74results about How to "Excellent electric heating performance" patented technology

The invention discloses anti-icing coating for the surface of an ultra-high voltage transmission line. The anti-icing coating for the surface of the ultra-high voltage transmission line is prepared from the following raw materials in parts by weight: 45-60 parts of fluorosilicon resin, 5-10 parts of functional nano ions, 5-8 parts of TiO2, 8-12 parts of nano SiO2, 0.5-1 part of an emulsifying agent, 0.5-1 part of a defoaming agent, 0.3-1 part of a flatting agent, 1-2 parts of a silane coupling agent and 20-30 parts of a solvent. The prepared anti-icing coating for the surface of the ultra-high voltage transmission line has the advantages that a contact angle with water is 128-168 degrees; compared with the condition that no anti-icing coating is coated, vertical adhesive force between a coating coated with the anti-icing coating and ice is reduced by 76-91.5%; and the anti-icing coating for the surface of the ultra-high voltage transmission line has good electric heating effect, average temperature rise is 10.8-16.5 DEG C, and the anti-icing coating for the surface of the ultra-high voltage transmission line also has good acid resistance, alkali resistance and insulating properties.

A composite electric heating carbon membrane contains heat resisting substrate, electric carbon membrane ,oxidation resisting protective coating, conductive electrode, wherein the electric carbon membrane consisting of scale graphite, carbon fiber, steel fiber, zinc stearate, phenolic resin, pioloform and acetone, oxidation resisting protective coating consisting of boron carbide, silicon carbide, silica fume, mini-aluminium phosphate and water. The preparation method contains painting, hot pressing, oxygen isolation charring and solidifying after spraying. The surface heating temperature can be high than 2000 deg.C.

The invention relates to an optimizing process of wafer-level packaging. The optimizing process comprises the following steps of: forming a bonded metal convex block on a bonding pad of a chip, wherein the bonded metal convex block is higher than the surface of a passivation layer; forming a protective adhesive on the chip, wherein the protective adhesive is used for covering the passivation layer and the bonded metal convex block; grinding a protective adhesive layer for exposing the surface of the bonded metal convex block; and forming a solder bump on the exposed surface of the bonded metal convex block and refluxing. The process disclosed by the invention has the advantages of short flow process, easiness in management and control, low cost and high performances.

The invention discloses a carbon fiber floor heating device. The device comprises an insulation reflecting layer arranged on a floor surface slab, wherein the insulation reflecting layer consists of a floor heating reflecting film and an insulation layer; a carbon fiber floor heating film is arranged at the upper part of an insulation layer of the insulation reflecting layer; a temperature sensor probe is arranged in the middle of the upper part of the carbon fiber floor heating film and communicates with a temperature control instrument through a temperature sensor conductor; the carbon fiber floor heating film is provided with a copper coil tape; the conductor externally connected to the copper foil tape is connected with one output voltage end of a transformer; the input voltage at the other end of the transformer is connected with a temperature control instrument inserting hole; a temperature control instrument socket is arranged at an external power supply. According to the device adopting the structure above, a carbon fiber cloth strip can be applied to an indoor floor heating device; good heating effect can be achieved; the operation is convenient and quick; the green and cleanness are achieved; the features of high energy consumption and low efficiency of the traditional heating manner can be overcome; in addition, indoor temperature can be preset under the control of the temperature control instrument; therefore, a user can use comfortable, and meanwhile, the energy waste can be reduced, and as a result, the energy consumption is reduced.

The invention relates to an MXene-based water-based nano electric heating composite coating and a preparation method thereof, and the MXene-based water-based nano electric heating composite coating is prepared by the following steps: by using a water-dispersible MXene nanosheet as a conductive filler, respectively using water-based polyurethane, water-based polyacrylate or water-based epoxy resin and MXene to prepare water dispersion liquids with certain mass fractions, adding the MXene dispersion liquid into the water-based resin according to a preset mass ratio of the water-based resin to the MXene under the stirring action, and continuously conducting stirring to enable water-based resin macromolecules to be fully and uniformly adsorbed on MXene nanosheets, so as to obtain the water-based resin ester-MXene nano electric heating composite coating. The prepared coating can be constructed through spraying, dip-coating, roller coating or dispensing and other methods, has excellent electric heating performance and heating regulation performance, is high in adhesive force and good in flexibility, has the resistivity capable of being regulated as required, is low in required voltage and high in temperature rise rate, is not limited by the surface appearance of a base material in use, and is wide in application range.

The invention relates to a method for preparing functional carbon fiber composite electrothermal paper. The method comprises the following steps of: (1) preparing functional carbon fibers; (2) preparing papermaking slurry; (3) making paper; and (4) performing post-treatment. The functional carbon fibers are prepared by carrying a functional body on the surface of an activated carbon fiber; wet papermaking is executed, so that functionalization of the functional carbon fiber composite electrothermal paper is realized; compared with the conventional functionalization method for the carbon fiber composite electrothermal paper, the method has the advantages that the problems of large using amount of functional powder bodies and high waste during preparation are solved; during preparation, the problems of large using amount of wet papermaking technological auxiliaries and severe water pollution are solved; the method is environment-friendly and energy-saving; and the prepared functional carbon fiber composite electrothermal paper has the advantages of high functionalization efficiency, obvious effect, durability and stability.

The invention discloses a high-weldability environment-friendly superfine solder wire for intelligent manipulator welding and a preparation method thereof. The superfine solder wire comprises 96.9 wt%-98.1 wt% of solder alloy and 1.9 wt%-3.1 wt% of scaling powder, wherein the solder alloy comprises the components of tin, silver, copper, molybdenum, cerium, tellurium and lutetium, by adding the cerium, the structure of the solder can be changed, so that crystal grains are refined, solder joint bridges are reduced, the surface wettability of the solder alloy is changed, and the creep property and the tensile property are improved; the addition of tellurium can improve the corrosion resistance, the wear resistance and the strength of the material, the tensile strength of the solder can be improved, the generation of tin whiskers can be prevented; lutetium has good electrical conductivity and ductility and extremely high activity, and is excellent in effect of improving electric heating performance and oxidation resistance in soldering tin alloy powder, so that tensile strength and toughness of the solder are improved, the wettability of solder wires is good, the tensile strength is excellent, and lead-free and environment-friendly effects are achieved. The superfine solder wire has the advantages of being high in weldability and not prone to core breakage, and high weldability andlead-free environment-friendly development of products are achieved when the superfine solder wire is applied to the high-end application field of intelligent manipulator welding and the like.

The invention discloses a SnO2 composite carbon nanotube electric heating film and a preparation method thereof. The electric heating film is a tetragonal rutile structure and comprises a carbon nanotube and SnO2 with a mass ratio of 0.0002 to 0.002 : 1; A manufacture method comprises adde tin salt and modifier into a solvent to prepare a mixed solution, SnO2 composite carbon nanotube electrothermal film was prepared by adding modified carbon nanotube and stirring evenly to obtain electrothermal film precursor solution, spraying the electrothermal film precursor solution onto the coated substrate, and then annealing the coated substrate at 470 - 570 DEG C for 10 - 20 min to obtain SnO2 composite carbon nanotube electrothermal film. The electric heating film of the invention has small resistance, high emissivity, excellent thermal efficiency and strong chemical stability, and can replace the existing heating element with poor thermal efficiency and heat resistance, and is energy-savingand environmentally friendly. At that same time, the manufacture method is simple, energy-saving and environment-friendly, and can be industrialized.

The invention provides the BGA package fixing structure of an LED module, which comprises an LED module, a PCB and a BGA surface-mount welding jig. The LED module is a light source device of a BGA package. The welding spots of a salient point array are positioned on the back surface of a BGA package substrate. An LSI chip is located on the front surface of the BGA package substrate. An LED light-emitting tube and a matching circuit, which are packaged and fixed by the mold or filled resin material, are arranged Inside the LSI chip. The LSI chip is electrically connected with the salient point array. The PCB is provided with a BGA light-source bonding pad. The BGA surface-mount welding jig is a positioning plate. The positioning plate is provided with more than one light source fixing hole. During the surface-mounting or welding process of the LED module, the positioning plate is detachably fixed on the PCB. The LED module is subjected to surface-mounting positioning or welding positioning on the PCB through the light source fixing hole. When the LED module is welded and fixed on the PCB, the positioning plate is taken down. According to the technical scheme of the invention, high-availability LED light sources can be manufactured through the BGA package.

The invention discloses a packaging piece based on a substrate and adopting a slotting technology and a manufacturing process of the packaging piece. The packaging piece is mainly composed of a lead frame, a PAD, a solder ball, conducting adhesive, a chip, a bonding wire and a plastic package body. The PAD and the solder ball are arranged on the lead frame, and a notch is formed in the lead frame. The chip is connected into the notch of the lead frame through the conducting adhesive, and welding spots on the chip are connected with the PAD on the lead frame through the bonding wire. The chip, the bonding wire, the solder ball and the lead frame form a power and signal channel of a circuit. The plastic package body wraps the lead frame, the PAD, the solder ball, the chip and the bonding wire. The procedures of the manufacturing process are wafer thinning, scribing, substrate slotting and ball replacing, chip installing, installed chip baking, bonding, plasma cleaning, post curing, plastic packaging and product finishing. According to the packaging piece based on the substrate and adopting the slotting technology and the manufacturing process of the packaging piece, electric heating performance of the chip is improved, and the performance of the whole packaging piece is improved greatly.

The invention provides a semiconductor packaging structure and a preparation method thereof. The structure comprises a substrate, a photothermal conversion material layer, a rewiring layer, a first antenna layer, a conductive column, a plastic package material layer, a second antenna layer, a metal bump and a chip, the photothermal conversion material layer is located on the upper surface of the substrate; the rewiring layer is located on the upper surface of the photothermal conversion material layer; the first antenna layer is located on the upper surface of the rewiring layer; the conductive columns are located on the upper surface of the first antenna layer; the plastic package material layer wraps the first antenna layer and the conductive column, and the upper surface of the conductive column is exposed on the upper surface of the plastic package material layer; the second antenna layer is located on the upper surface of the plastic package material layer; the metal bump is located on the upper surface of the second antenna layer; and the chip is located on the upper surface of the metal bump. According to the invention, interconnection of the chip and the plurality of antenna layers in the vertical direction can be realized to ensure good conduction of the upper layer and the lower layer, the size of the packaging structure can be reduced, the integration level and the performance of the device can be improved, and the production cost can be reduced.

The invention provides a textile material with a flexible electric heating function and a preparation method of the textile material. The textile material is of a stack structure; the textile materialcomprises a first textile material layer, a first flexible insulation layer, a flexible heating layer, a second flexible insulation layer and a second textile material layer which are distributed sequentially from bottom to top; the flexible heating layer material is liquid metal and is electrically connected with one end of an electrode; and the other end of the electrode is connected with a power source. The liquid metal is heated under an electrified condition, so that the electric heating function of the textile material is realized. The textile material is comfortable to wear. The stability of the electric heating can be kept when the textile material is deformed. Therefore, the textile material has a bright application prospect in the field of clothes and other environments needingheating.

The invention discloses an iron-based amorphous alloy, a preparing method of the iron-based amorphous alloy and application of the iron-based amorphous alloy to an electrical heating material. The iron-based amorphous alloy is composed of FeaTibNicBdPeCfMg, wherein a, b, c, d, e and f are all atom percents, a is larger than or equal to 45 and smaller than or equal to 70, b is larger than or equalto 10 and smaller than or equal to 25, c is larger than or equal to 3 and smaller than or equal to 20, d is larger than or equal to 5 and smaller than or equal to 15, e is larger than or equal to 1 and smaller than or equal to 6, f is larger than or equal to 0.5 and smaller than or equal to 3, g is larger than or equal to 1 and smaller than or equal to 5, and the sum of the a, the b, the c, the d,the e, the f and the g is 100; and the component M is at least one of Zr, Y, Ta and Hf. The iron-based amorphous alloy electrical heating material has the good electric heating performance, the low temperature coefficient of resistance is achieved, and the low coefficient of linear expansion is achieved. The iron-based amorphous alloy has the high abrasive resistance, the high corrosion resistance and the good toughness, can be widely applied to various electric heating devices, and has the important industrial application values.

The invention discloses a method for preparing silicon carbide/molybdenum disilicide composite ceramics by reaction sintering. ~15% molybdenum, 15%~25% graphite; B. After mixing the main raw materials evenly, add polyvinyl alcohol as a binder and tetramethylammonium hydroxide as a dispersant, and prepare silicon carbide composite by mechanical ball milling powder; C, placing the granulated powder in a mold and forming it once by dry pressing to obtain a green body; D, placing the above-mentioned green body on a graphite plate, and then placing a metal silicon chip on the green body, and the green body The weight ratio to the metal silicon sheet is 1:2.5-3.5, and the silicon carbide/molybdenum disilicide composite ceramic is obtained by high-temperature silicon infiltrating sintering at 1500-1600°C for 3-6 hours.

The invention discloses a preparation method and the application of polyimide varnish. The method comprises the steps of dissolving the refined aromatic diamine and aliphatic diamine into the refined organic solvent, then adding the refined aromatic dianhydride in batches, and stirring and reacting for several hours under the protection of low-temperature inert gas to obtain polyimide varnish; after the varnish is filtered for multiple times, covering the surfaces of microelectronic devices with the varnish such as rectifiers, diodes, triodes, high-power silicon controlled rectifiers, high-voltage silicon stacks, thyristors and the like and large-scale integrated circuit patterns by adopting methods such as drop coating, roller coating, silk-screen printing and the like, and high-insulation, high-strength and then obtaining low-expansion electronic components through stepped heating and curing. The method has the advantages of accessible raw materials and simple operation, and is suitable for large-scale industrial production.

The invention relates to the technical field of liquid electric heating, in particular to a small-size high-efficiency electric heating device with a waste heat recovery function. The device comprisesa plurality of electric heating tubes, the plurality of electric heating tubes communicates with each other through connecting tubes to form a liquid electric heating channel, a heat conduction shellare arranged outside the electric heating tubes in a sleeved mode, the upper ends and the lower ends of the electric heating tubes are fixed together with the heat conduction shell through fixing pieces, the heat conduction shell is integrally formed with a water inlet tube, and the water inlet tube communicates with the water inlet end of the liquid electric heating channel. According to the device, a liquid electric heating assembly can effectively reduce the size of the assembly under the same power, the occupied volume of the space is reduced, meanwhile, heat can be recycled, so that theheat efficiency is improved, the energy is saved, the environment is protected, and meanwhile, the temperature of the outer sleeve shell is kept low and the outer sleeve shell is convenient to use ina narrow space.

The invention mainly aims to provide transparent graphene ink and a preparation method thereof, heating glass using the transparent graphene ink and a preparation method of the heating glass. The transparent graphene ink is prepared from the components in percentage by mass: 10%-40% of a graphene dispersion solution, 40%-60% of a conductive polymer aqueous solution, 5%-10% of a adhesion promoter,1%-5% of a surfactant, and the balance of deionized water; the preparation method includes the steps that the deionized water, the graphene dispersion solution and the conductive polymer aqueous solution are mixed, and ultrasonic dispersion is conducted; the adhesion promoter and the surfactant are added to ultrasonic dispersion, and homogeneous dispersion is conducted to obtain the transparent graphene ink; and the transparent graphene ink is applied on the surface of the a glass substrate and dried; conductive materials are applied on both sides of a graphene ink layer and dried to obtain the heating glass. The transparent graphene ink is high in light transmittance, good in adhesion and low in sheet resistance, when the transparent graphene ink is applied to the glass, the glass can beheated at the low voltage, the anti-fog deicing and snow removal effects are achieved, and thus the transparent graphene ink is more practical.