18 results about "Yttrium chloride" patented technology

The invention discloses a preparation method and application of a multimode luminescent cesium yttrium chloride lead-free perovskite luminescent material. In the specific synthesis process, firstly, precursor materials-cesium carbonate, yttrium carbonate and cerium acetate are dissolved in a mixed solution of glacial acetic acid and hydrochloric acid, and a precursor solution is obtained; then dissolving a certain amount of antimony acetate with acetonitrile to form an anti-solvent solution; and finally, adding the precursor solution into the anti-solvent solution to obtain the Sb / Ce double-doped cesium yttrium chloride lead-free perovskite luminescent material. During application, the Cs3YCl6 Sb and the Cs3YCl6 Sb / Ce luminescent materials are combined for use to form a pattern, and protected information can be decrypted through a specific excitation wavelength. According to the invention, the cesium yttrium chloride lead-free perovskite luminescent material capable of realizing multimode luminescence can be prepared in a short time.

The present application relates to a kind of micro CO efficient removal adsorbent and its preparation and application, the preparation method includes the following steps: (1) active carbon powder, active component A, inorganic clay and dispersing agent are placed in ball mill and are uniformly ground, and mixture material is obtained;(2) active component B and the water solution of reducing agent are atomized and sprayed into the mixture material, then glue is added, and wet material is obtained;(3) wet material is extruded into shape by template, after heat reduction, after drying, calcination, CO removal adsorbent is obtained, i.e. target product;Active component A is monovalent copper salt, and active component B is the mixture of lanthanum chloride and at least one of cerium chloride or yttrium chloride.The strength and adsorption capacity of the CO removal adsorbent of the present application are increased by more than 30% and 25% respectively, the strength is ≥40N / cm, the wear is ≤1.5wt%, the CO adsorption capacity is ≥35ml / g (40℃), the removal precision can reach below 0.01ppm, suitable for the efficient purification of trace CO in hydrogen, nitrogen and other raw gas.

This invention provides a method for preparing high-purity ultrafine yttrium oxide, relating to the field of ultrafine oxide powder preparation technology. The method involves removing impurities from a 5N-6N grade yttrium chloride solution to obtain a yttrium chloride solution with low non-rare earth impurities. While emulsifying and shearing an ammonia solution, the low-non-rare earth impurity yttrium chloride solution is introduced into the solution via atomization until the pH of the resulting solution reaches 8-10, yielding a yttrium hydroxide colloidal solution. While emulsifying and shearing the yttrium hydroxide colloidal solution, an oxalic acid solution is introduced into the solution via atomization until the pH of the resulting solution reaches 1.8-2.5. The solution is then filtered to obtain ammonium oxalate yttrium precipitate. Finally, calcination yields high-purity ultrafine yttrium oxide powder. This invention can prepare high-purity ultrafine yttrium oxide with a purity of 99.999-99.9999%, D... 50 The diameter is 0.3–0.5 μm, D 90 With a diameter of less than 1.0 μm, it is suitable for applications such as transparent ceramics and electronic ceramics.

The invention discloses a flexible silicon-modified zirconia fiber aerogel material for long-term efficient thermal protection and a preparation method thereof, and belongs to the technical field of structural ceramics and thermal insulation materials. The method comprises the following steps: synthesizing yttrium-stabilized zirconia precursor powder by taking zirconium chloride and yttrium chloride as raw materials and acetylacetone as a chelating agent; blending the powder with a silane coupling agent (the molar ratio of silicon to zirconium is (0.05-0.2): 1) and a spinning aid in a specific proportion to prepare a spinning solution; precursor fiber aerogel is obtained through electrostatic spinning, and a final product is obtained through segmented heat treatment. The prepared ceramic fiber has a unique core-shell structure, dispersed nanopores are uniformly distributed in the fiber core part, the outer layer is a compact shell layer, and the silicon element is mainly enriched in the grain boundary. According to the structure, the material has excellent flexibility (such as complete resilience under 98% compressive strain) and extremely low high-temperature thermal conductivity (about 0.083 W / m.K at the temperature of 1000 DEG C), and meanwhile, silicon doping effectively inhibits high-temperature grain growth. The material provided by the invention has wide application prospects in extreme environment fields such as high-temperature heat insulation, aerospace thermal protection and the like.

The application discloses a method for removing silicon from yttrium lutetium silicate leaching solution, which comprises the following steps: firstly, mixing yttrium lutetium silicate waste with flake alkali uniformly, then baking, adding hot water to stir and react, and filtering to obtain rare earth hydroxide precipitate; then, washing the obtained rare earth hydroxide precipitate with sodium hydroxide solution for 2-3 times; then, placing the treated rare earth hydroxide precipitate in a reaction container, adding a small amount of pure water to stir, heating to 70-90 DEG C under water bath condition, and then keeping constant temperature, then slowly adding hydrochloric acid to dissolve the rare earth hydroxide precipitate to obtain a mixed solution, filtering to remove silicic acid colloid to obtain rare earth leaching solution; then, using an extractant prepared from N235, isooctanol and kerosene to extract the rare earth leaching solution to remove impurity iron, then heating and concentrating to make sodium chloride in the solution precipitate, filtering to remove the precipitated sodium chloride, and finally obtaining pure lutetium yttrium chloride solution. The application can effectively solve the problem that the content of silicon impurities in the yttrium lutetium silicate leaching solution is high and cannot be effectively removed.

The invention relates to a preparation method of tris (methyl cyclopentadienyl) yttrium, which comprises the following steps: under a protective atmosphere, S1, carrying out first heating reaction on yttrium chloride and methyl cyclopentadienyl sodium in the presence of a first organic solvent, and adding an organic ligand to carry out second heating reaction after full reaction to obtain an intermediate product; the organic ligand is lithium bis (trimethylsilyl) amide and / or potassium bis (trimethylsilyl) amide; and S2, carrying out a stirring reaction on the intermediate product and methyl cyclopentadiene in the presence of a second organic solvent, filtering, collecting filtrate, and removing the solvent to obtain the tri (methyl cyclopentadienyl) yttrium. According to the preparation method, chlorine which is not substituted by methyl cyclopentadienyl in N (TMS) 2-substituted yttrium chloride is introduced and then substituted by methyl cyclopentadiene to prepare tris (methyl cyclopentadienyl) yttrium, so that the substitution efficiency of chlorine in the raw material yttrium chloride can be effectively improved, the yield of a target product is greatly improved and can reach 86%, and the purity can reach 5N.

This invention discloses a zirconium-yttrium bimetallic MOF adsorbent, its preparation method, and its applications. The preparation method includes: adding deprotonated 2-aminoterephthalic acid dropwise to a mixed solution containing zirconium chloride, yttrium chloride, and glacial acetic acid, stirring at room temperature to obtain the zirconium-yttrium bimetallic MOF adsorbent. The adsorbent is then added to water containing a certain concentration of As and / or P, and adsorbed by isothermal shaking to remove As and / or P from the water. This invention enhances the adsorption activity for As and / or P through the special coordination and electrostatic interactions between zirconium and yttrium bimetals and As and P. The zirconium-yttrium bimetallic MOF adsorbent prepared by this invention uses a green synthesis route with room temperature doping, requiring no high-temperature operation. The adsorbent can be reused, with minimal waste, and can remove As and / or P from water. It has low preparation and usage costs, is environmentally friendly, and has a wide range of applications.

The invention provides a preparation method of a hole sealing coating for a plasma spraying thermal barrier coating, and relates to the technical field of high-temperature thermal insulation materials. The hole sealing coating comprises the following raw materials in parts by weight: 40-50 parts of ammonia water (with the concentration of 25%), 30-50 parts of enamel powder, 30-50 parts of functional powder, 20-30 parts of zirconium oxychloride, 20-30 parts of yttrium chloride, 5-10 parts of ytterbium nitrate, 5-10 parts of gadolinium nitrate, 5-10 parts of dysprosium nitrate, 5-10 parts of chromic nitrate, 5-10 parts of tantalum pentoxide, 5-10 parts of niobium pentoxide, 3-5 parts of titanium dioxide, 3-5 parts of silicon dioxide, 3-5 parts of a binder, 60-90 parts of absolute ethyl alcohol and 40-60 parts of a solvent. The nano ceramic powder is prepared by using a hydrothermal reaction method, then the enamel powder, the nano ceramic powder and the like are mixed, wet grinding, drying, tabletting and calcining are performed to prepare a ceramic block which is applied to film plating, and the hole sealing coating is high in density and bonding strength, and can slow down the transmittance of oxygen, improve the oxidation resistance, improve the radiation coefficient of the coating and prolong the service life.

The invention discloses a forming method of an environment-friendly coating for enhancing wear resistance of an aluminum three-dimensional plate, and belongs to the technical field of environment-friendly coatings, yttrium chloride heptahydrate and graphene oxide are subjected to surface acylating chlorination treatment through a hydrothermal combination calcination method, then nano silicon carbide is aminated, and a silicon carbide / graphene composite filler is obtained through an acylating chlorination-amidation method; then coating with hydrophobic titanium dioxide to obtain a composite filler, compounding the composite filler with water-borne epoxy resin, a dispersing agent and other substances in proportion, and uniformly stirring to obtain the composite environment-friendly coating. After the surface of an aluminum three-dimensional plate is pretreated, a composite environment-friendly coating is sprayed to the surface of the aluminum three-dimensional plate through a two-time spraying method, and the forming method of the environment-friendly coating for enhancing the wear resistance of the aluminum three-dimensional plate is completed. And a high-adhesion, high-wear-resistance and super-hydrophobic functional coating is formed on the surface of the aluminum three-dimensional plate.

The invention discloses a Y and S co-doped RuO2 electrocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: adding anhydrous ruthenium trichloride, anhydrous yttrium chloride and powdered sulfur into absolute ethyl alcohol, uniformly stirring and dispersing, transferring the obtained mixture into a muffle furnace, heating to 550-650 DEG C, calcining for 1.5-3.5 hours, cooling to room temperature, and grinding the product into powder, thereby obtaining the Y and S co-doped RuO2 electrocatalyst. The Y and S co-doped RuO2 electrocatalyst has excellent oxygen evolution activity and stability in a strong acid medium, the preparation process is simple, the energy consumption is low, and a new thought is provided for reasonably constructing a high-stability ruthenium-based oxygen evolution electrocatalyst.

The application relates to a preparation method of tris (methylcyclopentadienyl) yttrium, which comprises the following steps: S1, under a protective atmosphere, carrying out first heating reaction of yttrium chloride and sodium methylcyclopentadienyl in the presence of a first organic solvent, adding an organic ligand to carry out second heating reaction after sufficient reaction, and obtaining an intermediate product; the organic ligand is lithium di (trimethylsilyl) amide and / or potassium di (trimethylsilyl) amide; S2, carrying out stirring reaction of the intermediate product and methylcyclopentadiene in the presence of a second organic solvent, filtering to collect filtrate, and removing a solvent to obtain tris (methylcyclopentadienyl) yttrium. ‑ The application can effectively improve the substitution efficiency of chlorine in raw material yttrium chloride by introducing N(TMS)2 ‑ substituting chlorine in yttrium chloride which is not substituted by methylcyclopentadienyl, and then substituting methylcyclopentadiene to prepare tris (methylcyclopentadienyl) yttrium, so that the substitution efficiency of chlorine in the raw material yttrium chloride can be effectively improved, the yield of the target product can be greatly improved, can be as high as 86%, and the purity can reach 5N.

The invention relates to a high-flux synthesis method of yttrium-magnesium-based multiphase powder and a preparation method of large-size multiphase ceramic. The high-flux synthesis method of the yttrium-magnesium-based multiphase powder comprises the following steps: (1) mixing a raw material containing a yttrium source and a magnesium source with a solvent, heating and continuously stirring to obtain a yttrium-magnesium precursor solution; the yttrium source is selected from at least one of yttrium chloride, yttrium nitrate and yttrium acetate; the magnesium source is selected from at least one of magnesium chloride, magnesium nitrate and magnesium acetate; the molar ratio of yttrium ions to magnesium ions in the yttrium-magnesium precursor solution is (1: 3)-(3: 4); and (2) synthesizing the yttrium-magnesium-based multiphase powder by adopting a flame spray pyrolysis method.

A continuous production method of high-purity anhydrous yttrium chloride comprises the following steps: S1, grinding yttrium oxide into powder, and carrying out vacuum heating, drying and dehydration pretreatment; s2, adding the powder obtained in the step S1 into a vertical reaction furnace from the upper part at a constant speed under the condition of air isolation for reaction; s3, 3-5 h after feeding is completed, the mixed gas of hydrogen chloride and chlorine is switched into inert gas; stopping all heating on the vertical reaction furnace, and naturally cooling the reaction furnace to room temperature; and S4, replacing the atmosphere in the product collecting pipe with inert gas, opening a valve, discharging into a collecting tank under the protection of the inert gas, and packaging under the protection of the inert gas to obtain the high-purity anhydrous yttrium chloride. According to the method, a continuous preparation process is adopted from feeding to product discharging, and the product purity can stably reach 99.99% or above, so that the electronic-grade application requirement is met.

This invention provides a method for preparing tris(methylcyclopentadienyl)yttrium. This method can efficiently remove key impurities, simplifying the process while effectively improving the purity and yield of tris(methylcyclopentadienyl)yttrium. The preparation method includes the following steps: S1, under an inert atmosphere, methylcyclopentadiene and a bis(trimethylsilyl)amino potassium salt solution are mixed at a temperature ≤30°C, and then the temperature is raised to 75-85°C for reaction; after the reaction, the mixture is filtered under reduced pressure to obtain a cyclopentadienyl potassium salt intermediate; S2, under an inert atmosphere, yttrium trichloride and the cyclopentadienyl potassium salt intermediate are mixed in the presence of a solvent, and then the temperature is raised for reaction; after the reaction, the mixture is filtered, the filtrate is collected, and the filtrate is concentrated under reduced pressure to obtain a crude product; S3, the crude product is pretreated by reduced pressure distillation to obtain a pretreated product; then, it is sublimated under vacuum to obtain the tris(methylcyclopentadienyl)yttrium.

The present application relates to the technical field of ceramic preparation, and discloses a low-temperature sintering method for yttrium oxide ceramics, which comprises the following steps: mixing yttrium oxide powder with halide complex phase additives containing anhydrous yttrium chloride and anhydrous yttrium fluoride, and pressing the mixture into a green body; first, heating in a dry inert atmosphere to make the additives melt and wet the particles; then, introducing water vapor and controlling the partial pressure, using the priority hydrolysis of yttrium chloride to build a porous framework, and maintaining the communication of exhaust channels; finally, increasing the temperature and the water vapor partial pressure to drive the hydrolysis of yttrium fluoride and complete the densification. The present application uses the step-by-step hydrolysis characteristics of the additives to realize the ordered transition from liquid phase filling to solid phase framework support, and solves the problems of premature closure of exhaust channels and deformation of the green body due to bubbling during low-temperature sintering. The prepared yttrium oxide ceramics have fine grains, high density and no grain boundary impurities, and have excellent mechanical properties and corrosion resistance.

The application discloses a method for preparing 2-micron solid zirconia microspheres in batches by regulating binding energy, comprising the following steps: step 1, weighing zirconium oxychloride, yttrium chloride and polyethylene glycol in a beaker, adding deionized water, stirring in a water bath kettle until completely dissolved, and obtaining a mixed solution; step 2, weighing urea and ethylene glycol in a beaker, adding deionized water, stirring until completely dissolved, adding the mixed solution obtained in step 1, and heating and stirring the obtained white suspension in a water bath kettle; step 3, centrifuging and washing the white suspension, and obtaining precursor wet powder through solid-liquid separation; step 4, preparing slurry and uniformly stirring for spray drying, and obtaining spherical precursor dry powder; and step 5, placing the precursor dry powder in a muffle furnace, and performing high-temperature calcination under air to obtain 2-micron solid zirconia microspheres; the method is green and safe, raw materials are easy to obtain, and processing cost is low, and can be widely applied in the fields of 3D printing ceramics, biomedical treatment and the like.

The invention provides a corrosion-resistant coating for a heat exchanger tube in a high-temperature chloride molten salt environment and a preparation method thereof, and the preparation method comprises the following steps: mixing, stirring and drying aluminum powder, aluminum chloride powder, yttrium chloride powder and cerium chloride powder to obtain a mixture 1; mixing the mixture 1 with chloride mixed salt to obtain a mixture 2; and in the inert gas environment, the mixture 2 is heated to be in a liquid state, the liquid mixture 2 wraps the surface of the heat exchanger, an anti-corrosion coating is generated on the surface of the heat exchanger tube under the heat preservation condition, and the anti-corrosion coating comprises, by mass, 10%-20% of aluminum, 1%-4% of chromium, 0.5%-2% of nickel, 0.02%-0.1% of a cerium-yttrium mixture and the balance iron. The corrosion-resistant coating on the surface of the heat exchanger tube is prepared during molten salt flowing, so that the corrosion resistance of the heat exchanger tube is improved by more than 10 times, and the problem of strong corrosion of an alloy material under high-temperature molten chlorate in next-generation solar thermal power generation is solved.

The application belongs to the technical field of welding material, and particularly relates to a low-temperature high-toughness nickel-based welding rod and a preparation method thereof. The nickel-based welding rod comprises a welding core, a rare earth modified graphene coating coated on the surface of the welding core, and a coating coated on the surface of the rare earth modified graphene coating. The preparation method of the rare earth modified graphene comprises the following steps: adding graphene oxide and yttrium chloride hexahydrate into water to perform a hydrothermal reaction, so as to obtain a modified graphene precursor; and calcining the modified graphene precursor in an inert gas atmosphere, so as to obtain the rare earth modified graphene. The rare earth modified graphene coated on the surface of the welding core can increase the arc stability, and can also serve as a strengthening phase to improve the strength and toughness of the weld in the cladded metal.