52results about How to "Unique microstructure" patented technology

The invention discloses a technology for preparing an agricultural drought-resistant water retaining agent, which belongs to the field of one of the agricultural drought-resistant water retaining technologies. The technology is mainly characterized by comprising the following steps of: initiating the polymerization of acrylic acid and acrylamide monomers by using a nanometer silicon dioxide-ammonium persulfate compound system under a low-pressure heating condition. The water retaining agent prepared by using the technology is quite strong in salt resistance (70-120 times in absorbing normal saline), and proper in water absorbency (300-500 times), can resist drought and retain water in soil, simultaneously does not compete for water with plants, does not harden, and therefore can be widely applied to the fields of agriculture and desertification control for drought resistance and water retaining.

This invention provides a method for preparing pipe type ceramic capacitor containing the method for preparing surface layer-pipe type ceramic capacitor and grain boundary later pipe type ceramic capacitor through preparing semiconductor ceramic material with high effective dielectric constant to substitute I group or II group medium ceramic material for preparing large capacity pipe type ceramic capacitor. The effective dielectric constant of said semiconductor ceramic can reach to ten of thousands even hundred of thousands.

Disclosed is a novel metallic film preparation technology on liquid phase substrate surface, which comprises using liquid phase material whose saturated vapor tension is lower than the vacuum evaporation pressure as substrate, employing magnetron sputtering or thermal deposition method, evaporating the metal atoms with energy of argon ions in high speed movement or tungsten filament heated by electric current, then depositing the evaporated metal atoms onto liquid phase substrate surface, finally growing metallic film having polycrystalline grain structure through diffusion, core formation, rotation and agglomeration. The film has substantially no internal stress.

A method for preparing a high-intensity and high-plasticity iron steel material with high manganese and aluminum contents belongs to the processing field of iron steel materials. A high-intensity and high-plasticity iron steel material with high manganese and aluminum contents includes the following components: C%: 0.6-1.2wt%, Mn%: 18-33wt%, Al%: 8-13wt%, S% less than 0.008%, P% less than 0.02%, Fe or inevitable impurities in balancing amount. The preparation methods comprises steps as follows: a material plate blank after the smelting preparation is prepared in the processes of heat rolling and cold rolling, the thickness of a cold-rolled plate is 0.8-1.5 mm, and the cold-rolled steel plate keeps the temperature of 700-1300 DEG C for 10-20 minutes in a heating furnace and cools at the speed of 10-50 DEG C/s to the room temperature. The invention can achieve different levels of intensity and plasticity proportions through process control, and the performance includes shear strength being 540-1240 MPa, tensile strength being 780-1310 MPa and extensibility being 10.0-76.0%. The high-intensity and high-plasticity iron steel material with high manganese and aluminum contents prepared by the invention plays a significant role and has great application space for the booming automobile industry and the military industry.

The invention discloses a preparation method of bamboo fiber paper cups. The invention relates to a bamboo fiber paper cup and a production process thereof. The bamboo fiber paper cup mainly structurally comprises a hollow fiber cup body, and is characterized in that the cup body comprises an outer layer, an inner layer, a hollow layer arranged between the outer layer and the inner layer and a coating layer above the inner layer. The outer layer and the inner layer are prepared from the following components in parts by weight: bleached bamboo fibers, dahurian larch fibers, modified starch, chitosan, talc powder, a dispersant, guar gum, glyceride hydrolase and a wet-strength agent. The hollow layer is prepared from the following components in parts by weight: polypropylene hollow short fiber pulp, dahurian larch fibers, chitosan, talc powder and a dispersant. According to the above settings, the outer layer and the inner layer are produced by employing bamboo fibers. The bamboo fiber pulp not only is environment-friendly, but also has the characteristics of being excellent in antibacterial property, bacteriostatic and free of peculiar smells. The hollow fiber layer has the functionsof being light in weight, heat insulative and warm-keeping. The bamboo fiber paper cup serving as a hot drink paper cup and a cold drink paper cup simultaneously is relatively safe.

The invention relates to a Co-modified metal organic framework-derived ZrO2/C electromagnetic wave absorbing material, and a preparation method and an application thereof. The electromagnetic wave absorbing material is of a three-dimensional network structure formed by interweaving one-dimensional fibers. The fiber is composed of a carbonaceous matrix, ZrO2 and Co nanoparticles. The Co nanoparticles are embedded in the surface of the carbonaceous matrix uniformly distributed by ZrO2. The method comprises the steps that 1, a cobalt source, a zirconium source, an anhydrous acetic acid organic ligand and DMF are processed into a solvothermal solution, the organic ligand containing a carbon source, an MOF precursor is obtained after solvothermal reaction, the MOF precursor is washed and dried,then the MOF precursor is treated with the cobalt source, and cobalt source composite MOF is obtained; and (2) the compounded MOF precursor is placed in a protective atmosphere to convert cobalt ionsin a cobalt source into elemental cobalt, a zirconium source into ZrO2 and an organic ligand into a carbon matrix, thereby obtaining the catalyst. According to the preparation method disclosed by theinvention, ZrO2, Co and C are effectively subjected to nanoscale compounding, so that the prepared material has excellent performance.

The invention discloses a high-extensibility electrolytic copper foil and a preparation method thereof, and belongs to the technical field of preparation of electrolytic copper foils for copper-clad plates. The preparation method comprises the following steps: firstly, preparing a nano twin-crystal copper foil through a direct-current electrolytic deposition technology, and then annealing the nano twin crystal copper foil to obtain the high-extensibility electrolytic copper foil, wherein the thickness of the high-extensibility electrolytic copper foil is controllable and adjustable in a range of 3-100 microns. The electrolytic copper foil has one or more crystal grains along the thickness direction, and the size range of the crystal grains is 0.5-20 microns; and one or more twin-crystal lamellas exist in the crystal grains. When the thickness of the electrolytic copper foil is 12 microns, the elongation of the electrolytic copper foil is as high as 15%, the tensile strength is 191MPa, and the electrolytic copper foil has a relatively good application prospect in the field of flexible copper-clad plates.

A unit pyroelectric infrared detector consists of top and bottom electrodes, BST ceramic semiconductor and BST ceramic oxide layer media wrapped outside of said semiconductor. It features that BST ceramic semiconductor is prepared by high temperature sintering and reduction heat treating ( Ba 0.7 Sr 0.3 ) TiO3 ceramic base material doped with 1 ¿C 5 wt % rare earth impurities with its thickness less than 0.20mn and resistance rate less than 10ª©.cm, BST ceramic oxide layer media is prepared by oxidizing surface of ceramic semiconductor with its thickness of 5 ¿C 10 micro m. The preparing method is also provided.

The invention discloses a composite lithium battery cathode with high energy storage efficiency, a preparation method thereof and a lithium battery. The lithium battery cathode comprises a a current collector and an active cathode slurry applied to the surface of the cathode current collector; the active cathode slurry is prepared from modified silicate composite material, a conductive agent and abinder; and the cathode current collector is a modified carbon nanotube/carbon nanofiber composite film. Compared with the prior art, the cathode current collector disclosed by the invention not onlyimproves the energy density of batteries, but also resists the corrosion of electrolyte and improves adhesion; because a silicate precursor which is prepared by in-situ carbonization composition andball-milling/spray-drying is adopted as the modified silicate composite material, the sintering and agglomeration between silicate particles can be prevented, and the transmission path of lithium ionscan be shortened; because the external surface of the silicate active material is wrapped by a fast ion conductor layer to form a mosaic structure, the material is prevented from being in direct contact with the electrolyte, the lithium ion diffusion capability is improved, and the interface resistance between the material and the electrolyte is decreased.

The invention relates to a method for preparing porous germanium by utilizing electrodeposition of ionic liquid. The invention relates to the method for preparing the porous germanium. The invention aims the solve the problems that germanium-based materials prepared by the existing method are mostly granular, even if gaps exist among granules, the gaps are smaller and unordered, and cannot better buffer volume expansion of the germanium, or the gaps in block shapes cannot provide more buffer space, and meanwhile, the traditional preparation method is high in preparation cost, not environment-friendly, and tedious in process. The method comprises the following steps of (1) a hydrogen foam method; (2) cleaning treatment of electrodes; (3) cleaning treatment of electrolytic cells; (4) electrodeposition of the ionic liquid, so that the porous germanium prepared by utilizing electrodeposition of the ionic liquid is obtained. The invention is applied to a method for preparing the porous germanium by utilizing electrodeposition of the ionic liquid.

The invention provides a preparation method of an MOF-derived composite wave-absorbing material. The preparation process is simple, the cost is low, large-scale mass production can be realized, and the prepared wave-absorbing material has good impedance matching, wide effective absorption bandwidth and high reflection loss value. The ordered porous wave-absorbing material is synthesized by taking MOFs as a template, and magnetic metal, alloy or metal oxide generated after calcination can bring excellent magnetic loss, which is beneficial to impedance matching and wider effective absorption bandwidth.

The invention discloses a cold catalyst-containing novel compound air purifying particle and a preparation method thereof, and belongs to the technical field of air purification. The cold catalyst-containing novel compound air purifying particle comprises Baina soil with a 2:1 layered chain-shaped crystal structure, and the Baina soil has a unique microstructure and electric charge properties, sothat most of harmful gases with polarity in air can be adsorbed, secondarily, sepiolite, medical stone and diatom are relatively large in porosity, so that a stable structure and long-lasting adsorbability are achieved by cooperation of the sepiolite, the medical stone and the diatom, and the air purifying particle is strong in adsorbability, and relatively strong in rheological property and catalytic performance, and meanwhile, a cold catalyst contained in the formula can catalyze formaldehyde to react with oxygen in air, and the cold catalyst itself does not participate in the reaction directly in the process of catalytic reaction, so that the decomposition effect of the air purifying particle on formaldehyde is effectively improved, a service cycle of the air purifying particle is prolonged, and formaldehyde is effectively decomposed for a long term.

The invention discloses a preparation method and application of magnesium-nitrogen co-doped biomass activated carbon material with high specific surface area. The activated carbon has a unique macropore-mesopore-micropore three-dimensional composite hole structure, and has a characteristic of magnesium-nitrogen co-doping. The method comprises the following steps: taking hemp cores which are biomass wastes as raw material; after cleaning, drying and carrying out shearing pretreatment, dipping the raw materials in a mixed solution of zinc chloride and magnesium chloride for a period of time, drying and then loading in a tube furnace, and carbonizing, activating and cooling in a nitrogen atmosphere; and after pickling and washing the obtained matter, dipping the obtained matter in an ethanolsolution of aminopyridine for a period of time and then drying to obtain the magnesium-nitrogen co-doped activated carbon. The specific surface area of the activated carbon is high, and the activatedcarbon has excellent carbon dioxide gas adsorption performance.

The invention discloses a copper-aluminum-silicon alloy nanometer negative electrode material of a lithium battery and a preparation method of the negative electrode material, and belongs to the technical field of the negative electrode material of the lithium battery. According to the copper-aluminum-silicon alloy nanometer negative electrode material of the lithium battery and the preparation method of the negative electrode material provided by the invention, a technical scheme is adopted as follows: the copper-aluminum-silicon alloy nanometer negative electrode material of the lithium battery comprises the following raw materials in parts by weight: 27.5-32 parts of silicon, 58-63 parts of copper, 9-11 parts of aluminum and 0-5 parts of impurities; and the overall alloy nanomaterial comprises a multi-defect organization structure of air pores, shrinkage holes, shrinkage porosity, dislocation, vacancy and holes, and the grain diameter is less than or equal to 80[mu]m. The inventioncan be applied to the technical field of the negative electrode material of the lithium battery.