPa, the percentage is calculated according to a benchmark of the total volume of the SiC powder and the aluminum powder.

The invention belongs to the technical field of composite materials and discloses a composite phase change material with high thermal conductivity and a preparation method thereof. The composite phase change material comprises a surface modified carbon-based nanometer thermal conductive filler and aliphatic acid. The surface modified carbon-based nanometer thermal conductive filler is one of surface modified nano-graphite flake, graphene or carbon nanotube. The aliphatic acid is one component selected from decylic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, stearic acid and arachidic acid or a mixture of two components selected from decylic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, stearic acid and arachidic acid. The preparation method comprises the following steps: carrying out surface modification on a carbon-based nanometer thermal conductive filler by the use of melamine, sodium humate or dopamine and adding the surface modified carbon-based nanometer thermal conductive filler into a aliphatic acid melt; and uniformly mixing for melt blending and introducing the melt blending product into a mold, and carrying out curing molding so as to obtain the composite phase change material with high thermal conductivity. The composite phase change material with high thermal conductivity has excellent thermal conductivity and stable performance, and has a good application prospect.

The invention discloses an insulated polyphenylene sulfide high thermal conductive plastic which is prepared from the following raw materials in percentage by mass: 30-45 parts of polyphenylene sulfide, 41-61 parts of thermal conductive agent, 3-4 parts of self-made modifying agent, 1.5-3 parts of solubilizer, 1-3 parts of lubricating agent, 1-2 parts of coupling agent, 1-1.4 parts of antioxidant and 0.5-1 part of light stabilizer. The raw materials are prepared into the insulated polyphenylene sulfide high thermal conductive plastic through the steps of pre-treating, stirring, granulating, drying and the like. The thermal conductive plastic prepared by using the method has higher thermal conductivity.

The invention relates to the technical field of functional elastomer materials, and provides a preparation method and a product of a heat-conductive thermoplastic vulcanized rubber elastomer material,the preparation method comprises: (1) using a coupling agent for surface modification and drying of a heat conductive filler; (2) mixing the modified heat conductive filler with matrix resin for meltblending, extruding, granulating and drying to obtain a heat-conductive resin pellet; (3) mixing the heat-conductive resin pellet with rubber and a vulcanization system to carry out dynamic vulcanization reaction, and squeezing and granulating to obtain the heat-conductive thermoplastic vulcanized rubber elastomer material. The heat-conductive thermoplastic vulcanized rubber elastomer material prepared by the method has the advantages of a small amount of the heat conductive filler, excellent thermal conductivity, excellent processing and forming property, simple production process, high production efficiency and recyclability, and the like and can be widely applied in electronic electrician, automotive and many other fields, so that the heat-conductive thermoplastic vulcanized rubber elastomer material has broad market application prospects.

The invention discloses a phase change heat storage device. The phase change heat storage device comprises a heat accumulator shell, heat exchange pipelines and phase change materials, wherein the heat exchange pipelines and the phase change materials are arranged in the heat accumulator shell. The phase change heat storage device is characterized in that a porous metal framework is arranged in the heat accumulator shell, porous channel arrays are arranged on the porous metal framework in parallel in the axial direction, and the phase change materials are located in all porous channels of the porous channel arrays; the heat exchange pipelines are arranged in the porous channel arrays in the axial direction of the porous metal framework at intervals; each heat exchange pipeline is surrounded by at least one circle of pore channels; a flow dividing device is arranged at inlets of the heat exchange pipelines, and a flow collecting device is arranged at outlets of the heat exchange pipelines; three-dimensional crossed flow guide type chaos turbulators are further arranged in the heat exchange pipelines. According to the phase change heat storage device, due to the fact that the three-dimensional crossed flow guide type chaos turbulators are arranged in the heat exchange pipelines, flow guide blocks which are arrayed periodically and alternately can induce fluid to generate chaos convection, heat exchange between the fluid and pipe walls can be enhanced obviously, and the heat storage device can achieve excellent heat storage and heat exchange capability.

Disclosed is a heat sink for an electronic device, produced by joining a Cr-Cu alloy sheet comprising a Cu matrix and more than 30 mass% and not more than 80 mass% of Cr to a Cu sheet, and rolling the joined product, thereby producing a laminate having a Cr-Cu alloy layer and a Cu layer. The heat sink for an electronic device has low heat expansion properties, excellent heat conductivity particularly in the direction of thickness, and a reduced entire thickness.

The invention discloses a high thermal conductivity polyolefin resin-based composite material and a preparation method thereof. According to a set ratio, the mass components are divided into matrix material 100, thermal conductivity system filler 8-45 and antioxidant 0.5-2.6 and uniformly mixed Finally, it is added to a twin-screw extruder for melt extrusion and granulation to finally obtain a high thermal conductivity polyolefin resin-based composite material. The high thermal conductivity polyolefin resin-based composite material prepared by the above method has high thermal conductivity and good processing flow. It can be used in extrusion, injection and other molding processes. The products can meet the requirements of different fields for polymer materials such as heat conduction, static conduction, and good processing performance. The application prospect is good, and it has broad industrialization and market prospects.

The invention relates to a metal-base copper clad laminate manufactured through high-performance RCC (resin coated copper foil) and applied to a high-power LED. The metal-base copper clad laminate comprises epoxy resin composition, wherein solid components of the epoxy resin composition comprise, in parts by mass, as follows: (A) 5-35 parts of bisphenol A type epoxy resin, 0-10 parts of phenoxy resin and 5-30 parts of dicyclopentadiene phenol epoxy resin; (B) 5-35 parts of nitrile rubber; (C) 50-80 parts of filler; (D) 1-10 parts of an amine curing agent; (E) 0.1-2 parts of an accelerant. The metal-base copper clad laminate has good flame retardancy, heat conduction, impact resistance and environmental protection property.

The invention relates to a processing method of a high-heat-conduction aluminum base copper clad board. The method comprises the following steps: 1, anodizing an aluminum board; 2, carrying out rolling compounding of a high-heat-conduction glue film and the anodized aluminum board obtained in step 1 through using a roller pressing machine; 3, carrying out rolling compounding of a copper foil and the baked aluminum board pressed with the high-heat-conducting glue film by using the roller pressing machine; and 4, compounding a protection film with the lateral surface of the aluminum base board of a well compounded aluminum base copper clad board through using a protection film compounding machine to obtain the high-heat-conduction aluminum base copper clad board. Circuit boards produced through using the method have a high heat conduction performance, and the aluminum base board has a high compounding strength with the copper foil, so the production operation is convenient.

A stick free frying pan with a highly antifriction highly thermo efficiency and manufacturing technique thereof is disclosed, which belongs to the household cooking utensil field. It comprises a pot body and a stick free layer installed inside the inner surface of the pot body. It is characterized in that the pot are designed to be a bi-part type structure of the pot wall(1) and pot bottom(3), and being rivet welded, melt welded and braze welded into a hybrid type pot body through dead joint member. Conduct supersonic speed electric arc spay coating uneven fine micro particle layer after the surface coarsening of the pot body and before the spray coating of the stick free layer. Compared with the prior arts, it has advantages of high efficiency, firm combination between the pot bottom and pot wall, high antifriction and long service life of the anti stick life and can fry the dish directly by stainless metal turner.

The invention discloses a high-dispersion graphene heat conduction plastic production method, a product thereof, and an application of the product. The production method comprises the following steps: impregnating graphene in a water and ethanol mixed solution containing a surfactant, carrying out ultrasonic and stirring treatment for 1-5 h, and drying the obtained solution in a 100 DEG C oven for 4-10 h; respectively weighing and mixing an antioxidant and a heat conduction powder assistant according to a certain mass ratio to form uniform powder; uniformly mixing the uniform powder, a graphene slurry, a coupling agent and matrix resin; and adding the above obtained raw materials into a double screw extruder from a main feeding opening, carrying out blending extrusion processing, pelletizing the processed raw materials, and carrying out low temperature drying to obtain the final product high-dispersion graphene heat conduction plastic. The dispersion state of the graphene in the plastic is improved, so the plastic has a high mechanical strength and a good heat conduction performance. The graphene heat conduction plastic disclosed in the invention has the advantages of strong versatility, good processability and realization of continuous large-scale production.

The invention discloses a high-power LED lamp based on a heat pipe for thermal conductivity and relates to an LED lamp. The prior high-power LED lamp has unsatisfactory heat transference and poor heat dissipation effect. The high-power LED lamp comprises an LED chip, a chip base, a heat dissipation device which is connected with the chip base and a light distribution device which is arranged on the chip base. The high-power LED lamp is characterized in that the heat dissipation device comprises a heat radiator and a plurality of heat pipes which connect the heat radiator with the chip base; and a plurality of inner grooves which are matched with the heat pipes are correspondingly formed on the chip base for containing the heat pipes, and a metal welding layer is arranged between the inner grooves and the heat pipes for connecting the chip base which is covered by the chip with the heat radiation device so as to form an integrated light source. The technical method has good heat conduction effect, rapid heat dissipation and reliable connection.

The invention belongs to the technical field of a functional material, and relates to a novel heat dissipation insulating composite material and a preparation method therefor. Specifically, the novel heat dissipation insulating composite material consists of graphite, aluminum and ceramic, and adopts a sandwich structure, wherein a ceramic sheet layer is positioned in the middle, and graphite/aluminum composite sheet layers are positioned on the two sides; and the graphite/aluminum composite sheet layers consist of a graphite sheet layer with pores and aluminum for filling the pores. Integral forming of the graphite, metal aluminum and ceramic is realized by a high-pressure forging method to form the brand new composite material; the composite material has high thermal conduction, high insulativity and enhanced mechanical strength; and raw materials are low in coat, and the preparation method is simple and easy to implement, so that the composite material has high market competitiveness.

Disclosed is a heat conductive composite material sheet (100), which comprises a first aluminum alloy layer (110), at least one graphite sheet (120), an aluminum alloy frame (130) and a second aluminum alloy layer (140), wherein the aluminum alloy frame (130) is provided with at least one opening (131), the graphite sheet (120) is positioned in the opening (131) of the aluminum alloy frame (130), the aluminum alloy frame (130) and the graphite sheet (120) are clamped between the first aluminum alloy layer (110) and the second aluminum alloy layer (140), the first aluminum alloy layer (110) is diffusively bonded with the graphite sheet (120) and the aluminum alloy frame (130), the second aluminum alloy layer (140) is diffusively bonded with the graphite sheet (120) and the aluminum alloy frame (130), and the graphite sheet (120) is coated with the first aluminum alloy layer (110), the second aluminum alloy layer (140) and the aluminum alloy frame (130) as a whole. The present invention also provides a fabrication method of the heat conductive composite material sheet. The heat conductive composite material sheet provided by the present invention and the fabrication method thereof can connect high heat conductive aluminum alloy to graphite and have a low production cost.

The invention discloses a polyethylene glycol-porous expanded graphite material, the phase-transition temperature is 6.2DEG C to 14.7DEG C, the enthalpy of phase change is 74.9kJ/kg to 159.3kJ/kg, the coefficient of thermal conductivity is 7.7W/m.k to 13.7W/m.k, and the thermal diffusion coefficient is 2.03mm2/s to 4.26 mm2/s. The invention also discloses a preparation method of the polyethylene glycol-porous expanded graphite material. The polyethylene glycol-porous expanded graphite material disclosed by the invention has good heat-conducting property, is easily stored, uses PEG (polyethylene glyco) molecular weight less than 1000, and is quite suitable for the preservation, storage and transportation of fruits and vegetables.

The invention discloses a preparing method and application of amination graphene oxide modified solvent-free-type polyurethane resin. The method comprises the steps of 1, adopting diamine for modifying graphene oxide to obtain amination graphene oxide with amido groups and hydroxyl groups; 2, carrying out a reaction between diisocyanate and dihydric alcohol to prepare a polyurethane prepolymer with the mass fraction of isocyanate being 3-8%; 3, dispersing the amination graphene oxide in the diamine to cure the polyurethane prepolymer to obtain the modified solvent-free-type polyurethane resin.The prepared amination graphene oxide modified solvent-free-type polyurethane resin can be applied to automotive trim leather, and has high peeling strength and good heat conduction, electric conduction and static electricity resistance.

The invention provides a battery pack shell. The battery pack shell comprises a battery pack box and a battery pack bottom plate which is opposite to the battery pack box, wherein the battery pack box is made of a magnesium aluminum alloy composite material, the magnesium aluminum alloy composite material is covered by a carbon fiber reinforced unsaturation resin and a glass fiber composite, and the battery pack bottom plate is made of a carbon fiber reinforced titanium-coated magnalium alloy composite. By virtue of the carbon fiber reinforced unsaturation resin, the glass fiber composite and the carbon fiber reinforced titanium-coated magnalium alloy composite, the battery pack shell has enough strength, also has a relatively good heat-conducting property and ultrahigh corrosion resistance, so that the property of a battery pack is improved.

The invention provides a heat exchanger with an anticorrosion and scale-preventing coating and a manufacturing process thereof, and relates to a heat exchanger with a coating in the chemical engineering field. The anticorrosion and scale-preventing coating comprises an inner connection layer and an outer nano-titanium layer. Anionic surfactants and metal elements with high thermal conductivity are added into the connection layer and achieve the effects of transferring heat and preventing the outer layer from being disengaged. The nano-titanium layer is smooth in surface, water scale accumulation is not likely to happen, and the anticorrosion and scale-preventing functions are achieved. The heat transferring portions of various heat exchangers can be coated with the coating, the phenomenon that a heat exchange tube or a heat exchange plate is prone to corrosion and scale formation can be reduced, and the coating on the surface is not liable to being disengaged; meanwhile, heat exchange efficiency can be improved, and the service life of the heat exchanger is prolonged.

The invention discloses a terahertz emission source based on transition metal chalcogenide and an excitation method. The terahertz emission source comprises a transition metal chalcogenide film and pumping light source. The terahertz emission source has the advantages that fixed incoming excitation pulses are used, the planar central axis of the transition metal chalcogenide film is rotated, and pumping light source laser comes in at 0-90 degrees and excite the surface of the transition metal chalcogenide film to radiate terahertz waves; the transition metal chalcogenide film is used as the terahertz emission source, so that the generated terahertz emission source is high in radiation efficiency; in addition, due to the fact that the film is good in heat conductivity, stable in lattice structure and adjustable in energy band gap, device service life and wide application range are guaranteed, and a two-dimensional terahertz emission source type gap is filled up; by using the transitionmetal chalcogenide film as the terahertz emission source, elliptical polarization terahertz waves can be generated, and the elliptical polarization terahertz waves is significant in molecular chirality spectrum, substance circular dichroism spectrum, polarization imaging and the like.

The invention provides a graphene carbon nano tube composite film and a preparation method and application thereof. The preparation method comprises the following steps that S1, a substrate is provided, and the whole or at least one face of the substrate is made of a graphene catalyst; S2, electroplating is conducted, thus, a carbon nano tube is attached to the surface of the substrate, and the graphene catalyst is not fully covered with the carbon nano tube; and S3, graphene continues to grow on the face, containing the graphene catalyst, of the substrate through a chemical gas phase method,and the graphene carbon nano tube composite film is obtained. The graphene carbon nano tube composite film and the preparation method and application thereof have the characteristic of being simple intechnology, the graphene carbon nano tube composite film obtained through the non-transferring self growing technology is good in quality, and contact and attaching between the composite film and thecatalyzing substrate are good.