554results about How to "The preparation process is simple" patented technology

The invention relates to the field of powder metallurgy technology characterized in that, forming the powder with 200 MPa-500 MPa and feeding into sintering furnace, elevating the temperature to 400-700 deg. C. at the speed of 5-20 deg. C per minutes, heat preserving for 15-120 mins, elevating the temperature to sintering temperature of 1150-1350 deg. C. at the speed of 20-60 deg. C per minutes, heat preserving for 30-120 mins.

The invention belongs to the field of high polymer materials, and discloses a composite fiber containing aggregation-induced luminescent molecules, a preparation method thereof and an application thereof. The preparation method of the composite fiber comprises the steps of adding aggregation-induced luminescent molecules into a high polymer material solution or a solution of a high polymer material and a carrier, uniformly mixing the solution, and preparing the composite fiber through the electrostatic spinning process. The composite fiber containing aggregation-induced luminescent molecules has multiple types of AIE, and is strong in fluorescence intensity. Therefore, the composite fiber can meet the requirements of different fluorescent staining operations. The preparation method provided by the invention is simple, high in production efficiency, and good in repeatability. The composite fiber containing aggregation-induced luminescent molecules can be applied in the fields of cell positioning and imaging, fiber microstructure observation, fiber drug loading and the like.

The invention discloses a composite solid-state polymer electrolyte and an all-solid-state lithium battery. The composite solid-state polymer electrolyte comprises organic micro-nano porous granules, a polymer having lithium ion conducting capability and a lithium salt; the composite solid-state polymer electrolyte takes the organic micro-nano porous granules as filler; and natural compatibility exists between the organic filler and the polymer matrix. The composite solid-state polymer electrolyte disclosed by the invention has high electrochemical window (4.2-5V), excellent interface stability with a lithium-based negative electrode material, and low interface impedance. The all-solid-state lithium battery, assembled by the composite solid-state polymer electrolyte disclosed by the invention, is high in cycling performance and rate capability.

On the basis of the current situation of self-repairing polyurethane materials, the invention provides an aromatic terminal hydroxyl chain extender containing an acylhydrazone bond, self-repairing polyurethane prepared by using the aromatic terminal hydroxyl chain extender and a preparation method of the self-repairing polyurethane. Compared with dihydric alcohol containing an acylhydrazone bond, the aromatic terminal hydroxyl chain extender containing the acylhydrazone bond has the advantages that the molecular structure of the aromatic terminal hydroxyl chain extender has the large pi bond of a hydrazide benzene ring and the pi-pi conjugative effect of the pi bond of carbon-oxygen double bonds, and accordingly the chain extender is stable in structure. The prepared self-repairing polyurethane has the advantages that the molecular chain of the polyurethane contains the reversible acylhydrazone bond, can achieve self-repairing under room temperature, and is high in repairing efficiency and good in mechanical performance. The preparation of the self-repairing polyurethane has the advantages that the method is simple, raw materials are products which are commercially produced, and the prepared polyurethane is high in performance controllability and promising in application prospect.

The invention discloses a preparation method for a reticulate structural part provided with component and pore double gradient transition layers. The method comprises the following steps that (1) a three-dimensional model of a reticulate structure with bionic unit topology and gap dimension gradient changes is design, the three-dimensional model is subjected to slicing treatment and then converted into an STL document, and the STL document is input into SLM forming equipment; (2) various powders are evenly mixed according to a preset ratio, and a mixed powder is fed and laid; (3) a current slice layer of the reticulate structural part is subjected to laser scanning forming and is descended by the thickness of a laid power layer after forming is finished, and then the mixed powder in the current ratio is adopted for forming the next slice layer; (4) the step (3) is repeated until forming of the layers with the set height is completed through the powder in the current ratio, mixing of powder in another ratio is completed, and powder feeding and laying are conducted; and (5) the step (3) and (4) are repeated until forming of the whole reticulate structure with various components being in gradient transition is completed. The preparation method has the advantages of being high in preparation efficiency, simple in preparation technological process, low in cost and the like.

The invention discloses a double-layer thermal barrier/high-temperature low-infrared emissivity integrated coating which is of a multilayer superposition structure. The multilayer superposition structure sequentially comprises a metal bonding layer, a thermal barrier ceramic inner layer, a thermal barrier ceramic outer layer and a low-infrared emissivity layer from inside to outside, and the thermal barrier ceramic inner layer is La2Zr2O7-8YSZ mixture layer, wherein the mass fraction of La2Zr2O7 powder in the mixture is not more than 45%, the thermal barrier ceramic outer layer is a rare earthzirconate layer, and the low-infrared emissivity layer is a Bi2O3-Al2O3-ZrO2-CaO-SiO2 glass coating comprising conductive phase AuPt alloy powder. The invention also provides a metal composite material with the coating and a preparation method thereof. The integrated coating has the characteristics of heat insulation performance, high-temperature low infrared emissivity, excellent thermal shock resistance and the like.

This invention relates to a method for preparing high-thermal conductivity foamy carbon material. In this invention, polyoxyethylene, polyvinyl alcohol or polymethylcellulose and distilled water are mixed to obtain the dispersing agent; asphaltum, as the intermediate phase, is added with adulterant particle Ti and mixed; the mixture is then added into said dispersing agent, after ball-milling, drying to obtain doped intermediate phase asphaltum. After that, the same is heated, in protective nitrogen atmosphere, at 450-500deg.C for 2-3hrs, after cooling to obtain asphaltum foam. Then it is heated, under nitrogen protective atmosphere, to 800-1000deg.C, for 1-2hrs, after cooled to room temperature to obtain foamy carbon. Finally, the same is heated to 2500-2800deg.C, under argon atmosphere, for 10-20min, cooled to room temperature to obtain graphite foamy carbon. The advantages of this invention are: simple process, low cost, and high-thermal conductivity.

The invention discloses a method for preparing a Hf0.5Zr0.5O2 ferroelectric film by ALD for ferroelectric memory applications, characterized by preparing the ferroelectric film by using atomic layer deposition, using a hafnium source and a zirconium source as reaction precursors, using ozone or water as an oxygen source, using a cavity temperature of 250 to 280 degrees centigrade, and using a reaction precursor heating temperature of 75 to 80 degrees centigrade. Compared with a ferroelectric film having a perovskite structure obtained by a conventional process, the ferroelectric film preparedby the method is more liable to be compatible with a standard semiconductor manufacturing process, has higher integration, a lower annealing temperature, a higher annealing rate, shorter annealing time, and a lower ferroelectric layer thickness. The film obtained by a high annealing rate heat treatment process has high remanent polarization, a large dielectric constant, and low leakage current. The preparation method of the invention has high repeatability and can obtain uniform ferroelectric film, and contributes to realizing the wide application prospect of the ferroelectric film in the fields of information storage and integrated circuits.

The invention relates to a nanometer bainite spring steel and a preparation method thereof. The spring steel is prepared from, by weight percentage, 0.62%-0.67% of C, 1.6%-2.0% of Si, 0.8%-1.1% of Mn, 0.8%-1.1% of Cr, 0.5%-0.8% of Ni, 0.8%-1.2% of Al, 0.7%-1.0% of W, less than or equal to 0.02% of P, less than or equal to 0.02% of S and the balance Fe and inevitable impurities. The metallographic structure of the spring steel is nanometer bainite; the tensile strength is not less than 1700 MPa; the yield strength is not less than 1200 MPa; the elongation is not less than 10%; and the U-shaped notch impact energy is not less than 49 J. The preparation method comprises the steps of steelmaking, annealing, hot rolling, heat treatment and the like. By means of the nanometer bainite spring steel and the preparation method thereof, the nanometer bainite structure composed of nanoscale lath bainite ferrite and retained austenite can be obtained; no carbide is contained; no quenching stress or quenching crack is generated; strength, plasticity and toughness are high; and good anti-over-loading fracture performance is achieved.

The invention discloses ultra-fine grain ferrite/low-temperature bainite dual-phase steel and a preparation method thereof and belongs to the field of steel and iron material engineering. The grain size of ultra-fine grain ferrite is 0.5-3 microns, and the batten size of low-temperature bainite is 75-300 nm; and the volume content of ultra-fine grain ferrite is 15-75%. According to the dual-phase steel, steel of a tempered troostitic structure is rolled to deform, and then heated and recrystallized to form ultra-fine grain ferrite and fine grain austenite, and the fine grain austenite is manufactured by transforming low-temperature bainite; the ultra-fine grain ferrite/low-temperature bainite dual-phase steel has the advantages of high strength, high plasticity, low yield ratio, high strength and ductility and excellent comprehensive mechanical property; and the preparation technology is simple and feasible in process and easy to control and facilitates industrial production.