197 results about "Lutetium" patented technology

The invention provides a method for providing composite luminescent particles, comprising: (a) providing (i) a luminescent material, comprising (A1-xBx)3(C1-yDy)5O12 nanoparticles or a precursor therefor, wherein A comprises one or more of yttrium, lutetium, gadolinium, lanthanum; B comprises one or more rare earth elements; C comprises one or more of aluminum, gallium, and scandium; D comprises one or more transition metal ions; and wherein 0≤x≤1, 0≤y≤1, and x+y>0; and (ii) further providing a precursor of an oxide material, wherein said oxide material has a melting point of at least 850°C; (b) mixing said (i) luminescent material comprising (A1-xBx)3(C1-yDy)5O12 nanoparticles or a precursor therefor and (ii) said precursor of an oxide material; (c) curing said precursor of said oxide material to obtain a cured particle, said cured particle comprising said luminescent material, and a coating of said oxide material; (d) heating said cured particle at a first temperature for a first duration, wherein said first temperature is 600 °C or higher, wherein said first duration is 10 minutes or more; and (e) heating said cured particle under a reducing atmosphere comprising carbon monoxide at a second temperature for a second duration, wherein said second temperature is 700 °C or higher, and wherein said second duration is 1 hour or more.

The invention relates to Eu (II) doped double perovskite red fluorescent powder as well as a preparation method and application thereof, and belongs to the technical field of inorganic luminescent materials. According to the red fluorescent powder capable of being excited by the blue light, disclosed by the invention, high-performance red light emission is realized by doping Eu < 2 + > with an oxide Sr2B1-xB 'O6 (wherein B is lutetium (Lu), B' is tantalum (Ta) or niobium (Nb), and x is greater than or equal to 0.01 and less than or equal to 0.10 as a matrix). The novel red fluorescent powder can be applied to white light LED illumination. When the fluorescent powder is used in combination with green light or yellow light fluorescent powder in the prior art, efficient white light is expected to be realized under the excitation of blue light, so that the color rendering performance of a white light LED is absolutely improved.

The invention relates to the technical field of porous material preparation processes, in particular to a preparation method of light low-thermal-conductivity lutetium silicate aerogel, which comprises the following steps: preparing composite sol; preparing and aging wet gel; drying the gel; preparing the aerogel; the lutetium silicate aerogel is prepared by combining in-situ sol-gel with a supercritical drying process, and the lutetium silicate aerogel has relatively high porosity, can be in a light, crack-free and complete block shape, and can be used for near-net size forming; the method is simple to operate, can realize fluidized production, and is easy to industrialize; the lutetium silicate ceramic aerogel prepared by adopting an in-situ synthesis mode has higher porosity, better thermal stability and lower thermal conductivity, and can tolerate the extreme temperature of 1500 DEG C.

The present invention belongs to the field of radioactive isotope preparation. Disclosed is a method for preparing carrier-free lutetium-177 by means of multistage continuous separation and purification. The method comprises: heating and dissolving a 177Lu-containing target material 176Yb2O3 which is subjected to neutron irradiation, so as to prepare a first nitric acid solution containing the target material; after filtering said first nitric acid solution and loading same onto a separation column, using a second nitric acid solution and a third nitric acid solution to wash the separation column, and allowing an effluent to pass a purification column and then loading same onto a conversion column; and using the first nitric acid solution and a hydrochloric acid solution to wash the conversion column. The method for preparing carrier-free lutetium-177 by means of multistage continuous separation and purification provided in the present invention has simple processes, is easily operable, implements multistage continuous separation for preparation of carrier-free lutetium-177, remarkably improves the recovery rate of lutetium-177, and offers a feasible and efficient method for high-efficient preparation of carrier-free lutetium-177.

The invention belongs to the technical field of radioactive isotope separation and purification, and particularly relates to a device for separating and purifying carrier-free lutetium 177. Comprising a mounting rack, a salt transfer assembly arranged in the middle of the front side of the mounting rack, a valve assembly arranged in the middle of the rear side of the mounting rack, a separation and purification column arranged on one side of the salt transfer assembly, a sample injection system arranged on one side of the valve assembly, a fraction assembly arranged above the mounting rack and a waste liquid assembly arranged on one side of the mounting rack, the control terminal is used for controlling the sampling system and the on-off of valves in the valve assembly so as to control the flowing of liquid in the separation and purification device, so that the functions of ytterbium and lutetium separation, lutetium-to-salt concentration and ytterbium-to-salt recovery in the separation and purification device are realized. The problems that in the prior art, an overall device for separating and purifying carrier-free lutetium-177 is large in size and occupied area, the requirement for the automation control degree is high, and the service life of parts is short are solved.

The invention discloses a device and method for recovering rare earth in yttrium lutetium silicate crystals, and relates to the technical field of yttrium lutetium rare earth recovery, the device comprises a rear vertical plate, a top plate, a middle plate and a workbench, the top of the top plate is rotatably connected with a first centrifugal cylinder, and the top of the middle plate is rotatably connected with a second centrifugal cylinder; and a switch valve is additionally arranged at the top of the first centrifugal cylinder. One of the core structures is the recycling barrel, the multifunctional composite assembly is arranged in the recycling barrel, and when the filter screen disc in the recycling barrel needs to be cleaned, the multifunctional composite assembly can automatically dredge blocked meshes of the filter screen disc through the weight when the recycling barrel is turned over; meanwhile, the multifunctional composite assembly can make the recycling barrel stop entering a to-be-treated water phase; when the recovery cylinder is turned over, the assembly can automatically dredge the blocked meshes of the filter screen disc by utilizing the self weight, so that the manual maintenance cost is reduced, and the self-cleaning capability of the equipment is improved.

The invention provides a rare earth silicon germanate scintillating material and a preparation method and application thereof, in particular to a rare earth silicon germanate scintillating material with high thermal stability and strong radiation resistance and a preparation method and application thereof, the general formula of the rare earth silicon germanate scintillating material with high thermal stability and strong radiation resistance is RE2 (1-x-delta / 2) Ce2xGedeltaSi (1-y + delta) Gey-deltaOz, in the formula, 0 lt; x is more than or equal to 0.05, y is more than or equal to 0.15 and less than or equal to 0.5, delta is more than or equal to 0 and less than or equal to 10 <-4 >, z is more than or equal to 4.95 and less than or equal to 5.05, RE represents a rare earth element, and the rare earth element is selected from at least one of lanthanum (La), lutetium (Lu), yttrium (Y) and gadolinium (Gd). The rare earth silicon germanate scintillating material provided by the invention has the characteristics of strong radiation damage resistance, high scintillation light output, low afterglow and the like while greatly improving the thermal stability, and can be used in occasions with extremely high requirements on the thermal stability or radiation resistance of the material, such as high-energy physical experiments, nuclear medicine imaging, oil exploration wells and the like.

The present disclosure relates to a radiopharmaceutical compositions, methods, and kits comprising 177Lu-PSMA I&T. The compositions, methods, and kits may have a molar ratio of the PSMA I&T to 177Lu from 4.4:1.0 to 7.6:1.0. The composition may be formulated as a solution for injection and the solution is suitable for administration at least 72 hours after formulation. The composition(s) have a radiochemical purity (RCP) of 95% or greater, 95.5% or greater, 96% or greater, 96.5% or greater, 97% or greater, 97.5% or greater, 98.0% or greater, 98.5% or greater, 99% or greater, or 99.5% or greater at administration.

The invention relates to the technical field of rare earth element separation methods, in particular to a method for separating ytterbium and lutetium by using a phosphate adsorbent, which comprises the following steps: loading a phosphate solution on a porous solid-phase carrier by using a vacuum impregnation method, and carrying out reduced pressure evaporation and drying to obtain a phosphate solid adsorbent; filling an exchange column with the solid adsorbent to obtain the exchange column filled with the solid adsorbent; enabling a nitric acid solution containing ytterbium and lutetium to flow through an exchange column filled with a solid adsorbent to complete a column adsorption process; and performing elution, performing desorption by using a desorption solution to obtain the regenerated exchange column filled with the solid adsorbent, respectively collecting the ytterbium solution and the lutetium solution, completing the separation process, and repeating the steps. By adopting the steps, the separation of ytterbium and lutetium is directly realized from the nitric acid solution containing ytterbium Yb and lutetium Lu through column adsorption separation, leaching and desorption processes, and high-purity ytterbium and lutetium products are prepared.

The invention relates to a preparation method of a cerium-doped lutetium yttrium silicate crystal, and relates to the technical field of scintillation crystal preparation. Compared with a traditional Czochralski method, the cerium-doped lutetium yttrium silicate is prepared through a flame fusion method, the growth speed of the flame fusion method is 15-20 mm / h, the growth rate is higher, consumable items such as an iridium crucible are not needed, mutual reaction between a high-temperature melt and the crucible is avoided, the cost is effectively reduced, and the cerium-doped lutetium yttrium silicate is obtained. The limitation of a crucible material on preparation of high-melting-point oxide crystals is eliminated, the crystal quality is improved, and the growth period is short.

The present disclosure relates to a radiopharmaceutical compositions, methods, and kits comprising 177Lu-PSMA I&T. The compositions, methods, and kits may have a molar ratio of the PSMA I&T to 177Lu from greater than 8.0:1.0 to 11.0:1.0. The composition may be formulated as a solution for injection and the solution is suitable for administration at least 72 hours after formulation. The composition(s) have a radiochemical purity (RCP) of 95% or greater, 95.5% or greater, 96% or greater, 96.5% or greater, 97% or greater, 97.5% or greater, 98.0% or greater, 98.5% or greater, 99% or greater, or 99.5% or greater at administration.

A sintered ceramic having corrosion resistance to a halogen containing corrosive gas or plasma, the sintered ceramic is disclosed. The sintered ceramic is a mixed lanthanoid garnet phase aluminum oxide having a formula of (YpLnq)3Al5O12) wherein p plus q are less than or equal to 100 mole percent wherein p is greater than or equal to 25 mole percent and less than or equal to 75 mole percent and wherein is greater than or equal to 25 mole percent and less than or equal to 75 mole percent wherein Y is yttrium and Ln is a lanthanoid, such as erbium, ytterbium, lutetium and combinations thereof.

The invention relates to a purple light-excited cyan light-emitting fluorescent material as well as a preparation method and application thereof. The cyan light emitting fluorescent material is a Ce < 3 + > doped oxide cyan light emitting fluorescent material, the chemical expression of the cyan light emitting fluorescent material is SrCa0. 7Mg0. 3Lu4-xO8: xCe < 3 + >, and x is more than or equal to 0.003 and less than or equal to 0.05. The preparation method comprises the following steps: weighing a strontium source compound, a calcium source compound, a magnesium source compound, a lutetium source compound and a cerium source compound according to a stoichiometric ratio of a chemical expression of the green light emitting fluorescent material, grinding and uniformly mixing to obtain a mixture; sintering the mixture at high temperature, and cooling to obtain the purple light excited cyan fluorescent material. Compared with the prior art, the method has the advantages of optimizing the crystal field environment, constructing a cyan fluorescent material with wide-spectrum excitation characteristic, high luminous efficiency and excellent thermal stability and the like.

This invention provides a highly conductive preformed solder sheet, comprising a core layer and a shell layer disposed around the core layer. By embedding the solid flux core layer within the solder alloy layer to form a sandwich-like shape, the flux can be effectively protected from oxidation. There is no need to apply flux before brazing or remove it after brazing, reducing manufacturing costs and the void rate on the welded surface, thus improving the reliability of the solder sheet. The solder alloy shell is composed of tin, silver, copper, indium, cerium, vanadium, lutetium, yttrium, and zinc. The addition of small amounts of rare earth elements lutetium, yttrium, and cerium improves the conductivity and heat transfer of the solder sheet. The addition of indium, vanadium, and zinc increases the melting point of the solder sheet and improves its solidification state. Since no magnetic materials such as lead, iron, cobalt, nickel, or niobium are added, signal interference caused by metals is avoided.

The invention relates to the technical field of tungsten alloy materials, in particular to a tungsten alloy wire and a preparation method and application thereof.The tungsten alloy wire is composed of, by mass, 0.4-1.1 wt% of L, 0.001-0.01 wt% of X, 0.001-0.25 wt% of Z and the balance tungsten and inevitable impurities; wherein L is one or more than two of lanthanum, cerium, praseodymium, neodymium, gadolinium and erbium; x is one or more than two of lutetium, europium, ytterbium, dysprosium, holmium, terbium and samarium; the Z comprises oxygen; the wire rod has a wire diameter of 20-60 [mu] m, the wire rod contains a linear L or L compound in the axial direction, and the average radial width D of the L or L compound is less than or equal to 5 nm. According to the tungsten alloy wire, the linear element L is doped between the tungsten matrixes, the radial average width of L is controlled to be smaller than or equal to 5 nm, the wire diameter of the wire can range from 20 micrometers to 60 micrometers, the tensile strength of 5000 MPa or above can be achieved under the wire diameter of 60 micrometers, and the machining performance of the tungsten alloy wire is enhanced.

The invention discloses a modification method of a ternary positive electrode material. The modification method comprises the following steps: S1, carrying out a co-precipitation reaction on a solution of transition metal sulfate in an inert gas atmosphere; a sulfate solution of rare earth elements is synchronously added in the coprecipitation process, and a ternary precursor with the surface coated with rare earth hydroxide is formed; and S2, mixing the ternary precursor obtained in the step S1 with a lithium source, calcining in an air atmosphere, and cooling to obtain the fast ion conductor coated ternary positive electrode material, the rare earth elements are selected from one or more of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium; the transition metal sulfate is soluble salt of Ni, Co and Mn. The rare earth element sulfate is added in the coprecipitation process, the rare earth element hydroxide is precipitated on the surface of the precursor, the lithium source is removed after filtering and drying, uniform mixing is performed, and the ternary positive electrode material which contains the rare earth element and is uniformly coated with the fast ion conductor is obtained after calcination, so that side reactions on the surface of the material are reduced; and the cycling stability of the positive electrode material is improved.

The invention relates to a microbial growth activation accelerant based on rare earth elements as well as a preparation method and application thereof, and belongs to the field of resources and environments. The microbial growth activation accelerant based on the rare earth elements is prepared from the following components: 1 to 150g of a rare earth compound, 0.2 to 2g of pantothenic acid, 0.2 to 2g of nicotinic acid, 0.02 to 0.1 g of nicotinamide and 1000g of deionized water, the rare earth compound is one or combination of more of chlorides of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium and yttrium, nitric acid compounds and sulfuric acid compounds. A large number of cheap light rare earth elements are used as raw materials of the microbial accelerator, a new utilization approach is provided for the light rare earth elements, the light rare earth elements are converted into high-added-value products, pollution of the light rare earth elements to the environment is reduced, and meanwhile new elements are introduced into the field of microbial accelerators. More importantly, the preparation method of the microbial growth activation accelerant based on the rare earth elements provided by the invention is simple in production process and convenient for large-scale production.

The present invention discloses a crystalline aluminosilicate small-pore zeolite having a maximum ring size of eight tetrahedral atoms, wherein the zeolite comprises copper, wherein the Cu: Al atomic ratio is between 0.12 and 0.55; and manganese, wherein the Mn: Cu atomic ratio is between 0.05 and 0.95; and a metal M, wherein M is selected from magnesium, calcium, barium, strontium, yttrium, titanium, zirconium, niobium, iron, zinc, silver, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and mixtures thereof, and wherein the M: Cu atomic ratio is between 0.05 and 0.80; and wherein the sum of the atomic ratios of copper, manganese and the metal M to aluminum, (Cu+Mn+M): Al, is between 0.20 and 0.80; and wherein the zeolite comprises at least 2.5 wt.-% of copper, calculated as CuO and based on the total weight of the zeolite. Catalyst substrate monoliths comprising the crystalline aluminosilicate zeolite are also disclosed. These catalyst substrate monoliths can be used in a process for the removal of nitrogen oxides from combustion exhaust gases, and they can be part of emissions treatment systems.

The invention discloses a lutetium-calcium-magnesium-aluminum-silicon garnet transparent ceramic material and application thereof in a white-light LED (light-emitting diode). The method comprises the following steps: (1) fusing SiO2, Al2O3, Lu2O3, CaO, MgO and raw materials doped with luminous ions to obtain glass liquid; (2) molding, cooling and annealing the molten glass to obtain a glass precursor; 3) performing heat treatment on the glass precursor to obtain the lutetium calcium magnesium aluminum silicon garnet ceramic; and luminous ions are more than one of Ce, Er, Nd and Cr. The method is simple, the prepared ceramic is good in luminescent property, high in heat conductivity and high in hardness, and the preparation method is simple and low in cost. The method can be used for preparing transparent ceramics with large sizes and various shapes, and is low in cost and easy for industrial production. The ceramic emits bright yellow light under the excitation of 450nm blue light, and the yellow light and the blue light are combined to generate strong white light, so that the ceramic can be used for preparing a white light LED (light-emitting diode).

The invention belongs to the technical field of inorganic scintillator materials, and particularly relates to a multi-element co-doped yttrium lutetium silicate scintillator and a preparation method and application thereof, and the material has excellent comprehensive performance of high light output, short decay time, high radiation hardness, high matching degree of emission spectrum and novel photoelectric sensors and the like. The invention further relates to a preparation method of the scintillator material and application of the scintillator material in radiation detection fields such as positron emission tomography (PET), time flight PET (TOF-PET), interaction depth PET (DOI-PET), single photon emission computed tomography (SPECT), high-energy physical experiments, nuclear medicine imaging, industrial nondestructive inspection, safety detection (such as luggage and cargo container inspection) and the like.

The application belongs to the field of inorganic materials, and particularly relates to a lutetium silicate ceramic material and a method for improving high-temperature water-vapor corrosion resistance of the lutetium silicate material, and is suitable for performance optimization and development and application of rare earth silicate materials for environmental barrier coating. The method comprises the following steps: (1) controlling the content of solvent atoms Ho in Lu2SiO5 according to the stoichiometric ratio; (2) increasing the wetting angle of the Lu2SiO5 ceramic material from 80.1+ / -0.5 degrees to 87.5+ / -0.6 degrees; and (3) reducing the weight loss of the material after corrosion in a water-vapor environment of 1000-1400 DEG C, 30% H2O-70% O2 for 30 hours from 0.221 mg / cm 2 2 to 0.0911 mg / cm 2 2. The application can significantly improve the corrosion resistance of the Lu2SiO5 material in a high-temperature water-vapor environment by designing the composition of Lu2SiO5 through specific rare earth element doping and optimizing the proportion of the doped rare earth elements in Lu2SiO5. Meanwhile, the wetting angle of the Lu2SiO5 material is increased and the hydrophobic property is improved after the rare earth atom solid solution doping, which provides important support for optimizing the high-temperature water-vapor corrosion resistance.

The invention relates to a novel functional material for X-ray protection, in particular to a liquid metal flexible shielding material and a preparation method and application thereof. The material comprises liquid metal and solid metal, the liquid metal serves as a solvent to be filled in gaps of the solid metal, the liquid metal is gallium, gallium indium, gallium indium tin, gallium indium tin zinc or mercury, and the solid metal is selected from one or more of indium, tin, gold, platinum, iridium, zirconium, niobium, molybdenum, ruthenium, osmium, rhenium, rhodium, tungsten, antimony, palladium, tantalum, hafnium, lutetium, lead, ytterbium, thulium, bismuth, silver, erbium, holmium, dysprosium, terbium, gadolinium, samarium, neodymium, lanthanum, praseodymium, cerium and europium. On the basis of compounding of the liquid metal solvent and the solid metal solute based on the liquid metal combinatology, the liquid metal and the solid metal are jointly used for protecting X-ray radiation, the comprehensive performance of X-ray protection is improved, and meanwhile the variety and number range of selectable metal elements is widened.

The present invention provides a method for providing a composite luminescent particle, comprising: (a) providing (i) a luminescent material comprising (A1-xBx) 3 (C1-yDy) 5O12 nanoparticles or a precursor thereof, A comprising one or more of yttrium, lutetium, gadolinium, lanthanum; b comprises one or more rare earth elements; c comprises one or more of aluminum, gallium and scandium; d comprises one or more transition metal ions; 0 < = x < = 1, 0 < = y < = 1, x + ygt; 0; and (ii) also providing an oxide material precursor, the oxide material having a melting point of at least 850 DEG C; (b) mixing (i) a luminescent material comprising (A1-xBx) 3 (C1-yDy) 5O12 nanoparticles or a precursor thereof with (ii) an oxide material precursor; (c) curing the oxide material precursor to obtain cured particles which comprise a luminescent material and an oxide material coating layer; (d) heating the cured particles at a first temperature of 600 DEG C or more for a first duration of 10 minutes or more; and (c) heating the cured particles at a second temperature of 700 DEG C or more for a second duration of 1 hour or more in a reducing atmosphere including carbon monoxide.

The invention relates to the technical field of photovoltaic cells, and provides a preparation method of a perovskite thin film and a perovskite cell module, the preparation method comprises the following steps: preparing an ABX3 type perovskite precursor liquid, A is at least one selected from methylamine and formamidine, or a combination of at least one selected from methylamine and formamidine and at least one selected from cesium and rubidium, and B is a combination of at least one selected from cesium and rubidium; b is selected from at least one of lead, tin, germanium and bismuth, and X is selected from at least one of iodine, bromine and chlorine; an ion curing agent and the perovskite precursor solution are mixed, the chemical general formula of the ion curing agent is CY3, and C is trivalent metal cations including lutetium, aluminum and lanthanum; y is a fluorine ion; performing coating and annealing treatment on the mixed perovskite precursor solution to obtain a perovskite thin film; the ionic curing agent is used for inhibiting migration of A-site cations and X-site anions. By using the method, the problem that the working stability of a device is reduced due to migration of halogen, formamidine and methylamine ions in the perovskite film under the conditions of illumination, temperature and electric field can be solved.

The present invention discloses a preparation method and application of a polymer polylactic acid nanocomposite material based on a copper-lutetium metal organic framework (Cu-LU) metal organic framework (MOF), belonging to the technical field of polymer composite materials. The method comprises the following steps: first, adding polylactic acid to dioxane to prepare a uniform polylactic acid solution; second, dispersing copper-lutetium metal organic framework (MOF) nanoparticles in dioxane to prepare a uniform dispersion of the Cu-lutetium metal organic framework (MOF) nanoparticles; third, adding the Cu-lutetium metal organic framework (MOF) nanoparticle dispersion obtained in step two to the polylactic acid solution obtained in step one, stirring at 60°C for 1 hour, obtaining a uniform film-forming solution for later use; and fourth, pouring the film-forming solution obtained in step three into a flat-bottomed glass dish and drying it to obtain a polylactic acid nanocomposite film having both antibacterial and ammonia-responsive functions. The present invention utilizes the above preparation method to obtain a polymer polylactic acid nanocomposite material having excellent water vapor barrier, mechanical strength, UV shielding, blue light shielding, and ammonia-responsive color change properties.

The invention discloses a preparation method of thermal shock resistant Nd: LuAG laser transparent ceramic. The preparation method comprises the following specific steps: weighing lutetium nitrate, aluminum nitrate and neodymium nitrate according to Lu3-xNdxAl5O12, and obtaining nano precursor powder by adopting a solvothermal method; carrying out two-step pre-sintering to form oxide powder with a sub-grain structure; and adding a thermal shock slow-release agent for main sintering, carrying out hot isostatic pressing treatment on the ceramic body after main sintering, and finally annealing in air to obtain the Nd: LuAG transparent ceramic with the density being greater than or equal to 99.9% and the thermal shock resistance temperature difference delta T being greater than or equal to 400 DEG C. The ceramics are particularly suitable for high repetition frequency laser systems.

A method for purifying lutetium includes providing a solid composition comprising ytterbium and lutetium and subliming or distilling ytterbium from the solid composition at a temperature of about 1196° C. to about 3000° C. to leave a lutetium composition comprising a higher weight percentage of lutetium than was present in the solid composition.

The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for removing thorium from a lutetium-containing liquid. The invention provides a method for removing thorium from a lutetium-containing liquid, comprising the following steps: extracting the lutetium-containing liquid with a metal extract to obtain an organic phase; the volume ratio of the metal extract to the lutetium-containing liquid is 5-10:1; mixing the organic phase with a hydrochloric acid solution for back extraction to obtain an aqueous phase; the molar concentration of the hydrochloric acid solution is 6.3-6.7 mol / L, and the volume ratio of the organic phase to the hydrochloric acid solution is 5-10:1; mixing the aqueous phase with an oxalic acid solution for precipitation to obtain a crude lutetium oxalate product; the mixing is carried out under stirring conditions, the stirring temperature is 58-62°C, and the stirring speed is 100-200 r / min; washing the crude lutetium oxalate product to obtain lutetium oxalate; the washing solvent is a mixed solution of ammonium oxalate solution and ethanol; the mass ratio of the crude lutetium oxalate product to the solvent is 1:3-5; and calcining the lutetium oxalate to obtain lutetium oxide.

The invention discloses a solar cell packaging adhesive film and a preparation method thereof, the solar cell packaging adhesive film comprises an ethylene-vinyl acetate copolymer and a light conversion material, the light conversion material comprises bismuth and lanthanum co-doped lutetium oxide, the molecular formula of the bismuth and lanthanum co-doped lutetium oxide is Lu2-x-yBixLayO3, x is 0.01-0.02, and y is 0.01-0.1. The bismuth-lanthanum co-doped lutetium oxide is uniformly compounded with the ethylene-vinyl acetate copolymer, so that ultraviolet light in sunlight can be effectively absorbed and converted into visible light capable of being utilized by a solar cell, and the energy conversion efficiency of the solar cell is improved.

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.