7results about How to "Chemically active" patented technology

The application discloses a resistive switching memory structure and a manufacturing method thereof. The resistive switching memory structure comprises, from bottom to top, a bottom electrode, a resistive switching layer and a top electrode. The upper surface of the bottom electrode and the lower surface of the resistive switching layer are in Schottky contact, and the lower surface of the top electrode and the upper surface of the resistive switching layer are in Ohmic contact. The resistive switching layer is a single oxide film layer. The materials of the bottom electrode and the top electrode are the same metal nitride, and the atomic number ratio of metal elements to nitrogen elements in the top electrode is greater than that in the bottom electrode. The application can simplify the structure of the memory, reduce the process complexity and manufacturing cost.

The invention relates to the technical field of building materials, and discloses a construction method for manufacturing a PHC pipe pile by replacing cement with pipe pile residual slurry, which comprises the following steps: step 1, preparing raw materials: weighing S105 mineral powder, silica fume, cement, water, sand, stone and a water reducing agent according to a formula proportion; 2, cement and water accounting for 1 / 3 of the formula proportion are put into a concrete mixer to be stirred, after a hydration reaction is conducted for 2-2.5 min, the S105 mineral powder, the silica fume and water accounting for 2 / 3 of the formula proportion are added to be evenly stirred, and then a chemical reaction is conducted for 3-5 min; 3, after the reaction in the step 2 is completed, the water reducing agent, the sand and the stone are added into a concrete mixer and mixed to be uniform, and then the pipe pile residual slurry is prepared, the high-strength concrete prepared from the S105 mineral powder, the silica fume, the cement, the water, the sand, the stone and the water reducing agent replaces cement concrete of a traditional formula, the same construction performance and mechanical performance are achieved, and the construction cost is reduced. The mineral powder and the silica fume belong to solid waste materials, solid waste can be reduced, and low carbon and environmental protection are achieved.

This invention discloses a single-atom catalyst based on a functionalized MOF, its preparation method, and its application. The method includes the following steps: dissolving an X metal precursor solution, Zn precursor powder, and 2-methylimidazolium organic ligand powder in alcohol, ultrasonically mixing, microwave heating, oven drying, and tube furnace calcination to obtain an X / MOF material; dissolving the X / MOF material in alcohol, adding carbon powder, ultrasonicating, and then adding a Pt precursor solution, stirring; adding an alkaline solvent dropwise, microwave heating, washing, centrifugation, drying, and calcination to obtain a Pt-X bimetallic single-atom catalyst. The catalyst obtained by this invention has an X metal single atom supported by a MOF core and a Pt single atom supported by carbon shell. Compared to catalysts with two or more metal active components simultaneously supported in the core or shell, this isolated structure is beneficial for the dispersion of single atoms and prevents them from agglomerating into large atomic clusters, thus ensuring structural stability.

The invention relates to the technical field of oilfield exploitation, and provides a rare earth complex trace element tracer agent for oilfield development. The method comprises the following steps: firstly, preparing a complexing agent aqueous solution, and dissolving a selected complexing agent in a proper amount of water to obtain the complexing agent aqueous solution; preparing a rare earth salt aqueous solution, reacting the rare earth element powder with dilute acid to generate rare earth salt precipitate, extracting the rare earth salt precipitate, performing evaporative crystallization, drying and crushing to obtain rare earth salt powder, and dissolving the rare earth salt powder in a proper amount of water to obtain the rare earth salt aqueous solution; and then adding the rare earth salt aqueous solution into the complexing agent aqueous solution, placing the mixed solution in a water bath at the constant temperature of 90 DEG C, uniformly stirring, continuously carrying out complexing reaction for 3 hours, crystallizing, crushing and drying to obtain the rare earth complex trace element tracer agent.

The application provides a battery cell, which comprises a positive electrode sheet, a separator and a negative electrode sheet; the positive electrode sheet comprises a positive electrode current collector and a positive electrode active material layer; the positive electrode active material layer comprises a positive electrode active material, the positive electrode active material comprises lithium cobaltate, the particle size of the lithium cobaltate is d1, the unit is mu m, and the value range of d1 is 0 mu m < d1 <= 2 mu m; the negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer coated on the surface of the negative electrode current collector; the thickness of the negative electrode current collector is 7 mu m-11 mu m; the negative electrode active material layer comprises a second binder, and the second binder comprises a CMC compound; by introducing lithium cobaltate particles with a particle size of 0-2 mu m into the positive electrode sheet, adopting a negative electrode current collector with a thickness of 7 mu m-11 mu m, and simultaneously adopting a CMC compound in the negative electrode active material layer, the direct current resistance of the battery can be small, the heat generation in the cycle process can be reduced, the by-products caused by temperature rise can be relatively reduced, and the long cycle performance of the battery cell can be ensured.

The invention relates to the technical field of composite materials, in particular to a non-isocyanate polyurethane resin composite material for pultrusion and a preparation method of the non-isocyanate polyurethane resin composite material for pultrusion. Green and sustainable raw materials and a green and environment-friendly process route are used, and the composite material of the non-isocyanate polyurethane resin for pultrusion, which is prepared by taking the non-isocyanate polyurethane as the raw material, can be used for manufacturing solar brackets, telegraph poles, door and window frames and cable brackets; in this way, the technical problems that in the prior art, polyurethane is prepared from isocyanate and polyol as raw materials, and the used isocyanate is active in chemical property, large in toxicity, poor in water resistance, inconvenient to store and transport and environment-friendly are solved.

The present application relates to the technical field of asphalt modification, and particularly relates to a hydrophobic modified lanthanum cerium oxide, a preparation method and application thereof. The hydrophobic modified lanthanum cerium oxide is prepared by the preparation method. The preparation method comprises the following steps: adding a first suspension containing a carboxylic acid alkyl surfactant into a second suspension containing nano lanthanum cerium oxide, and obtaining a mixed solution containing a pre-product after stirring and reaction; obtaining a solid-phase pre-product after solid-liquid separation of the mixed solution containing the pre-product; and obtaining a hydrophobic modified lanthanum cerium oxide powder after washing, drying, grinding and screening through a 200-mesh screen in sequence. The application is the application of the hydrophobic modified lanthanum cerium oxide in asphalt ultraviolet aging resistance. The present application can ensure good ultraviolet resistance of asphalt.