87results about How to "Restore evenly" patented technology

The invention discloses a preparation method for a cathode material Na3V2(PO4)3/C of a sodium ion battery. The preparation method comprises the following steps of: (1) taking a high-valent vanadium source compound, a sodium source compound, a phosphorus source compound and a reducing agent as raw materials, weighing the reaction raw materials according to the molar ratio of a sodium element, a vanadium element and a phosphorus element of being 3:2:3 and the molar ratio of the reducing agent and the high-valent vanadium source compound of being 3:1 to 15:1, carrying out mechanical ball grinding for 2 to 20 hours, and reducing high-valent vanadium into low-valent vanadium at a normal temperature; and (2) forwarding a precursor obtained through ball grinding in the step (1) into an inert atmosphere or a reducing atmosphere, and carrying out heat preservation for 4 to 20 hours at 600-900 DEG C to obtain the Na3V2(PO4)3/C. The method has the advantages of short flow and low cost, and is easy to control, the prepared Na3V2(PO4)3/C is high in purity and crystallinity, and the production of the cathode material Na3V2(PO4)3/C of the sodium ion battery at a large scale is easy to realize.

A method of relaying in a base station (BS) includes: setting, when a backhaul link of a first BS is damaged, a relay link using a second BS, which is an adjacent BS of the first BS as a serving BS; and releasing the relay link after the backhaul link is recovered.

The invention discloses a platinum (Pt)/reduced graphite oxide (RGO) nano composite material and a preparation method and application thereof. According to the preparation method, graphite oxide (GO) and a platinum metal precursor are reduced in one step by radiation and induction of a gamma ray or an electronic beam, thus obtaining the Pt/RGO nano composite material with the Pt load capacity being 1.0wt% to 15wt%; Pt nano particles are uniformly distributed on an RGO sheet layer, and the average diameter of the Pt nano particles is 1.8 nanometers; and the particle sizes of the Pt nano particles are within 2 nanometers. By virtue of the load capacity of the nano particles of platinum metal, the reducing degree of the GO can be increased, the conductivity of a product is improved, and the surface utilization rate of the RGO sheet layer is increased. Compared with the GO and pure graphene, the nano composite material prepared by the method has higher specific capacitance and higher high-current multiplying power when being applied to a super-capacitor electrode material.

The invention provides a composition for facial repair. The composition is composed of the following components in percentage by weight: 0.01 to 1% of EGF freeze-dried powder, 0.01 to 5% of SOD, 0.1 to 5% of active peptide, 0.01 to 2% of allantoin, and the balance being water; wherein the active components are all individually buried in liposome or covered by nano microcapsules before the mixing. The active effective components of the composition are individually buried in or covered by transfer vectors. Then the active effective components are transported to the corium layer or shallow corium layer by the transfer vectors to promote the cell metabolism, growth, proliferation, and differentiation, remove the free radicals and harmful substances, and improve the skin problems such as dull and yellow skin color, dryness, wrinkles, skin allergy, and the like.

The invention relates to an aqueous zinc ion battery and a preparation method and application thereof. A birnessite/carbon composite cathode active material is synthesized by a co-precipitation method. Metal zinc powder is used as an anode active material, and a zinc sulfate-water-urea mixed solution is used as an electrolyte. A pole piece is prepared by using a slurry method. A battery cell is prepared by a winding method. The battery is prepared by a conductive adhesive bonding method. In the method, a carbon material and the birnessite are synthesized in situ. The battery prepared by the method can suppress the dissolution of the cathode material Mn. The urea-modified electrolyte can suppress the generation of dead zinc and zinc dendrites and extend the battery cycle life. A nylon net or chinlon net cathode current collector can reduce the cost and increase the energy density of the battery. A conductive adhesive bonding bus bar can prolong the battery life. The method of the invention is suitable for pilot scale-up production. The battery of the invention can be used as an electric bicycle power battery.

The invention discloses a reducing roasting method for powdered iron ores in a tunnel kiln, which is designed for solving the problems of low heat transfer efficiency, long reducing time, non-uniform material reduction quality, and the like when powdered iron ores are subjected to reducing roasting in a tunnel kiln. According to the invention, by reasonably selecting the particle size range and distribution of iron ores, iron ores with different particle sizes and reducing coal are mixed and distributed in layers, and then the obtained object is subjected to reducing roasting, so that the iron ores with different particle sizes achieve a same roasting effect, thereby increasing the metal recovery rate of roasted iron ores, improving the quality of roasting, shortening the roasting time, reducing the roasting temperature, and lowering the production cost.

A rack guide mechanism includes: a housing; a rack guide housed in the housing so as to move freely, supporting a rack shaft; a lid member attached to the housing; and an elastic member interposed between the rack guide and the lid member, biasing the rack guide to the rack shaft, in which the elastic member includes a first elastic portion constantly sandwiched between the rack guide and the lid member, and a second elastic portion sandwiched between the rack guide and the lid member when the rack guide moves to the lid member side by a given distance, and the first elastic portion and the second elastic portion are integrally formed.

The invention discloses a liquid-phase preparation method of a high-oriented vanadium dioxide film, belonging to the field of chemical function materials. The preparation method comprises the following steps: preparing precursor liquid by taking triisopropoxyvanadium oxide as solute, coating a sapphire substrate with the obtained precursor liquid to prepare a precursor film, and finally sintering the precursor film in a vacuum environment. According to the preparation method, the vanadium dioxide film is prepared by controlling vacuum sintering conditions on the basis of a liquid-phase method, the obtained film is good in growth orientation, the phase change temperature of the film is about 60 DEG C, and the change of electrical resistivity before and after the phase change is more than three orders of magnitude; in addition, the preparation process is simple and suitable for large-range popularization.

A semiconductor device production method that is used to uniformly and efficiently reduce metal oxides produced on metal (copper, for example) which forms electrodes or wirings on a semiconductor device. An object to be treated on which copper oxides are produced is put into a process chamber and is heated by a heater to a predetermined temperature. Then carboxylic acid stored in a storage tank is vaporized by a carburetor. The vaporized carboxylic acid, together with carrier gas, is introduced into the process chamber via a treating gas feed pipe to reduce the copper oxides produced on the object to be treated to metal copper. As a result, metal oxides can be reduced uniformly without making the surfaces of electrodes or wirings irregular. Moreover, in this case, carbon dioxide and water are both produced in a gaseous state. This prevents impurities from remaining on the surface of copper.

The invention provides a method for improving the grade of low-grade iron ore. The method comprises the following steps: respectively pretreating low-grade iron ore and coal, adding coal dust and an additive according to a certain proportion and preparing small balls with particle sizes of 3 to 8 mm by using a disc or drum balling machine after the content of treated iron ore and coal with a particle size of 0.074 mm is more than 50%, wherein clay minerals in the low-grade iron ore are used as a binder, or a small amount of binders like bentonite is added and uniformly mixed with treated iron ore and coal; and drying the prepared balls with a belt or cylindrical dryer, carrying out reduction by using a rotary kiln and then successively carrying out cooling and magnetic separation so as to obtain high-grade iron ore concentrate. With the method, low-grade iron ore can be effectively treated, the high-grade iron ore concentrate is obtained through granulation of the coal and the additive, direct reduction and magnetic separation, and the characteristics of energy conservation, high efficiency and rapidness are obtained.

The invention relates to a skin anti-ageing composition, in particular to a skin care product containing kinds of biological factors, and belongs to the fields of cosmetics and biotechnologies. Every10 ml of composition is composed of, by content, 5-40 mg of transparent hyaluronic acid, 50-400 mg of hydrolyzed collagen, 1-5 ml of mesenchymal stem cell secretion, 1-5 ng of EGF, 1-8 ng of b-FGF1 and 10 ml of sufficiently-supplemented purified water. The skin anti-ageing composition has the advantages that a formula is safe and effective, there are no allergic substances and preservative, ageingresistance and wrinkle removal are effective, the premature ageing of the skin is improved greatly, meanwhile, it is avoided that nutrition excess makes the skin burdened, and new skin problems appear, and the skin anti-ageing composition is particularly suitable for allergic skin.

The invention discloses a system and a method for vanadium titano-magnetite fluidization oxidation and reduction. A four-section fluidized bed is adopted to carry out fluidization oxidation and reduction on vanadium titano-magnetite fine ore; and a fluidized bed reaction body is formed by boiling beds connected in series. Through the technological design of a pre-oxidation treatment and low-gas-velocity reaction fluidized bed, the vanadium titano-magnetite powder fluidization performance can be obviously improved, the reaction efficiency is improved, and the process energy consumption is reduced. The vanadium titano-magnetite fine ore is firstly preheated and dried, enters a low-temperature oxidation bed so as to be subjected to oxidation treatment, then enters a prereduction bed so as to be subjected to prereduction, and finally complete final reduction through a two-stage high-temperature final reduction bed; oxidization tail gas is used for preheating and drying the vanadium titano-magnetite fine ore; after reduction tail gas is heat-exchanged with oxidization air, oxidization components are cleaned and removed, and the reduction tail gas is recycled; and a gas utilization scheme has the advantages of high reaction efficiency and high energy utilization ratio.

The invention discloses a preparation method of a Sb<2>Se<3> composite material used for a lithium-sulfur battery diaphragm. According to the method, rod-like Sb<2>Se<3> is introduced to be used as asupporting framework of a graphene lamination layer, and a coating material structure is modified; Sb<2>Se<3>-pvp and graphene oxide are mixed at a certain proportion, and graphene oxide is reduced through hydrazine hydrate to obtain a dispersion liquid of the Sb<2>Se<3>-pvp and reduced graphene oxide; the dispersion liquid is subjected to spray drying to obtain solid powder, and then the solid powder is glued with a Celgard2400 diaphragm through a binder to prepare a Sb<2>Se<3>-pvp-rGO composite material diaphragm. The electrochemical performance of the lithium-sulfur battery is improved through a simple, convenient and low-cost method.