71 results about "Lutetium" patented technology

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 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 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 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 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.

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 application discloses a lutetium manganate-based near-infrared light detection film, a preparation method and application thereof, and has a molecular formula of Lu (0.98‑x) Er 0.02 Yb x MnO3, wherein x is 0.04-0.10. The application is prepared by rare earth elements Er and Yb co-doping for regulation, and a Lu (0.98‑x) Er 0.02 Yb x MnO3 base film colloid, when x is 0.04-0.10, the optical absorption range is widened and the band gap is reduced, and due to efficient energy transmission between Er 3+ , Yb 3+ , efficient pumping of Er 3+ is realized, thereby enhancing the photovoltaic effect of the LMO film, greatly improving the photoelectric current density, and improving the responsivity and the detection rate by several times under 850 nm near-infrared wavelength. The up-conversion strategy based on multiple rare earth elements co-doping has positive multiple positive effects on the light detection performance, and promotes the development of the ferroelectric series in the field of light detection. Meanwhile, the material is expected to become a new generation of environment-friendly lead-free ferroelectric film material.

The invention discloses a preparation method of 5N-grade ultra-pure lutetium oxide, which comprises the following steps: removing thorium and uranium from a lutetium chloride solution, carrying out primary precipitation with oxalic acid, firing to obtain a primary lutetium oxide product, re-dissolving the primary lutetium oxide product with nitric acid, carrying out secondary precipitation with ammonia water, and firing to obtain the 5N-grade ultra-pure lutetium oxide. According to the method disclosed by the invention, the preparation of lutetium oxide with higher purity can be realized by combining extraction with impurity grading removal of oxalic acid-ammonia water double precipitation so as to meet quality index requirements required by application of materials with higher performance. The preparation method is high in stability, high in yield and suitable for industrial production and application.

Provided is an aluminum alloy powder comprising 0.1-2.0 mass% or one or more metal elements from among rare earth metal elements comprising the lanthanide elements and yttrium, wherein the iron content is suppressed to not more than 2.0 mass%. The rare earth metal element is preferably one of praseodymium, neodymium, europium, samarium, terbium, gadolinium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium.

The application relates to the technical field of ceramic compositions, and discloses an X7R type MLCC anti-aging ceramic dielectric material and a preparation method thereof, which comprises barium titanate, magnesium oxide, lutetium oxide, manganese dioxide and glass frit; wherein magnesium ions and lutetium ions occupy titanium positions on the surface layer of the barium titanate crystal lattice and combine with oxygen vacancies to generate ternary composite defect clusters; the ternary composite defect clusters are locally distributed in the shell layer region of the barium titanate crystal grain and are used for improving the long-range electric migration activation energy of the oxygen vacancies; through the construction of an ion and electron double shielding network, the directional migration of the oxygen vacancies under high-temperature direct current bias is inhibited, the contradiction between the conventional anti-aging means and the dielectric constant maintenance is solved, the high dielectric activity of the polarization area of the barium titanate is ensured, the high-temperature insulation reliability of the ceramic dielectric material is enhanced, and the capacitance aging process is delayed.

This invention provides a method for recovering rare earth elements from lutetium yttrium silicate crystal waste and its application. The method includes the following steps: mixing lutetium yttrium silicate crystal waste with an alkaline substance for alkali fusion, followed by water leaching and acid leaching to obtain an acid leaching solution; mixing the acid leaching solution with an inorganic polymer flocculant and an alkaline solution for preliminary desiliconization to obtain a first desiliconized solution; mixing the first desiliconized solution with a phosphorus-based extractant for extraction to remove impurities, obtaining an extract and a raffinate; performing deep desiliconization on the raffinate using resin adsorption or heteropolyacid extraction to obtain a second desiliconized solution; mixing the second desiliconized solution with a precipitant solution for precipitation to obtain a precipitate product, and then calcining the precipitate product to obtain rare earth oxides. This method can reduce the silicon content to below 1 mg / L, comprehensively recover rare earth elements such as Y and Lu, effectively reduce acid and alkali consumption, improve the comprehensive utilization rate of waste materials, and increase economic benefits.

An yttrium-containing structure comprises: (a) a substrate layer comprising a metal alloy, a ceramic material, a ceramic composite, or a combination thereof; (b) a bond-coat layer disposed on the substrate layer, or on an optional interlayer that is on the substrate layer, wherein the bond-coat layer comprises yttrium and a noble metal selected from the group consisting of platinum, iridium, rhenium, ruthenium, rhodium, osmium, and / or palladium; (c) a thermally grown oxide layer disposed on the bond-coat layer, wherein the thermally grown oxide layer comprises yttrium oxide; and (d) optionally, a top-coat layer disposed on the thermally grown oxide layer, wherein the top-coat layer comprises a metal oxide, a metal pyrochlore, or a metal silicate. Yttrium may be replaced with lutetium, in which the bond-coat layer comprises lutetium and a noble metal (e.g., Pt or Ir). A mixture of yttrium and lutetium may also be employed.

The invention discloses a Yb-alpha-beta-Sialon composite ceramic and a preparation method thereof, and belongs to the technical field of ceramic processing, and the Yb-alpha-beta-Sialon composite ceramic comprises the following components: Si3N4, Al2O3, AlN, Yb2O3, Lu2O3, nano SiC whisker, Ti3SiC2, a liquid metal gallium indium tin alloy, a bonding aid and a sintering aid. Double rare earth stabilizers (ytterbium and lutetium) are introduced, the radius of ytterbium ions is large, and an alpha-Sialon phase is mainly stabilized; the lutetium ions are small in radius and mainly stabilize the beta-Sialon phase, the combination can more effectively enter lattice vacancies of different crystal phases, the grain boundary migration speed is restrained, and excessive growth of grains is hindered.

Piezoelectric material comprising a ceramic material with the composition (1-x) ((Bi (a-y) RE y ) FeO3) - x (Ba b TiO3), where the molar fractions x and y satisfy the following conditions 0.28 ≤ x ≤ 0.34 and 0.0005 ≤ y ≤ 0.032 ; where RE is one or more elements from the group consisting of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and yttrium, where a = 1.04 and where b = 1.007, where the composition belongs to the perimeter and interior of a polygon which has the following eight points P (x; y) as vertices with respect to the values ​​of x and y: P1 = (0.301; 0.032); P2 = (0.304; 0.004); P3 = (0.304; 0.0315); P4 = (0,310; 0,003); P5 = (0.310; 0.029); P6 = (0.314; 0.026); P7 = (0,327; 0,005); P8 = (0,329; 0,0005).

The invention belongs to the technical field of inorganic non-metallic materials, and particularly relates to a preparation method of a high-consistency cerium-doped lutetium silicate crystal. The preparation method of the high-consistency cerium-doped lutetium silicate crystal comprises the following steps: (1) processing a cerium-doped lutetium silicate single crystal, so that the size of the cerium-doped lutetium silicate single crystal in at least one dimension is not greater than 20mm; and (2) placing the processed cerium-doped lutetium silicate single crystal in a high-temperature furnace, introducing an oxygen-containing atmosphere into the furnace, raising the temperature of the furnace to 1100-1400 DEG C, keeping the temperature for 30-120 hours, and then cooling to room temperature along with the furnace. Through the method which is simple in process, remarkable in effect and suitable for large-scale production, the cerium-doped lutetium silicate crystal high in consistency is obtained, and the light output and the energy resolution of the cerium-doped lutetium silicate crystal can be stably and repeatedly improved to the high level.

The invention discloses an extraction agent, a preparation method thereof and application of the extraction agent to metal separation. The invention discloses a phosphoryl compound, which is a compound as shown in a formula I or a salt thereof. The extraction agent provided by the invention is good in selectivity of separating thulium, ytterbium and lutetium elements, and high in extraction rate of extracting gallium, indium, nickel, cobalt and copper elements; the extractant is stable in structure, can be recycled for multiple times and is not easy to decompose.

The invention provides a high-temperature-resistant far infrared radiation ceramic coating, a ceramic coating and a preparation method, and relates to the technical field of surface engineering. The high-temperature-resistant far infrared radiation ceramic coating disclosed by the invention is prepared from the following raw materials in parts by weight: 12 to 22 parts of lutetium pyrotantalate; 10 to 16 parts of hafnium boride; 8-14 parts of nitrogen aluminum titanium; 9 to 15 parts of gadolinium zirconate; 4 to 7 parts of molybdenum disilicide; 2 to 5 parts of samarium hexaboride; 6 to 11 parts of pyrochlore type zirconium tungstate; 1 to 2.5 parts of a sintering aid; 0.5 to 1.5 parts of carbon nano onion; 3 to 6 parts of bismuth vanadate; 5 to 9 parts of phosphotungstic acid; and 1-3 parts of lithium molybdate. According to the high-temperature-resistant far infrared radiation ceramic coating disclosed by the invention, various rare earth compounds and refractory metal compounds are introduced to form a unique multi-phase composite system, and all the components generate a synergistic effect in an optimized interval, so that the thermal stability, thermal shock resistance and mechanical strength of the coating are remarkably improved; and finally, long-acting protection under extreme working conditions of high temperature, corrosion and abrasion of the water cooling wall of the boiler is realized.

The application provides white silicon nitride ceramics and a preparation method and application thereof. The method comprises the following steps: providing raw materials, wherein the raw materials comprise silicon nitride powder, a sintering aid, rare earth oxides and a dispersing agent, the rare earth oxides comprise at least one of lanthanum oxide, gadolinium oxide and lutetium oxide; mixing the raw materials, then performing ball milling, and then performing drying to obtain to-be-sintered materials; performing compression molding on the to-be-sintered materials to obtain to-be-sintered green bodies; sintering the to-be-sintered green bodies, and obtaining white silicon nitride ceramics after cooling. In this way, the to-be-sintered materials are sintered by using the above components, and the mixed system of the sintering aid and the rare earth oxides in the raw materials can reduce the concentration of free silicon inclusions in the ceramics, reduce the formation of color centers, introduce appropriate pores in the ceramics, and thus improve the light reflection ability of the ceramics, and further improve the whiteness of the silicon nitride ceramics. Therefore, the white silicon nitride ceramics with high strength and good comprehensive performance can be prepared by using the above method.

The invention belongs to the technical field of membrane separation, and relates to a method for separating lutetium in heavy rare earth elements by adopting a hollow fiber membrane module, the hollow fiber membrane module at least comprises a double-tube pass with a U-shaped interlaced structure and a shell pass sleeving the surface of the double-tube pass, and the double-tube pass comprises a first U-shaped tube pass and a second U-shaped tube pass which are interlaced with each other; the heavy rare earth elements at least comprise thulium, ytterbium and lutetium; the method at least comprises the following steps: (1) respectively preparing a feed liquid phase, a reverse extraction phase and an organic phase; wherein the feed liquid phase contains heavy rare earth elements; the organic phase at least contains an extraction agent; and (2) respectively and correspondingly introducing the feed liquid phase and the reverse extraction phase into a first U-shaped tube pass and a second U-shaped tube pass, introducing an organic phase into a shell pass, and performing three-phase synchronous circulating flow for extraction and reverse extraction to complete separation of lutetium in the heavy rare earth element. According to the method, efficient separation of lutetium in the heavy rare earth element is achieved through the hollow fiber membrane assembly, and high selectivity, stable structure, high efficiency and low consumption are all considered.

The invention provides an Hf and Ce co-doped yttrium lutetium silicate scintillation crystal as well as a preparation method and application thereof, and relates to the technical field of scintillation crystal material preparation. The chemical formula of the yttrium lutetium silicate scintillation crystal is (Hf < x > Ce < y > Y < z > Lu < 1-x-y-z >) < 2 > SiO < 5 >, x is less than or equal to 0.1, 0lt; y is less than or equal to 0.05, 0lt; z is less than or equal to 0.2, and is prepared by co-doping tetravalent Hf ions (Hf < 4 + >) in the lutetium yttrium silicate Ce-doped crystal, the introduction of Hf < 4 + > competes with oxygen vacancies and shallow electron traps in the crystal to capture electrons, and the concentration of the electron traps is effectively reduced, so that the fluorescence and flicker decay time of the crystal is effectively shortened, and the response speed of the crystal to radiation is improved.

The invention relates to the field of catalysts, in particular to an SCR catalyst and application. The SCR catalyst comprises a carrier and an active component loaded on the carrier, the carrier comprises a molecular sieve; the active components comprise Cu, Co and metal M; the metal M comprises at least one of calcium, magnesium, barium, strontium, scandium, titanium, vanadium, chromium, manganese, iron, nickel, zinc, gallium, germanium, yttrium, zirconium, niobium, molybdenum, antimony, tungsten, bismuth, polonium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium and lutetium. According to the SCR catalyst provided by the invention, the active components Cu and Co and the metal M (such as magnesium, barium, strontium, scandium, titanium and the like) are simultaneously loaded on the molecular sieve, and the active component Co and the metal M generate a synergistic effect, so that the low-temperature NOx conversion performance of the copper-based molecular sieve catalyst is greatly improved by combining the active component Co and the metal M.

This invention relates to the field of isotope production using the vertical flux detector channel of a heavy water reactor. Addressing the problems of inefficient isotope production using the vertical flux detector channel of a heavy water reactor, and the simultaneous production of multiple isotopes, this invention provides a target for isotope production using the vertical flux detector channel of a heavy water reactor. Several inner target tubes are arranged inside an outer target tube. The outer target tube has upper and lower end plugs at both ends. A metal wire is attached to the upper end plug to allow the target to enter or exit the reactor core through the vertical flux detector channel. The inner target tubes are loaded with at least one target material to produce at least one isotope. This invention has a simple structure, is easy to manufacture, and can achieve mass production of short-half-life medical isotopes such as lutetium-177, strontium-89, and holmium-166 using the vertical flux detector channel of a heavy water reactor.

The embodiment of the invention provides microcrystalline glass, the composition of the microcrystalline glass is Re2O3-TiO2-HfO2-A l2O3-X2O5, Re is at least one of lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, yttrium and scandium, and X is at least one of vanadium, niobium and tantalum. According to the glass ceramic, a plurality of different oxides are adopted, and the optical properties, structural characteristics and the like of the glass ceramic are adjusted by reasonably adjusting the ratio of each compound, so that the glass ceramic has the optical properties of high refractive index, high light transmittance and the like, and the average transmittance of visible light with the wavelength range of 400-800nm of the glass ceramic reaches 80-96%; and the refractive index of the microcrystalline glass is 1.8-2.0, so that the microcrystalline glass meets the use requirements of wearable equipment. The embodiment of the invention further provides a preparation method of the microcrystalline glass and wearable equipment.

The utility model belongs to the technical field of radioactive isotope separation and purification, and particularly relates to a system 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 controls the sampling system and the on-off of valves in the valve assembly to control the flow of liquid in the separation and purification system, so that the functions of ytterbium and lutetium separation, lutetium-to-salt concentration and ytterbium-to-salt recovery in the separation and purification system are realized. The utility model solves the problems in the prior art that the whole system for separating and purifying the carrier-free lutetium-177 is large in size, large in occupied area, high in requirement on automation control degree and short in service life of parts.