226results about How to "Oxidation resistant" patented technology

The invention relates to an ionization device, in particular to a ring dielectric barrier discharge ionization device, which comprises an insulating medium cavity, discharge electrodes, a repeller electrode, an insulating medium and a power supply, wherein one end of the insulating medium cavity is open, and the other end of the insulating medium cavity is closed; a gas inlet is formed in a sidewall close to the closed end of the insulating medium cavity; the discharge electrodes are ring electrodes which form a group, closely surround the periphery of the middle part of the insulating medium cavity, and are clad by the insulating medium; the repeller electrode is a circular metal plate, and is arranged in the closed end of the insulating medium cavity and positioned above the discharge electrodes; and the power supply supplies power to the discharge electrodes. The ring dielectric barrier discharge ionization device has the characteristics of discharge stability, no electrode pollution, oxidation resistance, low power consumption, long service life, wide working air pressure range and the like, and can be widely applied in the fields of mass spectrometric ionization sources, plasma treatment, material preparation and the like.

The invention discloses a hard alloy with a surface-layer binding-phase-rich gradient structure and a preparation method thereof. The hard alloy with the surface-layer binding-phase-rich gradient structure takes Ni3Al, Ru, Re and B strengthened metal as a binding phase, takes WC and cubic carbides such as TaC, NbC, TiC and TiCxNy or solid solutions thereof as a hard phase, wherein the cubic carbides account for 3-12% (in mass fraction) of the hard alloy, and TiCxNy content is 0.5-2.0%; and the binding phase accounts for 4.5-12.5% (in mass fraction) of the hard alloy, and the rest is WC. The preparation method comprises wet-grinding, drying and pelletizing, mould-pressing and forming as well as sintering. The hard alloy with the surface-layer binding-phase-rich gradient structure has excellent toughness, wear resistance and oxidization resistance, and is suitable for processing metal materials such as cast iron, alloy steel, stainless steel and high-temperature alloy.

The invention relates to a metal homogenizing melting furnace. The metal homogenizing melting furnace comprises a furnace body and a support used to fix the furnace body, wherein the furnace body comprises a furnace shell, a furnace lining, a heating element and a crucible, which are sequentially arranged from outside to inside, the heating element is arranged around the outer surface of the crucible, the crucible is provided with a furnace cover, a stirrer is arranged on the furnace cover, and a stirring shaft of the stirrer is stretched into the crucible, and stirs molten liquid in the crucible through stirring impellers arranged at the bottom of the stirring shaft. The metal homogenizing melting furnace stirs molten metal through the stirrer, uniforms constituents of the molten metal obtained after melting metal, and greatly improves product quality.

The invention relates to a preparation method and application of a zinc cobaltate/nickel oxide core-shell nanowire array. The method comprises the steps of mixing soluble cobalt salt, soluble zinc salt, ammonium fluoride, urea and water to obtain a uniform solution; after that, feeding the uniform solution into a reaction kettle, putting a clean substrate into the solution in the reaction kettle, and carrying out calcination to obtain the substrate on which a zinc cobaltate nanowire array grows; and mixing nickel sulfate, potassium peroxydisulfate and ammonia water, putting the substrate on which the zinc cobaltate nanowire array grows into the mixed liquid, and carrying out calcination to obtain the zinc cobaltate/nickel oxide core-shell nanowire array. The method is low in manufacturing cost, effective in implementation, feasible and applicable to industrialization; the zinc cobaltate/nickel oxide core-shell nanowire array obtained by the method has the advantages of being high in discharge capacity, rate capability, cycle performance, and the like when being used for preparing a negative electrode of a lithium ion battery.

The invention discloses copper alloy electroconduction slurry. The problem that copper electroconduction slurry in the prior art is prone to oxidation and then copper silicon compounds are easily generated is solved. The copper alloy electroconduction slurry comprises the following components, by weight, 50-90 parts of conductive powder containing copper alloy, 1-10 parts of glass powder and 10-40 parts of organic carriers. The copper alloy electroconduction slurry has the advantages that low electrical resistivity of pure copper powder electroconduction slurry is maintained, and the copper alloy electroconduction slurry has oxidative resistance, copper silicon compounds are not easily generated, and the copper alloy electroconduction slurry is suitable for the fields of solar cells, LEDs, thick-film integrated circuits, integrated electronic elements and the like. A preparation method of the copper alloy electroconduction slurry includes the following steps of preparing the organic carriers, preparing the glass powder and preparing the slurry. The preparation method is simple in step, high in operability, low in cost and suitable for industrial production.

The invention relates to a perovskite catalyst used for the autothermal reforming of ethanol for producing hydrogen and a preparation method thereof. Aiming at the problems of structural change, oxidation and sintering of active ingredients and deactivation of the conventional catalyst during the autothermal reforming of the ethanol, the invention provides a novel catalyst with sintering resistance, carbon deposit resistance, oxidation resistance and high activity. The chemical formula of the catalyst is LaaSrbNicXdO3, wherein X is one of Fe, Mn and Cr, a is 0.7 to 1.0, b is 0 to 0.3, c is 0.7 to 0.95 and d is 0.05 to 0.3. The nickel-based catalyst with an ABO3 perovskite structure is prepared by a glycine complexation method, lanthanum is partially substituted by strontium at a position A and nickel is partially substituted by an auxiliary agent at a position B, so oxygen defects and lattice structure defects on the surface of the perovskite catalyst are increased; meanwhile, the auxiliary agent, namely iron, magnesium or chromium is introduced, so the acidity of the catalyst is inhibited, the reducibility and stability of the active ingredients of the catalyst are improved, and the yield of the hydrogen is obviously improved and remains stable.

The invention relates to a layered perovskite catalyst for hydrogen generation from acetic acid autothermal reforming and a preparation method. A novel catalyst which is sintering resistant, carbon deposition resistant, antioxidant and high in activity is provided for the problem of catalyst deactivation due to sintering, oxidation and carbon deposition of an existing catalyst in the acetic acid autothermal reforming process. A nickel-based catalyst with an A2BO4 layered perovskite structure is prepared by employing a sol-gel method; and the chemical component is La<2-x>Ca<x>NiO<4>, wherein x is equal to 0-1.5. An oxygen defect and a lattice structure defect of the surface of the perovskite catalyst are increased through replacing lanthanum with a calcium part, and the reducibility, the heat stability and the oxidation resistance of the active component nickel are improved, so that the activity and the stability of the catalyst are improved.

The invention provides an intelligent lock. The intelligent lock comprises an integrated type communication module, a voice processing module, a main control module, a power management module, a stepping-motor microcomputer control module, a stepping motor, a mechanical lock and a third-party interface, wherein a universal integrated circuit chip is adopted for the integrated type communication module which is welded on a carrier of the integrated communication module; and the volume of the universal integrated circuit chip accounts for only one fourth that of the SIM/USIM/ISIM (Subscriber Identity Module/Universal Subscriber Identity Module /Integrated Protocol Multimedia Service Identity Module) card of the traditional plastic card body, so that the production cost can be effectively reduced and industrial production is facilitated. The intelligent lock provided by the invention also can realize interaction between a mobile phone and the intelligent lock, so that the security is greatly improved; in addition, the built-in integrated communication module of the intelligent lock also has the effects of vibration resistance, wear resistance, oxidation resistance and global communication uniqueness, and can work normally under the extreme environments of high/low temperature, humidity and the like, so that the security and the stability of the intelligent lock are greatly improved.

The invention discloses an X-ETFE (crosslinked ethylene-tetrafluoroethylene) insulating wire or cable with spiral stripe identifications for aerospace and a preparation process for the insulating wire or cable. The preparation process for the insulating wire or cable includes steps of: printing spiral stripe identifications on an insulating layer of an X-ETFE insulating wire directly formed by a single insulating core wire; printing spiral stripe identifications on a sheath layer of an X-ETFE insulating cable formed by a single insulating core wire, a shielding layer and the sheath layer; printing spiral stripe identifications on an insulating layer and/or a sheath layer of an X-ETFE insulating cable formed by a plurality of insulating core wires, the shielding layer and the sheath layer; and printing spiral stripe identifications on an insulating layer and/or a sheath layer of an X-ETFE insulating cable formed by a plurality of insulating core wires and the sheath layer. The insulating core wires consist of conductors and the insulating layers which wrap the conductors. The X-ETFE insulating wire or cable with the spiral stripe identifications for aerospace is easy to be distinguished and identified, convenient to trace back and rapid in checking, and is beneficial to waste wire recovery. In addition, the X-ETFE insulating wire or cable with the spiral stripe identifications for aerospace has excellent high-temperature resistance, low-temperature resistance and radiation resistance, and the mechanical performance of the insulating layer is quite good.

The invention relates to the field of packaging covers, in particular to aluminum foil of an easily torn cover. The aluminum foil comprises a blocking layer, a protective layer arranged on the upper surface of the blocking layer and a heat-seal layer arranged on the lower surface of the blocking layer, wherein the protective layer is formed by mixing acrylic resin, ethyl acetate, polyamide resin and an organosilicon slip agent; the blocking layer is formed by mixing acrylic resin, polyolefin resin, ethyl acetate and MDI polyurethane. The protective layer of the aluminum foil has the characteristics of corrosion resistance, oxidation resistance, bright and smooth surface and the like; the heat-seal layer has the characteristics of good sealing effect, air tightness, liquid tightness and no adhesive liquid residue on a cover ring after opening; the whole aluminum foil of easily torn cover further has the advantages of easiness in tearing and completeness in tearing.

The invention relates to a complete denture and a preparation method thereof, which belongs to the technical field of oral repairing. The denture comprises a foundation support and artificial teeth; the foundation support of maxillary artificial teeth comprises an upper alveolar crest top area and an alveolar crest side area, the artificial teeth are arranged on the foundation support of the upperalveolar crest top area, and the alveolar crest side area is disposed in an a curved area of the upper alveolar crest top area; a foundation support portion, facing the front side of the oral cavity,of the outer portion of the upper alveolar crest top area is made of silicone rubber; the foundation support of the underjaw artificial teeth comprises a lower alveolar crest top area and a retromolar pad area, the artificial teeth are arranged on the foundation support of the lower alveolar crest top area, and the retromolar pad area is disposed on an end of a curve of the lower alveolar crest top area; and the foundation support portion, facing the front side of the oral cavity, of the outer portion of the lower alveolar crest top area is made of silicone rubber, and the end of the retromolar pad area is made of silicone rubber. The soft silicone rubber on the edge of a specific portion can increase the fixation force, so that a repairing opportunity can be provided for a patient with apoor alveolar crest condition.

The invention relates to a perovskite-type titanium-strontium-cobalt catalyst for hydrogen production by autothermal reforming of acetic acid and a preparation method. The catalyst with resistance tosintering, anti-carbon deposit, oxidation resistance and high activity is provided to aim at solving the problems that an existing catalyst has carbon deposits, sintering and oxidation of active components in the autothermal reforming process of acetic acid, and deactivation of the catalyst is caused. According to the perovskite-type titanium-strontium-cobalt catalyst for the hydrogen production by autothermal reforming of acetic acid and the preparation method, a sol-gel method is adopted to prepare the perovskite-type titanium-strontium-cobalt catalyst, and after calcination, a perovskite composite oxide catalyst Ti<1-x>Sr<x>CoO3 is obtained, wherein x=0-0.8. The perovskite structure facilitates the dispersion of an active component Co, strengthens the synergistic effect between the active component and a carrier, and inhibits the aggregation and growth of Co, thereby obtaining stable small-particle-size Co particles. In addition, Ti is partially replaced with Sr to increase the surface defect position and lattice defect structure of the perovskite-type catalyst, so that the carbon deposit resistance, oxidation resistance and thermal stability of the active component cobalt are improved, the diffusion of acetic acid, water vapor and oxygen is further facilitated, and the catalytic activity is increased.

The invention belongs to the technical field of bioengineering, and particularly relates to a low-temperature glucose oxidase and a production method and application of the low-temperature glucose oxidase. The glucose oxidase is produced from Aspergillu niger CH870, and the preservation number is CGMCC No.14138. The enzyme activity of a fermentation liquid of the glucose oxidase produced through fermentation of a strain reaches more than 2300 U/ml, the produced glucose oxidase is stable when the pH is within 2.0-8.0, the most appropriate reaction temperature is 20 DEG C, the stability is good, the glucose oxidase resists oxidation, the residual enzyme activity is 100% under the condition of 30 mmol hydrogen peroxide, the residual enzyme activity is 90% under the condition of 200 mmol hydrogen peroxide, and the application is extensive.

The invention relates to a cable material, and in particular relates to a modified heat-proof anti-oxidation nitrile rubber cable material which is prepared from the following raw materials in parts by weight: 30 to 34 parts of nitrile rubber (N41), 10 to 12 parts of granulated cork, 20 to 24 parts of epichloro-hydrin rubber, 10 to 12 parts of SG-3 polyvinyl chloride, 10 to 12 parts of low-density polyethylene, 24 to 27 parts of N550 carbon black, 30 to 34 parts of N220 carbon black, 7 to 9 parts of adipic acid diester, 4 to 5 parts of N-cyclohexylthiophthalimide, 2 to 3 parts of titanate coupling agent TMC-TTS, 2 to 4 parts of stearic acid, 1 to 2 parts of accelerant Na-22, 12 to 14 parts of nano silicon dioxide, 2 to 3 parts of epoxy flaxseed oil, 1 to 2 parts of sulphur, 3 to 4 parts of zinc oxide, 3 to 4 parts of magnesium oxide and 4 to 5 parts of auxiliary agent. The performance of the traditional nitrile rubber cable material is improved by combining the advantages of the nitrile rubber, the epichloro-hydrin rubber, the SG-3 polyvinyl chloride, the low-density polyethylene and the other raw materials. Thus, the modified heat-proof anti-oxidation nitrile rubber cable material is superior in processability and usability, and has the characteristics of heat resistance, oxidation resistance, aging resistance and the like. Therefore, the modified heat-proof anti-oxidation nitrile rubber cable material can adapt to specific application environment conditions, thereby having broad market application prospect.

The invention discloses an irradiation cross-linking low-smoke halogen-free sheath material for a photovoltaic cable, wherein the irradiation cross-linking low-smoke halogen-free sheath material comprises the following components in parts by mass: 10-30 parts of an ethylene-vinyl acetate copolymer, 5-20 parts of ethylene propylene diene monomer, 5-20 parts of high-density polyethylene, 5-30 partsof aluminum hydroxide, 5-35 parts of magnesium hydroxide, 1-10 parts of diethyl aluminum hypophosphite, 1-5 parts of a compatilizer, 0.5-3 parts of a cross-linking sensitizer, 0.5-2 parts of an antioxidant, 1-5 parts of a lubricant and 2-5 parts of carbon black. By adding the components according to the specific ratio, the sheath material ensures good mechanical properties and good processabilitywhile prolonging the service life and enhancing the light transmittance and the flame retardancy in smoke.

Disclosed is a highly safe battery separator, in particular a separator for a lithium ion secondary battery, which reduces internal resistance, achieves good ionic conductivity, prevents passing of electrode active materials, and also prevents electrical short circuit by controlling deposition of lithium metal (dendrite). Also disclosed is a means for stably producing the battery separator with high productivity. Specifically disclosed are: a battery separator which is composed of a porous polyolefin sheet that is formed from a group of polyolefin nanofilaments that have an average filament diameter of less than 1 μm and a filament size distribution of 0.2 or less; and a means for producing the battery separator.

The invention relates to a steel material, in particular to a steel material used for coke furnace grate bar, which is exactly heat-resistant steel- 50Cr17Mn12SiNREBTiNi. The invention solves the problems that the steel material which is used for manufacture the grate bar has low oxidative resistance, high cost or high price, and are easy for peeling and the like. The invention includes the following elements according to weight percentage: C: is less than 0.50: percent, Si: 2.5 percent-2.7 percent, Cr: 17 percent-19 percent, Mn: 10 percent-12 percent, S: less than or equal to 0.05 percent, P: less than or equal to 0.05 percent, N: 0.22 percent-0.30 percent, RE: 0.08 percent-0.12 percent, B: 0.005 percent-0.007 percent, Ti: 0.05 percent-0.08 percent, Ni: 3.5 percent-4.5 percent, and also carries out the following heat treatment of: heating up to 1000-1050 DEG C and then carring out solution treatment. The invention has the advantages of oxidation-resistivity, no peeling even used for long time and high temperature resistance (above 900 DEG C). The heat-resistant steel is durable and has low use cost.

The invention discloses an ultraviolet lamp ionizing device taking photoelectrons as an electron source. The ultraviolet lamp ionizing device comprises an ionizing cavity, an ultraviolet lamp, a repulsion electrode, a focusing ring, an orifice plate, a capillary sample and a lens system. In the invention, the ultraviolet lamp generates photoelectrons on the metal electrode, and then the photoelectrons are accelerated to be collided with molecules of the sample by utilizing an electric field to realize electron ionizing. The ultraviolet lamp ionizing device has the characteristics of wide range of samples to be tested, oxidation resistance, long service life, wide working voltage range and the like so as to have broad application prospect on the aspects of process monitoring and pollutant real-time on-line analysis.

The invention belongs to the technical field of biological engineering, and particularly relates to aspergillus niger of producing low temperature glucose oxidase and a production method of the glucose oxidase. The aspergillus niger is aspergillus niger CH870, and has a collection number of CGMCC (China General Microbiological Culture Collection Center) No. 14138. Enzyme activity of fermentation liquid of the glucose oxidase produced by fermentation of the strain reaches above 2300U/ml; the produced glucose oxidase is stable in a pH (potential of hydrogen) scope of 2.0-8.0; the most suitable reaction temperature is 20 DEG C; the glucose oxidase is good in stability and has oxidation resistance; the residual enzyme activity is 100% under the condition of 30mmol hydrogen peroxide; the residual enzyme activity is 90.8% under the condition of 200mmol hydrogen peroxide; and the glucose oxidase is wide in application.

The invention relates to a hydrotalcite-like type iron-promoted nickel-based catalyst for hydrogen preparation through autothermal reforming of acetic acid and a preparation method and provides a high-activity novel catalyst resisting oxidation, sintering and carbon deposition to solve the problem that existing catalysts are inactivated due to the structure change as well as oxidation and sintering of active components of the catalysts in the autothermal reforming process of acetic acid. The chemical component of the catalyst is (ZnO)a(NiO)b(AlO1.5)c(FeO1.5)d, wherein a ranges from 0.75 to 3.25, b ranges from 0.25 to 0.75, c ranges from 0 to 1.0 and d ranges from 0 to 1.0. The Zn-Al type carbonate hydrotalcite-like structure is prepared with a co-precipitation method to serve as a precursor, and an active component nickel and an auxiliary iron are introduced and enter the position of the hydrotalcite-like structure through isomorphous substitution of zinc for nickel and isomorphous substitution of aluminum for iron; a compound oxide obtained through sintering effectively inhibits possible migration, accumulation, oxidation and sintering of the active component nickel under the high-temperature reaction condition, and the activity and the stability of the catalyst are improved.

The invention relates to ethylene-Propylene-diene monomer (EPDM)-based conductive rubber and a preparation method of the rubber. The EPDM-based conductive rubber comprises the following raw materials in percentage by weight: 15-20 percent of EPDM rubber, 0.005-1 percent of titanate coupling agent, 0.6-1.2 percent of vulcanizing agent, 4-6 percent of active agent, and 71.8-80.4 percent of conductive powder. The preparation method comprises the steps of drying conductive powder body, performing polarity matching for the conductive powder body particle size, coating and mixing the conductive powder body. The EPDM-based conductive rubber provided by the invention has the advantages of excellent oxidation resistance, ozone and corrosion resistance, good conductive performance, stable resistance time property, controllable resistance temperature coefficient, higher temperature limit and the like.

The invention discloses a spiral strip identification high-temperature resistance flexible electric wire and cable for aviation. With regard to a high-temperature resistance flexible electric wire which is directly formed by a single insulating core wire, spiral strip identification is printed on an insulating layer; with regard to a high-temperature resistance flexible electric cable consisting of a single insulating core wire, a shielding layer and a jacket layer, spiral strip identification is printed on the jacket layer; with regard to a high-temperature resistance flexible electric cable consisting of a plurality of insulating core wires, a shielding layer and a jacket layer, spiral strip identification is printed on an insulating layer and/or the jacket layer; with regard to a high-temperature resistance flexible electric cable consisting of a plurality of insulating core wires and a jacket layer, spiral strip identification is printed on an insulating layer and/or the jacket layer; and each insulating core wire consists of a conductor and an insulating layer coating the conductor; each conductor is manufactured by twisting conductor single wires; and the minimum diameter of each conductor single wire is 0.051 mm. The electric wire and cable provided by the invention are easy to distinguish and identify, and have good high-temperature and low-temperature resistance, and radiation resistance, and are softer and easy to lay and mount.