35results about How to "Uniform shape distribution" patented technology

The invention relates to a method for preparing a self pore-forming calcium phosphate cement bracket, which comprises the following steps of: 1) uniformly mixing calcium sulfate hemihydrate and tricalcium phosphate cement powder to obtain the mixed cement powder; 2) heating gelatin and NaH2PO4 with stirring in water at the temperature of between 45 and 50 DEG C until the gelatin and the NaH2PO4 are dissolved completely to obtain mixed solution; 3) uniformly mixing the mixed cement powder obtained by the step 1) and the solution obtained by the step 2), adding 25 to 50 percent aqueous solution of glutaraldehyde immediately, injecting the mixed cement powder slurry into a steel mould, then mixing the slurry at room temperature for 60 to 90 seconds, keeping the temperature of the slurry to be 37 DEG C after taking out, and then curing the slurry for 1 to 2 hours under the condition that the humidity is 100 percent to obtain the composite bracket. When the porosity is 71 percent, the average value of the compression strength can be increased to 8.1MPa; the bracket has high porosity and compression strength, and plays a better role in supporting in a human body, and the macropore diameter is between 100 and 300 mu m; and the self pore-forming calcium phosphate cement bracket prepared by the invention can be used as a repairing material of a human hard tissue.

The invention relates to a preparation method and application of a photocatalyst, copper calcium titanate containing high-density oxygen vacancy. The preparation method includes: utilizing a one-step molten salt method; controlling morphology and oxygen vacancy content by changing molten salt composition during synthesis; using metal oxide as a raw material; grinding and calcining the raw material to form a high-purity photocatalyst; calcining before washing the high-purity photocatalyst. The preparation method has the advantages of few raw material type, simple operation, adjustable molten salt composition, mild condition and simple process. A copper calcium titanate photocatalysis material obtained by the preparation method is high in yield, uniform in distribution and free of introduction of other mixed elements; by introducing oxygen vacancy, compositing of photo-induced electron hole pairs can be inhibited effectively, and the material is endowed with excellent visible light photocatalysis performance and is better than a commercial star photocatalysis material, titanium dioxide (P25). The defect that visible light cannot be used due to wide oxide band gap is overcome, and the defect that sulfide is unstable is made up due to the characteristic that the catalyst is of a diamond-like structure.

The invention discloses a preparation method of a flame retardant of environment-protective fiberglass retardant nylon. At first, diammonium phosphate, phosphorus pentoxide, carbamide and a multi-amino group compound are added into a kneader according to a proportion and are reacted for 4 to 12 hours under an ammonia atmosphere to obtain modified APP; then the APP is dispersed in solvent and cation surface activator is added to carry out ion exchange reaction with cyanamide salt for 1 to 10 hours under the situations of micro-boiling and circumfluence of the solvent; after the reaction is finished, the nitrogen-phosphor flame retardant used for nylon is obtained after the reagent is cooled, filtered, washed and dried. The flame retardant prepared by the invention has more uniform chemical components, better thermal stability, more excellent compatibility with nylon as well as more excellent flame retardant performance and more reasonable price. No corrosive and poisonous compounds are generated during the use process of the flame retardant. The product prepared by the invention is mainly used as the flame retardant of fiberglass reinforced retardant nylon and fiberglass reinforced retardant polyester.

The invention provides a spherical nickel cobalt aluminum precursor, and belongs to the field of a positive electrode material of a lithium ion battery. The spherical nickel cobalt aluminum precursoris formed by radially grown prisms and has a radial pattern spherical appearance; the spherical nickel cobalt aluminum precursor has the chemical components of [a(Ni<x>Co<y>C<2>O<4>)].bAl(OH)<3>, wherein x is greater than or equal to 0 and less than or equal to 1, y is greater than or equal to 0 and less than or equal to 1; a x is greater than 0 and less than or equal to 1; b x is greater than orequal to 0 and less than 1; a+b is equal to 1; the spherical nickel cobalt aluminum precursor is 8-50 [mu]m in grain diameter; and the prism main phase is nickel cobalt oxalate and the surface is loaded with aluminium hydroxide granules. The scanning electron microscope analysis proves that the spherical nickel cobalt aluminum precursor provided by the invention has the radial pattern spherical appearance and is formed by the radially grown prism, with uniform dimension and appearance distribution and regular and tidy spherical structure; and the specific capacity of a nickel cobalt aluminum positive electrode material prepared from the spherical nickel cobalt aluminum precursor provided by the invention can reach 160 mAh.g<-1> and has relatively high cycle performance.

The invention provides a simple synthetic method for Ag2S-MoS2 sheet self-assembling composite spherical power and relates to the technical field of photocatalytic material preparation. The method comprises the following steps: dissolving amino acid, ammonium molybdate tetrahydrate, thiourea, silver nitrate and ammonium metavanadate in water and uniformly stirring and mixing; transferring the stirred mixed solution into a reaction kettle; covering the reaction kettle and placing into a constant-temperature airing oven for reacting; treating after ending the reaction, thereby acquiring black Ag2S-MoS2 sheet self-assembling composite spherical power. According to the invention, an amino acid auxiliary hydrothermal method is adopted for successfully acquiring the Ag2S-MoS2 sheet self-assembling composite spherical power; a series of experimental results prove that different amino acids as the templates and raw materials can be used for successfully preparing the Ag2S-MoS2 sheet self-assembling composite spherical power; the Ag2S-MoS2 sheet self-assembling composite spherical power has the characteristics of narrow size distribution, uniform morphological distribution, controllable grain size, and the like.

The invention provides a preparation method of particle self-assembled TiO2/Fe2O3 chain-like compound powder and relates to the technical field of preparation of magnetically loaded titanium dioxide. According to the preparation method, a titanium source, soluble iron salt and glycine are used as reaction raw materials and are subjected to hydrothermal reaction to prepare the particle self-assembled TiO2/Fe2O3 chain-like compound powder. The preparation method comprises the following steps: dissolving the titanium source into ethanol and adding the soluble iron salt, the glycine and water; after uniformly mixing, conveying a mixture into a reaction kettle and carrying out hydrothermal synthesis reaction; after reacting, carrying out post-treatment to obtain the product. A titanium dioxide loaded magnetic compound chain-like material is successfully obtained through a glycine biomolecule assisted hydrothermal method. A series of experiment results show that the glycine is used as a template and the raw materials, so that the magnetic titanium dioxide nano chain-like compound powder can be successfully prepared; the magnetic titanium dioxide nano chain-like compound powder has the characteristics of relatively narrow particle size distribution, uniform shape distribution, controllability and the like.

The invention discloses a preparation method for a regular-hexagonal-prism-shaped magnesium-doped zinc oxide film. The microstructure of the magnesium-doped zinc oxide film is in the shape of a regular hexagonal prism, and possesses the advantages that the crystallization degree is high and surface defects are less. The preparation method of the film comprises separately dissolving zinc acetate, magnesium acetate, triethanolamine and ammonia water in a mixture of glycol and ice water, getting proper amount of the solution and a cleaned substrate, transferring into a teflon inner container of a hydrothermal kettle for hydrothermal reaction, after the reaction is finished, performing washing, drying and annealing processing on the substrate, so as to prepare a layer of the regular-hexagonal-prism-shaped magnesium-doped zinc oxide film on the substrate. The preparation method is simple in technology, good in repeatability, low in cost, strong in controllability, low in synthesis temperature, green and friendly to environment. The obtained product is in the shape of a regular hexagonal prism, is good in crystallinity, high in purity, less in surface defects, uniform in morphology distribution and consistent in orientation, and possesses potential application prospect and scientific research value in the fields of photoelectric materials new energy.

The invention discloses a SbPO ₄ The preparation method and application of the microspheres include the following steps: under magnetic stirring, dissolve the ionic liquid ([BMIM]P) in 15 mL of deionized water, and stir for 10 min to completely dissolve it. Under magnetic stirring, 0.002mol SbCl ₃ Dissolve in the solution prepared above, and stir for 30 minutes to obtain a precursor. The precursor was transferred to the reaction kettle, the volume filling volume of the precursor was 80%, the kettle was sealed and placed in an oven at a constant temperature for reaction. After the reaction, wash with absolute ethanol and deionized water three times respectively, and finally dry at constant temperature at 70 °C for 12 h to obtain SbPO ₄ Microspheres. SbPO prepared by the present invention ₄ The distribution of microspheres is even, and it has good ultraviolet photocatalytic activity. The preparation raw materials are green and pollution-free, the preparation process is simple, the reaction time is short, and the reaction conditions are mild, so it has a wide application prospect.

The invention discloses a preparation method of a MoO2/Mo4O11 hybrid-phase nanometer electrode material. The preparation method comprises the step s of 1) dissolving a molybdenum source in an enough amount of alcohol-water mixed solvent according to a formula ratio, performing full stirring, and adjusting pH to 1-5 with an oxidization oxygen-containing acid; 2) performing solvothermal reaction onthe product, wherein the reaction temperature is 90-150 DEG C, and the reaction time is 6-24 hours; 3) cooling, washing and drying the product after reaction is completed; and 4) placing the product under an inert atmosphere of 500-800 DEG C for thermal processing for 1-3 hours to obtain a target product MoO2/Mo4O11. The invention also discloses the MoO2/Mo4O11 hybrid-phase nanometer electrode material. The material has conductivity similar to metal, the theoretical capacity of two phases is considerable, and the lithium ion battery electrode has great advantage. The method is simple to operate, and the prepared product is uniform in morphology distribution.

The invention discloses a preparation method of a nickel tungsten phosphide-nickel tungsten oxide with a heterostructure, which relates to the field of catalytic electrodes for energy conversion. The nickel tungsten phosphide-nickel tungsten oxide with the heterostructure is prepared on foamed nickel by adopting a hydrothermal method and a tubular furnace phosphating method. When water is electrolyzed in an alkaline medium, the material with the heterostructure shows excellent electro-catalytic hydrogen evolution performance and cycling stability as a cathode material, the current density of 10 mA/cm<2> can be reached only by 115 mV overpotential, and the hydrogen evolution catalytic activity of the material can be comparable with that of a noble metal platinum group catalyst. The heterostructure nickel tungsten phosphide-nickel tungsten oxide designed from the microscopic level is low in synthesis cost and simple and convenient in process, and has a good application prospect in the aspects of replacing a noble metal catalyst and large-scale implementation of hydrogen production by water electrolysis.

The invention belongs to the technical field of lithium ion battery materials, and particularly relates to a cobalt-free high-nickel positive electrode material and a preparation method thereof. The method comprises the following steps: preparing a soluble salt solution of coating layer metal, adding a complexing agent, adjusting the pH value, adding a cobalt-free high-nickel positive electrode material matrix, carrying out chemical plating reaction, and carrying out solid-liquid separation, drying and calcining to obtain the cobalt-free high-nickel positive electrode material. According to the invention, a chemical plating reaction method is adopted for coating, the anode material subjected to one-time sintering enters a container for chemical reaction to form a metal compound, so that the surface is coated with a layer of compact metal oxide. Compared with the prior art, the method is advantageous in that: the high-temperature coating or precipitation method coating effect is good, the coating uniformity of chemical plating reaction is stronger, and the cycling stability of the material is better.

The invention discloses a heat-insulating ultraviolet-resistant glass sticker film and a preparation method therefor. The preparation method comprises the steps: S1: dispersing a salicylate compound and PET resin into an aqueous solution of ethanol, so as to form a coating solution; S2: adding metal oxide solid particles into a fluidized-bed reactor, and introducing coating solution entrained supercritical carbon dioxide fluid to coat surfaces of the metal oxide solid particles with the salicylate compound and the PET resin, so as to obtain modified metal oxide solid particles; and S3: uniformly mixing the modified metal oxide solid particles, a couplant, additives and PET to form a casting solution, and pouring the casting solution into a mold, thereby obtaining the glass sticker film. According to the preparation method for the glass sticker film, disclosed by the invention, the heat-insulating and ultraviolet-resistant properties of the glass sticker film are improved, the global performance of the glass sticker film can be more uniform, the service life of the glass sticker film is prolonged, and thus, large-scale popularization and application are better facilitated.

The invention discloses a preparation method of porous BiOCl/g-C3N4 heterogeneous nano-powder, and relates to the technical field of composite materials suitable for new energy and environmental sewage remediation. The preparation method comprises the following steps: putting urea or melamine into a quartz boat tightly wrapped by tinfoil, putting the quartz boat into a tubular furnace, carrying out a reaction, washing, and drying to obtain faint yellow porous g-C3N4 nano-powder; and ultrasonically dispersing a certain amount of g-C3N4 powder into a solvent to obtain a g-C3N4 turbid liquid, sequentially adding a certain amount of bismuth nitrate pentahydrate and potassium chloride into the g-C3N4 turbid liquid, continuously carrying out an ultrasonic reaction on the mixture of the g-C3N4 turbid liquid, the bismuth nitrate pentahydrate and the potassium chloride, and carrying out post-treatment to obtain faint yellow porous BiOCl/g-C3N4 heterogeneous nano-powder. According to the invention, the porous BiOCl/g-C3N4 heterogeneous nano-powder is successfully obtained by combining tubular furnace pyrolysis with an ultrasonic in-situ precipitation method, and has the characteristics of narrow particle size distribution, uniform morphology distribution, controllable particle size and the like.

The invention provides a preparation method of ultrathin chalcogenide glass. The preparation method comprises the following steps: prefabricated ultrathin chalcogenide glass with an average thickness D is provided; the prefabricated ultra-thin glass is fixed on a lifting device of a wire drawing tower, and the prefabricated ultra-thin glass is put into a wire drawing cavity, so that the lower part of the prefabricated ultra-thin glass is aligned with the center of a heating area of the wire drawing cavity; the temperature in the wire drawing cavity is a preset temperature T1, the prefabricated ultra-thin glass product is heated and softened, and the preset temperature T1 meets the condition that T1 is larger than Tg and smaller than Tx; the temperature of the heating area of the wire drawing cavity is kept at the preset temperature T1, and the prefabricated ultra-thin glass descends relative to the heating area of the wire drawing cavity through a lifting device of the wire drawing tower; in the descending process of the prefabricated ultra-thin glass, the heated and softened ultra-thin glass part leaves the heating area of the drawing tower and is cooled and annealed to the room temperature, and a chalcogenide ultra-thin glass product with the average thickness d is obtained. According to the preparation method, the defects of a micron-level ultrathin chalcogenide glass forming method in the prior art are overcome, and better flexibility and controllability are achieved.

The invention discloses a ceramic bullet-proof sheet and a preparation method thereof. The ceramic bullet-proof sheet is prepared from the following raw materials in percentage by mass: 94 to 96 percent of silicon carbide, 2.8 to 3.2 percent of maltodextrin and 1.8 to 2.2 percent of boron carbide. The ceramic bullet-proof sheet is prepared by the steps of weighing the raw materials according to the proportion, adding process water and completely mixing to obtain slurry, feeding the slurry into a pelletizing tower, performing spray pelletization to form granules, performing coarse and fine granule separation by a circular vibration sieve, putting the granules into a debugger, debugging the water content, pressing the granules by a press to form a bullet-proof sheet blank with the required specification, performing turning processing, putting into a non-pressure sintering furnace to sinter, grinding the plane and the vertical plane of the ceramic piece by grinding and milling equipment after sintering formation, and polishing to obtain the ceramic bullet-proof sheet with the required size and precision. The product provided by the invention is simple in burdening, adopts only two auxiliary materials, and is small in use amount and low in raw material cost; the production process has high controllability, parameters can be adjusted at any time, the product granularity and shape are distributed uniformly, the product has high hardness, small specific gravity and high ballistic performance, energy consumption in the production process is low, and the finished product ratio is high.