749results about How to "Good process repeatability" patented technology

By using the soluble salt of transition metalz Zn, Cd, Pb, Mn, Co, Ni, Cu, Ag, Sb and Bi, selenious acid or its solutl salt, or antimonous acid or its soluble salt as raw material, and hydrazine hydrate, sodium borohydride, potassium borohydride, hydroxylamine or hydrazine sulfate as reductant, and through hydrothermal reduction reaction at 100-200 deg.c in a sealed container for 2 hr to 5 days, selenides or tellurides of the said metals as semiconductor material may be synthesized. Unlike available synthesis process, which needs high temperature, toxic feedstock and complex technological course, the present invention has the advantages of low-cost material, simple apparatus, easy control, good technological reproducibility, stable product quality, etc.

The invention relates to a high-temperature press sensor of silicon-silicon-bonded-based silicon on an insulator (SOI) and a producing method, belonging to the field of sensor chip, characterized in that a shallow slot and a gas vent on a support silicon substrate are all formed through anisotropic etch; suitable depth of the shallow slot can be obtained by controlling etching time so as to accomplish over-voltage protection for the device; the support silicon substrate is bonded with an inverted SOI chip; a piezoresistor is produced on the top layer of silicon after reducing and polishing the back of the SOI chip. The device can operate normally at high temperature using SOI buried oxide layer for isolation of sensitive component and elastic component.

The present invention discloses a nucleocapsid energizing agent for propelling agent and a method for preparing same, the energizing agent is a nucleocapsid structure energizing agent that carbon is encapsulated on a metallic oxide surfaced. The preparing method includes steps as follows: selecting one or some raw materials: address sugar, diose or soluble polysaccharide to mix according with random weight rate for confecting water solution 50-1500g/L, adding the surfactant or dispersant into the water solution, then adding the metallic oxide powder, the metallic oxide weight is 1-60% of the raw material total weight, the surfactants or dispersants weight is 0-4.5% of the metallic oxide weight, ultrasounding or stirring to distribute evenly, heating in 100-260 DEG C during 1-72 hours; reducing the product temperature to a room temperature, washing, centrifuging, removing the water-soluble impurity again and again, then vacuum drying for obtaining the nucleocapsid energizing agent. The nucleocapsid energizing agent has better compatibility with other component of the propelling agent, and has simple preparing technique, low cost, green process and is easy to mass production.

The invention provides high-entropy alloy powder for 3D (three-dimensional) printing and a method for preparing a high-entropy alloy coating by using the high-entropy alloy powder, and belongs to the technical field of coating preparation. By the high-entropy alloy powder, the wear resistance of the existing powder materials for 3D printing is improved. The high-entropy alloy powder is prepared by using the following ingredients in atomic percentage by weight: 16%-25% of Ni, 16%-25% of Co, 16%-25% of Cr, 16%-25% of Ti and 16%-25% of V. The preparation method comprises the following steps of (1) performing ball-mill mixing on raw materials to obtain mixed powder; (2) grinding and cleaning a matrix; and (3) placing the mixed powder in a powder feeder of 3D printing equipment and sintering the mixed powder on the surface of the matrix to form the high-entropy alloy coating by using selective laser. The NiCoCrTiV coating is prepared by selective laser sintering and has the advantages of high hardness, wear resistance, corrosion resistance and the like. The high-entropy alloy powder for 3D printing and the method for preparing the high-entropy alloy coating by using the high-entropy alloy powder can be widely used in the field of 3D printing.

The invention discloses a water and oil repellency surface microstructure which comprises a substrate and a T type micro-nanometer structure etched on the substrate, wherein the T type micro-nanometer structure comprises a vertical part and a transverse part which is arranged at the top end of the vertical part. A manufacturing technology of a water and oil repellency surface comprises the steps of substrate cleaning, mask pattern transfer, XeF2 gaseous phase etching process or DRIE (Deep Reactive Ion Etching) etching process, chemical vapor deposition or perfluorination silane monomer self-assembly, thereby the water and oil repellency surface microstructure with high mechanical stability, good technology repeatability and controlled geometric structure is obtained.

The invention discloses a realization method for a novel enhancement type AlGaN/GaN HEMT device, relating to the microelectronic technical field. The realization method has low cost, simple technique, good repeatability, high reliability and small damage on materials. The enhancement type HEMT device with high threshold voltage and nano-sized effective channel length can be obtained. The invention adopts the method of etching a table top after growth of an AlN nucleating layer and a GaN epitaxial layer and before growth of a secondary GaN epitaxial layer and an AlGaN layer to make heterojunction materials on the side face of the table top grow along the nonpolarized direction, thereby the air density of two-dimensional electrons in the heterojunction materials on the side face of the table top is greatly reduced. A grid electrode of the device is produced on the side face of the table top; under the condition of no additional voltage on the grid electrode, a conductive channel can not be switched on or weakly switched on; under the condition of certain additional positive bias on the grid electrode, the conductive channel is switched on. The invention can be used in a high-temperature high-frequency high-power situation, a high-power switch and a digital circuit.

The invention discloses a molybdenum disulfide/graphene (MoS2/rGo) lithium ion battery negative electrode material and a preparation method of the material. The MoS2/rGo composite material is prepared by a hydrothermal method, and the prepared half-battery is tested to be high in specific capacity and stable in circulation performance. The method is simple and reliable, good in process repeatability and high in operability. The preparation method comprises the following steps of (1) taking proper amount of sodium molybdate, thiourea and graphene oxide as raw materials, (2) preparing a sample by the hydrothermal method, and (3) filtering, washing and carrying out vacuum drying to obtain the needed product.

The invention relates to a pressure sensor chip based on silicon direction bonding and silicon on insulator and a manufacturing method thereof, and belongs to the field of sensor chips. The invention is characterized in that a shallow slot and a gas port on a supporting silicon wafer are formed through anisotropy corrosion, and appropriate shallow slot depth obtained by controlling the corrosion time can realize over pressure protection of parts. A silicon direct bonding technology bonds the supporting wafer and a reversed SOI wafer, realizes a beam-membrane structure on the SOI after lapping and polishing to improve the sensitivity and linearity of the parts; manufactures force sensing resistance elements on the processed beam; adopts the oxidation buried layer of the SOI to solve insulation and isolation of the sensing elements and elastic elements; and improves the long-termed reliability and adaptability under high temperature of the parts. The SOP high-sensitivity pressure sensor chip based on the bonding technology has the advantages of controllable process, excellent repeatability and high finished product rate.

The invention discloses a high-speed centrifugal spinning device for producing nanofiber yarn. The high-speed centrifugal spinning device is characterized by comprising a hollow rotating centrifugal column, a rotating cylinder collector, a roller, a winding unit and a transmission gear; a plurality of spray nozzles are arranged in the outer wall of the rotating centrifugal column, and the spray nozzles are communicated with a central cavity of the rotating centrifugal column through radial channels in the rotating centrifugal column; the rotating cylinder collector is located on the outer periphery of the rotating centrifugal column; the roller is located on the upper side of the rotating cylinder collector; the winding unit is located at the rear end of the roller, and the transmission gear drives the winding unit to rotate. The invention further discloses a production method of the nanofiber yarn. According to the advantages of the high-speed centrifugal spinning device in producing the nanofiber yarn, and spinning of the collector is combined technically, the nanofiber yarn which is controllable and highly oriented is obtained; the yield is greatly increased as compared with that of the nanofiber yarn obtained by other production methods, spinning quality is greatly improved, mechanical property of the nanofiber yarn is enhanced, machining reproducibility is good, and good industrial production prospect is achieved.

The invention discloses a nitrogen fertilizer stabilizer composition. The nitrogen fertilizer stabilizer composition comprises the following components in part by weight: 1-60 parts of nitrapyrin, 1-15 parts of wall material, 2-10 parts of emulsifier, 0.05-0.3 parts of viscosity regulator, 2-10 parts of dispersing agent and 0.1-100 parts of water. The invention further provides a preparation method of the nitrogen fertilizer stabilizer composition. The preparation method of the nitrogen fertilizer stabilizer composition comprises the following steps of: heating and melting active components, adding the macromolecular wall material, and stirring uniformly; adding a mother liquid containing the active components and the wall material into an emulsifier-containing water solution under a shearing condition, and emulsifying into an oil-in-water state; and controlling grain size as required, wherein the nitrogen fertilizer stabilizer composition can be in a liquid or solid state; and liquid drops containing the active components react with water molecules to form the macromolecular wall material. Through addition of a nitrapyrin product, the nitrogen fertilizer stabilizer composition can improve the using efficiency of an ordinary nitrogen fertilizer by decreasing nitrogen leaching and denitrification, is good in compatibility with a variety of fertilizers, pesticides, weedicides and bactericides, and can be mixed therewith for application.

The invention provides a method for quickly manufacturing a titanium alloy artificial biological joint. A three-dimensional model of an affected part joint in the body of a patient is obtained through CT scanning, and the model is amplified in a corresponding proportion according to a contraction ratio; then, an elastic cavity negative mould of the joint is quickly manufactured through 3D printing, titanium alloy powder is evenly and loosely contained in the cavity negative mould in the argon environment and sealed, and a porous titanium alloy joint blank is manufactured through high-pressure cold isostatic pressing; titanium alloy slurry in different particle sizes and even in the nano scale is sprayed to the surface of the blank to build a porosity gradient surface layer; and then, the joint blank is biologically modified through biological agent slurry, the blank is subjected to vacuum drying, degreasing and sintering after surface treatment, and the porous titanium alloy artificial biological joint is obtained. According to personal data, the appearance of the joint is customized, and the joint is good in biological adaptation. Through porosity gradient structural design and biological modification, the joint is good in biocompatibility. Through an oxygen control means, the joint is small in impurity content and high in performance. The production period is short, process stability is high, repeatability is good, and cost is low.

The invention discloses a method for preparing Ni-Mn-Ga ferromagnetic shape memory alloy continuous fibers by adopting a spinning method, and relates to a preparation method of Ni-Mn-Ga ferromagnetic shape memory alloy continuous fibers. The method solves the problems that the conventional glass coating method for preparing the Ni-Mn-Ga fibers has low production efficiency and poor process repeatability and bare fibers cannot be directly obtained. The method comprises the following steps of: putting Ni-Mn-Ga alloy ingots into a crucible of a device for preparing metallic amorphous wires, charging argon protection gas into a cavity, starting a metallic roller, heating the crucible, controlling the crucible to move to the metal roller after the alloy is smelted, and spinning the metal into the fibers when the high-speed rotating metal roller is in contact with the molten metal. The length of the prepared fibers reaches 1 to 10 centimeters, the diameter of the fibers is 30 to 80 microns, and the size of the fibers is uniform. The components of the fibers are uniform and consistent with the adopted alloy ingot components. The preparation method has high production efficiency and good process repeatability, the bare fibers can be directly obtained, and good surface state is kept.

The present invention discloses microwave electron cyclotron resonance plasma body chemical vapor deposition equipment, which comprises a microwave power source and a transmission system 101, a microwave resonance cavity 102, a coating chamber and a specimen stage system 103, a vacuum system 104, a gas circuit system 105, an automatic sheet transmission system 106, and a controlling system 107, wherein, magnetic field devices 306 which are lined at equal intervals are arranged in the microwave resonance cavity; the specimen stage system is arranged inside the coating chamber; the microwave resonance cavity, the vacuum system, and the automatic sheet transmission system are respectively connected with a coating chamber 809, the microwave power source and the transmission system are connected with the microwave resonance cavity; a controlling software is solidified in the host computer of the controlling system; the working states of the microwave power source and the transmission system, the coating chamber and the specimen stage system, the vacuum system, and the gas circuit system are respectively controlled through interfaces, and thus the deposition technological process of a film is completed. The present invention has the advantages that the big area uniformity is good, the deposition rate is high, the automaticity and the production efficiency are high, the reliability is good, the power loss is small, and the stability and the repeatability are good.