9 results about "Amorphous Crystals" patented technology

This application relates to a method for producing disodium 5'-guanylate crystals, comprising a mixing step of adding an aqueous sodium chloride solution to an aqueous solution of disodium 5'-guanylate; a concentration step of concentrating the mixed solution of the aqueous solution of disodium 5'-guanylate and the aqueous sodium chloride solution to precipitate amorphous crystals of disodium 5'-guanylate; and a transition step of adding seeds to the mixed solution of the aqueous solution of disodium 5'-guanylate and the aqueous sodium chloride solution to transform the amorphous crystals of disodium 5'-guanylate into columnar crystals. According to this application, disodium 5'-guanylate crystals can be produced in high yield by an environmentally friendly method without using organic solvents.

[Problem] To provide an atorvastatin calcium anhydride crystal having higher solubility than that of a conventional hydrate crystal and being more stable than an amorphous form. [Solution] The present invention pertains to an atorvastatin calcium anhydride crystal that exhibits an X-ray diffraction pattern, which has peaks at 2θ = 8.7°, 10.4°, 18.1°, 19.5°, 20.9°, 22.5°, 24.1°, and 25.6°, by X-ray powder diffraction measurement (XRPD) using CuKα radiation.

The application discloses a zirconium-based amorphous alloy-titanium alloy composite coating and a preparation method thereof, and belongs to the technical field of preparation of wear-resistant and corrosion-resistant materials.The preparation method comprises the following steps: (1) pretreating a substrate; (2) performing layer-by-layer cladding on the substrate by adopting a laser cladding process to form a gradient-coupled titanium alloy layer; and (3) layer-by-layer spraying a zirconium-based amorphous alloy coating on the surface of the titanium alloy layer by adopting a high-velocity oxygen fuel spraying technology.The load material coating with the gradient structure of the crystal and the amorphous crystal is prepared by adopting the preparation method, so that the titanium alloy layer and the zirconium-based amorphous alloy layer have high interface bonding strength, and the composite coating with more comprehensive performance and excellent performance is obtained.

The invention discloses a preparation method of an iomeprol amorphous substance, which comprises the following steps: adding an iomeprol crude product into a solvent, heating, refluxing and stirring until the iomeprol crude product is completely dissolved, carrying out reflux reaction, cooling, crystallizing and filtering to obtain an iomeprol wet product; the preparation method comprises the following steps: adding an iomeprol wet product into water, stirring until the iomeprol wet product is completely dissolved, and carrying out spray drying at a certain temperature to obtain an iomeprol amorphous substance which has an X-ray powder diffraction pattern and diffraction peak as shown in Figure 1; the amorphous crystal produced by the method is good in stability and has high application value, and the whole process is suitable for industrial and industrial production.

The invention discloses a ferrous silicate catalytic material as well as a preparation method and application thereof, and belongs to the technical field of catalytic materials. The preparation method comprises the following steps: slowly adding a sodium silicate solution into a ferrous sulfate solution at a constant speed, stirring and reacting under a proper pH condition, filtering, washing and drying a reaction product to obtain the ferrous silicate catalytic material, and the obtained ferrous silicate catalytic material has the characteristics of an amorphous crystal phase structure, nano-particle morphology and positive charge on the surface. The adsorbent not only has high adsorption activity on anionic organic pollutants, but also can catalyze peroxides to oxidize and degrade the organic pollutants, so that the degradation rate of the organic pollutants is improved.

The invention discloses a metal-CO2 battery based on a Cu-based nano amorphous alloy catalyst and a preparation method of the metal-CO2 battery, the Cu-based nano amorphous alloy catalyst is a binary or ternary or more nano alloy formed by a main element Cu and one or more alloying elements Cr, Mn and V. The phase structure of the Cu-based nano amorphous alloy catalyst is a long-range disordered amorphous crystal structure. The morphology is irregular spherical nanoparticles. The metal-CO2 battery is prepared on the basis of the Cu-based nano amorphous alloy catalyst, and the catalytic performance of the Cu-based nano amorphous alloy catalyst on CO2 reduction and Li2CO3 decomposition in the charge and discharge process of the metal-CO2 battery is further improved by regulating and controlling the electronic structure and the geometric structure of the Cu-based nano amorphous alloy catalyst. According to the Cu-based nano amorphous alloy catalyst, the discharge voltage in the discharge process of the metal-CO2 battery can be effectively increased, the charge voltage in the charge process can be reduced, the charge and discharge energy efficiency of the metal-CO2 battery can be improved, and the charge and discharge cycle performance can be improved.

The application relates to the technical field of coal chemical adsorbent, and discloses a ZIF-based derived porous carbon-molecular sieve composite material and a preparation method and application thereof. The method comprises the following steps: (1) mixing fly ash and a first alkaline compound for the first time, then calcining the obtained mixture to obtain fly ash chamotte, mixing the fly ash chamotte and an acid solution for the second time and carrying out first solid-liquid separation, and separating a first solid-phase product and a first liquid-phase product; (2) mixing the first solid-phase product, a second alkaline compound and water for the second time and carrying out second solid-liquid separation, then mixing the separated second liquid-phase product and the first liquid-phase product for the third time, and then carrying out a crystallization reaction on the obtained mixture, a salt solution containing sodium elements and an amorphous crystal directing agent to obtain a molecular sieve. The ZIF-based derived porous carbon-molecular sieve composite material prepared by the method has strong adsorption capacity for oxygen-containing compounds.

The application discloses an aluminum alloy surface imitation tooth enamel structure Ni-W plating layer and a preparation method thereof, and belongs to the technical field of surface modification of metal materials. The aluminum alloy surface imitation tooth enamel structure Ni-W plating layer is a mixed structure of nanocrystals and amorphous crystals, wherein the amorphous crystal content of the inner layer of the Ni-W plating layer combined with the aluminum alloy surface is lower than the amorphous crystal content of the outer surface layer of the Ni-W plating layer. The Ni-W plating layer has the characteristics of small crystal grains, high density, low porosity and the like, and the outer surface layer of the Ni-W plating layer has a high proportion of amorphous particles, so that the corrosion resistance and wear resistance of the plating layer are improved; the inner layer of the Ni-W plating layer combined with the aluminum alloy has a high proportion of crystal particles, so that the crystal type of the aluminum alloy is highly adaptable, and the binding force is good; the mixed structure has hardness and toughness, and the corrosion resistance, wear resistance and the like of the aluminum alloy pipe in various application scenarios are greatly enhanced.

The purpose of this invention is to provide a method for preparing a chromium-based heterojunction composite material and its application in sodium-ion batteries. The chromium-based heterojunction composite material is prepared by electrospinning and high-temperature annealing to achieve different degrees of selenization. The resulting unique amorphous / crystalline Cr₂O₃ / Cr₂Se₃ heterojunction material, when used as a negative electrode in sodium-ion batteries, exhibits excellent rate performance (250 mAh / g at 5 A / g) and high cycle capacity (350 mAh / g after 400 cycles at 0.1 A / g), attributed to the stress buffering effect, fast ion transport channels, and abundant interfacial active sites of the amorphous phase. This invention provides a new approach for the design of high-performance negative electrode materials for sodium-ion batteries.