33results about How to "Low post-treatment temperature" patented technology

Disclosed are a self-heat-release pressureless sintered conductive silver paste and a preparation method therefor. The self-heat-release pressureless sintered conductive silver paste comprises the following raw materials in weight percentage: 20% to 60% of a nano silver powder, 30% to 70% of a solvent, 2% to 10% of a nano thermite, 0.1% to 2% of a dispersing auxiliary, and 0.1% to 5% of an organic carrier. By introducing the nano thermite having a redox exothermic effect in the nano silver paste, an exothermic reaction can be initiated at 200℃ to 250℃, such that the self-heat-release pressureless sintered conductive silver paste has a low post-treatment temperature, high temperature resistance, high thermal conductivity, and high bonding properties, can significantly improve the reliability of packaged devices, and is suitable for bonding and heat dissipation of the third generation of wide-gap semiconductor chips.

A preparation method for tin-based oxide nanorods includes the following steps of weighing one of rare earth nitrate, rare earth oxide, rare earth ocyhydrate or rare earth carbonate according to stoichiometric ratio of metallic elements in Sn1-xREx02-delta, weighing one of rare earth nitrate, rare earth oxide, rare earth ocyhydrate or rare earth carbonate to prepare nitric acid rare earth solution, then weighing SnC14.5H2O to be dissolved to the prepared nitric acid rare earth solution and obtaining mixed solution, then respectively weighing an appropriate amount of organic fuels, a combustion improver of ammonium nitrate and soluble chloride to be dissolved to the mixed solution; after heating the mixed solution to concentrate the solution to a state of being approximately sticky, heating in microwave mode, and initiating self-spreading burning; roasting the self-spreading burning product in the air, after cooling, washing in ultrasonic mode, filtering, removing constitution ions of the chloride, and drying at 80 DEG C. The preparation method shortens technological process, lowers preparation cost, and is simple in synthesis equipment, low in post-treatment temperature and short in time, and easy for achieving industrialized preparation.

The invention discloses a preparation method of high-adhesion adhesive-free flexible copper-clad plates, and the preparation method comprises the following steps: firstly, dissolving a mixture of a benzimidazole structure containing aromatic diamine monomer (I) and a benzoxazine and benzoxazole structure containing aromatic diamine monomer (II) into N-methyl-2-pyrrolidone (NMP), and then adding an aromatic diamine monomer (III) into the obtained mixture so as to obtain an intermediate polyamide acid; then, adding water-carrying agents dimethyl benzene and chlorobenzene into the intermediate polyamide acid so as to obtain a polyimide solution; and removing the water-carrying agents through steaming, and pouring reaction liquid into methanol so as to obtain a precipitate; and completely washing, filtering and drying the precipitate through the methanol and anhydrous diethyl ether so as to obtain polyimide powder, preparing the polyimide powder into a solution, coating the obtained solution on a copper foil, and in a high-temperature drying tunnel, in the presence of nitrogen, removing solvents so as to obtain a high-adhesion adhesive-free flexible copper-clad plate. A product prepared by using the method disclosed by the invention has the characteristics of high peel strength and no crimping, and a resin layer cladded on a copper foil is excellent in mechanical properties and heat resistance and low in water absorption.

The invention discloses graphene-based water-based ink and an application thereof in ink-jet printing of a patterning transparent conducting electrode, belonging to the technical field of electronic printing materials. The graphene-based water-based ink comprises an ink active component and a solvent, wherein the ink active component is graphene, graphene oxide, a compound of the graphene and a silver nanoparticle or a compound of the graphene oxide and the silver nanoparticle, and the weight percent of the ink active component is 0.1%-20%; and the solvent is water or a water liquid with an organic solvent added. Compared with the prior art, the graphene-based water-based ink disclosed by the invention has the characteristics of environment friendliness, simple preparation process and low post-processing temperature, can obtain a high-transparency electrode with preferable conductivity and can be applied to the technical field of electronic printing materials. Besides, the preparation method of the graphene-based water-based ink has high practical application value.

The invention discloses a wear-resistant and flame-retardant swash plate. The swash plate comprises a base plate and a wear-resistant coating, wherein the wear-resistant coating comprises base resin, silicon-containing phosphate, PTFE (polytetrafluoroethylene) particles, graphite fluoride and composite filler. The wear-resistant paint disclosed by the invention is reasonable in composition and has excellent heat resistance and adhesion. The swash plate based on the wear-resistant paint has excellent wear resistance and flame retardance, has dry state or oil state friction property far better than that of swash plates prepared from the existing resin, and can meet the requirements of auto air conditioning compressors.

The invention discloses graphene oxide and gold nanorod composite ink and a preparing method of the graphene oxide and gold nanorod composite ink and belongs to the technical field of electronic printing materials. According to the method, a group, with negative charges, on the surface of a gold nanorod is replaced with a group with positive charges, and then the graphene oxide and gold nanorod composite ink which can evenly disperse in water is prepared by mixing graphene oxide and the gold nanorod with the positive charges on the surface ultrasonically. The graphene oxide and gold nanorod composite ink which can evenly disperse in water and prepared with the method is stable in performance and can be used for ink-jet printing. The graphene oxide and gold nanorod composite ink prepared with the method has the advantages that environmental friendliness is achieved, the preparing process is simple, and the aftertreatment temperature is low; in addition, patterns high in electrical conductivity and stability can be obtained, and the graphene oxide and gold nanorod composite ink can be widely applied to the technical field of electronic printing materials.

The invention relates to a preparation method of a nonlinear optical crystal surface antireflection protective film. Starting with the sol characteristic and film layer structure on the basis of the characteristic of high tendency to deliquescence of the nonlinear optical crystal growing in a water-soluble environment, the invention provides a preparation method of a moistureproof+antireflection double-layer antireflection protective film which has higher laser injury threshold and high environment-resisting stability. The moistureproof film layer material is prepared from silanolate containing hydrophobic group, and thus, has the characteristics of compact structure and low surface energy; and water molecules in air are isolated from the crystal, thereby enhancing the deliquescence resistance. The moistureproof film layer material is prepared from silanolate containing hydrophobic group, and thus, has the characteristics of compact structure and low surface energy; and water molecules in air are isolated from the crystal, thereby enhancing the deliquescence resistance. The method can implement novel complex functions of the nonlinear optical crystal protective film, and ensure the long-term stable operation of the crystal in a high-power laser system.

The invention belongs to the technical field of electronic printing materials, and discloses silver-wrapped-in-gold and graphene based aqueous ink and an application of a transparent patternconduction electrode obtained through ink-jet printingof the silver-wrapped-in-gold and graphene based aqueous ink. The prepared silver-wrapped-in-gold and graphene based aqueous inkcomprises an ink active component, a solvent and an additive, wherein the ink active component adopts composition of graphene and silver-wrapped-in-gold nano-particles or composition of graphene oxide and silver-wrapped-in-gold nano-particles; the mass percentage of the ink active component is 0.1%-30%, the mass ratio of the silver-wrapped-in-gold nano-particles to the grapheneor the graphene oxide is smaller than or equal to 100%, and the volume of the additive is 0%-2% of that of a solvent; and the diameter of each of the graphene and the graphene oxide is smaller than 2 mu m. Compared with the prior art, the prepared silver-wrapped-in-gold and graphene based aqueous ink has the characteristics of environmental protection, simple preparation process and low aftertreatment temperature, the electrode with better conductivity and stability can be acquired, and the ink can be applied to the technical field of electronic printing materials.

The present invention mixes high-temperature glue and ceramic particles with a certain particle size distribution to prepare a composite modification liquid, and realizes a full range of modification (several nanometers to hundreds of micrometers) on the defects existing on the dense film. Among them, ceramic particles are used to modify large defects on the dense film (such as greater than 5nm), and high-temperature glue is used to modify small defects on the dense film (such as less than 5nm); in addition, the use of high-temperature glue can significantly improve the leveling performance of the modification liquid , and serve the purpose of bonding and toughening the ceramic particles, thereby reducing the post-treatment temperature. The composite modification solution prepared by the invention is used to coat and modify the surface of the defective dense membrane, and the ceramic particles and high-temperature glue only fill the defective part and are not adsorbed on the surface of the dense membrane. The method can achieve a defect filling rate close to 100%, has the advantages of simple process and good repeatability, and is suitable for large-scale dense film defect filling.

The invention provides a method for preparing a high cis-diene polymer, comprising: performing polymerization reaction on a reaction solution comprising a diene monomer, liquid propane and a rare earth composite catalyst in an anhydrous and oxygen-free airtight container to obtain a high-cis-diene polymer A cis-diene polymer; the diene monomer is liquid butadiene and / or isoprene; the filling degree of the reaction solution in a closed container is 30-70%. The present invention uses liquid butadiene and / or isoprene as raw material, propane with low boiling point as solvent, under anhydrous and anaerobic airtight conditions, the polymerization reaction is carried out through the catalysis of rare earth composite catalyst, after the reaction, the propane is heated at room temperature It can be volatilized at a low temperature, which reduces the solvent residue in the product, and the obtained product is easy to recover and separate, reduces the post-treatment temperature of the product, and saves energy.

The invention discloses a preparation method of a wear-resistant and flame-retardant swash plate. The prepared swash plate comprises a base plate and a wear-resistant coating, wherein the wear-resistant coating comprises base resin, silicon-containing phosphate, PTFE (polytetrafluoroethylene) particles, graphite fluoride and composite filler. The wear-resistant paint disclosed by the invention is reasonable in composition and has excellent heat resistance and adhesion. The swash plate based on the wear-resistant paint has excellent wear resistance and flame retardance, has dry state or oil state friction property far better than that of swash plates prepared from the existing resin, and can meet the requirements of auto air conditioning compressors.

The invention discloses a swash plate based on cyanate. The swash plate consists of a substrate and a wear-resistant coating, wherein the wear-resistant coating is prepared from the following ingredients in parts by mass: 40-60 parts of cyanate / epoxy resin copolymer, 20-50 parts of PTFE (Polytetrafluoroethylene), 10-30 parts of molybdenum disulfide, 5-10 parts of graphite fluoride and 1-10 parts of reinforcing material. According to the swash plate disclosed by the invention, the wear-resistant coating is reasonable in composition and excellent in heat resistance and adhesion, thus the swash plate based on the wear-resistant coating has excellent wear resistance, has the friction performance, which is far superior to that of the existing swash plates prepared from resin regardless of whether the swash plate is in a dry state or oil state, and can meet the needs of an automotive air conditioner compressor.

The invention provides a synthesis method of high-cis polydiolefin. The method comprises the steps as follows: a reaction solution containing a diene monomer, liquid isobutene and a rare earth composite catalyst is subjected to a polymerization reaction in a water-free and oxygen-free closed container, and high-cis polydiolefin is obtained; the diene monomer is liquid butadiene and / or isoprene; the filling degree of the reaction solution in the closed container is 30%-70%. The liquid butadiene and / or isoprene is taken as a raw material, isobutene with the low boiling point is taken as a solvent, the polymerization reaction is preformed through catalysis of the rare earth composite catalyst under the water-free and oxygen-free closed condition, isobutene can volatilize at the room temperature after the reaction ends, the residual solvent in a product is reduced, the obtained product is easy to recover and separate, the post-treatment temperature of the product is reduced, and energy issaved.

The invention discloses a method for preparing a swash plate based on bismaleimide. The method comprises the steps of preparing a bismaleimide / diallyl bisphenol A copolymer, preparing a wear-resistant coating, spraying and curing, wherein the wear-resistant coating is prepared from the following ingredients in parts by mass: 40-60 parts of bismaleimide / diallyl bisphenol A copolymer, 20-50 parts of PTFE (Polytetrafluoroethylene), 10-30 parts of molybdenum disulfide, 5-10 parts of graphite fluoride and 1-10 parts of reinforcing material nano aluminum oxide. According to the method for preparing the swash plate based on bismaleimide, disclosed by the invention, the wear-resistant coating is reasonable in composition and excellent in heat resistance and adhesion, thus the swash plate based on the wear-resistant coating has excellent wear resistance, has the friction performance, which is far superior to that of the existing swash plates prepared from resin regardless of whether the swash plate is in a dry state or oil state, and can meet the needs of an automotive air conditioner compressor.

The invention relates to jet conductive ink, which is film printing electronic paste and is suitable for ink jet printing, and belongs to the field of printed electronics. The jet conductive ink comprises the following components in portion by weight: 1 to 29 portions of conductive particles, 60 to 85 portions of solvent, 1 to 5 portions of humectant, 1 to 5 portions of pH regulator, 1 to 5 portions of surfactant, and 1 to 3 portions of bonding material. The cost of a method for the jet conductive ink is low, and the conductive silver in the conductive paste is reduced to less than 29 portionsby weight; the method has a mild post treatment process, and the post treatment temperature of a printed product is reduced to about 100 DEG C by using nano silver to replace micro silver; and through an ink jet printing mode as required, the thickness of an obtained conductive film is about 1 micron, and the resistance reaches about 1 ohm.

The invention discloses digital ink-jet conductive ink and a preparation method thereof. The ink is prepared from pigments, graphene, a hyperbranched polymer, hyperbranched polymerization nano conductive particles, a photosensitizer and a solvent; uniform dispersion of graphene and a conductive particle solution is realized with a blending technology, and the prepared ink has good stability and redispersibility. The preparation method is simple; compared with conventional ink, the digital ink-jet conductive ink has the advantages of being high in conductivity, thin in printing film layer, uniform, smooth and good in performance, is applicable to multiple printing processes and substrates and is particularly applicable to the field of intelligent textile.

The invention discloses a method for preparing a swash plate based on cyanate. The method comprises the steps of preparing a cyanate / epoxy resin copolymer, preparing a wear-resistant coating, spraying and curing, wherein the wear-resistant coating is prepared from the following ingredients in parts by mass: 40-60 parts of cyanate / epoxy resin copolymer, 20-50 parts of PTFE (Polytetrafluoroethylene), 10-30 parts of molybdenum disulfide, 5-10 parts of graphite fluoride and 1-10 parts of reinforcing material. According to the method for preparing the swash plate based on cyanate, disclosed by the invention, the wear-resistant coating is reasonable in composition and excellent in heat resistance and adhesion, thus the swash plate based on the wear-resistant coating has excellent wear resistance, has the friction performance, which is far superior to that of the existing swash plates prepared from resin regardless of whether the swash plate is in a dry state or oil state, and can meet the needs of an automotive air conditioner compressor.