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1217results about How to "Reduce clumping" patented technology

Method for preparing high dielectric constant polymer-based nano composite material

InactiveCN103147226AHigh dielectric constantControllable dielectric constantNon-woven fabricsFiberMatrix solution
The invention provides a method for preparing high dielectric constant polymer-based nano composite material. The method comprises the following steps: performing electrostatic spinning on a polymer matrix solution and simultaneously performing electrostatic spraying on a filler particle suspension; simultaneously receiving the products of the electrostatic spinning and the electrostatic spraying through a common receiving device to obtain a composite fiber membrane; and finally obtaining the high dielectric constant polymer-based nano composite material with filler particles uniformly dispersed after the composite fiber membrane is processed through a hot-pressing processing technique. The composite material prepared by the invention has the characteristics of high dielectric constant, low dielectric loss and the like; and at the same time the dielectric constant of the composite material can be adjusted through adjusting the content of the filler particles in the polymer matrix. The invention has the advantages of simple process, convenient operation and little environment pollution, can well solve the problem that the filler particles is uniformly dispersed in the polymer matrix, and is expected to the microelectronic industry as dielectric material and the like for preparing embedded capacitors.
Owner:JIANGXI NORMAL UNIV

High-entropy alloy particle reinforced aluminum base composite material and stirring casting preparation process thereof

ActiveCN105478724AAvoid interfacial chemical reactionsAvoid formingHigh entropy alloysToughness
The invention discloses a high-entropy alloy particle reinforced aluminum base composite material and a stirring casting preparation process thereof. The preparation process adopts mechanical alloying to prepare high-entropy alloy powder and screen to obtain high-entropy alloy particles; the high-entropy alloy particles are sealed by adopting an aluminum alloy pipe having the same material with a basal body; the aluminum alloy pipe weighed in a segmented manner is added in the molten basal body; the high-entropy alloy particles are dispersed by a stirring mode; and the high-entropy alloy particle reinforced aluminum base composite material is prepared by a casting process. The high-entropy alloy particles are 0.1-35%; aluminum alloys are 65-99.9%; and the sum of the two is 1. The high-entropy alloy particles in the structure of the prepared composite material are uniformly dispersed; the high-entropy alloy and aluminum alloy interface bonding compatibility is excellent; the strength and the toughness are excellent; the preparation process is simple; the powder has no need to be treated; the cost is low; the stability is good; and the composite material is suitable for large-batch production and standard production, and is excellent in promotion and application prospect.
Owner:GUANGDONG XINGFA ALUMINUM +1

Preparation method of polypropylene nano composite material

The application of the invention discloses a preparation method of a polypropylene nano composite material, which comprises the following steps of: (1) proportionally fusing and blending inorganic nano particles and maleic anhydride grafted polypropylene on an internal mixer, an open mill or a screw extruder to obtain a reinforcing agent master batch; (2) proportionally fusing and blending a beta crystal type nucleating agent and the maleic anhydride grafted polypropylene on the internal mixer, the open mill or the screw extruder to obtain a flexibilizer master batch; and (3) proportionally diluting and dispersing the reinforcing agent master batch and the flexibilizer master batch in a polypropylene high-polymer substrate, and carrying out injection molding to obtain the polypropylene nano composite material. With the preparation method, the technical problem that the nano particles and the nucleating agent agglomerate in the polypropylene substrate is well solved; when the flexibility of the modified polypropylene material is greatly improved, strength, rigidity, heat deflection temperature and other parameters are also improved to a certain extent, and simultaneously the density of the material is hardly increased so that a series of high-strength, high-flexibility and high-heat resistance modified polypropylene materials can be prepared.
Owner:CHINA PETROLEUM & CHEM CORP +1

Method for preparing antioxidant soldering powder

The invention relates to a method for preparing antioxidant soldering powder, comprising the following steps: adding soldering powder to solution containing 5-25 percent by weight of active agent and 2-20 percent by weight of coating agent; stirring the active agent, the coating agent and the soldering powder at the temperature of 30-80 DEG lower than the soldering powder melting point so that the soldering powder suspending in the solution for 10-90 min; and filtering the solution, eluting the solution with solvent and drying the solution in vacuum to obtain the antioxidant soldering powder. The invention is suitable for coating the alloy soldering powder such as SnPb soldering powder, SnPbAg soldering powder, SnPbBi soldering powder, SnBi soldering powder, SnCu soldering powder, SnBiCu soldering powder, SnAg soldering powder, SnAgCu soldering powder and SnZn soldering powder of any particle size and is particularly suitable for coating the alloy soldering power of small particle size or the alloy soldering power which is easily oxidized. The soldering powder is coated by removing an oxidation layer on the surface of the soldering powder, thus the effect of coating the soldering power with the coating agent is improved, the shelf life of the soldering powder is prolonged, the requirements for the package, the storage and the transportation of the soldering powder are lowered, the cost is saved and the waste of the resources is reduced.
Owner:BEIJING COMPO ADVANCED TECH

Bottom surface-integrated wear-resistant fluorosilicone-based super-amphiphobic coating, and preparation method and application thereof

The invention discloses a bottom surface-integrated wear-resistant fluorosilicone-based super-amphiphobic coating, and a preparation method and application thereof. The preparation method comprises the following steps: 1) performing synergistic modification treatment on two or more nanoparticles to obtain modified blended particles; 2) adding the blended modified particles into a dispersing solvent, performing ultrasonic dispersion for 1 to 2 hours and then mechanically stirring; 3) adding a certain amount of tert-butyl acetate into fluoro-siloxane resin and performing shearing dispersion to obtain substrate material emulsion; 4) mixing the blended modified particle turbid liquid in the step 2 and the substrate material emulsion in the step 3, adding a coupling agent, heating, stirring anddispersing, and performing dispersion by a high-speed shearing dispersing machine to obtain super-amphiphobic coating; and 5) stirring the super-amphiphobic coating uniformly, spray-coating the surface of an object with the super-amphiphobic coating and drying at room temperature for 10 to 30 minutes to successfully prepare the wear-resistant integrated super-amphiphobic coating. The wear-resistant super-amphiphobic organic-inorganic hybrid coating is obtained by connecting a fluorine-silicon substrate and the blended modified particles through chemical grafting copolymerization reaction.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1

Preparation method of nano-particle reinforcement magnesium-based biocomposite material

InactiveCN103866168AImprove uniformityRefinement of Magnesium Alloy Matrix GrainCrystalliteCeramic particle
The invention relates to a preparation method of a nano-particle reinforcement magnesium-based biocomposite material. The preparation method comprises the following steps: (1) melting a matrix alloy raw material to form a melt; (2) mixing and grinding Ca-P ceramic particle powder after pre-heating treatment and pure magnesium particle powder; (3) adding the grinded mixed powder to the melt to mechanically stir, and then carrying out secondary stirring on the composite melt added with particles by adopting a melt shearing stirring device to obtain magnesium-based composite material melt sizing agent; (4) pouring the melt sizing agent into a preheating casting mould, and cooling to room temperature to obtain an as-cast magnesium-based composite material; and (5) carrying out equal channel angular pressing on the as-cast magnesium-based composite material after heating to improve distributive uniformity of the ceramic particles to prepare the target object, namely the nano-particle reinforcement magnesium-based biocomposite material. By utilizing the preparation method, distributive uniformity of ceramic phase particles in a magnesium metallic matrix can be improved, grain size of the magnesium metallic matrix can be thinned, and combination property of the magnesium-based composite material can be improved.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY

Modification method for super-hydrophobic packing particle for anti-contamination flashover coating and application

The invention discloses a modification method for super-hydrophobic packing particles for an anti-contamination flashover coating and application. The modification method comprises the following steps: 1) preparing a packing particle dispersion; 2) preparing an ethanol dispersion of a fluorinated silane coupling agent, and adjusting the pH value of the ethanol dispersion of the fluorinated silanecoupling agent to 3-5; 3) adding the fluorinated silane coupling agent into the dispersion obtained in the step 2), performing ultrasonic treatment to sufficiently hydrate the fluorinated silane coupling agent so as to obtain a fluorinated silane coupling agent solution for later use; 4) adding the fluorinated silane coupling agent solution prepared in the step 3) into the dispersion with the packing particles prepared in the step 1), and performing a heating stirring reaction to modify the surfaces of the packing particles; 5) drying the modified material, and grinding, thereby obtaining themodified packing particles. According to the modification method, the surfaces of the packing particles for the anti-contamination flashover coating are modified by using the fluorinated silane coupling agent, then the surfaces of the packing particles are hydrophobic but oleophilic, furthermore the hydrophobicity of the coating is improved, and the hydrophobic angle can be up to 150 degrees or larger.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1

Tungsten-copper alloy and production method thereof

The invention belongs to the field of alloy material production, and particularly relates to tungsten-copper alloy and a production method thereof. The tungsten-copper alloy and the production method thereof aim to solve the problem that alloy structures are not uniform because of two-phase segregation of tungsten and copper in tungsten-copper alloy produced through existing methods. According to the production method, after tungsten powder undergoes plasma spheroidization, copper powder serves as an inducer for chemical copper plating, then compression molding, pre-sintering and tungsten-copper infiltration are carried out, and finally the tungsten-copper alloy with uniform structures can be obtained. According to the method, the shape of the tungsten powder is changed into a spherical shape from a polygonal shape, the dispersity is improved, and uniform distribution of the tungsten and the copper in the chemical copper plating process is guaranteed. According to the produced alloy material, two-phase composition segregation of the tungsten and the copper can be effectively prevented, the thermal conductivity, the electrical conductivity, the arc ablation resistance, the high temperature performance, the plasticity and the machinability of the alloy material are greatly improved, and the alloy material can be widely applied to heat sink materials, encapsulating materials and high explosive anti-tank cartridge liner materials.
Owner:四川恒珲新材料科技有限公司
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