37results about How to "Geometry is easy to control" patented technology

The invention relates to the technical field of cemented carbide preparation, in particular to surface-hardened gradient cemented carbide and a preparation method thereof. By adjusting components of an alloy binding phase, the WC crystalline grains in the prepared cemented carbide are small, even in distribution, high in density and remarkable in gradient, the cemented carbide is made to have the more excellent mechanical property, and the red hardness of the cemented carbide is improved. The components and thickness of a gradient layer of the cemented carbide are controlled by adjusting blank formulas, sintering temperature, sintering time and other parameters, the surface layer of the cemented carbide is made to be rich in cubic phase and poor in binding phase, and due to the fact that a transition layer rich in alloying binding phase is arranged below the surface layer, the cemented carbide is excellent in hardness, wear resistance and roughness, and the cemented carbide can be used for metal machining. The cemented carbide prepared through the method has the excellent wear resistance, strength, hardness and toughness at the same time. According to the method, the functional gradient cemented carbide can be produced by slightly modifying existing equipment and processes, and is suitable for industrial production.

A hydrogel-conductive polymer nano-composite material with biological activity and the synthesis method relate to a biological activity material; firstly, polyethylene glycol and hydroxy acid are synthesized to obtain glycol-hydroxy-acid block copolymer under the catalysis of tin octoate; the copolymer, acryloyl chloride and triethylamine are reacted to get glycol-hydroxy-acid block copolymer terminated with acrylic group; the copolymer is then dissolved in water to get gel through photoinitiated crosslinking or free radical crosslinking; finally, the gel is swelled with pyrrole or aniline monomer solution to get the nano-composite material of the glycol-hydroxy-acid block copolymer and the polypyrole or polyaniline through the polymerization under the effect of initiators. Through the copolymerization with hydroxy acid, PEG is endowed with gel system biodegradability; besides, the honeycomb holes of the hydrogel film material can provide composite spaces for conductive polymers; the biological activity of the polypyrole and polyaniline enables the hydrogel to be endowed with biological activity after combination and has nano-enhancing effects to the gel system.

Multi-shelled capsules are made by co-extruding a first liquid flavorant composition and a first shell-forming polymeric material to form droplets which are hardened to form an inner shell containing a first liquid flavorant composition, and then coated with a second shell-forming polymeric material which is hardened to form an outer shell. The result is a capsule where the inner surface of the outer shell is separate and/or separable from the outer surface of the inner shell to define a space, wherein a second liquid flavorant composition may be located.

The invention provides a chemical method for synthesising a silver selenide semiconductor photoelectric film material in situ at a room temperature. The method comprises the following steps of: dissolving elementary-substance Se powder in Na2S aqueous solution to form orange-yellow solution; placing a substrate material sputtered with an elementary-substance silver film on the surface and the solution aforementioned in the same container; and growing the Ag2Se semiconductor photoelectric film material on the surface of the substrate in situ via a short-time reaction in a temperature range from 7 to 35 DEG C. The reactants are low in price, has no need of being further purified, green and environment-friendly, and any surfactant or other chemical additives are not required; room-temperature reaction conditions are moderate, energy consumption is little, and influence on a conducting substrate is avoided; and the chemical method is fast in reaction, convenient in operation, and controllable in process. The chemical method provided by the invention overcomes the defects of dependence on high vacuum, high energy consumption and high production cost, high reactant toxicity, complex film-forming process and the like of the existing preparation process for an Ag2Se semiconductor photoelectric film material, and is beneficial to large-scale production and industrial application.

The invention discloses an efficient and precise machining method for a composite material. The thickness and the heated degree of a heated area of the composite material are regulated accurately through time domain shaping ultrafast lasers; the thickness of easily-machined loose oxide generated in the manner that a matrix phase and a reinforced phase of the material are subjected to a chemical reaction through gas assisting under the heat effect is controlled; conditions are created for achieving precise machining by directly removing a loose oxide layer subsequently through cutting/grindingmachining; and machinability of the material is greatly improved.

The invention relates to a method for synthesizing a silver oxide semiconductor thin-film material through room temperature in-situ control. The method is characterized by comprising the following steps: putting a substrate material, the surface of which is covered by an elementary substance silver thin film, in a UV-03 reactor, maintaining the relative humidity of a system to 30-90%, and reacting for 1-2 hours at the temperature of 10-40 DEG C under the condition of oxygen or air existence so as to obtain the AgxO(AgO or Ag2O) semiconductor thin-film material on the surface of a substrate in situ, wherein the UV-03 reactor is a UV-03 cleaning machine. According to the method, solvents, surface active agents or other chemical additives are not needed in a reaction process. The method is simple to operate and low in energy consumption and preparation cost and has wide industrial application prospect.

The invention belongs to the technical field of displayer structures, solves the technical problems that in the prior art, a microcapsule film layer has no transformation possibility, and the stretchability of hydrogel is reduced after the hydrogel loses water, and provides a stretchable microcapsule film for reflective display and a preparation method thereof. The stretchable microcapsule film comprises a transparent electrode layer, a display film layer and a stretchable driving backboard which are tightly bonded from top to bottom in sequence, and the display film layer comprises hydrophilic light resin and microcapsules evenly distributed in the hydrophilic light resin; the transparent electrode layer comprises a first hydrophobic light resin layer and a nanowire film which is semi-embedded into the first hydrophobic light resin layer, the stretchable driving backboard comprises an elastic substrate made of a second hydrophobic light resin layer and a driving circuit, and the driving circuit is constructed on the elastic substrate and has a stretchable structure. The stretchable microcapsule film for reflective display and the preparation method have the advantages that the microcapsule film layer has the possibility of transformation, and the stretchability of the hydrogel is not affected after the hydrogel loses water.

The invention belongs to the technical field of electrode base materials, and provides a preparation method of titanium foam. The method comprises the steps that coke is adopted as a pore forming agent and mixed with titanium powder to be sintered, the pore forming agent is removed, and the titanium foam is obtained, wherein the volume ratio of the coke to the titanium powder is (0.5-2):1, the grain size of the coke is 1-6 mm, the sintering temperature is 1,400-1,600 DEG C, and the grain size of the titanium powder is 400 meshes. The preparation method specifically comprises the following steps that S1, the coke and the titanium powder are compacted after being mixed to obtain a mixed sample; S2, the mixed sample is sealed, vacuumizing is performed repeatedly, argon is introduced till foreign gas is exhausted; S3, the temperature is increased to 1,400-1,600 DEG C, and sintering is performed; and cooling is performed to the room temperature to obtain a titanium foam midbody; S4, the midbody is placed into a coke gasification small fixed bed reaction device, the temperature is increased to 1,100 DEG C, CO2 is introduced with the flow being 400-600 ml/min, the reaction is performed for a period of time, heating is stopped, cooling is performed to reach the room temperature. According to the technical scheme, the prepared titanium foam is adopted as an anode, electro-catalysis treatment is performed on the coked wastewater, the number of active loci is large, and the degradation efficiency is high.

The invention discloses a self-supporting carbon-based TiO2 electro-catalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out ultrasonic cleaning and drying on expanded graphite powder; putting into an aniline-ethanol solution, and carrying out ultrasonic treatment; adding the EG-PAN into a hydrochloric acid-sulfuric acid mixed acid solution, adding ammonium persulfate while stirring, stirring at low temperature, filtering and drying to obtain EG-PAN powder; the preparation method comprises the following steps: weighing EG-PAN powder, and mixing the EG-PAN powder with tetrabutyl titanate and absolute ethyl alcohol to obtain a mixed solution A; mixing absolute ethyl alcohol, deionized water and concentrated nitric acid according to a certain volume ratio to obtain a mixed solution B; dropwise adding the mixed solution B into the mixed solution A, and standing until a non-flowing gel system is formed; drying in a drying oven to obtain black gray particles; and grinding the mixture into powder, and calcining the powder to obtain EG-PAN-TiO2 powder. The prepared self-supporting carbon-based TiO2 electro-catalytic material can be formed at a time, and the electro-catalytic oxygen reduction reaction efficiency is effectively improved.