18 results about "Amorphous Crystals" patented technology

The invention provides a preparation and application method of a solid super-lubricating two-dimensional material, the two-dimensional material is prepared through a one-dimensional amorphous crystal self-stripping layer, the preparation process is very simple and environment-friendly, water can be used as a solvent, low-cost large-scale preparation is easy to realize, and the solid super-lubricating two-dimensional material has very high quality and monolayer property. The two-dimensional material has extremely weak interlayer acting force, shows excellent solid super-lubrication performance, and can realize the super-lubrication behavior that the friction coefficient of a sliding part is lower than 0.01 in an atmospheric environment, and the interlayer adhesive force is 40-80% of that of graphite. The friction wear of the sliding part can be greatly reduced, and the friction material is suitable for various sliding friction parts, such as bearings, sliding blocks and micro-electro-mechanical systems.

This work innovatively realizes the effective regulation of the crystalline / amorphous crystal surface by subjecting the phosphide to low-temperature liquid nitrogen quick freezing treatment, and prepares a thin-sheet CoO x / CoP-L catalyst and its preparation method, the preparation method is simple to operate, low cost, and has better economic benefits. x The crystalline / amorphous heterogeneous interface formed by the CoP-L flakes effectively promotes the adsorption and desorption of water during hydrogen evolution, while the lattice distortion optimizes the CoO x The electronic structure of / CoP‑L ultimately achieves improved performance and exhibits excellent performance in hydrogen evolution reactions in both alkaline and acidic media. Under alkaline and acidic conditions, only 56.6mV and 98mV overpotentials are required, respectively, to drive 10mA cm ‑2 It is worth noting that the alkaline HER process has a current density of 68 mA cm ‑2 The catalytic activity begins to exceed that of commercial Pt / C electrode, showing excellent catalytic potential.

An acetone sensor based on boron-doped cobalt tetroxide with an amorphous / crystalline heterostructure, as well as its preparation method and application, belongs to the field of gas sensor technology. The sensor consists of an Al2O3 ceramic tube substrate, two parallel and separate annular Au electrodes coated on the outer surface of the ceramic tube substrate, a gas-sensitive film coated on the outer surface of the ceramic tube and the annular Au electrodes, and a nickel-chromium alloy heating coil passing through the interior of the ceramic tube. The gas-sensitive film is made of boron-doped cobalt tetroxide with an amorphous / crystalline heterostructure. This unique amorphous / crystalline heterostructure not only maintains the stable structure of the crystalline material but also leverages the advantages of the amorphous structure, such as high electron delocalization and a large number of reaction sites, thereby improving the acetone gas-sensing performance of the cobalt tetroxide material. The resulting sensor has high sensitivity to acetone and a low detection limit, and has good application prospects.

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.

The application relates to a preparation method of basic ammonium iron phosphate, which comprises the following steps: dropping a phosphorus salt solution with a N:P molar ratio of 0.95-1.5 and containing an oxidant into a ferrous sulfate solution above 93 DEG C, generating a precipitate while dropping and oxidizing, rapidly performing crystal transformation on the generated amorphous basic ammonium iron phosphate, generating the first crystal as a crystal seed, inducing the subsequent amorphous crystal to perform crystal transformation, and obtaining the basic ammonium iron phosphate. In the application, a part of particle crystal transformation is first allowed, the subsequent particle crystal transformation is induced as a crystal seed, the nucleation and growth of the crystal are in a stable state in the whole process, the ordered growth of the particles is facilitated, the basic ammonium iron phosphate product with uniform particle, good sphericity and pure phase is easily obtained, the whole process is simple, easy to operate, high in efficiency and low in cost.

[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 an enamel-imitating structure Ni-W coating on the surface of aluminum alloy and a preparation method of the enamel-imitating structure Ni-W coating, and belongs to the technical field of metal material surface modification. The enamel-imitated Ni-W coating on the surface of the aluminum alloy is of a mixed structure of nanocrystals and non-crystals, and the content of the non-crystals on the inner layer of the Ni-W coating combined with the surface of the aluminum alloy is lower than that of the non-crystals on the outer surface of the Ni-W coating. The Ni-W coating is of a mixed structure in which nanocrystals and non-crystals are uniformly distributed and has the characteristics of fine crystal grains, high density, low porosity and the like, the proportion of amorphous particles on the outer surface layer of the Ni-W coating is relatively high, the corrosion resistance and the wear resistance of the coating are improved, the proportion of crystal particles on the inner layer combined with aluminum alloy is relatively high, and the corrosion resistance and the wear resistance of the coating are improved. The aluminum alloy pipe is high in crystal form adaptability with aluminum alloy and good in binding force, the mixed structure has hardness and toughness, and the corrosion resistance, abrasion resistance and other performance of the aluminum alloy pipe in various application scenes are greatly improved.

The invention discloses a one-dimensional amorphous crystal, and provides a method for preparing a high-quality two-dimensional material on a large scale at low cost. The one-dimensional amorphous crystal can be self-stripped in a solvent to form a highly uniform two-dimensional material suspension. The preparation method of the two-dimensional material is very simple in process, high in speed and low in cost, water can be used as a solvent, and the two-dimensional material is environment-friendly and easy to amplify for large-scale preparation; the obtained two-dimensional material has very high quality, few defects and good monolayer property, has a transverse size capable of reaching a millimeter level, and has a wide potential application prospect, for example, the two-dimensional material can be used as a template material for preparing a nano material surface mask, or can be used as a micro-catalytic container, a catalyst precursor, a drug carrier, a coating additive and an electronic sensing device.

The application discloses iodipam amorphous matter and a preparation method thereof, and the iodipam amorphous matter has an X-ray powder diffraction pattern and diffraction peaks as shown in Fig. 1. Crude iodipam of any crystal form is added into a first solvent, heated, refluxed and stirred until completely dissolved, refluxed, cooled and crystallized, and filtered to obtain wet iodipam. The wet iodipam is added into a second solvent, stirred until completely dissolved, and spray-dried at a certain temperature to obtain the iodipam amorphous matter. The amorphous crystal obtained through the production method has good stability, high application value, and the whole process is suitable for industrial and industrialized production.

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.

Proposed is a two-dimensional nanosheet, which can significantly improve catalytic efficiency by realizing a two-dimensional nanosheet structure with a high specific surface area including a metal material having an amorphous crystal structure as an electrochemical catalyst to fully utilize the characteristics of a metal oxide catalyst material with excellent electrical conductivity and, at the same time, which is easy for mass synthesis in manufacturing method due to its relatively simple manufacturing process, and is easy to realize ultra-thin and large-area.

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 present invention discloses a method for preparing an amorphous pure metal material, comprising the following steps: preparing a pure metal material in a polycrystalline or single crystal state, then pre-processing the surface of the pure metal material so that the surface roughness of the pure metal material is no greater than Sa 1.6 μm; using a polycrystalline diamond tool to perform rough cutting on the end face of the metal material; using a single crystal diamond tool to perform fine processing on the metal material; quickly removing the finely processed pure metal material from an ultra-precision machine tool and storing it in a vacuum environment or a protective gas atmosphere that does not chemically react with the pure metal material, wherein the finely processed pure metal material contains amorphous crystals and has an amorphous layer on the surface of the processed pure metal material. By using an extremely sharp single crystal diamond tool to perform ultra-precision cutting on the pure metal material, utilizing the extremely high shear strain and strain rate generated during the cutting process, an amorphous pure metal structure is obtained in the surface layer and sub-surface layer.

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.