150results about How to "Stable manufacturing process" patented technology

The invention relates to a preparation method of a homodisperse carbon nano tube enhanced aluminium base composite material and belongs to the preparation technology of an aluminium base composite material. The method comprises the following steps: preparing catalyst precursor powder from nickel salt and aluminite powder by a dipping method; preparing Ni / Al catalyst by calcining the precursor powder, and then reducing the calcined precursor powder by utilizing hydrogen, or directly reducing the precursor powder by utilizing the hydrogen; carrying out catalytic pyrolysis reaction on the Ni / Al catalyst in a tubular furnace and the mixing gas of the introduced carbon source gas and carrier gas to prepare the composite powder of the carbon nano tube and aluminum; and preparing the homodisperse carbon nano tube enhanced aluminium base composite material block by carrying out cold pressing, sintering and hot extruding on the composite powder of the carbon nano tube and the aluminum. The invention has the advantages of simple and stable preparation process and promotion applicability; the obtained carbon nano tube is evenly dispersed on the surface of aluminium powder, and is well bonded with the interface of a substrate body; and the property of the aluminium base composite material is improved.

The invention relates to air-permeable microporous film masterbatch and further relates to a masterbatch containing plastic film and a preparation method thereof. The water-foamed, antibacterial and air-permeable microporous film masterbatch contains a polyolefin polymer, a modifier, a microporous water-absorbing inorganic expanded material, an initiator, a surfactant and a plastic antioxidant. The water-foamed, antibacterial and air-permeable microporous film contains the water-foamed, antibacterial and air-permeable microporous film masterbatch and blow-molded film plastics. The preparation method comprises the steps of granulating the masterbatch, then, carrying out water absorbing aging, adding the blow-molded film plastics, carrying out mixing, and adding the mixture into a foaming and extruding film blowing machine for extrusion, thereby preparing the film. The water-foamed, antibacterial and air-permeable microporous film provided by the invention has the characteristics of simple and stable preparation process, good processability and the like; a water foamer is adopted, is environment-friendly and safe and has an antibacterial function, and the extruded antibacterial and air-permeable film is controllable in micropore density, has the characteristics of fine and uniform open porous texture and cell size, and the like and has the characteristics of excellent comprehensive mechanical properties, environment-friendliness, easiness in recovery, and the like.

A process for preparing the acetylcholinesterase used to detect the content of residual agricultural chemical in fruit and vegetable includes such steps as extracting the coarse liquid extract from animal blood, purifying by ammonium sulfate deposition method, removing ammonium sulfate by dialysis method, concentrating and drying. Its advantages are widely available raw material, low cost and high purity and sensitivity of product.

The invention discloses a polypyrrole coated hard carbon cathode material and a preparation method thereof. The polypyrrole coated hard carbon cathode material adopts a hard carbon sphere as the substrate, which is coated with a polypyrrole layer. The preparation process comprises: taking glucose as the carbon source, preparing a hard carbon sphere material by a hydrothermal calcination method, taking ferric chloride hexahydrate as the oxidant, and preparing the polypyrrole coated hard carbon cathode material by an in-situ chemical oxidation method. The process involved in the invention is simple, has good repeatability, and has no need of adding additives. The prepared composite material has good electrical conductivity, thus being in favor of bringing the electrochemical performance of the lithium ion battery cathode material into play.

The invention discloses a process for spinning and molding a magnesium alloy sheet. The process comprises the following steps: a blank material is cut; a blank material of the magnesium alloy sheet is heated; a mould is heated; the blank material of the magnesium alloy sheet is clamped, spinned and molded; the edge of blank material is trimmed; and the blank material is subjected to postprocessing to obtain a finished product. With the technical proposal, the sheet has good molding capacity; a molded product has smooth surface and good tissue performance and dimension precision, thereby greatly improving the excellent and good rate of the product; the manufacturing process is rapid and stable, improves production efficiency, reduces the defective index, is more favorable for material molding and has less unedged scrap; and when a semifinished product is molded, less unedged scrap is produced, thereby effectively reducing production cost and obviously exalting the mechanical performance of the product.

An optoelectronic semiconductor device including: a substrate; a semiconductor system having an active layer formed on the substrate; and an electrode structure formed on the semiconductor system, wherein the electrode structure includes: a first conductivity type bonding pad; a second conductivity type bonding pad; a first conductivity type extension electrode; and a second conductivity type extension electrode, wherein the first conductivity type extension electrode and the second conductivity type extension electrode form a three-dimensional crossover; wherein the first conductivity type extension electrode and the second conductivity type extension electrode are on the opposite sides of the active layer.

The invention provides an I-type collagen-sodium alginate-polyvinyl alcohol composite film which comprises the following components by weight percent: 20% to 60% of I-type collagen, 20% to 60% of sodium alginate and 20% to 60% of polyvinyl alcohol. A preparation method of the composite film comprises the following steps: firstly, respectively dissolving the I-type collagen, the sodium alginate and the polyvinyl alcohol in different reaction kettles and regulating the pH of the I-type collagen to be within 5 to 8; then, successively adding a sodium alginate liquid and a polyvinyl alcohol liquid in proportion into an I-type collagen liquid and stirring for 4 to 10 hours; adding a defoaming agent to a mixed liquid and stirring for 20 to 60 minutes; then, pumping the mixed liquid into a storage tank and standing for defoaming; after the defoaming is checked to reach a requirement, pumping the mixed liquid into a film casting machine so as to obtain a film in a casting manner, drying and soaking the film in a cross-linking agent liquid or standing under a cross-linking condition for cross-linking for 4 to 24 hours, cleaning and drying; finally, shaping the film, packaging and irradiating, thereby obtaining the I-type collagen-sodium alginate-polyvinyl alcohol composite film. The composite film material is good in mechanical property, hydrophilcity and biocompatibility, moderate in degradation velocity and simple in preparation process. Thus, the composite film material can be widely applied to wound dressing, hemostatic materials, tissue engineering scaffold materials and the like.

The invention discloses a miniature solid or hollow silicon needle, a silicon needle array and the manufacture method, belonging to the medical service and hairdressing apparatus and micro machining technical field. The lower end of the miniature silicon needle head is column. The upper needle point of the needle head is provided with at least one arc sharp corner to form the peak. A through holeis arranged on the peak and is connected with the inverse triangle groove at the bottom. By micro-electronics craft, at the positive and the back surfaces of the (110) crystal orientation monocrystalline silicon wafer, two kinds of inverse triangle grooves are processed in batches which are formed by six silicon (111) surfaces, using the anisotropism self-stop wet corrosion. Then the silicon needle and a through hole are manufactured by the DRIE method. The through hole is connected with the back inverse triangle groove. The invention has the advantages that: the solid or hollow silicon needle array can be manufactured in batches with low cost, high productivity and firm structure; the invention has a wider potential application in the transdermal drug delivery, micro body fluid extraction and other biomedical field.

The invention belongs to the field of metal materials and particularly relates to a TiC / Ti5Si3 enhanced copper-based composite and a preparing method thereof. The preparing method includes the steps of raw material preparing, preparing of carbon elementary substance mixed powder of Ti, Si, graphite and the like, powder briquetting and sintering, preparing of the TiC / Ti5Si3 enhanced copper-based composite and other steps. By means of the TiC / Ti5Si3 enhanced copper-based composite and the preparing method thereof, carbon elementary substances such as graphite powder or carbon black or carbon nano tubes or graphene are adopted as the carbon source, and the carbon elementary substances in melt and titanium are subjected to a spontaneous reaction to synthesize TiC so as to prepare the TiC / Ti5Si3 enhanced copper-based composite. The preparing technology is simple, the cost is low, and the efficiency is high. TiC particles are distributed in Ti5Si3, interface bonding between an enhancement body and a base body is good, and particle and fiber compounding enhancement is achieved. Compactness of the prepared composite is high, electric conduction performance and heat conduction performance are good, strength, hardness and wear resistance are high, meanwhile, good plasticity and toughness are achieved, and the TiC / Ti5Si3 enhanced copper-based composite is suitable for industrial production and application.