131 results about "Yttrium chloride" patented technology

The invention relates to a method for preparing fluorescent nano material converted on NaYF4, comprising the steps: yttrium nitrate, ytterbium nitrate and erbium nitrate or yttrium chloride, ytterbium chloride, erbium chloride and thulium chloride are dissolved in de-ionized water according to the mixture radio that the mol ratio of rare earth ions which are yttrium ion, ytterbium ion and erbium ion is equal to (70-95): (1-25): (0.5-10), so that the mixed solution is prepared; water soluble polymer having the ligand radical with the rare earth ions is added into the mixed solution for stirring reaction to form complex compound; the pH value of the mixed solution is adjusted to be 2-6; sodium fluoride, ammonium fluoride or hydrofluoric acid can be added into the mixed solution and stirred until colloid solution that is approximately transparent is obtained; then, the colloid solution is put into a high pressure closed reactor and heated at the temperature of 140-200 DEG C; after that the obtained product is cooled to be the room temperature, centrifugated, separated, washed and dried, finally, the fluorescent nano material converted on NaYF4 is obtained. The method can be used for preparing the converted material at lower temperature, the particle size and the appearance can be controlled, and the water-solubility is good.

The present invention provides a method for preparing a zirconium oxide refractory fiber. The method adopts zirconium oxychloride, aqueous hydrogen peroxide solution, yttrium chloride or yttrium nitrate as raw material, the inorganic zirconium spinnable glue solution is made by reaction and compression, the gelatinous fiber can be obtained by centrifugal fiber forming, and after heat treating sintering the zirconium oxide refractory fiber which has the following advantages can be obtained: crystal phase composition with square phase and/or cubic phase zirconium oxide, purity up to 99.5% above, diameter around 5 mu m, length approximate continuous, soft and flexible property and without slag including sphere. The using temperature of the fiber is above 1600 DEG C, the material can be used as extreme temperature refractory, heat insulation material, protecting material, ablative material, satellite battery separator material and the like, used for the fields of aerospace, war industry and national defense, atomic energy and the like; the fiber can also be used as the flame-proof heat-insulating material of the extraordinary high-temperature electric furnace with temperature 1600 DEG C to 2200 DEG C, the oil or gas burning furnace and other extraordinary high-temperature heating mechanism, and is used for the fields of ceramic sintering, crystal growth, metal smelting, petroleum cracking, scientific researching and the like. The invention totally adopts the inorganic raw material, has the advantages of low cost, no pollution, simple technique and excellent effect.

The invention discloses supra transition luminescence substrate material NaYF4 nanometer crystal preparing method. It includes the following steps: (1) dissolving rare earth yttrium oxide in perchloric acid or hydrochloric acid with 0.1-0.5mol/l density and 0-6 pH to produce perchloric acid yttrium or yttrium chloride solution; (2) preparing hydroxyl carboxyl series complexing agent with 0.2-1.0mol/l density, mixing it with the (1) solution, adjusting the pH at 0-6; the mol ratio of the perchlorate or hydrochloride and hydroxyl carboxyl series complexing agent is 1:1-5; (3) preparing sodium fluoride aqueous solution with 0.02-1mol/l density and 10 pH, adding the (2) solution at 0-45 degree centigrade, aging for 1-5h; the mol ratio of the sodium fluoride and the total rare earth ion is 1:1.2-30; (4) separating precipitate, washing, drying to gain nanometer NaYF4 particle. The produced NaYF4 particle has the advantages of controllable size with 10-25 nanometer, simple technology and device, good product quality and repeatability.

The invention belongs to the field of low-temperature electrochemical extraction and particularly relates to a method for preparing an aluminum-based rare earth alloy through near-room-temperature electrolysis. The method for preparing the aluminum-based rare earth alloy through near-room-temperature electrolysis is an electrolytic method, and a electrolyte adopted by the electrolytic method is formed by rare earth chloride and ionic liquid, wherein the ionic liquid accounts for 96-98% of the total mass of the electrolyte, the rare earth chloride accounts for 2-4% of the total mass, and the rare earth chloride is one of neodymium chloride, lanthanum chloride, cerium chloride, scandium chloride, yttrium chloride, praseodymium chloride, samarium chloride, europium chloride, gadolinium chloride and terbium chloride. According to the technological for preparing the aluminum-based rare earth alloy through near-room-temperature electrolysis, operation is easy, and cost is low; and the technological reserve and theoretical support are provided for green extraction of the low-cost aluminum-based rare earth alloy.

The invention discloses a hydro-thermal synthesis method for nanometer YSZ (Yttria-Stabilized Zirconia, i.e. ZrO2 eutectic containing 8%-10% of Y2O3 in molar fraction) serving as an electrolyte material of a solid oxide fuel cell. The YSZ is a main raw material of the solid oxide fuel cell; and manufacturing the YSZ of high quality is an important approach to increase the performance of the solid oxide fuel cell. The hydro-thermal synthesis method comprises the following steps of: dissolving a certain proportion of zirconium oxychloride and yttrium chloride in water, co-precipitating the mixed liquor by using urea as a precipitating agent in the temperature of more than 70 DEG C, pulping filter cakes by using deionized water after ageing, filtering and washing, carrying out hydro-thermal synthesis on sizing agent under a high temperature and a high voltage to form nanometer crystal products, sanding and carrying out ultrasonication, high-speed centrifugal seperation and spray drying to prepare the nanometer YAZ with good eutectic effect and excellent performance.

The invention relates to a calcium carbonate filler and in particular relates to a rare earth compound/titanate coupling agent modified ultrafine calcium carbonate filler. The modified calcium carbonate is prepared from the following raw materials in parts by weight: 200 parts of ultrafine calcium carbonate, 1-2 parts of talcum powder, 1-2 parts of homo-polypropylene, 2-4 parts of jade powder, 1-2 parts of zinc sulfate, 1-2 parts of yttrium chloride, 1-2 parts of praseodymium chloride, 1-2 parts of lanthanum nitrate, 1-2 parts of titanate coupling agent TMC-TTS, 1-2 parts of graphene and 4-5 parts of accessory ingredient. According to the modified calcium carbonate powder, composite rare earth compounds such as yttrium chloride, praseodymium chloride, lanthanum nitrate and the like and the titanate coupling agent TMC-TTS are used for modifying the ultrafine calcium carbonate, so that performance indexes such as oil absorption value, viscosity and activating rate are improved; the ultrafine calcium carbonate is more easily dispersed and dissolved in high-molecular polymers; and when the ultrafine calcium carbonate is used for filling a PVC (Polyvinyl Chloride) material, the mechanical property of the PVC material is effectively improved and the good effect of toughening and reinforcing is achieved.

Disclosed is an improved yttrium partially stabilized zirconia production process which comprises subjecting the mixed water dissolved material of zirconium oxychloride and yttrium chloride for coprecipitation reaction with ammonia, i.e., letting the mixed water dissolved material of zirconium oxychloride and yttrium chloride into 4-6N of ammonia for coprecipitation, terminating the reaction when the pH of the solution reaches 9-10, the concentration of the zirconium oxychloride in the mixed water solution being 280-350g/L if converted to zirconium oxide, the ratio of zirconium oxide and yttrium oxide is 95.2-94 : 4.8-6, then washing the precipitate with deionized water, carrying out centrifugal dehydration, drying, firing and disintegrating to obtain the product.

The invention relates to a preparation method of a NaYF4:Er<3+>@NaYF4@TiO2 nanocrystalline dye-sensitized solar cell photo-anode material, relating to a preparation method of a dye-sensitized solar cell photo-anode material, and aiming to solve the technical problem that dye-sensitized solar cells prepared in the prior art have low photoelectric conversion efficiency. The method comprises the following steps: firstly preparing nanocrystalline with the characteristic of spectrum conversion with yttrium chloride, erbium chloride, sodium hydroxide and ammonium fluoride and then adding nanocrystalline to a reaction liquid of yttrium chloride, sodium hydroxide and ammonium fluoride to prepare nanocrystalline NaYF4:Er<3+>@NaYF4 with a core-shell structure; then adding nanocrystalline with the core-shell structure to a mixed liquid of oleylamine and oleic acid, then adding ethanol, water and tetrabutyl titanate, reacting in a high pressure reactor, and washing and drying to obtain nanocrystalline NaYF4:Er<3+>@NaYF4@TiO2. Nanocrystalline can be mixed in the photo-anode material to prepare dye-sensitized solar cells.

The invention discloses a method for preparing narrow-distributed ultra-fine yttrium oxide by sodium carbonate precipitation. The method utilizes sodium carbonate as a precipitating agent and yttriumchloride as a material liquid and a parallel feeding method, strictly controls the conditions in seed crystal preparation, precipitation aging and staged roasting, especially controls the temperate and pH in the seed crystal preparation and precipitation aging and the temperature in the staged roasting, and prepares the narrow-distributed yttrium oxide powder with the primary particle sizes of less than or equal to 100nm, the secondary particle size D50 of less than or equal to 4 micrometers and (D90-D10)/(2D50) of less than 1.0. The method has the advantages of low cost, easy industrialization and removal of ammonia nitrogen pollution, can transform the advantages of China's plutonium resources into economic advantages and plays an important role in promoting the upgrading of the China'srare earth industry.

The invention relates to a method for preparing a rare-earth fluorescent up-conversion material by use of waste fluorescent powder. The method comprises the following steps: weighing process waste fluorescent powder, and leaching the fluorescent powder in a sulfuric acid solution to obtain a solution; performing solid-liquid separation, regulating the pH by use of ammonia water, and then performing primary sedimentation, secondary sedimentation, third sedimentation, fourth sedimentation, aging and filtering to obtain filter residue; firing at a high temperature, cooling until the temperature drops to a room temperature, and then adding MOH solution and performing suction filtration to obtain white powder; adding a hydrochloric acid solution, and drying by distillation to obtain the mixture of anhydrous yttrium chloride and anhydrous europium chloride, MOH solid and MHF2 fine powder and RmF3 or RmCl3 solid, and homogenizing; adding a high boiling point solvent, heating and stirring; centrifuging, performing centrifugal washing on the obtained solid powder by use of normal hexane or acetone, drying and then washing by use of boiling water a plurality of times and drying, thereby obtaining the rare-earth fluorescent up-conversion material. The method for preparing the rare-earth fluorescent up-conversion material by use of the waste fluorescent powder has the advantage and the characteristic that green high-value recycling comprehensive utilization of rare earth elements in rare-earth trichromatic phosphor waste can be realized.

The invention discloses a method for improving high temperature mechanical properties of a hollow turbine blade ceramic mold. According to the invention, a yttrium-aluminum garnet high temperature strengthening phase is synthesized from yttrium oxide and alumina through high temperature sintering, magnesium oxide is utilized at the same time for inhibiting growth of an alumina crystal grain under the condition of high temperature sintering, and titanium oxide is used for solution strengthening of alumina so as to improve high temperature strength of an alumina-based ceramic mold; finally, an yttrium chloride ion solution is used for dipping of the alumina-based ceramic mold to allow yttrium ions to be uniformly distributed in the alumina-based ceramic mold with a complex structure, so on the one hand, chloride ions are enabled to react with impurity Na and K ions in an alumina ceramic material to form sodium chloride and potassium chloride under high temperature sintering, thereby removing the Na element and the K element, and on the other hand, the yttrium ions are enabled to react with alumina under high temperature sintering for secondary formation of the yttrium-aluminum garnet high temperature strengthening phase. The method provided by the invention can be used for improving high temperature mechanical properties of a core-shell integrated alumina-based ceramic mold for a hollow turbine blade and improves a qualified rate of a directionally solidified high temperature alloy blade.

A novel electroluminescent compound which emits blue or blueish purple light is a complex of a lanthanide or actinide and an organic complex e.g. mono(bathophenanthroline) thoriumIV chloride or mono(tripyridyl)yttrium chloride.

Chestnut shell active carbon is prepared by the following raw materials by weight: 120-140 parts of chestnut shell, 3-5 parts of zinc chloride, 4-6 parts of Arabic gum, 4-6 parts of periston, 25-30 parts of bentonite, 10-15 parts of alumina, 20-25 parts of pumice, 2-4 parts of lanthanum chloride, 2-4 parts of cerium chloride, 2-4 parts of scandium chloride, 2-4 parts of yttrium chloride, 2-4 parts of praseodymium chloride, 1-3 parts of lanthanum nitrate, 1-3 parts of cerium nitrate, 1-2 parts of scandium nitrate, 1-2 parts of yttrium nitrate, 1-2 parts of praseodymium nitrate, 4-5 parts of modified diatomite, and a proper amount of water. Chestnut shell is used as a raw material, so as that the active carbon has advantages of developed aperture structure, big specific surface area, high adsorption speed, and good adsorption capability on various solutes and dissociation gases; lanthanum chloride is used for activation so as to form active carbon, which has big gaps and strong adsorption capability, is suitable for absorbing organic matters in air and water and removing harmful substances like formaldehyde, is low in cost, and is suitable for industrialization production.

The invention discloses a preparation method for a zirconium oxide porous ceramic artwork. The preparation method comprises the following steps: adding a hydrochloric acid solution in a yttrium oxide solution to generate a yttrium chloride solution; mixing the yttrium chloride solution, a zirconium oxychloride solution and polyethylene glycol, and dropwise adding an aqueous ammonia solution to generate yttrium hydroxide precipitate and zirconium hydroxide precipitate; washing the yttrium hydroxide precipitate and the zirconium hydroxide precipitate with water, filtering, then cleaning with absolute ethyl alcohol and drying to obtain a zirconium oxide ceramic precursor; dispersing the obtained zirconium oxide ceramic precursor in the absolute ethyl alcohol, drying and calcining, and then carrying out ball milling to obtain zirconium oxide ceramic powder; mixing the zirconium oxide ceramic powder, a pore former and a tackifier, and then preparing to obtain an artwork green body; and calcining the artwork green body, and preparing to obtain the zirconium oxide porous ceramic artwork. According to the preparation method for the zirconium oxide porous ceramic artwork, through the pore former and the tackifier, the green body is prepared, and is calcined again to obtain the zirconium oxide porous ceramic artwork with relatively high mechanical performance.

The invention discloses a preparation method of yttrium stabilized zirconium oxide powder with low monoclinic phase and high activity. The preparation method comprises the following steps of: reacting zirconium oxychloride serving as a raw material with concentrated sulfuric acid at a high temperature to produce zirconium basic sulfate; performing precipitation reaction on the zirconium basic sulfate serving as a carrier, yttrium chloride and ammonia water in an aqueous solution to finally produce a zirconium stabilized precursor; and mechanically diffusing, drying, sintering and introducing gas flow to finally obtain the yttrium stabilized zirconium oxide powder. The yttrium stabilized zirconium oxide powder is prepared by a chemical and mechanical combined method; and the prepared powder has low monoclinic phase content, less agglomerates and high sintering activity.

The invention discloses a preparation method of a rare earth-doped fluoride up-conversion luminescent nano dispersion, belongs to the cross fields of chemical engineering, materials and photonics, andrelates to a method for preparing the rare earth-doped fluoride up-conversion luminescent nano dispersion by utilizing a super-gravity reaction intensifying technology, i.e. a rotating packed bed reactor. Raw materials and reagents required for realizing the synthetic method of the rare earth-doped fluoride up-conversion luminescent nano dispersion comprise rare earth chlorate, sodium hydroxide,ammonium fluoride, a surfactant, deionized water and absolute ethanol, wherein the rare earth chlorate comprises yttrium chloride, ytterbium chloride and erbium chloride; the surfactant is respectively prepared from oleic acid, oleylamine and sodium citrate; a dispersion solvent is prepared from ethanol, tetrahydrofuran, cyclohexane, chloroform and toluene. According to the preparation method disclosed by the invention, the rotating packed bed reactor is introduced for premixing a reaction precursor solution, and molecular uniform mixing is realized, so that the rare earth-doped fluoride up-conversion luminescent nano dispersion which is small in particle size and narrow in particle size distribution is synthesized.

The invention relates to a preparation method of high-purity yttrium oxide, belonging to the field of rare earth separation technologies. The preparation method comprises the following steps: putting a rare earth chloride solution containing Ho, Er, Tm, Yb, Lu and Y enrichments and tertiary amine into a vessel with a stirring device, and stirring; putting a first extraction agent and the pre-treated rare earth chloride solution into a vessel with a stirring device, and standing until phase splitting, thus obtaining a pre-equilibration solution; adding pure water into the pre-equilibration solution, evenly stirring to obtain an yttrium-enriched material, and controlling the mol concentration of the yttrium-enriched material; taking the yttrium-enriched material as a raw material, and performing continuous extraction separation by using a second extraction agent and adding a washing solution, a reverse extraction solution and liquid alkali, thus obtaining a crude yttrium chloride solution; taking the crude yttrium chloride solution as a raw material, performing successive extraction separation by using a third extraction agent and adding a washing solution and a reverse extraction solution, thus obtaining a high-purity yttrium chloride solution; introducing the high-purity yttrium chloride solution into a precipitation tank; and introducing solid yttrium oxalate into a roller type tunnel kiln, and firing to obtain the finished product. The preparation method embodies cyclic utilization of waste water and environment protection.

The invention relates to a refining flux for smelting of magnesium alloy, and in particular relates to a refining flux for smelting of WE43 magnesium alloy, and a preparation method and a usage method thereof. The refining flux is characterized by comprising the following raw materials, by weight: 60-62% of potassium chloride, 5-10% of calcium fluoride, 3-5% of yttrium chloride, 8-12% of calcium chloride and 18-20% of barium chloride. The invention has the advantages of easily available raw materials, effectively controlled smelting cost, good refining effect, significantly increased yields of Y and Nd elements, and further saving of rare earth resources; therefore, the invention has a breakthrough significance in the research of the field.

The invention discloses a method of preparing a dye-sensitized solar cell photo anode material capable of absorbing near infrared sunlight in multiple bands, which relates to the dye-sensitized solar cell photo anode material preparation method and aims at solving the technical problem of low infrared band sunlight utilization by the existing method of enhancing the dye-sensitized cell by an up-conversion material. The method comprises steps: yttrium chloride, ytterbium chloride, erbium chloride and ammonium fluoride are firstly used for preparing nanocrystalline which serves as crystal nucleus; the nanocrystalline is then diffused in a ytterbium chloride and ammonium fluoride raw material solution, and a first-layer core-shell structure nanocrystal is obtained; the first-layer core-shell structure nanocrystal is diffused in a yttrium chloride, holmium chloride and ammonium fluoride raw material solution for reaction, and a two-layer core-shell structure nanocrystal is obtained; and the two-layer core-shell structure nanocrystal is diffused in a raw material solution containing tetrabutyl titanate, and after a hydrothermal reaction, the photo anode material is obtained. The method of the invention can improve the photoelectric conversion efficiency of the solar cell.

The invention discloses a method for recycling rare earth element yttrium from waste fluorescent powder and preparing a resin surface composite coating, and belongs to the field of solid waste resource utilization. The method comprises the following steps of: mechanically crushing a waste CRT fluorescent screen and screening the crushed waste CRT fluorescent screen through a screen with certain mesh number to remove impurities such as glass, thereby obtaining fluorescent powder oriented powder; carrying out oxidizing and acid-leaching treatment on the screened fluorescent powder, and leaching out rare earth elements in the fluorescent powder; extracting most of yttrium and a small part of europium through a multi-stage extracting method, reversely extracting to obtain a yttrium chloride solution, and regulating the pH value of the yttrium chloride solution until white precipitates just appear; adding the yttrium chloride solution into an ammonium hydrogen carbonate solution containing a dispersing agent drop by drop to prepare a precursor; drying and roasting the precursor to obtain nano yttrium oxide powder; and finally, adding the nano yttrium oxide powder into a plating solution containing the dispersing agent to prepare a composite electroplating solution, and electroplating the composite electroplating solution to a conductive plastic surface prepared from resin and carbon-series conductors.

The invention discloses a method for preparing anti-oxidation coatings on the surfaces of molybdenum and a molybdenum alloy. The method can be used for preparing Hf-Y mixed oxide coatings on the surfaces of the molybdenum and the molybdenum alloy by adopting a stepwise brushing method. The method comprises the following steps: firstly carrying out alkali cleaning degreasing and pickling decontamination on the surfaces of the molybdenum and the molybdenum alloy, washing, and then carrying out hydrofluoric acid surface etching treatment to prepare a substrate; then preparing a normal propyl alcohol solution of hafnium oxychloride and yttrium chloride according to a certain proportion to prepare a needed coating liquid; uniformly brushing the coating liquid to the substrate surfaces of the molybdenum and the molybdenum alloy; and after the coating liquid is brushed every time, firstly drying and then roasting, repeating for 15-30 times, and roasting for 1-2 hours for the last time to prepare the Hf-Y mixed oxide coatings on the surfaces of the molybdenum and the molybdenum alloy. The coatings prepared through the method have the advantages of excellent high temperature oxidation resistance, compact coating material, good compatibility with the substrate and difficulty in dropping and greatly enlarges the usage ranges of the molybdenum and the molybdenum alloy.