88 results about "Nitrogen molecule" patented technology

The invention relates to a preparation method and use of a carbon molecular sieve. The preparation method comprises the following steps: preparing a conventional carbon molecular sieve; and expanding the pores in the conventional carbon molecular sieve by using a secondary activation technique and modifying the conventional carbon molecular sieve by adjusting the pores. The new carbon molecular sieve is prepared by using coal, coconut shell or phenolic resin, and the like as raw materials, by the conventional production steps of crushing, forming, carbonizing, steam activating, hydrocarbon settling and shrinking and the like and by secondary activation with KOH or CO2 as an activator. The activation temperature is between 550 and 850 DEG C; and the ignition loss rate of the product is kept be between 0.1 and 30 percent. In aspect of use, the carbon molecular sieve can be used for absorbing nitrogen molecules and can also be used for absorbing and separating methane and nitrogen in seam gas under a variable pressure while achieving an adsorption dynamic separation effect and allowing high-concentration methane gas to be collected at the exit of an adsorption tower directly; and thus, the methane in the seam gas can be used efficiently.

Coatings, devices and methods are provided, wherein the contacting surface of a medical device with at least one contacting surface for contacting a bodily fluid or tissue, wherein long-lasting and durable bioactive agents or functional groups are deposited on the contacting surface through a unique two-step plasma coating process with deposition of a thin layer of plasma coating using a silicon-containing monomer in the first step and plasma surface modification using a mixture of nitrogen-containing molecules and oxygen-containing molecules in the second step. The two-step plasma coating process enables the implantable medical device to prevent both restenosis and thrombosis under clinical conditions. The invention also relates to surface treatment of metallic and polymeric biomaterials used for making of medical devices with significantly improved clinical performance and durability.

The invention aims to provide an atmospheric pressure induced air dielectric barrier discharge (DBD) low temperature plasma generation device. The device comprises a discharge unit provided with a DBD electrode structure and a narrow slit cavity body connected to the front end of the discharge unit, wherein the discharge unit comprises two oppositely-arranged plate electrodes; an insulation medium plate used for limiting a discharge current between the two plate electrodes is fixedly arranged on the plane of the inner side of a high voltage electrode; a sample to be processed, which is plate-shaped, is movably mounted on the plane of the inner side of a grounding electrode in a manner of being parallel and opposite to the insulation medium plate; the narrow slit cavity body is provided with a gas inlet port used for connecting induced gas into the narrow slit cavity body, and a narrow-slit-shaped gas outlet port; and the gas outlet port is embedded between the insulation medium plate and the sample to be processed. The plasma generation device provided by the invention can produce evenly-dispersed plasma; and the plasma is rich in active species such as metastable-state nitrogen molecules, hydroxyl radicals and oxygen atoms, and can be used for conducting material surface modification, sterilization, disinfection, and the like.

The invention discloses a growth device and a growth method for preparing high-purity semi-insulating carbonized silicon single crystals efficiently. The growth method is implemented by the carbonizedsilicon single crystal growth device with a structure of an inert gas graphite flow guide tube and a graphite current-limiting cover. Inertia gases generate forced convection under the action of thestructure, and a forced convection layer is formed on the outer wall of a graphite crucible. When speed and flow of the gas convection are high, influences of diffusion on concentration distribution can be inhibited. In the method, directional movement of the forced convection layer can prevent nitrogen molecules outside the graphite crucible from dispersing into the graphite crucible, so that theproblem that adsorption nitrogen serves as a pollution source in a heat insulating system is solved. According to the method, an inertia-gas atmosphere isolation room system is not needed, and a long-term nitrogen removal process based on furnace vacuumizing is also not needed. The growth device and the growth method have the advantages of high efficiency and equipment simplicity, and can be widely applied to multiple carbonized silicon single crystal furnace systems in the field.

Disclosed are an apparatus for manufacturing GaN substrate and a manufacturing method thereof enabling to prevent micro-cracks or bending of a GaN substrate by separating a substrate and a GaN layer from each other after growing the GaN layer on the substrate in the same chamber. The present invention includes a chamber for loading a substrate therein, a heating means heating the chamber, a Ga boat installed inside the chamber to receive a Ga molecule producing material, an injection pipe injecting a nitrogen molecule producing gas in the chamber, the nitrogen molecule producing gas reacting chemically on the Ga molecule producing material to form a GaN layer on the substrate, and a transparent window at a circumference of the chamber to apply a laser beam to the substrate.

The invention discloses a method for preparing thermoplastic elastomer foamed beads. According to the method, carbon dioxide and nitrogen mixed gas can be retained inside foamed bead bubbles, so that volume shrinkage of the foamed bead bubbles in the air exchange process is inhibited, and large expansion ratio is maintained. The method includes the steps: dipping thermoplastic elastomer beads in high-pressure nitrogen atmosphere at normal temperature; placing the thermoplastic elastomer beads sufficiently absorbing nitrogen in carbon dioxide in a super-critical state, performing swelling diffusion and inducing the thermoplastic elastomer beads dissolving the nitrogen and the carbon dioxide to expand in a foaming manner to prepare the thermoplastic elastomer foamed beads. The nitrogen and carbon dioxide mixed gas is retained inside the thermoplastic elastomer foamed beads, a bubble structure is supported by nitrogen molecules in the bubbles in the process of gas exchange with external air in a natural environment, and high product foaming ratio is maintained.

A conductive pattern formation ink which can be stably ejected in the form of liquid droplets and form a conductive pattern having high reliability, a conductive pattern having high reliability, and a wiring substrate provided with the conductive pattern and having high reliability are provided. The conductive pattern formation ink is used for forming a conductive pattern by ejecting the ink in the form of liquid droplets on a surface of a ceramic molded body using a liquid droplet ejecting method, the ceramic molded body being made of a material containing ceramic particles and a binder. The ink contains a water-based dispersion medium, and metal particles dispersed in the water-based dispersion medium, wherein the water-based dispersion medium contains oxygen molecules and nitrogen molecules, and wherein when the water-based dispersion medium is analyzed using a gas chromatography method, a total amount of the oxygen and nitrogen molecules contained in the water-based dispersion medium is 12 ppm or less.

Method and system on board an aircraft for the production of an oxygen-enriched gas stream from an oxygen/nitrogen gas mixture, particularly air, comprising at least one adsorber containing at least one adsorbent for adsorbing at least some of the nitrogen molecules contained in the oxygen/nitrogen feed mixture, characterized in that the adsorbent comprises a faujasite-type zeolite, having a Si/Al ratio of 1 to 1.50, exchanged to at least 80% with lithium cations. Aircraft equipped with such a system, in particular an airliner, especially an airliner of the long-range, large-capacity type.

Electrochemical device using thin micro-porous metal sheets. The porous metal sheet may have a thickness less than 200 μm, provides three-dimensional networked pore structures of pore sizes in the range of 2.0 nm to 5.0 μm, and is electrically conductive. The micro-porous metal sheet is used for positively and/or negatively-charged electrodes by providing large specific contact surface area of reactants/electron. Nano-sized catalyst or features can be added inside pores of the porous metal sheet of pore sizes at sub- and micrometer scale to enhance the reaction activity and capacity. Micro-porous ceramic materials may be coated on the porous metal sheet at a thickness of less than 40 μm to enhance the functionality of the porous metal sheet. The ceramic coating layer of non-electrical conductivity can function as a membrane separator. The electrochemical device may be used for decomposing molecules and for synthesis of molecules such as synthesis of ammonia from water and nitrogen molecules.

The invention provides a tandem electric field force aircraft propelling device which can be applied to various occasions inside and outside the atmosphere. The propelling device comprises positive and negative ion generator array layer frames, positive and negative ion generators, shells, positive and negative screen grids, positive and negative neutral layers, positive and negative accelerating grids and insulating fixing bolts. Air is ionized continuously through alternating current and the positive and negative ion generators to generate a large number of positive and negative ions, and the ions are immediately captured by oxygen molecules, nitrogen molecules, carbon dioxide molecules and the like in the air, so that weak positive ion wind and negative ion wind are generated. After multi-stage ionization and multi-stage acceleration, ion wind with a high speed and large flux is output from an accelerator; accordingly, the propelling device can provide large thrust force, and has the advantages of being stable in operation, free of noise, large in specific impulse and thrust force, wide in application occasion and the like.

The invention discloses a free-cutting steel part and a manufacturing method thereof. The free-cutting steel part comprises a matrix and a reinforcing layer, wherein the matrix contains more than one free-cutting elements, and the reinforcing layer contains carbon and nitrogen elements; and the method disclosed by the invention is implemented mainly by using a mode of carrying out carburization firstly and then carrying out carbonitriding, and optimized parameters and processes are adopted. The free-cutting steel part and manufacturing method thereof disclosed by the invention have the beneficial effects that the defect that nitrogen atoms are changed into nitrogen molecules so as to form holes and black tissues as nitrides are decomposed and removed caused by increment of the carbon concentration can be avoided, and the surface performance is good.

An air filter for an internal combustion engine having a rigid type ceramic filter element made by foaming oxygen-rich ceramic powder for creating a plurality of pass-through holes. In this way, the incoming air obtains a thorough contact with the oxygen-rich powder. Meanwhile, the material of the oxygen-rich ceramic releases negative ions to activate the air entering into the internal combustion engine. Moreover, nano-sized platinum black is coated to the surface of the pass-through holes of the ceramic filter element. So, the incoming air passing through the pass-through holes of the ceramic filter element is catalyzed in chemical reactions to divide the water molecule cluster into smaller particles. Meanwhile, the freedom of water molecule is increased to permit an instant decomposition of oxygen and nitrogen molecules, a complete combination with the fuel injected into the internal combustion engine, and a thorough mixing and a better combustion efficiency.

The invention discloses a method for regenerating and extracting waste mineral oil by filling nitrogen. The method comprises the following steps of: (1) delivering waste mineral oil into a distillation reactor, distilling at reduced pressure after reducing the pressure to -0.1MPa to -0.02Mpa, and dehydrating in vacuum; (2) filling nitrogen into different parts of the distillation reactor, removing other residual miscellaneous gases in the space of the distillation reactor, stirring the dehydrated waste mineral oil, and forming a negative-pressure zone at the inlet of a rectification tower; and (3) circularly heating the stirred waste mineral oil to 120-320 DEG C according to different thermophases, separating out oil steam with different components, mixing the oil steam with nitrogen molecules, transporting quickly, and extracting. The method effectively solves the problems of low regeneration yield of the waste mineral oil, low extraction efficiency and environment pollution.

A new approach for igniting an air-fuel mixture in a turbine or other engine is disclosed. Resonance-enhanced multiphoton ionization (REMPI) is used to generate volume ionization within an air-fuel flow and induce an ignition arc. The output of a relatively low energy single pulsed ultraviolet laser is aimed across an electric field inside a volume of air to create a pre-ionized channel so that a smaller voltage electric field is sufficient to create an electrical arc that follows the pre-ionized channel and will ignite an air-fuel mixture. Because the arc follows the pre-ionized channel, it can be directed to an optimal location inside an ignition volume for igniting the air-fuel mixture. A specific example embodiment is described using a 287.5 nm wavelength pulsed ultraviolet laser to excite ground state oxygen molecules to a specific excited state having a coincident term energy with a specific nitrogen molecule excited state.

The invention discloses a preparation method of a carbon defect type carbon nitride material for photocatalytic nitrogen fixation. The mesoporous carbon nitride which is loose in structure and has more surface carbon defects is obtained by taking urea as a precursor through a high-temperature stripping method. Through control of an atomic scale structure and construction of surface defects, the photocatalytic activity of the prepared carbon defect type carbon nitride on ammonia conversion is greatly improved compared with that of bulk phase g-C3N4. By utilizing a thin layer structure, more surface carbon vacancies and a mesoporous structure, the light absorption capacity of a visible light region can be enhanced, and the photo-generated charge separation efficiency can be improved. What is worthy of noting is that the engineering carbon vacancies greatly promote adsorption and activation of nitrogen molecules, the nitrogen fixation activity of the defect ultrathin g-C3N4-V (carbon defect type carbon nitride) material is improved, and the preparation method is simple, easy to implement, rapid and convenient and has universality.

The invention discloses a method for measuring nitrogen in a carbon series heating agent, and belongs to the technical field of nitrogen element measuring methods. The method for measuring nitrogen inthe carbon series heating agent is used for measuring the content of a nitrogen element in the carbon series heating agent. According to the technical scheme, the method includes the steps of samplepreparation, blank experiment, instrument calibration and content determination. First, a sample to be tested is loaded into a tin capsule and compacted, then placed in a graphite crucible and meltedin a helium atmosphere, nitrogen is released in a nitrogen molecule mode, quantitative detection is performed by a thermal conductivity detector, and finally a computer directly displays in the form of percentage nitrogen content. The method for measuring nitrogen in the carbon series heating agent is the first to determine the content of the nitrogen element in the carbon series heating agent inthe industrial production, in the absence of corresponding standard, the determination of the nitrogen element in the carbon series heating agent by an inert gas fusion-thermal conductivity method isrealized, and the blank of the determination of the nitrogen element in the carbon series heating agent by the inert gas fusion-thermal conductivity method is filled. The method for measuring nitrogenin the carbon series heating agent has the remarkable advantages of being simple and fast, low in price, high in sensitivity, environmentally friendly and suitable for industrial analysis, and provides reliable data support for production.

The invention discloses a hollow glass desiccant comprising the following raw materials in parts by weight: 100 parts of sepiolite, 1-4 parts of hydrochloric acid, 2-15 parts of aluminum sulfate, 0.1-0.5 part of cation surfactants and 1-5 parts of sodium hexametaphosphate. The grain size of a finished product is 0.5-5 mm, the stacking density is 0.65-0.8 g/ml, the temperature rise is not less than 30 DEG C, the static water adsorbance is not less than 20%, the static nitrogen adsorbance is not greater than 0.2%, the abrasion rate is not greater than 0.2%, and the water content is not greater than 2%. The performance of the product in the invention is obviously higher than that of the hollow glass desiccant in the prior art, the product has higher adsorption capacity on water and also effectively reduces the adsorption capacity on oxygen molecules and nitrogen molecules, and the manufacturing cost is greatly reduced. The invention also discloses a production method of the hollow glass desiccant.

The invention relates to the field of welding, in particular to a welding method based on quartz tuning fork crystal three-temperature-area nitrogen blowing. The welding method is characterized in that a nitrogen making machine is connected with one end of a drying machine through a pipeline, and the other end of the drying machine is respectively connected with a flow-limiting valve A, a flow-limiting valve B and a flow-limiting valve C through pipelines; the flow-limiting valve A is connected with a drying temperature area through a filter A, a heating wire A and a drying temperature area pipeline, and the other end of the heating wire A is connected with an adjustable converter A; the flow-limiting valve B is connected with a preheating temperature area through a filter B, a heating wire B and a preheating temperature area pipeline, and the other end of the heating wire B is connected with an adjustable converter B; the flow-limiting valve C is connected with a high temperature area through a filter C, a heating wire C and a high temperature pipeline, and the other end of the heating wire C is connected with an adjustable converter C; the drying temperature area, the preheating temperature area and the high temperature are provided with product track grooves. By the adoption of the technical scheme, due to the fact that chemical reactions among nitrogen molecules, tuning fork pieces and tuning fork base metal components do not easily occur at a high temperature, an oxidation process and dust pollution do not exist, and quality of products can be stable.

The invention discloses an air intake control method of a combustion chamber. The air intake control method is characterized in that air is treated before entering the combustion chamber of an engineby means of the physical separation means, before air enters the engine, enrichment of combustion unfavorable components represented by nitrogen molecules and combustion favorable components represented by oxygen molecules are completed, and the two parts of components enter the combustion chamber of the engine in respective enriched states to be combusted. The air intake control method has the advantages that front-end treatment can be carried out on intake air of the combustion chamber, the air intake control method is beneficial to sufficient combustion of the combustion chamber, the effects of energy saving and emission reduction are generated, emission pollution is reduced, and the emission standard is improved.