49results about How to "No oxidation reaction" patented technology

The invention discloses a broadband wide temperature range high-power density low-loss manganese-zinc soft magnetic ferrite material. The material comprises main ingredients, an auxiliary ingredient A and an auxiliary ingredient B, wherein the main ingredients comprise the following components in percentage by weight: Fe2O3, MnO and ZnO; based on the weight of the main ingredients, the auxiliary ingredient A comprises at least three of CaCO3, Nb2O5, NiO, SnO2 and Co3O4; and the auxiliary ingredient B comprises at least three of SiO2, Y2O3, K2CO3, Al2O3, CuO, MoO and Bi2O3. The preparation method of the material sequentially comprises the following steps: primary batching, primary sanding, pre-sintering, secondary batching, secondary sanding, performing component analysis, performing spray granulation, molding and sintering. The material disclosed by the invention has low loss in a temperature range from 20 DEG C below zero to 120 DEG C under the conditions of 100-500KHz and 100-200mT, and has high magnetic conductivity and high high-temperature saturation flux density. Compared with the conventional material, the material disclosed by the invention is energy-saving and can enable a switching power module to be miniature and efficient.

The invention discloses a DBC (Direct Bonded Copper) substrate surface treatment process based on a nano-silver soldering paste connecting chip. The process solves the technology that not only the copper on the DBC substrate surface is prevented from bleeding out of a silver plating surface, but also the combination strength between the nano-silver soldering paste connecting chip and the DBC substrate is ensured. The DBC substrate surface treatment process comprises the following steps of: firstly carrying out cleaning pretreatment on the surface of a DBC substrate; then carrying out electronickelling treatment on the pretreated DBC substrate; and finally, after thorough cleaning, carrying out silverplating treatment on the surface of the electronickelled DBC substrate by using a magnetron sputtering method. The DBC substrate surface treatment process based on the nano-silver soldering paste connecting chip has the following beneficial effects: when the electronickelled DBC substrate subjected to magnetron sputtering silver is sintered at high temperature by using a nano-silver soldering paste, the metal copper on the surface of the DBC substrate does not oxidize, i.e. the metal copper does not permeate the surface of a silvering layer; after being sintered, the nano-silver soldering paste has good bonding strength with the electronickelled DBC substrate subjected to magnetron sputtering silver; and the DBC substrate surface treatment process is green and environment-friendly and has no adverse effect on the environment.

The invention belongs to the field of polymer materials, and in particular relates to a low-temperature-resistant polyolefin grafted maleic anhydride flexibilizer used for nylon and a preparation method of the flexibilizer. The flexibilizer comprises the following raw materials in parts by weight: 100 parts of a polyolefin elastomer, 0.3-1.5 parts of maleic anhydride, 2-6 parts of an ionic polymer, 1.0-2.0 parts of polypropylene powder, 0.05-0.15 part of graft polypropylene, 0.05-0.25 part of a lubricant, 0.1-0.3 part of a plasticizer, 0.05-0.2 part of an initiator, and 0.1-0.3 part of an antioxidant. According to the flexibilizer provided by the invention, the maleic anhydride is grafted through the polyolefin elastomer, the polarity of the polyolefin elastomer is enhanced, and the grafted polyolefin elastomer can be used as a flexibilizer, an interfacial modifier and a compatibilizer of the nylon; and the flexibilizer can obviously improve the compatibility of the polyolefin elastomer and a strong-polarity nylon material, and can effectively improve the low-temperature impact performance.

The invention discloses a method for producing dyed hollow filaments by recycled polyester in the field of polyester fiber production methods. The method includes: preparing a recycled material, and making the recycled material into recycled masterbatch; subjecting the recycled masterbatch to solid-phase tackifying under a vacuum state; mixing the tackified material and masterbatch, sending into a screw extruder to realize mixing and extruding, and spinning through a hollow spinneret plate to obtain hollow filaments; cooling and blowing the filaments under the protection of nitrogen; oiling, and subjecting multiple strands of filaments to interlacing treatment through an interlacing jet; winding and storing. The method can be used for recycling of various waste beverage bottles and textile offcut materials, and environmental friendliness and low energy consumption are realized.

A technical handling method of cuprum wires cross relates to the annealing process of cuprum wires cross and comprises the following steps: putting cuprum wires cross into a annealing furnace, pumping air in the furnace to form negative-pressure in the furnace, filling the furnace with carbon dioxide protective gas; performing a heating treatment of two stages under pressure, performing a gas releasing decompression processing between stages, then cooling-down slowly in the furnace for 0.3-1 hour, and opening the furnace to cool-down naturally to atmospheric temperature. Therefore, electrical soft wires cross through such annealing treatment has brightening surfaces and excellent finish, without greasy dirt or other soils; exhibits uniform flexibility and strong antioxidant ability, and can be stored for a long time.

The present invention relates to the field of machinery and particularly relates to a tea leaf enzyme deactivating and drying integrated machine. The nitrogen protected tea leaf enzyme deactivating and drying integrated machine comprises a shell body and a bracket; the bracket comprises a first column and a second column, a first fixing shaft is arranged on an upper part of the first column, a second fixing shaft is arranged on an upper part of the second column, the shell body is connected with the first fixing shaft through a first bearing, and the shell body is connected with the second fixing shaft through a second bearing; the first fixing shaft is a hollow tube, one end of the first fixing shaft communicates with an inside of the shell body, and the other end of a first fixing shaftcommunicates with a gas storage tank; and a heating device for heating the shell body is also arranged on one side of the shell body. Through a design, tea leaves are placed in the sealed shell body and during rotating and heating processes of the shell body, nitrogen continuously enters into the shell body, so that the tea leaves are protected by the nitrogen during processes of high temperature,enzyme deactivating and drying, organic substances of chlorophyll, tea polyphenols, etc. in the tea leaves do not oxidize, and quality of finished products of the tea leaves are ensured.

The invention discloses a silicon material cleaning device. A main body structure of the silicon material cleaning device is designed as a cleaning tank, a cleaning tank cover is placed at the top ofthe cleaning tank, a cleaning roller is installed in the cleaning tank, and a cleaning brush is installed in the cleaning roller. The cleaning roller is powered by a driving motor, a speed adjusting device is installed on the right side of the driving motor, a connecting bearing is installed between the speed adjusting device and the cleaning tank, and an ultrasonic generator is installed at the bottom of the cleaning tank. According to the silicon material cleaning device, impurities on the surface of silicon materials can be cleaned effectively, the reaction is stable, and almost no heat isproduced, the oxidation reaction is not produced, so that contamination to silicon materials caused by oxidation is avoided to improve the quality of the silicon materials; dilute hydrofluoric acid does not react with silicon, so that the loss rate of the silicon materials is reduced; and the acid consumption is low so as to greatly reduce the cost of cleaning the silicon materials, energy is saved effectively, broad market potentials are achieved, and market demands can be met.

The invention discloses superheated steam fixation device. The superheated steam fixation device comprises a fixation drying bin, a driving device, a supporting wheel, a discharging device, a feedingdevice, a gas guide pipe, a steam device, an exhaust device and a pipeline fan. Tea leaves continuously enter and exit from the fixation drying bin through the feeding device and the discharging device, so that continuous superheated steam fixation drying is realized. Moisture generated during fixation drying of the tea leaves is heated by the steam device to become superheated steam, the superheated steam at 60-380 DEG C is used for carrying out heat transfer fixation and heat and mass transfer drying on the tea leaves in the fixation drying bin, the heat transfer efficiency of the superheated steam and the tea leaves is enhanced, the tea leaves are free of oxidation reaction in the superheated steam fixation drying process in the fixation drying bin, the fixation and color fixation effects of the tea leaves are good, and the tea leaves are uniformly fixed and dried. During fixation of the superheated steam, the surfaces of the tea leaves are wet, the drying stress is small, and the drying defects of burnt leaves, burnt edges, broken tea, water stuffy taste and the like are avoided. The tea leaves after fixation and drying of the superheated steam are soft and tough, and the subsequent rolling process is facilitated.

The invention discloses a silicon material cleaning method. A body structure of a silicon material cleaning device is designed into a cleaning tank. A cleaning tank cover is placed on the top of the cleaning tank. A cleaning roller is arranged in the cleaning tank and internally provided with a cleaning brush. Power is provided for the cleaning roller through a drive motor. A speed adjusting device is arranged on the right side of the drive motor. A connecting bearing is arranged between the speed adjusting device and the cleaning tank. An ultrasonic generator is arranged at the bottom of thecleaning tank. The cleaning method comprises the steps that a silicon material is subjected to ultrasonic ethanol-water flushing and then is immersed through dilute alkali liquid, then, spraying is conducted through dilute acid liquid, finally, high-pressure washing is conducted, and then drying is conducted after water spinning-dry. By means of the silicon material cleaning method, impurities onthe surface of the silicon material can be effectively cleaned away, the reaction is stable, heat is basically not generated, and the oxidization reaction is not generated; and pollution to the silicon material due to oxidization is avoided, and the silicon material quality is improved; and the silicon material loss rate is reduced, and cost is saved.

The invention discloses a method for preparing a small block nickel-copper alloy based on a water washing process, which specifically includes the following steps: calculating the nickel-copper ratio according to the requirements for producing the nickel-copper alloy, then weighing the raw materials, putting them into an intermediate frequency furnace in batches, and energizing the melt , after all the materials are melted, inject the alloy solution into the ladle; move the ladle to the side of the cooling water pool, pour the alloy solution into the cooling water pool, the pouring speed is 100kg/min, and the temperature of the water in the cooling water pool is 70 ‑100℃; After all the alloy solution in the ladle is poured into the cooling water pool, it will be a small piece of nickel-copper alloy finished product when picked up. The invention is used to prepare the nickel-copper alloy of small block, the size of the block is uniform, no mold is needed in the production process, the cost is low, the production cycle of the nickel-copper alloy is shortened, and the production efficiency and product quality are improved.

The invention discloses intelligent card tin dipping equipment with a soldering tin protection function. The intelligent card tin dipping equipment comprises a tin dipping device and a card conveying mechanism, and further comprises a sealing cover, wherein the tin dipping device is arranged in the sealing cover; the card conveying mechanism penetrates through the sealing cover; and the sealing cover is filled with inert gas. The intelligent card tin dipping equipment can ensure that melted soldering tin is not oxidized in a production process; and the chip welding quality of an intelligent card is improved and the production cost is saved.

Provided are a gas protection non-oxidation quenching carburizing integrated furnace and a method. The integrated furnace comprises a heating chamber. The heating chamber is composed of an enclosed space formed through enclosure of a furnace body and a furnace door. A gas outlet pipe is arranged on the furnace body or the furnace door. The gas outlet pipe is communicated with the heating chamber. A lighting up tuyere is arranged on the gas outlet pipe. A silicon carbon rod is arranged in the heating chamber. A gas inlet pipe is arranged on the furnace body or the furnace door. The gas inlet of the gas inlet pipe is communicated with a gas outlet of an ammonia cracking device, or the gas inlet of the gas inlet pipe is communicated with a gas supply inlet of a liquefied gas supply device. The heating chamber is an enclosed space. When the furnace door is closed, external air cannot go into the heating chamber, and the air in the heating chamber is brought to the gas outlet pipe by the ammonia cracking gases or liquefied gases, and burnt at the lighting up tuyere, and therefore oxygen in the heating chamber is less and less, so when a metal workpiece is heated to a high temperature, no oxidation reaction is generated on the surface of the metal workpiece.

The invention relates to the technical field of carbonization furnaces, and especially relates to a biomass horizontal type rotary core carbonization furnace. A rotary core pushing and twisting shaft is arranged in an inner cylinder, spiral blades are arranged on the peripheral wall of the rotary core pushing and twisting shaft, the front end of the rotary core pushing and twisting shaft extends out of the inner cylinder in a suspended mode and is driven by a motor to rotate, and the front end and the rear end of the inner cylinder extend out of an outer cylinder in a suspended mode; a raw material inlet is formed in the front end of the inner cylinder, a first outlet is formed in the rear end of the inner cylinder, a heating cavity is defined between the inner cylinder and the outer cylinder, a heating medium inlet is formed in the rear end of the outer cylinder, a heating medium outlet is formed in the front end of the outer cylinder, a plurality of stirring columns are vertically arranged on the spiral blade, and a spiral flow deflector is arranged on the peripheral wall of the inner cylinder; and a plurality of rolling supporting units are arranged at the bottom end of the spiral flow deflector, and the bottom end of the spiral flow deflector and the inner wall of the outer cylinder form rolling type supporting fit in the cylinder length direction through the rolling supporting units. The carbonization furnace has the advantages of high raw material carbon yield, improved production efficiency, ensured carbon quality, long service life and the like.

The invention relates to a large grid plate for an air pressure filter, which can improve the safety class of food and rice wine taste fundamentally. The surface of a large silicone rubber grid plate forms a concavo-convex liquid-flow surface through multiple cycles of element rests; and the concavo-convex liquid-flow surface is provided with a deflector hole. The large silicone rubber grid plate has the advantages of innocuity, no odor, acid resistance, alkali resistance, high and low temperature resistance, insusceptibility to oxidation and photochemical action and long service life. In addition, the large silicone rubber grid plate not only does not exert any influence on the rice wine taste, but also really retains the original taste and flavor in a rice wine-making process and improves the safety class of the food. The large silicone rubber grid plate improves the squeezing efficiency of squeezed materials effectively to improve the discharging rate of the materials by more than 10 percent and reduces the discharging cost of the squeezed materials effectively. After being discarding as worthless material, the large silicone rubber grid plate can be recycled so as to protect environment.

The invention discloses a method for reducing peroxide value and acid value of ganoderma lucidum spore oil. The method comprises the following steps: 1) sequentially adding liquid nitrogen, purified water and liquid nitrogen into ganoderma lucidum spore powder, starch, wall-breaking enzyme, amylase and vitamin E powder, and carrying out heating in a water bath for an enzymolysis reaction for 3 hours; 2) adding NaHCO3 to adjust a pH value to 7.2, adding cultivation powder of bacillus subtilis, and carrying out stirring at a constant temperature of 38 DEG C for 1 hour; 3) carrying out low-temperature filter pressing, adding liquid nitrogen into an obtained filter cake, freezing the filter cake into blocks, carrying out vacuum drying, adsorbing oily substances on the upper layer of the filtrate, freezing the oily substances into blocks by liquid nitrogen, and carrying out vacuum drying; and 4) grinding a cake formed in the step 3) into powder, carrying out supercritical CO2 extraction to obtain spore oil, and then preparing a spore oil capsule. According to the method in the invention, wall breaking via lyase and supercritical extraction are combined, free oxygen in an enzymolysis system is removed through liquid nitrogen twice, then bacillus subtilis capable of consuming dissolved oxygen is added, and supercritical extraction is performed finally, so the spore oil in the whole production process is free of oxidation reaction and not prone to acidification and decay.

The invention provides a nano-powder/polyether-ether-ketone composite material and a preparation method thereof, and the nano-powder/polyether-ether-ketone composite material comprises the following components: polyether-ether-ketone and magnetic nano-powder, and the magnetic nano powder is one or two or more of nano ferroferric oxide, nano Fe powder, nano Ni powder, nano Co powder, and alloy nano powder (such as FeNi, FeCo and the like) or oxides. According to the preparation method, firstly, a magnetic nano-powder/diphenyl sulfone composite material is prepared, and when PEEK powder is generated through a condensation polymerization reaction, the PEEK powder grows by taking nano-powder as a crystal nucleus, so that the nano-powder can be prevented from being agglomerated; diphenyl sulfone is different from PEEK, can be dissolved in an organic solvent, is low in melting temperature and viscosity, and is easy for preparing a nano composite material with uniformly dispersed nano particles; and in the PEEK synthesis reaction process, the nano powder is always in diphenyl sulfone, agglomeration of the powder can be reduced as much as possible, and due to nitrogen protection, oxidation reaction cannot occur.

The invention discloses a polymer ceramic material for a pouring mold and a manufacturing method thereof. The polymer ceramic material comprises the following components in percentage by weight: 60-70% of a plastic material, 10-15% of ceramic powder, 5-10% of glass fiber, 1-3% of metal fiber and 1-2% of a plasticizer. A mold prepared from the polymer ceramic material is low in price, convenient toprocess, beneficial to molding, high in surface smoothness, long in service life, not prone to deformation, beneficial to accurate casting and capable of manufacturing large pressed parts. Compared with a metal material, the weight and the specific gravity are low, the material price and the overall weight are greatly reduced, water absorption is avoided, deformation of the mold is reduced, the surface is subjected to crystal plating treatment, the smoothness is greatly superior to that of the metal material, an oxidation reaction is avoided after the surface is made of a non-metal material,and the service life of the surface smoothness is prolonged.