161results about How to "Good microscopic appearance" patented technology

The invention relates to a self-standing TiO2 nanotube array membrane and a preparation method thereof. The preparation method comprises: a), performing the primary anodic oxidation of a titanium foil, and forming a TiO2 nanotube array membrane on the titanium foil; b), annealing and crystallizing the titanium foil obtained by the processing of the step a); c) performing the secondary anodic oxidation of the processed titanium foil, and forming an amorphous oxide layer with a certain thickness between the titanium foil and the TiO2 nanotube array membrane; and d) stripping the TiO2 nanotube array membrane from the amorphous oxide layer. Meanwhile, the invention also provides a preparation method of the self-standing TiO2 nanotube array membrane and a dye-sensitized solar cell prepared by using the membrane. The self-standing TiO2 nanotube array membrane of the invention is flat in a large area and can be used for constructing an element such as the dye-sensitized solar cell based on the TiO2 nanotube array membrane conveniently.

The invention relates to a preparation method of a double sizing agent modified carbon fiber reinforced epoxy resin based composite. According to the preparation method, through multi-layer modification of an OA-POSS mixed SiO2 sizing agent and a CNT sizing agent, introduction of complicated chemical bonds is avoided, grafting modification is performed on carbon fiber surfaces, and the modified carbon fiber reinforced epoxy resin based composite is obtained through curing at the normal temperature by use of a vacuum assisted forming process. The shearing performance of the composite is improved by 24%, the tensile property of the composite is improved by 29%, which are both higher than the mechanical properties in a thermosetting molding process.

The invention discloses a lithium-rich manganese-based anode material, a preparation method thereof and a lithium ion battery containing the anode material. A chemical formula of the lithium-enrichment manganese-based anode material is Li1+xMnyMzAwOr, wherein the M is at least one of Ni, Co, Al, Mg, Ti, Fe, Cu, Cr, Mo, Zr, Ru and Sn; the A is at least one of S, P, B and F; the x is larger than 0 and smaller than or equal to 1, the y is larger than 0 and smaller than or equal to 1, the z is larger than or equal to 0 and smaller than 1, the w is larger than or equal to 0 and smaller than or equal to 0.2, and the r is larger than or equal to 1.8 and smaller than or equal to 3. The lithium-enrichment manganese-based anode material is prepared by methods of oxalate coprecipitation, spray drying and high-temperature roasting. The lithium-enrichment manganese-based anode material disclosed by the invention overcomes agglomeration of a material prepared through an oxalate coprecipitation method; a prepared material is controllable in particle size, meets requirements of engineering indexes and can achieve the purpose that transition metal ions are evenly mixed at an atom level; the particle size of the prepared lithium-enrichment manganese-based anode material is 3 to 25mu m, and the lithium-rich manganese-based anode material has good rate capability and circulation performance at the same time; furthermore, the lithium-enrichment manganese-based anode material has the advantages of simple preparation technology, low cost and wide application prospect.

The invention discloses a method for preparing an aluminum nitride electronic ceramic base plate by using a tape casting method. The method comprises the following steps: preparing tape casting slurry, and molding the tape casting slurry by using the tape casting method, thereby obtaining the aluminum nitride electronic ceramic base plate, wherein the tape casting slurry comprises a benzene-free mixed organic solvent, aluminum nitride ceramic powder and sintering aids; the benzene-free mixed organic solvent comprises three or more than three of absolute ethyl alcohol, isopropyl alcohol, n-butyl alcohol, triethyl phosphate and dibasic acid ester; and the solvent accounts for 28-40% of the mass of the aluminum nitride ceramic powder. The invention further provides a method for preparing high-solid content aluminum nitride tape casting by using an organic solvent which is non-toxic, relatively environmentally friendly and low in cost. The aluminum nitride electronic ceramic base plate which is high in density, uniform in microstructure and high in heat conductivity is prepared under a relatively low high temperature condition, and the tape casting production process is green and environmentally friendly and applicable to industrial popularization.

The present invention provides a pretreatment method for a biomass fiber material. The method comprises: mixing a surfactant, an cosurfactant and a oil phase, then stirring; adding a water phase material to the resulting mixture when no bubble is generated during stirring to obtain clear and transparent composite microemulsion; mixing a preprocessed biomass fiber material and the composite microemulsion according to a certain solid-to-liquid ratio, controlling a temperature to 30-120 DEG C and controlling pressure to 0.1-2.0 Mpa; carrying out washing through clear water after completing the reaction, wherein the resulting solid is the pretreated biomass fiber material. According to the present invention, the composite microemulsion is adopted for treating the biomass, such that the crystallization characteristic of the biomass fiber is changed, the specific surface area and the accessibility of the enzyme solution are increased, the pretreatment effect is improved; the used chemical drugs has characteristics of easy recovery and utilization and low environmental pollution; the reaction is performed at the low temperature under the low pressure so as to reduce the cost and the energy consumption of the pretreatment process.

The invention discloses a preparation method of a compact composite coating layer based on reactive plasma spraying and laser remelting, relates to a surface treatment method, and in particular, relates to the preparation method of the compact composite coating layer based on reactive plasma spraying and laser remelting. The method aims to solve the problem of compactness of an in-situ endogenouscoating layer prepared by a reactive plasma spraying method in the prior art. The method comprises the steps: 1, mixing powder, deionized water, ammonium citrate and Arabic gum to obtain slurry, and carrying out spray granulation on the slurry to obtain mixed spray powder; 2, carrying out sand blasting treatment on the surface of a base body, cleaning and drying; 3, filling a plasma spray gun withthe mixed spraying powder, and spraying the mixed spraying powder on the base body obtained in the step 2 to obtain a coating layer; and 4, mounting a coating layer test piece on a workbench of a laser device, and carrying out laser remelting. According to the method, the microstructure of the coating layer can be improved, a uniform and compact laser remelting layer is formed, and the quality ofthe coating layer is effectively improved. The method is applied to the field of surface pretreatment.

The invention provides a rare-earth alloy. Elements Mg and Si co-fine a strengthening phase Mg2Si in an ageing thermal treatment process, so that dislocation motion is effectively inhibited and the effect of strengthening a base body is achieved; Al-Ti-B and rare-earth elements are added to form a heterogeneous nucleation core with relatively low mismatching degree with an alpha-Al substrate lattice for performing grain reinforcement on the aluminum alloy, and impurities in the aluminum alloy are purified; elements Cr and Mn are added to inhibit growth advantages in single direction of a needle-like Fe phase, so that the needle-like Fe phase changed into a Chinese character shaped or granular Fe-containing phase; elements Sr and Ca are introduced to introduce eutectic silicon to form high-density twin crystal, so that optimization of the morphology of eutectic silicon is realized. Elements mutually act, so that a base phase alpha-Al, eutectic silicon and a Fe phase of the alloy have excellent microscopic morphology, and thus, the purposes of strengthening the alloy, refining the crystal grains and optimizing the structure morphology are achieved, and a rate of elongation of the alloy is remarkably increased.

The invention discloses long-service-life concrete for a steel-concrete composite beam hogging moment area and a preparation method of the long-service-life concrete, and relates to the field of long-service-life concrete preparation. The long-service-life concrete comprises, in parts by mass, 456-520 parts of a cementing material, 1748-1813 parts of aggregates, 0.80-1.50 parts of imitation steel fibres, 2.05-2.86 parts of a toughening material, 4.10-5.72 parts of a water reducer and 142-148 parts of water; the 28-d compressive strength of the long-service-life concrete is not less than 69.0MPa, the 28-d breaking strength of the long-service-life concrete is not less than 7.0MPa, the 28-d splitting tensile strength of the long-service-life concrete is not less than 5.0MPa, the 28-d elasticity modulus of the long-service-life concrete is not less than 36.0GPa, the 56-d chloride ion diffusion coefficient of the long-service-life concrete is less than 4.0*10<-12>m<2> / s, the cracking resistance rank of the long-service-life concrete achieves L-IV rank, and the 28-d bend ductility index I20 of the long-service-life concrete is not less than 8. The flexural strength, bend ductility and crack resistance of the long-service-life concrete are high, the fragility of the concrete is changed, and the concrete is good in structure durability, long in service life, low in cost, and convenient to massively use.

The invention discloses an ultrasonic grinding device for a gear. The ultrasonic grinding device comprises a rotary hollow shaft and a fixed base. The rotary hollow shaft is mounted in a penetrating hole in the fixed base in a sleeved mode, the rotary hollow shaft and the penetrating hole are rotationally connected, and one end of the rotary hollow shaft is fixedly connected with a connecting flange of an amplitude-change pole. A gear workpiece is fixed to the small end of the amplitude-change pole. The large end of the amplitude-change pole is located in the rotary hollow shaft and sequentially and fixedly connected with a vibration transmission pole, piezoelectric ceramic and an electrode slice. The piezoelectric ceramic and the electrode slice are connected with an ultrasonic generatorthrough an electric conduction mechanism. The other end of the rotary hollow shaft is connected with a rotary indexing device or a variable frequency motor. According to the ultrasonic grinding device, a gear ultrasonic vibration technology and a gear forming grinding technology are combined, ultrasonic grinding of the gear is achieved, the service life of a grinding wheel can be prolonged, the roughness of a tooth face is reduced, the machining precision of the gear is improved, the microscopic morphology of the tooth face is improved, and accordingly the anti-fatigue ability of the gear is improved.

The invention discloses a composite material function modification method based on co-curing and reaction inductive phase separation. Thermosetting resin serves as the carrier, thermoplastic resin serves as second-phase modified thermosetting resin, electric conduction and heat conduction nanoparticles serve as the function phase, a co-curing molding process is adopted, and based on the reaction inductive phase separation technology, a carbon fiber composite laminated plate which is provided with a surface function layer is prepared. Through the method, the low-cost and multi-functional carbon fiber composite laminated plate is obtained, and the design and preparation of a composite material by way of integration of structure and function are achieved.

The invention provides a method for regulating and controlling the microstructure of an oxide electrode in the working period of a fuel cell, and relates to a method for regulating and controlling the microstructure of the oxide electrode. The method aims at solving the technical problems that material and manpower resources are greatly wasted and the preparation cost is increased due to the reduction of the effective reaction area and the internal porosity of the electrode as well as bad influence on the reaction process of the electrode caused by particle aggregation as the existing methods for regulating and controlling the microstructure of the oxide electrode are all implemented in the preparation process of the electrodes and each electrode needs to be sintered at high temperature. The method comprises the steps of firstly, connecting the fuel cell with an electrochemical workstation and heating, and secondly, performing anodic polarization treatment on the working electrode at high temperature, and cooling to room temperature. The method is mainly applied to control of the microstructure of the oxide electrode of the fuel cell.

The invention discloses an autoclaved prestressed concrete tube pile applied to a marine work environment and a preparation method thereof. A coating layer is coated on the surface of a tube pile; a gel material consists of P.II52.5 silicate cement and a mineral admixture; the using amount of gel material is 450 to 550kg / m<3>; the using amount of mineral admixture is 30 to 50wt percent that of gel material; the admixture amount of I-level coal ash is 0 to 30wt percent that of gel material; the admixture amount of II-level coal ash is 0 to 25wt percent that of gel material; the admixture amount of ultra-fine coal ash is 0 to 20wt percent that of gel material; the admixture amount of S95-level mineral powder is 0 to 25wt percent that of gel material; the weight ratio of water and gel is 0.22 to 0.24; the water reducer is prepared by aliphatic series and polycarboxylic acid and the ratio is 1 to 2, the using amount of the water reducer is 2.1 to 2.3 wt percent of gel material; the coating layer consists of a primer, a middle paint and a finish paint; the thickness of the coating layer is 125 to 150 microns. The proportions of raw materials and parameters in a preparation process are optimized, and the specific coating layer is coated on the surface, so that the compressive strength and chlorine salt erosion resistance of the tube pile are greatly improved, the rusting risk of the tube pile is greatly reduced, and the service life of the tube pipe in the marine work environment can be greatly prolonged.