87results about How to "Lower binding energy" patented technology

The invention relates to a heat insulating layer on a metallic substrate for using for high temperatures, especially for temperatures above 1300° C. Starting with a base of La2Zr2O7, the properties of the heat insulating substance to be used as the heat insulating layer are regularly improved, by substituting lanthanum cations with ions of elements Nd, Eu, Dy, Sm and/or Gd. An additional, at least partial substitution of the zirconium cations by Ce, Hf or Ta is advantageous. Improving the properties results especially in a high thermal coefficient of dilation alpha and low heat conductivity lambda.

The invention relates to a TiAl-intermetallic-compound vacuum diffusing connection method, belonging to the TiAl-intermetallic-compound welding field, which overcomes the technical drawbacks of high temperature of diffusing connection and high pressure of diffusing connection in the prior TiAl-intermetallic-compound diffusing connection technology. The invention adopts hydrogenated titanium or titanium alloy chaff as the interface layer of diffusing connection. Ti3Al+TiAl dual phase (Alpha2+Gamma) organ can be formed under the temperature of diffusing connection titanium, which facilitates the formation of high-intensity connector lug of TiAl-intermetallic-compound diffusing connection. And hydrogen makes the flow stress of thermal deformation of titanium or titanium alloy decrease and the thermal plasticity increase, so that hydrogenated titanium or titanium alloy is prone to deform under high temperature. Meanwhile,, the self-diffusing capacity of hydrogen in titanium or titanium alloy and the diffusing capacity of solute are enhanced, more particularly, in Beta phase the capacities are more enhanced, so that hydrogen can accelerate the diffusing of the alloy elements, reduce the atomic combination energy and the diffusing activation energy, promote the diffusing coordinated deformation capacity, and the reliable diffusing connection of connector lug of TiAl-intermetallic-compound can be realized under comparatively low temperature.

A fabric for use in chemical and biological (CB) protective garments includes at least one felt layer having from 25% to 100% carbon nanotube (CNT) fibers as a breathable physical barrier against toxic chemical droplets and/or pathogens. The felt layers are cleaned and consolidated into a mechanically competent sheet which can form adhesive seams having lapshear greater than the sheet itself. An additional supporting layer can be included. The supporting layer can be a wicking layer which is permeable with a chlorinated or otherwise chemically active solution to establish a reactive chemical barrier, the solution being dispensed on demand from a portable container. Embodiments include a second layer of CNT or of another backing fabric, sandwiching the wicking layer therebetween. Impermeable fluoropolymer seams can divide the fabric into a plurality of CNT/wicking cells. A layer of activated charcoal and/or halamine-forming hydantoin can be included for persistent reactive chemical protection.

The disclosed electrode piece of LiMn2O4 is modified by polymer, which contains functional group of possessing complexation capability with Mn ion. The electrode piece solves issue of difficulties for cladding oxide and thin grains in LiMn2O4 material modified by conductive polymer as well as issue of easy dropping-out clad caused by regrinding. Since effects of complexation and valence bond between polar group of polymer and Mn ions at surfaces of LiMn2O4 grains, oxygenolysis ability of Mn4+ ions for electrolyte and disproportionation degree happened in Mn3+ ions are reduced so as to prevent digestion and migration of lithium ions and increase cyclical stability in high temperature of lithium cell by using LiMn2O4 as positive pole. Features of preparing technique are: simple, feasible and value of industrialization.

The invention discloses an iamine-polyanion lithium salt and a preparation method thereof as well as application of the iamine-polyanion lithium salt as nonaqueous electrolyte. The invention provides the iamine-polyanion lithium salt containing 'S-fluoroalkylsulfonyamino'. The iamine-polyanion lithium salt has excellent dissolving capacity in nonaqueous solvents such as carbonate esters, ethers and ionic liquid; the nonaqueous electrolyte of the iamine-polyanion lithium salt has the advantages of high-temperature conductivity, high lithium ion transference number, no corrosion to an aluminum foil at high potential, good compatibility between the nonaqueous electrolyte and a metal lithium electrode and other widely-used electrode materials, and the like, and can be used for a lithium ion battery or a secondary lithium battery.

The invention discloses a preparation method of a novel transition metal-nitrogen co-doped carbon material oxygen reduction/oxygen evolution difunctional catalyst. Transition metal in the catalyst comprises silver, cobalt and iron, and the molar ratio of the silver to the cobalt to the iron in the catalyst is 1 to (8-12) to (5-9). The transition metal-nitrogen co-doped carbon material oxygen reduction/oxygen evolution difunctional catalyst is prepared by using a low-cost complexing agent and a metal ion complexing method, and has the characteristics of low cost, simple operation and easy synthesis; additional metal reducing agent or separate addition of a nitrogen dopant is not needed, so that doping elements can be uniformly distributed; the content of a doppant on the surface of the catalyst is high, and the problem of agglomeration of metal particles and the like can be effectively avoided, thereby improving the catalytic performance. Relatively high ORR (Oxidation-reduction reaction) and OER (Oxygen evolution reaction) catalytic activity and stability in an alkaline solution are exhibited; meanwhile, relatively good resistance to methanol is realized; the catalyst has relatively good catalytic performance when applied to zinc-air batteries.

The invention belongs to a method for synthesizing a nanometer material from top to bottom by a physical mode, and discloses a method for synthesizing a cobalt oxide and ferrocobalt layered bimetal hydroxide compound. The method comprises the steps of taking a block-shaped ferrocobalt alloy target as a raw material, and polishing and cleaning to remove an oxide layer on a surface; placing the block-shaped ferrocobalt alloy target in a container, and adding a sodium chloride solution to a position above the alloy target by 3-4 centimeters; performing ablation on the alloy target for 20-30 minutes by employing a nanosecond pulse laser liquid phase with a wavelength being 1,064 nanometers; and finally, taking out a brown solution in the container, performing freezing and drying to obtain a powder compound product after centrifugation. The ferrocobalt alloy target in the sodium chloride solution is ablated by a nanosecond laser liquid phase ablation technology to obtain the cobalt oxide and ferrocobalt layered bimetal hydroxide compound, the defect of poor conductivity of the material is effectively overcome by a synergistic effect of the cobalt oxide and ferrocobalt layered bimetal hydroxide, and meanwhile, the catalytic activity of water electrolysis to generate oxygen is also greatly improved; and the method is simple in process, ingenious in design and low in cost, and is safe and controllable.

The invention discloses a low-pressure synthesized ammonia catalyst. The atomic percentage of chemical ingredients of the low-pressure synthesized ammonia catalyst is as follows: 10 to 22 percent of neodymium, 50 to 85 percent of iron, 1 to 18 percent of cobalt, 0.3 to 1 percent of gallium, 0.01 to 0.2 percent of zirconium and 1 to 11 percent of boron. The catalyst has high catalytic effect under 100 to 300 DEG C and 0.1MPa to 10MPa, and especially under the reaction condition of 100MPa, 10000h<-1> and 100 DEG C, the concentration of ammonia at an outlet reaches 29.2 percent. Compared with the existing industrial ammonia synthetic iron catalyst, the low-pressure synthesized ammonia catalyst has the characteristics of low temperature, low pressure and high activity and is wide in application prospect.

An epitaxial growth method for improving P-type doping concentration of a nitride light emitting diode relates to the technical field of nitride epitaxy. A buffer layer, an N-type layer, a light emitting active layer, an electron blocking layer, a P-type layer and a contact layer are sequentially grown on a substrate, the epitaxial growth method is characterized in that the P-type layer is formed through layered growth by controlling the flow of trimethyl indium under the atmosphere of N2 and ammonia gas, the hole concentration of a P-Al<X>Ga<1-X>N material layer can be obviously improved, the square resistance can be obviously reduced, and the light emitting diode (LED) photoelectric property based on the material layer can be obviously improved.

A bimetal Rh-Li catalyst for the hydroxylation reaction of methanol to obtain acetic acid or the carbonylating reaction of methyl acetate to obtain ethylanhydride is disclosed, which has 3 basic structures and features high activity, selectivity and stability. Its preparing process includes such steps as copolymerization of 2-vinylpyridine or 4-vinylpyridine on acrylic acid, acrylate, or maleic acid anhydride, hydrolzying by strong alkali, acting on lithium hydroxide to obtain ligand, reacting on Rh compound and coordination.

The invention provides a platinum phosphide nano-catalyst and a preparation method thereof, and application of the platinum phosphide nano-catalyst in electrocatalytic oxygen reduction. The preparation method comprises the following steps: 1) dispersing a platinum catalyst in a solvent, and carrying out uniform mixing under stirring to obtain a platinum catalyst dispersion liquid; and 2) adding aphosphorus source into the platinum catalyst dispersion liquid, carrying out uniform mixing under stirring, carrying out a reaction at a certain temperature, and performing centrifuging and washing after the reaction is finished so as to obtain the platinum phosphide nano-catalyst. According to the method, phosphorus atoms generated by decomposition of the phosphorus source are diffused into the platinum catalyst at a certain temperature, so the platinum phosphide nano-catalyst with a specific electronic structure is synthesized. The preparation method has the advantages of simple process, lowcost, good repeatability, no environmental pollution and convenience in large-batch preparation; and the prepared platinum phosphide nano-catalyst shows far higher catalytic activity and stability inan electrocatalytic oxygen reduction reaction compared with commercial platinum/carbon catalysts, and has good application prospects.

The invention discloses a method for improving the p-type ohmic contact performance of a GaN-based light-emitting device. The method comprises the following steps of: carrying out activation treatment on the p-type GaN of a GaN-based light-emitting epitaxial wafer taking sapphire as a substrate; producing an indium tin oxide ITO layer with a thickness of 100-300nm at one side of the p-type GaN; carrying out annealing treatment on a sample in a nitrogen environment, an annealing temperature being kept at 450-550 DEG C, and an annealing time being 1-15 minutes; corroding by acid solution to remove indium tin oxide ITO; carrying out a p-type GaN ohmic contact process for the traditional structure on the surface of the sample after the indium tin oxide ITO is removed, so as to complete production for a p-type contact electrode. With the adoption of the method disclosed by the invention, the binding energy of Ga2p on the surface of the p-type GaN can be reduced after ITO annealing, thus reducing the Schottky contact barrier height, therefore, obtaining for a more excellent ohmic contact characteristic is facilitated.

The invention provides a heat-resistant anti-static adhesive film having at least includes a top film, a silane-treated release layer on an underlying substrate layer, and a pressure-sensitive adhesive layer coated over the release layer. The pressure-sensitive adhesive layer is obtained by adding a plasticizer, an ionic compound or an anti-static agent, a cross-linking agent and aliphatic or alicyclic multi-functional isocyanate into (meth)acrylate polymer of the reactive silane compound. The composition has a long working life (pot life) of up to 24 hours and anti-static capability. A pressure-sensitive patch or surface protective film containing the abovementioned composition in the form of sheets or strips is capable of standing high temperature of 150 for up to 3 hours without leaving glue residue.

Provided is a thin film semiconductor device that exploits excitonic characteristics of various organic semiconductor materials. The device may include an anode (120), a cathode (170), and a donor-acceptor heterojunction (150) disposed between the anode and the cathode. The donor-acceptor heterojunction may further include an acceptor material (404) having a highest occupied molecular orbital (HOMO) and a lowest unoccupied molecular orbital (LUMO), and a donor material (402) comprising a hybrid organic-inorganic metal halide perovskite semiconductor. Other embodiments are disclosed and additional embodiments are also possible.

A vacuum diffusion connecting carbon/carbon composite material method belongs to the welding field of the carbon/carbon composite material. The present invention settles the problems of high jointing temperature, large metal deformation of the partial part of joint and inferior joint capability in the existing diffusion connecting carbon/carbon composite material. The invention comprises the following steps: 1. doing cleaning to the surface of the base metal; 2. homogeneously parking the diffusion middle layer to the connecting surface of the base metal to be welded; 4. reducing temperature then the welded component which is connected well is obtained. The diffusion connecting carbon/carbon composite material of the invention is reduced by 100 to 300 DEG C, the shear strength of the diffusion connecting between the carbon/carbon composite material and the carbon/carbon composite material or the carbon/carbon composite material to other metal material is increased by 20 to 220 percent, and the metal at the joint has no evident shape change.